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846e33c7 | 1 | /* |
fecb3aae | 2 | * Copyright 1995-2022 The OpenSSL Project Authors. All Rights Reserved. |
aa8f3d76 | 3 | * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved |
c80149d9 | 4 | * Copyright 2005 Nokia. All rights reserved. |
8c74b5e5 | 5 | * |
2c18d164 | 6 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
846e33c7 RS |
7 | * this file except in compliance with the License. You can obtain a copy |
8 | * in the file LICENSE in the source distribution or at | |
9 | * https://www.openssl.org/source/license.html | |
8c74b5e5 | 10 | */ |
846e33c7 | 11 | |
d02b48c6 | 12 | #include <stdio.h> |
fc24f0bf | 13 | #include <time.h> |
dee0cc10 | 14 | #include <assert.h> |
706457b7 DMSP |
15 | #include "../ssl_local.h" |
16 | #include "statem_local.h" | |
ec577822 BM |
17 | #include <openssl/buffer.h> |
18 | #include <openssl/rand.h> | |
19 | #include <openssl/objects.h> | |
20 | #include <openssl/evp.h> | |
dbad1690 | 21 | #include <openssl/md5.h> |
3c27208f | 22 | #include <openssl/dh.h> |
d7e498ac | 23 | #include <openssl/rsa.h> |
d095b68d | 24 | #include <openssl/bn.h> |
3c27208f | 25 | #include <openssl/engine.h> |
49b26f54 | 26 | #include <openssl/trace.h> |
1ee22dc2 MC |
27 | #include <openssl/core_names.h> |
28 | #include <openssl/param_build.h> | |
449bdf37 | 29 | #include "internal/cryptlib.h" |
f9b3bff6 | 30 | |
38b051a1 TM |
31 | static MSG_PROCESS_RETURN tls_process_as_hello_retry_request(SSL_CONNECTION *s, |
32 | PACKET *pkt); | |
33 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL_CONNECTION *s, | |
34 | PACKET *pkt); | |
35 | ||
36 | static ossl_inline int cert_req_allowed(SSL_CONNECTION *s); | |
37 | static int key_exchange_expected(SSL_CONNECTION *s); | |
38 | static int ssl_cipher_list_to_bytes(SSL_CONNECTION *s, STACK_OF(SSL_CIPHER) *sk, | |
ae2f7b37 | 39 | WPACKET *pkt); |
ea262260 | 40 | |
61ae935a MC |
41 | /* |
42 | * Is a CertificateRequest message allowed at the moment or not? | |
43 | * | |
44 | * Return values are: | |
45 | * 1: Yes | |
46 | * 0: No | |
47 | */ | |
38b051a1 | 48 | static ossl_inline int cert_req_allowed(SSL_CONNECTION *s) |
61ae935a MC |
49 | { |
50 | /* TLS does not like anon-DH with client cert */ | |
b7fa1f98 | 51 | if ((s->version > SSL3_VERSION |
555cbb32 TS |
52 | && (s->s3.tmp.new_cipher->algorithm_auth & SSL_aNULL)) |
53 | || (s->s3.tmp.new_cipher->algorithm_auth & (SSL_aSRP | SSL_aPSK))) | |
61ae935a MC |
54 | return 0; |
55 | ||
56 | return 1; | |
57 | } | |
58 | ||
59 | /* | |
a455d0f6 | 60 | * Should we expect the ServerKeyExchange message or not? |
61ae935a MC |
61 | * |
62 | * Return values are: | |
63 | * 1: Yes | |
64 | * 0: No | |
65 | */ | |
38b051a1 | 66 | static int key_exchange_expected(SSL_CONNECTION *s) |
61ae935a | 67 | { |
555cbb32 | 68 | long alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
61ae935a MC |
69 | |
70 | /* | |
71 | * Can't skip server key exchange if this is an ephemeral | |
a455d0f6 | 72 | * ciphersuite or for SRP |
61ae935a | 73 | */ |
a455d0f6 MC |
74 | if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK |
75 | | SSL_kSRP)) { | |
76 | return 1; | |
61ae935a MC |
77 | } |
78 | ||
a455d0f6 | 79 | return 0; |
61ae935a MC |
80 | } |
81 | ||
0f1e51ea MC |
82 | /* |
83 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed | |
84 | * handshake state transitions when a TLS1.3 client is reading messages from the | |
85 | * server. The message type that the server has sent is provided in |mt|. The | |
86 | * current state is in |s->statem.hand_state|. | |
87 | * | |
94ed2c67 MC |
88 | * Return values are 1 for success (transition allowed) and 0 on error |
89 | * (transition not allowed) | |
0f1e51ea | 90 | */ |
38b051a1 | 91 | static int ossl_statem_client13_read_transition(SSL_CONNECTION *s, int mt) |
0f1e51ea MC |
92 | { |
93 | OSSL_STATEM *st = &s->statem; | |
94 | ||
95 | /* | |
96 | * Note: There is no case for TLS_ST_CW_CLNT_HELLO, because we haven't | |
97 | * yet negotiated TLSv1.3 at that point so that is handled by | |
98 | * ossl_statem_client_read_transition() | |
99 | */ | |
100 | ||
101 | switch (st->hand_state) { | |
102 | default: | |
103 | break; | |
104 | ||
3847d426 MC |
105 | case TLS_ST_CW_CLNT_HELLO: |
106 | /* | |
107 | * This must a ClientHello following a HelloRetryRequest, so the only | |
108 | * thing we can get now is a ServerHello. | |
109 | */ | |
110 | if (mt == SSL3_MT_SERVER_HELLO) { | |
111 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
112 | return 1; | |
113 | } | |
114 | break; | |
115 | ||
0f1e51ea | 116 | case TLS_ST_CR_SRVR_HELLO: |
e46f2334 MC |
117 | if (mt == SSL3_MT_ENCRYPTED_EXTENSIONS) { |
118 | st->hand_state = TLS_ST_CR_ENCRYPTED_EXTENSIONS; | |
119 | return 1; | |
120 | } | |
121 | break; | |
122 | ||
123 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
0f1e51ea | 124 | if (s->hit) { |
92760c21 MC |
125 | if (mt == SSL3_MT_FINISHED) { |
126 | st->hand_state = TLS_ST_CR_FINISHED; | |
0f1e51ea MC |
127 | return 1; |
128 | } | |
129 | } else { | |
92760c21 MC |
130 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { |
131 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
132 | return 1; | |
f5ca0b04 MC |
133 | } |
134 | if (mt == SSL3_MT_CERTIFICATE) { | |
0f1e51ea MC |
135 | st->hand_state = TLS_ST_CR_CERT; |
136 | return 1; | |
137 | } | |
b67cb09f TS |
138 | #ifndef OPENSSL_NO_COMP_ALG |
139 | if (mt == SSL3_MT_COMPRESSED_CERTIFICATE | |
140 | && s->ext.compress_certificate_sent) { | |
141 | st->hand_state = TLS_ST_CR_COMP_CERT; | |
142 | return 1; | |
143 | } | |
144 | #endif | |
0f1e51ea MC |
145 | } |
146 | break; | |
147 | ||
92760c21 MC |
148 | case TLS_ST_CR_CERT_REQ: |
149 | if (mt == SSL3_MT_CERTIFICATE) { | |
150 | st->hand_state = TLS_ST_CR_CERT; | |
151 | return 1; | |
152 | } | |
b67cb09f TS |
153 | #ifndef OPENSSL_NO_COMP_ALG |
154 | if (mt == SSL3_MT_COMPRESSED_CERTIFICATE | |
155 | && s->ext.compress_certificate_sent) { | |
156 | st->hand_state = TLS_ST_CR_COMP_CERT; | |
157 | return 1; | |
158 | } | |
159 | #endif | |
92760c21 MC |
160 | break; |
161 | ||
0f1e51ea | 162 | case TLS_ST_CR_CERT: |
b67cb09f | 163 | case TLS_ST_CR_COMP_CERT: |
2c5dfdc3 MC |
164 | if (mt == SSL3_MT_CERTIFICATE_VERIFY) { |
165 | st->hand_state = TLS_ST_CR_CERT_VRFY; | |
166 | return 1; | |
167 | } | |
168 | break; | |
169 | ||
170 | case TLS_ST_CR_CERT_VRFY: | |
0f1e51ea MC |
171 | if (mt == SSL3_MT_FINISHED) { |
172 | st->hand_state = TLS_ST_CR_FINISHED; | |
173 | return 1; | |
174 | } | |
175 | break; | |
cc2455bf MC |
176 | |
177 | case TLS_ST_OK: | |
178 | if (mt == SSL3_MT_NEWSESSION_TICKET) { | |
179 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
180 | return 1; | |
181 | } | |
e1c3de44 MC |
182 | if (mt == SSL3_MT_KEY_UPDATE) { |
183 | st->hand_state = TLS_ST_CR_KEY_UPDATE; | |
184 | return 1; | |
185 | } | |
9d75dce3 | 186 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { |
5c587fb6 | 187 | #if DTLS_MAX_VERSION_INTERNAL != DTLS1_2_VERSION |
407820c0 P |
188 | /* Restore digest for PHA before adding message.*/ |
189 | # error Internal DTLS version error | |
9d75dce3 | 190 | #endif |
38b051a1 TM |
191 | if (!SSL_CONNECTION_IS_DTLS(s) |
192 | && s->post_handshake_auth == SSL_PHA_EXT_SENT) { | |
9d75dce3 TS |
193 | s->post_handshake_auth = SSL_PHA_REQUESTED; |
194 | /* | |
195 | * In TLS, this is called before the message is added to the | |
196 | * digest. In DTLS, this is expected to be called after adding | |
197 | * to the digest. Either move the digest restore, or add the | |
198 | * message here after the swap, or do it after the clientFinished? | |
199 | */ | |
200 | if (!tls13_restore_handshake_digest_for_pha(s)) { | |
201 | /* SSLfatal() already called */ | |
202 | return 0; | |
203 | } | |
204 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
205 | return 1; | |
206 | } | |
207 | } | |
cc2455bf | 208 | break; |
0f1e51ea MC |
209 | } |
210 | ||
0f1e51ea | 211 | /* No valid transition found */ |
0f1e51ea MC |
212 | return 0; |
213 | } | |
214 | ||
61ae935a | 215 | /* |
8481f583 MC |
216 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed |
217 | * handshake state transitions when the client is reading messages from the | |
218 | * server. The message type that the server has sent is provided in |mt|. The | |
219 | * current state is in |s->statem.hand_state|. | |
61ae935a | 220 | * |
94ed2c67 MC |
221 | * Return values are 1 for success (transition allowed) and 0 on error |
222 | * (transition not allowed) | |
61ae935a | 223 | */ |
38b051a1 | 224 | int ossl_statem_client_read_transition(SSL_CONNECTION *s, int mt) |
61ae935a | 225 | { |
d6f1a6e9 | 226 | OSSL_STATEM *st = &s->statem; |
a455d0f6 | 227 | int ske_expected; |
61ae935a | 228 | |
0f1e51ea | 229 | /* |
3847d426 MC |
230 | * Note that after writing the first ClientHello we don't know what version |
231 | * we are going to negotiate yet, so we don't take this branch until later. | |
0f1e51ea | 232 | */ |
38b051a1 | 233 | if (SSL_CONNECTION_IS_TLS13(s)) { |
5abeaf35 MC |
234 | if (!ossl_statem_client13_read_transition(s, mt)) |
235 | goto err; | |
236 | return 1; | |
237 | } | |
0f1e51ea | 238 | |
a230b26e | 239 | switch (st->hand_state) { |
f3b3d7f0 RS |
240 | default: |
241 | break; | |
242 | ||
61ae935a MC |
243 | case TLS_ST_CW_CLNT_HELLO: |
244 | if (mt == SSL3_MT_SERVER_HELLO) { | |
245 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
246 | return 1; | |
247 | } | |
248 | ||
38b051a1 | 249 | if (SSL_CONNECTION_IS_DTLS(s)) { |
61ae935a MC |
250 | if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { |
251 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
252 | return 1; | |
253 | } | |
254 | } | |
255 | break; | |
256 | ||
d7f8783f | 257 | case TLS_ST_EARLY_DATA: |
4004ce5f MC |
258 | /* |
259 | * We've not actually selected TLSv1.3 yet, but we have sent early | |
260 | * data. The only thing allowed now is a ServerHello or a | |
261 | * HelloRetryRequest. | |
262 | */ | |
263 | if (mt == SSL3_MT_SERVER_HELLO) { | |
264 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
265 | return 1; | |
266 | } | |
4004ce5f MC |
267 | break; |
268 | ||
61ae935a MC |
269 | case TLS_ST_CR_SRVR_HELLO: |
270 | if (s->hit) { | |
aff8c126 | 271 | if (s->ext.ticket_expected) { |
61ae935a MC |
272 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
273 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
274 | return 1; | |
275 | } | |
276 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
277 | st->hand_state = TLS_ST_CR_CHANGE; | |
278 | return 1; | |
279 | } | |
280 | } else { | |
38b051a1 TM |
281 | if (SSL_CONNECTION_IS_DTLS(s) |
282 | && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
61ae935a MC |
283 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; |
284 | return 1; | |
ad3819c2 | 285 | } else if (s->version >= TLS1_VERSION |
aff8c126 RS |
286 | && s->ext.session_secret_cb != NULL |
287 | && s->session->ext.tick != NULL | |
a230b26e | 288 | && mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
ad3819c2 MC |
289 | /* |
290 | * Normally, we can tell if the server is resuming the session | |
291 | * from the session ID. EAP-FAST (RFC 4851), however, relies on | |
292 | * the next server message after the ServerHello to determine if | |
293 | * the server is resuming. | |
294 | */ | |
295 | s->hit = 1; | |
296 | st->hand_state = TLS_ST_CR_CHANGE; | |
297 | return 1; | |
555cbb32 | 298 | } else if (!(s->s3.tmp.new_cipher->algorithm_auth |
a230b26e | 299 | & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) { |
61ae935a MC |
300 | if (mt == SSL3_MT_CERTIFICATE) { |
301 | st->hand_state = TLS_ST_CR_CERT; | |
302 | return 1; | |
303 | } | |
304 | } else { | |
a455d0f6 | 305 | ske_expected = key_exchange_expected(s); |
a455d0f6 MC |
306 | /* SKE is optional for some PSK ciphersuites */ |
307 | if (ske_expected | |
555cbb32 | 308 | || ((s->s3.tmp.new_cipher->algorithm_mkey & SSL_PSK) |
a230b26e | 309 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { |
a455d0f6 MC |
310 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
311 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
312 | return 1; | |
313 | } | |
314 | } else if (mt == SSL3_MT_CERTIFICATE_REQUEST | |
a230b26e EK |
315 | && cert_req_allowed(s)) { |
316 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
317 | return 1; | |
a455d0f6 | 318 | } else if (mt == SSL3_MT_SERVER_DONE) { |
a230b26e EK |
319 | st->hand_state = TLS_ST_CR_SRVR_DONE; |
320 | return 1; | |
61ae935a MC |
321 | } |
322 | } | |
323 | } | |
324 | break; | |
325 | ||
326 | case TLS_ST_CR_CERT: | |
b67cb09f | 327 | case TLS_ST_CR_COMP_CERT: |
bb1aaab4 MC |
328 | /* |
329 | * The CertificateStatus message is optional even if | |
aff8c126 | 330 | * |ext.status_expected| is set |
bb1aaab4 | 331 | */ |
aff8c126 | 332 | if (s->ext.status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) { |
bb1aaab4 MC |
333 | st->hand_state = TLS_ST_CR_CERT_STATUS; |
334 | return 1; | |
a455d0f6 MC |
335 | } |
336 | /* Fall through */ | |
337 | ||
338 | case TLS_ST_CR_CERT_STATUS: | |
339 | ske_expected = key_exchange_expected(s); | |
a455d0f6 | 340 | /* SKE is optional for some PSK ciphersuites */ |
555cbb32 | 341 | if (ske_expected || ((s->s3.tmp.new_cipher->algorithm_mkey & SSL_PSK) |
a230b26e | 342 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { |
61ae935a MC |
343 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
344 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
345 | return 1; | |
61ae935a | 346 | } |
672f3337 | 347 | goto err; |
61ae935a | 348 | } |
a455d0f6 | 349 | /* Fall through */ |
61ae935a | 350 | |
a455d0f6 MC |
351 | case TLS_ST_CR_KEY_EXCH: |
352 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { | |
353 | if (cert_req_allowed(s)) { | |
61ae935a MC |
354 | st->hand_state = TLS_ST_CR_CERT_REQ; |
355 | return 1; | |
61ae935a | 356 | } |
672f3337 | 357 | goto err; |
61ae935a | 358 | } |
a455d0f6 | 359 | /* Fall through */ |
61ae935a MC |
360 | |
361 | case TLS_ST_CR_CERT_REQ: | |
362 | if (mt == SSL3_MT_SERVER_DONE) { | |
363 | st->hand_state = TLS_ST_CR_SRVR_DONE; | |
364 | return 1; | |
365 | } | |
366 | break; | |
367 | ||
368 | case TLS_ST_CW_FINISHED: | |
aff8c126 | 369 | if (s->ext.ticket_expected) { |
c45d6b2b DB |
370 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
371 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
372 | return 1; | |
373 | } | |
61ae935a MC |
374 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
375 | st->hand_state = TLS_ST_CR_CHANGE; | |
376 | return 1; | |
377 | } | |
378 | break; | |
379 | ||
380 | case TLS_ST_CR_SESSION_TICKET: | |
381 | if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
382 | st->hand_state = TLS_ST_CR_CHANGE; | |
383 | return 1; | |
384 | } | |
385 | break; | |
386 | ||
387 | case TLS_ST_CR_CHANGE: | |
388 | if (mt == SSL3_MT_FINISHED) { | |
389 | st->hand_state = TLS_ST_CR_FINISHED; | |
390 | return 1; | |
391 | } | |
392 | break; | |
c7f47786 MC |
393 | |
394 | case TLS_ST_OK: | |
4004ce5f | 395 | if (mt == SSL3_MT_HELLO_REQUEST) { |
c7f47786 MC |
396 | st->hand_state = TLS_ST_CR_HELLO_REQ; |
397 | return 1; | |
398 | } | |
399 | break; | |
61ae935a MC |
400 | } |
401 | ||
672f3337 | 402 | err: |
61ae935a | 403 | /* No valid transition found */ |
38b051a1 | 404 | if (SSL_CONNECTION_IS_DTLS(s) && mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
f20404fc MC |
405 | BIO *rbio; |
406 | ||
407 | /* | |
408 | * CCS messages don't have a message sequence number so this is probably | |
409 | * because of an out-of-order CCS. We'll just drop it. | |
410 | */ | |
411 | s->init_num = 0; | |
412 | s->rwstate = SSL_READING; | |
38b051a1 | 413 | rbio = SSL_get_rbio(SSL_CONNECTION_GET_SSL(s)); |
f20404fc MC |
414 | BIO_clear_retry_flags(rbio); |
415 | BIO_set_retry_read(rbio); | |
416 | return 0; | |
417 | } | |
c48ffbcc | 418 | SSLfatal(s, SSL3_AD_UNEXPECTED_MESSAGE, SSL_R_UNEXPECTED_MESSAGE); |
61ae935a MC |
419 | return 0; |
420 | } | |
421 | ||
422 | /* | |
0f1e51ea MC |
423 | * ossl_statem_client13_write_transition() works out what handshake state to |
424 | * move to next when the TLSv1.3 client is writing messages to be sent to the | |
425 | * server. | |
0f1e51ea | 426 | */ |
38b051a1 | 427 | static WRITE_TRAN ossl_statem_client13_write_transition(SSL_CONNECTION *s) |
0f1e51ea MC |
428 | { |
429 | OSSL_STATEM *st = &s->statem; | |
430 | ||
431 | /* | |
3847d426 MC |
432 | * Note: There are no cases for TLS_ST_BEFORE because we haven't negotiated |
433 | * TLSv1.3 yet at that point. They are handled by | |
434 | * ossl_statem_client_write_transition(). | |
0f1e51ea MC |
435 | */ |
436 | switch (st->hand_state) { | |
e43e6b19 TS |
437 | default: |
438 | /* Shouldn't happen */ | |
c48ffbcc | 439 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
e43e6b19 TS |
440 | return WRITE_TRAN_ERROR; |
441 | ||
9d75dce3 TS |
442 | case TLS_ST_CR_CERT_REQ: |
443 | if (s->post_handshake_auth == SSL_PHA_REQUESTED) { | |
b67cb09f TS |
444 | if (s->ext.compress_certificate_from_peer[0] != TLSEXT_comp_cert_none) |
445 | st->hand_state = TLS_ST_CW_COMP_CERT; | |
446 | else | |
447 | st->hand_state = TLS_ST_CW_CERT; | |
9d75dce3 TS |
448 | return WRITE_TRAN_CONTINUE; |
449 | } | |
1bf4cb0f MC |
450 | /* |
451 | * We should only get here if we received a CertificateRequest after | |
452 | * we already sent close_notify | |
453 | */ | |
454 | if (!ossl_assert((s->shutdown & SSL_SENT_SHUTDOWN) != 0)) { | |
455 | /* Shouldn't happen - same as default case */ | |
c48ffbcc | 456 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
1bf4cb0f MC |
457 | return WRITE_TRAN_ERROR; |
458 | } | |
459 | st->hand_state = TLS_ST_OK; | |
460 | return WRITE_TRAN_CONTINUE; | |
0f1e51ea | 461 | |
92760c21 | 462 | case TLS_ST_CR_FINISHED: |
ef6c191b MC |
463 | if (s->early_data_state == SSL_EARLY_DATA_WRITE_RETRY |
464 | || s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING) | |
d7f8783f | 465 | st->hand_state = TLS_ST_PENDING_EARLY_DATA_END; |
4d02f870 | 466 | else if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0 |
fc7129dc | 467 | && s->hello_retry_request == SSL_HRR_NONE) |
4d02f870 | 468 | st->hand_state = TLS_ST_CW_CHANGE; |
b67cb09f TS |
469 | else if (s->s3.tmp.cert_req == 0) |
470 | st->hand_state = TLS_ST_CW_FINISHED; | |
471 | else if (s->ext.compress_certificate_from_peer[0] != TLSEXT_comp_cert_none) | |
472 | st->hand_state = TLS_ST_CW_COMP_CERT; | |
564547e4 | 473 | else |
b67cb09f | 474 | st->hand_state = TLS_ST_CW_CERT; |
564547e4 MC |
475 | return WRITE_TRAN_CONTINUE; |
476 | ||
d7f8783f | 477 | case TLS_ST_PENDING_EARLY_DATA_END: |
ef6c191b MC |
478 | if (s->ext.early_data == SSL_EARLY_DATA_ACCEPTED) { |
479 | st->hand_state = TLS_ST_CW_END_OF_EARLY_DATA; | |
480 | return WRITE_TRAN_CONTINUE; | |
481 | } | |
482 | /* Fall through */ | |
483 | ||
484 | case TLS_ST_CW_END_OF_EARLY_DATA: | |
4d02f870 | 485 | case TLS_ST_CW_CHANGE: |
b67cb09f TS |
486 | if (s->s3.tmp.cert_req == 0) |
487 | st->hand_state = TLS_ST_CW_FINISHED; | |
488 | else if (s->ext.compress_certificate_from_peer[0] != TLSEXT_comp_cert_none) | |
489 | st->hand_state = TLS_ST_CW_COMP_CERT; | |
490 | else | |
491 | st->hand_state = TLS_ST_CW_CERT; | |
0f1e51ea MC |
492 | return WRITE_TRAN_CONTINUE; |
493 | ||
b67cb09f | 494 | case TLS_ST_CW_COMP_CERT: |
0f1e51ea MC |
495 | case TLS_ST_CW_CERT: |
496 | /* If a non-empty Certificate we also send CertificateVerify */ | |
555cbb32 | 497 | st->hand_state = (s->s3.tmp.cert_req == 1) ? TLS_ST_CW_CERT_VRFY |
92760c21 | 498 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
499 | return WRITE_TRAN_CONTINUE; |
500 | ||
501 | case TLS_ST_CW_CERT_VRFY: | |
0f1e51ea MC |
502 | st->hand_state = TLS_ST_CW_FINISHED; |
503 | return WRITE_TRAN_CONTINUE; | |
504 | ||
e1c3de44 | 505 | case TLS_ST_CR_KEY_UPDATE: |
9412b3ad | 506 | case TLS_ST_CW_KEY_UPDATE: |
cc2455bf | 507 | case TLS_ST_CR_SESSION_TICKET: |
0f1e51ea | 508 | case TLS_ST_CW_FINISHED: |
94ed2c67 | 509 | st->hand_state = TLS_ST_OK; |
94ed2c67 | 510 | return WRITE_TRAN_CONTINUE; |
cc2455bf MC |
511 | |
512 | case TLS_ST_OK: | |
9412b3ad MC |
513 | if (s->key_update != SSL_KEY_UPDATE_NONE) { |
514 | st->hand_state = TLS_ST_CW_KEY_UPDATE; | |
515 | return WRITE_TRAN_CONTINUE; | |
516 | } | |
517 | ||
518 | /* Try to read from the server instead */ | |
cc2455bf | 519 | return WRITE_TRAN_FINISHED; |
0f1e51ea MC |
520 | } |
521 | } | |
522 | ||
523 | /* | |
524 | * ossl_statem_client_write_transition() works out what handshake state to | |
525 | * move to next when the client is writing messages to be sent to the server. | |
61ae935a | 526 | */ |
38b051a1 | 527 | WRITE_TRAN ossl_statem_client_write_transition(SSL_CONNECTION *s) |
61ae935a | 528 | { |
d6f1a6e9 | 529 | OSSL_STATEM *st = &s->statem; |
61ae935a | 530 | |
0f1e51ea MC |
531 | /* |
532 | * Note that immediately before/after a ClientHello we don't know what | |
533 | * version we are going to negotiate yet, so we don't take this branch until | |
534 | * later | |
535 | */ | |
38b051a1 | 536 | if (SSL_CONNECTION_IS_TLS13(s)) |
0f1e51ea MC |
537 | return ossl_statem_client13_write_transition(s); |
538 | ||
a230b26e | 539 | switch (st->hand_state) { |
f3b3d7f0 RS |
540 | default: |
541 | /* Shouldn't happen */ | |
c48ffbcc | 542 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3b3d7f0 RS |
543 | return WRITE_TRAN_ERROR; |
544 | ||
a230b26e | 545 | case TLS_ST_OK: |
c7f47786 MC |
546 | if (!s->renegotiate) { |
547 | /* | |
548 | * We haven't requested a renegotiation ourselves so we must have | |
549 | * received a message from the server. Better read it. | |
550 | */ | |
551 | return WRITE_TRAN_FINISHED; | |
552 | } | |
018fcbec BE |
553 | /* Renegotiation */ |
554 | /* fall thru */ | |
a230b26e EK |
555 | case TLS_ST_BEFORE: |
556 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
557 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 558 | |
a230b26e | 559 | case TLS_ST_CW_CLNT_HELLO: |
49e7fe12 MC |
560 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING) { |
561 | /* | |
562 | * We are assuming this is a TLSv1.3 connection, although we haven't | |
563 | * actually selected a version yet. | |
564 | */ | |
066904cc MC |
565 | if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0) |
566 | st->hand_state = TLS_ST_CW_CHANGE; | |
567 | else | |
568 | st->hand_state = TLS_ST_EARLY_DATA; | |
49e7fe12 MC |
569 | return WRITE_TRAN_CONTINUE; |
570 | } | |
a230b26e EK |
571 | /* |
572 | * No transition at the end of writing because we don't know what | |
573 | * we will be sent | |
574 | */ | |
575 | return WRITE_TRAN_FINISHED; | |
61ae935a | 576 | |
597c51bc | 577 | case TLS_ST_CR_SRVR_HELLO: |
318d3c0e MC |
578 | /* |
579 | * We only get here in TLSv1.3. We just received an HRR, so issue a | |
580 | * CCS unless middlebox compat mode is off, or we already issued one | |
581 | * because we did early data. | |
582 | */ | |
583 | if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0 | |
584 | && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING) | |
585 | st->hand_state = TLS_ST_CW_CHANGE; | |
586 | else | |
587 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
a2b97bdf MC |
588 | return WRITE_TRAN_CONTINUE; |
589 | ||
d7f8783f | 590 | case TLS_ST_EARLY_DATA: |
4004ce5f MC |
591 | return WRITE_TRAN_FINISHED; |
592 | ||
a230b26e EK |
593 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
594 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
595 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 596 | |
a230b26e | 597 | case TLS_ST_CR_SRVR_DONE: |
555cbb32 | 598 | if (s->s3.tmp.cert_req) |
a230b26e EK |
599 | st->hand_state = TLS_ST_CW_CERT; |
600 | else | |
61ae935a | 601 | st->hand_state = TLS_ST_CW_KEY_EXCH; |
a230b26e | 602 | return WRITE_TRAN_CONTINUE; |
61ae935a | 603 | |
a230b26e EK |
604 | case TLS_ST_CW_CERT: |
605 | st->hand_state = TLS_ST_CW_KEY_EXCH; | |
606 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 607 | |
a230b26e EK |
608 | case TLS_ST_CW_KEY_EXCH: |
609 | /* | |
610 | * For TLS, cert_req is set to 2, so a cert chain of nothing is | |
611 | * sent, but no verify packet is sent | |
612 | */ | |
613 | /* | |
614 | * XXX: For now, we do not support client authentication in ECDH | |
615 | * cipher suites with ECDH (rather than ECDSA) certificates. We | |
616 | * need to skip the certificate verify message when client's | |
617 | * ECDH public key is sent inside the client certificate. | |
618 | */ | |
555cbb32 | 619 | if (s->s3.tmp.cert_req == 1) { |
a230b26e EK |
620 | st->hand_state = TLS_ST_CW_CERT_VRFY; |
621 | } else { | |
61ae935a | 622 | st->hand_state = TLS_ST_CW_CHANGE; |
a230b26e | 623 | } |
555cbb32 | 624 | if (s->s3.flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { |
a230b26e EK |
625 | st->hand_state = TLS_ST_CW_CHANGE; |
626 | } | |
627 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 628 | |
a230b26e EK |
629 | case TLS_ST_CW_CERT_VRFY: |
630 | st->hand_state = TLS_ST_CW_CHANGE; | |
631 | return WRITE_TRAN_CONTINUE; | |
632 | ||
633 | case TLS_ST_CW_CHANGE: | |
318d3c0e MC |
634 | if (s->hello_retry_request == SSL_HRR_PENDING) { |
635 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
636 | } else if (s->early_data_state == SSL_EARLY_DATA_CONNECTING) { | |
066904cc MC |
637 | st->hand_state = TLS_ST_EARLY_DATA; |
638 | } else { | |
61ae935a | 639 | #if defined(OPENSSL_NO_NEXTPROTONEG) |
a230b26e | 640 | st->hand_state = TLS_ST_CW_FINISHED; |
066904cc | 641 | #else |
38b051a1 | 642 | if (!SSL_CONNECTION_IS_DTLS(s) && s->s3.npn_seen) |
066904cc MC |
643 | st->hand_state = TLS_ST_CW_NEXT_PROTO; |
644 | else | |
645 | st->hand_state = TLS_ST_CW_FINISHED; | |
61ae935a | 646 | #endif |
066904cc | 647 | } |
a230b26e | 648 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
649 | |
650 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
a230b26e EK |
651 | case TLS_ST_CW_NEXT_PROTO: |
652 | st->hand_state = TLS_ST_CW_FINISHED; | |
653 | return WRITE_TRAN_CONTINUE; | |
61ae935a MC |
654 | #endif |
655 | ||
a230b26e EK |
656 | case TLS_ST_CW_FINISHED: |
657 | if (s->hit) { | |
658 | st->hand_state = TLS_ST_OK; | |
a230b26e EK |
659 | return WRITE_TRAN_CONTINUE; |
660 | } else { | |
661 | return WRITE_TRAN_FINISHED; | |
662 | } | |
61ae935a | 663 | |
a230b26e EK |
664 | case TLS_ST_CR_FINISHED: |
665 | if (s->hit) { | |
666 | st->hand_state = TLS_ST_CW_CHANGE; | |
667 | return WRITE_TRAN_CONTINUE; | |
668 | } else { | |
669 | st->hand_state = TLS_ST_OK; | |
a230b26e EK |
670 | return WRITE_TRAN_CONTINUE; |
671 | } | |
c7f47786 MC |
672 | |
673 | case TLS_ST_CR_HELLO_REQ: | |
674 | /* | |
675 | * If we can renegotiate now then do so, otherwise wait for a more | |
676 | * convenient time. | |
677 | */ | |
38b051a1 | 678 | if (ssl3_renegotiate_check(SSL_CONNECTION_GET_SSL(s), 1)) { |
c7f47786 | 679 | if (!tls_setup_handshake(s)) { |
f63a17d6 | 680 | /* SSLfatal() already called */ |
c7f47786 MC |
681 | return WRITE_TRAN_ERROR; |
682 | } | |
683 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
684 | return WRITE_TRAN_CONTINUE; | |
685 | } | |
686 | st->hand_state = TLS_ST_OK; | |
c7f47786 | 687 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
688 | } |
689 | } | |
690 | ||
691 | /* | |
692 | * Perform any pre work that needs to be done prior to sending a message from | |
693 | * the client to the server. | |
694 | */ | |
38b051a1 | 695 | WORK_STATE ossl_statem_client_pre_work(SSL_CONNECTION *s, WORK_STATE wst) |
61ae935a | 696 | { |
d6f1a6e9 | 697 | OSSL_STATEM *st = &s->statem; |
61ae935a | 698 | |
a230b26e | 699 | switch (st->hand_state) { |
f3b3d7f0 RS |
700 | default: |
701 | /* No pre work to be done */ | |
702 | break; | |
703 | ||
61ae935a MC |
704 | case TLS_ST_CW_CLNT_HELLO: |
705 | s->shutdown = 0; | |
38b051a1 | 706 | if (SSL_CONNECTION_IS_DTLS(s)) { |
61ae935a | 707 | /* every DTLS ClientHello resets Finished MAC */ |
2c4a056f | 708 | if (!ssl3_init_finished_mac(s)) { |
f63a17d6 | 709 | /* SSLfatal() already called */ |
2c4a056f MC |
710 | return WORK_ERROR; |
711 | } | |
2c50d7fb MC |
712 | } else if (s->ext.early_data == SSL_EARLY_DATA_REJECTED) { |
713 | /* | |
714 | * This must be a second ClientHello after an HRR following an | |
715 | * earlier rejected attempt to send early data. Since we were | |
716 | * previously encrypting the early data we now need to reset the | |
717 | * write record layer in order to write in plaintext again. | |
718 | */ | |
719 | if (!ssl_set_new_record_layer(s, | |
720 | TLS_ANY_VERSION, | |
721 | OSSL_RECORD_DIRECTION_WRITE, | |
722 | OSSL_RECORD_PROTECTION_LEVEL_NONE, | |
3f9175c7 MC |
723 | NULL, 0, NULL, 0, NULL, 0, NULL, 0, |
724 | NULL, 0, NID_undef, NULL, NULL, | |
725 | NULL)) { | |
2c50d7fb MC |
726 | /* SSLfatal already called */ |
727 | return WORK_ERROR; | |
728 | } | |
61ae935a MC |
729 | } |
730 | break; | |
731 | ||
61ae935a | 732 | case TLS_ST_CW_CHANGE: |
38b051a1 | 733 | if (SSL_CONNECTION_IS_DTLS(s)) { |
61ae935a MC |
734 | if (s->hit) { |
735 | /* | |
736 | * We're into the last flight so we don't retransmit these | |
737 | * messages unless we need to. | |
738 | */ | |
739 | st->use_timer = 0; | |
740 | } | |
741 | #ifndef OPENSSL_NO_SCTP | |
38b051a1 | 742 | if (BIO_dgram_is_sctp(SSL_get_wbio(SSL_CONNECTION_GET_SSL(s)))) { |
a2c2e000 | 743 | /* Calls SSLfatal() as required */ |
61ae935a | 744 | return dtls_wait_for_dry(s); |
a2c2e000 | 745 | } |
61ae935a MC |
746 | #endif |
747 | } | |
f3b3d7f0 | 748 | break; |
61ae935a | 749 | |
d7f8783f | 750 | case TLS_ST_PENDING_EARLY_DATA_END: |
ef6c191b MC |
751 | /* |
752 | * If we've been called by SSL_do_handshake()/SSL_write(), or we did not | |
753 | * attempt to write early data before calling SSL_read() then we press | |
754 | * on with the handshake. Otherwise we pause here. | |
755 | */ | |
756 | if (s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING | |
757 | || s->early_data_state == SSL_EARLY_DATA_NONE) | |
758 | return WORK_FINISHED_CONTINUE; | |
759 | /* Fall through */ | |
760 | ||
761 | case TLS_ST_EARLY_DATA: | |
2a8db717 MC |
762 | return tls_finish_handshake(s, wst, 0, 1); |
763 | ||
61ae935a | 764 | case TLS_ST_OK: |
a2c2e000 | 765 | /* Calls SSLfatal() as required */ |
2a8db717 | 766 | return tls_finish_handshake(s, wst, 1, 1); |
61ae935a MC |
767 | } |
768 | ||
769 | return WORK_FINISHED_CONTINUE; | |
770 | } | |
771 | ||
772 | /* | |
773 | * Perform any work that needs to be done after sending a message from the | |
774 | * client to the server. | |
775 | */ | |
38b051a1 | 776 | WORK_STATE ossl_statem_client_post_work(SSL_CONNECTION *s, WORK_STATE wst) |
61ae935a | 777 | { |
d6f1a6e9 | 778 | OSSL_STATEM *st = &s->statem; |
38b051a1 | 779 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
61ae935a MC |
780 | |
781 | s->init_num = 0; | |
782 | ||
a230b26e | 783 | switch (st->hand_state) { |
f3b3d7f0 RS |
784 | default: |
785 | /* No post work to be done */ | |
786 | break; | |
787 | ||
61ae935a | 788 | case TLS_ST_CW_CLNT_HELLO: |
6cb42265 | 789 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING |
5cc807da | 790 | && s->max_early_data > 0) { |
6cb42265 MC |
791 | /* |
792 | * We haven't selected TLSv1.3 yet so we don't call the change | |
793 | * cipher state function associated with the SSL_METHOD. Instead | |
794 | * we call tls13_change_cipher_state() directly. | |
795 | */ | |
5cc807da | 796 | if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) == 0) { |
5cc807da MC |
797 | if (!tls13_change_cipher_state(s, |
798 | SSL3_CC_EARLY | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { | |
799 | /* SSLfatal() already called */ | |
800 | return WORK_ERROR; | |
801 | } | |
a2c2e000 | 802 | } |
5cc807da MC |
803 | /* else we're in compat mode so we delay flushing until after CCS */ |
804 | } else if (!statem_flush(s)) { | |
805 | return WORK_MORE_A; | |
806 | } | |
807 | ||
38b051a1 | 808 | if (SSL_CONNECTION_IS_DTLS(s)) { |
5cc807da MC |
809 | /* Treat the next message as the first packet */ |
810 | s->first_packet = 1; | |
6cb42265 | 811 | } |
61ae935a MC |
812 | break; |
813 | ||
814 | case TLS_ST_CW_KEY_EXCH: | |
a2c2e000 MC |
815 | if (tls_client_key_exchange_post_work(s) == 0) { |
816 | /* SSLfatal() already called */ | |
61ae935a | 817 | return WORK_ERROR; |
a2c2e000 | 818 | } |
61ae935a MC |
819 | break; |
820 | ||
821 | case TLS_ST_CW_CHANGE: | |
38b051a1 TM |
822 | if (SSL_CONNECTION_IS_TLS13(s) |
823 | || s->hello_retry_request == SSL_HRR_PENDING) | |
4d02f870 | 824 | break; |
066904cc MC |
825 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING |
826 | && s->max_early_data > 0) { | |
827 | /* | |
828 | * We haven't selected TLSv1.3 yet so we don't call the change | |
829 | * cipher state function associated with the SSL_METHOD. Instead | |
830 | * we call tls13_change_cipher_state() directly. | |
831 | */ | |
832 | if (!tls13_change_cipher_state(s, | |
833 | SSL3_CC_EARLY | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
834 | return WORK_ERROR; | |
835 | break; | |
836 | } | |
555cbb32 | 837 | s->session->cipher = s->s3.tmp.new_cipher; |
61ae935a MC |
838 | #ifdef OPENSSL_NO_COMP |
839 | s->session->compress_meth = 0; | |
840 | #else | |
555cbb32 | 841 | if (s->s3.tmp.new_compression == NULL) |
61ae935a MC |
842 | s->session->compress_meth = 0; |
843 | else | |
555cbb32 | 844 | s->session->compress_meth = s->s3.tmp.new_compression->id; |
61ae935a | 845 | #endif |
38b051a1 | 846 | if (!ssl->method->ssl3_enc->setup_key_block(s)) { |
a2c2e000 | 847 | /* SSLfatal() already called */ |
61ae935a | 848 | return WORK_ERROR; |
a2c2e000 | 849 | } |
61ae935a | 850 | |
38b051a1 | 851 | if (!ssl->method->ssl3_enc->change_cipher_state(s, |
a2c2e000 MC |
852 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { |
853 | /* SSLfatal() already called */ | |
61ae935a | 854 | return WORK_ERROR; |
a2c2e000 | 855 | } |
61ae935a | 856 | |
38b051a1 | 857 | if (SSL_CONNECTION_IS_DTLS(s)) { |
61ae935a MC |
858 | #ifndef OPENSSL_NO_SCTP |
859 | if (s->hit) { | |
860 | /* | |
861 | * Change to new shared key of SCTP-Auth, will be ignored if | |
862 | * no SCTP used. | |
863 | */ | |
38b051a1 | 864 | BIO_ctrl(SSL_get_wbio(ssl), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, |
61ae935a MC |
865 | 0, NULL); |
866 | } | |
867 | #endif | |
868 | ||
b92fc4ae | 869 | dtls1_increment_epoch(s, SSL3_CC_WRITE); |
61ae935a MC |
870 | } |
871 | break; | |
872 | ||
873 | case TLS_ST_CW_FINISHED: | |
874 | #ifndef OPENSSL_NO_SCTP | |
38b051a1 | 875 | if (wst == WORK_MORE_A && SSL_CONNECTION_IS_DTLS(s) && s->hit == 0) { |
61ae935a MC |
876 | /* |
877 | * Change to new shared key of SCTP-Auth, will be ignored if | |
878 | * no SCTP used. | |
879 | */ | |
38b051a1 | 880 | BIO_ctrl(SSL_get_wbio(ssl), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, |
61ae935a MC |
881 | 0, NULL); |
882 | } | |
883 | #endif | |
884 | if (statem_flush(s) != 1) | |
885 | return WORK_MORE_B; | |
92760c21 | 886 | |
38b051a1 | 887 | if (SSL_CONNECTION_IS_TLS13(s)) { |
9d75dce3 | 888 | if (!tls13_save_handshake_digest_for_pha(s)) { |
a2c2e000 MC |
889 | /* SSLfatal() already called */ |
890 | return WORK_ERROR; | |
891 | } | |
9d75dce3 | 892 | if (s->post_handshake_auth != SSL_PHA_REQUESTED) { |
38b051a1 | 893 | if (!ssl->method->ssl3_enc->change_cipher_state(s, |
9d75dce3 TS |
894 | SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { |
895 | /* SSLfatal() already called */ | |
896 | return WORK_ERROR; | |
897 | } | |
898 | } | |
92760c21 | 899 | } |
61ae935a | 900 | break; |
9412b3ad MC |
901 | |
902 | case TLS_ST_CW_KEY_UPDATE: | |
903 | if (statem_flush(s) != 1) | |
904 | return WORK_MORE_A; | |
a2c2e000 MC |
905 | if (!tls13_update_key(s, 1)) { |
906 | /* SSLfatal() already called */ | |
57389a32 | 907 | return WORK_ERROR; |
a2c2e000 | 908 | } |
9412b3ad | 909 | break; |
61ae935a MC |
910 | } |
911 | ||
912 | return WORK_FINISHED_CONTINUE; | |
913 | } | |
914 | ||
915 | /* | |
6392fb8e MC |
916 | * Get the message construction function and message type for sending from the |
917 | * client | |
61ae935a MC |
918 | * |
919 | * Valid return values are: | |
920 | * 1: Success | |
921 | * 0: Error | |
922 | */ | |
38b051a1 | 923 | int ossl_statem_client_construct_message(SSL_CONNECTION *s, |
a15c953f | 924 | confunc_f *confunc, int *mt) |
61ae935a | 925 | { |
d6f1a6e9 | 926 | OSSL_STATEM *st = &s->statem; |
61ae935a | 927 | |
4a01c59f MC |
928 | switch (st->hand_state) { |
929 | default: | |
930 | /* Shouldn't happen */ | |
c48ffbcc | 931 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_HANDSHAKE_STATE); |
4a01c59f MC |
932 | return 0; |
933 | ||
934 | case TLS_ST_CW_CHANGE: | |
38b051a1 | 935 | if (SSL_CONNECTION_IS_DTLS(s)) |
6392fb8e | 936 | *confunc = dtls_construct_change_cipher_spec; |
4a01c59f | 937 | else |
6392fb8e MC |
938 | *confunc = tls_construct_change_cipher_spec; |
939 | *mt = SSL3_MT_CHANGE_CIPHER_SPEC; | |
4a01c59f MC |
940 | break; |
941 | ||
942 | case TLS_ST_CW_CLNT_HELLO: | |
6392fb8e MC |
943 | *confunc = tls_construct_client_hello; |
944 | *mt = SSL3_MT_CLIENT_HELLO; | |
4a01c59f MC |
945 | break; |
946 | ||
ef6c191b MC |
947 | case TLS_ST_CW_END_OF_EARLY_DATA: |
948 | *confunc = tls_construct_end_of_early_data; | |
949 | *mt = SSL3_MT_END_OF_EARLY_DATA; | |
950 | break; | |
951 | ||
952 | case TLS_ST_PENDING_EARLY_DATA_END: | |
953 | *confunc = NULL; | |
954 | *mt = SSL3_MT_DUMMY; | |
955 | break; | |
956 | ||
4a01c59f | 957 | case TLS_ST_CW_CERT: |
6392fb8e MC |
958 | *confunc = tls_construct_client_certificate; |
959 | *mt = SSL3_MT_CERTIFICATE; | |
4a01c59f MC |
960 | break; |
961 | ||
b67cb09f TS |
962 | #ifndef OPENSSL_NO_COMP_ALG |
963 | case TLS_ST_CW_COMP_CERT: | |
964 | *confunc = tls_construct_client_compressed_certificate; | |
965 | *mt = SSL3_MT_COMPRESSED_CERTIFICATE; | |
966 | break; | |
967 | #endif | |
968 | ||
4a01c59f | 969 | case TLS_ST_CW_KEY_EXCH: |
6392fb8e MC |
970 | *confunc = tls_construct_client_key_exchange; |
971 | *mt = SSL3_MT_CLIENT_KEY_EXCHANGE; | |
4a01c59f MC |
972 | break; |
973 | ||
974 | case TLS_ST_CW_CERT_VRFY: | |
d8bc1399 | 975 | *confunc = tls_construct_cert_verify; |
6392fb8e | 976 | *mt = SSL3_MT_CERTIFICATE_VERIFY; |
4a01c59f | 977 | break; |
61ae935a MC |
978 | |
979 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
4a01c59f | 980 | case TLS_ST_CW_NEXT_PROTO: |
6392fb8e MC |
981 | *confunc = tls_construct_next_proto; |
982 | *mt = SSL3_MT_NEXT_PROTO; | |
4a01c59f | 983 | break; |
61ae935a | 984 | #endif |
4a01c59f | 985 | case TLS_ST_CW_FINISHED: |
6392fb8e MC |
986 | *confunc = tls_construct_finished; |
987 | *mt = SSL3_MT_FINISHED; | |
4a01c59f | 988 | break; |
9412b3ad MC |
989 | |
990 | case TLS_ST_CW_KEY_UPDATE: | |
991 | *confunc = tls_construct_key_update; | |
992 | *mt = SSL3_MT_KEY_UPDATE; | |
993 | break; | |
4a01c59f | 994 | } |
5923ad4b | 995 | |
5923ad4b | 996 | return 1; |
61ae935a MC |
997 | } |
998 | ||
999 | /* | |
1000 | * Returns the maximum allowed length for the current message that we are | |
1001 | * reading. Excludes the message header. | |
1002 | */ | |
38b051a1 | 1003 | size_t ossl_statem_client_max_message_size(SSL_CONNECTION *s) |
61ae935a | 1004 | { |
d6f1a6e9 | 1005 | OSSL_STATEM *st = &s->statem; |
61ae935a | 1006 | |
a230b26e | 1007 | switch (st->hand_state) { |
f3b3d7f0 RS |
1008 | default: |
1009 | /* Shouldn't happen */ | |
1010 | return 0; | |
1011 | ||
a230b26e EK |
1012 | case TLS_ST_CR_SRVR_HELLO: |
1013 | return SERVER_HELLO_MAX_LENGTH; | |
61ae935a | 1014 | |
a230b26e EK |
1015 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
1016 | return HELLO_VERIFY_REQUEST_MAX_LENGTH; | |
61ae935a | 1017 | |
b67cb09f | 1018 | case TLS_ST_CR_COMP_CERT: |
a230b26e EK |
1019 | case TLS_ST_CR_CERT: |
1020 | return s->max_cert_list; | |
61ae935a | 1021 | |
2c5dfdc3 MC |
1022 | case TLS_ST_CR_CERT_VRFY: |
1023 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
1024 | ||
a230b26e EK |
1025 | case TLS_ST_CR_CERT_STATUS: |
1026 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 1027 | |
a230b26e EK |
1028 | case TLS_ST_CR_KEY_EXCH: |
1029 | return SERVER_KEY_EXCH_MAX_LENGTH; | |
61ae935a | 1030 | |
a230b26e EK |
1031 | case TLS_ST_CR_CERT_REQ: |
1032 | /* | |
1033 | * Set to s->max_cert_list for compatibility with previous releases. In | |
1034 | * practice these messages can get quite long if servers are configured | |
1035 | * to provide a long list of acceptable CAs | |
1036 | */ | |
1037 | return s->max_cert_list; | |
61ae935a | 1038 | |
a230b26e EK |
1039 | case TLS_ST_CR_SRVR_DONE: |
1040 | return SERVER_HELLO_DONE_MAX_LENGTH; | |
61ae935a | 1041 | |
a230b26e EK |
1042 | case TLS_ST_CR_CHANGE: |
1043 | if (s->version == DTLS1_BAD_VER) | |
1044 | return 3; | |
1045 | return CCS_MAX_LENGTH; | |
61ae935a | 1046 | |
a230b26e | 1047 | case TLS_ST_CR_SESSION_TICKET: |
38b051a1 TM |
1048 | return (SSL_CONNECTION_IS_TLS13(s)) ? SESSION_TICKET_MAX_LENGTH_TLS13 |
1049 | : SESSION_TICKET_MAX_LENGTH_TLS12; | |
61ae935a | 1050 | |
a230b26e EK |
1051 | case TLS_ST_CR_FINISHED: |
1052 | return FINISHED_MAX_LENGTH; | |
e46f2334 MC |
1053 | |
1054 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
1055 | return ENCRYPTED_EXTENSIONS_MAX_LENGTH; | |
e1c3de44 MC |
1056 | |
1057 | case TLS_ST_CR_KEY_UPDATE: | |
1058 | return KEY_UPDATE_MAX_LENGTH; | |
61ae935a | 1059 | } |
61ae935a MC |
1060 | } |
1061 | ||
1062 | /* | |
0c3eb279 | 1063 | * Process a message that the client has received from the server. |
61ae935a | 1064 | */ |
38b051a1 TM |
1065 | MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL_CONNECTION *s, |
1066 | PACKET *pkt) | |
61ae935a | 1067 | { |
d6f1a6e9 | 1068 | OSSL_STATEM *st = &s->statem; |
61ae935a | 1069 | |
a230b26e | 1070 | switch (st->hand_state) { |
f3b3d7f0 RS |
1071 | default: |
1072 | /* Shouldn't happen */ | |
c48ffbcc | 1073 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3b3d7f0 RS |
1074 | return MSG_PROCESS_ERROR; |
1075 | ||
a230b26e EK |
1076 | case TLS_ST_CR_SRVR_HELLO: |
1077 | return tls_process_server_hello(s, pkt); | |
61ae935a | 1078 | |
a230b26e EK |
1079 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
1080 | return dtls_process_hello_verify(s, pkt); | |
61ae935a | 1081 | |
a230b26e EK |
1082 | case TLS_ST_CR_CERT: |
1083 | return tls_process_server_certificate(s, pkt); | |
61ae935a | 1084 | |
b67cb09f TS |
1085 | #ifndef OPENSSL_NO_COMP_ALG |
1086 | case TLS_ST_CR_COMP_CERT: | |
1087 | return tls_process_server_compressed_certificate(s, pkt); | |
1088 | #endif | |
1089 | ||
2c5dfdc3 MC |
1090 | case TLS_ST_CR_CERT_VRFY: |
1091 | return tls_process_cert_verify(s, pkt); | |
1092 | ||
a230b26e EK |
1093 | case TLS_ST_CR_CERT_STATUS: |
1094 | return tls_process_cert_status(s, pkt); | |
61ae935a | 1095 | |
a230b26e EK |
1096 | case TLS_ST_CR_KEY_EXCH: |
1097 | return tls_process_key_exchange(s, pkt); | |
61ae935a | 1098 | |
a230b26e EK |
1099 | case TLS_ST_CR_CERT_REQ: |
1100 | return tls_process_certificate_request(s, pkt); | |
61ae935a | 1101 | |
a230b26e EK |
1102 | case TLS_ST_CR_SRVR_DONE: |
1103 | return tls_process_server_done(s, pkt); | |
61ae935a | 1104 | |
a230b26e EK |
1105 | case TLS_ST_CR_CHANGE: |
1106 | return tls_process_change_cipher_spec(s, pkt); | |
61ae935a | 1107 | |
a230b26e EK |
1108 | case TLS_ST_CR_SESSION_TICKET: |
1109 | return tls_process_new_session_ticket(s, pkt); | |
61ae935a | 1110 | |
a230b26e EK |
1111 | case TLS_ST_CR_FINISHED: |
1112 | return tls_process_finished(s, pkt); | |
e46f2334 | 1113 | |
c7f47786 MC |
1114 | case TLS_ST_CR_HELLO_REQ: |
1115 | return tls_process_hello_req(s, pkt); | |
1116 | ||
e46f2334 MC |
1117 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: |
1118 | return tls_process_encrypted_extensions(s, pkt); | |
e1c3de44 MC |
1119 | |
1120 | case TLS_ST_CR_KEY_UPDATE: | |
1121 | return tls_process_key_update(s, pkt); | |
61ae935a | 1122 | } |
61ae935a MC |
1123 | } |
1124 | ||
1125 | /* | |
1126 | * Perform any further processing required following the receipt of a message | |
1127 | * from the server | |
1128 | */ | |
38b051a1 TM |
1129 | WORK_STATE ossl_statem_client_post_process_message(SSL_CONNECTION *s, |
1130 | WORK_STATE wst) | |
61ae935a | 1131 | { |
d6f1a6e9 | 1132 | OSSL_STATEM *st = &s->statem; |
61ae935a | 1133 | |
a230b26e | 1134 | switch (st->hand_state) { |
f3b3d7f0 RS |
1135 | default: |
1136 | /* Shouldn't happen */ | |
c48ffbcc | 1137 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3b3d7f0 RS |
1138 | return WORK_ERROR; |
1139 | ||
0c3eb279 | 1140 | case TLS_ST_CR_CERT: |
b67cb09f | 1141 | case TLS_ST_CR_COMP_CERT: |
0c3eb279 DDO |
1142 | return tls_post_process_server_certificate(s, wst); |
1143 | ||
e4562014 | 1144 | case TLS_ST_CR_CERT_VRFY: |
05c4f1d5 MC |
1145 | case TLS_ST_CR_CERT_REQ: |
1146 | return tls_prepare_client_certificate(s, wst); | |
61ae935a | 1147 | } |
61ae935a MC |
1148 | } |
1149 | ||
67ec6d2b | 1150 | CON_FUNC_RETURN tls_construct_client_hello(SSL_CONNECTION *s, WPACKET *pkt) |
0f113f3e | 1151 | { |
2c7b4dbc | 1152 | unsigned char *p; |
ec60ccc1 MC |
1153 | size_t sess_id_len; |
1154 | int i, protverr; | |
09b6c2ef | 1155 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
1156 | SSL_COMP *comp; |
1157 | #endif | |
b9908bf9 | 1158 | SSL_SESSION *sess = s->session; |
a5816a5a | 1159 | unsigned char *session_id; |
38b051a1 | 1160 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
0f113f3e | 1161 | |
b9908bf9 | 1162 | /* Work out what SSL/TLS/DTLS version to use */ |
4fa52141 VD |
1163 | protverr = ssl_set_client_hello_version(s); |
1164 | if (protverr != 0) { | |
c48ffbcc | 1165 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, protverr); |
67ec6d2b | 1166 | return CON_FUNC_ERROR; |
4fa52141 | 1167 | } |
0f113f3e | 1168 | |
e586eac8 | 1169 | if (sess == NULL |
4fd12788 | 1170 | || !ssl_version_supported(s, sess->ssl_version, NULL) |
e586eac8 | 1171 | || !SSL_SESSION_is_resumable(sess)) { |
fc7129dc MC |
1172 | if (s->hello_retry_request == SSL_HRR_NONE |
1173 | && !ssl_get_new_session(s, 0)) { | |
f63a17d6 | 1174 | /* SSLfatal() already called */ |
67ec6d2b | 1175 | return CON_FUNC_ERROR; |
f63a17d6 | 1176 | } |
b9908bf9 MC |
1177 | } |
1178 | /* else use the pre-loaded session */ | |
0f113f3e | 1179 | |
555cbb32 | 1180 | p = s->s3.client_random; |
0f113f3e | 1181 | |
b9908bf9 MC |
1182 | /* |
1183 | * for DTLS if client_random is initialized, reuse it, we are | |
1184 | * required to use same upon reply to HelloVerify | |
1185 | */ | |
38b051a1 | 1186 | if (SSL_CONNECTION_IS_DTLS(s)) { |
b9908bf9 MC |
1187 | size_t idx; |
1188 | i = 1; | |
555cbb32 | 1189 | for (idx = 0; idx < sizeof(s->s3.client_random); idx++) { |
b9908bf9 MC |
1190 | if (p[idx]) { |
1191 | i = 0; | |
1192 | break; | |
0f113f3e | 1193 | } |
0f113f3e | 1194 | } |
751b26b1 | 1195 | } else { |
fc7129dc | 1196 | i = (s->hello_retry_request == SSL_HRR_NONE); |
751b26b1 | 1197 | } |
0f113f3e | 1198 | |
555cbb32 | 1199 | if (i && ssl_fill_hello_random(s, 0, p, sizeof(s->s3.client_random), |
f63a17d6 | 1200 | DOWNGRADE_NONE) <= 0) { |
c48ffbcc | 1201 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1202 | return CON_FUNC_ERROR; |
f63a17d6 | 1203 | } |
b9908bf9 | 1204 | |
b9908bf9 MC |
1205 | /*- |
1206 | * version indicates the negotiated version: for example from | |
1207 | * an SSLv2/v3 compatible client hello). The client_version | |
1208 | * field is the maximum version we permit and it is also | |
1209 | * used in RSA encrypted premaster secrets. Some servers can | |
1210 | * choke if we initially report a higher version then | |
1211 | * renegotiate to a lower one in the premaster secret. This | |
1212 | * didn't happen with TLS 1.0 as most servers supported it | |
1213 | * but it can with TLS 1.1 or later if the server only supports | |
1214 | * 1.0. | |
1215 | * | |
1216 | * Possible scenario with previous logic: | |
1217 | * 1. Client hello indicates TLS 1.2 | |
1218 | * 2. Server hello says TLS 1.0 | |
1219 | * 3. RSA encrypted premaster secret uses 1.2. | |
8483a003 | 1220 | * 4. Handshake proceeds using TLS 1.0. |
b9908bf9 MC |
1221 | * 5. Server sends hello request to renegotiate. |
1222 | * 6. Client hello indicates TLS v1.0 as we now | |
1223 | * know that is maximum server supports. | |
1224 | * 7. Server chokes on RSA encrypted premaster secret | |
1225 | * containing version 1.0. | |
1226 | * | |
1227 | * For interoperability it should be OK to always use the | |
1228 | * maximum version we support in client hello and then rely | |
1229 | * on the checking of version to ensure the servers isn't | |
1230 | * being inconsistent: for example initially negotiating with | |
1231 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
1232 | * client_version in client hello and not resetting it to | |
1233 | * the negotiated version. | |
cd998837 MC |
1234 | * |
1235 | * For TLS 1.3 we always set the ClientHello version to 1.2 and rely on the | |
16bce0e0 | 1236 | * supported_versions extension for the real supported versions. |
b9908bf9 | 1237 | */ |
7acb8b64 | 1238 | if (!WPACKET_put_bytes_u16(pkt, s->client_version) |
555cbb32 | 1239 | || !WPACKET_memcpy(pkt, s->s3.client_random, SSL3_RANDOM_SIZE)) { |
c48ffbcc | 1240 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1241 | return CON_FUNC_ERROR; |
2c7b4dbc | 1242 | } |
b9908bf9 MC |
1243 | |
1244 | /* Session ID */ | |
a5816a5a MC |
1245 | session_id = s->session->session_id; |
1246 | if (s->new_session || s->session->ssl_version == TLS1_3_VERSION) { | |
1247 | if (s->version == TLS1_3_VERSION | |
1248 | && (s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0) { | |
1249 | sess_id_len = sizeof(s->tmp_session_id); | |
1250 | s->tmp_session_id_len = sess_id_len; | |
1251 | session_id = s->tmp_session_id; | |
fc7129dc | 1252 | if (s->hello_retry_request == SSL_HRR_NONE |
38b051a1 | 1253 | && RAND_bytes_ex(sctx->libctx, s->tmp_session_id, |
0f8815aa | 1254 | sess_id_len, 0) <= 0) { |
c48ffbcc | 1255 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1256 | return CON_FUNC_ERROR; |
a5816a5a MC |
1257 | } |
1258 | } else { | |
1259 | sess_id_len = 0; | |
1260 | } | |
1261 | } else { | |
dee0cc10 | 1262 | assert(s->session->session_id_length <= sizeof(s->session->session_id)); |
ec60ccc1 | 1263 | sess_id_len = s->session->session_id_length; |
a5816a5a MC |
1264 | if (s->version == TLS1_3_VERSION) { |
1265 | s->tmp_session_id_len = sess_id_len; | |
1266 | memcpy(s->tmp_session_id, s->session->session_id, sess_id_len); | |
1267 | } | |
1268 | } | |
dee0cc10 | 1269 | if (!WPACKET_start_sub_packet_u8(pkt) |
a5816a5a | 1270 | || (sess_id_len != 0 && !WPACKET_memcpy(pkt, session_id, |
ec60ccc1 | 1271 | sess_id_len)) |
7cea05dc | 1272 | || !WPACKET_close(pkt)) { |
c48ffbcc | 1273 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1274 | return CON_FUNC_ERROR; |
b9908bf9 | 1275 | } |
0f113f3e | 1276 | |
b9908bf9 | 1277 | /* cookie stuff for DTLS */ |
38b051a1 | 1278 | if (SSL_CONNECTION_IS_DTLS(s)) { |
2c7b4dbc | 1279 | if (s->d1->cookie_len > sizeof(s->d1->cookie) |
7cea05dc | 1280 | || !WPACKET_sub_memcpy_u8(pkt, s->d1->cookie, |
b2b3024e | 1281 | s->d1->cookie_len)) { |
c48ffbcc | 1282 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1283 | return CON_FUNC_ERROR; |
0f113f3e | 1284 | } |
b9908bf9 MC |
1285 | } |
1286 | ||
1287 | /* Ciphers supported */ | |
7cea05dc | 1288 | if (!WPACKET_start_sub_packet_u16(pkt)) { |
c48ffbcc | 1289 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1290 | return CON_FUNC_ERROR; |
2c7b4dbc | 1291 | } |
635c8f77 | 1292 | |
38b051a1 TM |
1293 | if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(SSL_CONNECTION_GET_SSL(s)), |
1294 | pkt)) { | |
f63a17d6 | 1295 | /* SSLfatal() already called */ |
67ec6d2b | 1296 | return CON_FUNC_ERROR; |
f63a17d6 | 1297 | } |
7cea05dc | 1298 | if (!WPACKET_close(pkt)) { |
c48ffbcc | 1299 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1300 | return CON_FUNC_ERROR; |
b9908bf9 | 1301 | } |
0f113f3e | 1302 | |
b9908bf9 | 1303 | /* COMPRESSION */ |
7cea05dc | 1304 | if (!WPACKET_start_sub_packet_u8(pkt)) { |
c48ffbcc | 1305 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1306 | return CON_FUNC_ERROR; |
2c7b4dbc MC |
1307 | } |
1308 | #ifndef OPENSSL_NO_COMP | |
c19602b5 | 1309 | if (ssl_allow_compression(s) |
38b051a1 TM |
1310 | && sctx->comp_methods |
1311 | && (SSL_CONNECTION_IS_DTLS(s) | |
1312 | || s->s3.tmp.max_ver < TLS1_3_VERSION)) { | |
1313 | int compnum = sk_SSL_COMP_num(sctx->comp_methods); | |
2c7b4dbc | 1314 | for (i = 0; i < compnum; i++) { |
38b051a1 | 1315 | comp = sk_SSL_COMP_value(sctx->comp_methods, i); |
7cea05dc | 1316 | if (!WPACKET_put_bytes_u8(pkt, comp->id)) { |
c48ffbcc | 1317 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1318 | return CON_FUNC_ERROR; |
2c7b4dbc MC |
1319 | } |
1320 | } | |
b9908bf9 | 1321 | } |
09b6c2ef | 1322 | #endif |
2c7b4dbc | 1323 | /* Add the NULL method */ |
7cea05dc | 1324 | if (!WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_close(pkt)) { |
c48ffbcc | 1325 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1326 | return CON_FUNC_ERROR; |
2c7b4dbc | 1327 | } |
761772d7 | 1328 | |
b9908bf9 | 1329 | /* TLS extensions */ |
f63a17d6 MC |
1330 | if (!tls_construct_extensions(s, pkt, SSL_EXT_CLIENT_HELLO, NULL, 0)) { |
1331 | /* SSLfatal() already called */ | |
67ec6d2b | 1332 | return CON_FUNC_ERROR; |
b9908bf9 | 1333 | } |
0f113f3e | 1334 | |
67ec6d2b | 1335 | return CON_FUNC_SUCCESS; |
0f113f3e | 1336 | } |
d02b48c6 | 1337 | |
38b051a1 | 1338 | MSG_PROCESS_RETURN dtls_process_hello_verify(SSL_CONNECTION *s, PACKET *pkt) |
8ba708e5 | 1339 | { |
cb150cbc | 1340 | size_t cookie_len; |
8ba708e5 MC |
1341 | PACKET cookiepkt; |
1342 | ||
1343 | if (!PACKET_forward(pkt, 2) | |
a230b26e | 1344 | || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) { |
c48ffbcc | 1345 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 1346 | return MSG_PROCESS_ERROR; |
8ba708e5 MC |
1347 | } |
1348 | ||
1349 | cookie_len = PACKET_remaining(&cookiepkt); | |
1350 | if (cookie_len > sizeof(s->d1->cookie)) { | |
c48ffbcc | 1351 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_LENGTH_TOO_LONG); |
f63a17d6 | 1352 | return MSG_PROCESS_ERROR; |
8ba708e5 MC |
1353 | } |
1354 | ||
1355 | if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) { | |
c48ffbcc | 1356 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 1357 | return MSG_PROCESS_ERROR; |
8ba708e5 MC |
1358 | } |
1359 | s->d1->cookie_len = cookie_len; | |
1360 | ||
1361 | return MSG_PROCESS_FINISHED_READING; | |
8ba708e5 MC |
1362 | } |
1363 | ||
38b051a1 TM |
1364 | static int set_client_ciphersuite(SSL_CONNECTION *s, |
1365 | const unsigned char *cipherchars) | |
b9908bf9 MC |
1366 | { |
1367 | STACK_OF(SSL_CIPHER) *sk; | |
1368 | const SSL_CIPHER *c; | |
11c67eea | 1369 | int i; |
38b051a1 | 1370 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
11c67eea MC |
1371 | |
1372 | c = ssl_get_cipher_by_char(s, cipherchars, 0); | |
1373 | if (c == NULL) { | |
1374 | /* unknown cipher */ | |
c48ffbcc | 1375 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_UNKNOWN_CIPHER_RETURNED); |
11c67eea MC |
1376 | return 0; |
1377 | } | |
1378 | /* | |
1379 | * If it is a disabled cipher we either didn't send it in client hello, | |
1380 | * or it's not allowed for the selected protocol. So we return an error. | |
1381 | */ | |
8af91fd9 | 1382 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK, 1)) { |
c48ffbcc | 1383 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CIPHER_RETURNED); |
11c67eea MC |
1384 | return 0; |
1385 | } | |
1386 | ||
1387 | sk = ssl_get_ciphers_by_id(s); | |
1388 | i = sk_SSL_CIPHER_find(sk, c); | |
1389 | if (i < 0) { | |
1390 | /* we did not say we would use this cipher */ | |
c48ffbcc | 1391 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CIPHER_RETURNED); |
11c67eea MC |
1392 | return 0; |
1393 | } | |
1394 | ||
38b051a1 | 1395 | if (SSL_CONNECTION_IS_TLS13(s) && s->s3.tmp.new_cipher != NULL |
555cbb32 | 1396 | && s->s3.tmp.new_cipher->id != c->id) { |
11c67eea | 1397 | /* ServerHello selected a different ciphersuite to that in the HRR */ |
c48ffbcc | 1398 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CIPHER_RETURNED); |
11c67eea MC |
1399 | return 0; |
1400 | } | |
1401 | ||
1402 | /* | |
1403 | * Depending on the session caching (internal/external), the cipher | |
1404 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
1405 | * set and use it for comparison. | |
1406 | */ | |
1407 | if (s->session->cipher != NULL) | |
1408 | s->session->cipher_id = s->session->cipher->id; | |
1409 | if (s->hit && (s->session->cipher_id != c->id)) { | |
38b051a1 TM |
1410 | if (SSL_CONNECTION_IS_TLS13(s)) { |
1411 | const EVP_MD *md = ssl_md(sctx, c->algorithm2); | |
b740012f | 1412 | |
a055a881 MC |
1413 | /* |
1414 | * In TLSv1.3 it is valid for the server to select a different | |
1415 | * ciphersuite as long as the hash is the same. | |
1416 | */ | |
b740012f | 1417 | if (md == NULL |
38b051a1 | 1418 | || md != ssl_md(sctx, s->session->cipher->algorithm2)) { |
f63a17d6 | 1419 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 | 1420 | SSL_R_CIPHERSUITE_DIGEST_HAS_CHANGED); |
a055a881 MC |
1421 | return 0; |
1422 | } | |
1423 | } else { | |
1424 | /* | |
1425 | * Prior to TLSv1.3 resuming a session always meant using the same | |
1426 | * ciphersuite. | |
1427 | */ | |
c48ffbcc | 1428 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 | 1429 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); |
a055a881 MC |
1430 | return 0; |
1431 | } | |
11c67eea | 1432 | } |
555cbb32 | 1433 | s->s3.tmp.new_cipher = c; |
11c67eea MC |
1434 | |
1435 | return 1; | |
1436 | } | |
1437 | ||
38b051a1 | 1438 | MSG_PROCESS_RETURN tls_process_server_hello(SSL_CONNECTION *s, PACKET *pkt) |
11c67eea | 1439 | { |
332eb390 | 1440 | PACKET session_id, extpkt; |
b9908bf9 | 1441 | size_t session_id_len; |
b6981744 | 1442 | const unsigned char *cipherchars; |
597c51bc | 1443 | int hrr = 0; |
b9908bf9 | 1444 | unsigned int compression; |
4fa52141 | 1445 | unsigned int sversion; |
3434f40b | 1446 | unsigned int context; |
332eb390 | 1447 | RAW_EXTENSION *extensions = NULL; |
38b051a1 | 1448 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
b9908bf9 MC |
1449 | #ifndef OPENSSL_NO_COMP |
1450 | SSL_COMP *comp; | |
1451 | #endif | |
1452 | ||
4fa52141 | 1453 | if (!PACKET_get_net_2(pkt, &sversion)) { |
c48ffbcc | 1454 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 1455 | goto err; |
4fa52141 | 1456 | } |
50932c4a | 1457 | |
c3043dcd | 1458 | /* load the server random */ |
597c51bc MC |
1459 | if (s->version == TLS1_3_VERSION |
1460 | && sversion == TLS1_2_VERSION | |
1461 | && PACKET_remaining(pkt) >= SSL3_RANDOM_SIZE | |
1462 | && memcmp(hrrrandom, PACKET_data(pkt), SSL3_RANDOM_SIZE) == 0) { | |
d204a50b TM |
1463 | if (s->hello_retry_request != SSL_HRR_NONE) { |
1464 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_R_UNEXPECTED_MESSAGE); | |
1465 | goto err; | |
1466 | } | |
fc7129dc | 1467 | s->hello_retry_request = SSL_HRR_PENDING; |
9cd9e097 | 1468 | /* Tell the record layer that we know we're going to get TLSv1.3 */ |
1d367677 MC |
1469 | if (!ssl_set_record_protocol_version(s, s->version)) { |
1470 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
1471 | goto err; | |
1472 | } | |
fc7129dc | 1473 | hrr = 1; |
597c51bc | 1474 | if (!PACKET_forward(pkt, SSL3_RANDOM_SIZE)) { |
c48ffbcc | 1475 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
597c51bc MC |
1476 | goto err; |
1477 | } | |
1478 | } else { | |
555cbb32 | 1479 | if (!PACKET_copy_bytes(pkt, s->s3.server_random, SSL3_RANDOM_SIZE)) { |
c48ffbcc | 1480 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
597c51bc MC |
1481 | goto err; |
1482 | } | |
c3043dcd MC |
1483 | } |
1484 | ||
88050dd1 MC |
1485 | /* Get the session-id. */ |
1486 | if (!PACKET_get_length_prefixed_1(pkt, &session_id)) { | |
c48ffbcc | 1487 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 1488 | goto err; |
0f113f3e | 1489 | } |
88050dd1 MC |
1490 | session_id_len = PACKET_remaining(&session_id); |
1491 | if (session_id_len > sizeof(s->session->session_id) | |
1492 | || session_id_len > SSL3_SESSION_ID_SIZE) { | |
c48ffbcc | 1493 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_SSL3_SESSION_ID_TOO_LONG); |
f63a17d6 | 1494 | goto err; |
524420d8 MC |
1495 | } |
1496 | ||
73999b62 | 1497 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
c48ffbcc | 1498 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 1499 | goto err; |
fc5ce51d EK |
1500 | } |
1501 | ||
88050dd1 | 1502 | if (!PACKET_get_1(pkt, &compression)) { |
c48ffbcc | 1503 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
88050dd1 | 1504 | goto err; |
4ff65f77 MC |
1505 | } |
1506 | ||
1507 | /* TLS extensions */ | |
597c51bc | 1508 | if (PACKET_remaining(pkt) == 0 && !hrr) { |
4ff65f77 | 1509 | PACKET_null_init(&extpkt); |
26b9172a MC |
1510 | } else if (!PACKET_as_length_prefixed_2(pkt, &extpkt) |
1511 | || PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 1512 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_LENGTH); |
f63a17d6 | 1513 | goto err; |
4ff65f77 MC |
1514 | } |
1515 | ||
597c51bc MC |
1516 | if (!hrr) { |
1517 | if (!tls_collect_extensions(s, &extpkt, | |
1518 | SSL_EXT_TLS1_2_SERVER_HELLO | |
1519 | | SSL_EXT_TLS1_3_SERVER_HELLO, | |
1520 | &extensions, NULL, 1)) { | |
1521 | /* SSLfatal() already called */ | |
1522 | goto err; | |
1523 | } | |
1524 | ||
1525 | if (!ssl_choose_client_version(s, sversion, extensions)) { | |
1526 | /* SSLfatal() already called */ | |
1527 | goto err; | |
1528 | } | |
88050dd1 MC |
1529 | } |
1530 | ||
38b051a1 | 1531 | if (SSL_CONNECTION_IS_TLS13(s) || hrr) { |
597c51bc MC |
1532 | if (compression != 0) { |
1533 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, | |
597c51bc MC |
1534 | SSL_R_INVALID_COMPRESSION_ALGORITHM); |
1535 | goto err; | |
1536 | } | |
1537 | ||
1538 | if (session_id_len != s->tmp_session_id_len | |
1539 | || memcmp(PACKET_data(&session_id), s->tmp_session_id, | |
1540 | session_id_len) != 0) { | |
c48ffbcc | 1541 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_INVALID_SESSION_ID); |
597c51bc MC |
1542 | goto err; |
1543 | } | |
1544 | } | |
1545 | ||
1546 | if (hrr) { | |
1547 | if (!set_client_ciphersuite(s, cipherchars)) { | |
1548 | /* SSLfatal() already called */ | |
1549 | goto err; | |
1550 | } | |
1551 | ||
1552 | return tls_process_as_hello_retry_request(s, &extpkt); | |
88050dd1 MC |
1553 | } |
1554 | ||
1555 | /* | |
1556 | * Now we have chosen the version we need to check again that the extensions | |
1557 | * are appropriate for this version. | |
1558 | */ | |
38b051a1 TM |
1559 | context = SSL_CONNECTION_IS_TLS13(s) ? SSL_EXT_TLS1_3_SERVER_HELLO |
1560 | : SSL_EXT_TLS1_2_SERVER_HELLO; | |
88050dd1 | 1561 | if (!tls_validate_all_contexts(s, context, extensions)) { |
c48ffbcc | 1562 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_EXTENSION); |
88050dd1 MC |
1563 | goto err; |
1564 | } | |
1565 | ||
4ff65f77 MC |
1566 | s->hit = 0; |
1567 | ||
38b051a1 | 1568 | if (SSL_CONNECTION_IS_TLS13(s)) { |
a5816a5a MC |
1569 | /* |
1570 | * In TLSv1.3 a ServerHello message signals a key change so the end of | |
1571 | * the message must be on a record boundary. | |
1572 | */ | |
1573 | if (RECORD_LAYER_processed_read_pending(&s->rlayer)) { | |
1574 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, | |
a5816a5a MC |
1575 | SSL_R_NOT_ON_RECORD_BOUNDARY); |
1576 | goto err; | |
1577 | } | |
1578 | ||
4ff65f77 MC |
1579 | /* This will set s->hit if we are resuming */ |
1580 | if (!tls_parse_extension(s, TLSEXT_IDX_psk, | |
fe874d27 | 1581 | SSL_EXT_TLS1_3_SERVER_HELLO, |
88050dd1 | 1582 | extensions, NULL, 0)) { |
f63a17d6 MC |
1583 | /* SSLfatal() already called */ |
1584 | goto err; | |
1585 | } | |
4ff65f77 | 1586 | } else { |
8c1a5343 | 1587 | /* |
4ff65f77 MC |
1588 | * Check if we can resume the session based on external pre-shared |
1589 | * secret. EAP-FAST (RFC 4851) supports two types of session resumption. | |
1590 | * Resumption based on server-side state works with session IDs. | |
1591 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
1592 | * works by overriding the SessionTicket extension at the application | |
1593 | * layer, and does not send a session ID. (We do not know whether | |
1594 | * EAP-FAST servers would honour the session ID.) Therefore, the session | |
1595 | * ID alone is not a reliable indicator of session resumption, so we | |
1596 | * first check if we can resume, and later peek at the next handshake | |
1597 | * message to see if the server wants to resume. | |
8c1a5343 | 1598 | */ |
4ff65f77 MC |
1599 | if (s->version >= TLS1_VERSION |
1600 | && s->ext.session_secret_cb != NULL && s->session->ext.tick) { | |
1601 | const SSL_CIPHER *pref_cipher = NULL; | |
1602 | /* | |
1603 | * s->session->master_key_length is a size_t, but this is an int for | |
1604 | * backwards compat reasons | |
1605 | */ | |
1606 | int master_key_length; | |
38b051a1 | 1607 | |
4ff65f77 | 1608 | master_key_length = sizeof(s->session->master_key); |
38b051a1 | 1609 | if (s->ext.session_secret_cb(ssl, s->session->master_key, |
4ff65f77 MC |
1610 | &master_key_length, |
1611 | NULL, &pref_cipher, | |
1612 | s->ext.session_secret_cb_arg) | |
1613 | && master_key_length > 0) { | |
1614 | s->session->master_key_length = master_key_length; | |
1615 | s->session->cipher = pref_cipher ? | |
60d685d1 | 1616 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars, 0); |
4ff65f77 | 1617 | } else { |
c48ffbcc | 1618 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f63a17d6 | 1619 | goto err; |
4ff65f77 | 1620 | } |
0f113f3e | 1621 | } |
4ff65f77 MC |
1622 | |
1623 | if (session_id_len != 0 | |
1624 | && session_id_len == s->session->session_id_length | |
1625 | && memcmp(PACKET_data(&session_id), s->session->session_id, | |
1626 | session_id_len) == 0) | |
1627 | s->hit = 1; | |
50932c4a MC |
1628 | } |
1629 | ||
4ff65f77 | 1630 | if (s->hit) { |
0f113f3e | 1631 | if (s->sid_ctx_length != s->session->sid_ctx_length |
4ff65f77 | 1632 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { |
0f113f3e | 1633 | /* actually a client application bug */ |
f63a17d6 | 1634 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 MC |
1635 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); |
1636 | goto err; | |
0f113f3e | 1637 | } |
6e3d0153 | 1638 | } else { |
0f113f3e | 1639 | /* |
6e3d0153 | 1640 | * If we were trying for session-id reuse but the server |
4ff65f77 | 1641 | * didn't resume, make a new SSL_SESSION. |
6e3d0153 EK |
1642 | * In the case of EAP-FAST and PAC, we do not send a session ID, |
1643 | * so the PAC-based session secret is always preserved. It'll be | |
1644 | * overwritten if the server refuses resumption. | |
0f113f3e | 1645 | */ |
c96ce52c | 1646 | if (s->session->session_id_length > 0) { |
acce0557 | 1647 | ssl_tsan_counter(s->session_ctx, &s->session_ctx->stats.sess_miss); |
0f113f3e | 1648 | if (!ssl_get_new_session(s, 0)) { |
f63a17d6 MC |
1649 | /* SSLfatal() already called */ |
1650 | goto err; | |
0f113f3e MC |
1651 | } |
1652 | } | |
50932c4a | 1653 | |
ccae4a15 | 1654 | s->session->ssl_version = s->version; |
a5816a5a MC |
1655 | /* |
1656 | * In TLSv1.2 and below we save the session id we were sent so we can | |
1657 | * resume it later. In TLSv1.3 the session id we were sent is just an | |
1658 | * echo of what we originally sent in the ClientHello and should not be | |
1659 | * used for resumption. | |
1660 | */ | |
38b051a1 | 1661 | if (!SSL_CONNECTION_IS_TLS13(s)) { |
a5816a5a MC |
1662 | s->session->session_id_length = session_id_len; |
1663 | /* session_id_len could be 0 */ | |
1664 | if (session_id_len > 0) | |
1665 | memcpy(s->session->session_id, PACKET_data(&session_id), | |
1666 | session_id_len); | |
1667 | } | |
0f113f3e | 1668 | } |
fc5ce51d | 1669 | |
ccae4a15 FI |
1670 | /* Session version and negotiated protocol version should match */ |
1671 | if (s->version != s->session->ssl_version) { | |
c48ffbcc | 1672 | SSLfatal(s, SSL_AD_PROTOCOL_VERSION, |
f63a17d6 MC |
1673 | SSL_R_SSL_SESSION_VERSION_MISMATCH); |
1674 | goto err; | |
ccae4a15 | 1675 | } |
0f113f3e | 1676 | /* |
3eb2aff4 KR |
1677 | * Now that we know the version, update the check to see if it's an allowed |
1678 | * version. | |
1679 | */ | |
555cbb32 TS |
1680 | s->s3.tmp.min_ver = s->version; |
1681 | s->s3.tmp.max_ver = s->version; | |
0f113f3e | 1682 | |
11c67eea | 1683 | if (!set_client_ciphersuite(s, cipherchars)) { |
f63a17d6 MC |
1684 | /* SSLfatal() already called */ |
1685 | goto err; | |
0f113f3e MC |
1686 | } |
1687 | ||
09b6c2ef | 1688 | #ifdef OPENSSL_NO_COMP |
fc5ce51d | 1689 | if (compression != 0) { |
c48ffbcc | 1690 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 MC |
1691 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1692 | goto err; | |
0f113f3e MC |
1693 | } |
1694 | /* | |
1695 | * If compression is disabled we'd better not try to resume a session | |
1696 | * using compression. | |
1697 | */ | |
1698 | if (s->session->compress_meth != 0) { | |
c48ffbcc | 1699 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_INCONSISTENT_COMPRESSION); |
f63a17d6 | 1700 | goto err; |
0f113f3e | 1701 | } |
09b6c2ef | 1702 | #else |
fc5ce51d | 1703 | if (s->hit && compression != s->session->compress_meth) { |
c48ffbcc | 1704 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
dd5a4279 | 1705 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); |
f63a17d6 | 1706 | goto err; |
0f113f3e | 1707 | } |
fc5ce51d | 1708 | if (compression == 0) |
0f113f3e MC |
1709 | comp = NULL; |
1710 | else if (!ssl_allow_compression(s)) { | |
c48ffbcc | 1711 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_COMPRESSION_DISABLED); |
f63a17d6 | 1712 | goto err; |
fc5ce51d | 1713 | } else { |
38b051a1 TM |
1714 | comp = ssl3_comp_find(SSL_CONNECTION_GET_CTX(s)->comp_methods, |
1715 | compression); | |
fc5ce51d | 1716 | } |
0f113f3e | 1717 | |
fc5ce51d | 1718 | if (compression != 0 && comp == NULL) { |
c48ffbcc | 1719 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 MC |
1720 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1721 | goto err; | |
0f113f3e | 1722 | } else { |
555cbb32 | 1723 | s->s3.tmp.new_compression = comp; |
0f113f3e | 1724 | } |
09b6c2ef | 1725 | #endif |
761772d7 | 1726 | |
f63a17d6 MC |
1727 | if (!tls_parse_all_extensions(s, context, extensions, NULL, 0, 1)) { |
1728 | /* SSLfatal() already called */ | |
1729 | goto err; | |
1730 | } | |
332eb390 | 1731 | |
8723588e | 1732 | #ifndef OPENSSL_NO_SCTP |
38b051a1 | 1733 | if (SSL_CONNECTION_IS_DTLS(s) && s->hit) { |
8723588e MC |
1734 | unsigned char sctpauthkey[64]; |
1735 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
09d62b33 | 1736 | size_t labellen; |
8723588e MC |
1737 | |
1738 | /* | |
1739 | * Add new shared key for SCTP-Auth, will be ignored if | |
1740 | * no SCTP used. | |
1741 | */ | |
141eb8c6 MC |
1742 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
1743 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
8723588e | 1744 | |
09d62b33 MT |
1745 | /* Don't include the terminating zero. */ |
1746 | labellen = sizeof(labelbuffer) - 1; | |
1747 | if (s->mode & SSL_MODE_DTLS_SCTP_LABEL_LENGTH_BUG) | |
1748 | labellen += 1; | |
1749 | ||
38b051a1 | 1750 | if (SSL_export_keying_material(ssl, sctpauthkey, |
a230b26e EK |
1751 | sizeof(sctpauthkey), |
1752 | labelbuffer, | |
09d62b33 | 1753 | labellen, NULL, 0, 0) <= 0) { |
c48ffbcc | 1754 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f63a17d6 MC |
1755 | goto err; |
1756 | } | |
8723588e | 1757 | |
38b051a1 | 1758 | BIO_ctrl(SSL_get_wbio(ssl), |
8723588e MC |
1759 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, |
1760 | sizeof(sctpauthkey), sctpauthkey); | |
1761 | } | |
1762 | #endif | |
1763 | ||
92760c21 MC |
1764 | /* |
1765 | * In TLSv1.3 we have some post-processing to change cipher state, otherwise | |
1766 | * we're done with this message | |
1767 | */ | |
38b051a1 TM |
1768 | if (SSL_CONNECTION_IS_TLS13(s) |
1769 | && (!ssl->method->ssl3_enc->setup_key_block(s) | |
1770 | || !ssl->method->ssl3_enc->change_cipher_state(s, | |
92760c21 | 1771 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_READ))) { |
f63a17d6 MC |
1772 | /* SSLfatal() already called */ |
1773 | goto err; | |
92760c21 MC |
1774 | } |
1775 | ||
1b0286a3 | 1776 | OPENSSL_free(extensions); |
b9908bf9 | 1777 | return MSG_PROCESS_CONTINUE_READING; |
f63a17d6 | 1778 | err: |
1b0286a3 | 1779 | OPENSSL_free(extensions); |
b9908bf9 | 1780 | return MSG_PROCESS_ERROR; |
0f113f3e | 1781 | } |
d02b48c6 | 1782 | |
38b051a1 | 1783 | static MSG_PROCESS_RETURN tls_process_as_hello_retry_request(SSL_CONNECTION *s, |
597c51bc | 1784 | PACKET *extpkt) |
3847d426 | 1785 | { |
3847d426 | 1786 | RAW_EXTENSION *extensions = NULL; |
3847d426 | 1787 | |
d4504fe5 | 1788 | /* |
f471f60a MC |
1789 | * If we were sending early_data then any alerts should not be sent using |
1790 | * the old wrlmethod. | |
d4504fe5 | 1791 | */ |
f471f60a MC |
1792 | if (s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING |
1793 | && !ssl_set_new_record_layer(s, | |
1794 | TLS_ANY_VERSION, | |
1795 | OSSL_RECORD_DIRECTION_WRITE, | |
1796 | OSSL_RECORD_PROTECTION_LEVEL_NONE, | |
3f9175c7 MC |
1797 | NULL, 0, NULL, 0, NULL, 0, NULL, 0, |
1798 | NULL, 0, NID_undef, NULL, NULL, NULL)) { | |
f471f60a MC |
1799 | /* SSLfatal already called */ |
1800 | goto err; | |
1801 | } | |
1802 | /* We are definitely going to be using TLSv1.3 */ | |
1803 | s->rlayer.wrlmethod->set_protocol_version(s->rlayer.wrl, TLS1_3_VERSION); | |
d4504fe5 | 1804 | |
597c51bc | 1805 | if (!tls_collect_extensions(s, extpkt, SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST, |
f63a17d6 | 1806 | &extensions, NULL, 1) |
fe874d27 | 1807 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST, |
f63a17d6 MC |
1808 | extensions, NULL, 0, 1)) { |
1809 | /* SSLfatal() already called */ | |
1810 | goto err; | |
1811 | } | |
3847d426 MC |
1812 | |
1813 | OPENSSL_free(extensions); | |
66d4bf6b MC |
1814 | extensions = NULL; |
1815 | ||
5b64ce89 | 1816 | if (s->ext.tls13_cookie_len == 0 && s->s3.tmp.pkey != NULL) { |
66d4bf6b MC |
1817 | /* |
1818 | * We didn't receive a cookie or a new key_share so the next | |
1819 | * ClientHello will not change | |
1820 | */ | |
c48ffbcc | 1821 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_NO_CHANGE_FOLLOWING_HRR); |
f63a17d6 | 1822 | goto err; |
66d4bf6b | 1823 | } |
3847d426 | 1824 | |
11c67eea MC |
1825 | /* |
1826 | * Re-initialise the Transcript Hash. We're going to prepopulate it with | |
1827 | * a synthetic message_hash in place of ClientHello1. | |
1828 | */ | |
43054d3d | 1829 | if (!create_synthetic_message_hash(s, NULL, 0, NULL, 0)) { |
f63a17d6 MC |
1830 | /* SSLfatal() already called */ |
1831 | goto err; | |
11c67eea MC |
1832 | } |
1833 | ||
1834 | /* | |
1835 | * Add this message to the Transcript Hash. Normally this is done | |
1836 | * automatically prior to the message processing stage. However due to the | |
1837 | * need to create the synthetic message hash, we defer that step until now | |
1838 | * for HRR messages. | |
1839 | */ | |
1840 | if (!ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, | |
1841 | s->init_num + SSL3_HM_HEADER_LENGTH)) { | |
f63a17d6 MC |
1842 | /* SSLfatal() already called */ |
1843 | goto err; | |
11c67eea MC |
1844 | } |
1845 | ||
3847d426 | 1846 | return MSG_PROCESS_FINISHED_READING; |
f63a17d6 | 1847 | err: |
3847d426 MC |
1848 | OPENSSL_free(extensions); |
1849 | return MSG_PROCESS_ERROR; | |
1850 | } | |
1851 | ||
3201abeb | 1852 | /* prepare server cert verification by setting s->session->peer_chain from pkt */ |
38b051a1 TM |
1853 | MSG_PROCESS_RETURN tls_process_server_certificate(SSL_CONNECTION *s, |
1854 | PACKET *pkt) | |
b9908bf9 | 1855 | { |
b9908bf9 MC |
1856 | unsigned long cert_list_len, cert_len; |
1857 | X509 *x = NULL; | |
b6981744 | 1858 | const unsigned char *certstart, *certbytes; |
0c3eb279 | 1859 | size_t chainidx; |
e96e0f8e | 1860 | unsigned int context = 0; |
38b051a1 | 1861 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
0f113f3e | 1862 | |
0c3eb279 | 1863 | if ((s->session->peer_chain = sk_X509_new_null()) == NULL) { |
e077455e | 1864 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
cc273a93 | 1865 | goto err; |
0f113f3e MC |
1866 | } |
1867 | ||
38b051a1 | 1868 | if ((SSL_CONNECTION_IS_TLS13(s) && !PACKET_get_1(pkt, &context)) |
e96e0f8e MC |
1869 | || context != 0 |
1870 | || !PACKET_get_net_3(pkt, &cert_list_len) | |
1a281aab MC |
1871 | || PACKET_remaining(pkt) != cert_list_len |
1872 | || PACKET_remaining(pkt) == 0) { | |
c48ffbcc | 1873 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 1874 | goto err; |
0f113f3e | 1875 | } |
d805a57b | 1876 | for (chainidx = 0; PACKET_remaining(pkt); chainidx++) { |
73999b62 | 1877 | if (!PACKET_get_net_3(pkt, &cert_len) |
a230b26e | 1878 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) { |
c48ffbcc | 1879 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_CERT_LENGTH_MISMATCH); |
f63a17d6 | 1880 | goto err; |
0f113f3e MC |
1881 | } |
1882 | ||
df758a85 | 1883 | certstart = certbytes; |
38b051a1 | 1884 | x = X509_new_ex(sctx->libctx, sctx->propq); |
0f113f3e | 1885 | if (x == NULL) { |
e077455e | 1886 | SSLfatal(s, SSL_AD_DECODE_ERROR, ERR_R_ASN1_LIB); |
6725682d SL |
1887 | goto err; |
1888 | } | |
1889 | if (d2i_X509(&x, (const unsigned char **)&certbytes, | |
1890 | cert_len) == NULL) { | |
c48ffbcc | 1891 | SSLfatal(s, SSL_AD_BAD_CERTIFICATE, ERR_R_ASN1_LIB); |
f63a17d6 | 1892 | goto err; |
0f113f3e | 1893 | } |
6725682d | 1894 | |
df758a85 | 1895 | if (certbytes != (certstart + cert_len)) { |
c48ffbcc | 1896 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_CERT_LENGTH_MISMATCH); |
f63a17d6 | 1897 | goto err; |
0f113f3e | 1898 | } |
e96e0f8e | 1899 | |
38b051a1 | 1900 | if (SSL_CONNECTION_IS_TLS13(s)) { |
e96e0f8e MC |
1901 | RAW_EXTENSION *rawexts = NULL; |
1902 | PACKET extensions; | |
1903 | ||
1904 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
c48ffbcc | 1905 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_LENGTH); |
f63a17d6 | 1906 | goto err; |
e96e0f8e | 1907 | } |
fe874d27 MC |
1908 | if (!tls_collect_extensions(s, &extensions, |
1909 | SSL_EXT_TLS1_3_CERTIFICATE, &rawexts, | |
f63a17d6 | 1910 | NULL, chainidx == 0) |
8e1634ec | 1911 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE, |
f63a17d6 | 1912 | rawexts, x, chainidx, |
8e1634ec | 1913 | PACKET_remaining(pkt) == 0)) { |
5ee289ea | 1914 | OPENSSL_free(rawexts); |
f63a17d6 MC |
1915 | /* SSLfatal already called */ |
1916 | goto err; | |
5ee289ea MC |
1917 | } |
1918 | OPENSSL_free(rawexts); | |
e96e0f8e MC |
1919 | } |
1920 | ||
0c3eb279 | 1921 | if (!sk_X509_push(s->session->peer_chain, x)) { |
e077455e | 1922 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
cc273a93 | 1923 | goto err; |
0f113f3e MC |
1924 | } |
1925 | x = NULL; | |
0f113f3e | 1926 | } |
0c3eb279 DDO |
1927 | return MSG_PROCESS_CONTINUE_PROCESSING; |
1928 | ||
1929 | err: | |
1930 | X509_free(x); | |
79b2a2f2 | 1931 | OSSL_STACK_OF_X509_free(s->session->peer_chain); |
0c3eb279 DDO |
1932 | s->session->peer_chain = NULL; |
1933 | return MSG_PROCESS_ERROR; | |
1934 | } | |
0f113f3e | 1935 | |
0c3eb279 DDO |
1936 | /* |
1937 | * Verify the s->session->peer_chain and check server cert type. | |
1938 | * On success set s->session->peer and s->session->verify_result. | |
1939 | * Else the peer certificate verification callback may request retry. | |
1940 | */ | |
38b051a1 TM |
1941 | WORK_STATE tls_post_process_server_certificate(SSL_CONNECTION *s, |
1942 | WORK_STATE wst) | |
0c3eb279 DDO |
1943 | { |
1944 | X509 *x; | |
1945 | EVP_PKEY *pkey = NULL; | |
1946 | const SSL_CERT_LOOKUP *clu; | |
1947 | size_t certidx; | |
1948 | int i; | |
1949 | ||
dfb39f73 TM |
1950 | if (s->rwstate == SSL_RETRY_VERIFY) |
1951 | s->rwstate = SSL_NOTHING; | |
0c3eb279 | 1952 | i = ssl_verify_cert_chain(s, s->session->peer_chain); |
dfb39f73 | 1953 | if (i > 0 && s->rwstate == SSL_RETRY_VERIFY) { |
0c3eb279 DDO |
1954 | return WORK_MORE_A; |
1955 | } | |
c8e2f98c MC |
1956 | /* |
1957 | * The documented interface is that SSL_VERIFY_PEER should be set in order | |
1958 | * for client side verification of the server certificate to take place. | |
1959 | * However, historically the code has only checked that *any* flag is set | |
1960 | * to cause server verification to take place. Use of the other flags makes | |
1961 | * no sense in client mode. An attempt to clean up the semantics was | |
1962 | * reverted because at least one application *only* set | |
1963 | * SSL_VERIFY_FAIL_IF_NO_PEER_CERT. Prior to the clean up this still caused | |
1964 | * server verification to take place, after the clean up it silently did | |
1965 | * nothing. SSL_CTX_set_verify()/SSL_set_verify() cannot validate the flags | |
1966 | * sent to them because they are void functions. Therefore, we now use the | |
1967 | * (less clean) historic behaviour of performing validation if any flag is | |
1968 | * set. The *documented* interface remains the same. | |
1969 | */ | |
dfb39f73 | 1970 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) { |
c6d38183 | 1971 | SSLfatal(s, ssl_x509err2alert(s->verify_result), |
f63a17d6 | 1972 | SSL_R_CERTIFICATE_VERIFY_FAILED); |
0c3eb279 | 1973 | return WORK_ERROR; |
0f113f3e MC |
1974 | } |
1975 | ERR_clear_error(); /* but we keep s->verify_result */ | |
0f113f3e | 1976 | |
0f113f3e MC |
1977 | /* |
1978 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
d4d78943 | 1979 | * which we don't include in statem_srvr.c |
0f113f3e | 1980 | */ |
0c3eb279 | 1981 | x = sk_X509_value(s->session->peer_chain, 0); |
0f113f3e | 1982 | |
8382fd3a | 1983 | pkey = X509_get0_pubkey(x); |
0f113f3e | 1984 | |
55a9a16f | 1985 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
c48ffbcc | 1986 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
f63a17d6 | 1987 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); |
0c3eb279 | 1988 | return WORK_ERROR; |
0f113f3e MC |
1989 | } |
1990 | ||
ee58915c MB |
1991 | if ((clu = ssl_cert_lookup_by_pkey(pkey, &certidx, |
1992 | SSL_CONNECTION_GET_CTX(s))) == NULL) { | |
c48ffbcc | 1993 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_UNKNOWN_CERTIFICATE_TYPE); |
0c3eb279 | 1994 | return WORK_ERROR; |
0f113f3e | 1995 | } |
05b8486e DSH |
1996 | /* |
1997 | * Check certificate type is consistent with ciphersuite. For TLS 1.3 | |
1998 | * skip check since TLS 1.3 ciphersuites can be used with any certificate | |
1999 | * type. | |
2000 | */ | |
38b051a1 | 2001 | if (!SSL_CONNECTION_IS_TLS13(s)) { |
555cbb32 | 2002 | if ((clu->amask & s->s3.tmp.new_cipher->algorithm_auth) == 0) { |
c48ffbcc | 2003 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CERTIFICATE_TYPE); |
0c3eb279 | 2004 | return WORK_ERROR; |
05b8486e | 2005 | } |
0f113f3e | 2006 | } |
55a9a16f MC |
2007 | |
2008 | X509_free(s->session->peer); | |
05f0fb9f | 2009 | X509_up_ref(x); |
55a9a16f | 2010 | s->session->peer = x; |
0f113f3e | 2011 | s->session->verify_result = s->verify_result; |
2c5dfdc3 MC |
2012 | |
2013 | /* Save the current hash state for when we receive the CertificateVerify */ | |
38b051a1 | 2014 | if (SSL_CONNECTION_IS_TLS13(s) |
2c5dfdc3 MC |
2015 | && !ssl_handshake_hash(s, s->cert_verify_hash, |
2016 | sizeof(s->cert_verify_hash), | |
2017 | &s->cert_verify_hash_len)) { | |
f63a17d6 | 2018 | /* SSLfatal() already called */; |
0c3eb279 | 2019 | return WORK_ERROR; |
2c5dfdc3 | 2020 | } |
0c3eb279 | 2021 | return WORK_FINISHED_CONTINUE; |
0f113f3e | 2022 | } |
d02b48c6 | 2023 | |
b67cb09f TS |
2024 | #ifndef OPENSSL_NO_COMP_ALG |
2025 | MSG_PROCESS_RETURN tls_process_server_compressed_certificate(SSL_CONNECTION *sc, PACKET *pkt) | |
2026 | { | |
2027 | MSG_PROCESS_RETURN ret = MSG_PROCESS_ERROR; | |
2028 | PACKET tmppkt; | |
2029 | BUF_MEM *buf = BUF_MEM_new(); | |
2030 | ||
2031 | if (tls13_process_compressed_certificate(sc, pkt, &tmppkt, buf) != MSG_PROCESS_ERROR) | |
2032 | ret = tls_process_server_certificate(sc, &tmppkt); | |
2033 | ||
2034 | BUF_MEM_free(buf); | |
2035 | return ret; | |
2036 | } | |
2037 | #endif | |
2038 | ||
38b051a1 | 2039 | static int tls_process_ske_psk_preamble(SSL_CONNECTION *s, PACKET *pkt) |
02a74590 MC |
2040 | { |
2041 | #ifndef OPENSSL_NO_PSK | |
7dc1c647 | 2042 | PACKET psk_identity_hint; |
02a74590 | 2043 | |
7dc1c647 MC |
2044 | /* PSK ciphersuites are preceded by an identity hint */ |
2045 | ||
2046 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) { | |
c48ffbcc | 2047 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
7dc1c647 MC |
2048 | return 0; |
2049 | } | |
2050 | ||
2051 | /* | |
2052 | * Store PSK identity hint for later use, hint is used in | |
2053 | * tls_construct_client_key_exchange. Assume that the maximum length of | |
2054 | * a PSK identity hint can be as long as the maximum length of a PSK | |
2055 | * identity. | |
2056 | */ | |
2057 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { | |
c48ffbcc | 2058 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_DATA_LENGTH_TOO_LONG); |
7dc1c647 MC |
2059 | return 0; |
2060 | } | |
02a74590 | 2061 | |
7dc1c647 MC |
2062 | if (PACKET_remaining(&psk_identity_hint) == 0) { |
2063 | OPENSSL_free(s->session->psk_identity_hint); | |
2064 | s->session->psk_identity_hint = NULL; | |
2065 | } else if (!PACKET_strndup(&psk_identity_hint, | |
a230b26e | 2066 | &s->session->psk_identity_hint)) { |
c48ffbcc | 2067 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
7dc1c647 MC |
2068 | return 0; |
2069 | } | |
2070 | ||
2071 | return 1; | |
2072 | #else | |
c48ffbcc | 2073 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
7dc1c647 | 2074 | return 0; |
02a74590 MC |
2075 | #endif |
2076 | } | |
2077 | ||
38b051a1 | 2078 | static int tls_process_ske_srp(SSL_CONNECTION *s, PACKET *pkt, EVP_PKEY **pkey) |
25c6c10c MC |
2079 | { |
2080 | #ifndef OPENSSL_NO_SRP | |
2081 | PACKET prime, generator, salt, server_pub; | |
2082 | ||
2083 | if (!PACKET_get_length_prefixed_2(pkt, &prime) | |
2084 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
2085 | || !PACKET_get_length_prefixed_1(pkt, &salt) | |
2086 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) { | |
c48ffbcc | 2087 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
25c6c10c MC |
2088 | return 0; |
2089 | } | |
2090 | ||
2091 | if ((s->srp_ctx.N = | |
2092 | BN_bin2bn(PACKET_data(&prime), | |
348240c6 | 2093 | (int)PACKET_remaining(&prime), NULL)) == NULL |
25c6c10c MC |
2094 | || (s->srp_ctx.g = |
2095 | BN_bin2bn(PACKET_data(&generator), | |
348240c6 | 2096 | (int)PACKET_remaining(&generator), NULL)) == NULL |
25c6c10c MC |
2097 | || (s->srp_ctx.s = |
2098 | BN_bin2bn(PACKET_data(&salt), | |
348240c6 | 2099 | (int)PACKET_remaining(&salt), NULL)) == NULL |
25c6c10c MC |
2100 | || (s->srp_ctx.B = |
2101 | BN_bin2bn(PACKET_data(&server_pub), | |
348240c6 | 2102 | (int)PACKET_remaining(&server_pub), NULL)) == NULL) { |
c48ffbcc | 2103 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_BN_LIB); |
25c6c10c MC |
2104 | return 0; |
2105 | } | |
2106 | ||
a2c2e000 MC |
2107 | if (!srp_verify_server_param(s)) { |
2108 | /* SSLfatal() already called */ | |
25c6c10c MC |
2109 | return 0; |
2110 | } | |
2111 | ||
2112 | /* We must check if there is a certificate */ | |
555cbb32 | 2113 | if (s->s3.tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
25c6c10c MC |
2114 | *pkey = X509_get0_pubkey(s->session->peer); |
2115 | ||
2116 | return 1; | |
2117 | #else | |
c48ffbcc | 2118 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
25c6c10c MC |
2119 | return 0; |
2120 | #endif | |
2121 | } | |
2122 | ||
38b051a1 | 2123 | static int tls_process_ske_dhe(SSL_CONNECTION *s, PACKET *pkt, EVP_PKEY **pkey) |
e01a610d | 2124 | { |
e01a610d MC |
2125 | PACKET prime, generator, pub_key; |
2126 | EVP_PKEY *peer_tmp = NULL; | |
e01a610d | 2127 | BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL; |
1ee22dc2 MC |
2128 | EVP_PKEY_CTX *pctx = NULL; |
2129 | OSSL_PARAM *params = NULL; | |
2130 | OSSL_PARAM_BLD *tmpl = NULL; | |
38b051a1 | 2131 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
1ee22dc2 | 2132 | int ret = 0; |
26505153 | 2133 | |
e01a610d MC |
2134 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
2135 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
2136 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) { | |
c48ffbcc | 2137 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
e01a610d MC |
2138 | return 0; |
2139 | } | |
2140 | ||
348240c6 MC |
2141 | p = BN_bin2bn(PACKET_data(&prime), (int)PACKET_remaining(&prime), NULL); |
2142 | g = BN_bin2bn(PACKET_data(&generator), (int)PACKET_remaining(&generator), | |
2143 | NULL); | |
2144 | bnpub_key = BN_bin2bn(PACKET_data(&pub_key), | |
2145 | (int)PACKET_remaining(&pub_key), NULL); | |
e01a610d | 2146 | if (p == NULL || g == NULL || bnpub_key == NULL) { |
c48ffbcc | 2147 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_BN_LIB); |
e01a610d MC |
2148 | goto err; |
2149 | } | |
2150 | ||
1ee22dc2 MC |
2151 | tmpl = OSSL_PARAM_BLD_new(); |
2152 | if (tmpl == NULL | |
2153 | || !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_P, p) | |
2154 | || !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_G, g) | |
2155 | || !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_PUB_KEY, | |
2156 | bnpub_key) | |
2157 | || (params = OSSL_PARAM_BLD_to_param(tmpl)) == NULL) { | |
2158 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
e01a610d MC |
2159 | goto err; |
2160 | } | |
e01a610d | 2161 | |
38b051a1 | 2162 | pctx = EVP_PKEY_CTX_new_from_name(sctx->libctx, "DH", sctx->propq); |
1ee22dc2 MC |
2163 | if (pctx == NULL) { |
2164 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
26505153 RL |
2165 | goto err; |
2166 | } | |
2db985b7 SL |
2167 | if (EVP_PKEY_fromdata_init(pctx) <= 0 |
2168 | || EVP_PKEY_fromdata(pctx, &peer_tmp, EVP_PKEY_KEYPAIR, params) <= 0) { | |
1ee22dc2 | 2169 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_DH_VALUE); |
e01a610d MC |
2170 | goto err; |
2171 | } | |
e01a610d | 2172 | |
1ee22dc2 | 2173 | EVP_PKEY_CTX_free(pctx); |
38b051a1 | 2174 | pctx = EVP_PKEY_CTX_new_from_pkey(sctx->libctx, peer_tmp, sctx->propq); |
1ee22dc2 | 2175 | if (pctx == NULL |
899e2564 MC |
2176 | /* |
2177 | * EVP_PKEY_param_check() will verify that the DH params are using | |
2178 | * a safe prime. In this context, because we're using ephemeral DH, | |
2179 | * we're ok with it not being a safe prime. | |
2180 | * EVP_PKEY_param_check_quick() skips the safe prime check. | |
2181 | */ | |
2182 | || EVP_PKEY_param_check_quick(pctx) != 1 | |
1ee22dc2 MC |
2183 | || EVP_PKEY_public_check(pctx) != 1) { |
2184 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_DH_VALUE); | |
e01a610d MC |
2185 | goto err; |
2186 | } | |
2187 | ||
ed576acd TM |
2188 | if (!ssl_security(s, SSL_SECOP_TMP_DH, |
2189 | EVP_PKEY_get_security_bits(peer_tmp), | |
47e81a1b | 2190 | 0, peer_tmp)) { |
c48ffbcc | 2191 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_DH_KEY_TOO_SMALL); |
ada66e78 P |
2192 | goto err; |
2193 | } | |
2194 | ||
555cbb32 | 2195 | s->s3.peer_tmp = peer_tmp; |
1ee22dc2 | 2196 | peer_tmp = NULL; |
e01a610d MC |
2197 | |
2198 | /* | |
2199 | * FIXME: This makes assumptions about which ciphersuites come with | |
2200 | * public keys. We should have a less ad-hoc way of doing this | |
2201 | */ | |
555cbb32 | 2202 | if (s->s3.tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
e01a610d MC |
2203 | *pkey = X509_get0_pubkey(s->session->peer); |
2204 | /* else anonymous DH, so no certificate or pkey. */ | |
2205 | ||
1ee22dc2 | 2206 | ret = 1; |
e01a610d MC |
2207 | |
2208 | err: | |
1ee22dc2 | 2209 | OSSL_PARAM_BLD_free(tmpl); |
3f883c7c | 2210 | OSSL_PARAM_free(params); |
1ee22dc2 MC |
2211 | EVP_PKEY_free(peer_tmp); |
2212 | EVP_PKEY_CTX_free(pctx); | |
e01a610d MC |
2213 | BN_free(p); |
2214 | BN_free(g); | |
2215 | BN_free(bnpub_key); | |
e01a610d | 2216 | |
1ee22dc2 | 2217 | return ret; |
e01a610d MC |
2218 | } |
2219 | ||
38b051a1 | 2220 | static int tls_process_ske_ecdhe(SSL_CONNECTION *s, PACKET *pkt, EVP_PKEY **pkey) |
ff74aeb1 | 2221 | { |
ff74aeb1 | 2222 | PACKET encoded_pt; |
6447e818 | 2223 | unsigned int curve_type, curve_id; |
ff74aeb1 MC |
2224 | |
2225 | /* | |
2226 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
6447e818 | 2227 | * public key. We only support named (not generic) curves and |
ff74aeb1 MC |
2228 | * ECParameters in this case is just three bytes. |
2229 | */ | |
6447e818 | 2230 | if (!PACKET_get_1(pkt, &curve_type) || !PACKET_get_net_2(pkt, &curve_id)) { |
c48ffbcc | 2231 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_TOO_SHORT); |
ff74aeb1 MC |
2232 | return 0; |
2233 | } | |
2234 | /* | |
6447e818 DSH |
2235 | * Check curve is named curve type and one of our preferences, if not |
2236 | * server has sent an invalid curve. | |
ff74aeb1 | 2237 | */ |
dcf8b01f MC |
2238 | if (curve_type != NAMED_CURVE_TYPE |
2239 | || !tls1_check_group_id(s, curve_id, 1)) { | |
c48ffbcc | 2240 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CURVE); |
ff74aeb1 MC |
2241 | return 0; |
2242 | } | |
2243 | ||
ada66e78 | 2244 | if ((s->s3.peer_tmp = ssl_generate_param_group(s, curve_id)) == NULL) { |
c48ffbcc | 2245 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
a2c2e000 | 2246 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
ff74aeb1 MC |
2247 | return 0; |
2248 | } | |
2249 | ||
ff74aeb1 | 2250 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) { |
c48ffbcc | 2251 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
ff74aeb1 MC |
2252 | return 0; |
2253 | } | |
2254 | ||
5ac8fb58 MC |
2255 | if (EVP_PKEY_set1_encoded_public_key(s->s3.peer_tmp, |
2256 | PACKET_data(&encoded_pt), | |
2257 | PACKET_remaining(&encoded_pt)) <= 0) { | |
c48ffbcc | 2258 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_ECPOINT); |
ff74aeb1 MC |
2259 | return 0; |
2260 | } | |
2261 | ||
2262 | /* | |
2263 | * The ECC/TLS specification does not mention the use of DSA to sign | |
2264 | * ECParameters in the server key exchange message. We do support RSA | |
2265 | * and ECDSA. | |
2266 | */ | |
555cbb32 | 2267 | if (s->s3.tmp.new_cipher->algorithm_auth & SSL_aECDSA) |
ff74aeb1 | 2268 | *pkey = X509_get0_pubkey(s->session->peer); |
555cbb32 | 2269 | else if (s->s3.tmp.new_cipher->algorithm_auth & SSL_aRSA) |
ff74aeb1 MC |
2270 | *pkey = X509_get0_pubkey(s->session->peer); |
2271 | /* else anonymous ECDH, so no certificate or pkey. */ | |
2272 | ||
aa6bd216 BK |
2273 | /* Cache the agreed upon group in the SSL_SESSION */ |
2274 | s->session->kex_group = curve_id; | |
ff74aeb1 | 2275 | return 1; |
ff74aeb1 MC |
2276 | } |
2277 | ||
38b051a1 | 2278 | MSG_PROCESS_RETURN tls_process_key_exchange(SSL_CONNECTION *s, PACKET *pkt) |
b9908bf9 | 2279 | { |
e1e588ac | 2280 | long alg_k; |
b9908bf9 | 2281 | EVP_PKEY *pkey = NULL; |
fe3066ee MC |
2282 | EVP_MD_CTX *md_ctx = NULL; |
2283 | EVP_PKEY_CTX *pctx = NULL; | |
73999b62 | 2284 | PACKET save_param_start, signature; |
38b051a1 | 2285 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
b9908bf9 | 2286 | |
555cbb32 | 2287 | alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
b9908bf9 | 2288 | |
73999b62 | 2289 | save_param_start = *pkt; |
8d92c1f8 | 2290 | |
555cbb32 TS |
2291 | EVP_PKEY_free(s->s3.peer_tmp); |
2292 | s->s3.peer_tmp = NULL; | |
d02b48c6 | 2293 | |
7689082b | 2294 | if (alg_k & SSL_PSK) { |
a2c2e000 MC |
2295 | if (!tls_process_ske_psk_preamble(s, pkt)) { |
2296 | /* SSLfatal() already called */ | |
7dc1c647 | 2297 | goto err; |
a2c2e000 | 2298 | } |
7689082b DSH |
2299 | } |
2300 | ||
2301 | /* Nothing else to do for plain PSK or RSAPSK */ | |
2302 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
25c6c10c | 2303 | } else if (alg_k & SSL_kSRP) { |
a2c2e000 MC |
2304 | if (!tls_process_ske_srp(s, pkt, &pkey)) { |
2305 | /* SSLfatal() already called */ | |
0f113f3e | 2306 | goto err; |
a2c2e000 | 2307 | } |
e01a610d | 2308 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
a2c2e000 MC |
2309 | if (!tls_process_ske_dhe(s, pkt, &pkey)) { |
2310 | /* SSLfatal() already called */ | |
e01a610d | 2311 | goto err; |
a2c2e000 | 2312 | } |
ff74aeb1 | 2313 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
a2c2e000 MC |
2314 | if (!tls_process_ske_ecdhe(s, pkt, &pkey)) { |
2315 | /* SSLfatal() already called */ | |
ff74aeb1 | 2316 | goto err; |
a2c2e000 | 2317 | } |
0f113f3e | 2318 | } else if (alg_k) { |
c48ffbcc | 2319 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_R_UNEXPECTED_MESSAGE); |
e1e588ac | 2320 | goto err; |
0f113f3e | 2321 | } |
0f113f3e | 2322 | |
0f113f3e MC |
2323 | /* if it was signed, check the signature */ |
2324 | if (pkey != NULL) { | |
32942870 | 2325 | PACKET params; |
be8dba2c | 2326 | const EVP_MD *md = NULL; |
72ceb6a6 DSH |
2327 | unsigned char *tbs; |
2328 | size_t tbslen; | |
2329 | int rv; | |
e1e588ac | 2330 | |
32942870 EK |
2331 | /* |
2332 | * |pkt| now points to the beginning of the signature, so the difference | |
2333 | * equals the length of the parameters. | |
2334 | */ | |
2335 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms, | |
2336 | PACKET_remaining(&save_param_start) - | |
73999b62 | 2337 | PACKET_remaining(pkt))) { |
c48ffbcc | 2338 | SSLfatal(s, SSL_AD_DECODE_ERROR, ERR_R_INTERNAL_ERROR); |
e1e588ac | 2339 | goto err; |
32942870 EK |
2340 | } |
2341 | ||
0f113f3e | 2342 | if (SSL_USE_SIGALGS(s)) { |
703bcee0 | 2343 | unsigned int sigalg; |
703bcee0 MC |
2344 | |
2345 | if (!PACKET_get_net_2(pkt, &sigalg)) { | |
c48ffbcc | 2346 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_TOO_SHORT); |
e1e588ac | 2347 | goto err; |
0f113f3e | 2348 | } |
f63a17d6 MC |
2349 | if (tls12_check_peer_sigalg(s, sigalg, pkey) <=0) { |
2350 | /* SSLfatal() already called */ | |
0f113f3e | 2351 | goto err; |
0f113f3e | 2352 | } |
f365a3e2 | 2353 | } else if (!tls1_set_peer_legacy_sigalg(s, pkey)) { |
97b8db1a TM |
2354 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2355 | SSL_R_LEGACY_SIGALG_DISALLOWED_OR_UNSUPPORTED); | |
f365a3e2 | 2356 | goto err; |
32942870 | 2357 | } |
0f113f3e | 2358 | |
38b051a1 | 2359 | if (!tls1_lookup_md(sctx, s->s3.tmp.peer_sigalg, &md)) { |
c48ffbcc | 2360 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
7cd1420b | 2361 | SSL_R_NO_SUITABLE_DIGEST_ALGORITHM); |
b2021556 DSH |
2362 | goto err; |
2363 | } | |
44f23cd2 | 2364 | if (SSL_USE_SIGALGS(s)) |
49b26f54 | 2365 | OSSL_TRACE1(TLS, "USING TLSv1.2 HASH %s\n", |
ed576acd | 2366 | md == NULL ? "n/a" : EVP_MD_get0_name(md)); |
f365a3e2 | 2367 | |
73999b62 MC |
2368 | if (!PACKET_get_length_prefixed_2(pkt, &signature) |
2369 | || PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 2370 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
e1e588ac | 2371 | goto err; |
0f113f3e | 2372 | } |
e1e588ac MC |
2373 | |
2374 | md_ctx = EVP_MD_CTX_new(); | |
2375 | if (md_ctx == NULL) { | |
e077455e | 2376 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
e1e588ac | 2377 | goto err; |
0f113f3e | 2378 | } |
e1e588ac | 2379 | |
d8652be0 | 2380 | if (EVP_DigestVerifyInit_ex(md_ctx, &pctx, |
ed576acd | 2381 | md == NULL ? NULL : EVP_MD_get0_name(md), |
38b051a1 | 2382 | sctx->libctx, sctx->propq, pkey, |
d38b6ae9 | 2383 | NULL) <= 0) { |
c48ffbcc | 2384 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
fe3066ee MC |
2385 | goto err; |
2386 | } | |
5554facb | 2387 | if (SSL_USE_PSS(s)) { |
fe3066ee | 2388 | if (EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) <= 0 |
91410d40 | 2389 | || EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, |
968ae5b3 | 2390 | RSA_PSS_SALTLEN_DIGEST) <= 0) { |
c48ffbcc | 2391 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
fe3066ee MC |
2392 | goto err; |
2393 | } | |
2394 | } | |
72ceb6a6 DSH |
2395 | tbslen = construct_key_exchange_tbs(s, &tbs, PACKET_data(¶ms), |
2396 | PACKET_remaining(¶ms)); | |
2397 | if (tbslen == 0) { | |
f63a17d6 | 2398 | /* SSLfatal() already called */ |
e1e588ac | 2399 | goto err; |
192e4bbb | 2400 | } |
72ceb6a6 DSH |
2401 | |
2402 | rv = EVP_DigestVerify(md_ctx, PACKET_data(&signature), | |
2403 | PACKET_remaining(&signature), tbs, tbslen); | |
2404 | OPENSSL_free(tbs); | |
cfba0675 | 2405 | if (rv <= 0) { |
c48ffbcc | 2406 | SSLfatal(s, SSL_AD_DECRYPT_ERROR, SSL_R_BAD_SIGNATURE); |
e1e588ac | 2407 | goto err; |
0f113f3e | 2408 | } |
e1e588ac | 2409 | EVP_MD_CTX_free(md_ctx); |
fe3066ee | 2410 | md_ctx = NULL; |
0f113f3e | 2411 | } else { |
7689082b | 2412 | /* aNULL, aSRP or PSK do not need public keys */ |
555cbb32 | 2413 | if (!(s->s3.tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP)) |
a230b26e | 2414 | && !(alg_k & SSL_PSK)) { |
0f113f3e | 2415 | /* Might be wrong key type, check it */ |
e1e588ac | 2416 | if (ssl3_check_cert_and_algorithm(s)) { |
c48ffbcc | 2417 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_DATA); |
e1e588ac | 2418 | } |
a2c2e000 | 2419 | /* else this shouldn't happen, SSLfatal() already called */ |
0f113f3e MC |
2420 | goto err; |
2421 | } | |
2422 | /* still data left over */ | |
73999b62 | 2423 | if (PACKET_remaining(pkt) != 0) { |
c48ffbcc | 2424 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_EXTRA_DATA_IN_MESSAGE); |
e1e588ac | 2425 | goto err; |
0f113f3e MC |
2426 | } |
2427 | } | |
e1e588ac | 2428 | |
b9908bf9 | 2429 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2430 | err: |
fe3066ee | 2431 | EVP_MD_CTX_free(md_ctx); |
b9908bf9 | 2432 | return MSG_PROCESS_ERROR; |
0f113f3e | 2433 | } |
d02b48c6 | 2434 | |
38b051a1 TM |
2435 | MSG_PROCESS_RETURN tls_process_certificate_request(SSL_CONNECTION *s, |
2436 | PACKET *pkt) | |
b9908bf9 | 2437 | { |
32f66107 | 2438 | /* Clear certificate validity flags */ |
ee58915c MB |
2439 | if (s->s3.tmp.valid_flags != NULL) |
2440 | memset(s->s3.tmp.valid_flags, 0, s->ssl_pkey_num * sizeof(uint32_t)); | |
2441 | else | |
2442 | s->s3.tmp.valid_flags = OPENSSL_zalloc(s->ssl_pkey_num * sizeof(uint32_t)); | |
2443 | ||
2444 | /* Give up for good if allocation didn't work */ | |
2445 | if (s->s3.tmp.valid_flags == NULL) | |
2446 | return 0; | |
0f113f3e | 2447 | |
38b051a1 | 2448 | if (SSL_CONNECTION_IS_TLS13(s)) { |
32f66107 DSH |
2449 | PACKET reqctx, extensions; |
2450 | RAW_EXTENSION *rawexts = NULL; | |
03f44b97 | 2451 | |
1bf4cb0f MC |
2452 | if ((s->shutdown & SSL_SENT_SHUTDOWN) != 0) { |
2453 | /* | |
2454 | * We already sent close_notify. This can only happen in TLSv1.3 | |
2455 | * post-handshake messages. We can't reasonably respond to this, so | |
2456 | * we just ignore it | |
2457 | */ | |
2458 | return MSG_PROCESS_FINISHED_READING; | |
2459 | } | |
2460 | ||
03f44b97 | 2461 | /* Free and zero certificate types: it is not present in TLS 1.3 */ |
555cbb32 TS |
2462 | OPENSSL_free(s->s3.tmp.ctype); |
2463 | s->s3.tmp.ctype = NULL; | |
2464 | s->s3.tmp.ctype_len = 0; | |
9d75dce3 TS |
2465 | OPENSSL_free(s->pha_context); |
2466 | s->pha_context = NULL; | |
39a14059 | 2467 | s->pha_context_len = 0; |
32f66107 | 2468 | |
9d75dce3 TS |
2469 | if (!PACKET_get_length_prefixed_1(pkt, &reqctx) || |
2470 | !PACKET_memdup(&reqctx, &s->pha_context, &s->pha_context_len)) { | |
c48ffbcc | 2471 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2472 | return MSG_PROCESS_ERROR; |
03f44b97 | 2473 | } |
32f66107 DSH |
2474 | |
2475 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
c48ffbcc | 2476 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_LENGTH); |
f63a17d6 | 2477 | return MSG_PROCESS_ERROR; |
32f66107 DSH |
2478 | } |
2479 | if (!tls_collect_extensions(s, &extensions, | |
fe874d27 | 2480 | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, |
f63a17d6 | 2481 | &rawexts, NULL, 1) |
fe874d27 | 2482 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, |
f63a17d6 MC |
2483 | rawexts, NULL, 0, 1)) { |
2484 | /* SSLfatal() already called */ | |
32f66107 | 2485 | OPENSSL_free(rawexts); |
f63a17d6 | 2486 | return MSG_PROCESS_ERROR; |
32f66107 DSH |
2487 | } |
2488 | OPENSSL_free(rawexts); | |
2489 | if (!tls1_process_sigalgs(s)) { | |
c48ffbcc | 2490 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_LENGTH); |
f63a17d6 | 2491 | return MSG_PROCESS_ERROR; |
32f66107 | 2492 | } |
03f44b97 DSH |
2493 | } else { |
2494 | PACKET ctypes; | |
75c13e78 | 2495 | |
03f44b97 DSH |
2496 | /* get the certificate types */ |
2497 | if (!PACKET_get_length_prefixed_1(pkt, &ctypes)) { | |
c48ffbcc | 2498 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2499 | return MSG_PROCESS_ERROR; |
03f44b97 DSH |
2500 | } |
2501 | ||
555cbb32 | 2502 | if (!PACKET_memdup(&ctypes, &s->s3.tmp.ctype, &s->s3.tmp.ctype_len)) { |
c48ffbcc | 2503 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f63a17d6 | 2504 | return MSG_PROCESS_ERROR; |
03f44b97 | 2505 | } |
ac112332 | 2506 | |
32f66107 DSH |
2507 | if (SSL_USE_SIGALGS(s)) { |
2508 | PACKET sigalgs; | |
703bcee0 | 2509 | |
32f66107 | 2510 | if (!PACKET_get_length_prefixed_2(pkt, &sigalgs)) { |
c48ffbcc | 2511 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2512 | return MSG_PROCESS_ERROR; |
32f66107 | 2513 | } |
ac112332 | 2514 | |
c589c34e BK |
2515 | /* |
2516 | * Despite this being for certificates, preserve compatibility | |
2517 | * with pre-TLS 1.3 and use the regular sigalgs field. | |
2518 | */ | |
2519 | if (!tls1_save_sigalgs(s, &sigalgs, 0)) { | |
f63a17d6 | 2520 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
f63a17d6 MC |
2521 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); |
2522 | return MSG_PROCESS_ERROR; | |
32f66107 DSH |
2523 | } |
2524 | if (!tls1_process_sigalgs(s)) { | |
e077455e | 2525 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_SSL_LIB); |
f63a17d6 | 2526 | return MSG_PROCESS_ERROR; |
32f66107 | 2527 | } |
0f113f3e | 2528 | } |
0f113f3e | 2529 | |
32f66107 | 2530 | /* get the CA RDNs */ |
f63a17d6 MC |
2531 | if (!parse_ca_names(s, pkt)) { |
2532 | /* SSLfatal() already called */ | |
2533 | return MSG_PROCESS_ERROR; | |
2534 | } | |
03f44b97 DSH |
2535 | } |
2536 | ||
2537 | if (PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 2538 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2539 | return MSG_PROCESS_ERROR; |
03f44b97 | 2540 | } |
0f113f3e | 2541 | |
0f113f3e | 2542 | /* we should setup a certificate to return.... */ |
555cbb32 | 2543 | s->s3.tmp.cert_req = 1; |
0f113f3e | 2544 | |
e4562014 MC |
2545 | /* |
2546 | * In TLSv1.3 we don't prepare the client certificate yet. We wait until | |
2547 | * after the CertificateVerify message has been received. This is because | |
2548 | * in TLSv1.3 the CertificateRequest arrives before the Certificate message | |
2549 | * but in TLSv1.2 it is the other way around. We want to make sure that | |
8c2bfd25 | 2550 | * SSL_get1_peer_certificate() returns something sensible in |
e4562014 MC |
2551 | * client_cert_cb. |
2552 | */ | |
38b051a1 TM |
2553 | if (SSL_CONNECTION_IS_TLS13(s) |
2554 | && s->post_handshake_auth != SSL_PHA_REQUESTED) | |
e4562014 MC |
2555 | return MSG_PROCESS_CONTINUE_READING; |
2556 | ||
f63a17d6 | 2557 | return MSG_PROCESS_CONTINUE_PROCESSING; |
0f113f3e MC |
2558 | } |
2559 | ||
38b051a1 TM |
2560 | MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL_CONNECTION *s, |
2561 | PACKET *pkt) | |
b9908bf9 | 2562 | { |
b9908bf9 | 2563 | unsigned int ticklen; |
9ac6244b | 2564 | unsigned long ticket_lifetime_hint, age_add = 0; |
ec60ccc1 | 2565 | unsigned int sess_len; |
de1df7e9 | 2566 | RAW_EXTENSION *exts = NULL; |
9b6a8254 | 2567 | PACKET nonce; |
abd86cec | 2568 | EVP_MD *sha256 = NULL; |
38b051a1 | 2569 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
b9908bf9 | 2570 | |
6cf2dbd9 MC |
2571 | PACKET_null_init(&nonce); |
2572 | ||
73999b62 | 2573 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint) |
38b051a1 | 2574 | || (SSL_CONNECTION_IS_TLS13(s) |
9b6a8254 | 2575 | && (!PACKET_get_net_4(pkt, &age_add) |
6cf2dbd9 | 2576 | || !PACKET_get_length_prefixed_1(pkt, &nonce))) |
a230b26e | 2577 | || !PACKET_get_net_2(pkt, &ticklen) |
38b051a1 TM |
2578 | || (SSL_CONNECTION_IS_TLS13(s) ? (ticklen == 0 |
2579 | || PACKET_remaining(pkt) < ticklen) | |
2580 | : PACKET_remaining(pkt) != ticklen)) { | |
c48ffbcc | 2581 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2582 | goto err; |
e711da71 EK |
2583 | } |
2584 | ||
de1df7e9 MC |
2585 | /* |
2586 | * Server is allowed to change its mind (in <=TLSv1.2) and send an empty | |
2587 | * ticket. We already checked this TLSv1.3 case above, so it should never | |
2588 | * be 0 here in that instance | |
2589 | */ | |
e711da71 | 2590 | if (ticklen == 0) |
c9de4a20 | 2591 | return MSG_PROCESS_CONTINUE_READING; |
e711da71 | 2592 | |
150840b9 MC |
2593 | /* |
2594 | * Sessions must be immutable once they go into the session cache. Otherwise | |
2595 | * we can get multi-thread problems. Therefore we don't "update" sessions, | |
2596 | * we replace them with a duplicate. In TLSv1.3 we need to do this every | |
2597 | * time a NewSessionTicket arrives because those messages arrive | |
2598 | * post-handshake and the session may have already gone into the session | |
2599 | * cache. | |
2600 | */ | |
38b051a1 | 2601 | if (SSL_CONNECTION_IS_TLS13(s) || s->session->session_id_length > 0) { |
98ece4ee | 2602 | SSL_SESSION *new_sess; |
1f156321 | 2603 | |
98ece4ee MC |
2604 | /* |
2605 | * We reused an existing session, so we need to replace it with a new | |
2606 | * one | |
2607 | */ | |
5d61491c | 2608 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { |
e077455e | 2609 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_SSL_LIB); |
f63a17d6 | 2610 | goto err; |
5d61491c MC |
2611 | } |
2612 | ||
1f156321 | 2613 | if ((s->session_ctx->session_cache_mode & SSL_SESS_CACHE_CLIENT) != 0 |
38b051a1 | 2614 | && !SSL_CONNECTION_IS_TLS13(s)) { |
1f156321 MC |
2615 | /* |
2616 | * In TLSv1.2 and below the arrival of a new tickets signals that | |
2617 | * any old ticket we were using is now out of date, so we remove the | |
2618 | * old session from the cache. We carry on if this fails | |
2619 | */ | |
2620 | SSL_CTX_remove_session(s->session_ctx, s->session); | |
2621 | } | |
2622 | ||
98ece4ee MC |
2623 | SSL_SESSION_free(s->session); |
2624 | s->session = new_sess; | |
2625 | } | |
2626 | ||
f0131dc0 | 2627 | s->session->time = ossl_time_now(); |
25959e04 | 2628 | ssl_session_calculate_timeout(s->session); |
fc24f0bf | 2629 | |
aff8c126 RS |
2630 | OPENSSL_free(s->session->ext.tick); |
2631 | s->session->ext.tick = NULL; | |
2632 | s->session->ext.ticklen = 0; | |
e711da71 | 2633 | |
aff8c126 RS |
2634 | s->session->ext.tick = OPENSSL_malloc(ticklen); |
2635 | if (s->session->ext.tick == NULL) { | |
e077455e | 2636 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
0f113f3e MC |
2637 | goto err; |
2638 | } | |
aff8c126 | 2639 | if (!PACKET_copy_bytes(pkt, s->session->ext.tick, ticklen)) { |
c48ffbcc | 2640 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2641 | goto err; |
561e12bb | 2642 | } |
e711da71 | 2643 | |
aff8c126 | 2644 | s->session->ext.tick_lifetime_hint = ticket_lifetime_hint; |
fc24f0bf | 2645 | s->session->ext.tick_age_add = age_add; |
aff8c126 | 2646 | s->session->ext.ticklen = ticklen; |
de1df7e9 | 2647 | |
38b051a1 | 2648 | if (SSL_CONNECTION_IS_TLS13(s)) { |
de1df7e9 MC |
2649 | PACKET extpkt; |
2650 | ||
2651 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt) | |
1cde0259 | 2652 | || PACKET_remaining(pkt) != 0) { |
c48ffbcc | 2653 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
1cde0259 MC |
2654 | goto err; |
2655 | } | |
2656 | ||
2657 | if (!tls_collect_extensions(s, &extpkt, | |
2658 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET, &exts, | |
2659 | NULL, 1) | |
fe874d27 MC |
2660 | || !tls_parse_all_extensions(s, |
2661 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET, | |
f63a17d6 MC |
2662 | exts, NULL, 0, 1)) { |
2663 | /* SSLfatal() already called */ | |
2664 | goto err; | |
de1df7e9 MC |
2665 | } |
2666 | } | |
2667 | ||
0f113f3e MC |
2668 | /* |
2669 | * There are two ways to detect a resumed ticket session. One is to set | |
2670 | * an appropriate session ID and then the server must return a match in | |
2671 | * ServerHello. This allows the normal client session ID matching to work | |
2672 | * and we know much earlier that the ticket has been accepted. The | |
2673 | * other way is to set zero length session ID when the ticket is | |
2674 | * presented and rely on the handshake to determine session resumption. | |
2675 | * We choose the former approach because this fits in with assumptions | |
abd86cec MC |
2676 | * elsewhere in OpenSSL. The session ID is set to the SHA256 hash of the |
2677 | * ticket. | |
0f113f3e | 2678 | */ |
38b051a1 | 2679 | sha256 = EVP_MD_fetch(sctx->libctx, "SHA2-256", sctx->propq); |
abd86cec | 2680 | if (sha256 == NULL) { |
5a2d0ef3 RL |
2681 | /* Error is already recorded */ |
2682 | SSLfatal_alert(s, SSL_AD_INTERNAL_ERROR); | |
abd86cec MC |
2683 | goto err; |
2684 | } | |
ec60ccc1 | 2685 | /* |
407820c0 | 2686 | * We use sess_len here because EVP_Digest expects an int |
ec60ccc1 MC |
2687 | * but s->session->session_id_length is a size_t |
2688 | */ | |
aff8c126 | 2689 | if (!EVP_Digest(s->session->ext.tick, ticklen, |
ec60ccc1 | 2690 | s->session->session_id, &sess_len, |
abd86cec | 2691 | sha256, NULL)) { |
c48ffbcc | 2692 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
d166ed8c DSH |
2693 | goto err; |
2694 | } | |
abd86cec MC |
2695 | EVP_MD_free(sha256); |
2696 | sha256 = NULL; | |
ec60ccc1 | 2697 | s->session->session_id_length = sess_len; |
4cb00457 | 2698 | s->session->not_resumable = 0; |
de1df7e9 MC |
2699 | |
2700 | /* This is a standalone message in TLSv1.3, so there is no more to read */ | |
38b051a1 | 2701 | if (SSL_CONNECTION_IS_TLS13(s)) { |
4ff1a526 | 2702 | const EVP_MD *md = ssl_handshake_md(s); |
ed576acd | 2703 | int hashleni = EVP_MD_get_size(md); |
4ff1a526 MC |
2704 | size_t hashlen; |
2705 | static const unsigned char nonce_label[] = "resumption"; | |
2706 | ||
2707 | /* Ensure cast to size_t is safe */ | |
2708 | if (!ossl_assert(hashleni >= 0)) { | |
c48ffbcc | 2709 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
4ff1a526 MC |
2710 | goto err; |
2711 | } | |
2712 | hashlen = (size_t)hashleni; | |
2713 | ||
2714 | if (!tls13_hkdf_expand(s, md, s->resumption_master_secret, | |
2715 | nonce_label, | |
2716 | sizeof(nonce_label) - 1, | |
6cf2dbd9 MC |
2717 | PACKET_data(&nonce), |
2718 | PACKET_remaining(&nonce), | |
4ff1a526 | 2719 | s->session->master_key, |
0fb2815b | 2720 | hashlen, 1)) { |
4ff1a526 MC |
2721 | /* SSLfatal() already called */ |
2722 | goto err; | |
2723 | } | |
2724 | s->session->master_key_length = hashlen; | |
2725 | ||
33d93417 | 2726 | OPENSSL_free(exts); |
de1df7e9 MC |
2727 | ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); |
2728 | return MSG_PROCESS_FINISHED_READING; | |
2729 | } | |
2730 | ||
b9908bf9 | 2731 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2732 | err: |
abd86cec | 2733 | EVP_MD_free(sha256); |
33d93417 | 2734 | OPENSSL_free(exts); |
b9908bf9 | 2735 | return MSG_PROCESS_ERROR; |
0f113f3e | 2736 | } |
67c8e7f4 | 2737 | |
f63e4288 MC |
2738 | /* |
2739 | * In TLSv1.3 this is called from the extensions code, otherwise it is used to | |
f63a17d6 | 2740 | * parse a separate message. Returns 1 on success or 0 on failure |
f63e4288 | 2741 | */ |
38b051a1 | 2742 | int tls_process_cert_status_body(SSL_CONNECTION *s, PACKET *pkt) |
b9908bf9 | 2743 | { |
8b0e934a | 2744 | size_t resplen; |
b9908bf9 | 2745 | unsigned int type; |
b9908bf9 | 2746 | |
73999b62 | 2747 | if (!PACKET_get_1(pkt, &type) |
a230b26e | 2748 | || type != TLSEXT_STATUSTYPE_ocsp) { |
c48ffbcc | 2749 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_UNSUPPORTED_STATUS_TYPE); |
f63e4288 | 2750 | return 0; |
0f113f3e | 2751 | } |
56a26ce3 MC |
2752 | if (!PACKET_get_net_3_len(pkt, &resplen) |
2753 | || PACKET_remaining(pkt) != resplen) { | |
c48ffbcc | 2754 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63e4288 | 2755 | return 0; |
0f113f3e | 2756 | } |
8cbfcc70 RS |
2757 | s->ext.ocsp.resp = OPENSSL_malloc(resplen); |
2758 | if (s->ext.ocsp.resp == NULL) { | |
39a14059 | 2759 | s->ext.ocsp.resp_len = 0; |
e077455e | 2760 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
f63e4288 | 2761 | return 0; |
0f113f3e | 2762 | } |
39a14059 | 2763 | s->ext.ocsp.resp_len = resplen; |
8cbfcc70 | 2764 | if (!PACKET_copy_bytes(pkt, s->ext.ocsp.resp, resplen)) { |
c48ffbcc | 2765 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63e4288 | 2766 | return 0; |
ac63710a | 2767 | } |
f63e4288 MC |
2768 | |
2769 | return 1; | |
2770 | } | |
2faa1b48 | 2771 | |
f63e4288 | 2772 | |
38b051a1 | 2773 | MSG_PROCESS_RETURN tls_process_cert_status(SSL_CONNECTION *s, PACKET *pkt) |
f63e4288 | 2774 | { |
f63a17d6 MC |
2775 | if (!tls_process_cert_status_body(s, pkt)) { |
2776 | /* SSLfatal() already called */ | |
f63e4288 MC |
2777 | return MSG_PROCESS_ERROR; |
2778 | } | |
2779 | ||
b9908bf9 | 2780 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2781 | } |
d02b48c6 | 2782 | |
7776a36c MC |
2783 | /* |
2784 | * Perform miscellaneous checks and processing after we have received the | |
2785 | * server's initial flight. In TLS1.3 this is after the Server Finished message. | |
6530c490 MC |
2786 | * In <=TLS1.2 this is after the ServerDone message. Returns 1 on success or 0 |
2787 | * on failure. | |
7776a36c | 2788 | */ |
38b051a1 | 2789 | int tls_process_initial_server_flight(SSL_CONNECTION *s) |
b9908bf9 | 2790 | { |
38b051a1 TM |
2791 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
2792 | ||
a455d0f6 MC |
2793 | /* |
2794 | * at this point we check that we have the required stuff from | |
2795 | * the server | |
2796 | */ | |
2797 | if (!ssl3_check_cert_and_algorithm(s)) { | |
f63a17d6 | 2798 | /* SSLfatal() already called */ |
7776a36c | 2799 | return 0; |
a455d0f6 MC |
2800 | } |
2801 | ||
bb1aaab4 | 2802 | /* |
aff8c126 RS |
2803 | * Call the ocsp status callback if needed. The |ext.ocsp.resp| and |
2804 | * |ext.ocsp.resp_len| values will be set if we actually received a status | |
bb1aaab4 MC |
2805 | * message, or NULL and -1 otherwise |
2806 | */ | |
aff8c126 | 2807 | if (s->ext.status_type != TLSEXT_STATUSTYPE_nothing |
38b051a1 TM |
2808 | && sctx->ext.status_cb != NULL) { |
2809 | int ret = sctx->ext.status_cb(SSL_CONNECTION_GET_SSL(s), | |
2810 | sctx->ext.status_arg); | |
aff8c126 | 2811 | |
bb1aaab4 | 2812 | if (ret == 0) { |
f63a17d6 | 2813 | SSLfatal(s, SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE, |
f63a17d6 | 2814 | SSL_R_INVALID_STATUS_RESPONSE); |
7776a36c | 2815 | return 0; |
bb1aaab4 MC |
2816 | } |
2817 | if (ret < 0) { | |
c0f4400c DB |
2818 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2819 | SSL_R_OCSP_CALLBACK_FAILURE); | |
7776a36c | 2820 | return 0; |
bb1aaab4 MC |
2821 | } |
2822 | } | |
ed29e82a RP |
2823 | #ifndef OPENSSL_NO_CT |
2824 | if (s->ct_validation_callback != NULL) { | |
43341433 VD |
2825 | /* Note we validate the SCTs whether or not we abort on error */ |
2826 | if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) { | |
f63a17d6 | 2827 | /* SSLfatal() already called */ |
7776a36c | 2828 | return 0; |
ed29e82a RP |
2829 | } |
2830 | } | |
2831 | #endif | |
2832 | ||
7776a36c MC |
2833 | return 1; |
2834 | } | |
2835 | ||
38b051a1 | 2836 | MSG_PROCESS_RETURN tls_process_server_done(SSL_CONNECTION *s, PACKET *pkt) |
7776a36c | 2837 | { |
7776a36c MC |
2838 | if (PACKET_remaining(pkt) > 0) { |
2839 | /* should contain no data */ | |
c48ffbcc | 2840 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2841 | return MSG_PROCESS_ERROR; |
7776a36c MC |
2842 | } |
2843 | #ifndef OPENSSL_NO_SRP | |
555cbb32 | 2844 | if (s->s3.tmp.new_cipher->algorithm_mkey & SSL_kSRP) { |
76cb077f | 2845 | if (ssl_srp_calc_a_param_intern(s) <= 0) { |
c48ffbcc | 2846 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_SRP_A_CALC); |
f63a17d6 | 2847 | return MSG_PROCESS_ERROR; |
7776a36c MC |
2848 | } |
2849 | } | |
2850 | #endif | |
2851 | ||
f63a17d6 MC |
2852 | if (!tls_process_initial_server_flight(s)) { |
2853 | /* SSLfatal() already called */ | |
2854 | return MSG_PROCESS_ERROR; | |
2855 | } | |
7776a36c | 2856 | |
bd79bcb4 | 2857 | return MSG_PROCESS_FINISHED_READING; |
0f113f3e | 2858 | } |
176f31dd | 2859 | |
38b051a1 | 2860 | static int tls_construct_cke_psk_preamble(SSL_CONNECTION *s, WPACKET *pkt) |
0f113f3e | 2861 | { |
7689082b | 2862 | #ifndef OPENSSL_NO_PSK |
13c0ec4a MC |
2863 | int ret = 0; |
2864 | /* | |
2865 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
2866 | * \0-terminated identity. The last byte is for us for simulating | |
2867 | * strnlen. | |
2868 | */ | |
2869 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
2870 | size_t identitylen = 0; | |
2871 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
2872 | unsigned char *tmppsk = NULL; | |
2873 | char *tmpidentity = NULL; | |
2874 | size_t psklen = 0; | |
2875 | ||
2876 | if (s->psk_client_callback == NULL) { | |
c48ffbcc | 2877 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_PSK_NO_CLIENT_CB); |
13c0ec4a MC |
2878 | goto err; |
2879 | } | |
d02b48c6 | 2880 | |
13c0ec4a | 2881 | memset(identity, 0, sizeof(identity)); |
d02b48c6 | 2882 | |
38b051a1 TM |
2883 | psklen = s->psk_client_callback(SSL_CONNECTION_GET_SSL(s), |
2884 | s->session->psk_identity_hint, | |
13c0ec4a MC |
2885 | identity, sizeof(identity) - 1, |
2886 | psk, sizeof(psk)); | |
7689082b | 2887 | |
13c0ec4a | 2888 | if (psklen > PSK_MAX_PSK_LEN) { |
c48ffbcc | 2889 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, ERR_R_INTERNAL_ERROR); |
3de7f014 | 2890 | psklen = PSK_MAX_PSK_LEN; /* Avoid overrunning the array on cleanse */ |
13c0ec4a MC |
2891 | goto err; |
2892 | } else if (psklen == 0) { | |
c48ffbcc | 2893 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_PSK_IDENTITY_NOT_FOUND); |
13c0ec4a MC |
2894 | goto err; |
2895 | } | |
7689082b | 2896 | |
13c0ec4a MC |
2897 | identitylen = strlen(identity); |
2898 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
c48ffbcc | 2899 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2900 | goto err; |
2901 | } | |
7689082b | 2902 | |
13c0ec4a MC |
2903 | tmppsk = OPENSSL_memdup(psk, psklen); |
2904 | tmpidentity = OPENSSL_strdup(identity); | |
2905 | if (tmppsk == NULL || tmpidentity == NULL) { | |
e077455e | 2906 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
13c0ec4a MC |
2907 | goto err; |
2908 | } | |
7689082b | 2909 | |
555cbb32 TS |
2910 | OPENSSL_free(s->s3.tmp.psk); |
2911 | s->s3.tmp.psk = tmppsk; | |
2912 | s->s3.tmp.psklen = psklen; | |
13c0ec4a MC |
2913 | tmppsk = NULL; |
2914 | OPENSSL_free(s->session->psk_identity); | |
2915 | s->session->psk_identity = tmpidentity; | |
2916 | tmpidentity = NULL; | |
f1ec23c0 | 2917 | |
b2b3024e | 2918 | if (!WPACKET_sub_memcpy_u16(pkt, identity, identitylen)) { |
c48ffbcc | 2919 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 MC |
2920 | goto err; |
2921 | } | |
7689082b | 2922 | |
13c0ec4a | 2923 | ret = 1; |
0bce0b02 | 2924 | |
13c0ec4a MC |
2925 | err: |
2926 | OPENSSL_cleanse(psk, psklen); | |
2927 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2928 | OPENSSL_clear_free(tmppsk, psklen); | |
2929 | OPENSSL_clear_free(tmpidentity, identitylen); | |
d02b48c6 | 2930 | |
13c0ec4a MC |
2931 | return ret; |
2932 | #else | |
c48ffbcc | 2933 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
13c0ec4a | 2934 | return 0; |
b9908bf9 | 2935 | #endif |
13c0ec4a | 2936 | } |
b9908bf9 | 2937 | |
38b051a1 | 2938 | static int tls_construct_cke_rsa(SSL_CONNECTION *s, WPACKET *pkt) |
13c0ec4a | 2939 | { |
f1ec23c0 | 2940 | unsigned char *encdata = NULL; |
13c0ec4a MC |
2941 | EVP_PKEY *pkey = NULL; |
2942 | EVP_PKEY_CTX *pctx = NULL; | |
2943 | size_t enclen; | |
2944 | unsigned char *pms = NULL; | |
2945 | size_t pmslen = 0; | |
38b051a1 | 2946 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
b9908bf9 | 2947 | |
13c0ec4a MC |
2948 | if (s->session->peer == NULL) { |
2949 | /* | |
2950 | * We should always have a server certificate with SSL_kRSA. | |
2951 | */ | |
c48ffbcc | 2952 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2953 | return 0; |
2954 | } | |
0f113f3e | 2955 | |
13c0ec4a | 2956 | pkey = X509_get0_pubkey(s->session->peer); |
d7e498ac | 2957 | if (!EVP_PKEY_is_a(pkey, "RSA")) { |
c48ffbcc | 2958 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2959 | return 0; |
2960 | } | |
0f113f3e | 2961 | |
13c0ec4a MC |
2962 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; |
2963 | pms = OPENSSL_malloc(pmslen); | |
2964 | if (pms == NULL) { | |
e077455e | 2965 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
13c0ec4a MC |
2966 | return 0; |
2967 | } | |
0bce0b02 | 2968 | |
13c0ec4a MC |
2969 | pms[0] = s->client_version >> 8; |
2970 | pms[1] = s->client_version & 0xff; | |
38b051a1 | 2971 | if (RAND_bytes_ex(sctx->libctx, pms + 2, pmslen - 2, 0) <= 0) { |
e077455e | 2972 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_RAND_LIB); |
13c0ec4a MC |
2973 | goto err; |
2974 | } | |
0f113f3e | 2975 | |
13c0ec4a | 2976 | /* Fix buf for TLS and beyond */ |
f1ec23c0 | 2977 | if (s->version > SSL3_VERSION && !WPACKET_start_sub_packet_u16(pkt)) { |
c48ffbcc | 2978 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 MC |
2979 | goto err; |
2980 | } | |
3aceb9ec | 2981 | |
38b051a1 | 2982 | pctx = EVP_PKEY_CTX_new_from_pkey(sctx->libctx, pkey, sctx->propq); |
13c0ec4a MC |
2983 | if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0 |
2984 | || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) { | |
c48ffbcc | 2985 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
13c0ec4a MC |
2986 | goto err; |
2987 | } | |
f1ec23c0 MC |
2988 | if (!WPACKET_allocate_bytes(pkt, enclen, &encdata) |
2989 | || EVP_PKEY_encrypt(pctx, encdata, &enclen, pms, pmslen) <= 0) { | |
c48ffbcc | 2990 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_RSA_ENCRYPT); |
13c0ec4a MC |
2991 | goto err; |
2992 | } | |
13c0ec4a MC |
2993 | EVP_PKEY_CTX_free(pctx); |
2994 | pctx = NULL; | |
0f113f3e | 2995 | |
13c0ec4a | 2996 | /* Fix buf for TLS and beyond */ |
f1ec23c0 | 2997 | if (s->version > SSL3_VERSION && !WPACKET_close(pkt)) { |
c48ffbcc | 2998 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 | 2999 | goto err; |
b9908bf9 | 3000 | } |
13c0ec4a | 3001 | |
2faa1b48 | 3002 | /* Log the premaster secret, if logging is enabled. */ |
a2c2e000 MC |
3003 | if (!ssl_log_rsa_client_key_exchange(s, encdata, enclen, pms, pmslen)) { |
3004 | /* SSLfatal() already called */ | |
2faa1b48 | 3005 | goto err; |
a2c2e000 | 3006 | } |
2faa1b48 | 3007 | |
555cbb32 TS |
3008 | s->s3.tmp.pms = pms; |
3009 | s->s3.tmp.pmslen = pmslen; | |
26fb4b03 | 3010 | |
13c0ec4a MC |
3011 | return 1; |
3012 | err: | |
3013 | OPENSSL_clear_free(pms, pmslen); | |
3014 | EVP_PKEY_CTX_free(pctx); | |
3015 | ||
3016 | return 0; | |
13c0ec4a MC |
3017 | } |
3018 | ||
38b051a1 | 3019 | static int tls_construct_cke_dhe(SSL_CONNECTION *s, WPACKET *pkt) |
a8c1c704 | 3020 | { |
a8c1c704 | 3021 | EVP_PKEY *ckey = NULL, *skey = NULL; |
f1ec23c0 | 3022 | unsigned char *keybytes = NULL; |
807b0a1d | 3023 | int prime_len; |
cb5a427a MC |
3024 | unsigned char *encoded_pub = NULL; |
3025 | size_t encoded_pub_len, pad_len; | |
3026 | int ret = 0; | |
a8c1c704 | 3027 | |
555cbb32 | 3028 | skey = s->s3.peer_tmp; |
a2c2e000 | 3029 | if (skey == NULL) { |
c48ffbcc | 3030 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 | 3031 | goto err; |
a2c2e000 | 3032 | } |
f1ec23c0 | 3033 | |
0f00ed77 | 3034 | ckey = ssl_generate_pkey(s, skey); |
a2c2e000 | 3035 | if (ckey == NULL) { |
c48ffbcc | 3036 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b599ce3b | 3037 | goto err; |
a2c2e000 | 3038 | } |
b599ce3b | 3039 | |
a2c2e000 MC |
3040 | if (ssl_derive(s, ckey, skey, 0) == 0) { |
3041 | /* SSLfatal() already called */ | |
f1ec23c0 | 3042 | goto err; |
a2c2e000 | 3043 | } |
a8c1c704 MC |
3044 | |
3045 | /* send off the data */ | |
cb5a427a MC |
3046 | |
3047 | /* Generate encoding of server key */ | |
3048 | encoded_pub_len = EVP_PKEY_get1_encoded_public_key(ckey, &encoded_pub); | |
3049 | if (encoded_pub_len == 0) { | |
3050 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
10481d33 | 3051 | EVP_PKEY_free(ckey); |
cb5a427a MC |
3052 | return EXT_RETURN_FAIL; |
3053 | } | |
3054 | ||
807b0a1d FM |
3055 | /* |
3056 | * For interoperability with some versions of the Microsoft TLS | |
3057 | * stack, we need to zero pad the DHE pub key to the same length | |
cb5a427a | 3058 | * as the prime. |
807b0a1d | 3059 | */ |
ed576acd | 3060 | prime_len = EVP_PKEY_get_size(ckey); |
cb5a427a MC |
3061 | pad_len = prime_len - encoded_pub_len; |
3062 | if (pad_len > 0) { | |
3063 | if (!WPACKET_sub_allocate_bytes_u16(pkt, pad_len, &keybytes)) { | |
3064 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
3065 | goto err; | |
3066 | } | |
3067 | memset(keybytes, 0, pad_len); | |
3068 | } | |
3069 | ||
3070 | if (!WPACKET_sub_memcpy_u16(pkt, encoded_pub, encoded_pub_len)) { | |
c48ffbcc | 3071 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 | 3072 | goto err; |
a2c2e000 | 3073 | } |
f1ec23c0 | 3074 | |
cb5a427a | 3075 | ret = 1; |
f1ec23c0 | 3076 | err: |
cb5a427a | 3077 | OPENSSL_free(encoded_pub); |
f1ec23c0 | 3078 | EVP_PKEY_free(ckey); |
cb5a427a | 3079 | return ret; |
a8c1c704 MC |
3080 | } |
3081 | ||
38b051a1 | 3082 | static int tls_construct_cke_ecdhe(SSL_CONNECTION *s, WPACKET *pkt) |
67ad5aab | 3083 | { |
67ad5aab | 3084 | unsigned char *encodedPoint = NULL; |
348240c6 | 3085 | size_t encoded_pt_len = 0; |
67ad5aab | 3086 | EVP_PKEY *ckey = NULL, *skey = NULL; |
f1ec23c0 | 3087 | int ret = 0; |
67ad5aab | 3088 | |
555cbb32 | 3089 | skey = s->s3.peer_tmp; |
ec24630a | 3090 | if (skey == NULL) { |
c48ffbcc | 3091 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
3092 | return 0; |
3093 | } | |
3094 | ||
0f00ed77 | 3095 | ckey = ssl_generate_pkey(s, skey); |
b599ce3b | 3096 | if (ckey == NULL) { |
e077455e | 3097 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_SSL_LIB); |
b599ce3b MC |
3098 | goto err; |
3099 | } | |
67ad5aab | 3100 | |
0f1e51ea | 3101 | if (ssl_derive(s, ckey, skey, 0) == 0) { |
a2c2e000 | 3102 | /* SSLfatal() already called */ |
67ad5aab MC |
3103 | goto err; |
3104 | } | |
3105 | ||
3106 | /* Generate encoding of client key */ | |
5ac8fb58 | 3107 | encoded_pt_len = EVP_PKEY_get1_encoded_public_key(ckey, &encodedPoint); |
67ad5aab MC |
3108 | |
3109 | if (encoded_pt_len == 0) { | |
c48ffbcc | 3110 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EC_LIB); |
67ad5aab MC |
3111 | goto err; |
3112 | } | |
3113 | ||
b2b3024e | 3114 | if (!WPACKET_sub_memcpy_u8(pkt, encodedPoint, encoded_pt_len)) { |
c48ffbcc | 3115 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 MC |
3116 | goto err; |
3117 | } | |
67ad5aab | 3118 | |
f1ec23c0 | 3119 | ret = 1; |
67ad5aab | 3120 | err: |
f1ec23c0 | 3121 | OPENSSL_free(encodedPoint); |
67ad5aab | 3122 | EVP_PKEY_free(ckey); |
f1ec23c0 | 3123 | return ret; |
67ad5aab MC |
3124 | } |
3125 | ||
38b051a1 | 3126 | static int tls_construct_cke_gost(SSL_CONNECTION *s, WPACKET *pkt) |
e00e0b3d MC |
3127 | { |
3128 | #ifndef OPENSSL_NO_GOST | |
3129 | /* GOST key exchange message creation */ | |
3130 | EVP_PKEY_CTX *pkey_ctx = NULL; | |
3131 | X509 *peer_cert; | |
3132 | size_t msglen; | |
3133 | unsigned int md_len; | |
3134 | unsigned char shared_ukm[32], tmp[256]; | |
3135 | EVP_MD_CTX *ukm_hash = NULL; | |
3136 | int dgst_nid = NID_id_GostR3411_94; | |
3137 | unsigned char *pms = NULL; | |
3138 | size_t pmslen = 0; | |
38b051a1 | 3139 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
e00e0b3d | 3140 | |
555cbb32 | 3141 | if ((s->s3.tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0) |
e00e0b3d MC |
3142 | dgst_nid = NID_id_GostR3411_2012_256; |
3143 | ||
3144 | /* | |
1ee4b98e | 3145 | * Get server certificate PKEY and create ctx from it |
e00e0b3d MC |
3146 | */ |
3147 | peer_cert = s->session->peer; | |
12a765a5 | 3148 | if (peer_cert == NULL) { |
c48ffbcc RL |
3149 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
3150 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); | |
e00e0b3d MC |
3151 | return 0; |
3152 | } | |
3153 | ||
38b051a1 | 3154 | pkey_ctx = EVP_PKEY_CTX_new_from_pkey(sctx->libctx, |
0f00ed77 | 3155 | X509_get0_pubkey(peer_cert), |
38b051a1 | 3156 | sctx->propq); |
e00e0b3d | 3157 | if (pkey_ctx == NULL) { |
e077455e | 3158 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
e00e0b3d MC |
3159 | return 0; |
3160 | } | |
3161 | /* | |
3162 | * If we have send a certificate, and certificate key | |
3163 | * parameters match those of server certificate, use | |
3164 | * certificate key for key exchange | |
3165 | */ | |
3166 | ||
3167 | /* Otherwise, generate ephemeral key pair */ | |
3168 | pmslen = 32; | |
3169 | pms = OPENSSL_malloc(pmslen); | |
3170 | if (pms == NULL) { | |
e077455e | 3171 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
2f3930bc | 3172 | goto err; |
e00e0b3d MC |
3173 | } |
3174 | ||
3175 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0 | |
348240c6 | 3176 | /* Generate session key |
348240c6 | 3177 | */ |
38b051a1 | 3178 | || RAND_bytes_ex(sctx->libctx, pms, pmslen, 0) <= 0) { |
c48ffbcc | 3179 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
3180 | goto err; |
3181 | }; | |
e00e0b3d MC |
3182 | /* |
3183 | * Compute shared IV and store it in algorithm-specific context | |
3184 | * data | |
3185 | */ | |
3186 | ukm_hash = EVP_MD_CTX_new(); | |
3187 | if (ukm_hash == NULL | |
a230b26e | 3188 | || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0 |
555cbb32 | 3189 | || EVP_DigestUpdate(ukm_hash, s->s3.client_random, |
a230b26e | 3190 | SSL3_RANDOM_SIZE) <= 0 |
555cbb32 | 3191 | || EVP_DigestUpdate(ukm_hash, s->s3.server_random, |
a230b26e EK |
3192 | SSL3_RANDOM_SIZE) <= 0 |
3193 | || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) { | |
c48ffbcc | 3194 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
3195 | goto err; |
3196 | } | |
3197 | EVP_MD_CTX_free(ukm_hash); | |
3198 | ukm_hash = NULL; | |
3199 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
7b1264ba | 3200 | EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) <= 0) { |
c48ffbcc | 3201 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
3202 | goto err; |
3203 | } | |
3204 | /* Make GOST keytransport blob message */ | |
3205 | /* | |
3206 | * Encapsulate it into sequence | |
3207 | */ | |
e00e0b3d MC |
3208 | msglen = 255; |
3209 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) { | |
c48ffbcc | 3210 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
3211 | goto err; |
3212 | } | |
f1ec23c0 | 3213 | |
08029dfa MC |
3214 | if (!WPACKET_put_bytes_u8(pkt, V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED) |
3215 | || (msglen >= 0x80 && !WPACKET_put_bytes_u8(pkt, 0x81)) | |
b2b3024e | 3216 | || !WPACKET_sub_memcpy_u8(pkt, tmp, msglen)) { |
c48ffbcc | 3217 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 | 3218 | goto err; |
e00e0b3d | 3219 | } |
f1ec23c0 | 3220 | |
e00e0b3d | 3221 | EVP_PKEY_CTX_free(pkey_ctx); |
555cbb32 TS |
3222 | s->s3.tmp.pms = pms; |
3223 | s->s3.tmp.pmslen = pmslen; | |
e00e0b3d MC |
3224 | |
3225 | return 1; | |
3226 | err: | |
3227 | EVP_PKEY_CTX_free(pkey_ctx); | |
3228 | OPENSSL_clear_free(pms, pmslen); | |
3229 | EVP_MD_CTX_free(ukm_hash); | |
3230 | return 0; | |
3231 | #else | |
c48ffbcc | 3232 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
3233 | return 0; |
3234 | #endif | |
3235 | } | |
3236 | ||
5a5530a2 | 3237 | #ifndef OPENSSL_NO_GOST |
38b051a1 | 3238 | int ossl_gost18_cke_cipher_nid(const SSL_CONNECTION *s) |
5a5530a2 DB |
3239 | { |
3240 | if ((s->s3.tmp.new_cipher->algorithm_enc & SSL_MAGMA) != 0) | |
3241 | return NID_magma_ctr; | |
3242 | else if ((s->s3.tmp.new_cipher->algorithm_enc & SSL_KUZNYECHIK) != 0) | |
3243 | return NID_kuznyechik_ctr; | |
3244 | ||
3245 | return NID_undef; | |
3246 | } | |
3247 | ||
38b051a1 | 3248 | int ossl_gost_ukm(const SSL_CONNECTION *s, unsigned char *dgst_buf) |
5a5530a2 DB |
3249 | { |
3250 | EVP_MD_CTX * hash = NULL; | |
3251 | unsigned int md_len; | |
38b051a1 TM |
3252 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
3253 | const EVP_MD *md = ssl_evp_md_fetch(sctx->libctx, NID_id_GostR3411_2012_256, | |
3254 | sctx->propq); | |
5a5530a2 DB |
3255 | |
3256 | if (md == NULL) | |
3257 | return 0; | |
3258 | ||
3259 | if ((hash = EVP_MD_CTX_new()) == NULL | |
3260 | || EVP_DigestInit(hash, md) <= 0 | |
3261 | || EVP_DigestUpdate(hash, s->s3.client_random, SSL3_RANDOM_SIZE) <= 0 | |
3262 | || EVP_DigestUpdate(hash, s->s3.server_random, SSL3_RANDOM_SIZE) <= 0 | |
3263 | || EVP_DigestFinal_ex(hash, dgst_buf, &md_len) <= 0) { | |
3264 | EVP_MD_CTX_free(hash); | |
3265 | ssl_evp_md_free(md); | |
3266 | return 0; | |
3267 | } | |
3268 | ||
3269 | EVP_MD_CTX_free(hash); | |
3270 | ssl_evp_md_free(md); | |
3271 | return 1; | |
3272 | } | |
3273 | #endif | |
3274 | ||
38b051a1 | 3275 | static int tls_construct_cke_gost18(SSL_CONNECTION *s, WPACKET *pkt) |
5a5530a2 DB |
3276 | { |
3277 | #ifndef OPENSSL_NO_GOST | |
3278 | /* GOST 2018 key exchange message creation */ | |
2b5e8999 DB |
3279 | unsigned char rnd_dgst[32]; |
3280 | unsigned char *encdata = NULL; | |
5a5530a2 DB |
3281 | EVP_PKEY_CTX *pkey_ctx = NULL; |
3282 | X509 *peer_cert; | |
3283 | unsigned char *pms = NULL; | |
3284 | size_t pmslen = 0; | |
3285 | size_t msglen; | |
6dd4b77a | 3286 | int cipher_nid = ossl_gost18_cke_cipher_nid(s); |
38b051a1 | 3287 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
5a5530a2 DB |
3288 | |
3289 | if (cipher_nid == NID_undef) { | |
c48ffbcc | 3290 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
5a5530a2 DB |
3291 | return 0; |
3292 | } | |
3293 | ||
6dd4b77a | 3294 | if (ossl_gost_ukm(s, rnd_dgst) <= 0) { |
c48ffbcc | 3295 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
5a5530a2 DB |
3296 | goto err; |
3297 | } | |
3298 | ||
3299 | /* Pre-master secret - random bytes */ | |
3300 | pmslen = 32; | |
3301 | pms = OPENSSL_malloc(pmslen); | |
3302 | if (pms == NULL) { | |
e077455e | 3303 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
5a5530a2 DB |
3304 | goto err; |
3305 | } | |
3306 | ||
38b051a1 | 3307 | if (RAND_bytes_ex(sctx->libctx, pms, pmslen, 0) <= 0) { |
c48ffbcc | 3308 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
5a5530a2 DB |
3309 | goto err; |
3310 | } | |
3311 | ||
3312 | /* Get server certificate PKEY and create ctx from it */ | |
3313 | peer_cert = s->session->peer; | |
3314 | if (peer_cert == NULL) { | |
c48ffbcc RL |
3315 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
3316 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); | |
1b87116a | 3317 | goto err; |
5a5530a2 DB |
3318 | } |
3319 | ||
38b051a1 | 3320 | pkey_ctx = EVP_PKEY_CTX_new_from_pkey(sctx->libctx, |
c48ffbcc | 3321 | X509_get0_pubkey(peer_cert), |
38b051a1 | 3322 | sctx->propq); |
5a5530a2 | 3323 | if (pkey_ctx == NULL) { |
e077455e | 3324 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
1b87116a | 3325 | goto err; |
5a5530a2 DB |
3326 | } |
3327 | ||
1287dabd | 3328 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0) { |
c48ffbcc | 3329 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
5a5530a2 DB |
3330 | goto err; |
3331 | }; | |
3332 | ||
3333 | /* Reuse EVP_PKEY_CTRL_SET_IV, make choice in engine code */ | |
3334 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
7b1264ba | 3335 | EVP_PKEY_CTRL_SET_IV, 32, rnd_dgst) <= 0) { |
c48ffbcc | 3336 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_LIBRARY_BUG); |
5a5530a2 DB |
3337 | goto err; |
3338 | } | |
3339 | ||
3340 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
7b1264ba | 3341 | EVP_PKEY_CTRL_CIPHER, cipher_nid, NULL) <= 0) { |
c48ffbcc | 3342 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_LIBRARY_BUG); |
5a5530a2 DB |
3343 | goto err; |
3344 | } | |
3345 | ||
2b5e8999 DB |
3346 | if (EVP_PKEY_encrypt(pkey_ctx, NULL, &msglen, pms, pmslen) <= 0) { |
3347 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); | |
5a5530a2 DB |
3348 | goto err; |
3349 | } | |
3350 | ||
2b5e8999 DB |
3351 | if (!WPACKET_allocate_bytes(pkt, msglen, &encdata) |
3352 | || EVP_PKEY_encrypt(pkey_ctx, encdata, &msglen, pms, pmslen) <= 0) { | |
3353 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); | |
5a5530a2 DB |
3354 | goto err; |
3355 | } | |
3356 | ||
3357 | EVP_PKEY_CTX_free(pkey_ctx); | |
2b5e8999 | 3358 | pkey_ctx = NULL; |
5a5530a2 DB |
3359 | s->s3.tmp.pms = pms; |
3360 | s->s3.tmp.pmslen = pmslen; | |
3361 | ||
3362 | return 1; | |
3363 | err: | |
3364 | EVP_PKEY_CTX_free(pkey_ctx); | |
3365 | OPENSSL_clear_free(pms, pmslen); | |
3366 | return 0; | |
3367 | #else | |
c48ffbcc | 3368 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
5a5530a2 DB |
3369 | return 0; |
3370 | #endif | |
3371 | } | |
3372 | ||
38b051a1 | 3373 | static int tls_construct_cke_srp(SSL_CONNECTION *s, WPACKET *pkt) |
840a2bf8 | 3374 | { |
8b9546c7 | 3375 | #ifndef OPENSSL_NO_SRP |
f1ec23c0 MC |
3376 | unsigned char *abytes = NULL; |
3377 | ||
3378 | if (s->srp_ctx.A == NULL | |
b2b3024e MC |
3379 | || !WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(s->srp_ctx.A), |
3380 | &abytes)) { | |
c48ffbcc | 3381 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
3382 | return 0; |
3383 | } | |
f1ec23c0 MC |
3384 | BN_bn2bin(s->srp_ctx.A, abytes); |
3385 | ||
840a2bf8 MC |
3386 | OPENSSL_free(s->session->srp_username); |
3387 | s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login); | |
3388 | if (s->session->srp_username == NULL) { | |
e077455e | 3389 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
840a2bf8 MC |
3390 | return 0; |
3391 | } | |
3392 | ||
3393 | return 1; | |
3394 | #else | |
c48ffbcc | 3395 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
3396 | return 0; |
3397 | #endif | |
3398 | } | |
3399 | ||
67ec6d2b MC |
3400 | CON_FUNC_RETURN tls_construct_client_key_exchange(SSL_CONNECTION *s, |
3401 | WPACKET *pkt) | |
13c0ec4a | 3402 | { |
13c0ec4a | 3403 | unsigned long alg_k; |
13c0ec4a | 3404 | |
555cbb32 | 3405 | alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
13c0ec4a | 3406 | |
a2c2e000 MC |
3407 | /* |
3408 | * All of the construct functions below call SSLfatal() if necessary so | |
3409 | * no need to do so here. | |
3410 | */ | |
13c0ec4a | 3411 | if ((alg_k & SSL_PSK) |
a2c2e000 | 3412 | && !tls_construct_cke_psk_preamble(s, pkt)) |
13c0ec4a MC |
3413 | goto err; |
3414 | ||
f1ec23c0 | 3415 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
a2c2e000 | 3416 | if (!tls_construct_cke_rsa(s, pkt)) |
13c0ec4a | 3417 | goto err; |
a8c1c704 | 3418 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
a2c2e000 | 3419 | if (!tls_construct_cke_dhe(s, pkt)) |
b9908bf9 | 3420 | goto err; |
67ad5aab | 3421 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
a2c2e000 | 3422 | if (!tls_construct_cke_ecdhe(s, pkt)) |
ce0c1f2b | 3423 | goto err; |
e00e0b3d | 3424 | } else if (alg_k & SSL_kGOST) { |
a2c2e000 | 3425 | if (!tls_construct_cke_gost(s, pkt)) |
a71edf3b | 3426 | goto err; |
5a5530a2 DB |
3427 | } else if (alg_k & SSL_kGOST18) { |
3428 | if (!tls_construct_cke_gost18(s, pkt)) | |
3429 | goto err; | |
840a2bf8 | 3430 | } else if (alg_k & SSL_kSRP) { |
a2c2e000 | 3431 | if (!tls_construct_cke_srp(s, pkt)) |
69f68237 | 3432 | goto err; |
4a424545 | 3433 | } else if (!(alg_k & SSL_kPSK)) { |
c48ffbcc | 3434 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b9908bf9 MC |
3435 | goto err; |
3436 | } | |
3437 | ||
67ec6d2b | 3438 | return CON_FUNC_SUCCESS; |
0f113f3e | 3439 | err: |
555cbb32 TS |
3440 | OPENSSL_clear_free(s->s3.tmp.pms, s->s3.tmp.pmslen); |
3441 | s->s3.tmp.pms = NULL; | |
39a14059 | 3442 | s->s3.tmp.pmslen = 0; |
7689082b | 3443 | #ifndef OPENSSL_NO_PSK |
555cbb32 TS |
3444 | OPENSSL_clear_free(s->s3.tmp.psk, s->s3.tmp.psklen); |
3445 | s->s3.tmp.psk = NULL; | |
39a14059 | 3446 | s->s3.tmp.psklen = 0; |
0f113f3e | 3447 | #endif |
67ec6d2b | 3448 | return CON_FUNC_ERROR; |
b9908bf9 MC |
3449 | } |
3450 | ||
38b051a1 | 3451 | int tls_client_key_exchange_post_work(SSL_CONNECTION *s) |
b9908bf9 MC |
3452 | { |
3453 | unsigned char *pms = NULL; | |
3454 | size_t pmslen = 0; | |
3455 | ||
555cbb32 TS |
3456 | pms = s->s3.tmp.pms; |
3457 | pmslen = s->s3.tmp.pmslen; | |
6f137370 | 3458 | |
b9908bf9 MC |
3459 | #ifndef OPENSSL_NO_SRP |
3460 | /* Check for SRP */ | |
555cbb32 | 3461 | if (s->s3.tmp.new_cipher->algorithm_mkey & SSL_kSRP) { |
b9908bf9 | 3462 | if (!srp_generate_client_master_secret(s)) { |
a2c2e000 | 3463 | /* SSLfatal() already called */ |
b9908bf9 MC |
3464 | goto err; |
3465 | } | |
3466 | return 1; | |
3467 | } | |
3468 | #endif | |
b9908bf9 | 3469 | |
555cbb32 | 3470 | if (pms == NULL && !(s->s3.tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { |
e077455e | 3471 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_PASSED_INVALID_ARGUMENT); |
b9908bf9 MC |
3472 | goto err; |
3473 | } | |
3474 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { | |
a2c2e000 | 3475 | /* SSLfatal() already called */ |
6f137370 MC |
3476 | /* ssl_generate_master_secret frees the pms even on error */ |
3477 | pms = NULL; | |
3478 | pmslen = 0; | |
b9908bf9 MC |
3479 | goto err; |
3480 | } | |
6f137370 MC |
3481 | pms = NULL; |
3482 | pmslen = 0; | |
473483d4 MC |
3483 | |
3484 | #ifndef OPENSSL_NO_SCTP | |
38b051a1 | 3485 | if (SSL_CONNECTION_IS_DTLS(s)) { |
473483d4 MC |
3486 | unsigned char sctpauthkey[64]; |
3487 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
09d62b33 | 3488 | size_t labellen; |
38b051a1 | 3489 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
473483d4 MC |
3490 | |
3491 | /* | |
3492 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP | |
3493 | * used. | |
3494 | */ | |
141eb8c6 MC |
3495 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
3496 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
473483d4 | 3497 | |
09d62b33 MT |
3498 | /* Don't include the terminating zero. */ |
3499 | labellen = sizeof(labelbuffer) - 1; | |
3500 | if (s->mode & SSL_MODE_DTLS_SCTP_LABEL_LENGTH_BUG) | |
3501 | labellen += 1; | |
3502 | ||
38b051a1 | 3503 | if (SSL_export_keying_material(ssl, sctpauthkey, |
a230b26e | 3504 | sizeof(sctpauthkey), labelbuffer, |
09d62b33 | 3505 | labellen, NULL, 0, 0) <= 0) { |
c48ffbcc | 3506 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
473483d4 | 3507 | goto err; |
a2c2e000 | 3508 | } |
473483d4 | 3509 | |
38b051a1 | 3510 | BIO_ctrl(SSL_get_wbio(ssl), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, |
473483d4 MC |
3511 | sizeof(sctpauthkey), sctpauthkey); |
3512 | } | |
3513 | #endif | |
3514 | ||
b9908bf9 MC |
3515 | return 1; |
3516 | err: | |
3517 | OPENSSL_clear_free(pms, pmslen); | |
555cbb32 | 3518 | s->s3.tmp.pms = NULL; |
39a14059 | 3519 | s->s3.tmp.pmslen = 0; |
b9908bf9 | 3520 | return 0; |
0f113f3e | 3521 | } |
d02b48c6 | 3522 | |
0f113f3e MC |
3523 | /* |
3524 | * Check a certificate can be used for client authentication. Currently check | |
3525 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
3526 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 | 3527 | */ |
38b051a1 | 3528 | static int ssl3_check_client_certificate(SSL_CONNECTION *s) |
0f113f3e | 3529 | { |
0f113f3e | 3530 | /* If no suitable signature algorithm can't use certificate */ |
555cbb32 | 3531 | if (!tls_choose_sigalg(s, 0) || s->s3.tmp.sigalg == NULL) |
0f113f3e MC |
3532 | return 0; |
3533 | /* | |
3534 | * If strict mode check suitability of chain before using it. This also | |
3535 | * adjusts suite B digest if necessary. | |
3536 | */ | |
3537 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
3538 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
3539 | return 0; | |
0f113f3e MC |
3540 | return 1; |
3541 | } | |
0d609395 | 3542 | |
38b051a1 | 3543 | WORK_STATE tls_prepare_client_certificate(SSL_CONNECTION *s, WORK_STATE wst) |
0f113f3e MC |
3544 | { |
3545 | X509 *x509 = NULL; | |
3546 | EVP_PKEY *pkey = NULL; | |
3547 | int i; | |
38b051a1 | 3548 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
0f113f3e | 3549 | |
b9908bf9 | 3550 | if (wst == WORK_MORE_A) { |
0f113f3e MC |
3551 | /* Let cert callback update client certificates if required */ |
3552 | if (s->cert->cert_cb) { | |
38b051a1 | 3553 | i = s->cert->cert_cb(ssl, s->cert->cert_cb_arg); |
0f113f3e MC |
3554 | if (i < 0) { |
3555 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3556 | return WORK_MORE_A; |
0f113f3e MC |
3557 | } |
3558 | if (i == 0) { | |
c48ffbcc | 3559 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_CALLBACK_FAILED); |
eb5fd03b | 3560 | return WORK_ERROR; |
0f113f3e MC |
3561 | } |
3562 | s->rwstate = SSL_NOTHING; | |
3563 | } | |
9d75dce3 TS |
3564 | if (ssl3_check_client_certificate(s)) { |
3565 | if (s->post_handshake_auth == SSL_PHA_REQUESTED) { | |
3566 | return WORK_FINISHED_STOP; | |
3567 | } | |
b9908bf9 | 3568 | return WORK_FINISHED_CONTINUE; |
9d75dce3 | 3569 | } |
b9908bf9 MC |
3570 | |
3571 | /* Fall through to WORK_MORE_B */ | |
3572 | wst = WORK_MORE_B; | |
0f113f3e MC |
3573 | } |
3574 | ||
3575 | /* We need to get a client cert */ | |
b9908bf9 | 3576 | if (wst == WORK_MORE_B) { |
0f113f3e MC |
3577 | /* |
3578 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
3579 | * return(-1); We then get retied later | |
3580 | */ | |
0f113f3e MC |
3581 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
3582 | if (i < 0) { | |
3583 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3584 | return WORK_MORE_B; |
0f113f3e MC |
3585 | } |
3586 | s->rwstate = SSL_NOTHING; | |
3587 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
38b051a1 TM |
3588 | if (!SSL_use_certificate(ssl, x509) |
3589 | || !SSL_use_PrivateKey(ssl, pkey)) | |
0f113f3e MC |
3590 | i = 0; |
3591 | } else if (i == 1) { | |
3592 | i = 0; | |
6849b73c | 3593 | ERR_raise(ERR_LIB_SSL, SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
0f113f3e MC |
3594 | } |
3595 | ||
222561fe | 3596 | X509_free(x509); |
25aaa98a | 3597 | EVP_PKEY_free(pkey); |
0f113f3e MC |
3598 | if (i && !ssl3_check_client_certificate(s)) |
3599 | i = 0; | |
3600 | if (i == 0) { | |
3601 | if (s->version == SSL3_VERSION) { | |
555cbb32 | 3602 | s->s3.tmp.cert_req = 0; |
0f113f3e | 3603 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); |
b9908bf9 | 3604 | return WORK_FINISHED_CONTINUE; |
0f113f3e | 3605 | } else { |
555cbb32 | 3606 | s->s3.tmp.cert_req = 2; |
b67cb09f | 3607 | s->ext.compress_certificate_from_peer[0] = TLSEXT_comp_cert_none; |
124037fd | 3608 | if (!ssl3_digest_cached_records(s, 0)) { |
f63a17d6 | 3609 | /* SSLfatal() already called */ |
eb5fd03b | 3610 | return WORK_ERROR; |
dab18ab5 | 3611 | } |
0f113f3e MC |
3612 | } |
3613 | } | |
3614 | ||
b67cb09f TS |
3615 | if (!SSL_CONNECTION_IS_TLS13(s) |
3616 | || (s->options & SSL_OP_NO_TX_CERTIFICATE_COMPRESSION) != 0) | |
3617 | s->ext.compress_certificate_from_peer[0] = TLSEXT_comp_cert_none; | |
3618 | ||
9d75dce3 TS |
3619 | if (s->post_handshake_auth == SSL_PHA_REQUESTED) |
3620 | return WORK_FINISHED_STOP; | |
b9908bf9 | 3621 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3622 | } |
3623 | ||
b9908bf9 | 3624 | /* Shouldn't ever get here */ |
c48ffbcc | 3625 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b9908bf9 MC |
3626 | return WORK_ERROR; |
3627 | } | |
3628 | ||
67ec6d2b MC |
3629 | CON_FUNC_RETURN tls_construct_client_certificate(SSL_CONNECTION *s, |
3630 | WPACKET *pkt) | |
b9908bf9 | 3631 | { |
38b051a1 TM |
3632 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
3633 | ||
3634 | if (SSL_CONNECTION_IS_TLS13(s)) { | |
9d75dce3 TS |
3635 | if (s->pha_context == NULL) { |
3636 | /* no context available, add 0-length context */ | |
3637 | if (!WPACKET_put_bytes_u8(pkt, 0)) { | |
c48ffbcc | 3638 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 3639 | return CON_FUNC_ERROR; |
9d75dce3 TS |
3640 | } |
3641 | } else if (!WPACKET_sub_memcpy_u8(pkt, s->pha_context, s->pha_context_len)) { | |
c48ffbcc | 3642 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 3643 | return CON_FUNC_ERROR; |
9d75dce3 | 3644 | } |
f63a17d6 MC |
3645 | } |
3646 | if (!ssl3_output_cert_chain(s, pkt, | |
555cbb32 | 3647 | (s->s3.tmp.cert_req == 2) ? NULL |
72620ac7 | 3648 | : s->cert->key, 0)) { |
f63a17d6 | 3649 | /* SSLfatal() already called */ |
67ec6d2b | 3650 | return CON_FUNC_ERROR; |
f7e393be MC |
3651 | } |
3652 | ||
38b051a1 | 3653 | if (SSL_CONNECTION_IS_TLS13(s) |
f7e393be | 3654 | && SSL_IS_FIRST_HANDSHAKE(s) |
38b051a1 | 3655 | && (!ssl->method->ssl3_enc->change_cipher_state(s, |
f7e393be | 3656 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE))) { |
c31ad0bb | 3657 | /* |
a2c2e000 | 3658 | * This is a fatal error, which leaves enc_write_ctx in an inconsistent |
f63a17d6 | 3659 | * state and thus ssl3_send_alert may crash. |
c31ad0bb | 3660 | */ |
c48ffbcc | 3661 | SSLfatal(s, SSL_AD_NO_ALERT, SSL_R_CANNOT_CHANGE_CIPHER); |
67ec6d2b | 3662 | return CON_FUNC_ERROR; |
0f113f3e | 3663 | } |
b9908bf9 | 3664 | |
67ec6d2b | 3665 | return CON_FUNC_SUCCESS; |
0f113f3e MC |
3666 | } |
3667 | ||
b67cb09f TS |
3668 | #ifndef OPENSSL_NO_COMP_ALG |
3669 | CON_FUNC_RETURN tls_construct_client_compressed_certificate(SSL_CONNECTION *sc, | |
3670 | WPACKET *pkt) | |
3671 | { | |
3672 | SSL *ssl = SSL_CONNECTION_GET_SSL(sc); | |
3673 | WPACKET tmppkt; | |
3674 | BUF_MEM *buf = NULL; | |
3675 | size_t length; | |
3676 | size_t max_length; | |
3677 | COMP_METHOD *method; | |
3678 | COMP_CTX *comp = NULL; | |
3679 | int comp_len; | |
3680 | int ret = 0; | |
3681 | int alg = sc->ext.compress_certificate_from_peer[0]; | |
3682 | ||
3683 | /* Note that sc->s3.tmp.cert_req == 2 is checked in write transition */ | |
3684 | ||
3685 | if ((buf = BUF_MEM_new()) == NULL || !WPACKET_init(&tmppkt, buf)) | |
3686 | goto err; | |
3687 | ||
3688 | /* Use the |tmppkt| for the to-be-compressed data */ | |
3689 | if (sc->pha_context == NULL) { | |
3690 | /* no context available, add 0-length context */ | |
3691 | if (!WPACKET_put_bytes_u8(&tmppkt, 0)) | |
3692 | goto err; | |
3693 | } else if (!WPACKET_sub_memcpy_u8(&tmppkt, sc->pha_context, sc->pha_context_len)) | |
3694 | goto err; | |
3695 | ||
72620ac7 | 3696 | if (!ssl3_output_cert_chain(sc, &tmppkt, sc->cert->key, 0)) { |
b67cb09f TS |
3697 | /* SSLfatal() already called */ |
3698 | goto out; | |
3699 | } | |
3700 | ||
3701 | /* continue with the real |pkt| */ | |
3702 | if (!WPACKET_put_bytes_u16(pkt, alg) | |
3703 | || !WPACKET_get_total_written(&tmppkt, &length) | |
3704 | || !WPACKET_put_bytes_u24(pkt, length)) | |
3705 | goto err; | |
3706 | ||
3707 | switch (alg) { | |
3708 | case TLSEXT_comp_cert_zlib: | |
3840271e | 3709 | method = COMP_zlib_oneshot(); |
b67cb09f TS |
3710 | break; |
3711 | case TLSEXT_comp_cert_brotli: | |
3712 | method = COMP_brotli_oneshot(); | |
3713 | break; | |
3714 | case TLSEXT_comp_cert_zstd: | |
3715 | method = COMP_zstd_oneshot(); | |
3716 | break; | |
3717 | default: | |
3718 | goto err; | |
3719 | } | |
3720 | max_length = ossl_calculate_comp_expansion(alg, length); | |
3721 | ||
7e3cacac TS |
3722 | if ((comp = COMP_CTX_new(method)) == NULL |
3723 | || !WPACKET_start_sub_packet_u24(pkt) | |
3724 | || !WPACKET_reserve_bytes(pkt, max_length, NULL)) | |
b67cb09f TS |
3725 | goto err; |
3726 | ||
3727 | comp_len = COMP_compress_block(comp, WPACKET_get_curr(pkt), max_length, | |
3728 | (unsigned char *)buf->data, length); | |
3729 | if (comp_len <= 0) | |
3730 | goto err; | |
3731 | ||
3732 | if (!WPACKET_allocate_bytes(pkt, comp_len, NULL) | |
3733 | || !WPACKET_close(pkt)) | |
3734 | goto err; | |
3735 | ||
3736 | if (SSL_IS_FIRST_HANDSHAKE(sc) | |
3737 | && (!ssl->method->ssl3_enc->change_cipher_state(sc, | |
3738 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE))) { | |
3739 | /* | |
3740 | * This is a fatal error, which leaves sc->enc_write_ctx in an | |
3741 | * inconsistent state and thus ssl3_send_alert may crash. | |
3742 | */ | |
3743 | SSLfatal(sc, SSL_AD_NO_ALERT, SSL_R_CANNOT_CHANGE_CIPHER); | |
3744 | goto out; | |
3745 | } | |
3746 | ret = 1; | |
3747 | goto out; | |
3748 | ||
3749 | err: | |
3750 | SSLfatal(sc, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
3751 | out: | |
d06d5d6b TS |
3752 | if (buf != NULL) { |
3753 | /* If |buf| is NULL, then |tmppkt| could not have been initialized */ | |
3754 | WPACKET_cleanup(&tmppkt); | |
3755 | } | |
b67cb09f TS |
3756 | BUF_MEM_free(buf); |
3757 | COMP_CTX_free(comp); | |
3758 | return ret; | |
3759 | } | |
3760 | #endif | |
3761 | ||
38b051a1 | 3762 | int ssl3_check_cert_and_algorithm(SSL_CONNECTION *s) |
0f113f3e | 3763 | { |
dd24857b DSH |
3764 | const SSL_CERT_LOOKUP *clu; |
3765 | size_t idx; | |
0f113f3e | 3766 | long alg_k, alg_a; |
d02b48c6 | 3767 | |
555cbb32 TS |
3768 | alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
3769 | alg_a = s->s3.tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 3770 | |
0f113f3e | 3771 | /* we don't have a certificate */ |
dd24857b DSH |
3772 | if (!(alg_a & SSL_aCERT)) |
3773 | return 1; | |
d02b48c6 | 3774 | |
0f113f3e | 3775 | /* This is the passed certificate */ |
ee58915c MB |
3776 | clu = ssl_cert_lookup_by_pkey(X509_get0_pubkey(s->session->peer), &idx, |
3777 | SSL_CONNECTION_GET_CTX(s)); | |
d02b48c6 | 3778 | |
dd24857b DSH |
3779 | /* Check certificate is recognised and suitable for cipher */ |
3780 | if (clu == NULL || (alg_a & clu->amask) == 0) { | |
c48ffbcc | 3781 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_MISSING_SIGNING_CERT); |
f63a17d6 | 3782 | return 0; |
0f113f3e | 3783 | } |
0f113f3e | 3784 | |
dd24857b DSH |
3785 | if (clu->amask & SSL_aECDSA) { |
3786 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s)) | |
3787 | return 1; | |
c48ffbcc | 3788 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_BAD_ECC_CERT); |
f63a17d6 | 3789 | return 0; |
0f113f3e | 3790 | } |
462f4f4b | 3791 | |
dd24857b | 3792 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK) && idx != SSL_PKEY_RSA) { |
f63a17d6 | 3793 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
f63a17d6 MC |
3794 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); |
3795 | return 0; | |
0f113f3e | 3796 | } |
5b64ce89 | 3797 | |
555cbb32 | 3798 | if ((alg_k & SSL_kDHE) && (s->s3.peer_tmp == NULL)) { |
c48ffbcc | 3799 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f63a17d6 | 3800 | return 0; |
0f113f3e | 3801 | } |
d02b48c6 | 3802 | |
dd24857b | 3803 | return 1; |
0f113f3e MC |
3804 | } |
3805 | ||
e481f9b9 | 3806 | #ifndef OPENSSL_NO_NEXTPROTONEG |
67ec6d2b | 3807 | CON_FUNC_RETURN tls_construct_next_proto(SSL_CONNECTION *s, WPACKET *pkt) |
b9908bf9 | 3808 | { |
15e6be6c MC |
3809 | size_t len, padding_len; |
3810 | unsigned char *padding = NULL; | |
15e6be6c | 3811 | |
aff8c126 | 3812 | len = s->ext.npn_len; |
b9908bf9 | 3813 | padding_len = 32 - ((len + 2) % 32); |
15e6be6c | 3814 | |
aff8c126 | 3815 | if (!WPACKET_sub_memcpy_u8(pkt, s->ext.npn, len) |
7cea05dc | 3816 | || !WPACKET_sub_allocate_bytes_u8(pkt, padding_len, &padding)) { |
c48ffbcc | 3817 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 3818 | return CON_FUNC_ERROR; |
15e6be6c MC |
3819 | } |
3820 | ||
3821 | memset(padding, 0, padding_len); | |
3822 | ||
67ec6d2b | 3823 | return CON_FUNC_SUCCESS; |
b9908bf9 | 3824 | } |
6434abbf | 3825 | #endif |
368888bc | 3826 | |
38b051a1 | 3827 | MSG_PROCESS_RETURN tls_process_hello_req(SSL_CONNECTION *s, PACKET *pkt) |
c7f47786 | 3828 | { |
38b051a1 TM |
3829 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
3830 | ||
c7f47786 MC |
3831 | if (PACKET_remaining(pkt) > 0) { |
3832 | /* should contain no data */ | |
c48ffbcc | 3833 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
c7f47786 MC |
3834 | return MSG_PROCESS_ERROR; |
3835 | } | |
3836 | ||
db0f35dd TS |
3837 | if ((s->options & SSL_OP_NO_RENEGOTIATION)) { |
3838 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_RENEGOTIATION); | |
3839 | return MSG_PROCESS_FINISHED_READING; | |
3840 | } | |
3841 | ||
c7f47786 | 3842 | /* |
1f04f23e MC |
3843 | * This is a historical discrepancy (not in the RFC) maintained for |
3844 | * compatibility reasons. If a TLS client receives a HelloRequest it will | |
3845 | * attempt an abbreviated handshake. However if a DTLS client receives a | |
3846 | * HelloRequest it will do a full handshake. Either behaviour is reasonable | |
3847 | * but doing one for TLS and another for DTLS is odd. | |
c7f47786 | 3848 | */ |
38b051a1 TM |
3849 | if (SSL_CONNECTION_IS_DTLS(s)) |
3850 | SSL_renegotiate(ssl); | |
c7f47786 | 3851 | else |
38b051a1 | 3852 | SSL_renegotiate_abbreviated(ssl); |
c7f47786 MC |
3853 | |
3854 | return MSG_PROCESS_FINISHED_READING; | |
3855 | } | |
3856 | ||
38b051a1 TM |
3857 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL_CONNECTION *s, |
3858 | PACKET *pkt) | |
e46f2334 | 3859 | { |
e46f2334 | 3860 | PACKET extensions; |
3434f40b | 3861 | RAW_EXTENSION *rawexts = NULL; |
e46f2334 | 3862 | |
26b9172a MC |
3863 | if (!PACKET_as_length_prefixed_2(pkt, &extensions) |
3864 | || PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 3865 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
e46f2334 MC |
3866 | goto err; |
3867 | } | |
3868 | ||
fe874d27 MC |
3869 | if (!tls_collect_extensions(s, &extensions, |
3870 | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, &rawexts, | |
f63a17d6 | 3871 | NULL, 1) |
fe874d27 | 3872 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, |
f63a17d6 MC |
3873 | rawexts, NULL, 0, 1)) { |
3874 | /* SSLfatal() already called */ | |
3434f40b | 3875 | goto err; |
f63a17d6 | 3876 | } |
3434f40b | 3877 | |
1b0286a3 | 3878 | OPENSSL_free(rawexts); |
e46f2334 MC |
3879 | return MSG_PROCESS_CONTINUE_READING; |
3880 | ||
3881 | err: | |
1b0286a3 | 3882 | OPENSSL_free(rawexts); |
e46f2334 MC |
3883 | return MSG_PROCESS_ERROR; |
3884 | } | |
3885 | ||
38b051a1 | 3886 | int ssl_do_client_cert_cb(SSL_CONNECTION *s, X509 **px509, EVP_PKEY **ppkey) |
0f113f3e MC |
3887 | { |
3888 | int i = 0; | |
38b051a1 TM |
3889 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
3890 | ||
368888bc | 3891 | #ifndef OPENSSL_NO_ENGINE |
38b051a1 | 3892 | if (sctx->client_cert_engine) { |
301fcb28 | 3893 | i = tls_engine_load_ssl_client_cert(s, px509, ppkey); |
0f113f3e MC |
3894 | if (i != 0) |
3895 | return i; | |
3896 | } | |
3897 | #endif | |
38b051a1 TM |
3898 | if (sctx->client_cert_cb) |
3899 | i = sctx->client_cert_cb(SSL_CONNECTION_GET_SSL(s), px509, ppkey); | |
0f113f3e MC |
3900 | return i; |
3901 | } | |
d45ba43d | 3902 | |
38b051a1 TM |
3903 | int ssl_cipher_list_to_bytes(SSL_CONNECTION *s, STACK_OF(SSL_CIPHER) *sk, |
3904 | WPACKET *pkt) | |
d45ba43d | 3905 | { |
2c7b4dbc | 3906 | int i; |
aafec89c | 3907 | size_t totlen = 0, len, maxlen, maxverok = 0; |
d45ba43d | 3908 | int empty_reneg_info_scsv = !s->renegotiate; |
38b051a1 | 3909 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
1d0c08b4 | 3910 | |
d45ba43d | 3911 | /* Set disabled masks for this session */ |
1d0c08b4 | 3912 | if (!ssl_set_client_disabled(s)) { |
c48ffbcc | 3913 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_NO_PROTOCOLS_AVAILABLE); |
1d0c08b4 MC |
3914 | return 0; |
3915 | } | |
d45ba43d | 3916 | |
f63a17d6 | 3917 | if (sk == NULL) { |
c48ffbcc | 3918 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
26a7d938 | 3919 | return 0; |
f63a17d6 | 3920 | } |
d45ba43d | 3921 | |
2c7b4dbc MC |
3922 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
3923 | # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6 | |
3924 | # error Max cipher length too short | |
3925 | # endif | |
3926 | /* | |
3927 | * Some servers hang if client hello > 256 bytes as hack workaround | |
3928 | * chop number of supported ciphers to keep it well below this if we | |
3929 | * use TLS v1.2 | |
3930 | */ | |
38b051a1 | 3931 | if (TLS1_get_version(ssl) >= TLS1_2_VERSION) |
2c7b4dbc MC |
3932 | maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; |
3933 | else | |
3934 | #endif | |
3935 | /* Maximum length that can be stored in 2 bytes. Length must be even */ | |
3936 | maxlen = 0xfffe; | |
3937 | ||
3938 | if (empty_reneg_info_scsv) | |
3939 | maxlen -= 2; | |
3940 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) | |
3941 | maxlen -= 2; | |
3942 | ||
3943 | for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) { | |
3944 | const SSL_CIPHER *c; | |
3945 | ||
d45ba43d MC |
3946 | c = sk_SSL_CIPHER_value(sk, i); |
3947 | /* Skip disabled ciphers */ | |
8af91fd9 | 3948 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0)) |
d45ba43d | 3949 | continue; |
2c7b4dbc | 3950 | |
38b051a1 | 3951 | if (!ssl->method->put_cipher_by_char(c, pkt, &len)) { |
c48ffbcc | 3952 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
2c7b4dbc MC |
3953 | return 0; |
3954 | } | |
3955 | ||
aafec89c MC |
3956 | /* Sanity check that the maximum version we offer has ciphers enabled */ |
3957 | if (!maxverok) { | |
38b051a1 | 3958 | if (SSL_CONNECTION_IS_DTLS(s)) { |
555cbb32 TS |
3959 | if (DTLS_VERSION_GE(c->max_dtls, s->s3.tmp.max_ver) |
3960 | && DTLS_VERSION_LE(c->min_dtls, s->s3.tmp.max_ver)) | |
aafec89c MC |
3961 | maxverok = 1; |
3962 | } else { | |
555cbb32 TS |
3963 | if (c->max_tls >= s->s3.tmp.max_ver |
3964 | && c->min_tls <= s->s3.tmp.max_ver) | |
aafec89c MC |
3965 | maxverok = 1; |
3966 | } | |
3967 | } | |
3968 | ||
2c7b4dbc | 3969 | totlen += len; |
d45ba43d | 3970 | } |
2c7b4dbc | 3971 | |
aafec89c | 3972 | if (totlen == 0 || !maxverok) { |
c48ffbcc RL |
3973 | const char *maxvertext = |
3974 | !maxverok | |
3975 | ? "No ciphers enabled for max supported SSL/TLS version" | |
3976 | : NULL; | |
aafec89c | 3977 | |
c48ffbcc RL |
3978 | SSLfatal_data(s, SSL_AD_INTERNAL_ERROR, SSL_R_NO_CIPHERS_AVAILABLE, |
3979 | maxvertext); | |
2c7b4dbc MC |
3980 | return 0; |
3981 | } | |
3982 | ||
3983 | if (totlen != 0) { | |
d45ba43d MC |
3984 | if (empty_reneg_info_scsv) { |
3985 | static SSL_CIPHER scsv = { | |
bbb4ceb8 | 3986 | 0, NULL, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 |
d45ba43d | 3987 | }; |
38b051a1 | 3988 | if (!ssl->method->put_cipher_by_char(&scsv, pkt, &len)) { |
c48ffbcc | 3989 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
2c7b4dbc MC |
3990 | return 0; |
3991 | } | |
d45ba43d MC |
3992 | } |
3993 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
3994 | static SSL_CIPHER scsv = { | |
bbb4ceb8 | 3995 | 0, NULL, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 |
d45ba43d | 3996 | }; |
38b051a1 | 3997 | if (!ssl->method->put_cipher_by_char(&scsv, pkt, &len)) { |
c48ffbcc | 3998 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
2c7b4dbc MC |
3999 | return 0; |
4000 | } | |
d45ba43d MC |
4001 | } |
4002 | } | |
4003 | ||
2c7b4dbc | 4004 | return 1; |
d45ba43d | 4005 | } |
ef6c191b | 4006 | |
67ec6d2b | 4007 | CON_FUNC_RETURN tls_construct_end_of_early_data(SSL_CONNECTION *s, WPACKET *pkt) |
ef6c191b MC |
4008 | { |
4009 | if (s->early_data_state != SSL_EARLY_DATA_WRITE_RETRY | |
4010 | && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING) { | |
c48ffbcc | 4011 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
67ec6d2b | 4012 | return CON_FUNC_ERROR; |
ef6c191b MC |
4013 | } |
4014 | ||
4015 | s->early_data_state = SSL_EARLY_DATA_FINISHED_WRITING; | |
67ec6d2b | 4016 | return CON_FUNC_SUCCESS; |
ef6c191b | 4017 | } |