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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, | |
723 | NULL, 0, NULL, 0, NULL, 0, NULL, 0, | |
724 | NID_undef, NULL, NULL)) { | |
725 | /* SSLfatal already called */ | |
726 | return WORK_ERROR; | |
727 | } | |
61ae935a MC |
728 | } |
729 | break; | |
730 | ||
61ae935a | 731 | case TLS_ST_CW_CHANGE: |
38b051a1 | 732 | if (SSL_CONNECTION_IS_DTLS(s)) { |
61ae935a MC |
733 | if (s->hit) { |
734 | /* | |
735 | * We're into the last flight so we don't retransmit these | |
736 | * messages unless we need to. | |
737 | */ | |
738 | st->use_timer = 0; | |
739 | } | |
740 | #ifndef OPENSSL_NO_SCTP | |
38b051a1 | 741 | if (BIO_dgram_is_sctp(SSL_get_wbio(SSL_CONNECTION_GET_SSL(s)))) { |
a2c2e000 | 742 | /* Calls SSLfatal() as required */ |
61ae935a | 743 | return dtls_wait_for_dry(s); |
a2c2e000 | 744 | } |
61ae935a MC |
745 | #endif |
746 | } | |
f3b3d7f0 | 747 | break; |
61ae935a | 748 | |
d7f8783f | 749 | case TLS_ST_PENDING_EARLY_DATA_END: |
ef6c191b MC |
750 | /* |
751 | * If we've been called by SSL_do_handshake()/SSL_write(), or we did not | |
752 | * attempt to write early data before calling SSL_read() then we press | |
753 | * on with the handshake. Otherwise we pause here. | |
754 | */ | |
755 | if (s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING | |
756 | || s->early_data_state == SSL_EARLY_DATA_NONE) | |
757 | return WORK_FINISHED_CONTINUE; | |
758 | /* Fall through */ | |
759 | ||
760 | case TLS_ST_EARLY_DATA: | |
2a8db717 MC |
761 | return tls_finish_handshake(s, wst, 0, 1); |
762 | ||
61ae935a | 763 | case TLS_ST_OK: |
a2c2e000 | 764 | /* Calls SSLfatal() as required */ |
2a8db717 | 765 | return tls_finish_handshake(s, wst, 1, 1); |
61ae935a MC |
766 | } |
767 | ||
768 | return WORK_FINISHED_CONTINUE; | |
769 | } | |
770 | ||
771 | /* | |
772 | * Perform any work that needs to be done after sending a message from the | |
773 | * client to the server. | |
774 | */ | |
38b051a1 | 775 | WORK_STATE ossl_statem_client_post_work(SSL_CONNECTION *s, WORK_STATE wst) |
61ae935a | 776 | { |
d6f1a6e9 | 777 | OSSL_STATEM *st = &s->statem; |
38b051a1 | 778 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
61ae935a MC |
779 | |
780 | s->init_num = 0; | |
781 | ||
a230b26e | 782 | switch (st->hand_state) { |
f3b3d7f0 RS |
783 | default: |
784 | /* No post work to be done */ | |
785 | break; | |
786 | ||
61ae935a | 787 | case TLS_ST_CW_CLNT_HELLO: |
6cb42265 | 788 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING |
5cc807da | 789 | && s->max_early_data > 0) { |
6cb42265 MC |
790 | /* |
791 | * We haven't selected TLSv1.3 yet so we don't call the change | |
792 | * cipher state function associated with the SSL_METHOD. Instead | |
793 | * we call tls13_change_cipher_state() directly. | |
794 | */ | |
5cc807da | 795 | if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) == 0) { |
5cc807da MC |
796 | if (!tls13_change_cipher_state(s, |
797 | SSL3_CC_EARLY | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { | |
798 | /* SSLfatal() already called */ | |
799 | return WORK_ERROR; | |
800 | } | |
a2c2e000 | 801 | } |
5cc807da MC |
802 | /* else we're in compat mode so we delay flushing until after CCS */ |
803 | } else if (!statem_flush(s)) { | |
804 | return WORK_MORE_A; | |
805 | } | |
806 | ||
38b051a1 | 807 | if (SSL_CONNECTION_IS_DTLS(s)) { |
5cc807da MC |
808 | /* Treat the next message as the first packet */ |
809 | s->first_packet = 1; | |
6cb42265 | 810 | } |
61ae935a MC |
811 | break; |
812 | ||
813 | case TLS_ST_CW_KEY_EXCH: | |
a2c2e000 MC |
814 | if (tls_client_key_exchange_post_work(s) == 0) { |
815 | /* SSLfatal() already called */ | |
61ae935a | 816 | return WORK_ERROR; |
a2c2e000 | 817 | } |
61ae935a MC |
818 | break; |
819 | ||
820 | case TLS_ST_CW_CHANGE: | |
38b051a1 TM |
821 | if (SSL_CONNECTION_IS_TLS13(s) |
822 | || s->hello_retry_request == SSL_HRR_PENDING) | |
4d02f870 | 823 | break; |
066904cc MC |
824 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING |
825 | && s->max_early_data > 0) { | |
826 | /* | |
827 | * We haven't selected TLSv1.3 yet so we don't call the change | |
828 | * cipher state function associated with the SSL_METHOD. Instead | |
829 | * we call tls13_change_cipher_state() directly. | |
830 | */ | |
831 | if (!tls13_change_cipher_state(s, | |
832 | SSL3_CC_EARLY | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
833 | return WORK_ERROR; | |
834 | break; | |
835 | } | |
555cbb32 | 836 | s->session->cipher = s->s3.tmp.new_cipher; |
61ae935a MC |
837 | #ifdef OPENSSL_NO_COMP |
838 | s->session->compress_meth = 0; | |
839 | #else | |
555cbb32 | 840 | if (s->s3.tmp.new_compression == NULL) |
61ae935a MC |
841 | s->session->compress_meth = 0; |
842 | else | |
555cbb32 | 843 | s->session->compress_meth = s->s3.tmp.new_compression->id; |
61ae935a | 844 | #endif |
38b051a1 | 845 | if (!ssl->method->ssl3_enc->setup_key_block(s)) { |
a2c2e000 | 846 | /* SSLfatal() already called */ |
61ae935a | 847 | return WORK_ERROR; |
a2c2e000 | 848 | } |
61ae935a | 849 | |
38b051a1 | 850 | if (!ssl->method->ssl3_enc->change_cipher_state(s, |
a2c2e000 MC |
851 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { |
852 | /* SSLfatal() already called */ | |
61ae935a | 853 | return WORK_ERROR; |
a2c2e000 | 854 | } |
61ae935a | 855 | |
38b051a1 | 856 | if (SSL_CONNECTION_IS_DTLS(s)) { |
61ae935a MC |
857 | #ifndef OPENSSL_NO_SCTP |
858 | if (s->hit) { | |
859 | /* | |
860 | * Change to new shared key of SCTP-Auth, will be ignored if | |
861 | * no SCTP used. | |
862 | */ | |
38b051a1 | 863 | BIO_ctrl(SSL_get_wbio(ssl), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, |
61ae935a MC |
864 | 0, NULL); |
865 | } | |
866 | #endif | |
867 | ||
868 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); | |
869 | } | |
870 | break; | |
871 | ||
872 | case TLS_ST_CW_FINISHED: | |
873 | #ifndef OPENSSL_NO_SCTP | |
38b051a1 | 874 | if (wst == WORK_MORE_A && SSL_CONNECTION_IS_DTLS(s) && s->hit == 0) { |
61ae935a MC |
875 | /* |
876 | * Change to new shared key of SCTP-Auth, will be ignored if | |
877 | * no SCTP used. | |
878 | */ | |
38b051a1 | 879 | BIO_ctrl(SSL_get_wbio(ssl), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, |
61ae935a MC |
880 | 0, NULL); |
881 | } | |
882 | #endif | |
883 | if (statem_flush(s) != 1) | |
884 | return WORK_MORE_B; | |
92760c21 | 885 | |
38b051a1 | 886 | if (SSL_CONNECTION_IS_TLS13(s)) { |
9d75dce3 | 887 | if (!tls13_save_handshake_digest_for_pha(s)) { |
a2c2e000 MC |
888 | /* SSLfatal() already called */ |
889 | return WORK_ERROR; | |
890 | } | |
9d75dce3 | 891 | if (s->post_handshake_auth != SSL_PHA_REQUESTED) { |
38b051a1 | 892 | if (!ssl->method->ssl3_enc->change_cipher_state(s, |
9d75dce3 TS |
893 | SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { |
894 | /* SSLfatal() already called */ | |
895 | return WORK_ERROR; | |
896 | } | |
897 | } | |
92760c21 | 898 | } |
61ae935a | 899 | break; |
9412b3ad MC |
900 | |
901 | case TLS_ST_CW_KEY_UPDATE: | |
902 | if (statem_flush(s) != 1) | |
903 | return WORK_MORE_A; | |
a2c2e000 MC |
904 | if (!tls13_update_key(s, 1)) { |
905 | /* SSLfatal() already called */ | |
57389a32 | 906 | return WORK_ERROR; |
a2c2e000 | 907 | } |
9412b3ad | 908 | break; |
61ae935a MC |
909 | } |
910 | ||
911 | return WORK_FINISHED_CONTINUE; | |
912 | } | |
913 | ||
914 | /* | |
6392fb8e MC |
915 | * Get the message construction function and message type for sending from the |
916 | * client | |
61ae935a MC |
917 | * |
918 | * Valid return values are: | |
919 | * 1: Success | |
920 | * 0: Error | |
921 | */ | |
38b051a1 | 922 | int ossl_statem_client_construct_message(SSL_CONNECTION *s, |
a15c953f | 923 | confunc_f *confunc, int *mt) |
61ae935a | 924 | { |
d6f1a6e9 | 925 | OSSL_STATEM *st = &s->statem; |
61ae935a | 926 | |
4a01c59f MC |
927 | switch (st->hand_state) { |
928 | default: | |
929 | /* Shouldn't happen */ | |
c48ffbcc | 930 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_HANDSHAKE_STATE); |
4a01c59f MC |
931 | return 0; |
932 | ||
933 | case TLS_ST_CW_CHANGE: | |
38b051a1 | 934 | if (SSL_CONNECTION_IS_DTLS(s)) |
6392fb8e | 935 | *confunc = dtls_construct_change_cipher_spec; |
4a01c59f | 936 | else |
6392fb8e MC |
937 | *confunc = tls_construct_change_cipher_spec; |
938 | *mt = SSL3_MT_CHANGE_CIPHER_SPEC; | |
4a01c59f MC |
939 | break; |
940 | ||
941 | case TLS_ST_CW_CLNT_HELLO: | |
6392fb8e MC |
942 | *confunc = tls_construct_client_hello; |
943 | *mt = SSL3_MT_CLIENT_HELLO; | |
4a01c59f MC |
944 | break; |
945 | ||
ef6c191b MC |
946 | case TLS_ST_CW_END_OF_EARLY_DATA: |
947 | *confunc = tls_construct_end_of_early_data; | |
948 | *mt = SSL3_MT_END_OF_EARLY_DATA; | |
949 | break; | |
950 | ||
951 | case TLS_ST_PENDING_EARLY_DATA_END: | |
952 | *confunc = NULL; | |
953 | *mt = SSL3_MT_DUMMY; | |
954 | break; | |
955 | ||
4a01c59f | 956 | case TLS_ST_CW_CERT: |
6392fb8e MC |
957 | *confunc = tls_construct_client_certificate; |
958 | *mt = SSL3_MT_CERTIFICATE; | |
4a01c59f MC |
959 | break; |
960 | ||
b67cb09f TS |
961 | #ifndef OPENSSL_NO_COMP_ALG |
962 | case TLS_ST_CW_COMP_CERT: | |
963 | *confunc = tls_construct_client_compressed_certificate; | |
964 | *mt = SSL3_MT_COMPRESSED_CERTIFICATE; | |
965 | break; | |
966 | #endif | |
967 | ||
4a01c59f | 968 | case TLS_ST_CW_KEY_EXCH: |
6392fb8e MC |
969 | *confunc = tls_construct_client_key_exchange; |
970 | *mt = SSL3_MT_CLIENT_KEY_EXCHANGE; | |
4a01c59f MC |
971 | break; |
972 | ||
973 | case TLS_ST_CW_CERT_VRFY: | |
d8bc1399 | 974 | *confunc = tls_construct_cert_verify; |
6392fb8e | 975 | *mt = SSL3_MT_CERTIFICATE_VERIFY; |
4a01c59f | 976 | break; |
61ae935a MC |
977 | |
978 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
4a01c59f | 979 | case TLS_ST_CW_NEXT_PROTO: |
6392fb8e MC |
980 | *confunc = tls_construct_next_proto; |
981 | *mt = SSL3_MT_NEXT_PROTO; | |
4a01c59f | 982 | break; |
61ae935a | 983 | #endif |
4a01c59f | 984 | case TLS_ST_CW_FINISHED: |
6392fb8e MC |
985 | *confunc = tls_construct_finished; |
986 | *mt = SSL3_MT_FINISHED; | |
4a01c59f | 987 | break; |
9412b3ad MC |
988 | |
989 | case TLS_ST_CW_KEY_UPDATE: | |
990 | *confunc = tls_construct_key_update; | |
991 | *mt = SSL3_MT_KEY_UPDATE; | |
992 | break; | |
4a01c59f | 993 | } |
5923ad4b | 994 | |
5923ad4b | 995 | return 1; |
61ae935a MC |
996 | } |
997 | ||
998 | /* | |
999 | * Returns the maximum allowed length for the current message that we are | |
1000 | * reading. Excludes the message header. | |
1001 | */ | |
38b051a1 | 1002 | size_t ossl_statem_client_max_message_size(SSL_CONNECTION *s) |
61ae935a | 1003 | { |
d6f1a6e9 | 1004 | OSSL_STATEM *st = &s->statem; |
61ae935a | 1005 | |
a230b26e | 1006 | switch (st->hand_state) { |
f3b3d7f0 RS |
1007 | default: |
1008 | /* Shouldn't happen */ | |
1009 | return 0; | |
1010 | ||
a230b26e EK |
1011 | case TLS_ST_CR_SRVR_HELLO: |
1012 | return SERVER_HELLO_MAX_LENGTH; | |
61ae935a | 1013 | |
a230b26e EK |
1014 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
1015 | return HELLO_VERIFY_REQUEST_MAX_LENGTH; | |
61ae935a | 1016 | |
b67cb09f | 1017 | case TLS_ST_CR_COMP_CERT: |
a230b26e EK |
1018 | case TLS_ST_CR_CERT: |
1019 | return s->max_cert_list; | |
61ae935a | 1020 | |
2c5dfdc3 MC |
1021 | case TLS_ST_CR_CERT_VRFY: |
1022 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
1023 | ||
a230b26e EK |
1024 | case TLS_ST_CR_CERT_STATUS: |
1025 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 1026 | |
a230b26e EK |
1027 | case TLS_ST_CR_KEY_EXCH: |
1028 | return SERVER_KEY_EXCH_MAX_LENGTH; | |
61ae935a | 1029 | |
a230b26e EK |
1030 | case TLS_ST_CR_CERT_REQ: |
1031 | /* | |
1032 | * Set to s->max_cert_list for compatibility with previous releases. In | |
1033 | * practice these messages can get quite long if servers are configured | |
1034 | * to provide a long list of acceptable CAs | |
1035 | */ | |
1036 | return s->max_cert_list; | |
61ae935a | 1037 | |
a230b26e EK |
1038 | case TLS_ST_CR_SRVR_DONE: |
1039 | return SERVER_HELLO_DONE_MAX_LENGTH; | |
61ae935a | 1040 | |
a230b26e EK |
1041 | case TLS_ST_CR_CHANGE: |
1042 | if (s->version == DTLS1_BAD_VER) | |
1043 | return 3; | |
1044 | return CCS_MAX_LENGTH; | |
61ae935a | 1045 | |
a230b26e | 1046 | case TLS_ST_CR_SESSION_TICKET: |
38b051a1 TM |
1047 | return (SSL_CONNECTION_IS_TLS13(s)) ? SESSION_TICKET_MAX_LENGTH_TLS13 |
1048 | : SESSION_TICKET_MAX_LENGTH_TLS12; | |
61ae935a | 1049 | |
a230b26e EK |
1050 | case TLS_ST_CR_FINISHED: |
1051 | return FINISHED_MAX_LENGTH; | |
e46f2334 MC |
1052 | |
1053 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
1054 | return ENCRYPTED_EXTENSIONS_MAX_LENGTH; | |
e1c3de44 MC |
1055 | |
1056 | case TLS_ST_CR_KEY_UPDATE: | |
1057 | return KEY_UPDATE_MAX_LENGTH; | |
61ae935a | 1058 | } |
61ae935a MC |
1059 | } |
1060 | ||
1061 | /* | |
0c3eb279 | 1062 | * Process a message that the client has received from the server. |
61ae935a | 1063 | */ |
38b051a1 TM |
1064 | MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL_CONNECTION *s, |
1065 | PACKET *pkt) | |
61ae935a | 1066 | { |
d6f1a6e9 | 1067 | OSSL_STATEM *st = &s->statem; |
61ae935a | 1068 | |
a230b26e | 1069 | switch (st->hand_state) { |
f3b3d7f0 RS |
1070 | default: |
1071 | /* Shouldn't happen */ | |
c48ffbcc | 1072 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3b3d7f0 RS |
1073 | return MSG_PROCESS_ERROR; |
1074 | ||
a230b26e EK |
1075 | case TLS_ST_CR_SRVR_HELLO: |
1076 | return tls_process_server_hello(s, pkt); | |
61ae935a | 1077 | |
a230b26e EK |
1078 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
1079 | return dtls_process_hello_verify(s, pkt); | |
61ae935a | 1080 | |
a230b26e EK |
1081 | case TLS_ST_CR_CERT: |
1082 | return tls_process_server_certificate(s, pkt); | |
61ae935a | 1083 | |
b67cb09f TS |
1084 | #ifndef OPENSSL_NO_COMP_ALG |
1085 | case TLS_ST_CR_COMP_CERT: | |
1086 | return tls_process_server_compressed_certificate(s, pkt); | |
1087 | #endif | |
1088 | ||
2c5dfdc3 MC |
1089 | case TLS_ST_CR_CERT_VRFY: |
1090 | return tls_process_cert_verify(s, pkt); | |
1091 | ||
a230b26e EK |
1092 | case TLS_ST_CR_CERT_STATUS: |
1093 | return tls_process_cert_status(s, pkt); | |
61ae935a | 1094 | |
a230b26e EK |
1095 | case TLS_ST_CR_KEY_EXCH: |
1096 | return tls_process_key_exchange(s, pkt); | |
61ae935a | 1097 | |
a230b26e EK |
1098 | case TLS_ST_CR_CERT_REQ: |
1099 | return tls_process_certificate_request(s, pkt); | |
61ae935a | 1100 | |
a230b26e EK |
1101 | case TLS_ST_CR_SRVR_DONE: |
1102 | return tls_process_server_done(s, pkt); | |
61ae935a | 1103 | |
a230b26e EK |
1104 | case TLS_ST_CR_CHANGE: |
1105 | return tls_process_change_cipher_spec(s, pkt); | |
61ae935a | 1106 | |
a230b26e EK |
1107 | case TLS_ST_CR_SESSION_TICKET: |
1108 | return tls_process_new_session_ticket(s, pkt); | |
61ae935a | 1109 | |
a230b26e EK |
1110 | case TLS_ST_CR_FINISHED: |
1111 | return tls_process_finished(s, pkt); | |
e46f2334 | 1112 | |
c7f47786 MC |
1113 | case TLS_ST_CR_HELLO_REQ: |
1114 | return tls_process_hello_req(s, pkt); | |
1115 | ||
e46f2334 MC |
1116 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: |
1117 | return tls_process_encrypted_extensions(s, pkt); | |
e1c3de44 MC |
1118 | |
1119 | case TLS_ST_CR_KEY_UPDATE: | |
1120 | return tls_process_key_update(s, pkt); | |
61ae935a | 1121 | } |
61ae935a MC |
1122 | } |
1123 | ||
1124 | /* | |
1125 | * Perform any further processing required following the receipt of a message | |
1126 | * from the server | |
1127 | */ | |
38b051a1 TM |
1128 | WORK_STATE ossl_statem_client_post_process_message(SSL_CONNECTION *s, |
1129 | WORK_STATE wst) | |
61ae935a | 1130 | { |
d6f1a6e9 | 1131 | OSSL_STATEM *st = &s->statem; |
61ae935a | 1132 | |
a230b26e | 1133 | switch (st->hand_state) { |
f3b3d7f0 RS |
1134 | default: |
1135 | /* Shouldn't happen */ | |
c48ffbcc | 1136 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3b3d7f0 RS |
1137 | return WORK_ERROR; |
1138 | ||
0c3eb279 | 1139 | case TLS_ST_CR_CERT: |
b67cb09f | 1140 | case TLS_ST_CR_COMP_CERT: |
0c3eb279 DDO |
1141 | return tls_post_process_server_certificate(s, wst); |
1142 | ||
e4562014 | 1143 | case TLS_ST_CR_CERT_VRFY: |
05c4f1d5 MC |
1144 | case TLS_ST_CR_CERT_REQ: |
1145 | return tls_prepare_client_certificate(s, wst); | |
61ae935a | 1146 | } |
61ae935a MC |
1147 | } |
1148 | ||
67ec6d2b | 1149 | CON_FUNC_RETURN tls_construct_client_hello(SSL_CONNECTION *s, WPACKET *pkt) |
0f113f3e | 1150 | { |
2c7b4dbc | 1151 | unsigned char *p; |
ec60ccc1 MC |
1152 | size_t sess_id_len; |
1153 | int i, protverr; | |
09b6c2ef | 1154 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
1155 | SSL_COMP *comp; |
1156 | #endif | |
b9908bf9 | 1157 | SSL_SESSION *sess = s->session; |
a5816a5a | 1158 | unsigned char *session_id; |
38b051a1 | 1159 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
0f113f3e | 1160 | |
b9908bf9 | 1161 | /* Work out what SSL/TLS/DTLS version to use */ |
4fa52141 VD |
1162 | protverr = ssl_set_client_hello_version(s); |
1163 | if (protverr != 0) { | |
c48ffbcc | 1164 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, protverr); |
67ec6d2b | 1165 | return CON_FUNC_ERROR; |
4fa52141 | 1166 | } |
0f113f3e | 1167 | |
e586eac8 | 1168 | if (sess == NULL |
4fd12788 | 1169 | || !ssl_version_supported(s, sess->ssl_version, NULL) |
e586eac8 | 1170 | || !SSL_SESSION_is_resumable(sess)) { |
fc7129dc MC |
1171 | if (s->hello_retry_request == SSL_HRR_NONE |
1172 | && !ssl_get_new_session(s, 0)) { | |
f63a17d6 | 1173 | /* SSLfatal() already called */ |
67ec6d2b | 1174 | return CON_FUNC_ERROR; |
f63a17d6 | 1175 | } |
b9908bf9 MC |
1176 | } |
1177 | /* else use the pre-loaded session */ | |
0f113f3e | 1178 | |
555cbb32 | 1179 | p = s->s3.client_random; |
0f113f3e | 1180 | |
b9908bf9 MC |
1181 | /* |
1182 | * for DTLS if client_random is initialized, reuse it, we are | |
1183 | * required to use same upon reply to HelloVerify | |
1184 | */ | |
38b051a1 | 1185 | if (SSL_CONNECTION_IS_DTLS(s)) { |
b9908bf9 MC |
1186 | size_t idx; |
1187 | i = 1; | |
555cbb32 | 1188 | for (idx = 0; idx < sizeof(s->s3.client_random); idx++) { |
b9908bf9 MC |
1189 | if (p[idx]) { |
1190 | i = 0; | |
1191 | break; | |
0f113f3e | 1192 | } |
0f113f3e | 1193 | } |
751b26b1 | 1194 | } else { |
fc7129dc | 1195 | i = (s->hello_retry_request == SSL_HRR_NONE); |
751b26b1 | 1196 | } |
0f113f3e | 1197 | |
555cbb32 | 1198 | if (i && ssl_fill_hello_random(s, 0, p, sizeof(s->s3.client_random), |
f63a17d6 | 1199 | DOWNGRADE_NONE) <= 0) { |
c48ffbcc | 1200 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1201 | return CON_FUNC_ERROR; |
f63a17d6 | 1202 | } |
b9908bf9 | 1203 | |
b9908bf9 MC |
1204 | /*- |
1205 | * version indicates the negotiated version: for example from | |
1206 | * an SSLv2/v3 compatible client hello). The client_version | |
1207 | * field is the maximum version we permit and it is also | |
1208 | * used in RSA encrypted premaster secrets. Some servers can | |
1209 | * choke if we initially report a higher version then | |
1210 | * renegotiate to a lower one in the premaster secret. This | |
1211 | * didn't happen with TLS 1.0 as most servers supported it | |
1212 | * but it can with TLS 1.1 or later if the server only supports | |
1213 | * 1.0. | |
1214 | * | |
1215 | * Possible scenario with previous logic: | |
1216 | * 1. Client hello indicates TLS 1.2 | |
1217 | * 2. Server hello says TLS 1.0 | |
1218 | * 3. RSA encrypted premaster secret uses 1.2. | |
8483a003 | 1219 | * 4. Handshake proceeds using TLS 1.0. |
b9908bf9 MC |
1220 | * 5. Server sends hello request to renegotiate. |
1221 | * 6. Client hello indicates TLS v1.0 as we now | |
1222 | * know that is maximum server supports. | |
1223 | * 7. Server chokes on RSA encrypted premaster secret | |
1224 | * containing version 1.0. | |
1225 | * | |
1226 | * For interoperability it should be OK to always use the | |
1227 | * maximum version we support in client hello and then rely | |
1228 | * on the checking of version to ensure the servers isn't | |
1229 | * being inconsistent: for example initially negotiating with | |
1230 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
1231 | * client_version in client hello and not resetting it to | |
1232 | * the negotiated version. | |
cd998837 MC |
1233 | * |
1234 | * For TLS 1.3 we always set the ClientHello version to 1.2 and rely on the | |
16bce0e0 | 1235 | * supported_versions extension for the real supported versions. |
b9908bf9 | 1236 | */ |
7acb8b64 | 1237 | if (!WPACKET_put_bytes_u16(pkt, s->client_version) |
555cbb32 | 1238 | || !WPACKET_memcpy(pkt, s->s3.client_random, SSL3_RANDOM_SIZE)) { |
c48ffbcc | 1239 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1240 | return CON_FUNC_ERROR; |
2c7b4dbc | 1241 | } |
b9908bf9 MC |
1242 | |
1243 | /* Session ID */ | |
a5816a5a MC |
1244 | session_id = s->session->session_id; |
1245 | if (s->new_session || s->session->ssl_version == TLS1_3_VERSION) { | |
1246 | if (s->version == TLS1_3_VERSION | |
1247 | && (s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0) { | |
1248 | sess_id_len = sizeof(s->tmp_session_id); | |
1249 | s->tmp_session_id_len = sess_id_len; | |
1250 | session_id = s->tmp_session_id; | |
fc7129dc | 1251 | if (s->hello_retry_request == SSL_HRR_NONE |
38b051a1 | 1252 | && RAND_bytes_ex(sctx->libctx, s->tmp_session_id, |
0f8815aa | 1253 | sess_id_len, 0) <= 0) { |
c48ffbcc | 1254 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1255 | return CON_FUNC_ERROR; |
a5816a5a MC |
1256 | } |
1257 | } else { | |
1258 | sess_id_len = 0; | |
1259 | } | |
1260 | } else { | |
dee0cc10 | 1261 | assert(s->session->session_id_length <= sizeof(s->session->session_id)); |
ec60ccc1 | 1262 | sess_id_len = s->session->session_id_length; |
a5816a5a MC |
1263 | if (s->version == TLS1_3_VERSION) { |
1264 | s->tmp_session_id_len = sess_id_len; | |
1265 | memcpy(s->tmp_session_id, s->session->session_id, sess_id_len); | |
1266 | } | |
1267 | } | |
dee0cc10 | 1268 | if (!WPACKET_start_sub_packet_u8(pkt) |
a5816a5a | 1269 | || (sess_id_len != 0 && !WPACKET_memcpy(pkt, session_id, |
ec60ccc1 | 1270 | sess_id_len)) |
7cea05dc | 1271 | || !WPACKET_close(pkt)) { |
c48ffbcc | 1272 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1273 | return CON_FUNC_ERROR; |
b9908bf9 | 1274 | } |
0f113f3e | 1275 | |
b9908bf9 | 1276 | /* cookie stuff for DTLS */ |
38b051a1 | 1277 | if (SSL_CONNECTION_IS_DTLS(s)) { |
2c7b4dbc | 1278 | if (s->d1->cookie_len > sizeof(s->d1->cookie) |
7cea05dc | 1279 | || !WPACKET_sub_memcpy_u8(pkt, s->d1->cookie, |
b2b3024e | 1280 | s->d1->cookie_len)) { |
c48ffbcc | 1281 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1282 | return CON_FUNC_ERROR; |
0f113f3e | 1283 | } |
b9908bf9 MC |
1284 | } |
1285 | ||
1286 | /* Ciphers supported */ | |
7cea05dc | 1287 | if (!WPACKET_start_sub_packet_u16(pkt)) { |
c48ffbcc | 1288 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1289 | return CON_FUNC_ERROR; |
2c7b4dbc | 1290 | } |
635c8f77 | 1291 | |
38b051a1 TM |
1292 | if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(SSL_CONNECTION_GET_SSL(s)), |
1293 | pkt)) { | |
f63a17d6 | 1294 | /* SSLfatal() already called */ |
67ec6d2b | 1295 | return CON_FUNC_ERROR; |
f63a17d6 | 1296 | } |
7cea05dc | 1297 | if (!WPACKET_close(pkt)) { |
c48ffbcc | 1298 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1299 | return CON_FUNC_ERROR; |
b9908bf9 | 1300 | } |
0f113f3e | 1301 | |
b9908bf9 | 1302 | /* COMPRESSION */ |
7cea05dc | 1303 | if (!WPACKET_start_sub_packet_u8(pkt)) { |
c48ffbcc | 1304 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1305 | return CON_FUNC_ERROR; |
2c7b4dbc MC |
1306 | } |
1307 | #ifndef OPENSSL_NO_COMP | |
c19602b5 | 1308 | if (ssl_allow_compression(s) |
38b051a1 TM |
1309 | && sctx->comp_methods |
1310 | && (SSL_CONNECTION_IS_DTLS(s) | |
1311 | || s->s3.tmp.max_ver < TLS1_3_VERSION)) { | |
1312 | int compnum = sk_SSL_COMP_num(sctx->comp_methods); | |
2c7b4dbc | 1313 | for (i = 0; i < compnum; i++) { |
38b051a1 | 1314 | comp = sk_SSL_COMP_value(sctx->comp_methods, i); |
7cea05dc | 1315 | if (!WPACKET_put_bytes_u8(pkt, comp->id)) { |
c48ffbcc | 1316 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1317 | return CON_FUNC_ERROR; |
2c7b4dbc MC |
1318 | } |
1319 | } | |
b9908bf9 | 1320 | } |
09b6c2ef | 1321 | #endif |
2c7b4dbc | 1322 | /* Add the NULL method */ |
7cea05dc | 1323 | if (!WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_close(pkt)) { |
c48ffbcc | 1324 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1325 | return CON_FUNC_ERROR; |
2c7b4dbc | 1326 | } |
761772d7 | 1327 | |
b9908bf9 | 1328 | /* TLS extensions */ |
f63a17d6 MC |
1329 | if (!tls_construct_extensions(s, pkt, SSL_EXT_CLIENT_HELLO, NULL, 0)) { |
1330 | /* SSLfatal() already called */ | |
67ec6d2b | 1331 | return CON_FUNC_ERROR; |
b9908bf9 | 1332 | } |
0f113f3e | 1333 | |
67ec6d2b | 1334 | return CON_FUNC_SUCCESS; |
0f113f3e | 1335 | } |
d02b48c6 | 1336 | |
38b051a1 | 1337 | MSG_PROCESS_RETURN dtls_process_hello_verify(SSL_CONNECTION *s, PACKET *pkt) |
8ba708e5 | 1338 | { |
cb150cbc | 1339 | size_t cookie_len; |
8ba708e5 MC |
1340 | PACKET cookiepkt; |
1341 | ||
1342 | if (!PACKET_forward(pkt, 2) | |
a230b26e | 1343 | || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) { |
c48ffbcc | 1344 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 1345 | return MSG_PROCESS_ERROR; |
8ba708e5 MC |
1346 | } |
1347 | ||
1348 | cookie_len = PACKET_remaining(&cookiepkt); | |
1349 | if (cookie_len > sizeof(s->d1->cookie)) { | |
c48ffbcc | 1350 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_LENGTH_TOO_LONG); |
f63a17d6 | 1351 | return MSG_PROCESS_ERROR; |
8ba708e5 MC |
1352 | } |
1353 | ||
1354 | if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) { | |
c48ffbcc | 1355 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 1356 | return MSG_PROCESS_ERROR; |
8ba708e5 MC |
1357 | } |
1358 | s->d1->cookie_len = cookie_len; | |
1359 | ||
1360 | return MSG_PROCESS_FINISHED_READING; | |
8ba708e5 MC |
1361 | } |
1362 | ||
38b051a1 TM |
1363 | static int set_client_ciphersuite(SSL_CONNECTION *s, |
1364 | const unsigned char *cipherchars) | |
b9908bf9 MC |
1365 | { |
1366 | STACK_OF(SSL_CIPHER) *sk; | |
1367 | const SSL_CIPHER *c; | |
11c67eea | 1368 | int i; |
38b051a1 | 1369 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
11c67eea MC |
1370 | |
1371 | c = ssl_get_cipher_by_char(s, cipherchars, 0); | |
1372 | if (c == NULL) { | |
1373 | /* unknown cipher */ | |
c48ffbcc | 1374 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_UNKNOWN_CIPHER_RETURNED); |
11c67eea MC |
1375 | return 0; |
1376 | } | |
1377 | /* | |
1378 | * If it is a disabled cipher we either didn't send it in client hello, | |
1379 | * or it's not allowed for the selected protocol. So we return an error. | |
1380 | */ | |
8af91fd9 | 1381 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK, 1)) { |
c48ffbcc | 1382 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CIPHER_RETURNED); |
11c67eea MC |
1383 | return 0; |
1384 | } | |
1385 | ||
1386 | sk = ssl_get_ciphers_by_id(s); | |
1387 | i = sk_SSL_CIPHER_find(sk, c); | |
1388 | if (i < 0) { | |
1389 | /* we did not say we would use this cipher */ | |
c48ffbcc | 1390 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CIPHER_RETURNED); |
11c67eea MC |
1391 | return 0; |
1392 | } | |
1393 | ||
38b051a1 | 1394 | if (SSL_CONNECTION_IS_TLS13(s) && s->s3.tmp.new_cipher != NULL |
555cbb32 | 1395 | && s->s3.tmp.new_cipher->id != c->id) { |
11c67eea | 1396 | /* ServerHello selected a different ciphersuite to that in the HRR */ |
c48ffbcc | 1397 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CIPHER_RETURNED); |
11c67eea MC |
1398 | return 0; |
1399 | } | |
1400 | ||
1401 | /* | |
1402 | * Depending on the session caching (internal/external), the cipher | |
1403 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
1404 | * set and use it for comparison. | |
1405 | */ | |
1406 | if (s->session->cipher != NULL) | |
1407 | s->session->cipher_id = s->session->cipher->id; | |
1408 | if (s->hit && (s->session->cipher_id != c->id)) { | |
38b051a1 TM |
1409 | if (SSL_CONNECTION_IS_TLS13(s)) { |
1410 | const EVP_MD *md = ssl_md(sctx, c->algorithm2); | |
b740012f | 1411 | |
a055a881 MC |
1412 | /* |
1413 | * In TLSv1.3 it is valid for the server to select a different | |
1414 | * ciphersuite as long as the hash is the same. | |
1415 | */ | |
b740012f | 1416 | if (md == NULL |
38b051a1 | 1417 | || md != ssl_md(sctx, s->session->cipher->algorithm2)) { |
f63a17d6 | 1418 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 | 1419 | SSL_R_CIPHERSUITE_DIGEST_HAS_CHANGED); |
a055a881 MC |
1420 | return 0; |
1421 | } | |
1422 | } else { | |
1423 | /* | |
1424 | * Prior to TLSv1.3 resuming a session always meant using the same | |
1425 | * ciphersuite. | |
1426 | */ | |
c48ffbcc | 1427 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 | 1428 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); |
a055a881 MC |
1429 | return 0; |
1430 | } | |
11c67eea | 1431 | } |
555cbb32 | 1432 | s->s3.tmp.new_cipher = c; |
11c67eea MC |
1433 | |
1434 | return 1; | |
1435 | } | |
1436 | ||
38b051a1 | 1437 | MSG_PROCESS_RETURN tls_process_server_hello(SSL_CONNECTION *s, PACKET *pkt) |
11c67eea | 1438 | { |
332eb390 | 1439 | PACKET session_id, extpkt; |
b9908bf9 | 1440 | size_t session_id_len; |
b6981744 | 1441 | const unsigned char *cipherchars; |
597c51bc | 1442 | int hrr = 0; |
b9908bf9 | 1443 | unsigned int compression; |
4fa52141 | 1444 | unsigned int sversion; |
3434f40b | 1445 | unsigned int context; |
332eb390 | 1446 | RAW_EXTENSION *extensions = NULL; |
38b051a1 | 1447 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
b9908bf9 MC |
1448 | #ifndef OPENSSL_NO_COMP |
1449 | SSL_COMP *comp; | |
1450 | #endif | |
1451 | ||
4fa52141 | 1452 | if (!PACKET_get_net_2(pkt, &sversion)) { |
c48ffbcc | 1453 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 1454 | goto err; |
4fa52141 | 1455 | } |
50932c4a | 1456 | |
c3043dcd | 1457 | /* load the server random */ |
597c51bc MC |
1458 | if (s->version == TLS1_3_VERSION |
1459 | && sversion == TLS1_2_VERSION | |
1460 | && PACKET_remaining(pkt) >= SSL3_RANDOM_SIZE | |
1461 | && memcmp(hrrrandom, PACKET_data(pkt), SSL3_RANDOM_SIZE) == 0) { | |
d204a50b TM |
1462 | if (s->hello_retry_request != SSL_HRR_NONE) { |
1463 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_R_UNEXPECTED_MESSAGE); | |
1464 | goto err; | |
1465 | } | |
fc7129dc | 1466 | s->hello_retry_request = SSL_HRR_PENDING; |
9cd9e097 | 1467 | /* Tell the record layer that we know we're going to get TLSv1.3 */ |
1d367677 MC |
1468 | if (!ssl_set_record_protocol_version(s, s->version)) { |
1469 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
1470 | goto err; | |
1471 | } | |
fc7129dc | 1472 | hrr = 1; |
597c51bc | 1473 | if (!PACKET_forward(pkt, SSL3_RANDOM_SIZE)) { |
c48ffbcc | 1474 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
597c51bc MC |
1475 | goto err; |
1476 | } | |
1477 | } else { | |
555cbb32 | 1478 | if (!PACKET_copy_bytes(pkt, s->s3.server_random, SSL3_RANDOM_SIZE)) { |
c48ffbcc | 1479 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
597c51bc MC |
1480 | goto err; |
1481 | } | |
c3043dcd MC |
1482 | } |
1483 | ||
88050dd1 MC |
1484 | /* Get the session-id. */ |
1485 | if (!PACKET_get_length_prefixed_1(pkt, &session_id)) { | |
c48ffbcc | 1486 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 1487 | goto err; |
0f113f3e | 1488 | } |
88050dd1 MC |
1489 | session_id_len = PACKET_remaining(&session_id); |
1490 | if (session_id_len > sizeof(s->session->session_id) | |
1491 | || session_id_len > SSL3_SESSION_ID_SIZE) { | |
c48ffbcc | 1492 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_SSL3_SESSION_ID_TOO_LONG); |
f63a17d6 | 1493 | goto err; |
524420d8 MC |
1494 | } |
1495 | ||
73999b62 | 1496 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
c48ffbcc | 1497 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 1498 | goto err; |
fc5ce51d EK |
1499 | } |
1500 | ||
88050dd1 | 1501 | if (!PACKET_get_1(pkt, &compression)) { |
c48ffbcc | 1502 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
88050dd1 | 1503 | goto err; |
4ff65f77 MC |
1504 | } |
1505 | ||
1506 | /* TLS extensions */ | |
597c51bc | 1507 | if (PACKET_remaining(pkt) == 0 && !hrr) { |
4ff65f77 | 1508 | PACKET_null_init(&extpkt); |
26b9172a MC |
1509 | } else if (!PACKET_as_length_prefixed_2(pkt, &extpkt) |
1510 | || PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 1511 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_LENGTH); |
f63a17d6 | 1512 | goto err; |
4ff65f77 MC |
1513 | } |
1514 | ||
597c51bc MC |
1515 | if (!hrr) { |
1516 | if (!tls_collect_extensions(s, &extpkt, | |
1517 | SSL_EXT_TLS1_2_SERVER_HELLO | |
1518 | | SSL_EXT_TLS1_3_SERVER_HELLO, | |
1519 | &extensions, NULL, 1)) { | |
1520 | /* SSLfatal() already called */ | |
1521 | goto err; | |
1522 | } | |
1523 | ||
1524 | if (!ssl_choose_client_version(s, sversion, extensions)) { | |
1525 | /* SSLfatal() already called */ | |
1526 | goto err; | |
1527 | } | |
88050dd1 MC |
1528 | } |
1529 | ||
38b051a1 | 1530 | if (SSL_CONNECTION_IS_TLS13(s) || hrr) { |
597c51bc MC |
1531 | if (compression != 0) { |
1532 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, | |
597c51bc MC |
1533 | SSL_R_INVALID_COMPRESSION_ALGORITHM); |
1534 | goto err; | |
1535 | } | |
1536 | ||
1537 | if (session_id_len != s->tmp_session_id_len | |
1538 | || memcmp(PACKET_data(&session_id), s->tmp_session_id, | |
1539 | session_id_len) != 0) { | |
c48ffbcc | 1540 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_INVALID_SESSION_ID); |
597c51bc MC |
1541 | goto err; |
1542 | } | |
1543 | } | |
1544 | ||
1545 | if (hrr) { | |
1546 | if (!set_client_ciphersuite(s, cipherchars)) { | |
1547 | /* SSLfatal() already called */ | |
1548 | goto err; | |
1549 | } | |
1550 | ||
1551 | return tls_process_as_hello_retry_request(s, &extpkt); | |
88050dd1 MC |
1552 | } |
1553 | ||
1554 | /* | |
1555 | * Now we have chosen the version we need to check again that the extensions | |
1556 | * are appropriate for this version. | |
1557 | */ | |
38b051a1 TM |
1558 | context = SSL_CONNECTION_IS_TLS13(s) ? SSL_EXT_TLS1_3_SERVER_HELLO |
1559 | : SSL_EXT_TLS1_2_SERVER_HELLO; | |
88050dd1 | 1560 | if (!tls_validate_all_contexts(s, context, extensions)) { |
c48ffbcc | 1561 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_EXTENSION); |
88050dd1 MC |
1562 | goto err; |
1563 | } | |
1564 | ||
4ff65f77 MC |
1565 | s->hit = 0; |
1566 | ||
38b051a1 | 1567 | if (SSL_CONNECTION_IS_TLS13(s)) { |
a5816a5a MC |
1568 | /* |
1569 | * In TLSv1.3 a ServerHello message signals a key change so the end of | |
1570 | * the message must be on a record boundary. | |
1571 | */ | |
1572 | if (RECORD_LAYER_processed_read_pending(&s->rlayer)) { | |
1573 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, | |
a5816a5a MC |
1574 | SSL_R_NOT_ON_RECORD_BOUNDARY); |
1575 | goto err; | |
1576 | } | |
1577 | ||
4ff65f77 MC |
1578 | /* This will set s->hit if we are resuming */ |
1579 | if (!tls_parse_extension(s, TLSEXT_IDX_psk, | |
fe874d27 | 1580 | SSL_EXT_TLS1_3_SERVER_HELLO, |
88050dd1 | 1581 | extensions, NULL, 0)) { |
f63a17d6 MC |
1582 | /* SSLfatal() already called */ |
1583 | goto err; | |
1584 | } | |
4ff65f77 | 1585 | } else { |
8c1a5343 | 1586 | /* |
4ff65f77 MC |
1587 | * Check if we can resume the session based on external pre-shared |
1588 | * secret. EAP-FAST (RFC 4851) supports two types of session resumption. | |
1589 | * Resumption based on server-side state works with session IDs. | |
1590 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
1591 | * works by overriding the SessionTicket extension at the application | |
1592 | * layer, and does not send a session ID. (We do not know whether | |
1593 | * EAP-FAST servers would honour the session ID.) Therefore, the session | |
1594 | * ID alone is not a reliable indicator of session resumption, so we | |
1595 | * first check if we can resume, and later peek at the next handshake | |
1596 | * message to see if the server wants to resume. | |
8c1a5343 | 1597 | */ |
4ff65f77 MC |
1598 | if (s->version >= TLS1_VERSION |
1599 | && s->ext.session_secret_cb != NULL && s->session->ext.tick) { | |
1600 | const SSL_CIPHER *pref_cipher = NULL; | |
1601 | /* | |
1602 | * s->session->master_key_length is a size_t, but this is an int for | |
1603 | * backwards compat reasons | |
1604 | */ | |
1605 | int master_key_length; | |
38b051a1 | 1606 | |
4ff65f77 | 1607 | master_key_length = sizeof(s->session->master_key); |
38b051a1 | 1608 | if (s->ext.session_secret_cb(ssl, s->session->master_key, |
4ff65f77 MC |
1609 | &master_key_length, |
1610 | NULL, &pref_cipher, | |
1611 | s->ext.session_secret_cb_arg) | |
1612 | && master_key_length > 0) { | |
1613 | s->session->master_key_length = master_key_length; | |
1614 | s->session->cipher = pref_cipher ? | |
60d685d1 | 1615 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars, 0); |
4ff65f77 | 1616 | } else { |
c48ffbcc | 1617 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f63a17d6 | 1618 | goto err; |
4ff65f77 | 1619 | } |
0f113f3e | 1620 | } |
4ff65f77 MC |
1621 | |
1622 | if (session_id_len != 0 | |
1623 | && session_id_len == s->session->session_id_length | |
1624 | && memcmp(PACKET_data(&session_id), s->session->session_id, | |
1625 | session_id_len) == 0) | |
1626 | s->hit = 1; | |
50932c4a MC |
1627 | } |
1628 | ||
4ff65f77 | 1629 | if (s->hit) { |
0f113f3e | 1630 | if (s->sid_ctx_length != s->session->sid_ctx_length |
4ff65f77 | 1631 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { |
0f113f3e | 1632 | /* actually a client application bug */ |
f63a17d6 | 1633 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 MC |
1634 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); |
1635 | goto err; | |
0f113f3e | 1636 | } |
6e3d0153 | 1637 | } else { |
0f113f3e | 1638 | /* |
6e3d0153 | 1639 | * If we were trying for session-id reuse but the server |
4ff65f77 | 1640 | * didn't resume, make a new SSL_SESSION. |
6e3d0153 EK |
1641 | * In the case of EAP-FAST and PAC, we do not send a session ID, |
1642 | * so the PAC-based session secret is always preserved. It'll be | |
1643 | * overwritten if the server refuses resumption. | |
0f113f3e | 1644 | */ |
c96ce52c | 1645 | if (s->session->session_id_length > 0) { |
acce0557 | 1646 | ssl_tsan_counter(s->session_ctx, &s->session_ctx->stats.sess_miss); |
0f113f3e | 1647 | if (!ssl_get_new_session(s, 0)) { |
f63a17d6 MC |
1648 | /* SSLfatal() already called */ |
1649 | goto err; | |
0f113f3e MC |
1650 | } |
1651 | } | |
50932c4a | 1652 | |
ccae4a15 | 1653 | s->session->ssl_version = s->version; |
a5816a5a MC |
1654 | /* |
1655 | * In TLSv1.2 and below we save the session id we were sent so we can | |
1656 | * resume it later. In TLSv1.3 the session id we were sent is just an | |
1657 | * echo of what we originally sent in the ClientHello and should not be | |
1658 | * used for resumption. | |
1659 | */ | |
38b051a1 | 1660 | if (!SSL_CONNECTION_IS_TLS13(s)) { |
a5816a5a MC |
1661 | s->session->session_id_length = session_id_len; |
1662 | /* session_id_len could be 0 */ | |
1663 | if (session_id_len > 0) | |
1664 | memcpy(s->session->session_id, PACKET_data(&session_id), | |
1665 | session_id_len); | |
1666 | } | |
0f113f3e | 1667 | } |
fc5ce51d | 1668 | |
ccae4a15 FI |
1669 | /* Session version and negotiated protocol version should match */ |
1670 | if (s->version != s->session->ssl_version) { | |
c48ffbcc | 1671 | SSLfatal(s, SSL_AD_PROTOCOL_VERSION, |
f63a17d6 MC |
1672 | SSL_R_SSL_SESSION_VERSION_MISMATCH); |
1673 | goto err; | |
ccae4a15 | 1674 | } |
0f113f3e | 1675 | /* |
3eb2aff4 KR |
1676 | * Now that we know the version, update the check to see if it's an allowed |
1677 | * version. | |
1678 | */ | |
555cbb32 TS |
1679 | s->s3.tmp.min_ver = s->version; |
1680 | s->s3.tmp.max_ver = s->version; | |
0f113f3e | 1681 | |
11c67eea | 1682 | if (!set_client_ciphersuite(s, cipherchars)) { |
f63a17d6 MC |
1683 | /* SSLfatal() already called */ |
1684 | goto err; | |
0f113f3e MC |
1685 | } |
1686 | ||
09b6c2ef | 1687 | #ifdef OPENSSL_NO_COMP |
fc5ce51d | 1688 | if (compression != 0) { |
c48ffbcc | 1689 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 MC |
1690 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1691 | goto err; | |
0f113f3e MC |
1692 | } |
1693 | /* | |
1694 | * If compression is disabled we'd better not try to resume a session | |
1695 | * using compression. | |
1696 | */ | |
1697 | if (s->session->compress_meth != 0) { | |
c48ffbcc | 1698 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_INCONSISTENT_COMPRESSION); |
f63a17d6 | 1699 | goto err; |
0f113f3e | 1700 | } |
09b6c2ef | 1701 | #else |
fc5ce51d | 1702 | if (s->hit && compression != s->session->compress_meth) { |
c48ffbcc | 1703 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
dd5a4279 | 1704 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); |
f63a17d6 | 1705 | goto err; |
0f113f3e | 1706 | } |
fc5ce51d | 1707 | if (compression == 0) |
0f113f3e MC |
1708 | comp = NULL; |
1709 | else if (!ssl_allow_compression(s)) { | |
c48ffbcc | 1710 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_COMPRESSION_DISABLED); |
f63a17d6 | 1711 | goto err; |
fc5ce51d | 1712 | } else { |
38b051a1 TM |
1713 | comp = ssl3_comp_find(SSL_CONNECTION_GET_CTX(s)->comp_methods, |
1714 | compression); | |
fc5ce51d | 1715 | } |
0f113f3e | 1716 | |
fc5ce51d | 1717 | if (compression != 0 && comp == NULL) { |
c48ffbcc | 1718 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 MC |
1719 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1720 | goto err; | |
0f113f3e | 1721 | } else { |
555cbb32 | 1722 | s->s3.tmp.new_compression = comp; |
0f113f3e | 1723 | } |
09b6c2ef | 1724 | #endif |
761772d7 | 1725 | |
f63a17d6 MC |
1726 | if (!tls_parse_all_extensions(s, context, extensions, NULL, 0, 1)) { |
1727 | /* SSLfatal() already called */ | |
1728 | goto err; | |
1729 | } | |
332eb390 | 1730 | |
8723588e | 1731 | #ifndef OPENSSL_NO_SCTP |
38b051a1 | 1732 | if (SSL_CONNECTION_IS_DTLS(s) && s->hit) { |
8723588e MC |
1733 | unsigned char sctpauthkey[64]; |
1734 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
09d62b33 | 1735 | size_t labellen; |
8723588e MC |
1736 | |
1737 | /* | |
1738 | * Add new shared key for SCTP-Auth, will be ignored if | |
1739 | * no SCTP used. | |
1740 | */ | |
141eb8c6 MC |
1741 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
1742 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
8723588e | 1743 | |
09d62b33 MT |
1744 | /* Don't include the terminating zero. */ |
1745 | labellen = sizeof(labelbuffer) - 1; | |
1746 | if (s->mode & SSL_MODE_DTLS_SCTP_LABEL_LENGTH_BUG) | |
1747 | labellen += 1; | |
1748 | ||
38b051a1 | 1749 | if (SSL_export_keying_material(ssl, sctpauthkey, |
a230b26e EK |
1750 | sizeof(sctpauthkey), |
1751 | labelbuffer, | |
09d62b33 | 1752 | labellen, NULL, 0, 0) <= 0) { |
c48ffbcc | 1753 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f63a17d6 MC |
1754 | goto err; |
1755 | } | |
8723588e | 1756 | |
38b051a1 | 1757 | BIO_ctrl(SSL_get_wbio(ssl), |
8723588e MC |
1758 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, |
1759 | sizeof(sctpauthkey), sctpauthkey); | |
1760 | } | |
1761 | #endif | |
1762 | ||
92760c21 MC |
1763 | /* |
1764 | * In TLSv1.3 we have some post-processing to change cipher state, otherwise | |
1765 | * we're done with this message | |
1766 | */ | |
38b051a1 TM |
1767 | if (SSL_CONNECTION_IS_TLS13(s) |
1768 | && (!ssl->method->ssl3_enc->setup_key_block(s) | |
1769 | || !ssl->method->ssl3_enc->change_cipher_state(s, | |
92760c21 | 1770 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_READ))) { |
f63a17d6 MC |
1771 | /* SSLfatal() already called */ |
1772 | goto err; | |
92760c21 MC |
1773 | } |
1774 | ||
1b0286a3 | 1775 | OPENSSL_free(extensions); |
b9908bf9 | 1776 | return MSG_PROCESS_CONTINUE_READING; |
f63a17d6 | 1777 | err: |
1b0286a3 | 1778 | OPENSSL_free(extensions); |
b9908bf9 | 1779 | return MSG_PROCESS_ERROR; |
0f113f3e | 1780 | } |
d02b48c6 | 1781 | |
38b051a1 | 1782 | static MSG_PROCESS_RETURN tls_process_as_hello_retry_request(SSL_CONNECTION *s, |
597c51bc | 1783 | PACKET *extpkt) |
3847d426 | 1784 | { |
3847d426 | 1785 | RAW_EXTENSION *extensions = NULL; |
3847d426 | 1786 | |
d4504fe5 MC |
1787 | /* |
1788 | * If we were sending early_data then the enc_write_ctx is now invalid and | |
1789 | * should not be used. | |
1790 | */ | |
1791 | EVP_CIPHER_CTX_free(s->enc_write_ctx); | |
1792 | s->enc_write_ctx = NULL; | |
1793 | ||
597c51bc | 1794 | if (!tls_collect_extensions(s, extpkt, SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST, |
f63a17d6 | 1795 | &extensions, NULL, 1) |
fe874d27 | 1796 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST, |
f63a17d6 MC |
1797 | extensions, NULL, 0, 1)) { |
1798 | /* SSLfatal() already called */ | |
1799 | goto err; | |
1800 | } | |
3847d426 MC |
1801 | |
1802 | OPENSSL_free(extensions); | |
66d4bf6b MC |
1803 | extensions = NULL; |
1804 | ||
5b64ce89 | 1805 | if (s->ext.tls13_cookie_len == 0 && s->s3.tmp.pkey != NULL) { |
66d4bf6b MC |
1806 | /* |
1807 | * We didn't receive a cookie or a new key_share so the next | |
1808 | * ClientHello will not change | |
1809 | */ | |
c48ffbcc | 1810 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_NO_CHANGE_FOLLOWING_HRR); |
f63a17d6 | 1811 | goto err; |
66d4bf6b | 1812 | } |
3847d426 | 1813 | |
11c67eea MC |
1814 | /* |
1815 | * Re-initialise the Transcript Hash. We're going to prepopulate it with | |
1816 | * a synthetic message_hash in place of ClientHello1. | |
1817 | */ | |
43054d3d | 1818 | if (!create_synthetic_message_hash(s, NULL, 0, NULL, 0)) { |
f63a17d6 MC |
1819 | /* SSLfatal() already called */ |
1820 | goto err; | |
11c67eea MC |
1821 | } |
1822 | ||
1823 | /* | |
1824 | * Add this message to the Transcript Hash. Normally this is done | |
1825 | * automatically prior to the message processing stage. However due to the | |
1826 | * need to create the synthetic message hash, we defer that step until now | |
1827 | * for HRR messages. | |
1828 | */ | |
1829 | if (!ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, | |
1830 | s->init_num + SSL3_HM_HEADER_LENGTH)) { | |
f63a17d6 MC |
1831 | /* SSLfatal() already called */ |
1832 | goto err; | |
11c67eea MC |
1833 | } |
1834 | ||
3847d426 | 1835 | return MSG_PROCESS_FINISHED_READING; |
f63a17d6 | 1836 | err: |
3847d426 MC |
1837 | OPENSSL_free(extensions); |
1838 | return MSG_PROCESS_ERROR; | |
1839 | } | |
1840 | ||
3201abeb | 1841 | /* prepare server cert verification by setting s->session->peer_chain from pkt */ |
38b051a1 TM |
1842 | MSG_PROCESS_RETURN tls_process_server_certificate(SSL_CONNECTION *s, |
1843 | PACKET *pkt) | |
b9908bf9 | 1844 | { |
b9908bf9 MC |
1845 | unsigned long cert_list_len, cert_len; |
1846 | X509 *x = NULL; | |
b6981744 | 1847 | const unsigned char *certstart, *certbytes; |
0c3eb279 | 1848 | size_t chainidx; |
e96e0f8e | 1849 | unsigned int context = 0; |
38b051a1 | 1850 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
0f113f3e | 1851 | |
0c3eb279 | 1852 | if ((s->session->peer_chain = sk_X509_new_null()) == NULL) { |
e077455e | 1853 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
cc273a93 | 1854 | goto err; |
0f113f3e MC |
1855 | } |
1856 | ||
38b051a1 | 1857 | if ((SSL_CONNECTION_IS_TLS13(s) && !PACKET_get_1(pkt, &context)) |
e96e0f8e MC |
1858 | || context != 0 |
1859 | || !PACKET_get_net_3(pkt, &cert_list_len) | |
1a281aab MC |
1860 | || PACKET_remaining(pkt) != cert_list_len |
1861 | || PACKET_remaining(pkt) == 0) { | |
c48ffbcc | 1862 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 1863 | goto err; |
0f113f3e | 1864 | } |
d805a57b | 1865 | for (chainidx = 0; PACKET_remaining(pkt); chainidx++) { |
73999b62 | 1866 | if (!PACKET_get_net_3(pkt, &cert_len) |
a230b26e | 1867 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) { |
c48ffbcc | 1868 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_CERT_LENGTH_MISMATCH); |
f63a17d6 | 1869 | goto err; |
0f113f3e MC |
1870 | } |
1871 | ||
df758a85 | 1872 | certstart = certbytes; |
38b051a1 | 1873 | x = X509_new_ex(sctx->libctx, sctx->propq); |
0f113f3e | 1874 | if (x == NULL) { |
e077455e | 1875 | SSLfatal(s, SSL_AD_DECODE_ERROR, ERR_R_ASN1_LIB); |
6725682d SL |
1876 | goto err; |
1877 | } | |
1878 | if (d2i_X509(&x, (const unsigned char **)&certbytes, | |
1879 | cert_len) == NULL) { | |
c48ffbcc | 1880 | SSLfatal(s, SSL_AD_BAD_CERTIFICATE, ERR_R_ASN1_LIB); |
f63a17d6 | 1881 | goto err; |
0f113f3e | 1882 | } |
6725682d | 1883 | |
df758a85 | 1884 | if (certbytes != (certstart + cert_len)) { |
c48ffbcc | 1885 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_CERT_LENGTH_MISMATCH); |
f63a17d6 | 1886 | goto err; |
0f113f3e | 1887 | } |
e96e0f8e | 1888 | |
38b051a1 | 1889 | if (SSL_CONNECTION_IS_TLS13(s)) { |
e96e0f8e MC |
1890 | RAW_EXTENSION *rawexts = NULL; |
1891 | PACKET extensions; | |
1892 | ||
1893 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
c48ffbcc | 1894 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_LENGTH); |
f63a17d6 | 1895 | goto err; |
e96e0f8e | 1896 | } |
fe874d27 MC |
1897 | if (!tls_collect_extensions(s, &extensions, |
1898 | SSL_EXT_TLS1_3_CERTIFICATE, &rawexts, | |
f63a17d6 | 1899 | NULL, chainidx == 0) |
8e1634ec | 1900 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE, |
f63a17d6 | 1901 | rawexts, x, chainidx, |
8e1634ec | 1902 | PACKET_remaining(pkt) == 0)) { |
5ee289ea | 1903 | OPENSSL_free(rawexts); |
f63a17d6 MC |
1904 | /* SSLfatal already called */ |
1905 | goto err; | |
5ee289ea MC |
1906 | } |
1907 | OPENSSL_free(rawexts); | |
e96e0f8e MC |
1908 | } |
1909 | ||
0c3eb279 | 1910 | if (!sk_X509_push(s->session->peer_chain, x)) { |
e077455e | 1911 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
cc273a93 | 1912 | goto err; |
0f113f3e MC |
1913 | } |
1914 | x = NULL; | |
0f113f3e | 1915 | } |
0c3eb279 DDO |
1916 | return MSG_PROCESS_CONTINUE_PROCESSING; |
1917 | ||
1918 | err: | |
1919 | X509_free(x); | |
79b2a2f2 | 1920 | OSSL_STACK_OF_X509_free(s->session->peer_chain); |
0c3eb279 DDO |
1921 | s->session->peer_chain = NULL; |
1922 | return MSG_PROCESS_ERROR; | |
1923 | } | |
0f113f3e | 1924 | |
0c3eb279 DDO |
1925 | /* |
1926 | * Verify the s->session->peer_chain and check server cert type. | |
1927 | * On success set s->session->peer and s->session->verify_result. | |
1928 | * Else the peer certificate verification callback may request retry. | |
1929 | */ | |
38b051a1 TM |
1930 | WORK_STATE tls_post_process_server_certificate(SSL_CONNECTION *s, |
1931 | WORK_STATE wst) | |
0c3eb279 DDO |
1932 | { |
1933 | X509 *x; | |
1934 | EVP_PKEY *pkey = NULL; | |
1935 | const SSL_CERT_LOOKUP *clu; | |
1936 | size_t certidx; | |
1937 | int i; | |
1938 | ||
dfb39f73 TM |
1939 | if (s->rwstate == SSL_RETRY_VERIFY) |
1940 | s->rwstate = SSL_NOTHING; | |
0c3eb279 | 1941 | i = ssl_verify_cert_chain(s, s->session->peer_chain); |
dfb39f73 | 1942 | if (i > 0 && s->rwstate == SSL_RETRY_VERIFY) { |
0c3eb279 DDO |
1943 | return WORK_MORE_A; |
1944 | } | |
c8e2f98c MC |
1945 | /* |
1946 | * The documented interface is that SSL_VERIFY_PEER should be set in order | |
1947 | * for client side verification of the server certificate to take place. | |
1948 | * However, historically the code has only checked that *any* flag is set | |
1949 | * to cause server verification to take place. Use of the other flags makes | |
1950 | * no sense in client mode. An attempt to clean up the semantics was | |
1951 | * reverted because at least one application *only* set | |
1952 | * SSL_VERIFY_FAIL_IF_NO_PEER_CERT. Prior to the clean up this still caused | |
1953 | * server verification to take place, after the clean up it silently did | |
1954 | * nothing. SSL_CTX_set_verify()/SSL_set_verify() cannot validate the flags | |
1955 | * sent to them because they are void functions. Therefore, we now use the | |
1956 | * (less clean) historic behaviour of performing validation if any flag is | |
1957 | * set. The *documented* interface remains the same. | |
1958 | */ | |
dfb39f73 | 1959 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) { |
c6d38183 | 1960 | SSLfatal(s, ssl_x509err2alert(s->verify_result), |
f63a17d6 | 1961 | SSL_R_CERTIFICATE_VERIFY_FAILED); |
0c3eb279 | 1962 | return WORK_ERROR; |
0f113f3e MC |
1963 | } |
1964 | ERR_clear_error(); /* but we keep s->verify_result */ | |
0f113f3e | 1965 | |
0f113f3e MC |
1966 | /* |
1967 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
d4d78943 | 1968 | * which we don't include in statem_srvr.c |
0f113f3e | 1969 | */ |
0c3eb279 | 1970 | x = sk_X509_value(s->session->peer_chain, 0); |
0f113f3e | 1971 | |
8382fd3a | 1972 | pkey = X509_get0_pubkey(x); |
0f113f3e | 1973 | |
55a9a16f | 1974 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
c48ffbcc | 1975 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
f63a17d6 | 1976 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); |
0c3eb279 | 1977 | return WORK_ERROR; |
0f113f3e MC |
1978 | } |
1979 | ||
7f6b466b | 1980 | if ((clu = ssl_cert_lookup_by_pkey(pkey, &certidx)) == NULL) { |
c48ffbcc | 1981 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_UNKNOWN_CERTIFICATE_TYPE); |
0c3eb279 | 1982 | return WORK_ERROR; |
0f113f3e | 1983 | } |
05b8486e DSH |
1984 | /* |
1985 | * Check certificate type is consistent with ciphersuite. For TLS 1.3 | |
1986 | * skip check since TLS 1.3 ciphersuites can be used with any certificate | |
1987 | * type. | |
1988 | */ | |
38b051a1 | 1989 | if (!SSL_CONNECTION_IS_TLS13(s)) { |
555cbb32 | 1990 | if ((clu->amask & s->s3.tmp.new_cipher->algorithm_auth) == 0) { |
c48ffbcc | 1991 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CERTIFICATE_TYPE); |
0c3eb279 | 1992 | return WORK_ERROR; |
05b8486e | 1993 | } |
0f113f3e | 1994 | } |
55a9a16f MC |
1995 | |
1996 | X509_free(s->session->peer); | |
05f0fb9f | 1997 | X509_up_ref(x); |
55a9a16f | 1998 | s->session->peer = x; |
0f113f3e | 1999 | s->session->verify_result = s->verify_result; |
2c5dfdc3 MC |
2000 | |
2001 | /* Save the current hash state for when we receive the CertificateVerify */ | |
38b051a1 | 2002 | if (SSL_CONNECTION_IS_TLS13(s) |
2c5dfdc3 MC |
2003 | && !ssl_handshake_hash(s, s->cert_verify_hash, |
2004 | sizeof(s->cert_verify_hash), | |
2005 | &s->cert_verify_hash_len)) { | |
f63a17d6 | 2006 | /* SSLfatal() already called */; |
0c3eb279 | 2007 | return WORK_ERROR; |
2c5dfdc3 | 2008 | } |
0c3eb279 | 2009 | return WORK_FINISHED_CONTINUE; |
0f113f3e | 2010 | } |
d02b48c6 | 2011 | |
b67cb09f TS |
2012 | #ifndef OPENSSL_NO_COMP_ALG |
2013 | MSG_PROCESS_RETURN tls_process_server_compressed_certificate(SSL_CONNECTION *sc, PACKET *pkt) | |
2014 | { | |
2015 | MSG_PROCESS_RETURN ret = MSG_PROCESS_ERROR; | |
2016 | PACKET tmppkt; | |
2017 | BUF_MEM *buf = BUF_MEM_new(); | |
2018 | ||
2019 | if (tls13_process_compressed_certificate(sc, pkt, &tmppkt, buf) != MSG_PROCESS_ERROR) | |
2020 | ret = tls_process_server_certificate(sc, &tmppkt); | |
2021 | ||
2022 | BUF_MEM_free(buf); | |
2023 | return ret; | |
2024 | } | |
2025 | #endif | |
2026 | ||
38b051a1 | 2027 | static int tls_process_ske_psk_preamble(SSL_CONNECTION *s, PACKET *pkt) |
02a74590 MC |
2028 | { |
2029 | #ifndef OPENSSL_NO_PSK | |
7dc1c647 | 2030 | PACKET psk_identity_hint; |
02a74590 | 2031 | |
7dc1c647 MC |
2032 | /* PSK ciphersuites are preceded by an identity hint */ |
2033 | ||
2034 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) { | |
c48ffbcc | 2035 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
7dc1c647 MC |
2036 | return 0; |
2037 | } | |
2038 | ||
2039 | /* | |
2040 | * Store PSK identity hint for later use, hint is used in | |
2041 | * tls_construct_client_key_exchange. Assume that the maximum length of | |
2042 | * a PSK identity hint can be as long as the maximum length of a PSK | |
2043 | * identity. | |
2044 | */ | |
2045 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { | |
c48ffbcc | 2046 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_DATA_LENGTH_TOO_LONG); |
7dc1c647 MC |
2047 | return 0; |
2048 | } | |
02a74590 | 2049 | |
7dc1c647 MC |
2050 | if (PACKET_remaining(&psk_identity_hint) == 0) { |
2051 | OPENSSL_free(s->session->psk_identity_hint); | |
2052 | s->session->psk_identity_hint = NULL; | |
2053 | } else if (!PACKET_strndup(&psk_identity_hint, | |
a230b26e | 2054 | &s->session->psk_identity_hint)) { |
c48ffbcc | 2055 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
7dc1c647 MC |
2056 | return 0; |
2057 | } | |
2058 | ||
2059 | return 1; | |
2060 | #else | |
c48ffbcc | 2061 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
7dc1c647 | 2062 | return 0; |
02a74590 MC |
2063 | #endif |
2064 | } | |
2065 | ||
38b051a1 | 2066 | static int tls_process_ske_srp(SSL_CONNECTION *s, PACKET *pkt, EVP_PKEY **pkey) |
25c6c10c MC |
2067 | { |
2068 | #ifndef OPENSSL_NO_SRP | |
2069 | PACKET prime, generator, salt, server_pub; | |
2070 | ||
2071 | if (!PACKET_get_length_prefixed_2(pkt, &prime) | |
2072 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
2073 | || !PACKET_get_length_prefixed_1(pkt, &salt) | |
2074 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) { | |
c48ffbcc | 2075 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
25c6c10c MC |
2076 | return 0; |
2077 | } | |
2078 | ||
2079 | if ((s->srp_ctx.N = | |
2080 | BN_bin2bn(PACKET_data(&prime), | |
348240c6 | 2081 | (int)PACKET_remaining(&prime), NULL)) == NULL |
25c6c10c MC |
2082 | || (s->srp_ctx.g = |
2083 | BN_bin2bn(PACKET_data(&generator), | |
348240c6 | 2084 | (int)PACKET_remaining(&generator), NULL)) == NULL |
25c6c10c MC |
2085 | || (s->srp_ctx.s = |
2086 | BN_bin2bn(PACKET_data(&salt), | |
348240c6 | 2087 | (int)PACKET_remaining(&salt), NULL)) == NULL |
25c6c10c MC |
2088 | || (s->srp_ctx.B = |
2089 | BN_bin2bn(PACKET_data(&server_pub), | |
348240c6 | 2090 | (int)PACKET_remaining(&server_pub), NULL)) == NULL) { |
c48ffbcc | 2091 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_BN_LIB); |
25c6c10c MC |
2092 | return 0; |
2093 | } | |
2094 | ||
a2c2e000 MC |
2095 | if (!srp_verify_server_param(s)) { |
2096 | /* SSLfatal() already called */ | |
25c6c10c MC |
2097 | return 0; |
2098 | } | |
2099 | ||
2100 | /* We must check if there is a certificate */ | |
555cbb32 | 2101 | if (s->s3.tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
25c6c10c MC |
2102 | *pkey = X509_get0_pubkey(s->session->peer); |
2103 | ||
2104 | return 1; | |
2105 | #else | |
c48ffbcc | 2106 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
25c6c10c MC |
2107 | return 0; |
2108 | #endif | |
2109 | } | |
2110 | ||
38b051a1 | 2111 | static int tls_process_ske_dhe(SSL_CONNECTION *s, PACKET *pkt, EVP_PKEY **pkey) |
e01a610d | 2112 | { |
e01a610d MC |
2113 | PACKET prime, generator, pub_key; |
2114 | EVP_PKEY *peer_tmp = NULL; | |
e01a610d | 2115 | BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL; |
1ee22dc2 MC |
2116 | EVP_PKEY_CTX *pctx = NULL; |
2117 | OSSL_PARAM *params = NULL; | |
2118 | OSSL_PARAM_BLD *tmpl = NULL; | |
38b051a1 | 2119 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
1ee22dc2 | 2120 | int ret = 0; |
26505153 | 2121 | |
e01a610d MC |
2122 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
2123 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
2124 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) { | |
c48ffbcc | 2125 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
e01a610d MC |
2126 | return 0; |
2127 | } | |
2128 | ||
348240c6 MC |
2129 | p = BN_bin2bn(PACKET_data(&prime), (int)PACKET_remaining(&prime), NULL); |
2130 | g = BN_bin2bn(PACKET_data(&generator), (int)PACKET_remaining(&generator), | |
2131 | NULL); | |
2132 | bnpub_key = BN_bin2bn(PACKET_data(&pub_key), | |
2133 | (int)PACKET_remaining(&pub_key), NULL); | |
e01a610d | 2134 | if (p == NULL || g == NULL || bnpub_key == NULL) { |
c48ffbcc | 2135 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_BN_LIB); |
e01a610d MC |
2136 | goto err; |
2137 | } | |
2138 | ||
1ee22dc2 MC |
2139 | tmpl = OSSL_PARAM_BLD_new(); |
2140 | if (tmpl == NULL | |
2141 | || !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_P, p) | |
2142 | || !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_G, g) | |
2143 | || !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_PUB_KEY, | |
2144 | bnpub_key) | |
2145 | || (params = OSSL_PARAM_BLD_to_param(tmpl)) == NULL) { | |
2146 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
e01a610d MC |
2147 | goto err; |
2148 | } | |
e01a610d | 2149 | |
38b051a1 | 2150 | pctx = EVP_PKEY_CTX_new_from_name(sctx->libctx, "DH", sctx->propq); |
1ee22dc2 MC |
2151 | if (pctx == NULL) { |
2152 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
26505153 RL |
2153 | goto err; |
2154 | } | |
2db985b7 SL |
2155 | if (EVP_PKEY_fromdata_init(pctx) <= 0 |
2156 | || EVP_PKEY_fromdata(pctx, &peer_tmp, EVP_PKEY_KEYPAIR, params) <= 0) { | |
1ee22dc2 | 2157 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_DH_VALUE); |
e01a610d MC |
2158 | goto err; |
2159 | } | |
e01a610d | 2160 | |
1ee22dc2 | 2161 | EVP_PKEY_CTX_free(pctx); |
38b051a1 | 2162 | pctx = EVP_PKEY_CTX_new_from_pkey(sctx->libctx, peer_tmp, sctx->propq); |
1ee22dc2 | 2163 | if (pctx == NULL |
899e2564 MC |
2164 | /* |
2165 | * EVP_PKEY_param_check() will verify that the DH params are using | |
2166 | * a safe prime. In this context, because we're using ephemeral DH, | |
2167 | * we're ok with it not being a safe prime. | |
2168 | * EVP_PKEY_param_check_quick() skips the safe prime check. | |
2169 | */ | |
2170 | || EVP_PKEY_param_check_quick(pctx) != 1 | |
1ee22dc2 MC |
2171 | || EVP_PKEY_public_check(pctx) != 1) { |
2172 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_DH_VALUE); | |
e01a610d MC |
2173 | goto err; |
2174 | } | |
2175 | ||
ed576acd TM |
2176 | if (!ssl_security(s, SSL_SECOP_TMP_DH, |
2177 | EVP_PKEY_get_security_bits(peer_tmp), | |
47e81a1b | 2178 | 0, peer_tmp)) { |
c48ffbcc | 2179 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_DH_KEY_TOO_SMALL); |
ada66e78 P |
2180 | goto err; |
2181 | } | |
2182 | ||
555cbb32 | 2183 | s->s3.peer_tmp = peer_tmp; |
1ee22dc2 | 2184 | peer_tmp = NULL; |
e01a610d MC |
2185 | |
2186 | /* | |
2187 | * FIXME: This makes assumptions about which ciphersuites come with | |
2188 | * public keys. We should have a less ad-hoc way of doing this | |
2189 | */ | |
555cbb32 | 2190 | if (s->s3.tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
e01a610d MC |
2191 | *pkey = X509_get0_pubkey(s->session->peer); |
2192 | /* else anonymous DH, so no certificate or pkey. */ | |
2193 | ||
1ee22dc2 | 2194 | ret = 1; |
e01a610d MC |
2195 | |
2196 | err: | |
1ee22dc2 | 2197 | OSSL_PARAM_BLD_free(tmpl); |
3f883c7c | 2198 | OSSL_PARAM_free(params); |
1ee22dc2 MC |
2199 | EVP_PKEY_free(peer_tmp); |
2200 | EVP_PKEY_CTX_free(pctx); | |
e01a610d MC |
2201 | BN_free(p); |
2202 | BN_free(g); | |
2203 | BN_free(bnpub_key); | |
e01a610d | 2204 | |
1ee22dc2 | 2205 | return ret; |
e01a610d MC |
2206 | } |
2207 | ||
38b051a1 | 2208 | static int tls_process_ske_ecdhe(SSL_CONNECTION *s, PACKET *pkt, EVP_PKEY **pkey) |
ff74aeb1 | 2209 | { |
ff74aeb1 | 2210 | PACKET encoded_pt; |
6447e818 | 2211 | unsigned int curve_type, curve_id; |
ff74aeb1 MC |
2212 | |
2213 | /* | |
2214 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
6447e818 | 2215 | * public key. We only support named (not generic) curves and |
ff74aeb1 MC |
2216 | * ECParameters in this case is just three bytes. |
2217 | */ | |
6447e818 | 2218 | if (!PACKET_get_1(pkt, &curve_type) || !PACKET_get_net_2(pkt, &curve_id)) { |
c48ffbcc | 2219 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_TOO_SHORT); |
ff74aeb1 MC |
2220 | return 0; |
2221 | } | |
2222 | /* | |
6447e818 DSH |
2223 | * Check curve is named curve type and one of our preferences, if not |
2224 | * server has sent an invalid curve. | |
ff74aeb1 | 2225 | */ |
dcf8b01f MC |
2226 | if (curve_type != NAMED_CURVE_TYPE |
2227 | || !tls1_check_group_id(s, curve_id, 1)) { | |
c48ffbcc | 2228 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CURVE); |
ff74aeb1 MC |
2229 | return 0; |
2230 | } | |
2231 | ||
ada66e78 | 2232 | if ((s->s3.peer_tmp = ssl_generate_param_group(s, curve_id)) == NULL) { |
c48ffbcc | 2233 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
a2c2e000 | 2234 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
ff74aeb1 MC |
2235 | return 0; |
2236 | } | |
2237 | ||
ff74aeb1 | 2238 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) { |
c48ffbcc | 2239 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
ff74aeb1 MC |
2240 | return 0; |
2241 | } | |
2242 | ||
5ac8fb58 MC |
2243 | if (EVP_PKEY_set1_encoded_public_key(s->s3.peer_tmp, |
2244 | PACKET_data(&encoded_pt), | |
2245 | PACKET_remaining(&encoded_pt)) <= 0) { | |
c48ffbcc | 2246 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_ECPOINT); |
ff74aeb1 MC |
2247 | return 0; |
2248 | } | |
2249 | ||
2250 | /* | |
2251 | * The ECC/TLS specification does not mention the use of DSA to sign | |
2252 | * ECParameters in the server key exchange message. We do support RSA | |
2253 | * and ECDSA. | |
2254 | */ | |
555cbb32 | 2255 | if (s->s3.tmp.new_cipher->algorithm_auth & SSL_aECDSA) |
ff74aeb1 | 2256 | *pkey = X509_get0_pubkey(s->session->peer); |
555cbb32 | 2257 | else if (s->s3.tmp.new_cipher->algorithm_auth & SSL_aRSA) |
ff74aeb1 MC |
2258 | *pkey = X509_get0_pubkey(s->session->peer); |
2259 | /* else anonymous ECDH, so no certificate or pkey. */ | |
2260 | ||
aa6bd216 BK |
2261 | /* Cache the agreed upon group in the SSL_SESSION */ |
2262 | s->session->kex_group = curve_id; | |
ff74aeb1 | 2263 | return 1; |
ff74aeb1 MC |
2264 | } |
2265 | ||
38b051a1 | 2266 | MSG_PROCESS_RETURN tls_process_key_exchange(SSL_CONNECTION *s, PACKET *pkt) |
b9908bf9 | 2267 | { |
e1e588ac | 2268 | long alg_k; |
b9908bf9 | 2269 | EVP_PKEY *pkey = NULL; |
fe3066ee MC |
2270 | EVP_MD_CTX *md_ctx = NULL; |
2271 | EVP_PKEY_CTX *pctx = NULL; | |
73999b62 | 2272 | PACKET save_param_start, signature; |
38b051a1 | 2273 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
b9908bf9 | 2274 | |
555cbb32 | 2275 | alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
b9908bf9 | 2276 | |
73999b62 | 2277 | save_param_start = *pkt; |
8d92c1f8 | 2278 | |
555cbb32 TS |
2279 | EVP_PKEY_free(s->s3.peer_tmp); |
2280 | s->s3.peer_tmp = NULL; | |
d02b48c6 | 2281 | |
7689082b | 2282 | if (alg_k & SSL_PSK) { |
a2c2e000 MC |
2283 | if (!tls_process_ske_psk_preamble(s, pkt)) { |
2284 | /* SSLfatal() already called */ | |
7dc1c647 | 2285 | goto err; |
a2c2e000 | 2286 | } |
7689082b DSH |
2287 | } |
2288 | ||
2289 | /* Nothing else to do for plain PSK or RSAPSK */ | |
2290 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
25c6c10c | 2291 | } else if (alg_k & SSL_kSRP) { |
a2c2e000 MC |
2292 | if (!tls_process_ske_srp(s, pkt, &pkey)) { |
2293 | /* SSLfatal() already called */ | |
0f113f3e | 2294 | goto err; |
a2c2e000 | 2295 | } |
e01a610d | 2296 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
a2c2e000 MC |
2297 | if (!tls_process_ske_dhe(s, pkt, &pkey)) { |
2298 | /* SSLfatal() already called */ | |
e01a610d | 2299 | goto err; |
a2c2e000 | 2300 | } |
ff74aeb1 | 2301 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
a2c2e000 MC |
2302 | if (!tls_process_ske_ecdhe(s, pkt, &pkey)) { |
2303 | /* SSLfatal() already called */ | |
ff74aeb1 | 2304 | goto err; |
a2c2e000 | 2305 | } |
0f113f3e | 2306 | } else if (alg_k) { |
c48ffbcc | 2307 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_R_UNEXPECTED_MESSAGE); |
e1e588ac | 2308 | goto err; |
0f113f3e | 2309 | } |
0f113f3e | 2310 | |
0f113f3e MC |
2311 | /* if it was signed, check the signature */ |
2312 | if (pkey != NULL) { | |
32942870 | 2313 | PACKET params; |
be8dba2c | 2314 | const EVP_MD *md = NULL; |
72ceb6a6 DSH |
2315 | unsigned char *tbs; |
2316 | size_t tbslen; | |
2317 | int rv; | |
e1e588ac | 2318 | |
32942870 EK |
2319 | /* |
2320 | * |pkt| now points to the beginning of the signature, so the difference | |
2321 | * equals the length of the parameters. | |
2322 | */ | |
2323 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms, | |
2324 | PACKET_remaining(&save_param_start) - | |
73999b62 | 2325 | PACKET_remaining(pkt))) { |
c48ffbcc | 2326 | SSLfatal(s, SSL_AD_DECODE_ERROR, ERR_R_INTERNAL_ERROR); |
e1e588ac | 2327 | goto err; |
32942870 EK |
2328 | } |
2329 | ||
0f113f3e | 2330 | if (SSL_USE_SIGALGS(s)) { |
703bcee0 | 2331 | unsigned int sigalg; |
703bcee0 MC |
2332 | |
2333 | if (!PACKET_get_net_2(pkt, &sigalg)) { | |
c48ffbcc | 2334 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_TOO_SHORT); |
e1e588ac | 2335 | goto err; |
0f113f3e | 2336 | } |
f63a17d6 MC |
2337 | if (tls12_check_peer_sigalg(s, sigalg, pkey) <=0) { |
2338 | /* SSLfatal() already called */ | |
0f113f3e | 2339 | goto err; |
0f113f3e | 2340 | } |
f365a3e2 | 2341 | } else if (!tls1_set_peer_legacy_sigalg(s, pkey)) { |
c48ffbcc | 2342 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f365a3e2 | 2343 | goto err; |
32942870 | 2344 | } |
0f113f3e | 2345 | |
38b051a1 | 2346 | if (!tls1_lookup_md(sctx, s->s3.tmp.peer_sigalg, &md)) { |
c48ffbcc | 2347 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
7cd1420b | 2348 | SSL_R_NO_SUITABLE_DIGEST_ALGORITHM); |
b2021556 DSH |
2349 | goto err; |
2350 | } | |
44f23cd2 | 2351 | if (SSL_USE_SIGALGS(s)) |
49b26f54 | 2352 | OSSL_TRACE1(TLS, "USING TLSv1.2 HASH %s\n", |
ed576acd | 2353 | md == NULL ? "n/a" : EVP_MD_get0_name(md)); |
f365a3e2 | 2354 | |
73999b62 MC |
2355 | if (!PACKET_get_length_prefixed_2(pkt, &signature) |
2356 | || PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 2357 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
e1e588ac | 2358 | goto err; |
0f113f3e | 2359 | } |
e1e588ac MC |
2360 | |
2361 | md_ctx = EVP_MD_CTX_new(); | |
2362 | if (md_ctx == NULL) { | |
e077455e | 2363 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
e1e588ac | 2364 | goto err; |
0f113f3e | 2365 | } |
e1e588ac | 2366 | |
d8652be0 | 2367 | if (EVP_DigestVerifyInit_ex(md_ctx, &pctx, |
ed576acd | 2368 | md == NULL ? NULL : EVP_MD_get0_name(md), |
38b051a1 | 2369 | sctx->libctx, sctx->propq, pkey, |
d38b6ae9 | 2370 | NULL) <= 0) { |
c48ffbcc | 2371 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
fe3066ee MC |
2372 | goto err; |
2373 | } | |
5554facb | 2374 | if (SSL_USE_PSS(s)) { |
fe3066ee | 2375 | if (EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) <= 0 |
91410d40 | 2376 | || EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, |
968ae5b3 | 2377 | RSA_PSS_SALTLEN_DIGEST) <= 0) { |
c48ffbcc | 2378 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
fe3066ee MC |
2379 | goto err; |
2380 | } | |
2381 | } | |
72ceb6a6 DSH |
2382 | tbslen = construct_key_exchange_tbs(s, &tbs, PACKET_data(¶ms), |
2383 | PACKET_remaining(¶ms)); | |
2384 | if (tbslen == 0) { | |
f63a17d6 | 2385 | /* SSLfatal() already called */ |
e1e588ac | 2386 | goto err; |
192e4bbb | 2387 | } |
72ceb6a6 DSH |
2388 | |
2389 | rv = EVP_DigestVerify(md_ctx, PACKET_data(&signature), | |
2390 | PACKET_remaining(&signature), tbs, tbslen); | |
2391 | OPENSSL_free(tbs); | |
cfba0675 | 2392 | if (rv <= 0) { |
c48ffbcc | 2393 | SSLfatal(s, SSL_AD_DECRYPT_ERROR, SSL_R_BAD_SIGNATURE); |
e1e588ac | 2394 | goto err; |
0f113f3e | 2395 | } |
e1e588ac | 2396 | EVP_MD_CTX_free(md_ctx); |
fe3066ee | 2397 | md_ctx = NULL; |
0f113f3e | 2398 | } else { |
7689082b | 2399 | /* aNULL, aSRP or PSK do not need public keys */ |
555cbb32 | 2400 | if (!(s->s3.tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP)) |
a230b26e | 2401 | && !(alg_k & SSL_PSK)) { |
0f113f3e | 2402 | /* Might be wrong key type, check it */ |
e1e588ac | 2403 | if (ssl3_check_cert_and_algorithm(s)) { |
c48ffbcc | 2404 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_DATA); |
e1e588ac | 2405 | } |
a2c2e000 | 2406 | /* else this shouldn't happen, SSLfatal() already called */ |
0f113f3e MC |
2407 | goto err; |
2408 | } | |
2409 | /* still data left over */ | |
73999b62 | 2410 | if (PACKET_remaining(pkt) != 0) { |
c48ffbcc | 2411 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_EXTRA_DATA_IN_MESSAGE); |
e1e588ac | 2412 | goto err; |
0f113f3e MC |
2413 | } |
2414 | } | |
e1e588ac | 2415 | |
b9908bf9 | 2416 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2417 | err: |
fe3066ee | 2418 | EVP_MD_CTX_free(md_ctx); |
b9908bf9 | 2419 | return MSG_PROCESS_ERROR; |
0f113f3e | 2420 | } |
d02b48c6 | 2421 | |
38b051a1 TM |
2422 | MSG_PROCESS_RETURN tls_process_certificate_request(SSL_CONNECTION *s, |
2423 | PACKET *pkt) | |
b9908bf9 | 2424 | { |
32f66107 DSH |
2425 | size_t i; |
2426 | ||
2427 | /* Clear certificate validity flags */ | |
2428 | for (i = 0; i < SSL_PKEY_NUM; i++) | |
555cbb32 | 2429 | s->s3.tmp.valid_flags[i] = 0; |
0f113f3e | 2430 | |
38b051a1 | 2431 | if (SSL_CONNECTION_IS_TLS13(s)) { |
32f66107 DSH |
2432 | PACKET reqctx, extensions; |
2433 | RAW_EXTENSION *rawexts = NULL; | |
03f44b97 | 2434 | |
1bf4cb0f MC |
2435 | if ((s->shutdown & SSL_SENT_SHUTDOWN) != 0) { |
2436 | /* | |
2437 | * We already sent close_notify. This can only happen in TLSv1.3 | |
2438 | * post-handshake messages. We can't reasonably respond to this, so | |
2439 | * we just ignore it | |
2440 | */ | |
2441 | return MSG_PROCESS_FINISHED_READING; | |
2442 | } | |
2443 | ||
03f44b97 | 2444 | /* Free and zero certificate types: it is not present in TLS 1.3 */ |
555cbb32 TS |
2445 | OPENSSL_free(s->s3.tmp.ctype); |
2446 | s->s3.tmp.ctype = NULL; | |
2447 | s->s3.tmp.ctype_len = 0; | |
9d75dce3 TS |
2448 | OPENSSL_free(s->pha_context); |
2449 | s->pha_context = NULL; | |
39a14059 | 2450 | s->pha_context_len = 0; |
32f66107 | 2451 | |
9d75dce3 TS |
2452 | if (!PACKET_get_length_prefixed_1(pkt, &reqctx) || |
2453 | !PACKET_memdup(&reqctx, &s->pha_context, &s->pha_context_len)) { | |
c48ffbcc | 2454 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2455 | return MSG_PROCESS_ERROR; |
03f44b97 | 2456 | } |
32f66107 DSH |
2457 | |
2458 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
c48ffbcc | 2459 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_LENGTH); |
f63a17d6 | 2460 | return MSG_PROCESS_ERROR; |
32f66107 DSH |
2461 | } |
2462 | if (!tls_collect_extensions(s, &extensions, | |
fe874d27 | 2463 | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, |
f63a17d6 | 2464 | &rawexts, NULL, 1) |
fe874d27 | 2465 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, |
f63a17d6 MC |
2466 | rawexts, NULL, 0, 1)) { |
2467 | /* SSLfatal() already called */ | |
32f66107 | 2468 | OPENSSL_free(rawexts); |
f63a17d6 | 2469 | return MSG_PROCESS_ERROR; |
32f66107 DSH |
2470 | } |
2471 | OPENSSL_free(rawexts); | |
2472 | if (!tls1_process_sigalgs(s)) { | |
c48ffbcc | 2473 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_LENGTH); |
f63a17d6 | 2474 | return MSG_PROCESS_ERROR; |
32f66107 | 2475 | } |
03f44b97 DSH |
2476 | } else { |
2477 | PACKET ctypes; | |
75c13e78 | 2478 | |
03f44b97 DSH |
2479 | /* get the certificate types */ |
2480 | if (!PACKET_get_length_prefixed_1(pkt, &ctypes)) { | |
c48ffbcc | 2481 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2482 | return MSG_PROCESS_ERROR; |
03f44b97 DSH |
2483 | } |
2484 | ||
555cbb32 | 2485 | if (!PACKET_memdup(&ctypes, &s->s3.tmp.ctype, &s->s3.tmp.ctype_len)) { |
c48ffbcc | 2486 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f63a17d6 | 2487 | return MSG_PROCESS_ERROR; |
03f44b97 | 2488 | } |
ac112332 | 2489 | |
32f66107 DSH |
2490 | if (SSL_USE_SIGALGS(s)) { |
2491 | PACKET sigalgs; | |
703bcee0 | 2492 | |
32f66107 | 2493 | if (!PACKET_get_length_prefixed_2(pkt, &sigalgs)) { |
c48ffbcc | 2494 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2495 | return MSG_PROCESS_ERROR; |
32f66107 | 2496 | } |
ac112332 | 2497 | |
c589c34e BK |
2498 | /* |
2499 | * Despite this being for certificates, preserve compatibility | |
2500 | * with pre-TLS 1.3 and use the regular sigalgs field. | |
2501 | */ | |
2502 | if (!tls1_save_sigalgs(s, &sigalgs, 0)) { | |
f63a17d6 | 2503 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
f63a17d6 MC |
2504 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); |
2505 | return MSG_PROCESS_ERROR; | |
32f66107 DSH |
2506 | } |
2507 | if (!tls1_process_sigalgs(s)) { | |
e077455e | 2508 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_SSL_LIB); |
f63a17d6 | 2509 | return MSG_PROCESS_ERROR; |
32f66107 | 2510 | } |
0f113f3e | 2511 | } |
0f113f3e | 2512 | |
32f66107 | 2513 | /* get the CA RDNs */ |
f63a17d6 MC |
2514 | if (!parse_ca_names(s, pkt)) { |
2515 | /* SSLfatal() already called */ | |
2516 | return MSG_PROCESS_ERROR; | |
2517 | } | |
03f44b97 DSH |
2518 | } |
2519 | ||
2520 | if (PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 2521 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2522 | return MSG_PROCESS_ERROR; |
03f44b97 | 2523 | } |
0f113f3e | 2524 | |
0f113f3e | 2525 | /* we should setup a certificate to return.... */ |
555cbb32 | 2526 | s->s3.tmp.cert_req = 1; |
0f113f3e | 2527 | |
e4562014 MC |
2528 | /* |
2529 | * In TLSv1.3 we don't prepare the client certificate yet. We wait until | |
2530 | * after the CertificateVerify message has been received. This is because | |
2531 | * in TLSv1.3 the CertificateRequest arrives before the Certificate message | |
2532 | * but in TLSv1.2 it is the other way around. We want to make sure that | |
8c2bfd25 | 2533 | * SSL_get1_peer_certificate() returns something sensible in |
e4562014 MC |
2534 | * client_cert_cb. |
2535 | */ | |
38b051a1 TM |
2536 | if (SSL_CONNECTION_IS_TLS13(s) |
2537 | && s->post_handshake_auth != SSL_PHA_REQUESTED) | |
e4562014 MC |
2538 | return MSG_PROCESS_CONTINUE_READING; |
2539 | ||
f63a17d6 | 2540 | return MSG_PROCESS_CONTINUE_PROCESSING; |
0f113f3e MC |
2541 | } |
2542 | ||
38b051a1 TM |
2543 | MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL_CONNECTION *s, |
2544 | PACKET *pkt) | |
b9908bf9 | 2545 | { |
b9908bf9 | 2546 | unsigned int ticklen; |
9ac6244b | 2547 | unsigned long ticket_lifetime_hint, age_add = 0; |
ec60ccc1 | 2548 | unsigned int sess_len; |
de1df7e9 | 2549 | RAW_EXTENSION *exts = NULL; |
9b6a8254 | 2550 | PACKET nonce; |
abd86cec | 2551 | EVP_MD *sha256 = NULL; |
38b051a1 | 2552 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
b9908bf9 | 2553 | |
6cf2dbd9 MC |
2554 | PACKET_null_init(&nonce); |
2555 | ||
73999b62 | 2556 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint) |
38b051a1 | 2557 | || (SSL_CONNECTION_IS_TLS13(s) |
9b6a8254 | 2558 | && (!PACKET_get_net_4(pkt, &age_add) |
6cf2dbd9 | 2559 | || !PACKET_get_length_prefixed_1(pkt, &nonce))) |
a230b26e | 2560 | || !PACKET_get_net_2(pkt, &ticklen) |
38b051a1 TM |
2561 | || (SSL_CONNECTION_IS_TLS13(s) ? (ticklen == 0 |
2562 | || PACKET_remaining(pkt) < ticklen) | |
2563 | : PACKET_remaining(pkt) != ticklen)) { | |
c48ffbcc | 2564 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2565 | goto err; |
e711da71 EK |
2566 | } |
2567 | ||
de1df7e9 MC |
2568 | /* |
2569 | * Server is allowed to change its mind (in <=TLSv1.2) and send an empty | |
2570 | * ticket. We already checked this TLSv1.3 case above, so it should never | |
2571 | * be 0 here in that instance | |
2572 | */ | |
e711da71 | 2573 | if (ticklen == 0) |
c9de4a20 | 2574 | return MSG_PROCESS_CONTINUE_READING; |
e711da71 | 2575 | |
150840b9 MC |
2576 | /* |
2577 | * Sessions must be immutable once they go into the session cache. Otherwise | |
2578 | * we can get multi-thread problems. Therefore we don't "update" sessions, | |
2579 | * we replace them with a duplicate. In TLSv1.3 we need to do this every | |
2580 | * time a NewSessionTicket arrives because those messages arrive | |
2581 | * post-handshake and the session may have already gone into the session | |
2582 | * cache. | |
2583 | */ | |
38b051a1 | 2584 | if (SSL_CONNECTION_IS_TLS13(s) || s->session->session_id_length > 0) { |
98ece4ee | 2585 | SSL_SESSION *new_sess; |
1f156321 | 2586 | |
98ece4ee MC |
2587 | /* |
2588 | * We reused an existing session, so we need to replace it with a new | |
2589 | * one | |
2590 | */ | |
5d61491c | 2591 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { |
e077455e | 2592 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_SSL_LIB); |
f63a17d6 | 2593 | goto err; |
5d61491c MC |
2594 | } |
2595 | ||
1f156321 | 2596 | if ((s->session_ctx->session_cache_mode & SSL_SESS_CACHE_CLIENT) != 0 |
38b051a1 | 2597 | && !SSL_CONNECTION_IS_TLS13(s)) { |
1f156321 MC |
2598 | /* |
2599 | * In TLSv1.2 and below the arrival of a new tickets signals that | |
2600 | * any old ticket we were using is now out of date, so we remove the | |
2601 | * old session from the cache. We carry on if this fails | |
2602 | */ | |
2603 | SSL_CTX_remove_session(s->session_ctx, s->session); | |
2604 | } | |
2605 | ||
98ece4ee MC |
2606 | SSL_SESSION_free(s->session); |
2607 | s->session = new_sess; | |
2608 | } | |
2609 | ||
f0131dc0 | 2610 | s->session->time = ossl_time_now(); |
25959e04 | 2611 | ssl_session_calculate_timeout(s->session); |
fc24f0bf | 2612 | |
aff8c126 RS |
2613 | OPENSSL_free(s->session->ext.tick); |
2614 | s->session->ext.tick = NULL; | |
2615 | s->session->ext.ticklen = 0; | |
e711da71 | 2616 | |
aff8c126 RS |
2617 | s->session->ext.tick = OPENSSL_malloc(ticklen); |
2618 | if (s->session->ext.tick == NULL) { | |
e077455e | 2619 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
0f113f3e MC |
2620 | goto err; |
2621 | } | |
aff8c126 | 2622 | if (!PACKET_copy_bytes(pkt, s->session->ext.tick, ticklen)) { |
c48ffbcc | 2623 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2624 | goto err; |
561e12bb | 2625 | } |
e711da71 | 2626 | |
aff8c126 | 2627 | s->session->ext.tick_lifetime_hint = ticket_lifetime_hint; |
fc24f0bf | 2628 | s->session->ext.tick_age_add = age_add; |
aff8c126 | 2629 | s->session->ext.ticklen = ticklen; |
de1df7e9 | 2630 | |
38b051a1 | 2631 | if (SSL_CONNECTION_IS_TLS13(s)) { |
de1df7e9 MC |
2632 | PACKET extpkt; |
2633 | ||
2634 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt) | |
1cde0259 | 2635 | || PACKET_remaining(pkt) != 0) { |
c48ffbcc | 2636 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
1cde0259 MC |
2637 | goto err; |
2638 | } | |
2639 | ||
2640 | if (!tls_collect_extensions(s, &extpkt, | |
2641 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET, &exts, | |
2642 | NULL, 1) | |
fe874d27 MC |
2643 | || !tls_parse_all_extensions(s, |
2644 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET, | |
f63a17d6 MC |
2645 | exts, NULL, 0, 1)) { |
2646 | /* SSLfatal() already called */ | |
2647 | goto err; | |
de1df7e9 MC |
2648 | } |
2649 | } | |
2650 | ||
0f113f3e MC |
2651 | /* |
2652 | * There are two ways to detect a resumed ticket session. One is to set | |
2653 | * an appropriate session ID and then the server must return a match in | |
2654 | * ServerHello. This allows the normal client session ID matching to work | |
2655 | * and we know much earlier that the ticket has been accepted. The | |
2656 | * other way is to set zero length session ID when the ticket is | |
2657 | * presented and rely on the handshake to determine session resumption. | |
2658 | * We choose the former approach because this fits in with assumptions | |
abd86cec MC |
2659 | * elsewhere in OpenSSL. The session ID is set to the SHA256 hash of the |
2660 | * ticket. | |
0f113f3e | 2661 | */ |
38b051a1 | 2662 | sha256 = EVP_MD_fetch(sctx->libctx, "SHA2-256", sctx->propq); |
abd86cec | 2663 | if (sha256 == NULL) { |
5a2d0ef3 RL |
2664 | /* Error is already recorded */ |
2665 | SSLfatal_alert(s, SSL_AD_INTERNAL_ERROR); | |
abd86cec MC |
2666 | goto err; |
2667 | } | |
ec60ccc1 | 2668 | /* |
407820c0 | 2669 | * We use sess_len here because EVP_Digest expects an int |
ec60ccc1 MC |
2670 | * but s->session->session_id_length is a size_t |
2671 | */ | |
aff8c126 | 2672 | if (!EVP_Digest(s->session->ext.tick, ticklen, |
ec60ccc1 | 2673 | s->session->session_id, &sess_len, |
abd86cec | 2674 | sha256, NULL)) { |
c48ffbcc | 2675 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
d166ed8c DSH |
2676 | goto err; |
2677 | } | |
abd86cec MC |
2678 | EVP_MD_free(sha256); |
2679 | sha256 = NULL; | |
ec60ccc1 | 2680 | s->session->session_id_length = sess_len; |
4cb00457 | 2681 | s->session->not_resumable = 0; |
de1df7e9 MC |
2682 | |
2683 | /* This is a standalone message in TLSv1.3, so there is no more to read */ | |
38b051a1 | 2684 | if (SSL_CONNECTION_IS_TLS13(s)) { |
4ff1a526 | 2685 | const EVP_MD *md = ssl_handshake_md(s); |
ed576acd | 2686 | int hashleni = EVP_MD_get_size(md); |
4ff1a526 MC |
2687 | size_t hashlen; |
2688 | static const unsigned char nonce_label[] = "resumption"; | |
2689 | ||
2690 | /* Ensure cast to size_t is safe */ | |
2691 | if (!ossl_assert(hashleni >= 0)) { | |
c48ffbcc | 2692 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
4ff1a526 MC |
2693 | goto err; |
2694 | } | |
2695 | hashlen = (size_t)hashleni; | |
2696 | ||
2697 | if (!tls13_hkdf_expand(s, md, s->resumption_master_secret, | |
2698 | nonce_label, | |
2699 | sizeof(nonce_label) - 1, | |
6cf2dbd9 MC |
2700 | PACKET_data(&nonce), |
2701 | PACKET_remaining(&nonce), | |
4ff1a526 | 2702 | s->session->master_key, |
0fb2815b | 2703 | hashlen, 1)) { |
4ff1a526 MC |
2704 | /* SSLfatal() already called */ |
2705 | goto err; | |
2706 | } | |
2707 | s->session->master_key_length = hashlen; | |
2708 | ||
33d93417 | 2709 | OPENSSL_free(exts); |
de1df7e9 MC |
2710 | ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); |
2711 | return MSG_PROCESS_FINISHED_READING; | |
2712 | } | |
2713 | ||
b9908bf9 | 2714 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2715 | err: |
abd86cec | 2716 | EVP_MD_free(sha256); |
33d93417 | 2717 | OPENSSL_free(exts); |
b9908bf9 | 2718 | return MSG_PROCESS_ERROR; |
0f113f3e | 2719 | } |
67c8e7f4 | 2720 | |
f63e4288 MC |
2721 | /* |
2722 | * In TLSv1.3 this is called from the extensions code, otherwise it is used to | |
f63a17d6 | 2723 | * parse a separate message. Returns 1 on success or 0 on failure |
f63e4288 | 2724 | */ |
38b051a1 | 2725 | int tls_process_cert_status_body(SSL_CONNECTION *s, PACKET *pkt) |
b9908bf9 | 2726 | { |
8b0e934a | 2727 | size_t resplen; |
b9908bf9 | 2728 | unsigned int type; |
b9908bf9 | 2729 | |
73999b62 | 2730 | if (!PACKET_get_1(pkt, &type) |
a230b26e | 2731 | || type != TLSEXT_STATUSTYPE_ocsp) { |
c48ffbcc | 2732 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_UNSUPPORTED_STATUS_TYPE); |
f63e4288 | 2733 | return 0; |
0f113f3e | 2734 | } |
56a26ce3 MC |
2735 | if (!PACKET_get_net_3_len(pkt, &resplen) |
2736 | || PACKET_remaining(pkt) != resplen) { | |
c48ffbcc | 2737 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63e4288 | 2738 | return 0; |
0f113f3e | 2739 | } |
8cbfcc70 RS |
2740 | s->ext.ocsp.resp = OPENSSL_malloc(resplen); |
2741 | if (s->ext.ocsp.resp == NULL) { | |
39a14059 | 2742 | s->ext.ocsp.resp_len = 0; |
e077455e | 2743 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
f63e4288 | 2744 | return 0; |
0f113f3e | 2745 | } |
39a14059 | 2746 | s->ext.ocsp.resp_len = resplen; |
8cbfcc70 | 2747 | if (!PACKET_copy_bytes(pkt, s->ext.ocsp.resp, resplen)) { |
c48ffbcc | 2748 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63e4288 | 2749 | return 0; |
ac63710a | 2750 | } |
f63e4288 MC |
2751 | |
2752 | return 1; | |
2753 | } | |
2faa1b48 | 2754 | |
f63e4288 | 2755 | |
38b051a1 | 2756 | MSG_PROCESS_RETURN tls_process_cert_status(SSL_CONNECTION *s, PACKET *pkt) |
f63e4288 | 2757 | { |
f63a17d6 MC |
2758 | if (!tls_process_cert_status_body(s, pkt)) { |
2759 | /* SSLfatal() already called */ | |
f63e4288 MC |
2760 | return MSG_PROCESS_ERROR; |
2761 | } | |
2762 | ||
b9908bf9 | 2763 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2764 | } |
d02b48c6 | 2765 | |
7776a36c MC |
2766 | /* |
2767 | * Perform miscellaneous checks and processing after we have received the | |
2768 | * server's initial flight. In TLS1.3 this is after the Server Finished message. | |
6530c490 MC |
2769 | * In <=TLS1.2 this is after the ServerDone message. Returns 1 on success or 0 |
2770 | * on failure. | |
7776a36c | 2771 | */ |
38b051a1 | 2772 | int tls_process_initial_server_flight(SSL_CONNECTION *s) |
b9908bf9 | 2773 | { |
38b051a1 TM |
2774 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
2775 | ||
a455d0f6 MC |
2776 | /* |
2777 | * at this point we check that we have the required stuff from | |
2778 | * the server | |
2779 | */ | |
2780 | if (!ssl3_check_cert_and_algorithm(s)) { | |
f63a17d6 | 2781 | /* SSLfatal() already called */ |
7776a36c | 2782 | return 0; |
a455d0f6 MC |
2783 | } |
2784 | ||
bb1aaab4 | 2785 | /* |
aff8c126 RS |
2786 | * Call the ocsp status callback if needed. The |ext.ocsp.resp| and |
2787 | * |ext.ocsp.resp_len| values will be set if we actually received a status | |
bb1aaab4 MC |
2788 | * message, or NULL and -1 otherwise |
2789 | */ | |
aff8c126 | 2790 | if (s->ext.status_type != TLSEXT_STATUSTYPE_nothing |
38b051a1 TM |
2791 | && sctx->ext.status_cb != NULL) { |
2792 | int ret = sctx->ext.status_cb(SSL_CONNECTION_GET_SSL(s), | |
2793 | sctx->ext.status_arg); | |
aff8c126 | 2794 | |
bb1aaab4 | 2795 | if (ret == 0) { |
f63a17d6 | 2796 | SSLfatal(s, SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE, |
f63a17d6 | 2797 | SSL_R_INVALID_STATUS_RESPONSE); |
7776a36c | 2798 | return 0; |
bb1aaab4 MC |
2799 | } |
2800 | if (ret < 0) { | |
c0f4400c DB |
2801 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2802 | SSL_R_OCSP_CALLBACK_FAILURE); | |
7776a36c | 2803 | return 0; |
bb1aaab4 MC |
2804 | } |
2805 | } | |
ed29e82a RP |
2806 | #ifndef OPENSSL_NO_CT |
2807 | if (s->ct_validation_callback != NULL) { | |
43341433 VD |
2808 | /* Note we validate the SCTs whether or not we abort on error */ |
2809 | if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) { | |
f63a17d6 | 2810 | /* SSLfatal() already called */ |
7776a36c | 2811 | return 0; |
ed29e82a RP |
2812 | } |
2813 | } | |
2814 | #endif | |
2815 | ||
7776a36c MC |
2816 | return 1; |
2817 | } | |
2818 | ||
38b051a1 | 2819 | MSG_PROCESS_RETURN tls_process_server_done(SSL_CONNECTION *s, PACKET *pkt) |
7776a36c | 2820 | { |
7776a36c MC |
2821 | if (PACKET_remaining(pkt) > 0) { |
2822 | /* should contain no data */ | |
c48ffbcc | 2823 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2824 | return MSG_PROCESS_ERROR; |
7776a36c MC |
2825 | } |
2826 | #ifndef OPENSSL_NO_SRP | |
555cbb32 | 2827 | if (s->s3.tmp.new_cipher->algorithm_mkey & SSL_kSRP) { |
76cb077f | 2828 | if (ssl_srp_calc_a_param_intern(s) <= 0) { |
c48ffbcc | 2829 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_SRP_A_CALC); |
f63a17d6 | 2830 | return MSG_PROCESS_ERROR; |
7776a36c MC |
2831 | } |
2832 | } | |
2833 | #endif | |
2834 | ||
f63a17d6 MC |
2835 | if (!tls_process_initial_server_flight(s)) { |
2836 | /* SSLfatal() already called */ | |
2837 | return MSG_PROCESS_ERROR; | |
2838 | } | |
7776a36c | 2839 | |
bd79bcb4 | 2840 | return MSG_PROCESS_FINISHED_READING; |
0f113f3e | 2841 | } |
176f31dd | 2842 | |
38b051a1 | 2843 | static int tls_construct_cke_psk_preamble(SSL_CONNECTION *s, WPACKET *pkt) |
0f113f3e | 2844 | { |
7689082b | 2845 | #ifndef OPENSSL_NO_PSK |
13c0ec4a MC |
2846 | int ret = 0; |
2847 | /* | |
2848 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
2849 | * \0-terminated identity. The last byte is for us for simulating | |
2850 | * strnlen. | |
2851 | */ | |
2852 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
2853 | size_t identitylen = 0; | |
2854 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
2855 | unsigned char *tmppsk = NULL; | |
2856 | char *tmpidentity = NULL; | |
2857 | size_t psklen = 0; | |
2858 | ||
2859 | if (s->psk_client_callback == NULL) { | |
c48ffbcc | 2860 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_PSK_NO_CLIENT_CB); |
13c0ec4a MC |
2861 | goto err; |
2862 | } | |
d02b48c6 | 2863 | |
13c0ec4a | 2864 | memset(identity, 0, sizeof(identity)); |
d02b48c6 | 2865 | |
38b051a1 TM |
2866 | psklen = s->psk_client_callback(SSL_CONNECTION_GET_SSL(s), |
2867 | s->session->psk_identity_hint, | |
13c0ec4a MC |
2868 | identity, sizeof(identity) - 1, |
2869 | psk, sizeof(psk)); | |
7689082b | 2870 | |
13c0ec4a | 2871 | if (psklen > PSK_MAX_PSK_LEN) { |
c48ffbcc | 2872 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, ERR_R_INTERNAL_ERROR); |
3de7f014 | 2873 | psklen = PSK_MAX_PSK_LEN; /* Avoid overrunning the array on cleanse */ |
13c0ec4a MC |
2874 | goto err; |
2875 | } else if (psklen == 0) { | |
c48ffbcc | 2876 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_PSK_IDENTITY_NOT_FOUND); |
13c0ec4a MC |
2877 | goto err; |
2878 | } | |
7689082b | 2879 | |
13c0ec4a MC |
2880 | identitylen = strlen(identity); |
2881 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
c48ffbcc | 2882 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2883 | goto err; |
2884 | } | |
7689082b | 2885 | |
13c0ec4a MC |
2886 | tmppsk = OPENSSL_memdup(psk, psklen); |
2887 | tmpidentity = OPENSSL_strdup(identity); | |
2888 | if (tmppsk == NULL || tmpidentity == NULL) { | |
e077455e | 2889 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
13c0ec4a MC |
2890 | goto err; |
2891 | } | |
7689082b | 2892 | |
555cbb32 TS |
2893 | OPENSSL_free(s->s3.tmp.psk); |
2894 | s->s3.tmp.psk = tmppsk; | |
2895 | s->s3.tmp.psklen = psklen; | |
13c0ec4a MC |
2896 | tmppsk = NULL; |
2897 | OPENSSL_free(s->session->psk_identity); | |
2898 | s->session->psk_identity = tmpidentity; | |
2899 | tmpidentity = NULL; | |
f1ec23c0 | 2900 | |
b2b3024e | 2901 | if (!WPACKET_sub_memcpy_u16(pkt, identity, identitylen)) { |
c48ffbcc | 2902 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 MC |
2903 | goto err; |
2904 | } | |
7689082b | 2905 | |
13c0ec4a | 2906 | ret = 1; |
0bce0b02 | 2907 | |
13c0ec4a MC |
2908 | err: |
2909 | OPENSSL_cleanse(psk, psklen); | |
2910 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2911 | OPENSSL_clear_free(tmppsk, psklen); | |
2912 | OPENSSL_clear_free(tmpidentity, identitylen); | |
d02b48c6 | 2913 | |
13c0ec4a MC |
2914 | return ret; |
2915 | #else | |
c48ffbcc | 2916 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
13c0ec4a | 2917 | return 0; |
b9908bf9 | 2918 | #endif |
13c0ec4a | 2919 | } |
b9908bf9 | 2920 | |
38b051a1 | 2921 | static int tls_construct_cke_rsa(SSL_CONNECTION *s, WPACKET *pkt) |
13c0ec4a | 2922 | { |
f1ec23c0 | 2923 | unsigned char *encdata = NULL; |
13c0ec4a MC |
2924 | EVP_PKEY *pkey = NULL; |
2925 | EVP_PKEY_CTX *pctx = NULL; | |
2926 | size_t enclen; | |
2927 | unsigned char *pms = NULL; | |
2928 | size_t pmslen = 0; | |
38b051a1 | 2929 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
b9908bf9 | 2930 | |
13c0ec4a MC |
2931 | if (s->session->peer == NULL) { |
2932 | /* | |
2933 | * We should always have a server certificate with SSL_kRSA. | |
2934 | */ | |
c48ffbcc | 2935 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2936 | return 0; |
2937 | } | |
0f113f3e | 2938 | |
13c0ec4a | 2939 | pkey = X509_get0_pubkey(s->session->peer); |
d7e498ac | 2940 | if (!EVP_PKEY_is_a(pkey, "RSA")) { |
c48ffbcc | 2941 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
2942 | return 0; |
2943 | } | |
0f113f3e | 2944 | |
13c0ec4a MC |
2945 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; |
2946 | pms = OPENSSL_malloc(pmslen); | |
2947 | if (pms == NULL) { | |
e077455e | 2948 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
13c0ec4a MC |
2949 | return 0; |
2950 | } | |
0bce0b02 | 2951 | |
13c0ec4a MC |
2952 | pms[0] = s->client_version >> 8; |
2953 | pms[1] = s->client_version & 0xff; | |
38b051a1 | 2954 | if (RAND_bytes_ex(sctx->libctx, pms + 2, pmslen - 2, 0) <= 0) { |
e077455e | 2955 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_RAND_LIB); |
13c0ec4a MC |
2956 | goto err; |
2957 | } | |
0f113f3e | 2958 | |
13c0ec4a | 2959 | /* Fix buf for TLS and beyond */ |
f1ec23c0 | 2960 | if (s->version > SSL3_VERSION && !WPACKET_start_sub_packet_u16(pkt)) { |
c48ffbcc | 2961 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 MC |
2962 | goto err; |
2963 | } | |
3aceb9ec | 2964 | |
38b051a1 | 2965 | pctx = EVP_PKEY_CTX_new_from_pkey(sctx->libctx, pkey, sctx->propq); |
13c0ec4a MC |
2966 | if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0 |
2967 | || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) { | |
c48ffbcc | 2968 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
13c0ec4a MC |
2969 | goto err; |
2970 | } | |
f1ec23c0 MC |
2971 | if (!WPACKET_allocate_bytes(pkt, enclen, &encdata) |
2972 | || EVP_PKEY_encrypt(pctx, encdata, &enclen, pms, pmslen) <= 0) { | |
c48ffbcc | 2973 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_RSA_ENCRYPT); |
13c0ec4a MC |
2974 | goto err; |
2975 | } | |
13c0ec4a MC |
2976 | EVP_PKEY_CTX_free(pctx); |
2977 | pctx = NULL; | |
0f113f3e | 2978 | |
13c0ec4a | 2979 | /* Fix buf for TLS and beyond */ |
f1ec23c0 | 2980 | if (s->version > SSL3_VERSION && !WPACKET_close(pkt)) { |
c48ffbcc | 2981 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 | 2982 | goto err; |
b9908bf9 | 2983 | } |
13c0ec4a | 2984 | |
2faa1b48 | 2985 | /* Log the premaster secret, if logging is enabled. */ |
a2c2e000 MC |
2986 | if (!ssl_log_rsa_client_key_exchange(s, encdata, enclen, pms, pmslen)) { |
2987 | /* SSLfatal() already called */ | |
2faa1b48 | 2988 | goto err; |
a2c2e000 | 2989 | } |
2faa1b48 | 2990 | |
555cbb32 TS |
2991 | s->s3.tmp.pms = pms; |
2992 | s->s3.tmp.pmslen = pmslen; | |
26fb4b03 | 2993 | |
13c0ec4a MC |
2994 | return 1; |
2995 | err: | |
2996 | OPENSSL_clear_free(pms, pmslen); | |
2997 | EVP_PKEY_CTX_free(pctx); | |
2998 | ||
2999 | return 0; | |
13c0ec4a MC |
3000 | } |
3001 | ||
38b051a1 | 3002 | static int tls_construct_cke_dhe(SSL_CONNECTION *s, WPACKET *pkt) |
a8c1c704 | 3003 | { |
a8c1c704 | 3004 | EVP_PKEY *ckey = NULL, *skey = NULL; |
f1ec23c0 | 3005 | unsigned char *keybytes = NULL; |
807b0a1d | 3006 | int prime_len; |
cb5a427a MC |
3007 | unsigned char *encoded_pub = NULL; |
3008 | size_t encoded_pub_len, pad_len; | |
3009 | int ret = 0; | |
a8c1c704 | 3010 | |
555cbb32 | 3011 | skey = s->s3.peer_tmp; |
a2c2e000 | 3012 | if (skey == NULL) { |
c48ffbcc | 3013 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 | 3014 | goto err; |
a2c2e000 | 3015 | } |
f1ec23c0 | 3016 | |
0f00ed77 | 3017 | ckey = ssl_generate_pkey(s, skey); |
a2c2e000 | 3018 | if (ckey == NULL) { |
c48ffbcc | 3019 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b599ce3b | 3020 | goto err; |
a2c2e000 | 3021 | } |
b599ce3b | 3022 | |
a2c2e000 MC |
3023 | if (ssl_derive(s, ckey, skey, 0) == 0) { |
3024 | /* SSLfatal() already called */ | |
f1ec23c0 | 3025 | goto err; |
a2c2e000 | 3026 | } |
a8c1c704 MC |
3027 | |
3028 | /* send off the data */ | |
cb5a427a MC |
3029 | |
3030 | /* Generate encoding of server key */ | |
3031 | encoded_pub_len = EVP_PKEY_get1_encoded_public_key(ckey, &encoded_pub); | |
3032 | if (encoded_pub_len == 0) { | |
3033 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
10481d33 | 3034 | EVP_PKEY_free(ckey); |
cb5a427a MC |
3035 | return EXT_RETURN_FAIL; |
3036 | } | |
3037 | ||
807b0a1d FM |
3038 | /* |
3039 | * For interoperability with some versions of the Microsoft TLS | |
3040 | * stack, we need to zero pad the DHE pub key to the same length | |
cb5a427a | 3041 | * as the prime. |
807b0a1d | 3042 | */ |
ed576acd | 3043 | prime_len = EVP_PKEY_get_size(ckey); |
cb5a427a MC |
3044 | pad_len = prime_len - encoded_pub_len; |
3045 | if (pad_len > 0) { | |
3046 | if (!WPACKET_sub_allocate_bytes_u16(pkt, pad_len, &keybytes)) { | |
3047 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
3048 | goto err; | |
3049 | } | |
3050 | memset(keybytes, 0, pad_len); | |
3051 | } | |
3052 | ||
3053 | if (!WPACKET_sub_memcpy_u16(pkt, encoded_pub, encoded_pub_len)) { | |
c48ffbcc | 3054 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 | 3055 | goto err; |
a2c2e000 | 3056 | } |
f1ec23c0 | 3057 | |
cb5a427a | 3058 | ret = 1; |
f1ec23c0 | 3059 | err: |
cb5a427a | 3060 | OPENSSL_free(encoded_pub); |
f1ec23c0 | 3061 | EVP_PKEY_free(ckey); |
cb5a427a | 3062 | return ret; |
a8c1c704 MC |
3063 | } |
3064 | ||
38b051a1 | 3065 | static int tls_construct_cke_ecdhe(SSL_CONNECTION *s, WPACKET *pkt) |
67ad5aab | 3066 | { |
67ad5aab | 3067 | unsigned char *encodedPoint = NULL; |
348240c6 | 3068 | size_t encoded_pt_len = 0; |
67ad5aab | 3069 | EVP_PKEY *ckey = NULL, *skey = NULL; |
f1ec23c0 | 3070 | int ret = 0; |
67ad5aab | 3071 | |
555cbb32 | 3072 | skey = s->s3.peer_tmp; |
ec24630a | 3073 | if (skey == NULL) { |
c48ffbcc | 3074 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
3075 | return 0; |
3076 | } | |
3077 | ||
0f00ed77 | 3078 | ckey = ssl_generate_pkey(s, skey); |
b599ce3b | 3079 | if (ckey == NULL) { |
e077455e | 3080 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_SSL_LIB); |
b599ce3b MC |
3081 | goto err; |
3082 | } | |
67ad5aab | 3083 | |
0f1e51ea | 3084 | if (ssl_derive(s, ckey, skey, 0) == 0) { |
a2c2e000 | 3085 | /* SSLfatal() already called */ |
67ad5aab MC |
3086 | goto err; |
3087 | } | |
3088 | ||
3089 | /* Generate encoding of client key */ | |
5ac8fb58 | 3090 | encoded_pt_len = EVP_PKEY_get1_encoded_public_key(ckey, &encodedPoint); |
67ad5aab MC |
3091 | |
3092 | if (encoded_pt_len == 0) { | |
c48ffbcc | 3093 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EC_LIB); |
67ad5aab MC |
3094 | goto err; |
3095 | } | |
3096 | ||
b2b3024e | 3097 | if (!WPACKET_sub_memcpy_u8(pkt, encodedPoint, encoded_pt_len)) { |
c48ffbcc | 3098 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 MC |
3099 | goto err; |
3100 | } | |
67ad5aab | 3101 | |
f1ec23c0 | 3102 | ret = 1; |
67ad5aab | 3103 | err: |
f1ec23c0 | 3104 | OPENSSL_free(encodedPoint); |
67ad5aab | 3105 | EVP_PKEY_free(ckey); |
f1ec23c0 | 3106 | return ret; |
67ad5aab MC |
3107 | } |
3108 | ||
38b051a1 | 3109 | static int tls_construct_cke_gost(SSL_CONNECTION *s, WPACKET *pkt) |
e00e0b3d MC |
3110 | { |
3111 | #ifndef OPENSSL_NO_GOST | |
3112 | /* GOST key exchange message creation */ | |
3113 | EVP_PKEY_CTX *pkey_ctx = NULL; | |
3114 | X509 *peer_cert; | |
3115 | size_t msglen; | |
3116 | unsigned int md_len; | |
3117 | unsigned char shared_ukm[32], tmp[256]; | |
3118 | EVP_MD_CTX *ukm_hash = NULL; | |
3119 | int dgst_nid = NID_id_GostR3411_94; | |
3120 | unsigned char *pms = NULL; | |
3121 | size_t pmslen = 0; | |
38b051a1 | 3122 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
e00e0b3d | 3123 | |
555cbb32 | 3124 | if ((s->s3.tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0) |
e00e0b3d MC |
3125 | dgst_nid = NID_id_GostR3411_2012_256; |
3126 | ||
3127 | /* | |
1ee4b98e | 3128 | * Get server certificate PKEY and create ctx from it |
e00e0b3d MC |
3129 | */ |
3130 | peer_cert = s->session->peer; | |
12a765a5 | 3131 | if (peer_cert == NULL) { |
c48ffbcc RL |
3132 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
3133 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); | |
e00e0b3d MC |
3134 | return 0; |
3135 | } | |
3136 | ||
38b051a1 | 3137 | pkey_ctx = EVP_PKEY_CTX_new_from_pkey(sctx->libctx, |
0f00ed77 | 3138 | X509_get0_pubkey(peer_cert), |
38b051a1 | 3139 | sctx->propq); |
e00e0b3d | 3140 | if (pkey_ctx == NULL) { |
e077455e | 3141 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
e00e0b3d MC |
3142 | return 0; |
3143 | } | |
3144 | /* | |
3145 | * If we have send a certificate, and certificate key | |
3146 | * parameters match those of server certificate, use | |
3147 | * certificate key for key exchange | |
3148 | */ | |
3149 | ||
3150 | /* Otherwise, generate ephemeral key pair */ | |
3151 | pmslen = 32; | |
3152 | pms = OPENSSL_malloc(pmslen); | |
3153 | if (pms == NULL) { | |
e077455e | 3154 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
2f3930bc | 3155 | goto err; |
e00e0b3d MC |
3156 | } |
3157 | ||
3158 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0 | |
348240c6 | 3159 | /* Generate session key |
348240c6 | 3160 | */ |
38b051a1 | 3161 | || RAND_bytes_ex(sctx->libctx, pms, pmslen, 0) <= 0) { |
c48ffbcc | 3162 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
3163 | goto err; |
3164 | }; | |
e00e0b3d MC |
3165 | /* |
3166 | * Compute shared IV and store it in algorithm-specific context | |
3167 | * data | |
3168 | */ | |
3169 | ukm_hash = EVP_MD_CTX_new(); | |
3170 | if (ukm_hash == NULL | |
a230b26e | 3171 | || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0 |
555cbb32 | 3172 | || EVP_DigestUpdate(ukm_hash, s->s3.client_random, |
a230b26e | 3173 | SSL3_RANDOM_SIZE) <= 0 |
555cbb32 | 3174 | || EVP_DigestUpdate(ukm_hash, s->s3.server_random, |
a230b26e EK |
3175 | SSL3_RANDOM_SIZE) <= 0 |
3176 | || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) { | |
c48ffbcc | 3177 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
3178 | goto err; |
3179 | } | |
3180 | EVP_MD_CTX_free(ukm_hash); | |
3181 | ukm_hash = NULL; | |
3182 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
7b1264ba | 3183 | EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) <= 0) { |
c48ffbcc | 3184 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
3185 | goto err; |
3186 | } | |
3187 | /* Make GOST keytransport blob message */ | |
3188 | /* | |
3189 | * Encapsulate it into sequence | |
3190 | */ | |
e00e0b3d MC |
3191 | msglen = 255; |
3192 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) { | |
c48ffbcc | 3193 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
3194 | goto err; |
3195 | } | |
f1ec23c0 | 3196 | |
08029dfa MC |
3197 | if (!WPACKET_put_bytes_u8(pkt, V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED) |
3198 | || (msglen >= 0x80 && !WPACKET_put_bytes_u8(pkt, 0x81)) | |
b2b3024e | 3199 | || !WPACKET_sub_memcpy_u8(pkt, tmp, msglen)) { |
c48ffbcc | 3200 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 | 3201 | goto err; |
e00e0b3d | 3202 | } |
f1ec23c0 | 3203 | |
e00e0b3d | 3204 | EVP_PKEY_CTX_free(pkey_ctx); |
555cbb32 TS |
3205 | s->s3.tmp.pms = pms; |
3206 | s->s3.tmp.pmslen = pmslen; | |
e00e0b3d MC |
3207 | |
3208 | return 1; | |
3209 | err: | |
3210 | EVP_PKEY_CTX_free(pkey_ctx); | |
3211 | OPENSSL_clear_free(pms, pmslen); | |
3212 | EVP_MD_CTX_free(ukm_hash); | |
3213 | return 0; | |
3214 | #else | |
c48ffbcc | 3215 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
3216 | return 0; |
3217 | #endif | |
3218 | } | |
3219 | ||
5a5530a2 | 3220 | #ifndef OPENSSL_NO_GOST |
38b051a1 | 3221 | int ossl_gost18_cke_cipher_nid(const SSL_CONNECTION *s) |
5a5530a2 DB |
3222 | { |
3223 | if ((s->s3.tmp.new_cipher->algorithm_enc & SSL_MAGMA) != 0) | |
3224 | return NID_magma_ctr; | |
3225 | else if ((s->s3.tmp.new_cipher->algorithm_enc & SSL_KUZNYECHIK) != 0) | |
3226 | return NID_kuznyechik_ctr; | |
3227 | ||
3228 | return NID_undef; | |
3229 | } | |
3230 | ||
38b051a1 | 3231 | int ossl_gost_ukm(const SSL_CONNECTION *s, unsigned char *dgst_buf) |
5a5530a2 DB |
3232 | { |
3233 | EVP_MD_CTX * hash = NULL; | |
3234 | unsigned int md_len; | |
38b051a1 TM |
3235 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
3236 | const EVP_MD *md = ssl_evp_md_fetch(sctx->libctx, NID_id_GostR3411_2012_256, | |
3237 | sctx->propq); | |
5a5530a2 DB |
3238 | |
3239 | if (md == NULL) | |
3240 | return 0; | |
3241 | ||
3242 | if ((hash = EVP_MD_CTX_new()) == NULL | |
3243 | || EVP_DigestInit(hash, md) <= 0 | |
3244 | || EVP_DigestUpdate(hash, s->s3.client_random, SSL3_RANDOM_SIZE) <= 0 | |
3245 | || EVP_DigestUpdate(hash, s->s3.server_random, SSL3_RANDOM_SIZE) <= 0 | |
3246 | || EVP_DigestFinal_ex(hash, dgst_buf, &md_len) <= 0) { | |
3247 | EVP_MD_CTX_free(hash); | |
3248 | ssl_evp_md_free(md); | |
3249 | return 0; | |
3250 | } | |
3251 | ||
3252 | EVP_MD_CTX_free(hash); | |
3253 | ssl_evp_md_free(md); | |
3254 | return 1; | |
3255 | } | |
3256 | #endif | |
3257 | ||
38b051a1 | 3258 | static int tls_construct_cke_gost18(SSL_CONNECTION *s, WPACKET *pkt) |
5a5530a2 DB |
3259 | { |
3260 | #ifndef OPENSSL_NO_GOST | |
3261 | /* GOST 2018 key exchange message creation */ | |
2b5e8999 DB |
3262 | unsigned char rnd_dgst[32]; |
3263 | unsigned char *encdata = NULL; | |
5a5530a2 DB |
3264 | EVP_PKEY_CTX *pkey_ctx = NULL; |
3265 | X509 *peer_cert; | |
3266 | unsigned char *pms = NULL; | |
3267 | size_t pmslen = 0; | |
3268 | size_t msglen; | |
6dd4b77a | 3269 | int cipher_nid = ossl_gost18_cke_cipher_nid(s); |
38b051a1 | 3270 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
5a5530a2 DB |
3271 | |
3272 | if (cipher_nid == NID_undef) { | |
c48ffbcc | 3273 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
5a5530a2 DB |
3274 | return 0; |
3275 | } | |
3276 | ||
6dd4b77a | 3277 | if (ossl_gost_ukm(s, rnd_dgst) <= 0) { |
c48ffbcc | 3278 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
5a5530a2 DB |
3279 | goto err; |
3280 | } | |
3281 | ||
3282 | /* Pre-master secret - random bytes */ | |
3283 | pmslen = 32; | |
3284 | pms = OPENSSL_malloc(pmslen); | |
3285 | if (pms == NULL) { | |
e077455e | 3286 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
5a5530a2 DB |
3287 | goto err; |
3288 | } | |
3289 | ||
38b051a1 | 3290 | if (RAND_bytes_ex(sctx->libctx, pms, pmslen, 0) <= 0) { |
c48ffbcc | 3291 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
5a5530a2 DB |
3292 | goto err; |
3293 | } | |
3294 | ||
3295 | /* Get server certificate PKEY and create ctx from it */ | |
3296 | peer_cert = s->session->peer; | |
3297 | if (peer_cert == NULL) { | |
c48ffbcc RL |
3298 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
3299 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); | |
1b87116a | 3300 | goto err; |
5a5530a2 DB |
3301 | } |
3302 | ||
38b051a1 | 3303 | pkey_ctx = EVP_PKEY_CTX_new_from_pkey(sctx->libctx, |
c48ffbcc | 3304 | X509_get0_pubkey(peer_cert), |
38b051a1 | 3305 | sctx->propq); |
5a5530a2 | 3306 | if (pkey_ctx == NULL) { |
e077455e | 3307 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
1b87116a | 3308 | goto err; |
5a5530a2 DB |
3309 | } |
3310 | ||
1287dabd | 3311 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0) { |
c48ffbcc | 3312 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
5a5530a2 DB |
3313 | goto err; |
3314 | }; | |
3315 | ||
3316 | /* Reuse EVP_PKEY_CTRL_SET_IV, make choice in engine code */ | |
3317 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
7b1264ba | 3318 | EVP_PKEY_CTRL_SET_IV, 32, rnd_dgst) <= 0) { |
c48ffbcc | 3319 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_LIBRARY_BUG); |
5a5530a2 DB |
3320 | goto err; |
3321 | } | |
3322 | ||
3323 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
7b1264ba | 3324 | EVP_PKEY_CTRL_CIPHER, cipher_nid, NULL) <= 0) { |
c48ffbcc | 3325 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_LIBRARY_BUG); |
5a5530a2 DB |
3326 | goto err; |
3327 | } | |
3328 | ||
2b5e8999 DB |
3329 | if (EVP_PKEY_encrypt(pkey_ctx, NULL, &msglen, pms, pmslen) <= 0) { |
3330 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); | |
5a5530a2 DB |
3331 | goto err; |
3332 | } | |
3333 | ||
2b5e8999 DB |
3334 | if (!WPACKET_allocate_bytes(pkt, msglen, &encdata) |
3335 | || EVP_PKEY_encrypt(pkey_ctx, encdata, &msglen, pms, pmslen) <= 0) { | |
3336 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); | |
5a5530a2 DB |
3337 | goto err; |
3338 | } | |
3339 | ||
3340 | EVP_PKEY_CTX_free(pkey_ctx); | |
2b5e8999 | 3341 | pkey_ctx = NULL; |
5a5530a2 DB |
3342 | s->s3.tmp.pms = pms; |
3343 | s->s3.tmp.pmslen = pmslen; | |
3344 | ||
3345 | return 1; | |
3346 | err: | |
3347 | EVP_PKEY_CTX_free(pkey_ctx); | |
3348 | OPENSSL_clear_free(pms, pmslen); | |
3349 | return 0; | |
3350 | #else | |
c48ffbcc | 3351 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
5a5530a2 DB |
3352 | return 0; |
3353 | #endif | |
3354 | } | |
3355 | ||
38b051a1 | 3356 | static int tls_construct_cke_srp(SSL_CONNECTION *s, WPACKET *pkt) |
840a2bf8 | 3357 | { |
8b9546c7 | 3358 | #ifndef OPENSSL_NO_SRP |
f1ec23c0 MC |
3359 | unsigned char *abytes = NULL; |
3360 | ||
3361 | if (s->srp_ctx.A == NULL | |
b2b3024e MC |
3362 | || !WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(s->srp_ctx.A), |
3363 | &abytes)) { | |
c48ffbcc | 3364 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
3365 | return 0; |
3366 | } | |
f1ec23c0 MC |
3367 | BN_bn2bin(s->srp_ctx.A, abytes); |
3368 | ||
840a2bf8 MC |
3369 | OPENSSL_free(s->session->srp_username); |
3370 | s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login); | |
3371 | if (s->session->srp_username == NULL) { | |
e077455e | 3372 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
840a2bf8 MC |
3373 | return 0; |
3374 | } | |
3375 | ||
3376 | return 1; | |
3377 | #else | |
c48ffbcc | 3378 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
3379 | return 0; |
3380 | #endif | |
3381 | } | |
3382 | ||
67ec6d2b MC |
3383 | CON_FUNC_RETURN tls_construct_client_key_exchange(SSL_CONNECTION *s, |
3384 | WPACKET *pkt) | |
13c0ec4a | 3385 | { |
13c0ec4a | 3386 | unsigned long alg_k; |
13c0ec4a | 3387 | |
555cbb32 | 3388 | alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
13c0ec4a | 3389 | |
a2c2e000 MC |
3390 | /* |
3391 | * All of the construct functions below call SSLfatal() if necessary so | |
3392 | * no need to do so here. | |
3393 | */ | |
13c0ec4a | 3394 | if ((alg_k & SSL_PSK) |
a2c2e000 | 3395 | && !tls_construct_cke_psk_preamble(s, pkt)) |
13c0ec4a MC |
3396 | goto err; |
3397 | ||
f1ec23c0 | 3398 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
a2c2e000 | 3399 | if (!tls_construct_cke_rsa(s, pkt)) |
13c0ec4a | 3400 | goto err; |
a8c1c704 | 3401 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
a2c2e000 | 3402 | if (!tls_construct_cke_dhe(s, pkt)) |
b9908bf9 | 3403 | goto err; |
67ad5aab | 3404 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
a2c2e000 | 3405 | if (!tls_construct_cke_ecdhe(s, pkt)) |
ce0c1f2b | 3406 | goto err; |
e00e0b3d | 3407 | } else if (alg_k & SSL_kGOST) { |
a2c2e000 | 3408 | if (!tls_construct_cke_gost(s, pkt)) |
a71edf3b | 3409 | goto err; |
5a5530a2 DB |
3410 | } else if (alg_k & SSL_kGOST18) { |
3411 | if (!tls_construct_cke_gost18(s, pkt)) | |
3412 | goto err; | |
840a2bf8 | 3413 | } else if (alg_k & SSL_kSRP) { |
a2c2e000 | 3414 | if (!tls_construct_cke_srp(s, pkt)) |
69f68237 | 3415 | goto err; |
4a424545 | 3416 | } else if (!(alg_k & SSL_kPSK)) { |
c48ffbcc | 3417 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b9908bf9 MC |
3418 | goto err; |
3419 | } | |
3420 | ||
67ec6d2b | 3421 | return CON_FUNC_SUCCESS; |
0f113f3e | 3422 | err: |
555cbb32 TS |
3423 | OPENSSL_clear_free(s->s3.tmp.pms, s->s3.tmp.pmslen); |
3424 | s->s3.tmp.pms = NULL; | |
39a14059 | 3425 | s->s3.tmp.pmslen = 0; |
7689082b | 3426 | #ifndef OPENSSL_NO_PSK |
555cbb32 TS |
3427 | OPENSSL_clear_free(s->s3.tmp.psk, s->s3.tmp.psklen); |
3428 | s->s3.tmp.psk = NULL; | |
39a14059 | 3429 | s->s3.tmp.psklen = 0; |
0f113f3e | 3430 | #endif |
67ec6d2b | 3431 | return CON_FUNC_ERROR; |
b9908bf9 MC |
3432 | } |
3433 | ||
38b051a1 | 3434 | int tls_client_key_exchange_post_work(SSL_CONNECTION *s) |
b9908bf9 MC |
3435 | { |
3436 | unsigned char *pms = NULL; | |
3437 | size_t pmslen = 0; | |
3438 | ||
555cbb32 TS |
3439 | pms = s->s3.tmp.pms; |
3440 | pmslen = s->s3.tmp.pmslen; | |
6f137370 | 3441 | |
b9908bf9 MC |
3442 | #ifndef OPENSSL_NO_SRP |
3443 | /* Check for SRP */ | |
555cbb32 | 3444 | if (s->s3.tmp.new_cipher->algorithm_mkey & SSL_kSRP) { |
b9908bf9 | 3445 | if (!srp_generate_client_master_secret(s)) { |
a2c2e000 | 3446 | /* SSLfatal() already called */ |
b9908bf9 MC |
3447 | goto err; |
3448 | } | |
3449 | return 1; | |
3450 | } | |
3451 | #endif | |
b9908bf9 | 3452 | |
555cbb32 | 3453 | if (pms == NULL && !(s->s3.tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { |
e077455e | 3454 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_PASSED_INVALID_ARGUMENT); |
b9908bf9 MC |
3455 | goto err; |
3456 | } | |
3457 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { | |
a2c2e000 | 3458 | /* SSLfatal() already called */ |
6f137370 MC |
3459 | /* ssl_generate_master_secret frees the pms even on error */ |
3460 | pms = NULL; | |
3461 | pmslen = 0; | |
b9908bf9 MC |
3462 | goto err; |
3463 | } | |
6f137370 MC |
3464 | pms = NULL; |
3465 | pmslen = 0; | |
473483d4 MC |
3466 | |
3467 | #ifndef OPENSSL_NO_SCTP | |
38b051a1 | 3468 | if (SSL_CONNECTION_IS_DTLS(s)) { |
473483d4 MC |
3469 | unsigned char sctpauthkey[64]; |
3470 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
09d62b33 | 3471 | size_t labellen; |
38b051a1 | 3472 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
473483d4 MC |
3473 | |
3474 | /* | |
3475 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP | |
3476 | * used. | |
3477 | */ | |
141eb8c6 MC |
3478 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
3479 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
473483d4 | 3480 | |
09d62b33 MT |
3481 | /* Don't include the terminating zero. */ |
3482 | labellen = sizeof(labelbuffer) - 1; | |
3483 | if (s->mode & SSL_MODE_DTLS_SCTP_LABEL_LENGTH_BUG) | |
3484 | labellen += 1; | |
3485 | ||
38b051a1 | 3486 | if (SSL_export_keying_material(ssl, sctpauthkey, |
a230b26e | 3487 | sizeof(sctpauthkey), labelbuffer, |
09d62b33 | 3488 | labellen, NULL, 0, 0) <= 0) { |
c48ffbcc | 3489 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
473483d4 | 3490 | goto err; |
a2c2e000 | 3491 | } |
473483d4 | 3492 | |
38b051a1 | 3493 | BIO_ctrl(SSL_get_wbio(ssl), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, |
473483d4 MC |
3494 | sizeof(sctpauthkey), sctpauthkey); |
3495 | } | |
3496 | #endif | |
3497 | ||
b9908bf9 MC |
3498 | return 1; |
3499 | err: | |
3500 | OPENSSL_clear_free(pms, pmslen); | |
555cbb32 | 3501 | s->s3.tmp.pms = NULL; |
39a14059 | 3502 | s->s3.tmp.pmslen = 0; |
b9908bf9 | 3503 | return 0; |
0f113f3e | 3504 | } |
d02b48c6 | 3505 | |
0f113f3e MC |
3506 | /* |
3507 | * Check a certificate can be used for client authentication. Currently check | |
3508 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
3509 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 | 3510 | */ |
38b051a1 | 3511 | static int ssl3_check_client_certificate(SSL_CONNECTION *s) |
0f113f3e | 3512 | { |
0f113f3e | 3513 | /* If no suitable signature algorithm can't use certificate */ |
555cbb32 | 3514 | if (!tls_choose_sigalg(s, 0) || s->s3.tmp.sigalg == NULL) |
0f113f3e MC |
3515 | return 0; |
3516 | /* | |
3517 | * If strict mode check suitability of chain before using it. This also | |
3518 | * adjusts suite B digest if necessary. | |
3519 | */ | |
3520 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
3521 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
3522 | return 0; | |
0f113f3e MC |
3523 | return 1; |
3524 | } | |
0d609395 | 3525 | |
38b051a1 | 3526 | WORK_STATE tls_prepare_client_certificate(SSL_CONNECTION *s, WORK_STATE wst) |
0f113f3e MC |
3527 | { |
3528 | X509 *x509 = NULL; | |
3529 | EVP_PKEY *pkey = NULL; | |
3530 | int i; | |
38b051a1 | 3531 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
0f113f3e | 3532 | |
b9908bf9 | 3533 | if (wst == WORK_MORE_A) { |
0f113f3e MC |
3534 | /* Let cert callback update client certificates if required */ |
3535 | if (s->cert->cert_cb) { | |
38b051a1 | 3536 | i = s->cert->cert_cb(ssl, s->cert->cert_cb_arg); |
0f113f3e MC |
3537 | if (i < 0) { |
3538 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3539 | return WORK_MORE_A; |
0f113f3e MC |
3540 | } |
3541 | if (i == 0) { | |
c48ffbcc | 3542 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_CALLBACK_FAILED); |
eb5fd03b | 3543 | return WORK_ERROR; |
0f113f3e MC |
3544 | } |
3545 | s->rwstate = SSL_NOTHING; | |
3546 | } | |
9d75dce3 TS |
3547 | if (ssl3_check_client_certificate(s)) { |
3548 | if (s->post_handshake_auth == SSL_PHA_REQUESTED) { | |
3549 | return WORK_FINISHED_STOP; | |
3550 | } | |
b9908bf9 | 3551 | return WORK_FINISHED_CONTINUE; |
9d75dce3 | 3552 | } |
b9908bf9 MC |
3553 | |
3554 | /* Fall through to WORK_MORE_B */ | |
3555 | wst = WORK_MORE_B; | |
0f113f3e MC |
3556 | } |
3557 | ||
3558 | /* We need to get a client cert */ | |
b9908bf9 | 3559 | if (wst == WORK_MORE_B) { |
0f113f3e MC |
3560 | /* |
3561 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
3562 | * return(-1); We then get retied later | |
3563 | */ | |
0f113f3e MC |
3564 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
3565 | if (i < 0) { | |
3566 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3567 | return WORK_MORE_B; |
0f113f3e MC |
3568 | } |
3569 | s->rwstate = SSL_NOTHING; | |
3570 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
38b051a1 TM |
3571 | if (!SSL_use_certificate(ssl, x509) |
3572 | || !SSL_use_PrivateKey(ssl, pkey)) | |
0f113f3e MC |
3573 | i = 0; |
3574 | } else if (i == 1) { | |
3575 | i = 0; | |
6849b73c | 3576 | ERR_raise(ERR_LIB_SSL, SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
0f113f3e MC |
3577 | } |
3578 | ||
222561fe | 3579 | X509_free(x509); |
25aaa98a | 3580 | EVP_PKEY_free(pkey); |
0f113f3e MC |
3581 | if (i && !ssl3_check_client_certificate(s)) |
3582 | i = 0; | |
3583 | if (i == 0) { | |
3584 | if (s->version == SSL3_VERSION) { | |
555cbb32 | 3585 | s->s3.tmp.cert_req = 0; |
0f113f3e | 3586 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); |
b9908bf9 | 3587 | return WORK_FINISHED_CONTINUE; |
0f113f3e | 3588 | } else { |
555cbb32 | 3589 | s->s3.tmp.cert_req = 2; |
b67cb09f | 3590 | s->ext.compress_certificate_from_peer[0] = TLSEXT_comp_cert_none; |
124037fd | 3591 | if (!ssl3_digest_cached_records(s, 0)) { |
f63a17d6 | 3592 | /* SSLfatal() already called */ |
eb5fd03b | 3593 | return WORK_ERROR; |
dab18ab5 | 3594 | } |
0f113f3e MC |
3595 | } |
3596 | } | |
3597 | ||
b67cb09f TS |
3598 | if (!SSL_CONNECTION_IS_TLS13(s) |
3599 | || (s->options & SSL_OP_NO_TX_CERTIFICATE_COMPRESSION) != 0) | |
3600 | s->ext.compress_certificate_from_peer[0] = TLSEXT_comp_cert_none; | |
3601 | ||
9d75dce3 TS |
3602 | if (s->post_handshake_auth == SSL_PHA_REQUESTED) |
3603 | return WORK_FINISHED_STOP; | |
b9908bf9 | 3604 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3605 | } |
3606 | ||
b9908bf9 | 3607 | /* Shouldn't ever get here */ |
c48ffbcc | 3608 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b9908bf9 MC |
3609 | return WORK_ERROR; |
3610 | } | |
3611 | ||
67ec6d2b MC |
3612 | CON_FUNC_RETURN tls_construct_client_certificate(SSL_CONNECTION *s, |
3613 | WPACKET *pkt) | |
b9908bf9 | 3614 | { |
38b051a1 TM |
3615 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
3616 | ||
3617 | if (SSL_CONNECTION_IS_TLS13(s)) { | |
9d75dce3 TS |
3618 | if (s->pha_context == NULL) { |
3619 | /* no context available, add 0-length context */ | |
3620 | if (!WPACKET_put_bytes_u8(pkt, 0)) { | |
c48ffbcc | 3621 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 3622 | return CON_FUNC_ERROR; |
9d75dce3 TS |
3623 | } |
3624 | } else if (!WPACKET_sub_memcpy_u8(pkt, s->pha_context, s->pha_context_len)) { | |
c48ffbcc | 3625 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 3626 | return CON_FUNC_ERROR; |
9d75dce3 | 3627 | } |
f63a17d6 MC |
3628 | } |
3629 | if (!ssl3_output_cert_chain(s, pkt, | |
555cbb32 | 3630 | (s->s3.tmp.cert_req == 2) ? NULL |
f63a17d6 MC |
3631 | : s->cert->key)) { |
3632 | /* SSLfatal() already called */ | |
67ec6d2b | 3633 | return CON_FUNC_ERROR; |
f7e393be MC |
3634 | } |
3635 | ||
38b051a1 | 3636 | if (SSL_CONNECTION_IS_TLS13(s) |
f7e393be | 3637 | && SSL_IS_FIRST_HANDSHAKE(s) |
38b051a1 | 3638 | && (!ssl->method->ssl3_enc->change_cipher_state(s, |
f7e393be | 3639 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE))) { |
c31ad0bb | 3640 | /* |
a2c2e000 | 3641 | * This is a fatal error, which leaves enc_write_ctx in an inconsistent |
f63a17d6 | 3642 | * state and thus ssl3_send_alert may crash. |
c31ad0bb | 3643 | */ |
c48ffbcc | 3644 | SSLfatal(s, SSL_AD_NO_ALERT, SSL_R_CANNOT_CHANGE_CIPHER); |
67ec6d2b | 3645 | return CON_FUNC_ERROR; |
0f113f3e | 3646 | } |
b9908bf9 | 3647 | |
67ec6d2b | 3648 | return CON_FUNC_SUCCESS; |
0f113f3e MC |
3649 | } |
3650 | ||
b67cb09f TS |
3651 | #ifndef OPENSSL_NO_COMP_ALG |
3652 | CON_FUNC_RETURN tls_construct_client_compressed_certificate(SSL_CONNECTION *sc, | |
3653 | WPACKET *pkt) | |
3654 | { | |
3655 | SSL *ssl = SSL_CONNECTION_GET_SSL(sc); | |
3656 | WPACKET tmppkt; | |
3657 | BUF_MEM *buf = NULL; | |
3658 | size_t length; | |
3659 | size_t max_length; | |
3660 | COMP_METHOD *method; | |
3661 | COMP_CTX *comp = NULL; | |
3662 | int comp_len; | |
3663 | int ret = 0; | |
3664 | int alg = sc->ext.compress_certificate_from_peer[0]; | |
3665 | ||
3666 | /* Note that sc->s3.tmp.cert_req == 2 is checked in write transition */ | |
3667 | ||
3668 | if ((buf = BUF_MEM_new()) == NULL || !WPACKET_init(&tmppkt, buf)) | |
3669 | goto err; | |
3670 | ||
3671 | /* Use the |tmppkt| for the to-be-compressed data */ | |
3672 | if (sc->pha_context == NULL) { | |
3673 | /* no context available, add 0-length context */ | |
3674 | if (!WPACKET_put_bytes_u8(&tmppkt, 0)) | |
3675 | goto err; | |
3676 | } else if (!WPACKET_sub_memcpy_u8(&tmppkt, sc->pha_context, sc->pha_context_len)) | |
3677 | goto err; | |
3678 | ||
3679 | if (!ssl3_output_cert_chain(sc, &tmppkt, sc->cert->key)) { | |
3680 | /* SSLfatal() already called */ | |
3681 | goto out; | |
3682 | } | |
3683 | ||
3684 | /* continue with the real |pkt| */ | |
3685 | if (!WPACKET_put_bytes_u16(pkt, alg) | |
3686 | || !WPACKET_get_total_written(&tmppkt, &length) | |
3687 | || !WPACKET_put_bytes_u24(pkt, length)) | |
3688 | goto err; | |
3689 | ||
3690 | switch (alg) { | |
3691 | case TLSEXT_comp_cert_zlib: | |
3692 | method = COMP_zlib(); | |
3693 | break; | |
3694 | case TLSEXT_comp_cert_brotli: | |
3695 | method = COMP_brotli_oneshot(); | |
3696 | break; | |
3697 | case TLSEXT_comp_cert_zstd: | |
3698 | method = COMP_zstd_oneshot(); | |
3699 | break; | |
3700 | default: | |
3701 | goto err; | |
3702 | } | |
3703 | max_length = ossl_calculate_comp_expansion(alg, length); | |
3704 | ||
3705 | if (!WPACKET_start_sub_packet_u24(pkt) | |
3706 | || !WPACKET_reserve_bytes(pkt, max_length, NULL) | |
3707 | || (comp = COMP_CTX_new(method)) == NULL) | |
3708 | goto err; | |
3709 | ||
3710 | comp_len = COMP_compress_block(comp, WPACKET_get_curr(pkt), max_length, | |
3711 | (unsigned char *)buf->data, length); | |
3712 | if (comp_len <= 0) | |
3713 | goto err; | |
3714 | ||
3715 | if (!WPACKET_allocate_bytes(pkt, comp_len, NULL) | |
3716 | || !WPACKET_close(pkt)) | |
3717 | goto err; | |
3718 | ||
3719 | if (SSL_IS_FIRST_HANDSHAKE(sc) | |
3720 | && (!ssl->method->ssl3_enc->change_cipher_state(sc, | |
3721 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE))) { | |
3722 | /* | |
3723 | * This is a fatal error, which leaves sc->enc_write_ctx in an | |
3724 | * inconsistent state and thus ssl3_send_alert may crash. | |
3725 | */ | |
3726 | SSLfatal(sc, SSL_AD_NO_ALERT, SSL_R_CANNOT_CHANGE_CIPHER); | |
3727 | goto out; | |
3728 | } | |
3729 | ret = 1; | |
3730 | goto out; | |
3731 | ||
3732 | err: | |
3733 | SSLfatal(sc, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
3734 | out: | |
3735 | WPACKET_cleanup(&tmppkt); | |
3736 | BUF_MEM_free(buf); | |
3737 | COMP_CTX_free(comp); | |
3738 | return ret; | |
3739 | } | |
3740 | #endif | |
3741 | ||
38b051a1 | 3742 | int ssl3_check_cert_and_algorithm(SSL_CONNECTION *s) |
0f113f3e | 3743 | { |
dd24857b DSH |
3744 | const SSL_CERT_LOOKUP *clu; |
3745 | size_t idx; | |
0f113f3e | 3746 | long alg_k, alg_a; |
d02b48c6 | 3747 | |
555cbb32 TS |
3748 | alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
3749 | alg_a = s->s3.tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 3750 | |
0f113f3e | 3751 | /* we don't have a certificate */ |
dd24857b DSH |
3752 | if (!(alg_a & SSL_aCERT)) |
3753 | return 1; | |
d02b48c6 | 3754 | |
0f113f3e | 3755 | /* This is the passed certificate */ |
dd24857b | 3756 | clu = ssl_cert_lookup_by_pkey(X509_get0_pubkey(s->session->peer), &idx); |
d02b48c6 | 3757 | |
dd24857b DSH |
3758 | /* Check certificate is recognised and suitable for cipher */ |
3759 | if (clu == NULL || (alg_a & clu->amask) == 0) { | |
c48ffbcc | 3760 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_MISSING_SIGNING_CERT); |
f63a17d6 | 3761 | return 0; |
0f113f3e | 3762 | } |
0f113f3e | 3763 | |
dd24857b DSH |
3764 | if (clu->amask & SSL_aECDSA) { |
3765 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s)) | |
3766 | return 1; | |
c48ffbcc | 3767 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_BAD_ECC_CERT); |
f63a17d6 | 3768 | return 0; |
0f113f3e | 3769 | } |
462f4f4b | 3770 | |
dd24857b | 3771 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK) && idx != SSL_PKEY_RSA) { |
f63a17d6 | 3772 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
f63a17d6 MC |
3773 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); |
3774 | return 0; | |
0f113f3e | 3775 | } |
5b64ce89 | 3776 | |
555cbb32 | 3777 | if ((alg_k & SSL_kDHE) && (s->s3.peer_tmp == NULL)) { |
c48ffbcc | 3778 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f63a17d6 | 3779 | return 0; |
0f113f3e | 3780 | } |
d02b48c6 | 3781 | |
dd24857b | 3782 | return 1; |
0f113f3e MC |
3783 | } |
3784 | ||
e481f9b9 | 3785 | #ifndef OPENSSL_NO_NEXTPROTONEG |
67ec6d2b | 3786 | CON_FUNC_RETURN tls_construct_next_proto(SSL_CONNECTION *s, WPACKET *pkt) |
b9908bf9 | 3787 | { |
15e6be6c MC |
3788 | size_t len, padding_len; |
3789 | unsigned char *padding = NULL; | |
15e6be6c | 3790 | |
aff8c126 | 3791 | len = s->ext.npn_len; |
b9908bf9 | 3792 | padding_len = 32 - ((len + 2) % 32); |
15e6be6c | 3793 | |
aff8c126 | 3794 | if (!WPACKET_sub_memcpy_u8(pkt, s->ext.npn, len) |
7cea05dc | 3795 | || !WPACKET_sub_allocate_bytes_u8(pkt, padding_len, &padding)) { |
c48ffbcc | 3796 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 3797 | return CON_FUNC_ERROR; |
15e6be6c MC |
3798 | } |
3799 | ||
3800 | memset(padding, 0, padding_len); | |
3801 | ||
67ec6d2b | 3802 | return CON_FUNC_SUCCESS; |
b9908bf9 | 3803 | } |
6434abbf | 3804 | #endif |
368888bc | 3805 | |
38b051a1 | 3806 | MSG_PROCESS_RETURN tls_process_hello_req(SSL_CONNECTION *s, PACKET *pkt) |
c7f47786 | 3807 | { |
38b051a1 TM |
3808 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
3809 | ||
c7f47786 MC |
3810 | if (PACKET_remaining(pkt) > 0) { |
3811 | /* should contain no data */ | |
c48ffbcc | 3812 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
c7f47786 MC |
3813 | return MSG_PROCESS_ERROR; |
3814 | } | |
3815 | ||
db0f35dd TS |
3816 | if ((s->options & SSL_OP_NO_RENEGOTIATION)) { |
3817 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_RENEGOTIATION); | |
3818 | return MSG_PROCESS_FINISHED_READING; | |
3819 | } | |
3820 | ||
c7f47786 | 3821 | /* |
1f04f23e MC |
3822 | * This is a historical discrepancy (not in the RFC) maintained for |
3823 | * compatibility reasons. If a TLS client receives a HelloRequest it will | |
3824 | * attempt an abbreviated handshake. However if a DTLS client receives a | |
3825 | * HelloRequest it will do a full handshake. Either behaviour is reasonable | |
3826 | * but doing one for TLS and another for DTLS is odd. | |
c7f47786 | 3827 | */ |
38b051a1 TM |
3828 | if (SSL_CONNECTION_IS_DTLS(s)) |
3829 | SSL_renegotiate(ssl); | |
c7f47786 | 3830 | else |
38b051a1 | 3831 | SSL_renegotiate_abbreviated(ssl); |
c7f47786 MC |
3832 | |
3833 | return MSG_PROCESS_FINISHED_READING; | |
3834 | } | |
3835 | ||
38b051a1 TM |
3836 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL_CONNECTION *s, |
3837 | PACKET *pkt) | |
e46f2334 | 3838 | { |
e46f2334 | 3839 | PACKET extensions; |
3434f40b | 3840 | RAW_EXTENSION *rawexts = NULL; |
e46f2334 | 3841 | |
26b9172a MC |
3842 | if (!PACKET_as_length_prefixed_2(pkt, &extensions) |
3843 | || PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 3844 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
e46f2334 MC |
3845 | goto err; |
3846 | } | |
3847 | ||
fe874d27 MC |
3848 | if (!tls_collect_extensions(s, &extensions, |
3849 | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, &rawexts, | |
f63a17d6 | 3850 | NULL, 1) |
fe874d27 | 3851 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, |
f63a17d6 MC |
3852 | rawexts, NULL, 0, 1)) { |
3853 | /* SSLfatal() already called */ | |
3434f40b | 3854 | goto err; |
f63a17d6 | 3855 | } |
3434f40b | 3856 | |
1b0286a3 | 3857 | OPENSSL_free(rawexts); |
e46f2334 MC |
3858 | return MSG_PROCESS_CONTINUE_READING; |
3859 | ||
3860 | err: | |
1b0286a3 | 3861 | OPENSSL_free(rawexts); |
e46f2334 MC |
3862 | return MSG_PROCESS_ERROR; |
3863 | } | |
3864 | ||
38b051a1 | 3865 | int ssl_do_client_cert_cb(SSL_CONNECTION *s, X509 **px509, EVP_PKEY **ppkey) |
0f113f3e MC |
3866 | { |
3867 | int i = 0; | |
38b051a1 TM |
3868 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
3869 | ||
368888bc | 3870 | #ifndef OPENSSL_NO_ENGINE |
38b051a1 | 3871 | if (sctx->client_cert_engine) { |
301fcb28 | 3872 | i = tls_engine_load_ssl_client_cert(s, px509, ppkey); |
0f113f3e MC |
3873 | if (i != 0) |
3874 | return i; | |
3875 | } | |
3876 | #endif | |
38b051a1 TM |
3877 | if (sctx->client_cert_cb) |
3878 | i = sctx->client_cert_cb(SSL_CONNECTION_GET_SSL(s), px509, ppkey); | |
0f113f3e MC |
3879 | return i; |
3880 | } | |
d45ba43d | 3881 | |
38b051a1 TM |
3882 | int ssl_cipher_list_to_bytes(SSL_CONNECTION *s, STACK_OF(SSL_CIPHER) *sk, |
3883 | WPACKET *pkt) | |
d45ba43d | 3884 | { |
2c7b4dbc | 3885 | int i; |
aafec89c | 3886 | size_t totlen = 0, len, maxlen, maxverok = 0; |
d45ba43d | 3887 | int empty_reneg_info_scsv = !s->renegotiate; |
38b051a1 | 3888 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
1d0c08b4 | 3889 | |
d45ba43d | 3890 | /* Set disabled masks for this session */ |
1d0c08b4 | 3891 | if (!ssl_set_client_disabled(s)) { |
c48ffbcc | 3892 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_NO_PROTOCOLS_AVAILABLE); |
1d0c08b4 MC |
3893 | return 0; |
3894 | } | |
d45ba43d | 3895 | |
f63a17d6 | 3896 | if (sk == NULL) { |
c48ffbcc | 3897 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
26a7d938 | 3898 | return 0; |
f63a17d6 | 3899 | } |
d45ba43d | 3900 | |
2c7b4dbc MC |
3901 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
3902 | # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6 | |
3903 | # error Max cipher length too short | |
3904 | # endif | |
3905 | /* | |
3906 | * Some servers hang if client hello > 256 bytes as hack workaround | |
3907 | * chop number of supported ciphers to keep it well below this if we | |
3908 | * use TLS v1.2 | |
3909 | */ | |
38b051a1 | 3910 | if (TLS1_get_version(ssl) >= TLS1_2_VERSION) |
2c7b4dbc MC |
3911 | maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; |
3912 | else | |
3913 | #endif | |
3914 | /* Maximum length that can be stored in 2 bytes. Length must be even */ | |
3915 | maxlen = 0xfffe; | |
3916 | ||
3917 | if (empty_reneg_info_scsv) | |
3918 | maxlen -= 2; | |
3919 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) | |
3920 | maxlen -= 2; | |
3921 | ||
3922 | for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) { | |
3923 | const SSL_CIPHER *c; | |
3924 | ||
d45ba43d MC |
3925 | c = sk_SSL_CIPHER_value(sk, i); |
3926 | /* Skip disabled ciphers */ | |
8af91fd9 | 3927 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0)) |
d45ba43d | 3928 | continue; |
2c7b4dbc | 3929 | |
38b051a1 | 3930 | if (!ssl->method->put_cipher_by_char(c, pkt, &len)) { |
c48ffbcc | 3931 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
2c7b4dbc MC |
3932 | return 0; |
3933 | } | |
3934 | ||
aafec89c MC |
3935 | /* Sanity check that the maximum version we offer has ciphers enabled */ |
3936 | if (!maxverok) { | |
38b051a1 | 3937 | if (SSL_CONNECTION_IS_DTLS(s)) { |
555cbb32 TS |
3938 | if (DTLS_VERSION_GE(c->max_dtls, s->s3.tmp.max_ver) |
3939 | && DTLS_VERSION_LE(c->min_dtls, s->s3.tmp.max_ver)) | |
aafec89c MC |
3940 | maxverok = 1; |
3941 | } else { | |
555cbb32 TS |
3942 | if (c->max_tls >= s->s3.tmp.max_ver |
3943 | && c->min_tls <= s->s3.tmp.max_ver) | |
aafec89c MC |
3944 | maxverok = 1; |
3945 | } | |
3946 | } | |
3947 | ||
2c7b4dbc | 3948 | totlen += len; |
d45ba43d | 3949 | } |
2c7b4dbc | 3950 | |
aafec89c | 3951 | if (totlen == 0 || !maxverok) { |
c48ffbcc RL |
3952 | const char *maxvertext = |
3953 | !maxverok | |
3954 | ? "No ciphers enabled for max supported SSL/TLS version" | |
3955 | : NULL; | |
aafec89c | 3956 | |
c48ffbcc RL |
3957 | SSLfatal_data(s, SSL_AD_INTERNAL_ERROR, SSL_R_NO_CIPHERS_AVAILABLE, |
3958 | maxvertext); | |
2c7b4dbc MC |
3959 | return 0; |
3960 | } | |
3961 | ||
3962 | if (totlen != 0) { | |
d45ba43d MC |
3963 | if (empty_reneg_info_scsv) { |
3964 | static SSL_CIPHER scsv = { | |
bbb4ceb8 | 3965 | 0, NULL, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 |
d45ba43d | 3966 | }; |
38b051a1 | 3967 | if (!ssl->method->put_cipher_by_char(&scsv, pkt, &len)) { |
c48ffbcc | 3968 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
2c7b4dbc MC |
3969 | return 0; |
3970 | } | |
d45ba43d MC |
3971 | } |
3972 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
3973 | static SSL_CIPHER scsv = { | |
bbb4ceb8 | 3974 | 0, NULL, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 |
d45ba43d | 3975 | }; |
38b051a1 | 3976 | if (!ssl->method->put_cipher_by_char(&scsv, pkt, &len)) { |
c48ffbcc | 3977 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
2c7b4dbc MC |
3978 | return 0; |
3979 | } | |
d45ba43d MC |
3980 | } |
3981 | } | |
3982 | ||
2c7b4dbc | 3983 | return 1; |
d45ba43d | 3984 | } |
ef6c191b | 3985 | |
67ec6d2b | 3986 | CON_FUNC_RETURN tls_construct_end_of_early_data(SSL_CONNECTION *s, WPACKET *pkt) |
ef6c191b MC |
3987 | { |
3988 | if (s->early_data_state != SSL_EARLY_DATA_WRITE_RETRY | |
3989 | && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING) { | |
c48ffbcc | 3990 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
67ec6d2b | 3991 | return CON_FUNC_ERROR; |
ef6c191b MC |
3992 | } |
3993 | ||
3994 | s->early_data_state = SSL_EARLY_DATA_FINISHED_WRITING; | |
67ec6d2b | 3995 | return CON_FUNC_SUCCESS; |
ef6c191b | 3996 | } |