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846e33c7 | 1 | /* |
0c679f55 | 2 | * Copyright 1995-2025 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" |
da9342ed | 30 | #include "internal/comp.h" |
bf553267 | 31 | #include "internal/ssl_unwrap.h" |
f9b3bff6 | 32 | |
38b051a1 TM |
33 | static MSG_PROCESS_RETURN tls_process_as_hello_retry_request(SSL_CONNECTION *s, |
34 | PACKET *pkt); | |
35 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL_CONNECTION *s, | |
36 | PACKET *pkt); | |
37 | ||
38 | static ossl_inline int cert_req_allowed(SSL_CONNECTION *s); | |
39 | static int key_exchange_expected(SSL_CONNECTION *s); | |
40 | static int ssl_cipher_list_to_bytes(SSL_CONNECTION *s, STACK_OF(SSL_CIPHER) *sk, | |
ae2f7b37 | 41 | WPACKET *pkt); |
ea262260 | 42 | |
3c95ef22 TS |
43 | static ossl_inline int received_server_cert(SSL_CONNECTION *sc) |
44 | { | |
45 | return sc->session->peer_rpk != NULL || sc->session->peer != NULL; | |
46 | } | |
47 | ||
61ae935a MC |
48 | /* |
49 | * Is a CertificateRequest message allowed at the moment or not? | |
50 | * | |
51 | * Return values are: | |
52 | * 1: Yes | |
53 | * 0: No | |
54 | */ | |
38b051a1 | 55 | static ossl_inline int cert_req_allowed(SSL_CONNECTION *s) |
61ae935a MC |
56 | { |
57 | /* TLS does not like anon-DH with client cert */ | |
b7fa1f98 | 58 | if ((s->version > SSL3_VERSION |
555cbb32 TS |
59 | && (s->s3.tmp.new_cipher->algorithm_auth & SSL_aNULL)) |
60 | || (s->s3.tmp.new_cipher->algorithm_auth & (SSL_aSRP | SSL_aPSK))) | |
61ae935a MC |
61 | return 0; |
62 | ||
63 | return 1; | |
64 | } | |
65 | ||
66 | /* | |
a455d0f6 | 67 | * Should we expect the ServerKeyExchange message or not? |
61ae935a MC |
68 | * |
69 | * Return values are: | |
70 | * 1: Yes | |
71 | * 0: No | |
72 | */ | |
38b051a1 | 73 | static int key_exchange_expected(SSL_CONNECTION *s) |
61ae935a | 74 | { |
555cbb32 | 75 | long alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
61ae935a MC |
76 | |
77 | /* | |
78 | * Can't skip server key exchange if this is an ephemeral | |
a455d0f6 | 79 | * ciphersuite or for SRP |
61ae935a | 80 | */ |
a455d0f6 MC |
81 | if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK |
82 | | SSL_kSRP)) { | |
83 | return 1; | |
61ae935a MC |
84 | } |
85 | ||
a455d0f6 | 86 | return 0; |
61ae935a MC |
87 | } |
88 | ||
0f1e51ea MC |
89 | /* |
90 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed | |
91 | * handshake state transitions when a TLS1.3 client is reading messages from the | |
92 | * server. The message type that the server has sent is provided in |mt|. The | |
93 | * current state is in |s->statem.hand_state|. | |
94 | * | |
94ed2c67 MC |
95 | * Return values are 1 for success (transition allowed) and 0 on error |
96 | * (transition not allowed) | |
0f1e51ea | 97 | */ |
38b051a1 | 98 | static int ossl_statem_client13_read_transition(SSL_CONNECTION *s, int mt) |
0f1e51ea MC |
99 | { |
100 | OSSL_STATEM *st = &s->statem; | |
101 | ||
102 | /* | |
103 | * Note: There is no case for TLS_ST_CW_CLNT_HELLO, because we haven't | |
104 | * yet negotiated TLSv1.3 at that point so that is handled by | |
105 | * ossl_statem_client_read_transition() | |
106 | */ | |
107 | ||
108 | switch (st->hand_state) { | |
109 | default: | |
110 | break; | |
111 | ||
3847d426 MC |
112 | case TLS_ST_CW_CLNT_HELLO: |
113 | /* | |
114 | * This must a ClientHello following a HelloRetryRequest, so the only | |
115 | * thing we can get now is a ServerHello. | |
116 | */ | |
117 | if (mt == SSL3_MT_SERVER_HELLO) { | |
118 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
119 | return 1; | |
120 | } | |
121 | break; | |
122 | ||
0f1e51ea | 123 | case TLS_ST_CR_SRVR_HELLO: |
e46f2334 MC |
124 | if (mt == SSL3_MT_ENCRYPTED_EXTENSIONS) { |
125 | st->hand_state = TLS_ST_CR_ENCRYPTED_EXTENSIONS; | |
126 | return 1; | |
127 | } | |
128 | break; | |
129 | ||
130 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
0f1e51ea | 131 | if (s->hit) { |
92760c21 MC |
132 | if (mt == SSL3_MT_FINISHED) { |
133 | st->hand_state = TLS_ST_CR_FINISHED; | |
0f1e51ea MC |
134 | return 1; |
135 | } | |
136 | } else { | |
92760c21 MC |
137 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { |
138 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
139 | return 1; | |
f5ca0b04 MC |
140 | } |
141 | if (mt == SSL3_MT_CERTIFICATE) { | |
0f1e51ea MC |
142 | st->hand_state = TLS_ST_CR_CERT; |
143 | return 1; | |
144 | } | |
b67cb09f TS |
145 | #ifndef OPENSSL_NO_COMP_ALG |
146 | if (mt == SSL3_MT_COMPRESSED_CERTIFICATE | |
147 | && s->ext.compress_certificate_sent) { | |
148 | st->hand_state = TLS_ST_CR_COMP_CERT; | |
149 | return 1; | |
150 | } | |
151 | #endif | |
0f1e51ea MC |
152 | } |
153 | break; | |
154 | ||
92760c21 MC |
155 | case TLS_ST_CR_CERT_REQ: |
156 | if (mt == SSL3_MT_CERTIFICATE) { | |
157 | st->hand_state = TLS_ST_CR_CERT; | |
158 | return 1; | |
159 | } | |
b67cb09f TS |
160 | #ifndef OPENSSL_NO_COMP_ALG |
161 | if (mt == SSL3_MT_COMPRESSED_CERTIFICATE | |
162 | && s->ext.compress_certificate_sent) { | |
163 | st->hand_state = TLS_ST_CR_COMP_CERT; | |
164 | return 1; | |
165 | } | |
166 | #endif | |
92760c21 MC |
167 | break; |
168 | ||
0f1e51ea | 169 | case TLS_ST_CR_CERT: |
b67cb09f | 170 | case TLS_ST_CR_COMP_CERT: |
2c5dfdc3 MC |
171 | if (mt == SSL3_MT_CERTIFICATE_VERIFY) { |
172 | st->hand_state = TLS_ST_CR_CERT_VRFY; | |
173 | return 1; | |
174 | } | |
175 | break; | |
176 | ||
177 | case TLS_ST_CR_CERT_VRFY: | |
0f1e51ea MC |
178 | if (mt == SSL3_MT_FINISHED) { |
179 | st->hand_state = TLS_ST_CR_FINISHED; | |
180 | return 1; | |
181 | } | |
182 | break; | |
cc2455bf MC |
183 | |
184 | case TLS_ST_OK: | |
185 | if (mt == SSL3_MT_NEWSESSION_TICKET) { | |
186 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
187 | return 1; | |
188 | } | |
50a0af2e | 189 | if (mt == SSL3_MT_KEY_UPDATE && !SSL_IS_QUIC_HANDSHAKE(s)) { |
e1c3de44 MC |
190 | st->hand_state = TLS_ST_CR_KEY_UPDATE; |
191 | return 1; | |
192 | } | |
9d75dce3 | 193 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { |
5c587fb6 | 194 | #if DTLS_MAX_VERSION_INTERNAL != DTLS1_2_VERSION |
407820c0 P |
195 | /* Restore digest for PHA before adding message.*/ |
196 | # error Internal DTLS version error | |
9d75dce3 | 197 | #endif |
38b051a1 TM |
198 | if (!SSL_CONNECTION_IS_DTLS(s) |
199 | && s->post_handshake_auth == SSL_PHA_EXT_SENT) { | |
9d75dce3 TS |
200 | s->post_handshake_auth = SSL_PHA_REQUESTED; |
201 | /* | |
202 | * In TLS, this is called before the message is added to the | |
203 | * digest. In DTLS, this is expected to be called after adding | |
204 | * to the digest. Either move the digest restore, or add the | |
205 | * message here after the swap, or do it after the clientFinished? | |
206 | */ | |
207 | if (!tls13_restore_handshake_digest_for_pha(s)) { | |
208 | /* SSLfatal() already called */ | |
209 | return 0; | |
210 | } | |
211 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
212 | return 1; | |
213 | } | |
214 | } | |
cc2455bf | 215 | break; |
0f1e51ea MC |
216 | } |
217 | ||
0f1e51ea | 218 | /* No valid transition found */ |
0f1e51ea MC |
219 | return 0; |
220 | } | |
221 | ||
61ae935a | 222 | /* |
8481f583 MC |
223 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed |
224 | * handshake state transitions when the client is reading messages from the | |
225 | * server. The message type that the server has sent is provided in |mt|. The | |
226 | * current state is in |s->statem.hand_state|. | |
61ae935a | 227 | * |
94ed2c67 MC |
228 | * Return values are 1 for success (transition allowed) and 0 on error |
229 | * (transition not allowed) | |
61ae935a | 230 | */ |
38b051a1 | 231 | int ossl_statem_client_read_transition(SSL_CONNECTION *s, int mt) |
61ae935a | 232 | { |
d6f1a6e9 | 233 | OSSL_STATEM *st = &s->statem; |
a455d0f6 | 234 | int ske_expected; |
61ae935a | 235 | |
0f1e51ea | 236 | /* |
3847d426 MC |
237 | * Note that after writing the first ClientHello we don't know what version |
238 | * we are going to negotiate yet, so we don't take this branch until later. | |
0f1e51ea | 239 | */ |
38b051a1 | 240 | if (SSL_CONNECTION_IS_TLS13(s)) { |
5abeaf35 MC |
241 | if (!ossl_statem_client13_read_transition(s, mt)) |
242 | goto err; | |
243 | return 1; | |
244 | } | |
0f1e51ea | 245 | |
a230b26e | 246 | switch (st->hand_state) { |
f3b3d7f0 RS |
247 | default: |
248 | break; | |
249 | ||
61ae935a MC |
250 | case TLS_ST_CW_CLNT_HELLO: |
251 | if (mt == SSL3_MT_SERVER_HELLO) { | |
252 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
253 | return 1; | |
254 | } | |
255 | ||
38b051a1 | 256 | if (SSL_CONNECTION_IS_DTLS(s)) { |
61ae935a MC |
257 | if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { |
258 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
259 | return 1; | |
260 | } | |
261 | } | |
262 | break; | |
263 | ||
d7f8783f | 264 | case TLS_ST_EARLY_DATA: |
4004ce5f MC |
265 | /* |
266 | * We've not actually selected TLSv1.3 yet, but we have sent early | |
267 | * data. The only thing allowed now is a ServerHello or a | |
268 | * HelloRetryRequest. | |
269 | */ | |
270 | if (mt == SSL3_MT_SERVER_HELLO) { | |
271 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
272 | return 1; | |
273 | } | |
4004ce5f MC |
274 | break; |
275 | ||
61ae935a MC |
276 | case TLS_ST_CR_SRVR_HELLO: |
277 | if (s->hit) { | |
aff8c126 | 278 | if (s->ext.ticket_expected) { |
61ae935a MC |
279 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
280 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
281 | return 1; | |
282 | } | |
283 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
284 | st->hand_state = TLS_ST_CR_CHANGE; | |
285 | return 1; | |
286 | } | |
287 | } else { | |
38b051a1 TM |
288 | if (SSL_CONNECTION_IS_DTLS(s) |
289 | && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
61ae935a MC |
290 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; |
291 | return 1; | |
ad3819c2 | 292 | } else if (s->version >= TLS1_VERSION |
aff8c126 RS |
293 | && s->ext.session_secret_cb != NULL |
294 | && s->session->ext.tick != NULL | |
a230b26e | 295 | && mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
ad3819c2 MC |
296 | /* |
297 | * Normally, we can tell if the server is resuming the session | |
298 | * from the session ID. EAP-FAST (RFC 4851), however, relies on | |
299 | * the next server message after the ServerHello to determine if | |
300 | * the server is resuming. | |
301 | */ | |
302 | s->hit = 1; | |
303 | st->hand_state = TLS_ST_CR_CHANGE; | |
304 | return 1; | |
555cbb32 | 305 | } else if (!(s->s3.tmp.new_cipher->algorithm_auth |
a230b26e | 306 | & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) { |
61ae935a MC |
307 | if (mt == SSL3_MT_CERTIFICATE) { |
308 | st->hand_state = TLS_ST_CR_CERT; | |
309 | return 1; | |
310 | } | |
311 | } else { | |
a455d0f6 | 312 | ske_expected = key_exchange_expected(s); |
a455d0f6 MC |
313 | /* SKE is optional for some PSK ciphersuites */ |
314 | if (ske_expected | |
555cbb32 | 315 | || ((s->s3.tmp.new_cipher->algorithm_mkey & SSL_PSK) |
a230b26e | 316 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { |
a455d0f6 MC |
317 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
318 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
319 | return 1; | |
320 | } | |
321 | } else if (mt == SSL3_MT_CERTIFICATE_REQUEST | |
a230b26e EK |
322 | && cert_req_allowed(s)) { |
323 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
324 | return 1; | |
a455d0f6 | 325 | } else if (mt == SSL3_MT_SERVER_DONE) { |
a230b26e EK |
326 | st->hand_state = TLS_ST_CR_SRVR_DONE; |
327 | return 1; | |
61ae935a MC |
328 | } |
329 | } | |
330 | } | |
331 | break; | |
332 | ||
333 | case TLS_ST_CR_CERT: | |
b67cb09f | 334 | case TLS_ST_CR_COMP_CERT: |
bb1aaab4 MC |
335 | /* |
336 | * The CertificateStatus message is optional even if | |
aff8c126 | 337 | * |ext.status_expected| is set |
bb1aaab4 | 338 | */ |
aff8c126 | 339 | if (s->ext.status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) { |
bb1aaab4 MC |
340 | st->hand_state = TLS_ST_CR_CERT_STATUS; |
341 | return 1; | |
a455d0f6 MC |
342 | } |
343 | /* Fall through */ | |
344 | ||
345 | case TLS_ST_CR_CERT_STATUS: | |
346 | ske_expected = key_exchange_expected(s); | |
a455d0f6 | 347 | /* SKE is optional for some PSK ciphersuites */ |
555cbb32 | 348 | if (ske_expected || ((s->s3.tmp.new_cipher->algorithm_mkey & SSL_PSK) |
a230b26e | 349 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { |
61ae935a MC |
350 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
351 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
352 | return 1; | |
61ae935a | 353 | } |
672f3337 | 354 | goto err; |
61ae935a | 355 | } |
a455d0f6 | 356 | /* Fall through */ |
61ae935a | 357 | |
a455d0f6 MC |
358 | case TLS_ST_CR_KEY_EXCH: |
359 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { | |
360 | if (cert_req_allowed(s)) { | |
61ae935a MC |
361 | st->hand_state = TLS_ST_CR_CERT_REQ; |
362 | return 1; | |
61ae935a | 363 | } |
672f3337 | 364 | goto err; |
61ae935a | 365 | } |
a455d0f6 | 366 | /* Fall through */ |
61ae935a MC |
367 | |
368 | case TLS_ST_CR_CERT_REQ: | |
369 | if (mt == SSL3_MT_SERVER_DONE) { | |
370 | st->hand_state = TLS_ST_CR_SRVR_DONE; | |
371 | return 1; | |
372 | } | |
373 | break; | |
374 | ||
375 | case TLS_ST_CW_FINISHED: | |
aff8c126 | 376 | if (s->ext.ticket_expected) { |
c45d6b2b DB |
377 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
378 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
379 | return 1; | |
380 | } | |
61ae935a MC |
381 | } else 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_SESSION_TICKET: | |
388 | if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
389 | st->hand_state = TLS_ST_CR_CHANGE; | |
390 | return 1; | |
391 | } | |
392 | break; | |
393 | ||
394 | case TLS_ST_CR_CHANGE: | |
395 | if (mt == SSL3_MT_FINISHED) { | |
396 | st->hand_state = TLS_ST_CR_FINISHED; | |
397 | return 1; | |
398 | } | |
399 | break; | |
c7f47786 MC |
400 | |
401 | case TLS_ST_OK: | |
4004ce5f | 402 | if (mt == SSL3_MT_HELLO_REQUEST) { |
c7f47786 MC |
403 | st->hand_state = TLS_ST_CR_HELLO_REQ; |
404 | return 1; | |
405 | } | |
406 | break; | |
61ae935a MC |
407 | } |
408 | ||
672f3337 | 409 | err: |
61ae935a | 410 | /* No valid transition found */ |
38b051a1 | 411 | if (SSL_CONNECTION_IS_DTLS(s) && mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
f20404fc MC |
412 | BIO *rbio; |
413 | ||
414 | /* | |
415 | * CCS messages don't have a message sequence number so this is probably | |
416 | * because of an out-of-order CCS. We'll just drop it. | |
417 | */ | |
418 | s->init_num = 0; | |
419 | s->rwstate = SSL_READING; | |
38b051a1 | 420 | rbio = SSL_get_rbio(SSL_CONNECTION_GET_SSL(s)); |
f20404fc MC |
421 | BIO_clear_retry_flags(rbio); |
422 | BIO_set_retry_read(rbio); | |
423 | return 0; | |
424 | } | |
c48ffbcc | 425 | SSLfatal(s, SSL3_AD_UNEXPECTED_MESSAGE, SSL_R_UNEXPECTED_MESSAGE); |
61ae935a MC |
426 | return 0; |
427 | } | |
428 | ||
3c95ef22 TS |
429 | static int do_compressed_cert(SSL_CONNECTION *sc) |
430 | { | |
431 | /* If we negotiated RPK, we won't try to compress it */ | |
432 | return sc->ext.client_cert_type == TLSEXT_cert_type_x509 | |
433 | && sc->ext.compress_certificate_from_peer[0] != TLSEXT_comp_cert_none; | |
434 | } | |
435 | ||
61ae935a | 436 | /* |
0f1e51ea MC |
437 | * ossl_statem_client13_write_transition() works out what handshake state to |
438 | * move to next when the TLSv1.3 client is writing messages to be sent to the | |
439 | * server. | |
0f1e51ea | 440 | */ |
38b051a1 | 441 | static WRITE_TRAN ossl_statem_client13_write_transition(SSL_CONNECTION *s) |
0f1e51ea MC |
442 | { |
443 | OSSL_STATEM *st = &s->statem; | |
444 | ||
445 | /* | |
3847d426 MC |
446 | * Note: There are no cases for TLS_ST_BEFORE because we haven't negotiated |
447 | * TLSv1.3 yet at that point. They are handled by | |
448 | * ossl_statem_client_write_transition(). | |
0f1e51ea MC |
449 | */ |
450 | switch (st->hand_state) { | |
e43e6b19 TS |
451 | default: |
452 | /* Shouldn't happen */ | |
c48ffbcc | 453 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
e43e6b19 TS |
454 | return WRITE_TRAN_ERROR; |
455 | ||
9d75dce3 TS |
456 | case TLS_ST_CR_CERT_REQ: |
457 | if (s->post_handshake_auth == SSL_PHA_REQUESTED) { | |
3c95ef22 | 458 | if (do_compressed_cert(s)) |
b67cb09f TS |
459 | st->hand_state = TLS_ST_CW_COMP_CERT; |
460 | else | |
461 | st->hand_state = TLS_ST_CW_CERT; | |
9d75dce3 TS |
462 | return WRITE_TRAN_CONTINUE; |
463 | } | |
1bf4cb0f MC |
464 | /* |
465 | * We should only get here if we received a CertificateRequest after | |
466 | * we already sent close_notify | |
467 | */ | |
468 | if (!ossl_assert((s->shutdown & SSL_SENT_SHUTDOWN) != 0)) { | |
469 | /* Shouldn't happen - same as default case */ | |
c48ffbcc | 470 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
1bf4cb0f MC |
471 | return WRITE_TRAN_ERROR; |
472 | } | |
473 | st->hand_state = TLS_ST_OK; | |
474 | return WRITE_TRAN_CONTINUE; | |
0f1e51ea | 475 | |
92760c21 | 476 | case TLS_ST_CR_FINISHED: |
ef6c191b MC |
477 | if (s->early_data_state == SSL_EARLY_DATA_WRITE_RETRY |
478 | || s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING) | |
d7f8783f | 479 | st->hand_state = TLS_ST_PENDING_EARLY_DATA_END; |
4d02f870 | 480 | else if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0 |
fc7129dc | 481 | && s->hello_retry_request == SSL_HRR_NONE) |
4d02f870 | 482 | st->hand_state = TLS_ST_CW_CHANGE; |
b67cb09f TS |
483 | else if (s->s3.tmp.cert_req == 0) |
484 | st->hand_state = TLS_ST_CW_FINISHED; | |
3c95ef22 | 485 | else if (do_compressed_cert(s)) |
b67cb09f | 486 | st->hand_state = TLS_ST_CW_COMP_CERT; |
564547e4 | 487 | else |
b67cb09f | 488 | st->hand_state = TLS_ST_CW_CERT; |
cee0628e JC |
489 | |
490 | s->ts_msg_read = ossl_time_now(); | |
564547e4 MC |
491 | return WRITE_TRAN_CONTINUE; |
492 | ||
d7f8783f | 493 | case TLS_ST_PENDING_EARLY_DATA_END: |
1b3f27f9 | 494 | if (s->ext.early_data == SSL_EARLY_DATA_ACCEPTED && !SSL_NO_EOED(s)) { |
ef6c191b MC |
495 | st->hand_state = TLS_ST_CW_END_OF_EARLY_DATA; |
496 | return WRITE_TRAN_CONTINUE; | |
497 | } | |
498 | /* Fall through */ | |
499 | ||
500 | case TLS_ST_CW_END_OF_EARLY_DATA: | |
4d02f870 | 501 | case TLS_ST_CW_CHANGE: |
b67cb09f TS |
502 | if (s->s3.tmp.cert_req == 0) |
503 | st->hand_state = TLS_ST_CW_FINISHED; | |
3c95ef22 | 504 | else if (do_compressed_cert(s)) |
b67cb09f TS |
505 | st->hand_state = TLS_ST_CW_COMP_CERT; |
506 | else | |
507 | st->hand_state = TLS_ST_CW_CERT; | |
0f1e51ea MC |
508 | return WRITE_TRAN_CONTINUE; |
509 | ||
b67cb09f | 510 | case TLS_ST_CW_COMP_CERT: |
0f1e51ea MC |
511 | case TLS_ST_CW_CERT: |
512 | /* If a non-empty Certificate we also send CertificateVerify */ | |
555cbb32 | 513 | st->hand_state = (s->s3.tmp.cert_req == 1) ? TLS_ST_CW_CERT_VRFY |
92760c21 | 514 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
515 | return WRITE_TRAN_CONTINUE; |
516 | ||
517 | case TLS_ST_CW_CERT_VRFY: | |
0f1e51ea MC |
518 | st->hand_state = TLS_ST_CW_FINISHED; |
519 | return WRITE_TRAN_CONTINUE; | |
520 | ||
e1c3de44 | 521 | case TLS_ST_CR_KEY_UPDATE: |
9412b3ad | 522 | case TLS_ST_CW_KEY_UPDATE: |
cc2455bf | 523 | case TLS_ST_CR_SESSION_TICKET: |
0f1e51ea | 524 | case TLS_ST_CW_FINISHED: |
94ed2c67 | 525 | st->hand_state = TLS_ST_OK; |
94ed2c67 | 526 | return WRITE_TRAN_CONTINUE; |
cc2455bf MC |
527 | |
528 | case TLS_ST_OK: | |
9412b3ad MC |
529 | if (s->key_update != SSL_KEY_UPDATE_NONE) { |
530 | st->hand_state = TLS_ST_CW_KEY_UPDATE; | |
531 | return WRITE_TRAN_CONTINUE; | |
532 | } | |
533 | ||
534 | /* Try to read from the server instead */ | |
cc2455bf | 535 | return WRITE_TRAN_FINISHED; |
0f1e51ea MC |
536 | } |
537 | } | |
538 | ||
539 | /* | |
540 | * ossl_statem_client_write_transition() works out what handshake state to | |
541 | * move to next when the client is writing messages to be sent to the server. | |
61ae935a | 542 | */ |
38b051a1 | 543 | WRITE_TRAN ossl_statem_client_write_transition(SSL_CONNECTION *s) |
61ae935a | 544 | { |
d6f1a6e9 | 545 | OSSL_STATEM *st = &s->statem; |
61ae935a | 546 | |
0f1e51ea MC |
547 | /* |
548 | * Note that immediately before/after a ClientHello we don't know what | |
549 | * version we are going to negotiate yet, so we don't take this branch until | |
550 | * later | |
551 | */ | |
38b051a1 | 552 | if (SSL_CONNECTION_IS_TLS13(s)) |
0f1e51ea MC |
553 | return ossl_statem_client13_write_transition(s); |
554 | ||
a230b26e | 555 | switch (st->hand_state) { |
f3b3d7f0 RS |
556 | default: |
557 | /* Shouldn't happen */ | |
c48ffbcc | 558 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3b3d7f0 RS |
559 | return WRITE_TRAN_ERROR; |
560 | ||
a230b26e | 561 | case TLS_ST_OK: |
c7f47786 MC |
562 | if (!s->renegotiate) { |
563 | /* | |
564 | * We haven't requested a renegotiation ourselves so we must have | |
565 | * received a message from the server. Better read it. | |
566 | */ | |
567 | return WRITE_TRAN_FINISHED; | |
568 | } | |
018fcbec BE |
569 | /* Renegotiation */ |
570 | /* fall thru */ | |
a230b26e EK |
571 | case TLS_ST_BEFORE: |
572 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
573 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 574 | |
a230b26e | 575 | case TLS_ST_CW_CLNT_HELLO: |
95051052 MC |
576 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING |
577 | && !SSL_IS_QUIC_HANDSHAKE(s)) { | |
49e7fe12 MC |
578 | /* |
579 | * We are assuming this is a TLSv1.3 connection, although we haven't | |
580 | * actually selected a version yet. | |
581 | */ | |
066904cc MC |
582 | if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0) |
583 | st->hand_state = TLS_ST_CW_CHANGE; | |
584 | else | |
585 | st->hand_state = TLS_ST_EARLY_DATA; | |
49e7fe12 MC |
586 | return WRITE_TRAN_CONTINUE; |
587 | } | |
a230b26e EK |
588 | /* |
589 | * No transition at the end of writing because we don't know what | |
590 | * we will be sent | |
591 | */ | |
cee0628e | 592 | s->ts_msg_write = ossl_time_now(); |
a230b26e | 593 | return WRITE_TRAN_FINISHED; |
61ae935a | 594 | |
597c51bc | 595 | case TLS_ST_CR_SRVR_HELLO: |
318d3c0e MC |
596 | /* |
597 | * We only get here in TLSv1.3. We just received an HRR, so issue a | |
598 | * CCS unless middlebox compat mode is off, or we already issued one | |
599 | * because we did early data. | |
600 | */ | |
601 | if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0 | |
602 | && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING) | |
603 | st->hand_state = TLS_ST_CW_CHANGE; | |
604 | else | |
605 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
a2b97bdf MC |
606 | return WRITE_TRAN_CONTINUE; |
607 | ||
d7f8783f | 608 | case TLS_ST_EARLY_DATA: |
cee0628e | 609 | s->ts_msg_write = ossl_time_now(); |
4004ce5f MC |
610 | return WRITE_TRAN_FINISHED; |
611 | ||
a230b26e EK |
612 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
613 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
614 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 615 | |
a230b26e | 616 | case TLS_ST_CR_SRVR_DONE: |
cee0628e | 617 | s->ts_msg_read = ossl_time_now(); |
555cbb32 | 618 | if (s->s3.tmp.cert_req) |
a230b26e EK |
619 | st->hand_state = TLS_ST_CW_CERT; |
620 | else | |
61ae935a | 621 | st->hand_state = TLS_ST_CW_KEY_EXCH; |
a230b26e | 622 | return WRITE_TRAN_CONTINUE; |
61ae935a | 623 | |
a230b26e EK |
624 | case TLS_ST_CW_CERT: |
625 | st->hand_state = TLS_ST_CW_KEY_EXCH; | |
626 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 627 | |
a230b26e EK |
628 | case TLS_ST_CW_KEY_EXCH: |
629 | /* | |
630 | * For TLS, cert_req is set to 2, so a cert chain of nothing is | |
631 | * sent, but no verify packet is sent | |
632 | */ | |
633 | /* | |
634 | * XXX: For now, we do not support client authentication in ECDH | |
635 | * cipher suites with ECDH (rather than ECDSA) certificates. We | |
636 | * need to skip the certificate verify message when client's | |
637 | * ECDH public key is sent inside the client certificate. | |
638 | */ | |
555cbb32 | 639 | if (s->s3.tmp.cert_req == 1) { |
a230b26e EK |
640 | st->hand_state = TLS_ST_CW_CERT_VRFY; |
641 | } else { | |
61ae935a | 642 | st->hand_state = TLS_ST_CW_CHANGE; |
a230b26e | 643 | } |
555cbb32 | 644 | if (s->s3.flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { |
a230b26e EK |
645 | st->hand_state = TLS_ST_CW_CHANGE; |
646 | } | |
647 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 648 | |
a230b26e EK |
649 | case TLS_ST_CW_CERT_VRFY: |
650 | st->hand_state = TLS_ST_CW_CHANGE; | |
651 | return WRITE_TRAN_CONTINUE; | |
652 | ||
653 | case TLS_ST_CW_CHANGE: | |
318d3c0e MC |
654 | if (s->hello_retry_request == SSL_HRR_PENDING) { |
655 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
656 | } else if (s->early_data_state == SSL_EARLY_DATA_CONNECTING) { | |
066904cc MC |
657 | st->hand_state = TLS_ST_EARLY_DATA; |
658 | } else { | |
61ae935a | 659 | #if defined(OPENSSL_NO_NEXTPROTONEG) |
a230b26e | 660 | st->hand_state = TLS_ST_CW_FINISHED; |
066904cc | 661 | #else |
38b051a1 | 662 | if (!SSL_CONNECTION_IS_DTLS(s) && s->s3.npn_seen) |
066904cc MC |
663 | st->hand_state = TLS_ST_CW_NEXT_PROTO; |
664 | else | |
665 | st->hand_state = TLS_ST_CW_FINISHED; | |
61ae935a | 666 | #endif |
066904cc | 667 | } |
a230b26e | 668 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
669 | |
670 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
a230b26e EK |
671 | case TLS_ST_CW_NEXT_PROTO: |
672 | st->hand_state = TLS_ST_CW_FINISHED; | |
673 | return WRITE_TRAN_CONTINUE; | |
61ae935a MC |
674 | #endif |
675 | ||
a230b26e EK |
676 | case TLS_ST_CW_FINISHED: |
677 | if (s->hit) { | |
678 | st->hand_state = TLS_ST_OK; | |
a230b26e EK |
679 | return WRITE_TRAN_CONTINUE; |
680 | } else { | |
681 | return WRITE_TRAN_FINISHED; | |
682 | } | |
61ae935a | 683 | |
a230b26e EK |
684 | case TLS_ST_CR_FINISHED: |
685 | if (s->hit) { | |
686 | st->hand_state = TLS_ST_CW_CHANGE; | |
687 | return WRITE_TRAN_CONTINUE; | |
688 | } else { | |
689 | st->hand_state = TLS_ST_OK; | |
a230b26e EK |
690 | return WRITE_TRAN_CONTINUE; |
691 | } | |
c7f47786 MC |
692 | |
693 | case TLS_ST_CR_HELLO_REQ: | |
694 | /* | |
695 | * If we can renegotiate now then do so, otherwise wait for a more | |
696 | * convenient time. | |
697 | */ | |
38b051a1 | 698 | if (ssl3_renegotiate_check(SSL_CONNECTION_GET_SSL(s), 1)) { |
c7f47786 | 699 | if (!tls_setup_handshake(s)) { |
f63a17d6 | 700 | /* SSLfatal() already called */ |
c7f47786 MC |
701 | return WRITE_TRAN_ERROR; |
702 | } | |
703 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
704 | return WRITE_TRAN_CONTINUE; | |
705 | } | |
706 | st->hand_state = TLS_ST_OK; | |
c7f47786 | 707 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
708 | } |
709 | } | |
710 | ||
711 | /* | |
712 | * Perform any pre work that needs to be done prior to sending a message from | |
713 | * the client to the server. | |
714 | */ | |
38b051a1 | 715 | WORK_STATE ossl_statem_client_pre_work(SSL_CONNECTION *s, WORK_STATE wst) |
61ae935a | 716 | { |
d6f1a6e9 | 717 | OSSL_STATEM *st = &s->statem; |
61ae935a | 718 | |
a230b26e | 719 | switch (st->hand_state) { |
f3b3d7f0 RS |
720 | default: |
721 | /* No pre work to be done */ | |
722 | break; | |
723 | ||
61ae935a MC |
724 | case TLS_ST_CW_CLNT_HELLO: |
725 | s->shutdown = 0; | |
38b051a1 | 726 | if (SSL_CONNECTION_IS_DTLS(s)) { |
61ae935a | 727 | /* every DTLS ClientHello resets Finished MAC */ |
2c4a056f | 728 | if (!ssl3_init_finished_mac(s)) { |
f63a17d6 | 729 | /* SSLfatal() already called */ |
2c4a056f MC |
730 | return WORK_ERROR; |
731 | } | |
2c50d7fb MC |
732 | } else if (s->ext.early_data == SSL_EARLY_DATA_REJECTED) { |
733 | /* | |
734 | * This must be a second ClientHello after an HRR following an | |
735 | * earlier rejected attempt to send early data. Since we were | |
736 | * previously encrypting the early data we now need to reset the | |
737 | * write record layer in order to write in plaintext again. | |
738 | */ | |
739 | if (!ssl_set_new_record_layer(s, | |
740 | TLS_ANY_VERSION, | |
741 | OSSL_RECORD_DIRECTION_WRITE, | |
742 | OSSL_RECORD_PROTECTION_LEVEL_NONE, | |
3f9175c7 MC |
743 | NULL, 0, NULL, 0, NULL, 0, NULL, 0, |
744 | NULL, 0, NID_undef, NULL, NULL, | |
745 | NULL)) { | |
2c50d7fb MC |
746 | /* SSLfatal already called */ |
747 | return WORK_ERROR; | |
748 | } | |
61ae935a MC |
749 | } |
750 | break; | |
751 | ||
61ae935a | 752 | case TLS_ST_CW_CHANGE: |
38b051a1 | 753 | if (SSL_CONNECTION_IS_DTLS(s)) { |
61ae935a MC |
754 | if (s->hit) { |
755 | /* | |
756 | * We're into the last flight so we don't retransmit these | |
757 | * messages unless we need to. | |
758 | */ | |
759 | st->use_timer = 0; | |
760 | } | |
761 | #ifndef OPENSSL_NO_SCTP | |
38b051a1 | 762 | if (BIO_dgram_is_sctp(SSL_get_wbio(SSL_CONNECTION_GET_SSL(s)))) { |
a2c2e000 | 763 | /* Calls SSLfatal() as required */ |
61ae935a | 764 | return dtls_wait_for_dry(s); |
a2c2e000 | 765 | } |
61ae935a MC |
766 | #endif |
767 | } | |
f3b3d7f0 | 768 | break; |
61ae935a | 769 | |
d7f8783f | 770 | case TLS_ST_PENDING_EARLY_DATA_END: |
ef6c191b MC |
771 | /* |
772 | * If we've been called by SSL_do_handshake()/SSL_write(), or we did not | |
773 | * attempt to write early data before calling SSL_read() then we press | |
774 | * on with the handshake. Otherwise we pause here. | |
775 | */ | |
776 | if (s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING | |
777 | || s->early_data_state == SSL_EARLY_DATA_NONE) | |
778 | return WORK_FINISHED_CONTINUE; | |
779 | /* Fall through */ | |
780 | ||
781 | case TLS_ST_EARLY_DATA: | |
2a8db717 MC |
782 | return tls_finish_handshake(s, wst, 0, 1); |
783 | ||
61ae935a | 784 | case TLS_ST_OK: |
a2c2e000 | 785 | /* Calls SSLfatal() as required */ |
2a8db717 | 786 | return tls_finish_handshake(s, wst, 1, 1); |
61ae935a MC |
787 | } |
788 | ||
789 | return WORK_FINISHED_CONTINUE; | |
790 | } | |
791 | ||
792 | /* | |
793 | * Perform any work that needs to be done after sending a message from the | |
794 | * client to the server. | |
795 | */ | |
38b051a1 | 796 | WORK_STATE ossl_statem_client_post_work(SSL_CONNECTION *s, WORK_STATE wst) |
61ae935a | 797 | { |
d6f1a6e9 | 798 | OSSL_STATEM *st = &s->statem; |
38b051a1 | 799 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
61ae935a MC |
800 | |
801 | s->init_num = 0; | |
802 | ||
a230b26e | 803 | switch (st->hand_state) { |
f3b3d7f0 RS |
804 | default: |
805 | /* No post work to be done */ | |
806 | break; | |
807 | ||
61ae935a | 808 | case TLS_ST_CW_CLNT_HELLO: |
6cb42265 | 809 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING |
5cc807da | 810 | && s->max_early_data > 0) { |
6cb42265 MC |
811 | /* |
812 | * We haven't selected TLSv1.3 yet so we don't call the change | |
813 | * cipher state function associated with the SSL_METHOD. Instead | |
814 | * we call tls13_change_cipher_state() directly. | |
815 | */ | |
5cc807da | 816 | if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) == 0) { |
5cc807da MC |
817 | if (!tls13_change_cipher_state(s, |
818 | SSL3_CC_EARLY | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { | |
819 | /* SSLfatal() already called */ | |
820 | return WORK_ERROR; | |
821 | } | |
a2c2e000 | 822 | } |
5cc807da MC |
823 | /* else we're in compat mode so we delay flushing until after CCS */ |
824 | } else if (!statem_flush(s)) { | |
825 | return WORK_MORE_A; | |
826 | } | |
827 | ||
38b051a1 | 828 | if (SSL_CONNECTION_IS_DTLS(s)) { |
5cc807da MC |
829 | /* Treat the next message as the first packet */ |
830 | s->first_packet = 1; | |
6cb42265 | 831 | } |
61ae935a MC |
832 | break; |
833 | ||
834 | case TLS_ST_CW_KEY_EXCH: | |
a2c2e000 MC |
835 | if (tls_client_key_exchange_post_work(s) == 0) { |
836 | /* SSLfatal() already called */ | |
61ae935a | 837 | return WORK_ERROR; |
a2c2e000 | 838 | } |
61ae935a MC |
839 | break; |
840 | ||
841 | case TLS_ST_CW_CHANGE: | |
38b051a1 TM |
842 | if (SSL_CONNECTION_IS_TLS13(s) |
843 | || s->hello_retry_request == SSL_HRR_PENDING) | |
4d02f870 | 844 | break; |
066904cc MC |
845 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING |
846 | && s->max_early_data > 0) { | |
847 | /* | |
848 | * We haven't selected TLSv1.3 yet so we don't call the change | |
849 | * cipher state function associated with the SSL_METHOD. Instead | |
850 | * we call tls13_change_cipher_state() directly. | |
851 | */ | |
852 | if (!tls13_change_cipher_state(s, | |
853 | SSL3_CC_EARLY | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
854 | return WORK_ERROR; | |
855 | break; | |
856 | } | |
555cbb32 | 857 | s->session->cipher = s->s3.tmp.new_cipher; |
61ae935a MC |
858 | #ifdef OPENSSL_NO_COMP |
859 | s->session->compress_meth = 0; | |
860 | #else | |
555cbb32 | 861 | if (s->s3.tmp.new_compression == NULL) |
61ae935a MC |
862 | s->session->compress_meth = 0; |
863 | else | |
555cbb32 | 864 | s->session->compress_meth = s->s3.tmp.new_compression->id; |
61ae935a | 865 | #endif |
38b051a1 | 866 | if (!ssl->method->ssl3_enc->setup_key_block(s)) { |
a2c2e000 | 867 | /* SSLfatal() already called */ |
61ae935a | 868 | return WORK_ERROR; |
a2c2e000 | 869 | } |
61ae935a | 870 | |
38b051a1 | 871 | if (!ssl->method->ssl3_enc->change_cipher_state(s, |
a2c2e000 MC |
872 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { |
873 | /* SSLfatal() already called */ | |
61ae935a | 874 | return WORK_ERROR; |
a2c2e000 | 875 | } |
61ae935a | 876 | |
61ae935a | 877 | #ifndef OPENSSL_NO_SCTP |
4897bd20 FWH |
878 | if (SSL_CONNECTION_IS_DTLS(s) && s->hit) { |
879 | /* | |
880 | * Change to new shared key of SCTP-Auth, will be ignored if | |
881 | * no SCTP used. | |
882 | */ | |
883 | BIO_ctrl(SSL_get_wbio(ssl), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
884 | 0, NULL); | |
61ae935a | 885 | } |
4897bd20 | 886 | #endif |
61ae935a MC |
887 | break; |
888 | ||
889 | case TLS_ST_CW_FINISHED: | |
890 | #ifndef OPENSSL_NO_SCTP | |
38b051a1 | 891 | if (wst == WORK_MORE_A && SSL_CONNECTION_IS_DTLS(s) && s->hit == 0) { |
61ae935a MC |
892 | /* |
893 | * Change to new shared key of SCTP-Auth, will be ignored if | |
894 | * no SCTP used. | |
895 | */ | |
38b051a1 | 896 | BIO_ctrl(SSL_get_wbio(ssl), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, |
61ae935a MC |
897 | 0, NULL); |
898 | } | |
899 | #endif | |
900 | if (statem_flush(s) != 1) | |
901 | return WORK_MORE_B; | |
92760c21 | 902 | |
38b051a1 | 903 | if (SSL_CONNECTION_IS_TLS13(s)) { |
9d75dce3 | 904 | if (!tls13_save_handshake_digest_for_pha(s)) { |
a2c2e000 MC |
905 | /* SSLfatal() already called */ |
906 | return WORK_ERROR; | |
907 | } | |
9d75dce3 | 908 | if (s->post_handshake_auth != SSL_PHA_REQUESTED) { |
38b051a1 | 909 | if (!ssl->method->ssl3_enc->change_cipher_state(s, |
9d75dce3 TS |
910 | SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { |
911 | /* SSLfatal() already called */ | |
912 | return WORK_ERROR; | |
913 | } | |
098cfd21 MC |
914 | /* |
915 | * For QUIC we deferred setting up these keys until now so | |
916 | * that we can ensure write keys are always set up before read | |
917 | * keys. | |
918 | */ | |
919 | if (SSL_IS_QUIC_HANDSHAKE(s) | |
920 | && !ssl->method->ssl3_enc->change_cipher_state(s, | |
921 | SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_CLIENT_READ)) { | |
922 | /* SSLfatal() already called */ | |
923 | return WORK_ERROR; | |
924 | } | |
9d75dce3 | 925 | } |
92760c21 | 926 | } |
61ae935a | 927 | break; |
9412b3ad MC |
928 | |
929 | case TLS_ST_CW_KEY_UPDATE: | |
930 | if (statem_flush(s) != 1) | |
931 | return WORK_MORE_A; | |
a2c2e000 MC |
932 | if (!tls13_update_key(s, 1)) { |
933 | /* SSLfatal() already called */ | |
57389a32 | 934 | return WORK_ERROR; |
a2c2e000 | 935 | } |
9412b3ad | 936 | break; |
61ae935a MC |
937 | } |
938 | ||
939 | return WORK_FINISHED_CONTINUE; | |
940 | } | |
941 | ||
942 | /* | |
6392fb8e MC |
943 | * Get the message construction function and message type for sending from the |
944 | * client | |
61ae935a MC |
945 | * |
946 | * Valid return values are: | |
947 | * 1: Success | |
948 | * 0: Error | |
949 | */ | |
38b051a1 | 950 | int ossl_statem_client_construct_message(SSL_CONNECTION *s, |
a15c953f | 951 | confunc_f *confunc, int *mt) |
61ae935a | 952 | { |
d6f1a6e9 | 953 | OSSL_STATEM *st = &s->statem; |
61ae935a | 954 | |
4a01c59f MC |
955 | switch (st->hand_state) { |
956 | default: | |
957 | /* Shouldn't happen */ | |
c48ffbcc | 958 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_HANDSHAKE_STATE); |
4a01c59f MC |
959 | return 0; |
960 | ||
961 | case TLS_ST_CW_CHANGE: | |
38b051a1 | 962 | if (SSL_CONNECTION_IS_DTLS(s)) |
6392fb8e | 963 | *confunc = dtls_construct_change_cipher_spec; |
4a01c59f | 964 | else |
6392fb8e MC |
965 | *confunc = tls_construct_change_cipher_spec; |
966 | *mt = SSL3_MT_CHANGE_CIPHER_SPEC; | |
4a01c59f MC |
967 | break; |
968 | ||
969 | case TLS_ST_CW_CLNT_HELLO: | |
6392fb8e MC |
970 | *confunc = tls_construct_client_hello; |
971 | *mt = SSL3_MT_CLIENT_HELLO; | |
4a01c59f MC |
972 | break; |
973 | ||
ef6c191b MC |
974 | case TLS_ST_CW_END_OF_EARLY_DATA: |
975 | *confunc = tls_construct_end_of_early_data; | |
976 | *mt = SSL3_MT_END_OF_EARLY_DATA; | |
977 | break; | |
978 | ||
979 | case TLS_ST_PENDING_EARLY_DATA_END: | |
980 | *confunc = NULL; | |
981 | *mt = SSL3_MT_DUMMY; | |
982 | break; | |
983 | ||
4a01c59f | 984 | case TLS_ST_CW_CERT: |
6392fb8e MC |
985 | *confunc = tls_construct_client_certificate; |
986 | *mt = SSL3_MT_CERTIFICATE; | |
4a01c59f MC |
987 | break; |
988 | ||
b67cb09f TS |
989 | #ifndef OPENSSL_NO_COMP_ALG |
990 | case TLS_ST_CW_COMP_CERT: | |
991 | *confunc = tls_construct_client_compressed_certificate; | |
992 | *mt = SSL3_MT_COMPRESSED_CERTIFICATE; | |
993 | break; | |
994 | #endif | |
995 | ||
4a01c59f | 996 | case TLS_ST_CW_KEY_EXCH: |
6392fb8e MC |
997 | *confunc = tls_construct_client_key_exchange; |
998 | *mt = SSL3_MT_CLIENT_KEY_EXCHANGE; | |
4a01c59f MC |
999 | break; |
1000 | ||
1001 | case TLS_ST_CW_CERT_VRFY: | |
d8bc1399 | 1002 | *confunc = tls_construct_cert_verify; |
6392fb8e | 1003 | *mt = SSL3_MT_CERTIFICATE_VERIFY; |
4a01c59f | 1004 | break; |
61ae935a MC |
1005 | |
1006 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
4a01c59f | 1007 | case TLS_ST_CW_NEXT_PROTO: |
6392fb8e MC |
1008 | *confunc = tls_construct_next_proto; |
1009 | *mt = SSL3_MT_NEXT_PROTO; | |
4a01c59f | 1010 | break; |
61ae935a | 1011 | #endif |
4a01c59f | 1012 | case TLS_ST_CW_FINISHED: |
6392fb8e MC |
1013 | *confunc = tls_construct_finished; |
1014 | *mt = SSL3_MT_FINISHED; | |
4a01c59f | 1015 | break; |
9412b3ad MC |
1016 | |
1017 | case TLS_ST_CW_KEY_UPDATE: | |
1018 | *confunc = tls_construct_key_update; | |
1019 | *mt = SSL3_MT_KEY_UPDATE; | |
1020 | break; | |
4a01c59f | 1021 | } |
5923ad4b | 1022 | |
5923ad4b | 1023 | return 1; |
61ae935a MC |
1024 | } |
1025 | ||
1026 | /* | |
1027 | * Returns the maximum allowed length for the current message that we are | |
1028 | * reading. Excludes the message header. | |
1029 | */ | |
38b051a1 | 1030 | size_t ossl_statem_client_max_message_size(SSL_CONNECTION *s) |
61ae935a | 1031 | { |
d6f1a6e9 | 1032 | OSSL_STATEM *st = &s->statem; |
61ae935a | 1033 | |
a230b26e | 1034 | switch (st->hand_state) { |
f3b3d7f0 RS |
1035 | default: |
1036 | /* Shouldn't happen */ | |
1037 | return 0; | |
1038 | ||
a230b26e EK |
1039 | case TLS_ST_CR_SRVR_HELLO: |
1040 | return SERVER_HELLO_MAX_LENGTH; | |
61ae935a | 1041 | |
a230b26e EK |
1042 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
1043 | return HELLO_VERIFY_REQUEST_MAX_LENGTH; | |
61ae935a | 1044 | |
b67cb09f | 1045 | case TLS_ST_CR_COMP_CERT: |
a230b26e EK |
1046 | case TLS_ST_CR_CERT: |
1047 | return s->max_cert_list; | |
61ae935a | 1048 | |
2c5dfdc3 | 1049 | case TLS_ST_CR_CERT_VRFY: |
c6d14bfd | 1050 | return CERTIFICATE_VERIFY_MAX_LENGTH; |
2c5dfdc3 | 1051 | |
a230b26e EK |
1052 | case TLS_ST_CR_CERT_STATUS: |
1053 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 1054 | |
a230b26e EK |
1055 | case TLS_ST_CR_KEY_EXCH: |
1056 | return SERVER_KEY_EXCH_MAX_LENGTH; | |
61ae935a | 1057 | |
a230b26e EK |
1058 | case TLS_ST_CR_CERT_REQ: |
1059 | /* | |
1060 | * Set to s->max_cert_list for compatibility with previous releases. In | |
1061 | * practice these messages can get quite long if servers are configured | |
1062 | * to provide a long list of acceptable CAs | |
1063 | */ | |
1064 | return s->max_cert_list; | |
61ae935a | 1065 | |
a230b26e EK |
1066 | case TLS_ST_CR_SRVR_DONE: |
1067 | return SERVER_HELLO_DONE_MAX_LENGTH; | |
61ae935a | 1068 | |
a230b26e EK |
1069 | case TLS_ST_CR_CHANGE: |
1070 | if (s->version == DTLS1_BAD_VER) | |
1071 | return 3; | |
1072 | return CCS_MAX_LENGTH; | |
61ae935a | 1073 | |
a230b26e | 1074 | case TLS_ST_CR_SESSION_TICKET: |
38b051a1 TM |
1075 | return (SSL_CONNECTION_IS_TLS13(s)) ? SESSION_TICKET_MAX_LENGTH_TLS13 |
1076 | : SESSION_TICKET_MAX_LENGTH_TLS12; | |
61ae935a | 1077 | |
a230b26e EK |
1078 | case TLS_ST_CR_FINISHED: |
1079 | return FINISHED_MAX_LENGTH; | |
e46f2334 MC |
1080 | |
1081 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
1082 | return ENCRYPTED_EXTENSIONS_MAX_LENGTH; | |
e1c3de44 MC |
1083 | |
1084 | case TLS_ST_CR_KEY_UPDATE: | |
1085 | return KEY_UPDATE_MAX_LENGTH; | |
61ae935a | 1086 | } |
61ae935a MC |
1087 | } |
1088 | ||
1089 | /* | |
0c3eb279 | 1090 | * Process a message that the client has received from the server. |
61ae935a | 1091 | */ |
38b051a1 TM |
1092 | MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL_CONNECTION *s, |
1093 | PACKET *pkt) | |
61ae935a | 1094 | { |
d6f1a6e9 | 1095 | OSSL_STATEM *st = &s->statem; |
61ae935a | 1096 | |
a230b26e | 1097 | switch (st->hand_state) { |
f3b3d7f0 RS |
1098 | default: |
1099 | /* Shouldn't happen */ | |
c48ffbcc | 1100 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3b3d7f0 RS |
1101 | return MSG_PROCESS_ERROR; |
1102 | ||
a230b26e EK |
1103 | case TLS_ST_CR_SRVR_HELLO: |
1104 | return tls_process_server_hello(s, pkt); | |
61ae935a | 1105 | |
a230b26e EK |
1106 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
1107 | return dtls_process_hello_verify(s, pkt); | |
61ae935a | 1108 | |
a230b26e EK |
1109 | case TLS_ST_CR_CERT: |
1110 | return tls_process_server_certificate(s, pkt); | |
61ae935a | 1111 | |
b67cb09f TS |
1112 | #ifndef OPENSSL_NO_COMP_ALG |
1113 | case TLS_ST_CR_COMP_CERT: | |
1114 | return tls_process_server_compressed_certificate(s, pkt); | |
1115 | #endif | |
1116 | ||
2c5dfdc3 MC |
1117 | case TLS_ST_CR_CERT_VRFY: |
1118 | return tls_process_cert_verify(s, pkt); | |
1119 | ||
a230b26e EK |
1120 | case TLS_ST_CR_CERT_STATUS: |
1121 | return tls_process_cert_status(s, pkt); | |
61ae935a | 1122 | |
a230b26e EK |
1123 | case TLS_ST_CR_KEY_EXCH: |
1124 | return tls_process_key_exchange(s, pkt); | |
61ae935a | 1125 | |
a230b26e EK |
1126 | case TLS_ST_CR_CERT_REQ: |
1127 | return tls_process_certificate_request(s, pkt); | |
61ae935a | 1128 | |
a230b26e EK |
1129 | case TLS_ST_CR_SRVR_DONE: |
1130 | return tls_process_server_done(s, pkt); | |
61ae935a | 1131 | |
a230b26e EK |
1132 | case TLS_ST_CR_CHANGE: |
1133 | return tls_process_change_cipher_spec(s, pkt); | |
61ae935a | 1134 | |
a230b26e EK |
1135 | case TLS_ST_CR_SESSION_TICKET: |
1136 | return tls_process_new_session_ticket(s, pkt); | |
61ae935a | 1137 | |
a230b26e EK |
1138 | case TLS_ST_CR_FINISHED: |
1139 | return tls_process_finished(s, pkt); | |
e46f2334 | 1140 | |
c7f47786 MC |
1141 | case TLS_ST_CR_HELLO_REQ: |
1142 | return tls_process_hello_req(s, pkt); | |
1143 | ||
e46f2334 MC |
1144 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: |
1145 | return tls_process_encrypted_extensions(s, pkt); | |
e1c3de44 MC |
1146 | |
1147 | case TLS_ST_CR_KEY_UPDATE: | |
1148 | return tls_process_key_update(s, pkt); | |
61ae935a | 1149 | } |
61ae935a MC |
1150 | } |
1151 | ||
1152 | /* | |
1153 | * Perform any further processing required following the receipt of a message | |
1154 | * from the server | |
1155 | */ | |
38b051a1 TM |
1156 | WORK_STATE ossl_statem_client_post_process_message(SSL_CONNECTION *s, |
1157 | WORK_STATE wst) | |
61ae935a | 1158 | { |
d6f1a6e9 | 1159 | OSSL_STATEM *st = &s->statem; |
61ae935a | 1160 | |
a230b26e | 1161 | switch (st->hand_state) { |
f3b3d7f0 RS |
1162 | default: |
1163 | /* Shouldn't happen */ | |
c48ffbcc | 1164 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3b3d7f0 RS |
1165 | return WORK_ERROR; |
1166 | ||
0c3eb279 | 1167 | case TLS_ST_CR_CERT: |
b67cb09f | 1168 | case TLS_ST_CR_COMP_CERT: |
0c3eb279 DDO |
1169 | return tls_post_process_server_certificate(s, wst); |
1170 | ||
e4562014 | 1171 | case TLS_ST_CR_CERT_VRFY: |
05c4f1d5 MC |
1172 | case TLS_ST_CR_CERT_REQ: |
1173 | return tls_prepare_client_certificate(s, wst); | |
61ae935a | 1174 | } |
61ae935a MC |
1175 | } |
1176 | ||
67ec6d2b | 1177 | CON_FUNC_RETURN tls_construct_client_hello(SSL_CONNECTION *s, WPACKET *pkt) |
0f113f3e | 1178 | { |
2c7b4dbc | 1179 | unsigned char *p; |
ec60ccc1 MC |
1180 | size_t sess_id_len; |
1181 | int i, protverr; | |
09b6c2ef | 1182 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
1183 | SSL_COMP *comp; |
1184 | #endif | |
b9908bf9 | 1185 | SSL_SESSION *sess = s->session; |
a5816a5a | 1186 | unsigned char *session_id; |
38b051a1 | 1187 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
0f113f3e | 1188 | |
b9908bf9 | 1189 | /* Work out what SSL/TLS/DTLS version to use */ |
4fa52141 VD |
1190 | protverr = ssl_set_client_hello_version(s); |
1191 | if (protverr != 0) { | |
c48ffbcc | 1192 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, protverr); |
67ec6d2b | 1193 | return CON_FUNC_ERROR; |
4fa52141 | 1194 | } |
0f113f3e | 1195 | |
e586eac8 | 1196 | if (sess == NULL |
4fd12788 | 1197 | || !ssl_version_supported(s, sess->ssl_version, NULL) |
e586eac8 | 1198 | || !SSL_SESSION_is_resumable(sess)) { |
fc7129dc MC |
1199 | if (s->hello_retry_request == SSL_HRR_NONE |
1200 | && !ssl_get_new_session(s, 0)) { | |
f63a17d6 | 1201 | /* SSLfatal() already called */ |
67ec6d2b | 1202 | return CON_FUNC_ERROR; |
f63a17d6 | 1203 | } |
b9908bf9 MC |
1204 | } |
1205 | /* else use the pre-loaded session */ | |
0f113f3e | 1206 | |
555cbb32 | 1207 | p = s->s3.client_random; |
0f113f3e | 1208 | |
b9908bf9 MC |
1209 | /* |
1210 | * for DTLS if client_random is initialized, reuse it, we are | |
1211 | * required to use same upon reply to HelloVerify | |
1212 | */ | |
38b051a1 | 1213 | if (SSL_CONNECTION_IS_DTLS(s)) { |
b9908bf9 MC |
1214 | size_t idx; |
1215 | i = 1; | |
555cbb32 | 1216 | for (idx = 0; idx < sizeof(s->s3.client_random); idx++) { |
b9908bf9 MC |
1217 | if (p[idx]) { |
1218 | i = 0; | |
1219 | break; | |
0f113f3e | 1220 | } |
0f113f3e | 1221 | } |
751b26b1 | 1222 | } else { |
fc7129dc | 1223 | i = (s->hello_retry_request == SSL_HRR_NONE); |
751b26b1 | 1224 | } |
0f113f3e | 1225 | |
555cbb32 | 1226 | if (i && ssl_fill_hello_random(s, 0, p, sizeof(s->s3.client_random), |
f63a17d6 | 1227 | DOWNGRADE_NONE) <= 0) { |
c48ffbcc | 1228 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1229 | return CON_FUNC_ERROR; |
f63a17d6 | 1230 | } |
b9908bf9 | 1231 | |
b9908bf9 MC |
1232 | /*- |
1233 | * version indicates the negotiated version: for example from | |
1234 | * an SSLv2/v3 compatible client hello). The client_version | |
1235 | * field is the maximum version we permit and it is also | |
1236 | * used in RSA encrypted premaster secrets. Some servers can | |
1237 | * choke if we initially report a higher version then | |
1238 | * renegotiate to a lower one in the premaster secret. This | |
1239 | * didn't happen with TLS 1.0 as most servers supported it | |
1240 | * but it can with TLS 1.1 or later if the server only supports | |
1241 | * 1.0. | |
1242 | * | |
1243 | * Possible scenario with previous logic: | |
1244 | * 1. Client hello indicates TLS 1.2 | |
1245 | * 2. Server hello says TLS 1.0 | |
1246 | * 3. RSA encrypted premaster secret uses 1.2. | |
8483a003 | 1247 | * 4. Handshake proceeds using TLS 1.0. |
b9908bf9 MC |
1248 | * 5. Server sends hello request to renegotiate. |
1249 | * 6. Client hello indicates TLS v1.0 as we now | |
1250 | * know that is maximum server supports. | |
1251 | * 7. Server chokes on RSA encrypted premaster secret | |
1252 | * containing version 1.0. | |
1253 | * | |
1254 | * For interoperability it should be OK to always use the | |
1255 | * maximum version we support in client hello and then rely | |
1256 | * on the checking of version to ensure the servers isn't | |
1257 | * being inconsistent: for example initially negotiating with | |
1258 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
1259 | * client_version in client hello and not resetting it to | |
1260 | * the negotiated version. | |
cd998837 MC |
1261 | * |
1262 | * For TLS 1.3 we always set the ClientHello version to 1.2 and rely on the | |
16bce0e0 | 1263 | * supported_versions extension for the real supported versions. |
b9908bf9 | 1264 | */ |
7acb8b64 | 1265 | if (!WPACKET_put_bytes_u16(pkt, s->client_version) |
555cbb32 | 1266 | || !WPACKET_memcpy(pkt, s->s3.client_random, SSL3_RANDOM_SIZE)) { |
c48ffbcc | 1267 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1268 | return CON_FUNC_ERROR; |
2c7b4dbc | 1269 | } |
b9908bf9 MC |
1270 | |
1271 | /* Session ID */ | |
a5816a5a MC |
1272 | session_id = s->session->session_id; |
1273 | if (s->new_session || s->session->ssl_version == TLS1_3_VERSION) { | |
1274 | if (s->version == TLS1_3_VERSION | |
1275 | && (s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0) { | |
1276 | sess_id_len = sizeof(s->tmp_session_id); | |
1277 | s->tmp_session_id_len = sess_id_len; | |
1278 | session_id = s->tmp_session_id; | |
fc7129dc | 1279 | if (s->hello_retry_request == SSL_HRR_NONE |
38b051a1 | 1280 | && RAND_bytes_ex(sctx->libctx, s->tmp_session_id, |
0f8815aa | 1281 | sess_id_len, 0) <= 0) { |
c48ffbcc | 1282 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1283 | return CON_FUNC_ERROR; |
a5816a5a MC |
1284 | } |
1285 | } else { | |
1286 | sess_id_len = 0; | |
1287 | } | |
1288 | } else { | |
dee0cc10 | 1289 | assert(s->session->session_id_length <= sizeof(s->session->session_id)); |
ec60ccc1 | 1290 | sess_id_len = s->session->session_id_length; |
a5816a5a MC |
1291 | if (s->version == TLS1_3_VERSION) { |
1292 | s->tmp_session_id_len = sess_id_len; | |
1293 | memcpy(s->tmp_session_id, s->session->session_id, sess_id_len); | |
1294 | } | |
1295 | } | |
dee0cc10 | 1296 | if (!WPACKET_start_sub_packet_u8(pkt) |
a5816a5a | 1297 | || (sess_id_len != 0 && !WPACKET_memcpy(pkt, session_id, |
ec60ccc1 | 1298 | sess_id_len)) |
7cea05dc | 1299 | || !WPACKET_close(pkt)) { |
c48ffbcc | 1300 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1301 | return CON_FUNC_ERROR; |
b9908bf9 | 1302 | } |
0f113f3e | 1303 | |
b9908bf9 | 1304 | /* cookie stuff for DTLS */ |
38b051a1 | 1305 | if (SSL_CONNECTION_IS_DTLS(s)) { |
2c7b4dbc | 1306 | if (s->d1->cookie_len > sizeof(s->d1->cookie) |
7cea05dc | 1307 | || !WPACKET_sub_memcpy_u8(pkt, s->d1->cookie, |
b2b3024e | 1308 | s->d1->cookie_len)) { |
c48ffbcc | 1309 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1310 | return CON_FUNC_ERROR; |
0f113f3e | 1311 | } |
b9908bf9 MC |
1312 | } |
1313 | ||
1314 | /* Ciphers supported */ | |
7cea05dc | 1315 | if (!WPACKET_start_sub_packet_u16(pkt)) { |
c48ffbcc | 1316 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1317 | return CON_FUNC_ERROR; |
2c7b4dbc | 1318 | } |
635c8f77 | 1319 | |
38b051a1 TM |
1320 | if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(SSL_CONNECTION_GET_SSL(s)), |
1321 | pkt)) { | |
f63a17d6 | 1322 | /* SSLfatal() already called */ |
67ec6d2b | 1323 | return CON_FUNC_ERROR; |
f63a17d6 | 1324 | } |
7cea05dc | 1325 | if (!WPACKET_close(pkt)) { |
c48ffbcc | 1326 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1327 | return CON_FUNC_ERROR; |
b9908bf9 | 1328 | } |
0f113f3e | 1329 | |
b9908bf9 | 1330 | /* COMPRESSION */ |
7cea05dc | 1331 | if (!WPACKET_start_sub_packet_u8(pkt)) { |
c48ffbcc | 1332 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1333 | return CON_FUNC_ERROR; |
2c7b4dbc MC |
1334 | } |
1335 | #ifndef OPENSSL_NO_COMP | |
c19602b5 | 1336 | if (ssl_allow_compression(s) |
38b051a1 TM |
1337 | && sctx->comp_methods |
1338 | && (SSL_CONNECTION_IS_DTLS(s) | |
1339 | || s->s3.tmp.max_ver < TLS1_3_VERSION)) { | |
1340 | int compnum = sk_SSL_COMP_num(sctx->comp_methods); | |
2c7b4dbc | 1341 | for (i = 0; i < compnum; i++) { |
38b051a1 | 1342 | comp = sk_SSL_COMP_value(sctx->comp_methods, i); |
7cea05dc | 1343 | if (!WPACKET_put_bytes_u8(pkt, comp->id)) { |
c48ffbcc | 1344 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1345 | return CON_FUNC_ERROR; |
2c7b4dbc MC |
1346 | } |
1347 | } | |
b9908bf9 | 1348 | } |
09b6c2ef | 1349 | #endif |
2c7b4dbc | 1350 | /* Add the NULL method */ |
7cea05dc | 1351 | if (!WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_close(pkt)) { |
c48ffbcc | 1352 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1353 | return CON_FUNC_ERROR; |
2c7b4dbc | 1354 | } |
761772d7 | 1355 | |
b9908bf9 | 1356 | /* TLS extensions */ |
f63a17d6 MC |
1357 | if (!tls_construct_extensions(s, pkt, SSL_EXT_CLIENT_HELLO, NULL, 0)) { |
1358 | /* SSLfatal() already called */ | |
67ec6d2b | 1359 | return CON_FUNC_ERROR; |
b9908bf9 | 1360 | } |
0f113f3e | 1361 | |
67ec6d2b | 1362 | return CON_FUNC_SUCCESS; |
0f113f3e | 1363 | } |
d02b48c6 | 1364 | |
38b051a1 | 1365 | MSG_PROCESS_RETURN dtls_process_hello_verify(SSL_CONNECTION *s, PACKET *pkt) |
8ba708e5 | 1366 | { |
cb150cbc | 1367 | size_t cookie_len; |
8ba708e5 MC |
1368 | PACKET cookiepkt; |
1369 | ||
1370 | if (!PACKET_forward(pkt, 2) | |
a230b26e | 1371 | || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) { |
c48ffbcc | 1372 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 1373 | return MSG_PROCESS_ERROR; |
8ba708e5 MC |
1374 | } |
1375 | ||
1376 | cookie_len = PACKET_remaining(&cookiepkt); | |
1377 | if (cookie_len > sizeof(s->d1->cookie)) { | |
c48ffbcc | 1378 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_LENGTH_TOO_LONG); |
f63a17d6 | 1379 | return MSG_PROCESS_ERROR; |
8ba708e5 MC |
1380 | } |
1381 | ||
1382 | if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) { | |
c48ffbcc | 1383 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 1384 | return MSG_PROCESS_ERROR; |
8ba708e5 MC |
1385 | } |
1386 | s->d1->cookie_len = cookie_len; | |
1387 | ||
1388 | return MSG_PROCESS_FINISHED_READING; | |
8ba708e5 MC |
1389 | } |
1390 | ||
38b051a1 TM |
1391 | static int set_client_ciphersuite(SSL_CONNECTION *s, |
1392 | const unsigned char *cipherchars) | |
b9908bf9 MC |
1393 | { |
1394 | STACK_OF(SSL_CIPHER) *sk; | |
1395 | const SSL_CIPHER *c; | |
11c67eea | 1396 | int i; |
38b051a1 | 1397 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
11c67eea MC |
1398 | |
1399 | c = ssl_get_cipher_by_char(s, cipherchars, 0); | |
1400 | if (c == NULL) { | |
1401 | /* unknown cipher */ | |
c48ffbcc | 1402 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_UNKNOWN_CIPHER_RETURNED); |
11c67eea MC |
1403 | return 0; |
1404 | } | |
1405 | /* | |
1406 | * If it is a disabled cipher we either didn't send it in client hello, | |
1407 | * or it's not allowed for the selected protocol. So we return an error. | |
1408 | */ | |
8af91fd9 | 1409 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK, 1)) { |
c48ffbcc | 1410 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CIPHER_RETURNED); |
11c67eea MC |
1411 | return 0; |
1412 | } | |
1413 | ||
1414 | sk = ssl_get_ciphers_by_id(s); | |
1415 | i = sk_SSL_CIPHER_find(sk, c); | |
1416 | if (i < 0) { | |
1417 | /* we did not say we would use this cipher */ | |
c48ffbcc | 1418 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CIPHER_RETURNED); |
11c67eea MC |
1419 | return 0; |
1420 | } | |
1421 | ||
38b051a1 | 1422 | if (SSL_CONNECTION_IS_TLS13(s) && s->s3.tmp.new_cipher != NULL |
555cbb32 | 1423 | && s->s3.tmp.new_cipher->id != c->id) { |
11c67eea | 1424 | /* ServerHello selected a different ciphersuite to that in the HRR */ |
c48ffbcc | 1425 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CIPHER_RETURNED); |
11c67eea MC |
1426 | return 0; |
1427 | } | |
1428 | ||
1429 | /* | |
1430 | * Depending on the session caching (internal/external), the cipher | |
1431 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
1432 | * set and use it for comparison. | |
1433 | */ | |
1434 | if (s->session->cipher != NULL) | |
1435 | s->session->cipher_id = s->session->cipher->id; | |
1436 | if (s->hit && (s->session->cipher_id != c->id)) { | |
38b051a1 TM |
1437 | if (SSL_CONNECTION_IS_TLS13(s)) { |
1438 | const EVP_MD *md = ssl_md(sctx, c->algorithm2); | |
b740012f | 1439 | |
9890cc42 AF |
1440 | if (!ossl_assert(s->session->cipher != NULL)) { |
1441 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
1442 | return 0; | |
1443 | } | |
a055a881 MC |
1444 | /* |
1445 | * In TLSv1.3 it is valid for the server to select a different | |
1446 | * ciphersuite as long as the hash is the same. | |
1447 | */ | |
b740012f | 1448 | if (md == NULL |
38b051a1 | 1449 | || md != ssl_md(sctx, s->session->cipher->algorithm2)) { |
f63a17d6 | 1450 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 | 1451 | SSL_R_CIPHERSUITE_DIGEST_HAS_CHANGED); |
a055a881 MC |
1452 | return 0; |
1453 | } | |
1454 | } else { | |
1455 | /* | |
1456 | * Prior to TLSv1.3 resuming a session always meant using the same | |
1457 | * ciphersuite. | |
1458 | */ | |
c48ffbcc | 1459 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 | 1460 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); |
a055a881 MC |
1461 | return 0; |
1462 | } | |
11c67eea | 1463 | } |
555cbb32 | 1464 | s->s3.tmp.new_cipher = c; |
11c67eea MC |
1465 | |
1466 | return 1; | |
1467 | } | |
1468 | ||
38b051a1 | 1469 | MSG_PROCESS_RETURN tls_process_server_hello(SSL_CONNECTION *s, PACKET *pkt) |
11c67eea | 1470 | { |
332eb390 | 1471 | PACKET session_id, extpkt; |
b9908bf9 | 1472 | size_t session_id_len; |
b6981744 | 1473 | const unsigned char *cipherchars; |
597c51bc | 1474 | int hrr = 0; |
b9908bf9 | 1475 | unsigned int compression; |
4fa52141 | 1476 | unsigned int sversion; |
3434f40b | 1477 | unsigned int context; |
332eb390 | 1478 | RAW_EXTENSION *extensions = NULL; |
38b051a1 | 1479 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
dc84829c | 1480 | SSL *ussl = SSL_CONNECTION_GET_USER_SSL(s); |
b9908bf9 MC |
1481 | #ifndef OPENSSL_NO_COMP |
1482 | SSL_COMP *comp; | |
1483 | #endif | |
1484 | ||
4fa52141 | 1485 | if (!PACKET_get_net_2(pkt, &sversion)) { |
c48ffbcc | 1486 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 1487 | goto err; |
4fa52141 | 1488 | } |
50932c4a | 1489 | |
c3043dcd | 1490 | /* load the server random */ |
597c51bc MC |
1491 | if (s->version == TLS1_3_VERSION |
1492 | && sversion == TLS1_2_VERSION | |
1493 | && PACKET_remaining(pkt) >= SSL3_RANDOM_SIZE | |
1494 | && memcmp(hrrrandom, PACKET_data(pkt), SSL3_RANDOM_SIZE) == 0) { | |
d204a50b TM |
1495 | if (s->hello_retry_request != SSL_HRR_NONE) { |
1496 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_R_UNEXPECTED_MESSAGE); | |
1497 | goto err; | |
1498 | } | |
fc7129dc | 1499 | s->hello_retry_request = SSL_HRR_PENDING; |
9cd9e097 | 1500 | /* Tell the record layer that we know we're going to get TLSv1.3 */ |
1d367677 MC |
1501 | if (!ssl_set_record_protocol_version(s, s->version)) { |
1502 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
1503 | goto err; | |
1504 | } | |
fc7129dc | 1505 | hrr = 1; |
597c51bc | 1506 | if (!PACKET_forward(pkt, SSL3_RANDOM_SIZE)) { |
c48ffbcc | 1507 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
597c51bc MC |
1508 | goto err; |
1509 | } | |
1510 | } else { | |
555cbb32 | 1511 | if (!PACKET_copy_bytes(pkt, s->s3.server_random, SSL3_RANDOM_SIZE)) { |
c48ffbcc | 1512 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
597c51bc MC |
1513 | goto err; |
1514 | } | |
c3043dcd MC |
1515 | } |
1516 | ||
88050dd1 MC |
1517 | /* Get the session-id. */ |
1518 | if (!PACKET_get_length_prefixed_1(pkt, &session_id)) { | |
c48ffbcc | 1519 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 1520 | goto err; |
0f113f3e | 1521 | } |
88050dd1 MC |
1522 | session_id_len = PACKET_remaining(&session_id); |
1523 | if (session_id_len > sizeof(s->session->session_id) | |
1524 | || session_id_len > SSL3_SESSION_ID_SIZE) { | |
c48ffbcc | 1525 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_SSL3_SESSION_ID_TOO_LONG); |
f63a17d6 | 1526 | goto err; |
524420d8 MC |
1527 | } |
1528 | ||
73999b62 | 1529 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
c48ffbcc | 1530 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 1531 | goto err; |
fc5ce51d EK |
1532 | } |
1533 | ||
88050dd1 | 1534 | if (!PACKET_get_1(pkt, &compression)) { |
c48ffbcc | 1535 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
88050dd1 | 1536 | goto err; |
4ff65f77 MC |
1537 | } |
1538 | ||
1539 | /* TLS extensions */ | |
597c51bc | 1540 | if (PACKET_remaining(pkt) == 0 && !hrr) { |
4ff65f77 | 1541 | PACKET_null_init(&extpkt); |
26b9172a MC |
1542 | } else if (!PACKET_as_length_prefixed_2(pkt, &extpkt) |
1543 | || PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 1544 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_LENGTH); |
f63a17d6 | 1545 | goto err; |
4ff65f77 MC |
1546 | } |
1547 | ||
597c51bc MC |
1548 | if (!hrr) { |
1549 | if (!tls_collect_extensions(s, &extpkt, | |
1550 | SSL_EXT_TLS1_2_SERVER_HELLO | |
1551 | | SSL_EXT_TLS1_3_SERVER_HELLO, | |
1552 | &extensions, NULL, 1)) { | |
1553 | /* SSLfatal() already called */ | |
1554 | goto err; | |
1555 | } | |
1556 | ||
1557 | if (!ssl_choose_client_version(s, sversion, extensions)) { | |
1558 | /* SSLfatal() already called */ | |
1559 | goto err; | |
1560 | } | |
88050dd1 MC |
1561 | } |
1562 | ||
38b051a1 | 1563 | if (SSL_CONNECTION_IS_TLS13(s) || hrr) { |
597c51bc MC |
1564 | if (compression != 0) { |
1565 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, | |
597c51bc MC |
1566 | SSL_R_INVALID_COMPRESSION_ALGORITHM); |
1567 | goto err; | |
1568 | } | |
1569 | ||
1570 | if (session_id_len != s->tmp_session_id_len | |
1571 | || memcmp(PACKET_data(&session_id), s->tmp_session_id, | |
1572 | session_id_len) != 0) { | |
c48ffbcc | 1573 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_INVALID_SESSION_ID); |
597c51bc MC |
1574 | goto err; |
1575 | } | |
1576 | } | |
1577 | ||
1578 | if (hrr) { | |
1579 | if (!set_client_ciphersuite(s, cipherchars)) { | |
1580 | /* SSLfatal() already called */ | |
1581 | goto err; | |
1582 | } | |
1583 | ||
1584 | return tls_process_as_hello_retry_request(s, &extpkt); | |
88050dd1 MC |
1585 | } |
1586 | ||
1587 | /* | |
1588 | * Now we have chosen the version we need to check again that the extensions | |
1589 | * are appropriate for this version. | |
1590 | */ | |
38b051a1 TM |
1591 | context = SSL_CONNECTION_IS_TLS13(s) ? SSL_EXT_TLS1_3_SERVER_HELLO |
1592 | : SSL_EXT_TLS1_2_SERVER_HELLO; | |
88050dd1 | 1593 | if (!tls_validate_all_contexts(s, context, extensions)) { |
c48ffbcc | 1594 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_EXTENSION); |
88050dd1 MC |
1595 | goto err; |
1596 | } | |
1597 | ||
4ff65f77 MC |
1598 | s->hit = 0; |
1599 | ||
38b051a1 | 1600 | if (SSL_CONNECTION_IS_TLS13(s)) { |
a5816a5a MC |
1601 | /* |
1602 | * In TLSv1.3 a ServerHello message signals a key change so the end of | |
1603 | * the message must be on a record boundary. | |
1604 | */ | |
1605 | if (RECORD_LAYER_processed_read_pending(&s->rlayer)) { | |
1606 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, | |
a5816a5a MC |
1607 | SSL_R_NOT_ON_RECORD_BOUNDARY); |
1608 | goto err; | |
1609 | } | |
1610 | ||
4ff65f77 MC |
1611 | /* This will set s->hit if we are resuming */ |
1612 | if (!tls_parse_extension(s, TLSEXT_IDX_psk, | |
fe874d27 | 1613 | SSL_EXT_TLS1_3_SERVER_HELLO, |
88050dd1 | 1614 | extensions, NULL, 0)) { |
f63a17d6 MC |
1615 | /* SSLfatal() already called */ |
1616 | goto err; | |
1617 | } | |
4ff65f77 | 1618 | } else { |
8c1a5343 | 1619 | /* |
4ff65f77 MC |
1620 | * Check if we can resume the session based on external pre-shared |
1621 | * secret. EAP-FAST (RFC 4851) supports two types of session resumption. | |
1622 | * Resumption based on server-side state works with session IDs. | |
1623 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
1624 | * works by overriding the SessionTicket extension at the application | |
1625 | * layer, and does not send a session ID. (We do not know whether | |
1626 | * EAP-FAST servers would honour the session ID.) Therefore, the session | |
1627 | * ID alone is not a reliable indicator of session resumption, so we | |
1628 | * first check if we can resume, and later peek at the next handshake | |
1629 | * message to see if the server wants to resume. | |
8c1a5343 | 1630 | */ |
4ff65f77 MC |
1631 | if (s->version >= TLS1_VERSION |
1632 | && s->ext.session_secret_cb != NULL && s->session->ext.tick) { | |
1633 | const SSL_CIPHER *pref_cipher = NULL; | |
1634 | /* | |
1635 | * s->session->master_key_length is a size_t, but this is an int for | |
1636 | * backwards compat reasons | |
1637 | */ | |
1638 | int master_key_length; | |
38b051a1 | 1639 | |
4ff65f77 | 1640 | master_key_length = sizeof(s->session->master_key); |
dc84829c | 1641 | if (s->ext.session_secret_cb(ussl, s->session->master_key, |
4ff65f77 MC |
1642 | &master_key_length, |
1643 | NULL, &pref_cipher, | |
1644 | s->ext.session_secret_cb_arg) | |
1645 | && master_key_length > 0) { | |
1646 | s->session->master_key_length = master_key_length; | |
1647 | s->session->cipher = pref_cipher ? | |
60d685d1 | 1648 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars, 0); |
4ff65f77 | 1649 | } else { |
c48ffbcc | 1650 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f63a17d6 | 1651 | goto err; |
4ff65f77 | 1652 | } |
0f113f3e | 1653 | } |
4ff65f77 MC |
1654 | |
1655 | if (session_id_len != 0 | |
1656 | && session_id_len == s->session->session_id_length | |
1657 | && memcmp(PACKET_data(&session_id), s->session->session_id, | |
1658 | session_id_len) == 0) | |
1659 | s->hit = 1; | |
50932c4a MC |
1660 | } |
1661 | ||
4ff65f77 | 1662 | if (s->hit) { |
0f113f3e | 1663 | if (s->sid_ctx_length != s->session->sid_ctx_length |
4ff65f77 | 1664 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { |
0f113f3e | 1665 | /* actually a client application bug */ |
f63a17d6 | 1666 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 MC |
1667 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); |
1668 | goto err; | |
0f113f3e | 1669 | } |
6e3d0153 | 1670 | } else { |
0f113f3e | 1671 | /* |
6e3d0153 | 1672 | * If we were trying for session-id reuse but the server |
4ff65f77 | 1673 | * didn't resume, make a new SSL_SESSION. |
6e3d0153 EK |
1674 | * In the case of EAP-FAST and PAC, we do not send a session ID, |
1675 | * so the PAC-based session secret is always preserved. It'll be | |
1676 | * overwritten if the server refuses resumption. | |
0f113f3e | 1677 | */ |
c96ce52c | 1678 | if (s->session->session_id_length > 0) { |
acce0557 | 1679 | ssl_tsan_counter(s->session_ctx, &s->session_ctx->stats.sess_miss); |
0f113f3e | 1680 | if (!ssl_get_new_session(s, 0)) { |
f63a17d6 MC |
1681 | /* SSLfatal() already called */ |
1682 | goto err; | |
0f113f3e MC |
1683 | } |
1684 | } | |
50932c4a | 1685 | |
ccae4a15 | 1686 | s->session->ssl_version = s->version; |
a5816a5a MC |
1687 | /* |
1688 | * In TLSv1.2 and below we save the session id we were sent so we can | |
1689 | * resume it later. In TLSv1.3 the session id we were sent is just an | |
1690 | * echo of what we originally sent in the ClientHello and should not be | |
1691 | * used for resumption. | |
1692 | */ | |
38b051a1 | 1693 | if (!SSL_CONNECTION_IS_TLS13(s)) { |
a5816a5a MC |
1694 | s->session->session_id_length = session_id_len; |
1695 | /* session_id_len could be 0 */ | |
1696 | if (session_id_len > 0) | |
1697 | memcpy(s->session->session_id, PACKET_data(&session_id), | |
1698 | session_id_len); | |
1699 | } | |
0f113f3e | 1700 | } |
fc5ce51d | 1701 | |
ccae4a15 FI |
1702 | /* Session version and negotiated protocol version should match */ |
1703 | if (s->version != s->session->ssl_version) { | |
c48ffbcc | 1704 | SSLfatal(s, SSL_AD_PROTOCOL_VERSION, |
f63a17d6 MC |
1705 | SSL_R_SSL_SESSION_VERSION_MISMATCH); |
1706 | goto err; | |
ccae4a15 | 1707 | } |
0f113f3e | 1708 | /* |
3eb2aff4 KR |
1709 | * Now that we know the version, update the check to see if it's an allowed |
1710 | * version. | |
1711 | */ | |
555cbb32 TS |
1712 | s->s3.tmp.min_ver = s->version; |
1713 | s->s3.tmp.max_ver = s->version; | |
0f113f3e | 1714 | |
11c67eea | 1715 | if (!set_client_ciphersuite(s, cipherchars)) { |
f63a17d6 MC |
1716 | /* SSLfatal() already called */ |
1717 | goto err; | |
0f113f3e MC |
1718 | } |
1719 | ||
09b6c2ef | 1720 | #ifdef OPENSSL_NO_COMP |
fc5ce51d | 1721 | if (compression != 0) { |
c48ffbcc | 1722 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 MC |
1723 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1724 | goto err; | |
0f113f3e MC |
1725 | } |
1726 | /* | |
1727 | * If compression is disabled we'd better not try to resume a session | |
1728 | * using compression. | |
1729 | */ | |
1730 | if (s->session->compress_meth != 0) { | |
c48ffbcc | 1731 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_INCONSISTENT_COMPRESSION); |
f63a17d6 | 1732 | goto err; |
0f113f3e | 1733 | } |
09b6c2ef | 1734 | #else |
fc5ce51d | 1735 | if (s->hit && compression != s->session->compress_meth) { |
c48ffbcc | 1736 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
dd5a4279 | 1737 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); |
f63a17d6 | 1738 | goto err; |
0f113f3e | 1739 | } |
fc5ce51d | 1740 | if (compression == 0) |
0f113f3e MC |
1741 | comp = NULL; |
1742 | else if (!ssl_allow_compression(s)) { | |
c48ffbcc | 1743 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_COMPRESSION_DISABLED); |
f63a17d6 | 1744 | goto err; |
fc5ce51d | 1745 | } else { |
38b051a1 TM |
1746 | comp = ssl3_comp_find(SSL_CONNECTION_GET_CTX(s)->comp_methods, |
1747 | compression); | |
fc5ce51d | 1748 | } |
0f113f3e | 1749 | |
fc5ce51d | 1750 | if (compression != 0 && comp == NULL) { |
c48ffbcc | 1751 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 MC |
1752 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1753 | goto err; | |
0f113f3e | 1754 | } else { |
555cbb32 | 1755 | s->s3.tmp.new_compression = comp; |
0f113f3e | 1756 | } |
09b6c2ef | 1757 | #endif |
761772d7 | 1758 | |
f63a17d6 MC |
1759 | if (!tls_parse_all_extensions(s, context, extensions, NULL, 0, 1)) { |
1760 | /* SSLfatal() already called */ | |
1761 | goto err; | |
1762 | } | |
332eb390 | 1763 | |
8723588e | 1764 | #ifndef OPENSSL_NO_SCTP |
38b051a1 | 1765 | if (SSL_CONNECTION_IS_DTLS(s) && s->hit) { |
8723588e MC |
1766 | unsigned char sctpauthkey[64]; |
1767 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
09d62b33 | 1768 | size_t labellen; |
8723588e MC |
1769 | |
1770 | /* | |
1771 | * Add new shared key for SCTP-Auth, will be ignored if | |
1772 | * no SCTP used. | |
1773 | */ | |
141eb8c6 MC |
1774 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
1775 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
8723588e | 1776 | |
09d62b33 MT |
1777 | /* Don't include the terminating zero. */ |
1778 | labellen = sizeof(labelbuffer) - 1; | |
1779 | if (s->mode & SSL_MODE_DTLS_SCTP_LABEL_LENGTH_BUG) | |
1780 | labellen += 1; | |
1781 | ||
38b051a1 | 1782 | if (SSL_export_keying_material(ssl, sctpauthkey, |
a230b26e EK |
1783 | sizeof(sctpauthkey), |
1784 | labelbuffer, | |
09d62b33 | 1785 | labellen, NULL, 0, 0) <= 0) { |
c48ffbcc | 1786 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f63a17d6 MC |
1787 | goto err; |
1788 | } | |
8723588e | 1789 | |
38b051a1 | 1790 | BIO_ctrl(SSL_get_wbio(ssl), |
8723588e MC |
1791 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, |
1792 | sizeof(sctpauthkey), sctpauthkey); | |
1793 | } | |
1794 | #endif | |
1795 | ||
92760c21 MC |
1796 | /* |
1797 | * In TLSv1.3 we have some post-processing to change cipher state, otherwise | |
1798 | * we're done with this message | |
1799 | */ | |
84a14925 MC |
1800 | if (SSL_CONNECTION_IS_TLS13(s)) { |
1801 | if (!ssl->method->ssl3_enc->setup_key_block(s) | |
86e75792 | 1802 | || !tls13_store_handshake_traffic_hash(s)) { |
84a14925 MC |
1803 | /* SSLfatal() already called */ |
1804 | goto err; | |
1805 | } | |
1806 | /* | |
1807 | * If we're not doing early-data and we're not going to send a dummy CCS | |
1808 | * (i.e. no middlebox compat mode) then we can change the write keys | |
1809 | * immediately. Otherwise we have to defer this until after all possible | |
23def9d3 | 1810 | * early data is written. We could just always defer until the last |
84a14925 MC |
1811 | * moment except QUIC needs it done at the same time as the read keys |
1812 | * are changed. Since QUIC doesn't do TLS early data or need middlebox | |
1813 | * compat this doesn't cause a problem. | |
1814 | */ | |
86e75792 MC |
1815 | if (SSL_IS_QUIC_HANDSHAKE(s) |
1816 | || (s->early_data_state == SSL_EARLY_DATA_NONE | |
1817 | && (s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) == 0)) { | |
1818 | if (!ssl->method->ssl3_enc->change_cipher_state(s, | |
84a14925 | 1819 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { |
86e75792 MC |
1820 | /* SSLfatal() already called */ |
1821 | goto err; | |
1822 | } | |
1823 | } | |
1824 | if (!ssl->method->ssl3_enc->change_cipher_state(s, | |
1825 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_READ)) { | |
84a14925 MC |
1826 | /* SSLfatal() already called */ |
1827 | goto err; | |
1828 | } | |
92760c21 MC |
1829 | } |
1830 | ||
1b0286a3 | 1831 | OPENSSL_free(extensions); |
b9908bf9 | 1832 | return MSG_PROCESS_CONTINUE_READING; |
f63a17d6 | 1833 | err: |
1b0286a3 | 1834 | OPENSSL_free(extensions); |
b9908bf9 | 1835 | return MSG_PROCESS_ERROR; |
0f113f3e | 1836 | } |
d02b48c6 | 1837 | |
38b051a1 | 1838 | static MSG_PROCESS_RETURN tls_process_as_hello_retry_request(SSL_CONNECTION *s, |
597c51bc | 1839 | PACKET *extpkt) |
3847d426 | 1840 | { |
3847d426 | 1841 | RAW_EXTENSION *extensions = NULL; |
3847d426 | 1842 | |
d4504fe5 | 1843 | /* |
f471f60a MC |
1844 | * If we were sending early_data then any alerts should not be sent using |
1845 | * the old wrlmethod. | |
d4504fe5 | 1846 | */ |
f471f60a MC |
1847 | if (s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING |
1848 | && !ssl_set_new_record_layer(s, | |
1849 | TLS_ANY_VERSION, | |
1850 | OSSL_RECORD_DIRECTION_WRITE, | |
1851 | OSSL_RECORD_PROTECTION_LEVEL_NONE, | |
3f9175c7 MC |
1852 | NULL, 0, NULL, 0, NULL, 0, NULL, 0, |
1853 | NULL, 0, NID_undef, NULL, NULL, NULL)) { | |
f471f60a MC |
1854 | /* SSLfatal already called */ |
1855 | goto err; | |
1856 | } | |
1857 | /* We are definitely going to be using TLSv1.3 */ | |
1858 | s->rlayer.wrlmethod->set_protocol_version(s->rlayer.wrl, TLS1_3_VERSION); | |
d4504fe5 | 1859 | |
597c51bc | 1860 | if (!tls_collect_extensions(s, extpkt, SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST, |
f63a17d6 | 1861 | &extensions, NULL, 1) |
fe874d27 | 1862 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST, |
f63a17d6 MC |
1863 | extensions, NULL, 0, 1)) { |
1864 | /* SSLfatal() already called */ | |
1865 | goto err; | |
1866 | } | |
3847d426 MC |
1867 | |
1868 | OPENSSL_free(extensions); | |
66d4bf6b MC |
1869 | extensions = NULL; |
1870 | ||
5b64ce89 | 1871 | if (s->ext.tls13_cookie_len == 0 && s->s3.tmp.pkey != NULL) { |
66d4bf6b MC |
1872 | /* |
1873 | * We didn't receive a cookie or a new key_share so the next | |
1874 | * ClientHello will not change | |
1875 | */ | |
c48ffbcc | 1876 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_NO_CHANGE_FOLLOWING_HRR); |
f63a17d6 | 1877 | goto err; |
66d4bf6b | 1878 | } |
3847d426 | 1879 | |
11c67eea MC |
1880 | /* |
1881 | * Re-initialise the Transcript Hash. We're going to prepopulate it with | |
1882 | * a synthetic message_hash in place of ClientHello1. | |
1883 | */ | |
43054d3d | 1884 | if (!create_synthetic_message_hash(s, NULL, 0, NULL, 0)) { |
f63a17d6 MC |
1885 | /* SSLfatal() already called */ |
1886 | goto err; | |
11c67eea MC |
1887 | } |
1888 | ||
1889 | /* | |
1890 | * Add this message to the Transcript Hash. Normally this is done | |
1891 | * automatically prior to the message processing stage. However due to the | |
1892 | * need to create the synthetic message hash, we defer that step until now | |
1893 | * for HRR messages. | |
1894 | */ | |
1895 | if (!ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, | |
1896 | s->init_num + SSL3_HM_HEADER_LENGTH)) { | |
f63a17d6 MC |
1897 | /* SSLfatal() already called */ |
1898 | goto err; | |
11c67eea MC |
1899 | } |
1900 | ||
3847d426 | 1901 | return MSG_PROCESS_FINISHED_READING; |
f63a17d6 | 1902 | err: |
3847d426 MC |
1903 | OPENSSL_free(extensions); |
1904 | return MSG_PROCESS_ERROR; | |
1905 | } | |
1906 | ||
3c95ef22 TS |
1907 | MSG_PROCESS_RETURN tls_process_server_rpk(SSL_CONNECTION *sc, PACKET *pkt) |
1908 | { | |
d7af3f7a | 1909 | EVP_PKEY *peer_rpk = NULL; |
3c95ef22 TS |
1910 | |
1911 | if (!tls_process_rpk(sc, pkt, &peer_rpk)) { | |
1912 | /* SSLfatal() already called */ | |
1913 | return MSG_PROCESS_ERROR; | |
1914 | } | |
1915 | ||
1916 | if (peer_rpk == NULL) { | |
1917 | SSLfatal(sc, SSL_AD_DECODE_ERROR, SSL_R_BAD_CERTIFICATE); | |
1918 | return MSG_PROCESS_ERROR; | |
1919 | } | |
1920 | ||
1921 | EVP_PKEY_free(sc->session->peer_rpk); | |
1922 | sc->session->peer_rpk = peer_rpk; | |
1923 | ||
1924 | return MSG_PROCESS_CONTINUE_PROCESSING; | |
1925 | } | |
1926 | ||
1927 | static WORK_STATE tls_post_process_server_rpk(SSL_CONNECTION *sc, | |
1928 | WORK_STATE wst) | |
1929 | { | |
1930 | size_t certidx; | |
1931 | const SSL_CERT_LOOKUP *clu; | |
6ae8e947 | 1932 | int v_ok; |
3c95ef22 TS |
1933 | |
1934 | if (sc->session->peer_rpk == NULL) { | |
1935 | SSLfatal(sc, SSL_AD_ILLEGAL_PARAMETER, | |
1936 | SSL_R_INVALID_RAW_PUBLIC_KEY); | |
1937 | return WORK_ERROR; | |
1938 | } | |
1939 | ||
1940 | if (sc->rwstate == SSL_RETRY_VERIFY) | |
1941 | sc->rwstate = SSL_NOTHING; | |
6ae8e947 VD |
1942 | |
1943 | ERR_set_mark(); | |
1944 | v_ok = ssl_verify_rpk(sc, sc->session->peer_rpk); | |
1945 | if (v_ok <= 0 && sc->verify_mode != SSL_VERIFY_NONE) { | |
1946 | ERR_clear_last_mark(); | |
1947 | SSLfatal(sc, ssl_x509err2alert(sc->verify_result), | |
1948 | SSL_R_CERTIFICATE_VERIFY_FAILED); | |
1949 | return WORK_ERROR; | |
1950 | } | |
1951 | ERR_pop_to_mark(); /* but we keep s->verify_result */ | |
1952 | if (v_ok > 0 && sc->rwstate == SSL_RETRY_VERIFY) { | |
3c95ef22 | 1953 | return WORK_MORE_A; |
6ae8e947 | 1954 | } |
3c95ef22 TS |
1955 | |
1956 | if ((clu = ssl_cert_lookup_by_pkey(sc->session->peer_rpk, &certidx, | |
1957 | SSL_CONNECTION_GET_CTX(sc))) == NULL) { | |
1958 | SSLfatal(sc, SSL_AD_ILLEGAL_PARAMETER, SSL_R_UNKNOWN_CERTIFICATE_TYPE); | |
1959 | return WORK_ERROR; | |
1960 | } | |
1961 | ||
1962 | /* | |
1963 | * Check certificate type is consistent with ciphersuite. For TLS 1.3 | |
1964 | * skip check since TLS 1.3 ciphersuites can be used with any certificate | |
1965 | * type. | |
1966 | */ | |
1967 | if (!SSL_CONNECTION_IS_TLS13(sc)) { | |
1968 | if ((clu->amask & sc->s3.tmp.new_cipher->algorithm_auth) == 0) { | |
1969 | SSLfatal(sc, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_RPK_TYPE); | |
1970 | return WORK_ERROR; | |
1971 | } | |
1972 | } | |
1973 | ||
1974 | /* Ensure there is no peer/peer_chain */ | |
1975 | X509_free(sc->session->peer); | |
1976 | sc->session->peer = NULL; | |
1977 | sk_X509_pop_free(sc->session->peer_chain, X509_free); | |
1978 | sc->session->peer_chain = NULL; | |
1979 | sc->session->verify_result = sc->verify_result; | |
1980 | ||
1981 | /* Save the current hash state for when we receive the CertificateVerify */ | |
1982 | if (SSL_CONNECTION_IS_TLS13(sc) | |
1983 | && !ssl_handshake_hash(sc, sc->cert_verify_hash, | |
1984 | sizeof(sc->cert_verify_hash), | |
1985 | &sc->cert_verify_hash_len)) { | |
1986 | /* SSLfatal() already called */ | |
1987 | return WORK_ERROR; | |
1988 | } | |
1989 | ||
1990 | return WORK_FINISHED_CONTINUE; | |
1991 | } | |
1992 | ||
3201abeb | 1993 | /* prepare server cert verification by setting s->session->peer_chain from pkt */ |
38b051a1 TM |
1994 | MSG_PROCESS_RETURN tls_process_server_certificate(SSL_CONNECTION *s, |
1995 | PACKET *pkt) | |
b9908bf9 | 1996 | { |
b9908bf9 MC |
1997 | unsigned long cert_list_len, cert_len; |
1998 | X509 *x = NULL; | |
b6981744 | 1999 | const unsigned char *certstart, *certbytes; |
0c3eb279 | 2000 | size_t chainidx; |
e96e0f8e | 2001 | unsigned int context = 0; |
38b051a1 | 2002 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
0f113f3e | 2003 | |
3c95ef22 TS |
2004 | if (s->ext.server_cert_type == TLSEXT_cert_type_rpk) |
2005 | return tls_process_server_rpk(s, pkt); | |
2006 | if (s->ext.server_cert_type != TLSEXT_cert_type_x509) { | |
2007 | SSLfatal(s, SSL_AD_UNSUPPORTED_CERTIFICATE, | |
2008 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); | |
2009 | goto err; | |
2010 | } | |
2011 | ||
0c3eb279 | 2012 | if ((s->session->peer_chain = sk_X509_new_null()) == NULL) { |
e077455e | 2013 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
cc273a93 | 2014 | goto err; |
0f113f3e MC |
2015 | } |
2016 | ||
38b051a1 | 2017 | if ((SSL_CONNECTION_IS_TLS13(s) && !PACKET_get_1(pkt, &context)) |
e96e0f8e MC |
2018 | || context != 0 |
2019 | || !PACKET_get_net_3(pkt, &cert_list_len) | |
1a281aab MC |
2020 | || PACKET_remaining(pkt) != cert_list_len |
2021 | || PACKET_remaining(pkt) == 0) { | |
c48ffbcc | 2022 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2023 | goto err; |
0f113f3e | 2024 | } |
d805a57b | 2025 | for (chainidx = 0; PACKET_remaining(pkt); chainidx++) { |
73999b62 | 2026 | if (!PACKET_get_net_3(pkt, &cert_len) |
a230b26e | 2027 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) { |
c48ffbcc | 2028 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_CERT_LENGTH_MISMATCH); |
f63a17d6 | 2029 | goto err; |
0f113f3e MC |
2030 | } |
2031 | ||
df758a85 | 2032 | certstart = certbytes; |
38b051a1 | 2033 | x = X509_new_ex(sctx->libctx, sctx->propq); |
0f113f3e | 2034 | if (x == NULL) { |
e077455e | 2035 | SSLfatal(s, SSL_AD_DECODE_ERROR, ERR_R_ASN1_LIB); |
6725682d SL |
2036 | goto err; |
2037 | } | |
2038 | if (d2i_X509(&x, (const unsigned char **)&certbytes, | |
2039 | cert_len) == NULL) { | |
c48ffbcc | 2040 | SSLfatal(s, SSL_AD_BAD_CERTIFICATE, ERR_R_ASN1_LIB); |
f63a17d6 | 2041 | goto err; |
0f113f3e | 2042 | } |
6725682d | 2043 | |
df758a85 | 2044 | if (certbytes != (certstart + cert_len)) { |
c48ffbcc | 2045 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_CERT_LENGTH_MISMATCH); |
f63a17d6 | 2046 | goto err; |
0f113f3e | 2047 | } |
e96e0f8e | 2048 | |
38b051a1 | 2049 | if (SSL_CONNECTION_IS_TLS13(s)) { |
e96e0f8e MC |
2050 | RAW_EXTENSION *rawexts = NULL; |
2051 | PACKET extensions; | |
2052 | ||
2053 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
c48ffbcc | 2054 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_LENGTH); |
f63a17d6 | 2055 | goto err; |
e96e0f8e | 2056 | } |
fe874d27 MC |
2057 | if (!tls_collect_extensions(s, &extensions, |
2058 | SSL_EXT_TLS1_3_CERTIFICATE, &rawexts, | |
f63a17d6 | 2059 | NULL, chainidx == 0) |
8e1634ec | 2060 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE, |
f63a17d6 | 2061 | rawexts, x, chainidx, |
8e1634ec | 2062 | PACKET_remaining(pkt) == 0)) { |
5ee289ea | 2063 | OPENSSL_free(rawexts); |
f63a17d6 MC |
2064 | /* SSLfatal already called */ |
2065 | goto err; | |
5ee289ea MC |
2066 | } |
2067 | OPENSSL_free(rawexts); | |
e96e0f8e MC |
2068 | } |
2069 | ||
0c3eb279 | 2070 | if (!sk_X509_push(s->session->peer_chain, x)) { |
e077455e | 2071 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
cc273a93 | 2072 | goto err; |
0f113f3e MC |
2073 | } |
2074 | x = NULL; | |
0f113f3e | 2075 | } |
0c3eb279 DDO |
2076 | return MSG_PROCESS_CONTINUE_PROCESSING; |
2077 | ||
2078 | err: | |
2079 | X509_free(x); | |
79b2a2f2 | 2080 | OSSL_STACK_OF_X509_free(s->session->peer_chain); |
0c3eb279 DDO |
2081 | s->session->peer_chain = NULL; |
2082 | return MSG_PROCESS_ERROR; | |
2083 | } | |
0f113f3e | 2084 | |
0c3eb279 DDO |
2085 | /* |
2086 | * Verify the s->session->peer_chain and check server cert type. | |
2087 | * On success set s->session->peer and s->session->verify_result. | |
2088 | * Else the peer certificate verification callback may request retry. | |
2089 | */ | |
38b051a1 TM |
2090 | WORK_STATE tls_post_process_server_certificate(SSL_CONNECTION *s, |
2091 | WORK_STATE wst) | |
0c3eb279 DDO |
2092 | { |
2093 | X509 *x; | |
2094 | EVP_PKEY *pkey = NULL; | |
2095 | const SSL_CERT_LOOKUP *clu; | |
2096 | size_t certidx; | |
2097 | int i; | |
2098 | ||
3c95ef22 TS |
2099 | if (s->ext.server_cert_type == TLSEXT_cert_type_rpk) |
2100 | return tls_post_process_server_rpk(s, wst); | |
2101 | ||
dfb39f73 TM |
2102 | if (s->rwstate == SSL_RETRY_VERIFY) |
2103 | s->rwstate = SSL_NOTHING; | |
739c4b2e | 2104 | |
c8e2f98c MC |
2105 | /* |
2106 | * The documented interface is that SSL_VERIFY_PEER should be set in order | |
2107 | * for client side verification of the server certificate to take place. | |
2108 | * However, historically the code has only checked that *any* flag is set | |
2109 | * to cause server verification to take place. Use of the other flags makes | |
2110 | * no sense in client mode. An attempt to clean up the semantics was | |
2111 | * reverted because at least one application *only* set | |
2112 | * SSL_VERIFY_FAIL_IF_NO_PEER_CERT. Prior to the clean up this still caused | |
2113 | * server verification to take place, after the clean up it silently did | |
2114 | * nothing. SSL_CTX_set_verify()/SSL_set_verify() cannot validate the flags | |
2115 | * sent to them because they are void functions. Therefore, we now use the | |
2116 | * (less clean) historic behaviour of performing validation if any flag is | |
2117 | * set. The *documented* interface remains the same. | |
2118 | */ | |
739c4b2e VD |
2119 | ERR_set_mark(); |
2120 | i = ssl_verify_cert_chain(s, s->session->peer_chain); | |
2121 | if (i <= 0 && s->verify_mode != SSL_VERIFY_NONE) { | |
2122 | ERR_clear_last_mark(); | |
c6d38183 | 2123 | SSLfatal(s, ssl_x509err2alert(s->verify_result), |
f63a17d6 | 2124 | SSL_R_CERTIFICATE_VERIFY_FAILED); |
0c3eb279 | 2125 | return WORK_ERROR; |
0f113f3e | 2126 | } |
739c4b2e VD |
2127 | ERR_pop_to_mark(); /* but we keep s->verify_result */ |
2128 | if (i > 0 && s->rwstate == SSL_RETRY_VERIFY) | |
2129 | return WORK_MORE_A; | |
0f113f3e | 2130 | |
0f113f3e MC |
2131 | /* |
2132 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
d4d78943 | 2133 | * which we don't include in statem_srvr.c |
0f113f3e | 2134 | */ |
0c3eb279 | 2135 | x = sk_X509_value(s->session->peer_chain, 0); |
0f113f3e | 2136 | |
8382fd3a | 2137 | pkey = X509_get0_pubkey(x); |
0f113f3e | 2138 | |
55a9a16f | 2139 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
c48ffbcc | 2140 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
f63a17d6 | 2141 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); |
0c3eb279 | 2142 | return WORK_ERROR; |
0f113f3e MC |
2143 | } |
2144 | ||
ee58915c MB |
2145 | if ((clu = ssl_cert_lookup_by_pkey(pkey, &certidx, |
2146 | SSL_CONNECTION_GET_CTX(s))) == NULL) { | |
c48ffbcc | 2147 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_UNKNOWN_CERTIFICATE_TYPE); |
0c3eb279 | 2148 | return WORK_ERROR; |
0f113f3e | 2149 | } |
05b8486e DSH |
2150 | /* |
2151 | * Check certificate type is consistent with ciphersuite. For TLS 1.3 | |
2152 | * skip check since TLS 1.3 ciphersuites can be used with any certificate | |
2153 | * type. | |
2154 | */ | |
38b051a1 | 2155 | if (!SSL_CONNECTION_IS_TLS13(s)) { |
555cbb32 | 2156 | if ((clu->amask & s->s3.tmp.new_cipher->algorithm_auth) == 0) { |
c48ffbcc | 2157 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CERTIFICATE_TYPE); |
0c3eb279 | 2158 | return WORK_ERROR; |
05b8486e | 2159 | } |
0f113f3e | 2160 | } |
55a9a16f | 2161 | |
00fbc969 FWH |
2162 | if (!X509_up_ref(x)) { |
2163 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
2164 | return WORK_ERROR; | |
2165 | } | |
2166 | ||
55a9a16f | 2167 | X509_free(s->session->peer); |
55a9a16f | 2168 | s->session->peer = x; |
0f113f3e | 2169 | s->session->verify_result = s->verify_result; |
3c95ef22 TS |
2170 | /* Ensure there is no RPK */ |
2171 | EVP_PKEY_free(s->session->peer_rpk); | |
2172 | s->session->peer_rpk = NULL; | |
2c5dfdc3 MC |
2173 | |
2174 | /* Save the current hash state for when we receive the CertificateVerify */ | |
38b051a1 | 2175 | if (SSL_CONNECTION_IS_TLS13(s) |
2c5dfdc3 MC |
2176 | && !ssl_handshake_hash(s, s->cert_verify_hash, |
2177 | sizeof(s->cert_verify_hash), | |
2178 | &s->cert_verify_hash_len)) { | |
f63a17d6 | 2179 | /* SSLfatal() already called */; |
0c3eb279 | 2180 | return WORK_ERROR; |
2c5dfdc3 | 2181 | } |
0c3eb279 | 2182 | return WORK_FINISHED_CONTINUE; |
0f113f3e | 2183 | } |
d02b48c6 | 2184 | |
b67cb09f TS |
2185 | #ifndef OPENSSL_NO_COMP_ALG |
2186 | MSG_PROCESS_RETURN tls_process_server_compressed_certificate(SSL_CONNECTION *sc, PACKET *pkt) | |
2187 | { | |
2188 | MSG_PROCESS_RETURN ret = MSG_PROCESS_ERROR; | |
2189 | PACKET tmppkt; | |
2190 | BUF_MEM *buf = BUF_MEM_new(); | |
2191 | ||
2192 | if (tls13_process_compressed_certificate(sc, pkt, &tmppkt, buf) != MSG_PROCESS_ERROR) | |
2193 | ret = tls_process_server_certificate(sc, &tmppkt); | |
2194 | ||
2195 | BUF_MEM_free(buf); | |
2196 | return ret; | |
2197 | } | |
2198 | #endif | |
2199 | ||
38b051a1 | 2200 | static int tls_process_ske_psk_preamble(SSL_CONNECTION *s, PACKET *pkt) |
02a74590 MC |
2201 | { |
2202 | #ifndef OPENSSL_NO_PSK | |
7dc1c647 | 2203 | PACKET psk_identity_hint; |
02a74590 | 2204 | |
7dc1c647 MC |
2205 | /* PSK ciphersuites are preceded by an identity hint */ |
2206 | ||
2207 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) { | |
c48ffbcc | 2208 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
7dc1c647 MC |
2209 | return 0; |
2210 | } | |
2211 | ||
2212 | /* | |
2213 | * Store PSK identity hint for later use, hint is used in | |
2214 | * tls_construct_client_key_exchange. Assume that the maximum length of | |
2215 | * a PSK identity hint can be as long as the maximum length of a PSK | |
2216 | * identity. | |
2217 | */ | |
2218 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { | |
c48ffbcc | 2219 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_DATA_LENGTH_TOO_LONG); |
7dc1c647 MC |
2220 | return 0; |
2221 | } | |
02a74590 | 2222 | |
7dc1c647 MC |
2223 | if (PACKET_remaining(&psk_identity_hint) == 0) { |
2224 | OPENSSL_free(s->session->psk_identity_hint); | |
2225 | s->session->psk_identity_hint = NULL; | |
2226 | } else if (!PACKET_strndup(&psk_identity_hint, | |
a230b26e | 2227 | &s->session->psk_identity_hint)) { |
c48ffbcc | 2228 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
7dc1c647 MC |
2229 | return 0; |
2230 | } | |
2231 | ||
2232 | return 1; | |
2233 | #else | |
c48ffbcc | 2234 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
7dc1c647 | 2235 | return 0; |
02a74590 MC |
2236 | #endif |
2237 | } | |
2238 | ||
38b051a1 | 2239 | static int tls_process_ske_srp(SSL_CONNECTION *s, PACKET *pkt, EVP_PKEY **pkey) |
25c6c10c MC |
2240 | { |
2241 | #ifndef OPENSSL_NO_SRP | |
2242 | PACKET prime, generator, salt, server_pub; | |
2243 | ||
2244 | if (!PACKET_get_length_prefixed_2(pkt, &prime) | |
2245 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
2246 | || !PACKET_get_length_prefixed_1(pkt, &salt) | |
2247 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) { | |
c48ffbcc | 2248 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
25c6c10c MC |
2249 | return 0; |
2250 | } | |
2251 | ||
2252 | if ((s->srp_ctx.N = | |
2253 | BN_bin2bn(PACKET_data(&prime), | |
348240c6 | 2254 | (int)PACKET_remaining(&prime), NULL)) == NULL |
25c6c10c MC |
2255 | || (s->srp_ctx.g = |
2256 | BN_bin2bn(PACKET_data(&generator), | |
348240c6 | 2257 | (int)PACKET_remaining(&generator), NULL)) == NULL |
25c6c10c MC |
2258 | || (s->srp_ctx.s = |
2259 | BN_bin2bn(PACKET_data(&salt), | |
348240c6 | 2260 | (int)PACKET_remaining(&salt), NULL)) == NULL |
25c6c10c MC |
2261 | || (s->srp_ctx.B = |
2262 | BN_bin2bn(PACKET_data(&server_pub), | |
348240c6 | 2263 | (int)PACKET_remaining(&server_pub), NULL)) == NULL) { |
c48ffbcc | 2264 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_BN_LIB); |
25c6c10c MC |
2265 | return 0; |
2266 | } | |
2267 | ||
a2c2e000 MC |
2268 | if (!srp_verify_server_param(s)) { |
2269 | /* SSLfatal() already called */ | |
25c6c10c MC |
2270 | return 0; |
2271 | } | |
2272 | ||
2273 | /* We must check if there is a certificate */ | |
555cbb32 | 2274 | if (s->s3.tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
3c95ef22 | 2275 | *pkey = tls_get_peer_pkey(s); |
25c6c10c MC |
2276 | |
2277 | return 1; | |
2278 | #else | |
c48ffbcc | 2279 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
25c6c10c MC |
2280 | return 0; |
2281 | #endif | |
2282 | } | |
2283 | ||
38b051a1 | 2284 | static int tls_process_ske_dhe(SSL_CONNECTION *s, PACKET *pkt, EVP_PKEY **pkey) |
e01a610d | 2285 | { |
e01a610d MC |
2286 | PACKET prime, generator, pub_key; |
2287 | EVP_PKEY *peer_tmp = NULL; | |
e01a610d | 2288 | BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL; |
1ee22dc2 MC |
2289 | EVP_PKEY_CTX *pctx = NULL; |
2290 | OSSL_PARAM *params = NULL; | |
2291 | OSSL_PARAM_BLD *tmpl = NULL; | |
38b051a1 | 2292 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
1ee22dc2 | 2293 | int ret = 0; |
26505153 | 2294 | |
e01a610d MC |
2295 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
2296 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
2297 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) { | |
c48ffbcc | 2298 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
e01a610d MC |
2299 | return 0; |
2300 | } | |
2301 | ||
348240c6 MC |
2302 | p = BN_bin2bn(PACKET_data(&prime), (int)PACKET_remaining(&prime), NULL); |
2303 | g = BN_bin2bn(PACKET_data(&generator), (int)PACKET_remaining(&generator), | |
2304 | NULL); | |
2305 | bnpub_key = BN_bin2bn(PACKET_data(&pub_key), | |
2306 | (int)PACKET_remaining(&pub_key), NULL); | |
e01a610d | 2307 | if (p == NULL || g == NULL || bnpub_key == NULL) { |
c48ffbcc | 2308 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_BN_LIB); |
e01a610d MC |
2309 | goto err; |
2310 | } | |
2311 | ||
1ee22dc2 MC |
2312 | tmpl = OSSL_PARAM_BLD_new(); |
2313 | if (tmpl == NULL | |
2314 | || !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_P, p) | |
2315 | || !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_G, g) | |
2316 | || !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_PUB_KEY, | |
2317 | bnpub_key) | |
2318 | || (params = OSSL_PARAM_BLD_to_param(tmpl)) == NULL) { | |
2319 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
e01a610d MC |
2320 | goto err; |
2321 | } | |
e01a610d | 2322 | |
38b051a1 | 2323 | pctx = EVP_PKEY_CTX_new_from_name(sctx->libctx, "DH", sctx->propq); |
1ee22dc2 MC |
2324 | if (pctx == NULL) { |
2325 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
26505153 RL |
2326 | goto err; |
2327 | } | |
2db985b7 SL |
2328 | if (EVP_PKEY_fromdata_init(pctx) <= 0 |
2329 | || EVP_PKEY_fromdata(pctx, &peer_tmp, EVP_PKEY_KEYPAIR, params) <= 0) { | |
1ee22dc2 | 2330 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_DH_VALUE); |
e01a610d MC |
2331 | goto err; |
2332 | } | |
e01a610d | 2333 | |
1ee22dc2 | 2334 | EVP_PKEY_CTX_free(pctx); |
38b051a1 | 2335 | pctx = EVP_PKEY_CTX_new_from_pkey(sctx->libctx, peer_tmp, sctx->propq); |
1ee22dc2 | 2336 | if (pctx == NULL |
899e2564 MC |
2337 | /* |
2338 | * EVP_PKEY_param_check() will verify that the DH params are using | |
2339 | * a safe prime. In this context, because we're using ephemeral DH, | |
2340 | * we're ok with it not being a safe prime. | |
2341 | * EVP_PKEY_param_check_quick() skips the safe prime check. | |
2342 | */ | |
2343 | || EVP_PKEY_param_check_quick(pctx) != 1 | |
1ee22dc2 MC |
2344 | || EVP_PKEY_public_check(pctx) != 1) { |
2345 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_DH_VALUE); | |
e01a610d MC |
2346 | goto err; |
2347 | } | |
2348 | ||
ed576acd TM |
2349 | if (!ssl_security(s, SSL_SECOP_TMP_DH, |
2350 | EVP_PKEY_get_security_bits(peer_tmp), | |
47e81a1b | 2351 | 0, peer_tmp)) { |
c48ffbcc | 2352 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_DH_KEY_TOO_SMALL); |
ada66e78 P |
2353 | goto err; |
2354 | } | |
2355 | ||
555cbb32 | 2356 | s->s3.peer_tmp = peer_tmp; |
1ee22dc2 | 2357 | peer_tmp = NULL; |
e01a610d MC |
2358 | |
2359 | /* | |
2360 | * FIXME: This makes assumptions about which ciphersuites come with | |
2361 | * public keys. We should have a less ad-hoc way of doing this | |
2362 | */ | |
555cbb32 | 2363 | if (s->s3.tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
3c95ef22 | 2364 | *pkey = tls_get_peer_pkey(s); |
e01a610d MC |
2365 | /* else anonymous DH, so no certificate or pkey. */ |
2366 | ||
1ee22dc2 | 2367 | ret = 1; |
e01a610d MC |
2368 | |
2369 | err: | |
1ee22dc2 | 2370 | OSSL_PARAM_BLD_free(tmpl); |
3f883c7c | 2371 | OSSL_PARAM_free(params); |
1ee22dc2 MC |
2372 | EVP_PKEY_free(peer_tmp); |
2373 | EVP_PKEY_CTX_free(pctx); | |
e01a610d MC |
2374 | BN_free(p); |
2375 | BN_free(g); | |
2376 | BN_free(bnpub_key); | |
e01a610d | 2377 | |
1ee22dc2 | 2378 | return ret; |
e01a610d MC |
2379 | } |
2380 | ||
38b051a1 | 2381 | static int tls_process_ske_ecdhe(SSL_CONNECTION *s, PACKET *pkt, EVP_PKEY **pkey) |
ff74aeb1 | 2382 | { |
ff74aeb1 | 2383 | PACKET encoded_pt; |
6447e818 | 2384 | unsigned int curve_type, curve_id; |
ff74aeb1 MC |
2385 | |
2386 | /* | |
2387 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
6447e818 | 2388 | * public key. We only support named (not generic) curves and |
ff74aeb1 MC |
2389 | * ECParameters in this case is just three bytes. |
2390 | */ | |
6447e818 | 2391 | if (!PACKET_get_1(pkt, &curve_type) || !PACKET_get_net_2(pkt, &curve_id)) { |
c48ffbcc | 2392 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_TOO_SHORT); |
ff74aeb1 MC |
2393 | return 0; |
2394 | } | |
2395 | /* | |
6447e818 DSH |
2396 | * Check curve is named curve type and one of our preferences, if not |
2397 | * server has sent an invalid curve. | |
ff74aeb1 | 2398 | */ |
dcf8b01f MC |
2399 | if (curve_type != NAMED_CURVE_TYPE |
2400 | || !tls1_check_group_id(s, curve_id, 1)) { | |
c48ffbcc | 2401 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CURVE); |
ff74aeb1 MC |
2402 | return 0; |
2403 | } | |
2404 | ||
ada66e78 | 2405 | if ((s->s3.peer_tmp = ssl_generate_param_group(s, curve_id)) == NULL) { |
c48ffbcc | 2406 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
a2c2e000 | 2407 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
ff74aeb1 MC |
2408 | return 0; |
2409 | } | |
2410 | ||
ff74aeb1 | 2411 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) { |
c48ffbcc | 2412 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
ff74aeb1 MC |
2413 | return 0; |
2414 | } | |
2415 | ||
5ac8fb58 MC |
2416 | if (EVP_PKEY_set1_encoded_public_key(s->s3.peer_tmp, |
2417 | PACKET_data(&encoded_pt), | |
2418 | PACKET_remaining(&encoded_pt)) <= 0) { | |
c48ffbcc | 2419 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_ECPOINT); |
ff74aeb1 MC |
2420 | return 0; |
2421 | } | |
2422 | ||
2423 | /* | |
2424 | * The ECC/TLS specification does not mention the use of DSA to sign | |
2425 | * ECParameters in the server key exchange message. We do support RSA | |
2426 | * and ECDSA. | |
2427 | */ | |
555cbb32 | 2428 | if (s->s3.tmp.new_cipher->algorithm_auth & SSL_aECDSA) |
3c95ef22 | 2429 | *pkey = tls_get_peer_pkey(s); |
555cbb32 | 2430 | else if (s->s3.tmp.new_cipher->algorithm_auth & SSL_aRSA) |
3c95ef22 | 2431 | *pkey = tls_get_peer_pkey(s); |
ff74aeb1 MC |
2432 | /* else anonymous ECDH, so no certificate or pkey. */ |
2433 | ||
aa6bd216 BK |
2434 | /* Cache the agreed upon group in the SSL_SESSION */ |
2435 | s->session->kex_group = curve_id; | |
ff74aeb1 | 2436 | return 1; |
ff74aeb1 MC |
2437 | } |
2438 | ||
38b051a1 | 2439 | MSG_PROCESS_RETURN tls_process_key_exchange(SSL_CONNECTION *s, PACKET *pkt) |
b9908bf9 | 2440 | { |
e1e588ac | 2441 | long alg_k; |
b9908bf9 | 2442 | EVP_PKEY *pkey = NULL; |
fe3066ee MC |
2443 | EVP_MD_CTX *md_ctx = NULL; |
2444 | EVP_PKEY_CTX *pctx = NULL; | |
73999b62 | 2445 | PACKET save_param_start, signature; |
38b051a1 | 2446 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
b9908bf9 | 2447 | |
555cbb32 | 2448 | alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
b9908bf9 | 2449 | |
73999b62 | 2450 | save_param_start = *pkt; |
8d92c1f8 | 2451 | |
555cbb32 TS |
2452 | EVP_PKEY_free(s->s3.peer_tmp); |
2453 | s->s3.peer_tmp = NULL; | |
d02b48c6 | 2454 | |
7689082b | 2455 | if (alg_k & SSL_PSK) { |
a2c2e000 MC |
2456 | if (!tls_process_ske_psk_preamble(s, pkt)) { |
2457 | /* SSLfatal() already called */ | |
7dc1c647 | 2458 | goto err; |
a2c2e000 | 2459 | } |
7689082b DSH |
2460 | } |
2461 | ||
2462 | /* Nothing else to do for plain PSK or RSAPSK */ | |
2463 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
25c6c10c | 2464 | } else if (alg_k & SSL_kSRP) { |
a2c2e000 MC |
2465 | if (!tls_process_ske_srp(s, pkt, &pkey)) { |
2466 | /* SSLfatal() already called */ | |
0f113f3e | 2467 | goto err; |
a2c2e000 | 2468 | } |
e01a610d | 2469 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
a2c2e000 MC |
2470 | if (!tls_process_ske_dhe(s, pkt, &pkey)) { |
2471 | /* SSLfatal() already called */ | |
e01a610d | 2472 | goto err; |
a2c2e000 | 2473 | } |
ff74aeb1 | 2474 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
a2c2e000 MC |
2475 | if (!tls_process_ske_ecdhe(s, pkt, &pkey)) { |
2476 | /* SSLfatal() already called */ | |
ff74aeb1 | 2477 | goto err; |
a2c2e000 | 2478 | } |
0f113f3e | 2479 | } else if (alg_k) { |
c48ffbcc | 2480 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_R_UNEXPECTED_MESSAGE); |
e1e588ac | 2481 | goto err; |
0f113f3e | 2482 | } |
0f113f3e | 2483 | |
0f113f3e MC |
2484 | /* if it was signed, check the signature */ |
2485 | if (pkey != NULL) { | |
32942870 | 2486 | PACKET params; |
be8dba2c | 2487 | const EVP_MD *md = NULL; |
72ceb6a6 DSH |
2488 | unsigned char *tbs; |
2489 | size_t tbslen; | |
2490 | int rv; | |
e1e588ac | 2491 | |
32942870 EK |
2492 | /* |
2493 | * |pkt| now points to the beginning of the signature, so the difference | |
2494 | * equals the length of the parameters. | |
2495 | */ | |
2496 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms, | |
2497 | PACKET_remaining(&save_param_start) - | |
73999b62 | 2498 | PACKET_remaining(pkt))) { |
c48ffbcc | 2499 | SSLfatal(s, SSL_AD_DECODE_ERROR, ERR_R_INTERNAL_ERROR); |
e1e588ac | 2500 | goto err; |
32942870 EK |
2501 | } |
2502 | ||
0f113f3e | 2503 | if (SSL_USE_SIGALGS(s)) { |
703bcee0 | 2504 | unsigned int sigalg; |
703bcee0 MC |
2505 | |
2506 | if (!PACKET_get_net_2(pkt, &sigalg)) { | |
c48ffbcc | 2507 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_TOO_SHORT); |
e1e588ac | 2508 | goto err; |
0f113f3e | 2509 | } |
f63a17d6 MC |
2510 | if (tls12_check_peer_sigalg(s, sigalg, pkey) <=0) { |
2511 | /* SSLfatal() already called */ | |
0f113f3e | 2512 | goto err; |
0f113f3e | 2513 | } |
f365a3e2 | 2514 | } else if (!tls1_set_peer_legacy_sigalg(s, pkey)) { |
97b8db1a TM |
2515 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2516 | SSL_R_LEGACY_SIGALG_DISALLOWED_OR_UNSUPPORTED); | |
f365a3e2 | 2517 | goto err; |
32942870 | 2518 | } |
0f113f3e | 2519 | |
38b051a1 | 2520 | if (!tls1_lookup_md(sctx, s->s3.tmp.peer_sigalg, &md)) { |
c48ffbcc | 2521 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
7cd1420b | 2522 | SSL_R_NO_SUITABLE_DIGEST_ALGORITHM); |
b2021556 DSH |
2523 | goto err; |
2524 | } | |
44f23cd2 | 2525 | if (SSL_USE_SIGALGS(s)) |
49b26f54 | 2526 | OSSL_TRACE1(TLS, "USING TLSv1.2 HASH %s\n", |
ed576acd | 2527 | md == NULL ? "n/a" : EVP_MD_get0_name(md)); |
f365a3e2 | 2528 | |
73999b62 MC |
2529 | if (!PACKET_get_length_prefixed_2(pkt, &signature) |
2530 | || PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 2531 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
e1e588ac | 2532 | goto err; |
0f113f3e | 2533 | } |
e1e588ac MC |
2534 | |
2535 | md_ctx = EVP_MD_CTX_new(); | |
2536 | if (md_ctx == NULL) { | |
e077455e | 2537 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
e1e588ac | 2538 | goto err; |
0f113f3e | 2539 | } |
e1e588ac | 2540 | |
d8652be0 | 2541 | if (EVP_DigestVerifyInit_ex(md_ctx, &pctx, |
ed576acd | 2542 | md == NULL ? NULL : EVP_MD_get0_name(md), |
38b051a1 | 2543 | sctx->libctx, sctx->propq, pkey, |
d38b6ae9 | 2544 | NULL) <= 0) { |
c48ffbcc | 2545 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
fe3066ee MC |
2546 | goto err; |
2547 | } | |
5554facb | 2548 | if (SSL_USE_PSS(s)) { |
fe3066ee | 2549 | if (EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) <= 0 |
91410d40 | 2550 | || EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, |
968ae5b3 | 2551 | RSA_PSS_SALTLEN_DIGEST) <= 0) { |
c48ffbcc | 2552 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
fe3066ee MC |
2553 | goto err; |
2554 | } | |
2555 | } | |
72ceb6a6 DSH |
2556 | tbslen = construct_key_exchange_tbs(s, &tbs, PACKET_data(¶ms), |
2557 | PACKET_remaining(¶ms)); | |
2558 | if (tbslen == 0) { | |
f63a17d6 | 2559 | /* SSLfatal() already called */ |
e1e588ac | 2560 | goto err; |
192e4bbb | 2561 | } |
72ceb6a6 DSH |
2562 | |
2563 | rv = EVP_DigestVerify(md_ctx, PACKET_data(&signature), | |
2564 | PACKET_remaining(&signature), tbs, tbslen); | |
2565 | OPENSSL_free(tbs); | |
cfba0675 | 2566 | if (rv <= 0) { |
c48ffbcc | 2567 | SSLfatal(s, SSL_AD_DECRYPT_ERROR, SSL_R_BAD_SIGNATURE); |
e1e588ac | 2568 | goto err; |
0f113f3e | 2569 | } |
e1e588ac | 2570 | EVP_MD_CTX_free(md_ctx); |
fe3066ee | 2571 | md_ctx = NULL; |
0f113f3e | 2572 | } else { |
7689082b | 2573 | /* aNULL, aSRP or PSK do not need public keys */ |
555cbb32 | 2574 | if (!(s->s3.tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP)) |
a230b26e | 2575 | && !(alg_k & SSL_PSK)) { |
0f113f3e | 2576 | /* Might be wrong key type, check it */ |
e1e588ac | 2577 | if (ssl3_check_cert_and_algorithm(s)) { |
c48ffbcc | 2578 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_DATA); |
e1e588ac | 2579 | } |
a2c2e000 | 2580 | /* else this shouldn't happen, SSLfatal() already called */ |
0f113f3e MC |
2581 | goto err; |
2582 | } | |
2583 | /* still data left over */ | |
73999b62 | 2584 | if (PACKET_remaining(pkt) != 0) { |
c48ffbcc | 2585 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_EXTRA_DATA_IN_MESSAGE); |
e1e588ac | 2586 | goto err; |
0f113f3e MC |
2587 | } |
2588 | } | |
e1e588ac | 2589 | |
b9908bf9 | 2590 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2591 | err: |
fe3066ee | 2592 | EVP_MD_CTX_free(md_ctx); |
b9908bf9 | 2593 | return MSG_PROCESS_ERROR; |
0f113f3e | 2594 | } |
d02b48c6 | 2595 | |
38b051a1 TM |
2596 | MSG_PROCESS_RETURN tls_process_certificate_request(SSL_CONNECTION *s, |
2597 | PACKET *pkt) | |
b9908bf9 | 2598 | { |
32f66107 | 2599 | /* Clear certificate validity flags */ |
ee58915c MB |
2600 | if (s->s3.tmp.valid_flags != NULL) |
2601 | memset(s->s3.tmp.valid_flags, 0, s->ssl_pkey_num * sizeof(uint32_t)); | |
2602 | else | |
2603 | s->s3.tmp.valid_flags = OPENSSL_zalloc(s->ssl_pkey_num * sizeof(uint32_t)); | |
2604 | ||
2605 | /* Give up for good if allocation didn't work */ | |
2606 | if (s->s3.tmp.valid_flags == NULL) | |
2607 | return 0; | |
0f113f3e | 2608 | |
38b051a1 | 2609 | if (SSL_CONNECTION_IS_TLS13(s)) { |
32f66107 DSH |
2610 | PACKET reqctx, extensions; |
2611 | RAW_EXTENSION *rawexts = NULL; | |
03f44b97 | 2612 | |
1bf4cb0f MC |
2613 | if ((s->shutdown & SSL_SENT_SHUTDOWN) != 0) { |
2614 | /* | |
2615 | * We already sent close_notify. This can only happen in TLSv1.3 | |
2616 | * post-handshake messages. We can't reasonably respond to this, so | |
2617 | * we just ignore it | |
2618 | */ | |
2619 | return MSG_PROCESS_FINISHED_READING; | |
2620 | } | |
2621 | ||
03f44b97 | 2622 | /* Free and zero certificate types: it is not present in TLS 1.3 */ |
555cbb32 TS |
2623 | OPENSSL_free(s->s3.tmp.ctype); |
2624 | s->s3.tmp.ctype = NULL; | |
2625 | s->s3.tmp.ctype_len = 0; | |
9d75dce3 TS |
2626 | OPENSSL_free(s->pha_context); |
2627 | s->pha_context = NULL; | |
39a14059 | 2628 | s->pha_context_len = 0; |
32f66107 | 2629 | |
9d75dce3 TS |
2630 | if (!PACKET_get_length_prefixed_1(pkt, &reqctx) || |
2631 | !PACKET_memdup(&reqctx, &s->pha_context, &s->pha_context_len)) { | |
c48ffbcc | 2632 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2633 | return MSG_PROCESS_ERROR; |
03f44b97 | 2634 | } |
32f66107 DSH |
2635 | |
2636 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
c48ffbcc | 2637 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_LENGTH); |
f63a17d6 | 2638 | return MSG_PROCESS_ERROR; |
32f66107 DSH |
2639 | } |
2640 | if (!tls_collect_extensions(s, &extensions, | |
fe874d27 | 2641 | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, |
f63a17d6 | 2642 | &rawexts, NULL, 1) |
fe874d27 | 2643 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, |
f63a17d6 MC |
2644 | rawexts, NULL, 0, 1)) { |
2645 | /* SSLfatal() already called */ | |
32f66107 | 2646 | OPENSSL_free(rawexts); |
f63a17d6 | 2647 | return MSG_PROCESS_ERROR; |
32f66107 DSH |
2648 | } |
2649 | OPENSSL_free(rawexts); | |
2650 | if (!tls1_process_sigalgs(s)) { | |
c48ffbcc | 2651 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_LENGTH); |
f63a17d6 | 2652 | return MSG_PROCESS_ERROR; |
32f66107 | 2653 | } |
03f44b97 DSH |
2654 | } else { |
2655 | PACKET ctypes; | |
75c13e78 | 2656 | |
03f44b97 DSH |
2657 | /* get the certificate types */ |
2658 | if (!PACKET_get_length_prefixed_1(pkt, &ctypes)) { | |
c48ffbcc | 2659 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2660 | return MSG_PROCESS_ERROR; |
03f44b97 DSH |
2661 | } |
2662 | ||
555cbb32 | 2663 | if (!PACKET_memdup(&ctypes, &s->s3.tmp.ctype, &s->s3.tmp.ctype_len)) { |
c48ffbcc | 2664 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f63a17d6 | 2665 | return MSG_PROCESS_ERROR; |
03f44b97 | 2666 | } |
ac112332 | 2667 | |
32f66107 DSH |
2668 | if (SSL_USE_SIGALGS(s)) { |
2669 | PACKET sigalgs; | |
703bcee0 | 2670 | |
32f66107 | 2671 | if (!PACKET_get_length_prefixed_2(pkt, &sigalgs)) { |
c48ffbcc | 2672 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2673 | return MSG_PROCESS_ERROR; |
32f66107 | 2674 | } |
ac112332 | 2675 | |
c589c34e BK |
2676 | /* |
2677 | * Despite this being for certificates, preserve compatibility | |
2678 | * with pre-TLS 1.3 and use the regular sigalgs field. | |
2679 | */ | |
2680 | if (!tls1_save_sigalgs(s, &sigalgs, 0)) { | |
f63a17d6 | 2681 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
f63a17d6 MC |
2682 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); |
2683 | return MSG_PROCESS_ERROR; | |
32f66107 DSH |
2684 | } |
2685 | if (!tls1_process_sigalgs(s)) { | |
e077455e | 2686 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_SSL_LIB); |
f63a17d6 | 2687 | return MSG_PROCESS_ERROR; |
32f66107 | 2688 | } |
0f113f3e | 2689 | } |
0f113f3e | 2690 | |
32f66107 | 2691 | /* get the CA RDNs */ |
f63a17d6 MC |
2692 | if (!parse_ca_names(s, pkt)) { |
2693 | /* SSLfatal() already called */ | |
2694 | return MSG_PROCESS_ERROR; | |
2695 | } | |
03f44b97 DSH |
2696 | } |
2697 | ||
2698 | if (PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 2699 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2700 | return MSG_PROCESS_ERROR; |
03f44b97 | 2701 | } |
0f113f3e | 2702 | |
0f113f3e | 2703 | /* we should setup a certificate to return.... */ |
555cbb32 | 2704 | s->s3.tmp.cert_req = 1; |
0f113f3e | 2705 | |
e4562014 MC |
2706 | /* |
2707 | * In TLSv1.3 we don't prepare the client certificate yet. We wait until | |
2708 | * after the CertificateVerify message has been received. This is because | |
2709 | * in TLSv1.3 the CertificateRequest arrives before the Certificate message | |
2710 | * but in TLSv1.2 it is the other way around. We want to make sure that | |
8c2bfd25 | 2711 | * SSL_get1_peer_certificate() returns something sensible in |
e4562014 MC |
2712 | * client_cert_cb. |
2713 | */ | |
38b051a1 TM |
2714 | if (SSL_CONNECTION_IS_TLS13(s) |
2715 | && s->post_handshake_auth != SSL_PHA_REQUESTED) | |
e4562014 MC |
2716 | return MSG_PROCESS_CONTINUE_READING; |
2717 | ||
f63a17d6 | 2718 | return MSG_PROCESS_CONTINUE_PROCESSING; |
0f113f3e MC |
2719 | } |
2720 | ||
38b051a1 TM |
2721 | MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL_CONNECTION *s, |
2722 | PACKET *pkt) | |
b9908bf9 | 2723 | { |
b9908bf9 | 2724 | unsigned int ticklen; |
9ac6244b | 2725 | unsigned long ticket_lifetime_hint, age_add = 0; |
ec60ccc1 | 2726 | unsigned int sess_len; |
de1df7e9 | 2727 | RAW_EXTENSION *exts = NULL; |
9b6a8254 | 2728 | PACKET nonce; |
abd86cec | 2729 | EVP_MD *sha256 = NULL; |
38b051a1 | 2730 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
b9908bf9 | 2731 | |
6cf2dbd9 MC |
2732 | PACKET_null_init(&nonce); |
2733 | ||
73999b62 | 2734 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint) |
38b051a1 | 2735 | || (SSL_CONNECTION_IS_TLS13(s) |
9b6a8254 | 2736 | && (!PACKET_get_net_4(pkt, &age_add) |
6cf2dbd9 | 2737 | || !PACKET_get_length_prefixed_1(pkt, &nonce))) |
a230b26e | 2738 | || !PACKET_get_net_2(pkt, &ticklen) |
1cf2f823 | 2739 | || (SSL_CONNECTION_IS_TLS13(s) ? (ticklen == 0 |
38b051a1 TM |
2740 | || PACKET_remaining(pkt) < ticklen) |
2741 | : PACKET_remaining(pkt) != ticklen)) { | |
c48ffbcc | 2742 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2743 | goto err; |
e711da71 EK |
2744 | } |
2745 | ||
de1df7e9 MC |
2746 | /* |
2747 | * Server is allowed to change its mind (in <=TLSv1.2) and send an empty | |
2748 | * ticket. We already checked this TLSv1.3 case above, so it should never | |
2749 | * be 0 here in that instance | |
2750 | */ | |
e711da71 | 2751 | if (ticklen == 0) |
c9de4a20 | 2752 | return MSG_PROCESS_CONTINUE_READING; |
e711da71 | 2753 | |
150840b9 MC |
2754 | /* |
2755 | * Sessions must be immutable once they go into the session cache. Otherwise | |
2756 | * we can get multi-thread problems. Therefore we don't "update" sessions, | |
2757 | * we replace them with a duplicate. In TLSv1.3 we need to do this every | |
2758 | * time a NewSessionTicket arrives because those messages arrive | |
2759 | * post-handshake and the session may have already gone into the session | |
2760 | * cache. | |
2761 | */ | |
38b051a1 | 2762 | if (SSL_CONNECTION_IS_TLS13(s) || s->session->session_id_length > 0) { |
98ece4ee | 2763 | SSL_SESSION *new_sess; |
1f156321 | 2764 | |
98ece4ee MC |
2765 | /* |
2766 | * We reused an existing session, so we need to replace it with a new | |
2767 | * one | |
2768 | */ | |
5d61491c | 2769 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { |
e077455e | 2770 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_SSL_LIB); |
f63a17d6 | 2771 | goto err; |
5d61491c MC |
2772 | } |
2773 | ||
1f156321 | 2774 | if ((s->session_ctx->session_cache_mode & SSL_SESS_CACHE_CLIENT) != 0 |
38b051a1 | 2775 | && !SSL_CONNECTION_IS_TLS13(s)) { |
1f156321 MC |
2776 | /* |
2777 | * In TLSv1.2 and below the arrival of a new tickets signals that | |
2778 | * any old ticket we were using is now out of date, so we remove the | |
2779 | * old session from the cache. We carry on if this fails | |
2780 | */ | |
2781 | SSL_CTX_remove_session(s->session_ctx, s->session); | |
2782 | } | |
2783 | ||
98ece4ee MC |
2784 | SSL_SESSION_free(s->session); |
2785 | s->session = new_sess; | |
2786 | } | |
2787 | ||
f0131dc0 | 2788 | s->session->time = ossl_time_now(); |
25959e04 | 2789 | ssl_session_calculate_timeout(s->session); |
fc24f0bf | 2790 | |
aff8c126 RS |
2791 | OPENSSL_free(s->session->ext.tick); |
2792 | s->session->ext.tick = NULL; | |
2793 | s->session->ext.ticklen = 0; | |
e711da71 | 2794 | |
aff8c126 RS |
2795 | s->session->ext.tick = OPENSSL_malloc(ticklen); |
2796 | if (s->session->ext.tick == NULL) { | |
e077455e | 2797 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
0f113f3e MC |
2798 | goto err; |
2799 | } | |
aff8c126 | 2800 | if (!PACKET_copy_bytes(pkt, s->session->ext.tick, ticklen)) { |
c48ffbcc | 2801 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2802 | goto err; |
561e12bb | 2803 | } |
e711da71 | 2804 | |
aff8c126 | 2805 | s->session->ext.tick_lifetime_hint = ticket_lifetime_hint; |
fc24f0bf | 2806 | s->session->ext.tick_age_add = age_add; |
aff8c126 | 2807 | s->session->ext.ticklen = ticklen; |
de1df7e9 | 2808 | |
38b051a1 | 2809 | if (SSL_CONNECTION_IS_TLS13(s)) { |
de1df7e9 MC |
2810 | PACKET extpkt; |
2811 | ||
2812 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt) | |
1cde0259 | 2813 | || PACKET_remaining(pkt) != 0) { |
c48ffbcc | 2814 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
1cde0259 MC |
2815 | goto err; |
2816 | } | |
2817 | ||
2818 | if (!tls_collect_extensions(s, &extpkt, | |
2819 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET, &exts, | |
2820 | NULL, 1) | |
fe874d27 MC |
2821 | || !tls_parse_all_extensions(s, |
2822 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET, | |
f63a17d6 MC |
2823 | exts, NULL, 0, 1)) { |
2824 | /* SSLfatal() already called */ | |
2825 | goto err; | |
de1df7e9 MC |
2826 | } |
2827 | } | |
2828 | ||
0f113f3e MC |
2829 | /* |
2830 | * There are two ways to detect a resumed ticket session. One is to set | |
2831 | * an appropriate session ID and then the server must return a match in | |
2832 | * ServerHello. This allows the normal client session ID matching to work | |
2833 | * and we know much earlier that the ticket has been accepted. The | |
2834 | * other way is to set zero length session ID when the ticket is | |
2835 | * presented and rely on the handshake to determine session resumption. | |
2836 | * We choose the former approach because this fits in with assumptions | |
abd86cec MC |
2837 | * elsewhere in OpenSSL. The session ID is set to the SHA256 hash of the |
2838 | * ticket. | |
0f113f3e | 2839 | */ |
38b051a1 | 2840 | sha256 = EVP_MD_fetch(sctx->libctx, "SHA2-256", sctx->propq); |
abd86cec | 2841 | if (sha256 == NULL) { |
5a2d0ef3 RL |
2842 | /* Error is already recorded */ |
2843 | SSLfatal_alert(s, SSL_AD_INTERNAL_ERROR); | |
abd86cec MC |
2844 | goto err; |
2845 | } | |
ec60ccc1 | 2846 | /* |
407820c0 | 2847 | * We use sess_len here because EVP_Digest expects an int |
ec60ccc1 MC |
2848 | * but s->session->session_id_length is a size_t |
2849 | */ | |
aff8c126 | 2850 | if (!EVP_Digest(s->session->ext.tick, ticklen, |
ec60ccc1 | 2851 | s->session->session_id, &sess_len, |
abd86cec | 2852 | sha256, NULL)) { |
c48ffbcc | 2853 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
d166ed8c DSH |
2854 | goto err; |
2855 | } | |
abd86cec MC |
2856 | EVP_MD_free(sha256); |
2857 | sha256 = NULL; | |
ec60ccc1 | 2858 | s->session->session_id_length = sess_len; |
4cb00457 | 2859 | s->session->not_resumable = 0; |
de1df7e9 MC |
2860 | |
2861 | /* This is a standalone message in TLSv1.3, so there is no more to read */ | |
38b051a1 | 2862 | if (SSL_CONNECTION_IS_TLS13(s)) { |
4ff1a526 | 2863 | const EVP_MD *md = ssl_handshake_md(s); |
ed576acd | 2864 | int hashleni = EVP_MD_get_size(md); |
4ff1a526 MC |
2865 | size_t hashlen; |
2866 | static const unsigned char nonce_label[] = "resumption"; | |
2867 | ||
2868 | /* Ensure cast to size_t is safe */ | |
14c45338 | 2869 | if (!ossl_assert(hashleni > 0)) { |
c48ffbcc | 2870 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
4ff1a526 MC |
2871 | goto err; |
2872 | } | |
2873 | hashlen = (size_t)hashleni; | |
2874 | ||
2875 | if (!tls13_hkdf_expand(s, md, s->resumption_master_secret, | |
2876 | nonce_label, | |
2877 | sizeof(nonce_label) - 1, | |
6cf2dbd9 MC |
2878 | PACKET_data(&nonce), |
2879 | PACKET_remaining(&nonce), | |
4ff1a526 | 2880 | s->session->master_key, |
0fb2815b | 2881 | hashlen, 1)) { |
4ff1a526 MC |
2882 | /* SSLfatal() already called */ |
2883 | goto err; | |
2884 | } | |
2885 | s->session->master_key_length = hashlen; | |
2886 | ||
33d93417 | 2887 | OPENSSL_free(exts); |
de1df7e9 MC |
2888 | ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); |
2889 | return MSG_PROCESS_FINISHED_READING; | |
2890 | } | |
2891 | ||
b9908bf9 | 2892 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2893 | err: |
abd86cec | 2894 | EVP_MD_free(sha256); |
33d93417 | 2895 | OPENSSL_free(exts); |
b9908bf9 | 2896 | return MSG_PROCESS_ERROR; |
0f113f3e | 2897 | } |
67c8e7f4 | 2898 | |
f63e4288 MC |
2899 | /* |
2900 | * In TLSv1.3 this is called from the extensions code, otherwise it is used to | |
f63a17d6 | 2901 | * parse a separate message. Returns 1 on success or 0 on failure |
f63e4288 | 2902 | */ |
38b051a1 | 2903 | int tls_process_cert_status_body(SSL_CONNECTION *s, PACKET *pkt) |
b9908bf9 | 2904 | { |
8b0e934a | 2905 | size_t resplen; |
b9908bf9 | 2906 | unsigned int type; |
b9908bf9 | 2907 | |
73999b62 | 2908 | if (!PACKET_get_1(pkt, &type) |
a230b26e | 2909 | || type != TLSEXT_STATUSTYPE_ocsp) { |
c48ffbcc | 2910 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_UNSUPPORTED_STATUS_TYPE); |
f63e4288 | 2911 | return 0; |
0f113f3e | 2912 | } |
56a26ce3 MC |
2913 | if (!PACKET_get_net_3_len(pkt, &resplen) |
2914 | || PACKET_remaining(pkt) != resplen) { | |
c48ffbcc | 2915 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63e4288 | 2916 | return 0; |
0f113f3e | 2917 | } |
8cbfcc70 RS |
2918 | s->ext.ocsp.resp = OPENSSL_malloc(resplen); |
2919 | if (s->ext.ocsp.resp == NULL) { | |
39a14059 | 2920 | s->ext.ocsp.resp_len = 0; |
e077455e | 2921 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
f63e4288 | 2922 | return 0; |
0f113f3e | 2923 | } |
39a14059 | 2924 | s->ext.ocsp.resp_len = resplen; |
8cbfcc70 | 2925 | if (!PACKET_copy_bytes(pkt, s->ext.ocsp.resp, resplen)) { |
c48ffbcc | 2926 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63e4288 | 2927 | return 0; |
ac63710a | 2928 | } |
f63e4288 MC |
2929 | |
2930 | return 1; | |
2931 | } | |
2faa1b48 | 2932 | |
f63e4288 | 2933 | |
38b051a1 | 2934 | MSG_PROCESS_RETURN tls_process_cert_status(SSL_CONNECTION *s, PACKET *pkt) |
f63e4288 | 2935 | { |
f63a17d6 MC |
2936 | if (!tls_process_cert_status_body(s, pkt)) { |
2937 | /* SSLfatal() already called */ | |
f63e4288 MC |
2938 | return MSG_PROCESS_ERROR; |
2939 | } | |
2940 | ||
b9908bf9 | 2941 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2942 | } |
d02b48c6 | 2943 | |
7776a36c MC |
2944 | /* |
2945 | * Perform miscellaneous checks and processing after we have received the | |
2946 | * server's initial flight. In TLS1.3 this is after the Server Finished message. | |
6530c490 MC |
2947 | * In <=TLS1.2 this is after the ServerDone message. Returns 1 on success or 0 |
2948 | * on failure. | |
7776a36c | 2949 | */ |
38b051a1 | 2950 | int tls_process_initial_server_flight(SSL_CONNECTION *s) |
b9908bf9 | 2951 | { |
38b051a1 TM |
2952 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
2953 | ||
a455d0f6 MC |
2954 | /* |
2955 | * at this point we check that we have the required stuff from | |
2956 | * the server | |
2957 | */ | |
2958 | if (!ssl3_check_cert_and_algorithm(s)) { | |
f63a17d6 | 2959 | /* SSLfatal() already called */ |
7776a36c | 2960 | return 0; |
a455d0f6 MC |
2961 | } |
2962 | ||
bb1aaab4 | 2963 | /* |
aff8c126 RS |
2964 | * Call the ocsp status callback if needed. The |ext.ocsp.resp| and |
2965 | * |ext.ocsp.resp_len| values will be set if we actually received a status | |
bb1aaab4 MC |
2966 | * message, or NULL and -1 otherwise |
2967 | */ | |
aff8c126 | 2968 | if (s->ext.status_type != TLSEXT_STATUSTYPE_nothing |
38b051a1 | 2969 | && sctx->ext.status_cb != NULL) { |
dc84829c | 2970 | int ret = sctx->ext.status_cb(SSL_CONNECTION_GET_USER_SSL(s), |
38b051a1 | 2971 | sctx->ext.status_arg); |
aff8c126 | 2972 | |
bb1aaab4 | 2973 | if (ret == 0) { |
f63a17d6 | 2974 | SSLfatal(s, SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE, |
f63a17d6 | 2975 | SSL_R_INVALID_STATUS_RESPONSE); |
7776a36c | 2976 | return 0; |
bb1aaab4 MC |
2977 | } |
2978 | if (ret < 0) { | |
c0f4400c DB |
2979 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2980 | SSL_R_OCSP_CALLBACK_FAILURE); | |
7776a36c | 2981 | return 0; |
bb1aaab4 MC |
2982 | } |
2983 | } | |
ed29e82a RP |
2984 | #ifndef OPENSSL_NO_CT |
2985 | if (s->ct_validation_callback != NULL) { | |
43341433 VD |
2986 | /* Note we validate the SCTs whether or not we abort on error */ |
2987 | if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) { | |
f63a17d6 | 2988 | /* SSLfatal() already called */ |
7776a36c | 2989 | return 0; |
ed29e82a RP |
2990 | } |
2991 | } | |
2992 | #endif | |
2993 | ||
7776a36c MC |
2994 | return 1; |
2995 | } | |
2996 | ||
38b051a1 | 2997 | MSG_PROCESS_RETURN tls_process_server_done(SSL_CONNECTION *s, PACKET *pkt) |
7776a36c | 2998 | { |
7776a36c MC |
2999 | if (PACKET_remaining(pkt) > 0) { |
3000 | /* should contain no data */ | |
c48ffbcc | 3001 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 3002 | return MSG_PROCESS_ERROR; |
7776a36c MC |
3003 | } |
3004 | #ifndef OPENSSL_NO_SRP | |
555cbb32 | 3005 | if (s->s3.tmp.new_cipher->algorithm_mkey & SSL_kSRP) { |
76cb077f | 3006 | if (ssl_srp_calc_a_param_intern(s) <= 0) { |
c48ffbcc | 3007 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_SRP_A_CALC); |
f63a17d6 | 3008 | return MSG_PROCESS_ERROR; |
7776a36c MC |
3009 | } |
3010 | } | |
3011 | #endif | |
3012 | ||
f63a17d6 MC |
3013 | if (!tls_process_initial_server_flight(s)) { |
3014 | /* SSLfatal() already called */ | |
3015 | return MSG_PROCESS_ERROR; | |
3016 | } | |
7776a36c | 3017 | |
bd79bcb4 | 3018 | return MSG_PROCESS_FINISHED_READING; |
0f113f3e | 3019 | } |
176f31dd | 3020 | |
38b051a1 | 3021 | static int tls_construct_cke_psk_preamble(SSL_CONNECTION *s, WPACKET *pkt) |
0f113f3e | 3022 | { |
7689082b | 3023 | #ifndef OPENSSL_NO_PSK |
13c0ec4a MC |
3024 | int ret = 0; |
3025 | /* | |
3026 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
3027 | * \0-terminated identity. The last byte is for us for simulating | |
3028 | * strnlen. | |
3029 | */ | |
3030 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
3031 | size_t identitylen = 0; | |
3032 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
3033 | unsigned char *tmppsk = NULL; | |
3034 | char *tmpidentity = NULL; | |
3035 | size_t psklen = 0; | |
3036 | ||
3037 | if (s->psk_client_callback == NULL) { | |
c48ffbcc | 3038 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_PSK_NO_CLIENT_CB); |
13c0ec4a MC |
3039 | goto err; |
3040 | } | |
d02b48c6 | 3041 | |
13c0ec4a | 3042 | memset(identity, 0, sizeof(identity)); |
d02b48c6 | 3043 | |
dc84829c | 3044 | psklen = s->psk_client_callback(SSL_CONNECTION_GET_USER_SSL(s), |
38b051a1 | 3045 | s->session->psk_identity_hint, |
13c0ec4a MC |
3046 | identity, sizeof(identity) - 1, |
3047 | psk, sizeof(psk)); | |
7689082b | 3048 | |
13c0ec4a | 3049 | if (psklen > PSK_MAX_PSK_LEN) { |
c48ffbcc | 3050 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, ERR_R_INTERNAL_ERROR); |
3de7f014 | 3051 | psklen = PSK_MAX_PSK_LEN; /* Avoid overrunning the array on cleanse */ |
13c0ec4a MC |
3052 | goto err; |
3053 | } else if (psklen == 0) { | |
c48ffbcc | 3054 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_PSK_IDENTITY_NOT_FOUND); |
13c0ec4a MC |
3055 | goto err; |
3056 | } | |
7689082b | 3057 | |
13c0ec4a MC |
3058 | identitylen = strlen(identity); |
3059 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
c48ffbcc | 3060 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
3061 | goto err; |
3062 | } | |
7689082b | 3063 | |
13c0ec4a MC |
3064 | tmppsk = OPENSSL_memdup(psk, psklen); |
3065 | tmpidentity = OPENSSL_strdup(identity); | |
3066 | if (tmppsk == NULL || tmpidentity == NULL) { | |
e077455e | 3067 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
13c0ec4a MC |
3068 | goto err; |
3069 | } | |
7689082b | 3070 | |
555cbb32 TS |
3071 | OPENSSL_free(s->s3.tmp.psk); |
3072 | s->s3.tmp.psk = tmppsk; | |
3073 | s->s3.tmp.psklen = psklen; | |
13c0ec4a MC |
3074 | tmppsk = NULL; |
3075 | OPENSSL_free(s->session->psk_identity); | |
3076 | s->session->psk_identity = tmpidentity; | |
3077 | tmpidentity = NULL; | |
f1ec23c0 | 3078 | |
b2b3024e | 3079 | if (!WPACKET_sub_memcpy_u16(pkt, identity, identitylen)) { |
c48ffbcc | 3080 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 MC |
3081 | goto err; |
3082 | } | |
7689082b | 3083 | |
13c0ec4a | 3084 | ret = 1; |
0bce0b02 | 3085 | |
13c0ec4a MC |
3086 | err: |
3087 | OPENSSL_cleanse(psk, psklen); | |
3088 | OPENSSL_cleanse(identity, sizeof(identity)); | |
3089 | OPENSSL_clear_free(tmppsk, psklen); | |
3090 | OPENSSL_clear_free(tmpidentity, identitylen); | |
d02b48c6 | 3091 | |
13c0ec4a MC |
3092 | return ret; |
3093 | #else | |
c48ffbcc | 3094 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
13c0ec4a | 3095 | return 0; |
b9908bf9 | 3096 | #endif |
13c0ec4a | 3097 | } |
b9908bf9 | 3098 | |
38b051a1 | 3099 | static int tls_construct_cke_rsa(SSL_CONNECTION *s, WPACKET *pkt) |
13c0ec4a | 3100 | { |
f1ec23c0 | 3101 | unsigned char *encdata = NULL; |
13c0ec4a MC |
3102 | EVP_PKEY *pkey = NULL; |
3103 | EVP_PKEY_CTX *pctx = NULL; | |
3104 | size_t enclen; | |
3105 | unsigned char *pms = NULL; | |
3106 | size_t pmslen = 0; | |
38b051a1 | 3107 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
b9908bf9 | 3108 | |
3c95ef22 | 3109 | if (!received_server_cert(s)) { |
13c0ec4a MC |
3110 | /* |
3111 | * We should always have a server certificate with SSL_kRSA. | |
3112 | */ | |
c48ffbcc | 3113 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
3114 | return 0; |
3115 | } | |
0f113f3e | 3116 | |
3c95ef22 TS |
3117 | if ((pkey = tls_get_peer_pkey(s)) == NULL) { |
3118 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
3119 | return 0; | |
3120 | } | |
3121 | ||
d7e498ac | 3122 | if (!EVP_PKEY_is_a(pkey, "RSA")) { |
c48ffbcc | 3123 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
3124 | return 0; |
3125 | } | |
0f113f3e | 3126 | |
13c0ec4a MC |
3127 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; |
3128 | pms = OPENSSL_malloc(pmslen); | |
3129 | if (pms == NULL) { | |
e077455e | 3130 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
13c0ec4a MC |
3131 | return 0; |
3132 | } | |
0bce0b02 | 3133 | |
13c0ec4a MC |
3134 | pms[0] = s->client_version >> 8; |
3135 | pms[1] = s->client_version & 0xff; | |
38b051a1 | 3136 | if (RAND_bytes_ex(sctx->libctx, pms + 2, pmslen - 2, 0) <= 0) { |
e077455e | 3137 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_RAND_LIB); |
13c0ec4a MC |
3138 | goto err; |
3139 | } | |
0f113f3e | 3140 | |
13c0ec4a | 3141 | /* Fix buf for TLS and beyond */ |
f1ec23c0 | 3142 | if (s->version > SSL3_VERSION && !WPACKET_start_sub_packet_u16(pkt)) { |
c48ffbcc | 3143 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 MC |
3144 | goto err; |
3145 | } | |
3aceb9ec | 3146 | |
38b051a1 | 3147 | pctx = EVP_PKEY_CTX_new_from_pkey(sctx->libctx, pkey, sctx->propq); |
13c0ec4a MC |
3148 | if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0 |
3149 | || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) { | |
c48ffbcc | 3150 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
13c0ec4a MC |
3151 | goto err; |
3152 | } | |
f1ec23c0 MC |
3153 | if (!WPACKET_allocate_bytes(pkt, enclen, &encdata) |
3154 | || EVP_PKEY_encrypt(pctx, encdata, &enclen, pms, pmslen) <= 0) { | |
c48ffbcc | 3155 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_RSA_ENCRYPT); |
13c0ec4a MC |
3156 | goto err; |
3157 | } | |
13c0ec4a MC |
3158 | EVP_PKEY_CTX_free(pctx); |
3159 | pctx = NULL; | |
0f113f3e | 3160 | |
13c0ec4a | 3161 | /* Fix buf for TLS and beyond */ |
f1ec23c0 | 3162 | if (s->version > SSL3_VERSION && !WPACKET_close(pkt)) { |
c48ffbcc | 3163 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 | 3164 | goto err; |
b9908bf9 | 3165 | } |
13c0ec4a | 3166 | |
2faa1b48 | 3167 | /* Log the premaster secret, if logging is enabled. */ |
a2c2e000 MC |
3168 | if (!ssl_log_rsa_client_key_exchange(s, encdata, enclen, pms, pmslen)) { |
3169 | /* SSLfatal() already called */ | |
2faa1b48 | 3170 | goto err; |
a2c2e000 | 3171 | } |
2faa1b48 | 3172 | |
555cbb32 TS |
3173 | s->s3.tmp.pms = pms; |
3174 | s->s3.tmp.pmslen = pmslen; | |
26fb4b03 | 3175 | |
13c0ec4a MC |
3176 | return 1; |
3177 | err: | |
3178 | OPENSSL_clear_free(pms, pmslen); | |
3179 | EVP_PKEY_CTX_free(pctx); | |
3180 | ||
3181 | return 0; | |
13c0ec4a MC |
3182 | } |
3183 | ||
38b051a1 | 3184 | static int tls_construct_cke_dhe(SSL_CONNECTION *s, WPACKET *pkt) |
a8c1c704 | 3185 | { |
a8c1c704 | 3186 | EVP_PKEY *ckey = NULL, *skey = NULL; |
f1ec23c0 | 3187 | unsigned char *keybytes = NULL; |
807b0a1d | 3188 | int prime_len; |
cb5a427a MC |
3189 | unsigned char *encoded_pub = NULL; |
3190 | size_t encoded_pub_len, pad_len; | |
3191 | int ret = 0; | |
a8c1c704 | 3192 | |
555cbb32 | 3193 | skey = s->s3.peer_tmp; |
a2c2e000 | 3194 | if (skey == NULL) { |
c48ffbcc | 3195 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 | 3196 | goto err; |
a2c2e000 | 3197 | } |
f1ec23c0 | 3198 | |
0f00ed77 | 3199 | ckey = ssl_generate_pkey(s, skey); |
a2c2e000 | 3200 | if (ckey == NULL) { |
c48ffbcc | 3201 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b599ce3b | 3202 | goto err; |
a2c2e000 | 3203 | } |
b599ce3b | 3204 | |
a2c2e000 MC |
3205 | if (ssl_derive(s, ckey, skey, 0) == 0) { |
3206 | /* SSLfatal() already called */ | |
f1ec23c0 | 3207 | goto err; |
a2c2e000 | 3208 | } |
a8c1c704 MC |
3209 | |
3210 | /* send off the data */ | |
cb5a427a MC |
3211 | |
3212 | /* Generate encoding of server key */ | |
3213 | encoded_pub_len = EVP_PKEY_get1_encoded_public_key(ckey, &encoded_pub); | |
3214 | if (encoded_pub_len == 0) { | |
3215 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
10481d33 | 3216 | EVP_PKEY_free(ckey); |
cb5a427a MC |
3217 | return EXT_RETURN_FAIL; |
3218 | } | |
3219 | ||
807b0a1d FM |
3220 | /* |
3221 | * For interoperability with some versions of the Microsoft TLS | |
3222 | * stack, we need to zero pad the DHE pub key to the same length | |
cb5a427a | 3223 | * as the prime. |
807b0a1d | 3224 | */ |
ed576acd | 3225 | prime_len = EVP_PKEY_get_size(ckey); |
cb5a427a MC |
3226 | pad_len = prime_len - encoded_pub_len; |
3227 | if (pad_len > 0) { | |
3228 | if (!WPACKET_sub_allocate_bytes_u16(pkt, pad_len, &keybytes)) { | |
3229 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
3230 | goto err; | |
3231 | } | |
3232 | memset(keybytes, 0, pad_len); | |
3233 | } | |
3234 | ||
3235 | if (!WPACKET_sub_memcpy_u16(pkt, encoded_pub, encoded_pub_len)) { | |
c48ffbcc | 3236 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 | 3237 | goto err; |
a2c2e000 | 3238 | } |
f1ec23c0 | 3239 | |
cb5a427a | 3240 | ret = 1; |
f1ec23c0 | 3241 | err: |
cb5a427a | 3242 | OPENSSL_free(encoded_pub); |
f1ec23c0 | 3243 | EVP_PKEY_free(ckey); |
cb5a427a | 3244 | return ret; |
a8c1c704 MC |
3245 | } |
3246 | ||
38b051a1 | 3247 | static int tls_construct_cke_ecdhe(SSL_CONNECTION *s, WPACKET *pkt) |
67ad5aab | 3248 | { |
67ad5aab | 3249 | unsigned char *encodedPoint = NULL; |
348240c6 | 3250 | size_t encoded_pt_len = 0; |
67ad5aab | 3251 | EVP_PKEY *ckey = NULL, *skey = NULL; |
f1ec23c0 | 3252 | int ret = 0; |
67ad5aab | 3253 | |
555cbb32 | 3254 | skey = s->s3.peer_tmp; |
ec24630a | 3255 | if (skey == NULL) { |
c48ffbcc | 3256 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
3257 | return 0; |
3258 | } | |
3259 | ||
0f00ed77 | 3260 | ckey = ssl_generate_pkey(s, skey); |
b599ce3b | 3261 | if (ckey == NULL) { |
e077455e | 3262 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_SSL_LIB); |
b599ce3b MC |
3263 | goto err; |
3264 | } | |
67ad5aab | 3265 | |
0f1e51ea | 3266 | if (ssl_derive(s, ckey, skey, 0) == 0) { |
a2c2e000 | 3267 | /* SSLfatal() already called */ |
67ad5aab MC |
3268 | goto err; |
3269 | } | |
3270 | ||
3271 | /* Generate encoding of client key */ | |
5ac8fb58 | 3272 | encoded_pt_len = EVP_PKEY_get1_encoded_public_key(ckey, &encodedPoint); |
67ad5aab MC |
3273 | |
3274 | if (encoded_pt_len == 0) { | |
c48ffbcc | 3275 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EC_LIB); |
67ad5aab MC |
3276 | goto err; |
3277 | } | |
3278 | ||
b2b3024e | 3279 | if (!WPACKET_sub_memcpy_u8(pkt, encodedPoint, encoded_pt_len)) { |
c48ffbcc | 3280 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 MC |
3281 | goto err; |
3282 | } | |
67ad5aab | 3283 | |
f1ec23c0 | 3284 | ret = 1; |
67ad5aab | 3285 | err: |
f1ec23c0 | 3286 | OPENSSL_free(encodedPoint); |
67ad5aab | 3287 | EVP_PKEY_free(ckey); |
f1ec23c0 | 3288 | return ret; |
67ad5aab MC |
3289 | } |
3290 | ||
38b051a1 | 3291 | static int tls_construct_cke_gost(SSL_CONNECTION *s, WPACKET *pkt) |
e00e0b3d MC |
3292 | { |
3293 | #ifndef OPENSSL_NO_GOST | |
3294 | /* GOST key exchange message creation */ | |
3295 | EVP_PKEY_CTX *pkey_ctx = NULL; | |
3c95ef22 | 3296 | EVP_PKEY *pkey = NULL; |
e00e0b3d MC |
3297 | size_t msglen; |
3298 | unsigned int md_len; | |
3299 | unsigned char shared_ukm[32], tmp[256]; | |
3300 | EVP_MD_CTX *ukm_hash = NULL; | |
3301 | int dgst_nid = NID_id_GostR3411_94; | |
3302 | unsigned char *pms = NULL; | |
3303 | size_t pmslen = 0; | |
38b051a1 | 3304 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
e00e0b3d | 3305 | |
555cbb32 | 3306 | if ((s->s3.tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0) |
e00e0b3d MC |
3307 | dgst_nid = NID_id_GostR3411_2012_256; |
3308 | ||
3309 | /* | |
1ee4b98e | 3310 | * Get server certificate PKEY and create ctx from it |
e00e0b3d | 3311 | */ |
3c95ef22 | 3312 | if ((pkey = tls_get_peer_pkey(s)) == NULL) { |
c48ffbcc RL |
3313 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
3314 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); | |
e00e0b3d MC |
3315 | return 0; |
3316 | } | |
3317 | ||
38b051a1 | 3318 | pkey_ctx = EVP_PKEY_CTX_new_from_pkey(sctx->libctx, |
3c95ef22 | 3319 | pkey, |
38b051a1 | 3320 | sctx->propq); |
e00e0b3d | 3321 | if (pkey_ctx == NULL) { |
e077455e | 3322 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
e00e0b3d MC |
3323 | return 0; |
3324 | } | |
3325 | /* | |
3326 | * If we have send a certificate, and certificate key | |
3327 | * parameters match those of server certificate, use | |
3328 | * certificate key for key exchange | |
3329 | */ | |
3330 | ||
3331 | /* Otherwise, generate ephemeral key pair */ | |
3332 | pmslen = 32; | |
3333 | pms = OPENSSL_malloc(pmslen); | |
3334 | if (pms == NULL) { | |
e077455e | 3335 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
2f3930bc | 3336 | goto err; |
e00e0b3d MC |
3337 | } |
3338 | ||
3339 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0 | |
348240c6 | 3340 | /* Generate session key |
348240c6 | 3341 | */ |
38b051a1 | 3342 | || RAND_bytes_ex(sctx->libctx, pms, pmslen, 0) <= 0) { |
c48ffbcc | 3343 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
3344 | goto err; |
3345 | }; | |
e00e0b3d MC |
3346 | /* |
3347 | * Compute shared IV and store it in algorithm-specific context | |
3348 | * data | |
3349 | */ | |
3350 | ukm_hash = EVP_MD_CTX_new(); | |
3351 | if (ukm_hash == NULL | |
a230b26e | 3352 | || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0 |
555cbb32 | 3353 | || EVP_DigestUpdate(ukm_hash, s->s3.client_random, |
a230b26e | 3354 | SSL3_RANDOM_SIZE) <= 0 |
555cbb32 | 3355 | || EVP_DigestUpdate(ukm_hash, s->s3.server_random, |
a230b26e EK |
3356 | SSL3_RANDOM_SIZE) <= 0 |
3357 | || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) { | |
c48ffbcc | 3358 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
3359 | goto err; |
3360 | } | |
3361 | EVP_MD_CTX_free(ukm_hash); | |
3362 | ukm_hash = NULL; | |
3363 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
7b1264ba | 3364 | EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) <= 0) { |
c48ffbcc | 3365 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
3366 | goto err; |
3367 | } | |
3368 | /* Make GOST keytransport blob message */ | |
3369 | /* | |
3370 | * Encapsulate it into sequence | |
3371 | */ | |
e00e0b3d MC |
3372 | msglen = 255; |
3373 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) { | |
c48ffbcc | 3374 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
3375 | goto err; |
3376 | } | |
f1ec23c0 | 3377 | |
08029dfa MC |
3378 | if (!WPACKET_put_bytes_u8(pkt, V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED) |
3379 | || (msglen >= 0x80 && !WPACKET_put_bytes_u8(pkt, 0x81)) | |
b2b3024e | 3380 | || !WPACKET_sub_memcpy_u8(pkt, tmp, msglen)) { |
c48ffbcc | 3381 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 | 3382 | goto err; |
e00e0b3d | 3383 | } |
f1ec23c0 | 3384 | |
e00e0b3d | 3385 | EVP_PKEY_CTX_free(pkey_ctx); |
555cbb32 TS |
3386 | s->s3.tmp.pms = pms; |
3387 | s->s3.tmp.pmslen = pmslen; | |
e00e0b3d MC |
3388 | |
3389 | return 1; | |
3390 | err: | |
3391 | EVP_PKEY_CTX_free(pkey_ctx); | |
3392 | OPENSSL_clear_free(pms, pmslen); | |
3393 | EVP_MD_CTX_free(ukm_hash); | |
3394 | return 0; | |
3395 | #else | |
c48ffbcc | 3396 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
3397 | return 0; |
3398 | #endif | |
3399 | } | |
3400 | ||
5a5530a2 | 3401 | #ifndef OPENSSL_NO_GOST |
38b051a1 | 3402 | int ossl_gost18_cke_cipher_nid(const SSL_CONNECTION *s) |
5a5530a2 DB |
3403 | { |
3404 | if ((s->s3.tmp.new_cipher->algorithm_enc & SSL_MAGMA) != 0) | |
3405 | return NID_magma_ctr; | |
3406 | else if ((s->s3.tmp.new_cipher->algorithm_enc & SSL_KUZNYECHIK) != 0) | |
3407 | return NID_kuznyechik_ctr; | |
3408 | ||
3409 | return NID_undef; | |
3410 | } | |
3411 | ||
38b051a1 | 3412 | int ossl_gost_ukm(const SSL_CONNECTION *s, unsigned char *dgst_buf) |
5a5530a2 | 3413 | { |
bbaeadb0 | 3414 | EVP_MD_CTX *hash = NULL; |
5a5530a2 | 3415 | unsigned int md_len; |
38b051a1 TM |
3416 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
3417 | const EVP_MD *md = ssl_evp_md_fetch(sctx->libctx, NID_id_GostR3411_2012_256, | |
3418 | sctx->propq); | |
5a5530a2 DB |
3419 | |
3420 | if (md == NULL) | |
3421 | return 0; | |
3422 | ||
3423 | if ((hash = EVP_MD_CTX_new()) == NULL | |
3424 | || EVP_DigestInit(hash, md) <= 0 | |
3425 | || EVP_DigestUpdate(hash, s->s3.client_random, SSL3_RANDOM_SIZE) <= 0 | |
3426 | || EVP_DigestUpdate(hash, s->s3.server_random, SSL3_RANDOM_SIZE) <= 0 | |
3427 | || EVP_DigestFinal_ex(hash, dgst_buf, &md_len) <= 0) { | |
3428 | EVP_MD_CTX_free(hash); | |
3429 | ssl_evp_md_free(md); | |
3430 | return 0; | |
3431 | } | |
3432 | ||
3433 | EVP_MD_CTX_free(hash); | |
3434 | ssl_evp_md_free(md); | |
3435 | return 1; | |
3436 | } | |
3437 | #endif | |
3438 | ||
38b051a1 | 3439 | static int tls_construct_cke_gost18(SSL_CONNECTION *s, WPACKET *pkt) |
5a5530a2 DB |
3440 | { |
3441 | #ifndef OPENSSL_NO_GOST | |
3442 | /* GOST 2018 key exchange message creation */ | |
2b5e8999 DB |
3443 | unsigned char rnd_dgst[32]; |
3444 | unsigned char *encdata = NULL; | |
5a5530a2 | 3445 | EVP_PKEY_CTX *pkey_ctx = NULL; |
3c95ef22 | 3446 | EVP_PKEY *pkey; |
5a5530a2 DB |
3447 | unsigned char *pms = NULL; |
3448 | size_t pmslen = 0; | |
3449 | size_t msglen; | |
6dd4b77a | 3450 | int cipher_nid = ossl_gost18_cke_cipher_nid(s); |
38b051a1 | 3451 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
5a5530a2 DB |
3452 | |
3453 | if (cipher_nid == NID_undef) { | |
c48ffbcc | 3454 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
5a5530a2 DB |
3455 | return 0; |
3456 | } | |
3457 | ||
6dd4b77a | 3458 | if (ossl_gost_ukm(s, rnd_dgst) <= 0) { |
c48ffbcc | 3459 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
5a5530a2 DB |
3460 | goto err; |
3461 | } | |
3462 | ||
3463 | /* Pre-master secret - random bytes */ | |
3464 | pmslen = 32; | |
3465 | pms = OPENSSL_malloc(pmslen); | |
3466 | if (pms == NULL) { | |
e077455e | 3467 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
5a5530a2 DB |
3468 | goto err; |
3469 | } | |
3470 | ||
38b051a1 | 3471 | if (RAND_bytes_ex(sctx->libctx, pms, pmslen, 0) <= 0) { |
c48ffbcc | 3472 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
5a5530a2 DB |
3473 | goto err; |
3474 | } | |
3475 | ||
3476 | /* Get server certificate PKEY and create ctx from it */ | |
3c95ef22 | 3477 | if ((pkey = tls_get_peer_pkey(s)) == NULL) { |
c48ffbcc RL |
3478 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
3479 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); | |
1b87116a | 3480 | goto err; |
5a5530a2 DB |
3481 | } |
3482 | ||
38b051a1 | 3483 | pkey_ctx = EVP_PKEY_CTX_new_from_pkey(sctx->libctx, |
3c95ef22 | 3484 | pkey, |
38b051a1 | 3485 | sctx->propq); |
5a5530a2 | 3486 | if (pkey_ctx == NULL) { |
e077455e | 3487 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
1b87116a | 3488 | goto err; |
5a5530a2 DB |
3489 | } |
3490 | ||
1287dabd | 3491 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0) { |
c48ffbcc | 3492 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
5a5530a2 DB |
3493 | goto err; |
3494 | }; | |
3495 | ||
3496 | /* Reuse EVP_PKEY_CTRL_SET_IV, make choice in engine code */ | |
3497 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
7b1264ba | 3498 | EVP_PKEY_CTRL_SET_IV, 32, rnd_dgst) <= 0) { |
c48ffbcc | 3499 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_LIBRARY_BUG); |
5a5530a2 DB |
3500 | goto err; |
3501 | } | |
3502 | ||
3503 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
7b1264ba | 3504 | EVP_PKEY_CTRL_CIPHER, cipher_nid, NULL) <= 0) { |
c48ffbcc | 3505 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_LIBRARY_BUG); |
5a5530a2 DB |
3506 | goto err; |
3507 | } | |
3508 | ||
2b5e8999 DB |
3509 | if (EVP_PKEY_encrypt(pkey_ctx, NULL, &msglen, pms, pmslen) <= 0) { |
3510 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); | |
5a5530a2 DB |
3511 | goto err; |
3512 | } | |
3513 | ||
2b5e8999 DB |
3514 | if (!WPACKET_allocate_bytes(pkt, msglen, &encdata) |
3515 | || EVP_PKEY_encrypt(pkey_ctx, encdata, &msglen, pms, pmslen) <= 0) { | |
3516 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); | |
5a5530a2 DB |
3517 | goto err; |
3518 | } | |
3519 | ||
3520 | EVP_PKEY_CTX_free(pkey_ctx); | |
2b5e8999 | 3521 | pkey_ctx = NULL; |
5a5530a2 DB |
3522 | s->s3.tmp.pms = pms; |
3523 | s->s3.tmp.pmslen = pmslen; | |
3524 | ||
3525 | return 1; | |
3526 | err: | |
3527 | EVP_PKEY_CTX_free(pkey_ctx); | |
3528 | OPENSSL_clear_free(pms, pmslen); | |
3529 | return 0; | |
3530 | #else | |
c48ffbcc | 3531 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
5a5530a2 DB |
3532 | return 0; |
3533 | #endif | |
3534 | } | |
3535 | ||
38b051a1 | 3536 | static int tls_construct_cke_srp(SSL_CONNECTION *s, WPACKET *pkt) |
840a2bf8 | 3537 | { |
8b9546c7 | 3538 | #ifndef OPENSSL_NO_SRP |
f1ec23c0 MC |
3539 | unsigned char *abytes = NULL; |
3540 | ||
3541 | if (s->srp_ctx.A == NULL | |
b2b3024e MC |
3542 | || !WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(s->srp_ctx.A), |
3543 | &abytes)) { | |
c48ffbcc | 3544 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
3545 | return 0; |
3546 | } | |
f1ec23c0 MC |
3547 | BN_bn2bin(s->srp_ctx.A, abytes); |
3548 | ||
840a2bf8 MC |
3549 | OPENSSL_free(s->session->srp_username); |
3550 | s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login); | |
3551 | if (s->session->srp_username == NULL) { | |
e077455e | 3552 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
840a2bf8 MC |
3553 | return 0; |
3554 | } | |
3555 | ||
3556 | return 1; | |
3557 | #else | |
c48ffbcc | 3558 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
3559 | return 0; |
3560 | #endif | |
3561 | } | |
3562 | ||
67ec6d2b MC |
3563 | CON_FUNC_RETURN tls_construct_client_key_exchange(SSL_CONNECTION *s, |
3564 | WPACKET *pkt) | |
13c0ec4a | 3565 | { |
13c0ec4a | 3566 | unsigned long alg_k; |
13c0ec4a | 3567 | |
555cbb32 | 3568 | alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
13c0ec4a | 3569 | |
a2c2e000 MC |
3570 | /* |
3571 | * All of the construct functions below call SSLfatal() if necessary so | |
3572 | * no need to do so here. | |
3573 | */ | |
13c0ec4a | 3574 | if ((alg_k & SSL_PSK) |
a2c2e000 | 3575 | && !tls_construct_cke_psk_preamble(s, pkt)) |
13c0ec4a MC |
3576 | goto err; |
3577 | ||
f1ec23c0 | 3578 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
a2c2e000 | 3579 | if (!tls_construct_cke_rsa(s, pkt)) |
13c0ec4a | 3580 | goto err; |
a8c1c704 | 3581 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
a2c2e000 | 3582 | if (!tls_construct_cke_dhe(s, pkt)) |
b9908bf9 | 3583 | goto err; |
67ad5aab | 3584 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
a2c2e000 | 3585 | if (!tls_construct_cke_ecdhe(s, pkt)) |
ce0c1f2b | 3586 | goto err; |
e00e0b3d | 3587 | } else if (alg_k & SSL_kGOST) { |
a2c2e000 | 3588 | if (!tls_construct_cke_gost(s, pkt)) |
a71edf3b | 3589 | goto err; |
5a5530a2 DB |
3590 | } else if (alg_k & SSL_kGOST18) { |
3591 | if (!tls_construct_cke_gost18(s, pkt)) | |
3592 | goto err; | |
840a2bf8 | 3593 | } else if (alg_k & SSL_kSRP) { |
a2c2e000 | 3594 | if (!tls_construct_cke_srp(s, pkt)) |
69f68237 | 3595 | goto err; |
4a424545 | 3596 | } else if (!(alg_k & SSL_kPSK)) { |
c48ffbcc | 3597 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b9908bf9 MC |
3598 | goto err; |
3599 | } | |
3600 | ||
67ec6d2b | 3601 | return CON_FUNC_SUCCESS; |
0f113f3e | 3602 | err: |
555cbb32 TS |
3603 | OPENSSL_clear_free(s->s3.tmp.pms, s->s3.tmp.pmslen); |
3604 | s->s3.tmp.pms = NULL; | |
39a14059 | 3605 | s->s3.tmp.pmslen = 0; |
7689082b | 3606 | #ifndef OPENSSL_NO_PSK |
555cbb32 TS |
3607 | OPENSSL_clear_free(s->s3.tmp.psk, s->s3.tmp.psklen); |
3608 | s->s3.tmp.psk = NULL; | |
39a14059 | 3609 | s->s3.tmp.psklen = 0; |
0f113f3e | 3610 | #endif |
67ec6d2b | 3611 | return CON_FUNC_ERROR; |
b9908bf9 MC |
3612 | } |
3613 | ||
38b051a1 | 3614 | int tls_client_key_exchange_post_work(SSL_CONNECTION *s) |
b9908bf9 MC |
3615 | { |
3616 | unsigned char *pms = NULL; | |
3617 | size_t pmslen = 0; | |
3618 | ||
555cbb32 TS |
3619 | pms = s->s3.tmp.pms; |
3620 | pmslen = s->s3.tmp.pmslen; | |
6f137370 | 3621 | |
b9908bf9 MC |
3622 | #ifndef OPENSSL_NO_SRP |
3623 | /* Check for SRP */ | |
555cbb32 | 3624 | if (s->s3.tmp.new_cipher->algorithm_mkey & SSL_kSRP) { |
b9908bf9 | 3625 | if (!srp_generate_client_master_secret(s)) { |
a2c2e000 | 3626 | /* SSLfatal() already called */ |
b9908bf9 MC |
3627 | goto err; |
3628 | } | |
3629 | return 1; | |
3630 | } | |
3631 | #endif | |
b9908bf9 | 3632 | |
555cbb32 | 3633 | if (pms == NULL && !(s->s3.tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { |
e077455e | 3634 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_PASSED_INVALID_ARGUMENT); |
b9908bf9 MC |
3635 | goto err; |
3636 | } | |
3637 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { | |
a2c2e000 | 3638 | /* SSLfatal() already called */ |
6f137370 MC |
3639 | /* ssl_generate_master_secret frees the pms even on error */ |
3640 | pms = NULL; | |
3641 | pmslen = 0; | |
b9908bf9 MC |
3642 | goto err; |
3643 | } | |
6f137370 MC |
3644 | pms = NULL; |
3645 | pmslen = 0; | |
473483d4 MC |
3646 | |
3647 | #ifndef OPENSSL_NO_SCTP | |
38b051a1 | 3648 | if (SSL_CONNECTION_IS_DTLS(s)) { |
473483d4 MC |
3649 | unsigned char sctpauthkey[64]; |
3650 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
09d62b33 | 3651 | size_t labellen; |
38b051a1 | 3652 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
473483d4 MC |
3653 | |
3654 | /* | |
3655 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP | |
3656 | * used. | |
3657 | */ | |
141eb8c6 MC |
3658 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
3659 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
473483d4 | 3660 | |
09d62b33 MT |
3661 | /* Don't include the terminating zero. */ |
3662 | labellen = sizeof(labelbuffer) - 1; | |
3663 | if (s->mode & SSL_MODE_DTLS_SCTP_LABEL_LENGTH_BUG) | |
3664 | labellen += 1; | |
3665 | ||
38b051a1 | 3666 | if (SSL_export_keying_material(ssl, sctpauthkey, |
a230b26e | 3667 | sizeof(sctpauthkey), labelbuffer, |
09d62b33 | 3668 | labellen, NULL, 0, 0) <= 0) { |
c48ffbcc | 3669 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
473483d4 | 3670 | goto err; |
a2c2e000 | 3671 | } |
473483d4 | 3672 | |
38b051a1 | 3673 | BIO_ctrl(SSL_get_wbio(ssl), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, |
473483d4 MC |
3674 | sizeof(sctpauthkey), sctpauthkey); |
3675 | } | |
3676 | #endif | |
3677 | ||
b9908bf9 MC |
3678 | return 1; |
3679 | err: | |
3680 | OPENSSL_clear_free(pms, pmslen); | |
555cbb32 | 3681 | s->s3.tmp.pms = NULL; |
39a14059 | 3682 | s->s3.tmp.pmslen = 0; |
b9908bf9 | 3683 | return 0; |
0f113f3e | 3684 | } |
d02b48c6 | 3685 | |
0f113f3e MC |
3686 | /* |
3687 | * Check a certificate can be used for client authentication. Currently check | |
3688 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
3689 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 | 3690 | */ |
38b051a1 | 3691 | static int ssl3_check_client_certificate(SSL_CONNECTION *s) |
0f113f3e | 3692 | { |
0f113f3e | 3693 | /* If no suitable signature algorithm can't use certificate */ |
555cbb32 | 3694 | if (!tls_choose_sigalg(s, 0) || s->s3.tmp.sigalg == NULL) |
0f113f3e MC |
3695 | return 0; |
3696 | /* | |
3697 | * If strict mode check suitability of chain before using it. This also | |
3698 | * adjusts suite B digest if necessary. | |
3699 | */ | |
3700 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
3701 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
3702 | return 0; | |
0f113f3e MC |
3703 | return 1; |
3704 | } | |
0d609395 | 3705 | |
38b051a1 | 3706 | WORK_STATE tls_prepare_client_certificate(SSL_CONNECTION *s, WORK_STATE wst) |
0f113f3e MC |
3707 | { |
3708 | X509 *x509 = NULL; | |
3709 | EVP_PKEY *pkey = NULL; | |
3710 | int i; | |
38b051a1 | 3711 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
0f113f3e | 3712 | |
b9908bf9 | 3713 | if (wst == WORK_MORE_A) { |
0f113f3e MC |
3714 | /* Let cert callback update client certificates if required */ |
3715 | if (s->cert->cert_cb) { | |
38b051a1 | 3716 | i = s->cert->cert_cb(ssl, s->cert->cert_cb_arg); |
0f113f3e MC |
3717 | if (i < 0) { |
3718 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3719 | return WORK_MORE_A; |
0f113f3e MC |
3720 | } |
3721 | if (i == 0) { | |
c48ffbcc | 3722 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_CALLBACK_FAILED); |
eb5fd03b | 3723 | return WORK_ERROR; |
0f113f3e MC |
3724 | } |
3725 | s->rwstate = SSL_NOTHING; | |
3726 | } | |
9d75dce3 TS |
3727 | if (ssl3_check_client_certificate(s)) { |
3728 | if (s->post_handshake_auth == SSL_PHA_REQUESTED) { | |
3729 | return WORK_FINISHED_STOP; | |
3730 | } | |
b9908bf9 | 3731 | return WORK_FINISHED_CONTINUE; |
9d75dce3 | 3732 | } |
b9908bf9 MC |
3733 | |
3734 | /* Fall through to WORK_MORE_B */ | |
3735 | wst = WORK_MORE_B; | |
0f113f3e MC |
3736 | } |
3737 | ||
3738 | /* We need to get a client cert */ | |
b9908bf9 | 3739 | if (wst == WORK_MORE_B) { |
0f113f3e MC |
3740 | /* |
3741 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
3742 | * return(-1); We then get retied later | |
3743 | */ | |
0f113f3e MC |
3744 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
3745 | if (i < 0) { | |
3746 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3747 | return WORK_MORE_B; |
0f113f3e MC |
3748 | } |
3749 | s->rwstate = SSL_NOTHING; | |
3750 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
38b051a1 TM |
3751 | if (!SSL_use_certificate(ssl, x509) |
3752 | || !SSL_use_PrivateKey(ssl, pkey)) | |
0f113f3e MC |
3753 | i = 0; |
3754 | } else if (i == 1) { | |
3755 | i = 0; | |
6849b73c | 3756 | ERR_raise(ERR_LIB_SSL, SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
0f113f3e MC |
3757 | } |
3758 | ||
222561fe | 3759 | X509_free(x509); |
25aaa98a | 3760 | EVP_PKEY_free(pkey); |
0f113f3e MC |
3761 | if (i && !ssl3_check_client_certificate(s)) |
3762 | i = 0; | |
3763 | if (i == 0) { | |
3764 | if (s->version == SSL3_VERSION) { | |
555cbb32 | 3765 | s->s3.tmp.cert_req = 0; |
0f113f3e | 3766 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); |
b9908bf9 | 3767 | return WORK_FINISHED_CONTINUE; |
0f113f3e | 3768 | } else { |
555cbb32 | 3769 | s->s3.tmp.cert_req = 2; |
b67cb09f | 3770 | s->ext.compress_certificate_from_peer[0] = TLSEXT_comp_cert_none; |
124037fd | 3771 | if (!ssl3_digest_cached_records(s, 0)) { |
f63a17d6 | 3772 | /* SSLfatal() already called */ |
eb5fd03b | 3773 | return WORK_ERROR; |
dab18ab5 | 3774 | } |
0f113f3e MC |
3775 | } |
3776 | } | |
3777 | ||
b67cb09f TS |
3778 | if (!SSL_CONNECTION_IS_TLS13(s) |
3779 | || (s->options & SSL_OP_NO_TX_CERTIFICATE_COMPRESSION) != 0) | |
3780 | s->ext.compress_certificate_from_peer[0] = TLSEXT_comp_cert_none; | |
3781 | ||
9d75dce3 TS |
3782 | if (s->post_handshake_auth == SSL_PHA_REQUESTED) |
3783 | return WORK_FINISHED_STOP; | |
b9908bf9 | 3784 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3785 | } |
3786 | ||
b9908bf9 | 3787 | /* Shouldn't ever get here */ |
c48ffbcc | 3788 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b9908bf9 MC |
3789 | return WORK_ERROR; |
3790 | } | |
3791 | ||
67ec6d2b MC |
3792 | CON_FUNC_RETURN tls_construct_client_certificate(SSL_CONNECTION *s, |
3793 | WPACKET *pkt) | |
b9908bf9 | 3794 | { |
3c95ef22 | 3795 | CERT_PKEY *cpk = NULL; |
38b051a1 TM |
3796 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
3797 | ||
3798 | if (SSL_CONNECTION_IS_TLS13(s)) { | |
9d75dce3 TS |
3799 | if (s->pha_context == NULL) { |
3800 | /* no context available, add 0-length context */ | |
3801 | if (!WPACKET_put_bytes_u8(pkt, 0)) { | |
c48ffbcc | 3802 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 3803 | return CON_FUNC_ERROR; |
9d75dce3 TS |
3804 | } |
3805 | } else if (!WPACKET_sub_memcpy_u8(pkt, s->pha_context, s->pha_context_len)) { | |
c48ffbcc | 3806 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 3807 | return CON_FUNC_ERROR; |
9d75dce3 | 3808 | } |
f63a17d6 | 3809 | } |
3c95ef22 TS |
3810 | if (s->s3.tmp.cert_req != 2) |
3811 | cpk = s->cert->key; | |
3812 | switch (s->ext.client_cert_type) { | |
3813 | case TLSEXT_cert_type_rpk: | |
3814 | if (!tls_output_rpk(s, pkt, cpk)) { | |
3815 | /* SSLfatal() already called */ | |
3816 | return CON_FUNC_ERROR; | |
3817 | } | |
3818 | break; | |
3819 | case TLSEXT_cert_type_x509: | |
3820 | if (!ssl3_output_cert_chain(s, pkt, cpk, 0)) { | |
3821 | /* SSLfatal() already called */ | |
3822 | return CON_FUNC_ERROR; | |
3823 | } | |
3824 | break; | |
3825 | default: | |
3826 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
67ec6d2b | 3827 | return CON_FUNC_ERROR; |
f7e393be MC |
3828 | } |
3829 | ||
84a14925 MC |
3830 | /* |
3831 | * If we attempted to write early data or we're in middlebox compat mode | |
3832 | * then we deferred changing the handshake write keys to the last possible | |
3833 | * moment. We need to do it now. | |
3834 | */ | |
38b051a1 | 3835 | if (SSL_CONNECTION_IS_TLS13(s) |
86e75792 | 3836 | && !SSL_IS_QUIC_HANDSHAKE(s) |
f7e393be | 3837 | && SSL_IS_FIRST_HANDSHAKE(s) |
84a14925 MC |
3838 | && (s->early_data_state != SSL_EARLY_DATA_NONE |
3839 | || (s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0) | |
38b051a1 | 3840 | && (!ssl->method->ssl3_enc->change_cipher_state(s, |
f7e393be | 3841 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE))) { |
c31ad0bb | 3842 | /* |
a2c2e000 | 3843 | * This is a fatal error, which leaves enc_write_ctx in an inconsistent |
f63a17d6 | 3844 | * state and thus ssl3_send_alert may crash. |
c31ad0bb | 3845 | */ |
c48ffbcc | 3846 | SSLfatal(s, SSL_AD_NO_ALERT, SSL_R_CANNOT_CHANGE_CIPHER); |
67ec6d2b | 3847 | return CON_FUNC_ERROR; |
0f113f3e | 3848 | } |
b9908bf9 | 3849 | |
67ec6d2b | 3850 | return CON_FUNC_SUCCESS; |
0f113f3e MC |
3851 | } |
3852 | ||
b67cb09f TS |
3853 | #ifndef OPENSSL_NO_COMP_ALG |
3854 | CON_FUNC_RETURN tls_construct_client_compressed_certificate(SSL_CONNECTION *sc, | |
3855 | WPACKET *pkt) | |
3856 | { | |
3857 | SSL *ssl = SSL_CONNECTION_GET_SSL(sc); | |
3858 | WPACKET tmppkt; | |
3859 | BUF_MEM *buf = NULL; | |
3860 | size_t length; | |
3861 | size_t max_length; | |
3862 | COMP_METHOD *method; | |
3863 | COMP_CTX *comp = NULL; | |
3864 | int comp_len; | |
3865 | int ret = 0; | |
3866 | int alg = sc->ext.compress_certificate_from_peer[0]; | |
3867 | ||
3868 | /* Note that sc->s3.tmp.cert_req == 2 is checked in write transition */ | |
3869 | ||
3870 | if ((buf = BUF_MEM_new()) == NULL || !WPACKET_init(&tmppkt, buf)) | |
3871 | goto err; | |
3872 | ||
3873 | /* Use the |tmppkt| for the to-be-compressed data */ | |
3874 | if (sc->pha_context == NULL) { | |
3875 | /* no context available, add 0-length context */ | |
3876 | if (!WPACKET_put_bytes_u8(&tmppkt, 0)) | |
3877 | goto err; | |
3878 | } else if (!WPACKET_sub_memcpy_u8(&tmppkt, sc->pha_context, sc->pha_context_len)) | |
3879 | goto err; | |
3880 | ||
72620ac7 | 3881 | if (!ssl3_output_cert_chain(sc, &tmppkt, sc->cert->key, 0)) { |
b67cb09f TS |
3882 | /* SSLfatal() already called */ |
3883 | goto out; | |
3884 | } | |
3885 | ||
3886 | /* continue with the real |pkt| */ | |
3887 | if (!WPACKET_put_bytes_u16(pkt, alg) | |
3888 | || !WPACKET_get_total_written(&tmppkt, &length) | |
3889 | || !WPACKET_put_bytes_u24(pkt, length)) | |
3890 | goto err; | |
3891 | ||
3892 | switch (alg) { | |
3893 | case TLSEXT_comp_cert_zlib: | |
3840271e | 3894 | method = COMP_zlib_oneshot(); |
b67cb09f TS |
3895 | break; |
3896 | case TLSEXT_comp_cert_brotli: | |
3897 | method = COMP_brotli_oneshot(); | |
3898 | break; | |
3899 | case TLSEXT_comp_cert_zstd: | |
3900 | method = COMP_zstd_oneshot(); | |
3901 | break; | |
3902 | default: | |
3903 | goto err; | |
3904 | } | |
3905 | max_length = ossl_calculate_comp_expansion(alg, length); | |
3906 | ||
7e3cacac TS |
3907 | if ((comp = COMP_CTX_new(method)) == NULL |
3908 | || !WPACKET_start_sub_packet_u24(pkt) | |
3909 | || !WPACKET_reserve_bytes(pkt, max_length, NULL)) | |
b67cb09f TS |
3910 | goto err; |
3911 | ||
abdbad37 TM |
3912 | comp_len = COMP_compress_block(comp, WPACKET_get_curr(pkt), (int)max_length, |
3913 | (unsigned char *)buf->data, (int)length); | |
b67cb09f TS |
3914 | if (comp_len <= 0) |
3915 | goto err; | |
3916 | ||
3917 | if (!WPACKET_allocate_bytes(pkt, comp_len, NULL) | |
3918 | || !WPACKET_close(pkt)) | |
3919 | goto err; | |
3920 | ||
84a14925 MC |
3921 | /* |
3922 | * If we attempted to write early data or we're in middlebox compat mode | |
3923 | * then we deferred changing the handshake write keys to the last possible | |
3924 | * moment. We need to do it now. | |
3925 | */ | |
b67cb09f | 3926 | if (SSL_IS_FIRST_HANDSHAKE(sc) |
86e75792 | 3927 | && !SSL_IS_QUIC_HANDSHAKE(sc) |
84a14925 MC |
3928 | && (sc->early_data_state != SSL_EARLY_DATA_NONE |
3929 | || (sc->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0) | |
b67cb09f TS |
3930 | && (!ssl->method->ssl3_enc->change_cipher_state(sc, |
3931 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE))) { | |
3932 | /* | |
3933 | * This is a fatal error, which leaves sc->enc_write_ctx in an | |
3934 | * inconsistent state and thus ssl3_send_alert may crash. | |
3935 | */ | |
3936 | SSLfatal(sc, SSL_AD_NO_ALERT, SSL_R_CANNOT_CHANGE_CIPHER); | |
3937 | goto out; | |
3938 | } | |
3939 | ret = 1; | |
3940 | goto out; | |
3941 | ||
3942 | err: | |
3943 | SSLfatal(sc, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
3944 | out: | |
d06d5d6b TS |
3945 | if (buf != NULL) { |
3946 | /* If |buf| is NULL, then |tmppkt| could not have been initialized */ | |
3947 | WPACKET_cleanup(&tmppkt); | |
3948 | } | |
b67cb09f TS |
3949 | BUF_MEM_free(buf); |
3950 | COMP_CTX_free(comp); | |
3951 | return ret; | |
3952 | } | |
3953 | #endif | |
3954 | ||
38b051a1 | 3955 | int ssl3_check_cert_and_algorithm(SSL_CONNECTION *s) |
0f113f3e | 3956 | { |
dd24857b DSH |
3957 | const SSL_CERT_LOOKUP *clu; |
3958 | size_t idx; | |
0f113f3e | 3959 | long alg_k, alg_a; |
3c95ef22 | 3960 | EVP_PKEY *pkey; |
d02b48c6 | 3961 | |
555cbb32 TS |
3962 | alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
3963 | alg_a = s->s3.tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 3964 | |
0f113f3e | 3965 | /* we don't have a certificate */ |
dd24857b DSH |
3966 | if (!(alg_a & SSL_aCERT)) |
3967 | return 1; | |
d02b48c6 | 3968 | |
0f113f3e | 3969 | /* This is the passed certificate */ |
3c95ef22 TS |
3970 | pkey = tls_get_peer_pkey(s); |
3971 | clu = ssl_cert_lookup_by_pkey(pkey, &idx, SSL_CONNECTION_GET_CTX(s)); | |
d02b48c6 | 3972 | |
dd24857b DSH |
3973 | /* Check certificate is recognised and suitable for cipher */ |
3974 | if (clu == NULL || (alg_a & clu->amask) == 0) { | |
c48ffbcc | 3975 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_MISSING_SIGNING_CERT); |
f63a17d6 | 3976 | return 0; |
0f113f3e | 3977 | } |
0f113f3e | 3978 | |
dd24857b | 3979 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK) && idx != SSL_PKEY_RSA) { |
f63a17d6 | 3980 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
f63a17d6 MC |
3981 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); |
3982 | return 0; | |
0f113f3e | 3983 | } |
5b64ce89 | 3984 | |
555cbb32 | 3985 | if ((alg_k & SSL_kDHE) && (s->s3.peer_tmp == NULL)) { |
c48ffbcc | 3986 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f63a17d6 | 3987 | return 0; |
0f113f3e | 3988 | } |
d02b48c6 | 3989 | |
3c95ef22 TS |
3990 | /* Early out to skip the checks below */ |
3991 | if (s->session->peer_rpk != NULL) | |
3992 | return 1; | |
3993 | ||
3994 | if (clu->amask & SSL_aECDSA) { | |
3995 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s)) | |
3996 | return 1; | |
3997 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_BAD_ECC_CERT); | |
3998 | return 0; | |
3999 | } | |
4000 | ||
dd24857b | 4001 | return 1; |
0f113f3e MC |
4002 | } |
4003 | ||
e481f9b9 | 4004 | #ifndef OPENSSL_NO_NEXTPROTONEG |
67ec6d2b | 4005 | CON_FUNC_RETURN tls_construct_next_proto(SSL_CONNECTION *s, WPACKET *pkt) |
b9908bf9 | 4006 | { |
15e6be6c MC |
4007 | size_t len, padding_len; |
4008 | unsigned char *padding = NULL; | |
15e6be6c | 4009 | |
aff8c126 | 4010 | len = s->ext.npn_len; |
b9908bf9 | 4011 | padding_len = 32 - ((len + 2) % 32); |
15e6be6c | 4012 | |
aff8c126 | 4013 | if (!WPACKET_sub_memcpy_u8(pkt, s->ext.npn, len) |
7cea05dc | 4014 | || !WPACKET_sub_allocate_bytes_u8(pkt, padding_len, &padding)) { |
c48ffbcc | 4015 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 4016 | return CON_FUNC_ERROR; |
15e6be6c MC |
4017 | } |
4018 | ||
4019 | memset(padding, 0, padding_len); | |
4020 | ||
67ec6d2b | 4021 | return CON_FUNC_SUCCESS; |
b9908bf9 | 4022 | } |
6434abbf | 4023 | #endif |
368888bc | 4024 | |
38b051a1 | 4025 | MSG_PROCESS_RETURN tls_process_hello_req(SSL_CONNECTION *s, PACKET *pkt) |
c7f47786 | 4026 | { |
38b051a1 TM |
4027 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
4028 | ||
c7f47786 MC |
4029 | if (PACKET_remaining(pkt) > 0) { |
4030 | /* should contain no data */ | |
c48ffbcc | 4031 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
c7f47786 MC |
4032 | return MSG_PROCESS_ERROR; |
4033 | } | |
4034 | ||
db0f35dd TS |
4035 | if ((s->options & SSL_OP_NO_RENEGOTIATION)) { |
4036 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_RENEGOTIATION); | |
4037 | return MSG_PROCESS_FINISHED_READING; | |
4038 | } | |
4039 | ||
c7f47786 | 4040 | /* |
1f04f23e MC |
4041 | * This is a historical discrepancy (not in the RFC) maintained for |
4042 | * compatibility reasons. If a TLS client receives a HelloRequest it will | |
4043 | * attempt an abbreviated handshake. However if a DTLS client receives a | |
4044 | * HelloRequest it will do a full handshake. Either behaviour is reasonable | |
4045 | * but doing one for TLS and another for DTLS is odd. | |
c7f47786 | 4046 | */ |
38b051a1 TM |
4047 | if (SSL_CONNECTION_IS_DTLS(s)) |
4048 | SSL_renegotiate(ssl); | |
c7f47786 | 4049 | else |
38b051a1 | 4050 | SSL_renegotiate_abbreviated(ssl); |
c7f47786 MC |
4051 | |
4052 | return MSG_PROCESS_FINISHED_READING; | |
4053 | } | |
4054 | ||
38b051a1 TM |
4055 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL_CONNECTION *s, |
4056 | PACKET *pkt) | |
e46f2334 | 4057 | { |
e46f2334 | 4058 | PACKET extensions; |
3434f40b | 4059 | RAW_EXTENSION *rawexts = NULL; |
e46f2334 | 4060 | |
26b9172a MC |
4061 | if (!PACKET_as_length_prefixed_2(pkt, &extensions) |
4062 | || PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 4063 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
e46f2334 MC |
4064 | goto err; |
4065 | } | |
4066 | ||
fe874d27 MC |
4067 | if (!tls_collect_extensions(s, &extensions, |
4068 | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, &rawexts, | |
f63a17d6 | 4069 | NULL, 1) |
fe874d27 | 4070 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, |
f63a17d6 MC |
4071 | rawexts, NULL, 0, 1)) { |
4072 | /* SSLfatal() already called */ | |
3434f40b | 4073 | goto err; |
f63a17d6 | 4074 | } |
3434f40b | 4075 | |
1b0286a3 | 4076 | OPENSSL_free(rawexts); |
e46f2334 MC |
4077 | return MSG_PROCESS_CONTINUE_READING; |
4078 | ||
4079 | err: | |
1b0286a3 | 4080 | OPENSSL_free(rawexts); |
e46f2334 MC |
4081 | return MSG_PROCESS_ERROR; |
4082 | } | |
4083 | ||
38b051a1 | 4084 | int ssl_do_client_cert_cb(SSL_CONNECTION *s, X509 **px509, EVP_PKEY **ppkey) |
0f113f3e MC |
4085 | { |
4086 | int i = 0; | |
38b051a1 TM |
4087 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
4088 | ||
368888bc | 4089 | #ifndef OPENSSL_NO_ENGINE |
38b051a1 | 4090 | if (sctx->client_cert_engine) { |
301fcb28 | 4091 | i = tls_engine_load_ssl_client_cert(s, px509, ppkey); |
0f113f3e MC |
4092 | if (i != 0) |
4093 | return i; | |
4094 | } | |
4095 | #endif | |
38b051a1 | 4096 | if (sctx->client_cert_cb) |
dc84829c | 4097 | i = sctx->client_cert_cb(SSL_CONNECTION_GET_USER_SSL(s), px509, ppkey); |
0f113f3e MC |
4098 | return i; |
4099 | } | |
d45ba43d | 4100 | |
38b051a1 TM |
4101 | int ssl_cipher_list_to_bytes(SSL_CONNECTION *s, STACK_OF(SSL_CIPHER) *sk, |
4102 | WPACKET *pkt) | |
d45ba43d | 4103 | { |
2c7b4dbc | 4104 | int i; |
aafec89c | 4105 | size_t totlen = 0, len, maxlen, maxverok = 0; |
1eef26bd | 4106 | int empty_reneg_info_scsv = !s->renegotiate |
972ee925 TP |
4107 | && !SSL_CONNECTION_IS_DTLS(s) |
4108 | && ssl_security(s, SSL_SECOP_VERSION, 0, TLS1_VERSION, NULL) | |
4109 | && s->min_proto_version <= TLS1_VERSION; | |
38b051a1 | 4110 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
1d0c08b4 | 4111 | |
d45ba43d | 4112 | /* Set disabled masks for this session */ |
1d0c08b4 | 4113 | if (!ssl_set_client_disabled(s)) { |
c48ffbcc | 4114 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_NO_PROTOCOLS_AVAILABLE); |
1d0c08b4 MC |
4115 | return 0; |
4116 | } | |
d45ba43d | 4117 | |
f63a17d6 | 4118 | if (sk == NULL) { |
c48ffbcc | 4119 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
26a7d938 | 4120 | return 0; |
f63a17d6 | 4121 | } |
d45ba43d | 4122 | |
2c7b4dbc MC |
4123 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
4124 | # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6 | |
4125 | # error Max cipher length too short | |
4126 | # endif | |
4127 | /* | |
4128 | * Some servers hang if client hello > 256 bytes as hack workaround | |
4129 | * chop number of supported ciphers to keep it well below this if we | |
4130 | * use TLS v1.2 | |
4131 | */ | |
38b051a1 | 4132 | if (TLS1_get_version(ssl) >= TLS1_2_VERSION) |
2c7b4dbc MC |
4133 | maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; |
4134 | else | |
4135 | #endif | |
4136 | /* Maximum length that can be stored in 2 bytes. Length must be even */ | |
4137 | maxlen = 0xfffe; | |
4138 | ||
4139 | if (empty_reneg_info_scsv) | |
4140 | maxlen -= 2; | |
4141 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) | |
4142 | maxlen -= 2; | |
4143 | ||
4144 | for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) { | |
4145 | const SSL_CIPHER *c; | |
4146 | ||
d45ba43d MC |
4147 | c = sk_SSL_CIPHER_value(sk, i); |
4148 | /* Skip disabled ciphers */ | |
8af91fd9 | 4149 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0)) |
d45ba43d | 4150 | continue; |
2c7b4dbc | 4151 | |
38b051a1 | 4152 | if (!ssl->method->put_cipher_by_char(c, pkt, &len)) { |
c48ffbcc | 4153 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
2c7b4dbc MC |
4154 | return 0; |
4155 | } | |
4156 | ||
aafec89c MC |
4157 | /* Sanity check that the maximum version we offer has ciphers enabled */ |
4158 | if (!maxverok) { | |
6fd37948 FWH |
4159 | int minproto = SSL_CONNECTION_IS_DTLS(s) ? c->min_dtls : c->min_tls; |
4160 | int maxproto = SSL_CONNECTION_IS_DTLS(s) ? c->max_dtls : c->max_tls; | |
4161 | ||
4162 | if (ssl_version_cmp(s, maxproto, s->s3.tmp.max_ver) >= 0 | |
4163 | && ssl_version_cmp(s, minproto, s->s3.tmp.max_ver) <= 0) | |
4164 | maxverok = 1; | |
aafec89c MC |
4165 | } |
4166 | ||
2c7b4dbc | 4167 | totlen += len; |
d45ba43d | 4168 | } |
2c7b4dbc | 4169 | |
aafec89c | 4170 | if (totlen == 0 || !maxverok) { |
c48ffbcc RL |
4171 | const char *maxvertext = |
4172 | !maxverok | |
4173 | ? "No ciphers enabled for max supported SSL/TLS version" | |
4174 | : NULL; | |
aafec89c | 4175 | |
c48ffbcc RL |
4176 | SSLfatal_data(s, SSL_AD_INTERNAL_ERROR, SSL_R_NO_CIPHERS_AVAILABLE, |
4177 | maxvertext); | |
2c7b4dbc MC |
4178 | return 0; |
4179 | } | |
4180 | ||
4181 | if (totlen != 0) { | |
d45ba43d | 4182 | if (empty_reneg_info_scsv) { |
c30aee71 | 4183 | static const SSL_CIPHER scsv = { |
bbb4ceb8 | 4184 | 0, NULL, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 |
d45ba43d | 4185 | }; |
38b051a1 | 4186 | if (!ssl->method->put_cipher_by_char(&scsv, pkt, &len)) { |
c48ffbcc | 4187 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
2c7b4dbc MC |
4188 | return 0; |
4189 | } | |
d45ba43d MC |
4190 | } |
4191 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
c30aee71 | 4192 | static const SSL_CIPHER scsv = { |
bbb4ceb8 | 4193 | 0, NULL, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 |
d45ba43d | 4194 | }; |
38b051a1 | 4195 | if (!ssl->method->put_cipher_by_char(&scsv, pkt, &len)) { |
c48ffbcc | 4196 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
2c7b4dbc MC |
4197 | return 0; |
4198 | } | |
d45ba43d MC |
4199 | } |
4200 | } | |
4201 | ||
2c7b4dbc | 4202 | return 1; |
d45ba43d | 4203 | } |
ef6c191b | 4204 | |
67ec6d2b | 4205 | CON_FUNC_RETURN tls_construct_end_of_early_data(SSL_CONNECTION *s, WPACKET *pkt) |
ef6c191b MC |
4206 | { |
4207 | if (s->early_data_state != SSL_EARLY_DATA_WRITE_RETRY | |
4208 | && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING) { | |
c48ffbcc | 4209 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
67ec6d2b | 4210 | return CON_FUNC_ERROR; |
ef6c191b MC |
4211 | } |
4212 | ||
4213 | s->early_data_state = SSL_EARLY_DATA_FINISHED_WRITING; | |
67ec6d2b | 4214 | return CON_FUNC_SUCCESS; |
ef6c191b | 4215 | } |