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846e33c7 | 1 | /* |
3c95ef22 | 2 | * Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved. |
aa8f3d76 | 3 | * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved |
c80149d9 | 4 | * Copyright 2005 Nokia. All rights reserved. |
8c74b5e5 | 5 | * |
2c18d164 | 6 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
846e33c7 RS |
7 | * this file except in compliance with the License. You can obtain a copy |
8 | * in the file LICENSE in the source distribution or at | |
9 | * https://www.openssl.org/source/license.html | |
8c74b5e5 | 10 | */ |
846e33c7 | 11 | |
d02b48c6 | 12 | #include <stdio.h> |
fc24f0bf | 13 | #include <time.h> |
dee0cc10 | 14 | #include <assert.h> |
706457b7 DMSP |
15 | #include "../ssl_local.h" |
16 | #include "statem_local.h" | |
ec577822 BM |
17 | #include <openssl/buffer.h> |
18 | #include <openssl/rand.h> | |
19 | #include <openssl/objects.h> | |
20 | #include <openssl/evp.h> | |
dbad1690 | 21 | #include <openssl/md5.h> |
3c27208f | 22 | #include <openssl/dh.h> |
d7e498ac | 23 | #include <openssl/rsa.h> |
d095b68d | 24 | #include <openssl/bn.h> |
3c27208f | 25 | #include <openssl/engine.h> |
49b26f54 | 26 | #include <openssl/trace.h> |
1ee22dc2 MC |
27 | #include <openssl/core_names.h> |
28 | #include <openssl/param_build.h> | |
449bdf37 | 29 | #include "internal/cryptlib.h" |
f9b3bff6 | 30 | |
38b051a1 TM |
31 | static MSG_PROCESS_RETURN tls_process_as_hello_retry_request(SSL_CONNECTION *s, |
32 | PACKET *pkt); | |
33 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL_CONNECTION *s, | |
34 | PACKET *pkt); | |
35 | ||
36 | static ossl_inline int cert_req_allowed(SSL_CONNECTION *s); | |
37 | static int key_exchange_expected(SSL_CONNECTION *s); | |
38 | static int ssl_cipher_list_to_bytes(SSL_CONNECTION *s, STACK_OF(SSL_CIPHER) *sk, | |
ae2f7b37 | 39 | WPACKET *pkt); |
ea262260 | 40 | |
3c95ef22 TS |
41 | static ossl_inline int received_server_cert(SSL_CONNECTION *sc) |
42 | { | |
43 | return sc->session->peer_rpk != NULL || sc->session->peer != NULL; | |
44 | } | |
45 | ||
61ae935a MC |
46 | /* |
47 | * Is a CertificateRequest message allowed at the moment or not? | |
48 | * | |
49 | * Return values are: | |
50 | * 1: Yes | |
51 | * 0: No | |
52 | */ | |
38b051a1 | 53 | static ossl_inline int cert_req_allowed(SSL_CONNECTION *s) |
61ae935a MC |
54 | { |
55 | /* TLS does not like anon-DH with client cert */ | |
b7fa1f98 | 56 | if ((s->version > SSL3_VERSION |
555cbb32 TS |
57 | && (s->s3.tmp.new_cipher->algorithm_auth & SSL_aNULL)) |
58 | || (s->s3.tmp.new_cipher->algorithm_auth & (SSL_aSRP | SSL_aPSK))) | |
61ae935a MC |
59 | return 0; |
60 | ||
61 | return 1; | |
62 | } | |
63 | ||
64 | /* | |
a455d0f6 | 65 | * Should we expect the ServerKeyExchange message or not? |
61ae935a MC |
66 | * |
67 | * Return values are: | |
68 | * 1: Yes | |
69 | * 0: No | |
70 | */ | |
38b051a1 | 71 | static int key_exchange_expected(SSL_CONNECTION *s) |
61ae935a | 72 | { |
555cbb32 | 73 | long alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
61ae935a MC |
74 | |
75 | /* | |
76 | * Can't skip server key exchange if this is an ephemeral | |
a455d0f6 | 77 | * ciphersuite or for SRP |
61ae935a | 78 | */ |
a455d0f6 MC |
79 | if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK |
80 | | SSL_kSRP)) { | |
81 | return 1; | |
61ae935a MC |
82 | } |
83 | ||
a455d0f6 | 84 | return 0; |
61ae935a MC |
85 | } |
86 | ||
0f1e51ea MC |
87 | /* |
88 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed | |
89 | * handshake state transitions when a TLS1.3 client is reading messages from the | |
90 | * server. The message type that the server has sent is provided in |mt|. The | |
91 | * current state is in |s->statem.hand_state|. | |
92 | * | |
94ed2c67 MC |
93 | * Return values are 1 for success (transition allowed) and 0 on error |
94 | * (transition not allowed) | |
0f1e51ea | 95 | */ |
38b051a1 | 96 | static int ossl_statem_client13_read_transition(SSL_CONNECTION *s, int mt) |
0f1e51ea MC |
97 | { |
98 | OSSL_STATEM *st = &s->statem; | |
99 | ||
100 | /* | |
101 | * Note: There is no case for TLS_ST_CW_CLNT_HELLO, because we haven't | |
102 | * yet negotiated TLSv1.3 at that point so that is handled by | |
103 | * ossl_statem_client_read_transition() | |
104 | */ | |
105 | ||
106 | switch (st->hand_state) { | |
107 | default: | |
108 | break; | |
109 | ||
3847d426 MC |
110 | case TLS_ST_CW_CLNT_HELLO: |
111 | /* | |
112 | * This must a ClientHello following a HelloRetryRequest, so the only | |
113 | * thing we can get now is a ServerHello. | |
114 | */ | |
115 | if (mt == SSL3_MT_SERVER_HELLO) { | |
116 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
117 | return 1; | |
118 | } | |
119 | break; | |
120 | ||
0f1e51ea | 121 | case TLS_ST_CR_SRVR_HELLO: |
e46f2334 MC |
122 | if (mt == SSL3_MT_ENCRYPTED_EXTENSIONS) { |
123 | st->hand_state = TLS_ST_CR_ENCRYPTED_EXTENSIONS; | |
124 | return 1; | |
125 | } | |
126 | break; | |
127 | ||
128 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
0f1e51ea | 129 | if (s->hit) { |
92760c21 MC |
130 | if (mt == SSL3_MT_FINISHED) { |
131 | st->hand_state = TLS_ST_CR_FINISHED; | |
0f1e51ea MC |
132 | return 1; |
133 | } | |
134 | } else { | |
92760c21 MC |
135 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { |
136 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
137 | return 1; | |
f5ca0b04 MC |
138 | } |
139 | if (mt == SSL3_MT_CERTIFICATE) { | |
0f1e51ea MC |
140 | st->hand_state = TLS_ST_CR_CERT; |
141 | return 1; | |
142 | } | |
b67cb09f TS |
143 | #ifndef OPENSSL_NO_COMP_ALG |
144 | if (mt == SSL3_MT_COMPRESSED_CERTIFICATE | |
145 | && s->ext.compress_certificate_sent) { | |
146 | st->hand_state = TLS_ST_CR_COMP_CERT; | |
147 | return 1; | |
148 | } | |
149 | #endif | |
0f1e51ea MC |
150 | } |
151 | break; | |
152 | ||
92760c21 MC |
153 | case TLS_ST_CR_CERT_REQ: |
154 | if (mt == SSL3_MT_CERTIFICATE) { | |
155 | st->hand_state = TLS_ST_CR_CERT; | |
156 | return 1; | |
157 | } | |
b67cb09f TS |
158 | #ifndef OPENSSL_NO_COMP_ALG |
159 | if (mt == SSL3_MT_COMPRESSED_CERTIFICATE | |
160 | && s->ext.compress_certificate_sent) { | |
161 | st->hand_state = TLS_ST_CR_COMP_CERT; | |
162 | return 1; | |
163 | } | |
164 | #endif | |
92760c21 MC |
165 | break; |
166 | ||
0f1e51ea | 167 | case TLS_ST_CR_CERT: |
b67cb09f | 168 | case TLS_ST_CR_COMP_CERT: |
2c5dfdc3 MC |
169 | if (mt == SSL3_MT_CERTIFICATE_VERIFY) { |
170 | st->hand_state = TLS_ST_CR_CERT_VRFY; | |
171 | return 1; | |
172 | } | |
173 | break; | |
174 | ||
175 | case TLS_ST_CR_CERT_VRFY: | |
0f1e51ea MC |
176 | if (mt == SSL3_MT_FINISHED) { |
177 | st->hand_state = TLS_ST_CR_FINISHED; | |
178 | return 1; | |
179 | } | |
180 | break; | |
cc2455bf MC |
181 | |
182 | case TLS_ST_OK: | |
183 | if (mt == SSL3_MT_NEWSESSION_TICKET) { | |
184 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
185 | return 1; | |
186 | } | |
e1c3de44 MC |
187 | if (mt == SSL3_MT_KEY_UPDATE) { |
188 | st->hand_state = TLS_ST_CR_KEY_UPDATE; | |
189 | return 1; | |
190 | } | |
9d75dce3 | 191 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { |
5c587fb6 | 192 | #if DTLS_MAX_VERSION_INTERNAL != DTLS1_2_VERSION |
407820c0 P |
193 | /* Restore digest for PHA before adding message.*/ |
194 | # error Internal DTLS version error | |
9d75dce3 | 195 | #endif |
38b051a1 TM |
196 | if (!SSL_CONNECTION_IS_DTLS(s) |
197 | && s->post_handshake_auth == SSL_PHA_EXT_SENT) { | |
9d75dce3 TS |
198 | s->post_handshake_auth = SSL_PHA_REQUESTED; |
199 | /* | |
200 | * In TLS, this is called before the message is added to the | |
201 | * digest. In DTLS, this is expected to be called after adding | |
202 | * to the digest. Either move the digest restore, or add the | |
203 | * message here after the swap, or do it after the clientFinished? | |
204 | */ | |
205 | if (!tls13_restore_handshake_digest_for_pha(s)) { | |
206 | /* SSLfatal() already called */ | |
207 | return 0; | |
208 | } | |
209 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
210 | return 1; | |
211 | } | |
212 | } | |
cc2455bf | 213 | break; |
0f1e51ea MC |
214 | } |
215 | ||
0f1e51ea | 216 | /* No valid transition found */ |
0f1e51ea MC |
217 | return 0; |
218 | } | |
219 | ||
61ae935a | 220 | /* |
8481f583 MC |
221 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed |
222 | * handshake state transitions when the client is reading messages from the | |
223 | * server. The message type that the server has sent is provided in |mt|. The | |
224 | * current state is in |s->statem.hand_state|. | |
61ae935a | 225 | * |
94ed2c67 MC |
226 | * Return values are 1 for success (transition allowed) and 0 on error |
227 | * (transition not allowed) | |
61ae935a | 228 | */ |
38b051a1 | 229 | int ossl_statem_client_read_transition(SSL_CONNECTION *s, int mt) |
61ae935a | 230 | { |
d6f1a6e9 | 231 | OSSL_STATEM *st = &s->statem; |
a455d0f6 | 232 | int ske_expected; |
61ae935a | 233 | |
0f1e51ea | 234 | /* |
3847d426 MC |
235 | * Note that after writing the first ClientHello we don't know what version |
236 | * we are going to negotiate yet, so we don't take this branch until later. | |
0f1e51ea | 237 | */ |
38b051a1 | 238 | if (SSL_CONNECTION_IS_TLS13(s)) { |
5abeaf35 MC |
239 | if (!ossl_statem_client13_read_transition(s, mt)) |
240 | goto err; | |
241 | return 1; | |
242 | } | |
0f1e51ea | 243 | |
a230b26e | 244 | switch (st->hand_state) { |
f3b3d7f0 RS |
245 | default: |
246 | break; | |
247 | ||
61ae935a MC |
248 | case TLS_ST_CW_CLNT_HELLO: |
249 | if (mt == SSL3_MT_SERVER_HELLO) { | |
250 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
251 | return 1; | |
252 | } | |
253 | ||
38b051a1 | 254 | if (SSL_CONNECTION_IS_DTLS(s)) { |
61ae935a MC |
255 | if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { |
256 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
257 | return 1; | |
258 | } | |
259 | } | |
260 | break; | |
261 | ||
d7f8783f | 262 | case TLS_ST_EARLY_DATA: |
4004ce5f MC |
263 | /* |
264 | * We've not actually selected TLSv1.3 yet, but we have sent early | |
265 | * data. The only thing allowed now is a ServerHello or a | |
266 | * HelloRetryRequest. | |
267 | */ | |
268 | if (mt == SSL3_MT_SERVER_HELLO) { | |
269 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
270 | return 1; | |
271 | } | |
4004ce5f MC |
272 | break; |
273 | ||
61ae935a MC |
274 | case TLS_ST_CR_SRVR_HELLO: |
275 | if (s->hit) { | |
aff8c126 | 276 | if (s->ext.ticket_expected) { |
61ae935a MC |
277 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
278 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
279 | return 1; | |
280 | } | |
281 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
282 | st->hand_state = TLS_ST_CR_CHANGE; | |
283 | return 1; | |
284 | } | |
285 | } else { | |
38b051a1 TM |
286 | if (SSL_CONNECTION_IS_DTLS(s) |
287 | && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
61ae935a MC |
288 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; |
289 | return 1; | |
ad3819c2 | 290 | } else if (s->version >= TLS1_VERSION |
aff8c126 RS |
291 | && s->ext.session_secret_cb != NULL |
292 | && s->session->ext.tick != NULL | |
a230b26e | 293 | && mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
ad3819c2 MC |
294 | /* |
295 | * Normally, we can tell if the server is resuming the session | |
296 | * from the session ID. EAP-FAST (RFC 4851), however, relies on | |
297 | * the next server message after the ServerHello to determine if | |
298 | * the server is resuming. | |
299 | */ | |
300 | s->hit = 1; | |
301 | st->hand_state = TLS_ST_CR_CHANGE; | |
302 | return 1; | |
555cbb32 | 303 | } else if (!(s->s3.tmp.new_cipher->algorithm_auth |
a230b26e | 304 | & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) { |
61ae935a MC |
305 | if (mt == SSL3_MT_CERTIFICATE) { |
306 | st->hand_state = TLS_ST_CR_CERT; | |
307 | return 1; | |
308 | } | |
309 | } else { | |
a455d0f6 | 310 | ske_expected = key_exchange_expected(s); |
a455d0f6 MC |
311 | /* SKE is optional for some PSK ciphersuites */ |
312 | if (ske_expected | |
555cbb32 | 313 | || ((s->s3.tmp.new_cipher->algorithm_mkey & SSL_PSK) |
a230b26e | 314 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { |
a455d0f6 MC |
315 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
316 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
317 | return 1; | |
318 | } | |
319 | } else if (mt == SSL3_MT_CERTIFICATE_REQUEST | |
a230b26e EK |
320 | && cert_req_allowed(s)) { |
321 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
322 | return 1; | |
a455d0f6 | 323 | } else if (mt == SSL3_MT_SERVER_DONE) { |
a230b26e EK |
324 | st->hand_state = TLS_ST_CR_SRVR_DONE; |
325 | return 1; | |
61ae935a MC |
326 | } |
327 | } | |
328 | } | |
329 | break; | |
330 | ||
331 | case TLS_ST_CR_CERT: | |
b67cb09f | 332 | case TLS_ST_CR_COMP_CERT: |
bb1aaab4 MC |
333 | /* |
334 | * The CertificateStatus message is optional even if | |
aff8c126 | 335 | * |ext.status_expected| is set |
bb1aaab4 | 336 | */ |
aff8c126 | 337 | if (s->ext.status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) { |
bb1aaab4 MC |
338 | st->hand_state = TLS_ST_CR_CERT_STATUS; |
339 | return 1; | |
a455d0f6 MC |
340 | } |
341 | /* Fall through */ | |
342 | ||
343 | case TLS_ST_CR_CERT_STATUS: | |
344 | ske_expected = key_exchange_expected(s); | |
a455d0f6 | 345 | /* SKE is optional for some PSK ciphersuites */ |
555cbb32 | 346 | if (ske_expected || ((s->s3.tmp.new_cipher->algorithm_mkey & SSL_PSK) |
a230b26e | 347 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { |
61ae935a MC |
348 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
349 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
350 | return 1; | |
61ae935a | 351 | } |
672f3337 | 352 | goto err; |
61ae935a | 353 | } |
a455d0f6 | 354 | /* Fall through */ |
61ae935a | 355 | |
a455d0f6 MC |
356 | case TLS_ST_CR_KEY_EXCH: |
357 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { | |
358 | if (cert_req_allowed(s)) { | |
61ae935a MC |
359 | st->hand_state = TLS_ST_CR_CERT_REQ; |
360 | return 1; | |
61ae935a | 361 | } |
672f3337 | 362 | goto err; |
61ae935a | 363 | } |
a455d0f6 | 364 | /* Fall through */ |
61ae935a MC |
365 | |
366 | case TLS_ST_CR_CERT_REQ: | |
367 | if (mt == SSL3_MT_SERVER_DONE) { | |
368 | st->hand_state = TLS_ST_CR_SRVR_DONE; | |
369 | return 1; | |
370 | } | |
371 | break; | |
372 | ||
373 | case TLS_ST_CW_FINISHED: | |
aff8c126 | 374 | if (s->ext.ticket_expected) { |
c45d6b2b DB |
375 | if (mt == SSL3_MT_NEWSESSION_TICKET) { |
376 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
377 | return 1; | |
378 | } | |
61ae935a MC |
379 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
380 | st->hand_state = TLS_ST_CR_CHANGE; | |
381 | return 1; | |
382 | } | |
383 | break; | |
384 | ||
385 | case TLS_ST_CR_SESSION_TICKET: | |
386 | if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
387 | st->hand_state = TLS_ST_CR_CHANGE; | |
388 | return 1; | |
389 | } | |
390 | break; | |
391 | ||
392 | case TLS_ST_CR_CHANGE: | |
393 | if (mt == SSL3_MT_FINISHED) { | |
394 | st->hand_state = TLS_ST_CR_FINISHED; | |
395 | return 1; | |
396 | } | |
397 | break; | |
c7f47786 MC |
398 | |
399 | case TLS_ST_OK: | |
4004ce5f | 400 | if (mt == SSL3_MT_HELLO_REQUEST) { |
c7f47786 MC |
401 | st->hand_state = TLS_ST_CR_HELLO_REQ; |
402 | return 1; | |
403 | } | |
404 | break; | |
61ae935a MC |
405 | } |
406 | ||
672f3337 | 407 | err: |
61ae935a | 408 | /* No valid transition found */ |
38b051a1 | 409 | if (SSL_CONNECTION_IS_DTLS(s) && mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
f20404fc MC |
410 | BIO *rbio; |
411 | ||
412 | /* | |
413 | * CCS messages don't have a message sequence number so this is probably | |
414 | * because of an out-of-order CCS. We'll just drop it. | |
415 | */ | |
416 | s->init_num = 0; | |
417 | s->rwstate = SSL_READING; | |
38b051a1 | 418 | rbio = SSL_get_rbio(SSL_CONNECTION_GET_SSL(s)); |
f20404fc MC |
419 | BIO_clear_retry_flags(rbio); |
420 | BIO_set_retry_read(rbio); | |
421 | return 0; | |
422 | } | |
c48ffbcc | 423 | SSLfatal(s, SSL3_AD_UNEXPECTED_MESSAGE, SSL_R_UNEXPECTED_MESSAGE); |
61ae935a MC |
424 | return 0; |
425 | } | |
426 | ||
3c95ef22 TS |
427 | static int do_compressed_cert(SSL_CONNECTION *sc) |
428 | { | |
429 | /* If we negotiated RPK, we won't try to compress it */ | |
430 | return sc->ext.client_cert_type == TLSEXT_cert_type_x509 | |
431 | && sc->ext.compress_certificate_from_peer[0] != TLSEXT_comp_cert_none; | |
432 | } | |
433 | ||
61ae935a | 434 | /* |
0f1e51ea MC |
435 | * ossl_statem_client13_write_transition() works out what handshake state to |
436 | * move to next when the TLSv1.3 client is writing messages to be sent to the | |
437 | * server. | |
0f1e51ea | 438 | */ |
38b051a1 | 439 | static WRITE_TRAN ossl_statem_client13_write_transition(SSL_CONNECTION *s) |
0f1e51ea MC |
440 | { |
441 | OSSL_STATEM *st = &s->statem; | |
442 | ||
443 | /* | |
3847d426 MC |
444 | * Note: There are no cases for TLS_ST_BEFORE because we haven't negotiated |
445 | * TLSv1.3 yet at that point. They are handled by | |
446 | * ossl_statem_client_write_transition(). | |
0f1e51ea MC |
447 | */ |
448 | switch (st->hand_state) { | |
e43e6b19 TS |
449 | default: |
450 | /* Shouldn't happen */ | |
c48ffbcc | 451 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
e43e6b19 TS |
452 | return WRITE_TRAN_ERROR; |
453 | ||
9d75dce3 TS |
454 | case TLS_ST_CR_CERT_REQ: |
455 | if (s->post_handshake_auth == SSL_PHA_REQUESTED) { | |
3c95ef22 | 456 | if (do_compressed_cert(s)) |
b67cb09f TS |
457 | st->hand_state = TLS_ST_CW_COMP_CERT; |
458 | else | |
459 | st->hand_state = TLS_ST_CW_CERT; | |
9d75dce3 TS |
460 | return WRITE_TRAN_CONTINUE; |
461 | } | |
1bf4cb0f MC |
462 | /* |
463 | * We should only get here if we received a CertificateRequest after | |
464 | * we already sent close_notify | |
465 | */ | |
466 | if (!ossl_assert((s->shutdown & SSL_SENT_SHUTDOWN) != 0)) { | |
467 | /* Shouldn't happen - same as default case */ | |
c48ffbcc | 468 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
1bf4cb0f MC |
469 | return WRITE_TRAN_ERROR; |
470 | } | |
471 | st->hand_state = TLS_ST_OK; | |
472 | return WRITE_TRAN_CONTINUE; | |
0f1e51ea | 473 | |
92760c21 | 474 | case TLS_ST_CR_FINISHED: |
ef6c191b MC |
475 | if (s->early_data_state == SSL_EARLY_DATA_WRITE_RETRY |
476 | || s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING) | |
d7f8783f | 477 | st->hand_state = TLS_ST_PENDING_EARLY_DATA_END; |
4d02f870 | 478 | else if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0 |
fc7129dc | 479 | && s->hello_retry_request == SSL_HRR_NONE) |
4d02f870 | 480 | st->hand_state = TLS_ST_CW_CHANGE; |
b67cb09f TS |
481 | else if (s->s3.tmp.cert_req == 0) |
482 | st->hand_state = TLS_ST_CW_FINISHED; | |
3c95ef22 | 483 | else if (do_compressed_cert(s)) |
b67cb09f | 484 | st->hand_state = TLS_ST_CW_COMP_CERT; |
564547e4 | 485 | else |
b67cb09f | 486 | st->hand_state = TLS_ST_CW_CERT; |
564547e4 MC |
487 | return WRITE_TRAN_CONTINUE; |
488 | ||
d7f8783f | 489 | case TLS_ST_PENDING_EARLY_DATA_END: |
ef6c191b MC |
490 | if (s->ext.early_data == SSL_EARLY_DATA_ACCEPTED) { |
491 | st->hand_state = TLS_ST_CW_END_OF_EARLY_DATA; | |
492 | return WRITE_TRAN_CONTINUE; | |
493 | } | |
494 | /* Fall through */ | |
495 | ||
496 | case TLS_ST_CW_END_OF_EARLY_DATA: | |
4d02f870 | 497 | case TLS_ST_CW_CHANGE: |
b67cb09f TS |
498 | if (s->s3.tmp.cert_req == 0) |
499 | st->hand_state = TLS_ST_CW_FINISHED; | |
3c95ef22 | 500 | else if (do_compressed_cert(s)) |
b67cb09f TS |
501 | st->hand_state = TLS_ST_CW_COMP_CERT; |
502 | else | |
503 | st->hand_state = TLS_ST_CW_CERT; | |
0f1e51ea MC |
504 | return WRITE_TRAN_CONTINUE; |
505 | ||
b67cb09f | 506 | case TLS_ST_CW_COMP_CERT: |
0f1e51ea MC |
507 | case TLS_ST_CW_CERT: |
508 | /* If a non-empty Certificate we also send CertificateVerify */ | |
555cbb32 | 509 | st->hand_state = (s->s3.tmp.cert_req == 1) ? TLS_ST_CW_CERT_VRFY |
92760c21 | 510 | : TLS_ST_CW_FINISHED; |
0f1e51ea MC |
511 | return WRITE_TRAN_CONTINUE; |
512 | ||
513 | case TLS_ST_CW_CERT_VRFY: | |
0f1e51ea MC |
514 | st->hand_state = TLS_ST_CW_FINISHED; |
515 | return WRITE_TRAN_CONTINUE; | |
516 | ||
e1c3de44 | 517 | case TLS_ST_CR_KEY_UPDATE: |
9412b3ad | 518 | case TLS_ST_CW_KEY_UPDATE: |
cc2455bf | 519 | case TLS_ST_CR_SESSION_TICKET: |
0f1e51ea | 520 | case TLS_ST_CW_FINISHED: |
94ed2c67 | 521 | st->hand_state = TLS_ST_OK; |
94ed2c67 | 522 | return WRITE_TRAN_CONTINUE; |
cc2455bf MC |
523 | |
524 | case TLS_ST_OK: | |
9412b3ad MC |
525 | if (s->key_update != SSL_KEY_UPDATE_NONE) { |
526 | st->hand_state = TLS_ST_CW_KEY_UPDATE; | |
527 | return WRITE_TRAN_CONTINUE; | |
528 | } | |
529 | ||
530 | /* Try to read from the server instead */ | |
cc2455bf | 531 | return WRITE_TRAN_FINISHED; |
0f1e51ea MC |
532 | } |
533 | } | |
534 | ||
535 | /* | |
536 | * ossl_statem_client_write_transition() works out what handshake state to | |
537 | * move to next when the client is writing messages to be sent to the server. | |
61ae935a | 538 | */ |
38b051a1 | 539 | WRITE_TRAN ossl_statem_client_write_transition(SSL_CONNECTION *s) |
61ae935a | 540 | { |
d6f1a6e9 | 541 | OSSL_STATEM *st = &s->statem; |
61ae935a | 542 | |
0f1e51ea MC |
543 | /* |
544 | * Note that immediately before/after a ClientHello we don't know what | |
545 | * version we are going to negotiate yet, so we don't take this branch until | |
546 | * later | |
547 | */ | |
38b051a1 | 548 | if (SSL_CONNECTION_IS_TLS13(s)) |
0f1e51ea MC |
549 | return ossl_statem_client13_write_transition(s); |
550 | ||
a230b26e | 551 | switch (st->hand_state) { |
f3b3d7f0 RS |
552 | default: |
553 | /* Shouldn't happen */ | |
c48ffbcc | 554 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3b3d7f0 RS |
555 | return WRITE_TRAN_ERROR; |
556 | ||
a230b26e | 557 | case TLS_ST_OK: |
c7f47786 MC |
558 | if (!s->renegotiate) { |
559 | /* | |
560 | * We haven't requested a renegotiation ourselves so we must have | |
561 | * received a message from the server. Better read it. | |
562 | */ | |
563 | return WRITE_TRAN_FINISHED; | |
564 | } | |
018fcbec BE |
565 | /* Renegotiation */ |
566 | /* fall thru */ | |
a230b26e EK |
567 | case TLS_ST_BEFORE: |
568 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
569 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 570 | |
a230b26e | 571 | case TLS_ST_CW_CLNT_HELLO: |
49e7fe12 MC |
572 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING) { |
573 | /* | |
574 | * We are assuming this is a TLSv1.3 connection, although we haven't | |
575 | * actually selected a version yet. | |
576 | */ | |
066904cc MC |
577 | if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0) |
578 | st->hand_state = TLS_ST_CW_CHANGE; | |
579 | else | |
580 | st->hand_state = TLS_ST_EARLY_DATA; | |
49e7fe12 MC |
581 | return WRITE_TRAN_CONTINUE; |
582 | } | |
a230b26e EK |
583 | /* |
584 | * No transition at the end of writing because we don't know what | |
585 | * we will be sent | |
586 | */ | |
587 | return WRITE_TRAN_FINISHED; | |
61ae935a | 588 | |
597c51bc | 589 | case TLS_ST_CR_SRVR_HELLO: |
318d3c0e MC |
590 | /* |
591 | * We only get here in TLSv1.3. We just received an HRR, so issue a | |
592 | * CCS unless middlebox compat mode is off, or we already issued one | |
593 | * because we did early data. | |
594 | */ | |
595 | if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0 | |
596 | && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING) | |
597 | st->hand_state = TLS_ST_CW_CHANGE; | |
598 | else | |
599 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
a2b97bdf MC |
600 | return WRITE_TRAN_CONTINUE; |
601 | ||
d7f8783f | 602 | case TLS_ST_EARLY_DATA: |
4004ce5f MC |
603 | return WRITE_TRAN_FINISHED; |
604 | ||
a230b26e EK |
605 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
606 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
607 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 608 | |
a230b26e | 609 | case TLS_ST_CR_SRVR_DONE: |
555cbb32 | 610 | if (s->s3.tmp.cert_req) |
a230b26e EK |
611 | st->hand_state = TLS_ST_CW_CERT; |
612 | else | |
61ae935a | 613 | st->hand_state = TLS_ST_CW_KEY_EXCH; |
a230b26e | 614 | return WRITE_TRAN_CONTINUE; |
61ae935a | 615 | |
a230b26e EK |
616 | case TLS_ST_CW_CERT: |
617 | st->hand_state = TLS_ST_CW_KEY_EXCH; | |
618 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 619 | |
a230b26e EK |
620 | case TLS_ST_CW_KEY_EXCH: |
621 | /* | |
622 | * For TLS, cert_req is set to 2, so a cert chain of nothing is | |
623 | * sent, but no verify packet is sent | |
624 | */ | |
625 | /* | |
626 | * XXX: For now, we do not support client authentication in ECDH | |
627 | * cipher suites with ECDH (rather than ECDSA) certificates. We | |
628 | * need to skip the certificate verify message when client's | |
629 | * ECDH public key is sent inside the client certificate. | |
630 | */ | |
555cbb32 | 631 | if (s->s3.tmp.cert_req == 1) { |
a230b26e EK |
632 | st->hand_state = TLS_ST_CW_CERT_VRFY; |
633 | } else { | |
61ae935a | 634 | st->hand_state = TLS_ST_CW_CHANGE; |
a230b26e | 635 | } |
555cbb32 | 636 | if (s->s3.flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { |
a230b26e EK |
637 | st->hand_state = TLS_ST_CW_CHANGE; |
638 | } | |
639 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 640 | |
a230b26e EK |
641 | case TLS_ST_CW_CERT_VRFY: |
642 | st->hand_state = TLS_ST_CW_CHANGE; | |
643 | return WRITE_TRAN_CONTINUE; | |
644 | ||
645 | case TLS_ST_CW_CHANGE: | |
318d3c0e MC |
646 | if (s->hello_retry_request == SSL_HRR_PENDING) { |
647 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
648 | } else if (s->early_data_state == SSL_EARLY_DATA_CONNECTING) { | |
066904cc MC |
649 | st->hand_state = TLS_ST_EARLY_DATA; |
650 | } else { | |
61ae935a | 651 | #if defined(OPENSSL_NO_NEXTPROTONEG) |
a230b26e | 652 | st->hand_state = TLS_ST_CW_FINISHED; |
066904cc | 653 | #else |
38b051a1 | 654 | if (!SSL_CONNECTION_IS_DTLS(s) && s->s3.npn_seen) |
066904cc MC |
655 | st->hand_state = TLS_ST_CW_NEXT_PROTO; |
656 | else | |
657 | st->hand_state = TLS_ST_CW_FINISHED; | |
61ae935a | 658 | #endif |
066904cc | 659 | } |
a230b26e | 660 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
661 | |
662 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
a230b26e EK |
663 | case TLS_ST_CW_NEXT_PROTO: |
664 | st->hand_state = TLS_ST_CW_FINISHED; | |
665 | return WRITE_TRAN_CONTINUE; | |
61ae935a MC |
666 | #endif |
667 | ||
a230b26e EK |
668 | case TLS_ST_CW_FINISHED: |
669 | if (s->hit) { | |
670 | st->hand_state = TLS_ST_OK; | |
a230b26e EK |
671 | return WRITE_TRAN_CONTINUE; |
672 | } else { | |
673 | return WRITE_TRAN_FINISHED; | |
674 | } | |
61ae935a | 675 | |
a230b26e EK |
676 | case TLS_ST_CR_FINISHED: |
677 | if (s->hit) { | |
678 | st->hand_state = TLS_ST_CW_CHANGE; | |
679 | return WRITE_TRAN_CONTINUE; | |
680 | } else { | |
681 | st->hand_state = TLS_ST_OK; | |
a230b26e EK |
682 | return WRITE_TRAN_CONTINUE; |
683 | } | |
c7f47786 MC |
684 | |
685 | case TLS_ST_CR_HELLO_REQ: | |
686 | /* | |
687 | * If we can renegotiate now then do so, otherwise wait for a more | |
688 | * convenient time. | |
689 | */ | |
38b051a1 | 690 | if (ssl3_renegotiate_check(SSL_CONNECTION_GET_SSL(s), 1)) { |
c7f47786 | 691 | if (!tls_setup_handshake(s)) { |
f63a17d6 | 692 | /* SSLfatal() already called */ |
c7f47786 MC |
693 | return WRITE_TRAN_ERROR; |
694 | } | |
695 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
696 | return WRITE_TRAN_CONTINUE; | |
697 | } | |
698 | st->hand_state = TLS_ST_OK; | |
c7f47786 | 699 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
700 | } |
701 | } | |
702 | ||
703 | /* | |
704 | * Perform any pre work that needs to be done prior to sending a message from | |
705 | * the client to the server. | |
706 | */ | |
38b051a1 | 707 | WORK_STATE ossl_statem_client_pre_work(SSL_CONNECTION *s, WORK_STATE wst) |
61ae935a | 708 | { |
d6f1a6e9 | 709 | OSSL_STATEM *st = &s->statem; |
61ae935a | 710 | |
a230b26e | 711 | switch (st->hand_state) { |
f3b3d7f0 RS |
712 | default: |
713 | /* No pre work to be done */ | |
714 | break; | |
715 | ||
61ae935a MC |
716 | case TLS_ST_CW_CLNT_HELLO: |
717 | s->shutdown = 0; | |
38b051a1 | 718 | if (SSL_CONNECTION_IS_DTLS(s)) { |
61ae935a | 719 | /* every DTLS ClientHello resets Finished MAC */ |
2c4a056f | 720 | if (!ssl3_init_finished_mac(s)) { |
f63a17d6 | 721 | /* SSLfatal() already called */ |
2c4a056f MC |
722 | return WORK_ERROR; |
723 | } | |
2c50d7fb MC |
724 | } else if (s->ext.early_data == SSL_EARLY_DATA_REJECTED) { |
725 | /* | |
726 | * This must be a second ClientHello after an HRR following an | |
727 | * earlier rejected attempt to send early data. Since we were | |
728 | * previously encrypting the early data we now need to reset the | |
729 | * write record layer in order to write in plaintext again. | |
730 | */ | |
731 | if (!ssl_set_new_record_layer(s, | |
732 | TLS_ANY_VERSION, | |
733 | OSSL_RECORD_DIRECTION_WRITE, | |
734 | OSSL_RECORD_PROTECTION_LEVEL_NONE, | |
3f9175c7 MC |
735 | NULL, 0, NULL, 0, NULL, 0, NULL, 0, |
736 | NULL, 0, NID_undef, NULL, NULL, | |
737 | NULL)) { | |
2c50d7fb MC |
738 | /* SSLfatal already called */ |
739 | return WORK_ERROR; | |
740 | } | |
61ae935a MC |
741 | } |
742 | break; | |
743 | ||
61ae935a | 744 | case TLS_ST_CW_CHANGE: |
38b051a1 | 745 | if (SSL_CONNECTION_IS_DTLS(s)) { |
61ae935a MC |
746 | if (s->hit) { |
747 | /* | |
748 | * We're into the last flight so we don't retransmit these | |
749 | * messages unless we need to. | |
750 | */ | |
751 | st->use_timer = 0; | |
752 | } | |
753 | #ifndef OPENSSL_NO_SCTP | |
38b051a1 | 754 | if (BIO_dgram_is_sctp(SSL_get_wbio(SSL_CONNECTION_GET_SSL(s)))) { |
a2c2e000 | 755 | /* Calls SSLfatal() as required */ |
61ae935a | 756 | return dtls_wait_for_dry(s); |
a2c2e000 | 757 | } |
61ae935a MC |
758 | #endif |
759 | } | |
f3b3d7f0 | 760 | break; |
61ae935a | 761 | |
d7f8783f | 762 | case TLS_ST_PENDING_EARLY_DATA_END: |
ef6c191b MC |
763 | /* |
764 | * If we've been called by SSL_do_handshake()/SSL_write(), or we did not | |
765 | * attempt to write early data before calling SSL_read() then we press | |
766 | * on with the handshake. Otherwise we pause here. | |
767 | */ | |
768 | if (s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING | |
769 | || s->early_data_state == SSL_EARLY_DATA_NONE) | |
770 | return WORK_FINISHED_CONTINUE; | |
771 | /* Fall through */ | |
772 | ||
773 | case TLS_ST_EARLY_DATA: | |
2a8db717 MC |
774 | return tls_finish_handshake(s, wst, 0, 1); |
775 | ||
61ae935a | 776 | case TLS_ST_OK: |
a2c2e000 | 777 | /* Calls SSLfatal() as required */ |
2a8db717 | 778 | return tls_finish_handshake(s, wst, 1, 1); |
61ae935a MC |
779 | } |
780 | ||
781 | return WORK_FINISHED_CONTINUE; | |
782 | } | |
783 | ||
784 | /* | |
785 | * Perform any work that needs to be done after sending a message from the | |
786 | * client to the server. | |
787 | */ | |
38b051a1 | 788 | WORK_STATE ossl_statem_client_post_work(SSL_CONNECTION *s, WORK_STATE wst) |
61ae935a | 789 | { |
d6f1a6e9 | 790 | OSSL_STATEM *st = &s->statem; |
38b051a1 | 791 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
61ae935a MC |
792 | |
793 | s->init_num = 0; | |
794 | ||
a230b26e | 795 | switch (st->hand_state) { |
f3b3d7f0 RS |
796 | default: |
797 | /* No post work to be done */ | |
798 | break; | |
799 | ||
61ae935a | 800 | case TLS_ST_CW_CLNT_HELLO: |
6cb42265 | 801 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING |
5cc807da | 802 | && s->max_early_data > 0) { |
6cb42265 MC |
803 | /* |
804 | * We haven't selected TLSv1.3 yet so we don't call the change | |
805 | * cipher state function associated with the SSL_METHOD. Instead | |
806 | * we call tls13_change_cipher_state() directly. | |
807 | */ | |
5cc807da | 808 | if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) == 0) { |
5cc807da MC |
809 | if (!tls13_change_cipher_state(s, |
810 | SSL3_CC_EARLY | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { | |
811 | /* SSLfatal() already called */ | |
812 | return WORK_ERROR; | |
813 | } | |
a2c2e000 | 814 | } |
5cc807da MC |
815 | /* else we're in compat mode so we delay flushing until after CCS */ |
816 | } else if (!statem_flush(s)) { | |
817 | return WORK_MORE_A; | |
818 | } | |
819 | ||
38b051a1 | 820 | if (SSL_CONNECTION_IS_DTLS(s)) { |
5cc807da MC |
821 | /* Treat the next message as the first packet */ |
822 | s->first_packet = 1; | |
6cb42265 | 823 | } |
61ae935a MC |
824 | break; |
825 | ||
826 | case TLS_ST_CW_KEY_EXCH: | |
a2c2e000 MC |
827 | if (tls_client_key_exchange_post_work(s) == 0) { |
828 | /* SSLfatal() already called */ | |
61ae935a | 829 | return WORK_ERROR; |
a2c2e000 | 830 | } |
61ae935a MC |
831 | break; |
832 | ||
833 | case TLS_ST_CW_CHANGE: | |
38b051a1 TM |
834 | if (SSL_CONNECTION_IS_TLS13(s) |
835 | || s->hello_retry_request == SSL_HRR_PENDING) | |
4d02f870 | 836 | break; |
066904cc MC |
837 | if (s->early_data_state == SSL_EARLY_DATA_CONNECTING |
838 | && s->max_early_data > 0) { | |
839 | /* | |
840 | * We haven't selected TLSv1.3 yet so we don't call the change | |
841 | * cipher state function associated with the SSL_METHOD. Instead | |
842 | * we call tls13_change_cipher_state() directly. | |
843 | */ | |
844 | if (!tls13_change_cipher_state(s, | |
845 | SSL3_CC_EARLY | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
846 | return WORK_ERROR; | |
847 | break; | |
848 | } | |
555cbb32 | 849 | s->session->cipher = s->s3.tmp.new_cipher; |
61ae935a MC |
850 | #ifdef OPENSSL_NO_COMP |
851 | s->session->compress_meth = 0; | |
852 | #else | |
555cbb32 | 853 | if (s->s3.tmp.new_compression == NULL) |
61ae935a MC |
854 | s->session->compress_meth = 0; |
855 | else | |
555cbb32 | 856 | s->session->compress_meth = s->s3.tmp.new_compression->id; |
61ae935a | 857 | #endif |
38b051a1 | 858 | if (!ssl->method->ssl3_enc->setup_key_block(s)) { |
a2c2e000 | 859 | /* SSLfatal() already called */ |
61ae935a | 860 | return WORK_ERROR; |
a2c2e000 | 861 | } |
61ae935a | 862 | |
38b051a1 | 863 | if (!ssl->method->ssl3_enc->change_cipher_state(s, |
a2c2e000 MC |
864 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { |
865 | /* SSLfatal() already called */ | |
61ae935a | 866 | return WORK_ERROR; |
a2c2e000 | 867 | } |
61ae935a | 868 | |
38b051a1 | 869 | if (SSL_CONNECTION_IS_DTLS(s)) { |
61ae935a MC |
870 | #ifndef OPENSSL_NO_SCTP |
871 | if (s->hit) { | |
872 | /* | |
873 | * Change to new shared key of SCTP-Auth, will be ignored if | |
874 | * no SCTP used. | |
875 | */ | |
38b051a1 | 876 | BIO_ctrl(SSL_get_wbio(ssl), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, |
61ae935a MC |
877 | 0, NULL); |
878 | } | |
879 | #endif | |
880 | ||
b92fc4ae | 881 | dtls1_increment_epoch(s, SSL3_CC_WRITE); |
61ae935a MC |
882 | } |
883 | break; | |
884 | ||
885 | case TLS_ST_CW_FINISHED: | |
886 | #ifndef OPENSSL_NO_SCTP | |
38b051a1 | 887 | if (wst == WORK_MORE_A && SSL_CONNECTION_IS_DTLS(s) && s->hit == 0) { |
61ae935a MC |
888 | /* |
889 | * Change to new shared key of SCTP-Auth, will be ignored if | |
890 | * no SCTP used. | |
891 | */ | |
38b051a1 | 892 | BIO_ctrl(SSL_get_wbio(ssl), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, |
61ae935a MC |
893 | 0, NULL); |
894 | } | |
895 | #endif | |
896 | if (statem_flush(s) != 1) | |
897 | return WORK_MORE_B; | |
92760c21 | 898 | |
38b051a1 | 899 | if (SSL_CONNECTION_IS_TLS13(s)) { |
9d75dce3 | 900 | if (!tls13_save_handshake_digest_for_pha(s)) { |
a2c2e000 MC |
901 | /* SSLfatal() already called */ |
902 | return WORK_ERROR; | |
903 | } | |
9d75dce3 | 904 | if (s->post_handshake_auth != SSL_PHA_REQUESTED) { |
38b051a1 | 905 | if (!ssl->method->ssl3_enc->change_cipher_state(s, |
9d75dce3 TS |
906 | SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { |
907 | /* SSLfatal() already called */ | |
908 | return WORK_ERROR; | |
909 | } | |
910 | } | |
92760c21 | 911 | } |
61ae935a | 912 | break; |
9412b3ad MC |
913 | |
914 | case TLS_ST_CW_KEY_UPDATE: | |
915 | if (statem_flush(s) != 1) | |
916 | return WORK_MORE_A; | |
a2c2e000 MC |
917 | if (!tls13_update_key(s, 1)) { |
918 | /* SSLfatal() already called */ | |
57389a32 | 919 | return WORK_ERROR; |
a2c2e000 | 920 | } |
9412b3ad | 921 | break; |
61ae935a MC |
922 | } |
923 | ||
924 | return WORK_FINISHED_CONTINUE; | |
925 | } | |
926 | ||
927 | /* | |
6392fb8e MC |
928 | * Get the message construction function and message type for sending from the |
929 | * client | |
61ae935a MC |
930 | * |
931 | * Valid return values are: | |
932 | * 1: Success | |
933 | * 0: Error | |
934 | */ | |
38b051a1 | 935 | int ossl_statem_client_construct_message(SSL_CONNECTION *s, |
a15c953f | 936 | confunc_f *confunc, int *mt) |
61ae935a | 937 | { |
d6f1a6e9 | 938 | OSSL_STATEM *st = &s->statem; |
61ae935a | 939 | |
4a01c59f MC |
940 | switch (st->hand_state) { |
941 | default: | |
942 | /* Shouldn't happen */ | |
c48ffbcc | 943 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_HANDSHAKE_STATE); |
4a01c59f MC |
944 | return 0; |
945 | ||
946 | case TLS_ST_CW_CHANGE: | |
38b051a1 | 947 | if (SSL_CONNECTION_IS_DTLS(s)) |
6392fb8e | 948 | *confunc = dtls_construct_change_cipher_spec; |
4a01c59f | 949 | else |
6392fb8e MC |
950 | *confunc = tls_construct_change_cipher_spec; |
951 | *mt = SSL3_MT_CHANGE_CIPHER_SPEC; | |
4a01c59f MC |
952 | break; |
953 | ||
954 | case TLS_ST_CW_CLNT_HELLO: | |
6392fb8e MC |
955 | *confunc = tls_construct_client_hello; |
956 | *mt = SSL3_MT_CLIENT_HELLO; | |
4a01c59f MC |
957 | break; |
958 | ||
ef6c191b MC |
959 | case TLS_ST_CW_END_OF_EARLY_DATA: |
960 | *confunc = tls_construct_end_of_early_data; | |
961 | *mt = SSL3_MT_END_OF_EARLY_DATA; | |
962 | break; | |
963 | ||
964 | case TLS_ST_PENDING_EARLY_DATA_END: | |
965 | *confunc = NULL; | |
966 | *mt = SSL3_MT_DUMMY; | |
967 | break; | |
968 | ||
4a01c59f | 969 | case TLS_ST_CW_CERT: |
6392fb8e MC |
970 | *confunc = tls_construct_client_certificate; |
971 | *mt = SSL3_MT_CERTIFICATE; | |
4a01c59f MC |
972 | break; |
973 | ||
b67cb09f TS |
974 | #ifndef OPENSSL_NO_COMP_ALG |
975 | case TLS_ST_CW_COMP_CERT: | |
976 | *confunc = tls_construct_client_compressed_certificate; | |
977 | *mt = SSL3_MT_COMPRESSED_CERTIFICATE; | |
978 | break; | |
979 | #endif | |
980 | ||
4a01c59f | 981 | case TLS_ST_CW_KEY_EXCH: |
6392fb8e MC |
982 | *confunc = tls_construct_client_key_exchange; |
983 | *mt = SSL3_MT_CLIENT_KEY_EXCHANGE; | |
4a01c59f MC |
984 | break; |
985 | ||
986 | case TLS_ST_CW_CERT_VRFY: | |
d8bc1399 | 987 | *confunc = tls_construct_cert_verify; |
6392fb8e | 988 | *mt = SSL3_MT_CERTIFICATE_VERIFY; |
4a01c59f | 989 | break; |
61ae935a MC |
990 | |
991 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
4a01c59f | 992 | case TLS_ST_CW_NEXT_PROTO: |
6392fb8e MC |
993 | *confunc = tls_construct_next_proto; |
994 | *mt = SSL3_MT_NEXT_PROTO; | |
4a01c59f | 995 | break; |
61ae935a | 996 | #endif |
4a01c59f | 997 | case TLS_ST_CW_FINISHED: |
6392fb8e MC |
998 | *confunc = tls_construct_finished; |
999 | *mt = SSL3_MT_FINISHED; | |
4a01c59f | 1000 | break; |
9412b3ad MC |
1001 | |
1002 | case TLS_ST_CW_KEY_UPDATE: | |
1003 | *confunc = tls_construct_key_update; | |
1004 | *mt = SSL3_MT_KEY_UPDATE; | |
1005 | break; | |
4a01c59f | 1006 | } |
5923ad4b | 1007 | |
5923ad4b | 1008 | return 1; |
61ae935a MC |
1009 | } |
1010 | ||
1011 | /* | |
1012 | * Returns the maximum allowed length for the current message that we are | |
1013 | * reading. Excludes the message header. | |
1014 | */ | |
38b051a1 | 1015 | size_t ossl_statem_client_max_message_size(SSL_CONNECTION *s) |
61ae935a | 1016 | { |
d6f1a6e9 | 1017 | OSSL_STATEM *st = &s->statem; |
61ae935a | 1018 | |
a230b26e | 1019 | switch (st->hand_state) { |
f3b3d7f0 RS |
1020 | default: |
1021 | /* Shouldn't happen */ | |
1022 | return 0; | |
1023 | ||
a230b26e EK |
1024 | case TLS_ST_CR_SRVR_HELLO: |
1025 | return SERVER_HELLO_MAX_LENGTH; | |
61ae935a | 1026 | |
a230b26e EK |
1027 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
1028 | return HELLO_VERIFY_REQUEST_MAX_LENGTH; | |
61ae935a | 1029 | |
b67cb09f | 1030 | case TLS_ST_CR_COMP_CERT: |
a230b26e EK |
1031 | case TLS_ST_CR_CERT: |
1032 | return s->max_cert_list; | |
61ae935a | 1033 | |
2c5dfdc3 | 1034 | case TLS_ST_CR_CERT_VRFY: |
c6d14bfd | 1035 | return CERTIFICATE_VERIFY_MAX_LENGTH; |
2c5dfdc3 | 1036 | |
a230b26e EK |
1037 | case TLS_ST_CR_CERT_STATUS: |
1038 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
61ae935a | 1039 | |
a230b26e EK |
1040 | case TLS_ST_CR_KEY_EXCH: |
1041 | return SERVER_KEY_EXCH_MAX_LENGTH; | |
61ae935a | 1042 | |
a230b26e EK |
1043 | case TLS_ST_CR_CERT_REQ: |
1044 | /* | |
1045 | * Set to s->max_cert_list for compatibility with previous releases. In | |
1046 | * practice these messages can get quite long if servers are configured | |
1047 | * to provide a long list of acceptable CAs | |
1048 | */ | |
1049 | return s->max_cert_list; | |
61ae935a | 1050 | |
a230b26e EK |
1051 | case TLS_ST_CR_SRVR_DONE: |
1052 | return SERVER_HELLO_DONE_MAX_LENGTH; | |
61ae935a | 1053 | |
a230b26e EK |
1054 | case TLS_ST_CR_CHANGE: |
1055 | if (s->version == DTLS1_BAD_VER) | |
1056 | return 3; | |
1057 | return CCS_MAX_LENGTH; | |
61ae935a | 1058 | |
a230b26e | 1059 | case TLS_ST_CR_SESSION_TICKET: |
38b051a1 TM |
1060 | return (SSL_CONNECTION_IS_TLS13(s)) ? SESSION_TICKET_MAX_LENGTH_TLS13 |
1061 | : SESSION_TICKET_MAX_LENGTH_TLS12; | |
61ae935a | 1062 | |
a230b26e EK |
1063 | case TLS_ST_CR_FINISHED: |
1064 | return FINISHED_MAX_LENGTH; | |
e46f2334 MC |
1065 | |
1066 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: | |
1067 | return ENCRYPTED_EXTENSIONS_MAX_LENGTH; | |
e1c3de44 MC |
1068 | |
1069 | case TLS_ST_CR_KEY_UPDATE: | |
1070 | return KEY_UPDATE_MAX_LENGTH; | |
61ae935a | 1071 | } |
61ae935a MC |
1072 | } |
1073 | ||
1074 | /* | |
0c3eb279 | 1075 | * Process a message that the client has received from the server. |
61ae935a | 1076 | */ |
38b051a1 TM |
1077 | MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL_CONNECTION *s, |
1078 | PACKET *pkt) | |
61ae935a | 1079 | { |
d6f1a6e9 | 1080 | OSSL_STATEM *st = &s->statem; |
61ae935a | 1081 | |
a230b26e | 1082 | switch (st->hand_state) { |
f3b3d7f0 RS |
1083 | default: |
1084 | /* Shouldn't happen */ | |
c48ffbcc | 1085 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3b3d7f0 RS |
1086 | return MSG_PROCESS_ERROR; |
1087 | ||
a230b26e EK |
1088 | case TLS_ST_CR_SRVR_HELLO: |
1089 | return tls_process_server_hello(s, pkt); | |
61ae935a | 1090 | |
a230b26e EK |
1091 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: |
1092 | return dtls_process_hello_verify(s, pkt); | |
61ae935a | 1093 | |
a230b26e EK |
1094 | case TLS_ST_CR_CERT: |
1095 | return tls_process_server_certificate(s, pkt); | |
61ae935a | 1096 | |
b67cb09f TS |
1097 | #ifndef OPENSSL_NO_COMP_ALG |
1098 | case TLS_ST_CR_COMP_CERT: | |
1099 | return tls_process_server_compressed_certificate(s, pkt); | |
1100 | #endif | |
1101 | ||
2c5dfdc3 MC |
1102 | case TLS_ST_CR_CERT_VRFY: |
1103 | return tls_process_cert_verify(s, pkt); | |
1104 | ||
a230b26e EK |
1105 | case TLS_ST_CR_CERT_STATUS: |
1106 | return tls_process_cert_status(s, pkt); | |
61ae935a | 1107 | |
a230b26e EK |
1108 | case TLS_ST_CR_KEY_EXCH: |
1109 | return tls_process_key_exchange(s, pkt); | |
61ae935a | 1110 | |
a230b26e EK |
1111 | case TLS_ST_CR_CERT_REQ: |
1112 | return tls_process_certificate_request(s, pkt); | |
61ae935a | 1113 | |
a230b26e EK |
1114 | case TLS_ST_CR_SRVR_DONE: |
1115 | return tls_process_server_done(s, pkt); | |
61ae935a | 1116 | |
a230b26e EK |
1117 | case TLS_ST_CR_CHANGE: |
1118 | return tls_process_change_cipher_spec(s, pkt); | |
61ae935a | 1119 | |
a230b26e EK |
1120 | case TLS_ST_CR_SESSION_TICKET: |
1121 | return tls_process_new_session_ticket(s, pkt); | |
61ae935a | 1122 | |
a230b26e EK |
1123 | case TLS_ST_CR_FINISHED: |
1124 | return tls_process_finished(s, pkt); | |
e46f2334 | 1125 | |
c7f47786 MC |
1126 | case TLS_ST_CR_HELLO_REQ: |
1127 | return tls_process_hello_req(s, pkt); | |
1128 | ||
e46f2334 MC |
1129 | case TLS_ST_CR_ENCRYPTED_EXTENSIONS: |
1130 | return tls_process_encrypted_extensions(s, pkt); | |
e1c3de44 MC |
1131 | |
1132 | case TLS_ST_CR_KEY_UPDATE: | |
1133 | return tls_process_key_update(s, pkt); | |
61ae935a | 1134 | } |
61ae935a MC |
1135 | } |
1136 | ||
1137 | /* | |
1138 | * Perform any further processing required following the receipt of a message | |
1139 | * from the server | |
1140 | */ | |
38b051a1 TM |
1141 | WORK_STATE ossl_statem_client_post_process_message(SSL_CONNECTION *s, |
1142 | WORK_STATE wst) | |
61ae935a | 1143 | { |
d6f1a6e9 | 1144 | OSSL_STATEM *st = &s->statem; |
61ae935a | 1145 | |
a230b26e | 1146 | switch (st->hand_state) { |
f3b3d7f0 RS |
1147 | default: |
1148 | /* Shouldn't happen */ | |
c48ffbcc | 1149 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3b3d7f0 RS |
1150 | return WORK_ERROR; |
1151 | ||
0c3eb279 | 1152 | case TLS_ST_CR_CERT: |
b67cb09f | 1153 | case TLS_ST_CR_COMP_CERT: |
0c3eb279 DDO |
1154 | return tls_post_process_server_certificate(s, wst); |
1155 | ||
e4562014 | 1156 | case TLS_ST_CR_CERT_VRFY: |
05c4f1d5 MC |
1157 | case TLS_ST_CR_CERT_REQ: |
1158 | return tls_prepare_client_certificate(s, wst); | |
61ae935a | 1159 | } |
61ae935a MC |
1160 | } |
1161 | ||
67ec6d2b | 1162 | CON_FUNC_RETURN tls_construct_client_hello(SSL_CONNECTION *s, WPACKET *pkt) |
0f113f3e | 1163 | { |
2c7b4dbc | 1164 | unsigned char *p; |
ec60ccc1 MC |
1165 | size_t sess_id_len; |
1166 | int i, protverr; | |
09b6c2ef | 1167 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
1168 | SSL_COMP *comp; |
1169 | #endif | |
b9908bf9 | 1170 | SSL_SESSION *sess = s->session; |
a5816a5a | 1171 | unsigned char *session_id; |
38b051a1 | 1172 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
0f113f3e | 1173 | |
b9908bf9 | 1174 | /* Work out what SSL/TLS/DTLS version to use */ |
4fa52141 VD |
1175 | protverr = ssl_set_client_hello_version(s); |
1176 | if (protverr != 0) { | |
c48ffbcc | 1177 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, protverr); |
67ec6d2b | 1178 | return CON_FUNC_ERROR; |
4fa52141 | 1179 | } |
0f113f3e | 1180 | |
e586eac8 | 1181 | if (sess == NULL |
4fd12788 | 1182 | || !ssl_version_supported(s, sess->ssl_version, NULL) |
e586eac8 | 1183 | || !SSL_SESSION_is_resumable(sess)) { |
fc7129dc MC |
1184 | if (s->hello_retry_request == SSL_HRR_NONE |
1185 | && !ssl_get_new_session(s, 0)) { | |
f63a17d6 | 1186 | /* SSLfatal() already called */ |
67ec6d2b | 1187 | return CON_FUNC_ERROR; |
f63a17d6 | 1188 | } |
b9908bf9 MC |
1189 | } |
1190 | /* else use the pre-loaded session */ | |
0f113f3e | 1191 | |
555cbb32 | 1192 | p = s->s3.client_random; |
0f113f3e | 1193 | |
b9908bf9 MC |
1194 | /* |
1195 | * for DTLS if client_random is initialized, reuse it, we are | |
1196 | * required to use same upon reply to HelloVerify | |
1197 | */ | |
38b051a1 | 1198 | if (SSL_CONNECTION_IS_DTLS(s)) { |
b9908bf9 MC |
1199 | size_t idx; |
1200 | i = 1; | |
555cbb32 | 1201 | for (idx = 0; idx < sizeof(s->s3.client_random); idx++) { |
b9908bf9 MC |
1202 | if (p[idx]) { |
1203 | i = 0; | |
1204 | break; | |
0f113f3e | 1205 | } |
0f113f3e | 1206 | } |
751b26b1 | 1207 | } else { |
fc7129dc | 1208 | i = (s->hello_retry_request == SSL_HRR_NONE); |
751b26b1 | 1209 | } |
0f113f3e | 1210 | |
555cbb32 | 1211 | if (i && ssl_fill_hello_random(s, 0, p, sizeof(s->s3.client_random), |
f63a17d6 | 1212 | DOWNGRADE_NONE) <= 0) { |
c48ffbcc | 1213 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1214 | return CON_FUNC_ERROR; |
f63a17d6 | 1215 | } |
b9908bf9 | 1216 | |
b9908bf9 MC |
1217 | /*- |
1218 | * version indicates the negotiated version: for example from | |
1219 | * an SSLv2/v3 compatible client hello). The client_version | |
1220 | * field is the maximum version we permit and it is also | |
1221 | * used in RSA encrypted premaster secrets. Some servers can | |
1222 | * choke if we initially report a higher version then | |
1223 | * renegotiate to a lower one in the premaster secret. This | |
1224 | * didn't happen with TLS 1.0 as most servers supported it | |
1225 | * but it can with TLS 1.1 or later if the server only supports | |
1226 | * 1.0. | |
1227 | * | |
1228 | * Possible scenario with previous logic: | |
1229 | * 1. Client hello indicates TLS 1.2 | |
1230 | * 2. Server hello says TLS 1.0 | |
1231 | * 3. RSA encrypted premaster secret uses 1.2. | |
8483a003 | 1232 | * 4. Handshake proceeds using TLS 1.0. |
b9908bf9 MC |
1233 | * 5. Server sends hello request to renegotiate. |
1234 | * 6. Client hello indicates TLS v1.0 as we now | |
1235 | * know that is maximum server supports. | |
1236 | * 7. Server chokes on RSA encrypted premaster secret | |
1237 | * containing version 1.0. | |
1238 | * | |
1239 | * For interoperability it should be OK to always use the | |
1240 | * maximum version we support in client hello and then rely | |
1241 | * on the checking of version to ensure the servers isn't | |
1242 | * being inconsistent: for example initially negotiating with | |
1243 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
1244 | * client_version in client hello and not resetting it to | |
1245 | * the negotiated version. | |
cd998837 MC |
1246 | * |
1247 | * For TLS 1.3 we always set the ClientHello version to 1.2 and rely on the | |
16bce0e0 | 1248 | * supported_versions extension for the real supported versions. |
b9908bf9 | 1249 | */ |
7acb8b64 | 1250 | if (!WPACKET_put_bytes_u16(pkt, s->client_version) |
555cbb32 | 1251 | || !WPACKET_memcpy(pkt, s->s3.client_random, SSL3_RANDOM_SIZE)) { |
c48ffbcc | 1252 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1253 | return CON_FUNC_ERROR; |
2c7b4dbc | 1254 | } |
b9908bf9 MC |
1255 | |
1256 | /* Session ID */ | |
a5816a5a MC |
1257 | session_id = s->session->session_id; |
1258 | if (s->new_session || s->session->ssl_version == TLS1_3_VERSION) { | |
1259 | if (s->version == TLS1_3_VERSION | |
1260 | && (s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0) { | |
1261 | sess_id_len = sizeof(s->tmp_session_id); | |
1262 | s->tmp_session_id_len = sess_id_len; | |
1263 | session_id = s->tmp_session_id; | |
fc7129dc | 1264 | if (s->hello_retry_request == SSL_HRR_NONE |
38b051a1 | 1265 | && RAND_bytes_ex(sctx->libctx, s->tmp_session_id, |
0f8815aa | 1266 | sess_id_len, 0) <= 0) { |
c48ffbcc | 1267 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1268 | return CON_FUNC_ERROR; |
a5816a5a MC |
1269 | } |
1270 | } else { | |
1271 | sess_id_len = 0; | |
1272 | } | |
1273 | } else { | |
dee0cc10 | 1274 | assert(s->session->session_id_length <= sizeof(s->session->session_id)); |
ec60ccc1 | 1275 | sess_id_len = s->session->session_id_length; |
a5816a5a MC |
1276 | if (s->version == TLS1_3_VERSION) { |
1277 | s->tmp_session_id_len = sess_id_len; | |
1278 | memcpy(s->tmp_session_id, s->session->session_id, sess_id_len); | |
1279 | } | |
1280 | } | |
dee0cc10 | 1281 | if (!WPACKET_start_sub_packet_u8(pkt) |
a5816a5a | 1282 | || (sess_id_len != 0 && !WPACKET_memcpy(pkt, session_id, |
ec60ccc1 | 1283 | sess_id_len)) |
7cea05dc | 1284 | || !WPACKET_close(pkt)) { |
c48ffbcc | 1285 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1286 | return CON_FUNC_ERROR; |
b9908bf9 | 1287 | } |
0f113f3e | 1288 | |
b9908bf9 | 1289 | /* cookie stuff for DTLS */ |
38b051a1 | 1290 | if (SSL_CONNECTION_IS_DTLS(s)) { |
2c7b4dbc | 1291 | if (s->d1->cookie_len > sizeof(s->d1->cookie) |
7cea05dc | 1292 | || !WPACKET_sub_memcpy_u8(pkt, s->d1->cookie, |
b2b3024e | 1293 | s->d1->cookie_len)) { |
c48ffbcc | 1294 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1295 | return CON_FUNC_ERROR; |
0f113f3e | 1296 | } |
b9908bf9 MC |
1297 | } |
1298 | ||
1299 | /* Ciphers supported */ | |
7cea05dc | 1300 | if (!WPACKET_start_sub_packet_u16(pkt)) { |
c48ffbcc | 1301 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1302 | return CON_FUNC_ERROR; |
2c7b4dbc | 1303 | } |
635c8f77 | 1304 | |
38b051a1 TM |
1305 | if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(SSL_CONNECTION_GET_SSL(s)), |
1306 | pkt)) { | |
f63a17d6 | 1307 | /* SSLfatal() already called */ |
67ec6d2b | 1308 | return CON_FUNC_ERROR; |
f63a17d6 | 1309 | } |
7cea05dc | 1310 | if (!WPACKET_close(pkt)) { |
c48ffbcc | 1311 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1312 | return CON_FUNC_ERROR; |
b9908bf9 | 1313 | } |
0f113f3e | 1314 | |
b9908bf9 | 1315 | /* COMPRESSION */ |
7cea05dc | 1316 | if (!WPACKET_start_sub_packet_u8(pkt)) { |
c48ffbcc | 1317 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1318 | return CON_FUNC_ERROR; |
2c7b4dbc MC |
1319 | } |
1320 | #ifndef OPENSSL_NO_COMP | |
c19602b5 | 1321 | if (ssl_allow_compression(s) |
38b051a1 TM |
1322 | && sctx->comp_methods |
1323 | && (SSL_CONNECTION_IS_DTLS(s) | |
1324 | || s->s3.tmp.max_ver < TLS1_3_VERSION)) { | |
1325 | int compnum = sk_SSL_COMP_num(sctx->comp_methods); | |
2c7b4dbc | 1326 | for (i = 0; i < compnum; i++) { |
38b051a1 | 1327 | comp = sk_SSL_COMP_value(sctx->comp_methods, i); |
7cea05dc | 1328 | if (!WPACKET_put_bytes_u8(pkt, comp->id)) { |
c48ffbcc | 1329 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1330 | return CON_FUNC_ERROR; |
2c7b4dbc MC |
1331 | } |
1332 | } | |
b9908bf9 | 1333 | } |
09b6c2ef | 1334 | #endif |
2c7b4dbc | 1335 | /* Add the NULL method */ |
7cea05dc | 1336 | if (!WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_close(pkt)) { |
c48ffbcc | 1337 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 1338 | return CON_FUNC_ERROR; |
2c7b4dbc | 1339 | } |
761772d7 | 1340 | |
b9908bf9 | 1341 | /* TLS extensions */ |
f63a17d6 MC |
1342 | if (!tls_construct_extensions(s, pkt, SSL_EXT_CLIENT_HELLO, NULL, 0)) { |
1343 | /* SSLfatal() already called */ | |
67ec6d2b | 1344 | return CON_FUNC_ERROR; |
b9908bf9 | 1345 | } |
0f113f3e | 1346 | |
67ec6d2b | 1347 | return CON_FUNC_SUCCESS; |
0f113f3e | 1348 | } |
d02b48c6 | 1349 | |
38b051a1 | 1350 | MSG_PROCESS_RETURN dtls_process_hello_verify(SSL_CONNECTION *s, PACKET *pkt) |
8ba708e5 | 1351 | { |
cb150cbc | 1352 | size_t cookie_len; |
8ba708e5 MC |
1353 | PACKET cookiepkt; |
1354 | ||
1355 | if (!PACKET_forward(pkt, 2) | |
a230b26e | 1356 | || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) { |
c48ffbcc | 1357 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 1358 | return MSG_PROCESS_ERROR; |
8ba708e5 MC |
1359 | } |
1360 | ||
1361 | cookie_len = PACKET_remaining(&cookiepkt); | |
1362 | if (cookie_len > sizeof(s->d1->cookie)) { | |
c48ffbcc | 1363 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_LENGTH_TOO_LONG); |
f63a17d6 | 1364 | return MSG_PROCESS_ERROR; |
8ba708e5 MC |
1365 | } |
1366 | ||
1367 | if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) { | |
c48ffbcc | 1368 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 1369 | return MSG_PROCESS_ERROR; |
8ba708e5 MC |
1370 | } |
1371 | s->d1->cookie_len = cookie_len; | |
1372 | ||
1373 | return MSG_PROCESS_FINISHED_READING; | |
8ba708e5 MC |
1374 | } |
1375 | ||
38b051a1 TM |
1376 | static int set_client_ciphersuite(SSL_CONNECTION *s, |
1377 | const unsigned char *cipherchars) | |
b9908bf9 MC |
1378 | { |
1379 | STACK_OF(SSL_CIPHER) *sk; | |
1380 | const SSL_CIPHER *c; | |
11c67eea | 1381 | int i; |
38b051a1 | 1382 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
11c67eea MC |
1383 | |
1384 | c = ssl_get_cipher_by_char(s, cipherchars, 0); | |
1385 | if (c == NULL) { | |
1386 | /* unknown cipher */ | |
c48ffbcc | 1387 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_UNKNOWN_CIPHER_RETURNED); |
11c67eea MC |
1388 | return 0; |
1389 | } | |
1390 | /* | |
1391 | * If it is a disabled cipher we either didn't send it in client hello, | |
1392 | * or it's not allowed for the selected protocol. So we return an error. | |
1393 | */ | |
8af91fd9 | 1394 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK, 1)) { |
c48ffbcc | 1395 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CIPHER_RETURNED); |
11c67eea MC |
1396 | return 0; |
1397 | } | |
1398 | ||
1399 | sk = ssl_get_ciphers_by_id(s); | |
1400 | i = sk_SSL_CIPHER_find(sk, c); | |
1401 | if (i < 0) { | |
1402 | /* we did not say we would use this cipher */ | |
c48ffbcc | 1403 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CIPHER_RETURNED); |
11c67eea MC |
1404 | return 0; |
1405 | } | |
1406 | ||
38b051a1 | 1407 | if (SSL_CONNECTION_IS_TLS13(s) && s->s3.tmp.new_cipher != NULL |
555cbb32 | 1408 | && s->s3.tmp.new_cipher->id != c->id) { |
11c67eea | 1409 | /* ServerHello selected a different ciphersuite to that in the HRR */ |
c48ffbcc | 1410 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CIPHER_RETURNED); |
11c67eea MC |
1411 | return 0; |
1412 | } | |
1413 | ||
1414 | /* | |
1415 | * Depending on the session caching (internal/external), the cipher | |
1416 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
1417 | * set and use it for comparison. | |
1418 | */ | |
1419 | if (s->session->cipher != NULL) | |
1420 | s->session->cipher_id = s->session->cipher->id; | |
1421 | if (s->hit && (s->session->cipher_id != c->id)) { | |
38b051a1 TM |
1422 | if (SSL_CONNECTION_IS_TLS13(s)) { |
1423 | const EVP_MD *md = ssl_md(sctx, c->algorithm2); | |
b740012f | 1424 | |
a055a881 MC |
1425 | /* |
1426 | * In TLSv1.3 it is valid for the server to select a different | |
1427 | * ciphersuite as long as the hash is the same. | |
1428 | */ | |
b740012f | 1429 | if (md == NULL |
38b051a1 | 1430 | || md != ssl_md(sctx, s->session->cipher->algorithm2)) { |
f63a17d6 | 1431 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 | 1432 | SSL_R_CIPHERSUITE_DIGEST_HAS_CHANGED); |
a055a881 MC |
1433 | return 0; |
1434 | } | |
1435 | } else { | |
1436 | /* | |
1437 | * Prior to TLSv1.3 resuming a session always meant using the same | |
1438 | * ciphersuite. | |
1439 | */ | |
c48ffbcc | 1440 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 | 1441 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); |
a055a881 MC |
1442 | return 0; |
1443 | } | |
11c67eea | 1444 | } |
555cbb32 | 1445 | s->s3.tmp.new_cipher = c; |
11c67eea MC |
1446 | |
1447 | return 1; | |
1448 | } | |
1449 | ||
38b051a1 | 1450 | MSG_PROCESS_RETURN tls_process_server_hello(SSL_CONNECTION *s, PACKET *pkt) |
11c67eea | 1451 | { |
332eb390 | 1452 | PACKET session_id, extpkt; |
b9908bf9 | 1453 | size_t session_id_len; |
b6981744 | 1454 | const unsigned char *cipherchars; |
597c51bc | 1455 | int hrr = 0; |
b9908bf9 | 1456 | unsigned int compression; |
4fa52141 | 1457 | unsigned int sversion; |
3434f40b | 1458 | unsigned int context; |
332eb390 | 1459 | RAW_EXTENSION *extensions = NULL; |
38b051a1 | 1460 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
b9908bf9 MC |
1461 | #ifndef OPENSSL_NO_COMP |
1462 | SSL_COMP *comp; | |
1463 | #endif | |
1464 | ||
4fa52141 | 1465 | if (!PACKET_get_net_2(pkt, &sversion)) { |
c48ffbcc | 1466 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 1467 | goto err; |
4fa52141 | 1468 | } |
50932c4a | 1469 | |
c3043dcd | 1470 | /* load the server random */ |
597c51bc MC |
1471 | if (s->version == TLS1_3_VERSION |
1472 | && sversion == TLS1_2_VERSION | |
1473 | && PACKET_remaining(pkt) >= SSL3_RANDOM_SIZE | |
1474 | && memcmp(hrrrandom, PACKET_data(pkt), SSL3_RANDOM_SIZE) == 0) { | |
d204a50b TM |
1475 | if (s->hello_retry_request != SSL_HRR_NONE) { |
1476 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_R_UNEXPECTED_MESSAGE); | |
1477 | goto err; | |
1478 | } | |
fc7129dc | 1479 | s->hello_retry_request = SSL_HRR_PENDING; |
9cd9e097 | 1480 | /* Tell the record layer that we know we're going to get TLSv1.3 */ |
1d367677 MC |
1481 | if (!ssl_set_record_protocol_version(s, s->version)) { |
1482 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
1483 | goto err; | |
1484 | } | |
fc7129dc | 1485 | hrr = 1; |
597c51bc | 1486 | if (!PACKET_forward(pkt, SSL3_RANDOM_SIZE)) { |
c48ffbcc | 1487 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
597c51bc MC |
1488 | goto err; |
1489 | } | |
1490 | } else { | |
555cbb32 | 1491 | if (!PACKET_copy_bytes(pkt, s->s3.server_random, SSL3_RANDOM_SIZE)) { |
c48ffbcc | 1492 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
597c51bc MC |
1493 | goto err; |
1494 | } | |
c3043dcd MC |
1495 | } |
1496 | ||
88050dd1 MC |
1497 | /* Get the session-id. */ |
1498 | if (!PACKET_get_length_prefixed_1(pkt, &session_id)) { | |
c48ffbcc | 1499 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 1500 | goto err; |
0f113f3e | 1501 | } |
88050dd1 MC |
1502 | session_id_len = PACKET_remaining(&session_id); |
1503 | if (session_id_len > sizeof(s->session->session_id) | |
1504 | || session_id_len > SSL3_SESSION_ID_SIZE) { | |
c48ffbcc | 1505 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_SSL3_SESSION_ID_TOO_LONG); |
f63a17d6 | 1506 | goto err; |
524420d8 MC |
1507 | } |
1508 | ||
73999b62 | 1509 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
c48ffbcc | 1510 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 1511 | goto err; |
fc5ce51d EK |
1512 | } |
1513 | ||
88050dd1 | 1514 | if (!PACKET_get_1(pkt, &compression)) { |
c48ffbcc | 1515 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
88050dd1 | 1516 | goto err; |
4ff65f77 MC |
1517 | } |
1518 | ||
1519 | /* TLS extensions */ | |
597c51bc | 1520 | if (PACKET_remaining(pkt) == 0 && !hrr) { |
4ff65f77 | 1521 | PACKET_null_init(&extpkt); |
26b9172a MC |
1522 | } else if (!PACKET_as_length_prefixed_2(pkt, &extpkt) |
1523 | || PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 1524 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_LENGTH); |
f63a17d6 | 1525 | goto err; |
4ff65f77 MC |
1526 | } |
1527 | ||
597c51bc MC |
1528 | if (!hrr) { |
1529 | if (!tls_collect_extensions(s, &extpkt, | |
1530 | SSL_EXT_TLS1_2_SERVER_HELLO | |
1531 | | SSL_EXT_TLS1_3_SERVER_HELLO, | |
1532 | &extensions, NULL, 1)) { | |
1533 | /* SSLfatal() already called */ | |
1534 | goto err; | |
1535 | } | |
1536 | ||
1537 | if (!ssl_choose_client_version(s, sversion, extensions)) { | |
1538 | /* SSLfatal() already called */ | |
1539 | goto err; | |
1540 | } | |
88050dd1 MC |
1541 | } |
1542 | ||
38b051a1 | 1543 | if (SSL_CONNECTION_IS_TLS13(s) || hrr) { |
597c51bc MC |
1544 | if (compression != 0) { |
1545 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, | |
597c51bc MC |
1546 | SSL_R_INVALID_COMPRESSION_ALGORITHM); |
1547 | goto err; | |
1548 | } | |
1549 | ||
1550 | if (session_id_len != s->tmp_session_id_len | |
1551 | || memcmp(PACKET_data(&session_id), s->tmp_session_id, | |
1552 | session_id_len) != 0) { | |
c48ffbcc | 1553 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_INVALID_SESSION_ID); |
597c51bc MC |
1554 | goto err; |
1555 | } | |
1556 | } | |
1557 | ||
1558 | if (hrr) { | |
1559 | if (!set_client_ciphersuite(s, cipherchars)) { | |
1560 | /* SSLfatal() already called */ | |
1561 | goto err; | |
1562 | } | |
1563 | ||
1564 | return tls_process_as_hello_retry_request(s, &extpkt); | |
88050dd1 MC |
1565 | } |
1566 | ||
1567 | /* | |
1568 | * Now we have chosen the version we need to check again that the extensions | |
1569 | * are appropriate for this version. | |
1570 | */ | |
38b051a1 TM |
1571 | context = SSL_CONNECTION_IS_TLS13(s) ? SSL_EXT_TLS1_3_SERVER_HELLO |
1572 | : SSL_EXT_TLS1_2_SERVER_HELLO; | |
88050dd1 | 1573 | if (!tls_validate_all_contexts(s, context, extensions)) { |
c48ffbcc | 1574 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_EXTENSION); |
88050dd1 MC |
1575 | goto err; |
1576 | } | |
1577 | ||
4ff65f77 MC |
1578 | s->hit = 0; |
1579 | ||
38b051a1 | 1580 | if (SSL_CONNECTION_IS_TLS13(s)) { |
a5816a5a MC |
1581 | /* |
1582 | * In TLSv1.3 a ServerHello message signals a key change so the end of | |
1583 | * the message must be on a record boundary. | |
1584 | */ | |
1585 | if (RECORD_LAYER_processed_read_pending(&s->rlayer)) { | |
1586 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, | |
a5816a5a MC |
1587 | SSL_R_NOT_ON_RECORD_BOUNDARY); |
1588 | goto err; | |
1589 | } | |
1590 | ||
4ff65f77 MC |
1591 | /* This will set s->hit if we are resuming */ |
1592 | if (!tls_parse_extension(s, TLSEXT_IDX_psk, | |
fe874d27 | 1593 | SSL_EXT_TLS1_3_SERVER_HELLO, |
88050dd1 | 1594 | extensions, NULL, 0)) { |
f63a17d6 MC |
1595 | /* SSLfatal() already called */ |
1596 | goto err; | |
1597 | } | |
4ff65f77 | 1598 | } else { |
8c1a5343 | 1599 | /* |
4ff65f77 MC |
1600 | * Check if we can resume the session based on external pre-shared |
1601 | * secret. EAP-FAST (RFC 4851) supports two types of session resumption. | |
1602 | * Resumption based on server-side state works with session IDs. | |
1603 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
1604 | * works by overriding the SessionTicket extension at the application | |
1605 | * layer, and does not send a session ID. (We do not know whether | |
1606 | * EAP-FAST servers would honour the session ID.) Therefore, the session | |
1607 | * ID alone is not a reliable indicator of session resumption, so we | |
1608 | * first check if we can resume, and later peek at the next handshake | |
1609 | * message to see if the server wants to resume. | |
8c1a5343 | 1610 | */ |
4ff65f77 MC |
1611 | if (s->version >= TLS1_VERSION |
1612 | && s->ext.session_secret_cb != NULL && s->session->ext.tick) { | |
1613 | const SSL_CIPHER *pref_cipher = NULL; | |
1614 | /* | |
1615 | * s->session->master_key_length is a size_t, but this is an int for | |
1616 | * backwards compat reasons | |
1617 | */ | |
1618 | int master_key_length; | |
38b051a1 | 1619 | |
4ff65f77 | 1620 | master_key_length = sizeof(s->session->master_key); |
38b051a1 | 1621 | if (s->ext.session_secret_cb(ssl, s->session->master_key, |
4ff65f77 MC |
1622 | &master_key_length, |
1623 | NULL, &pref_cipher, | |
1624 | s->ext.session_secret_cb_arg) | |
1625 | && master_key_length > 0) { | |
1626 | s->session->master_key_length = master_key_length; | |
1627 | s->session->cipher = pref_cipher ? | |
60d685d1 | 1628 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars, 0); |
4ff65f77 | 1629 | } else { |
c48ffbcc | 1630 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f63a17d6 | 1631 | goto err; |
4ff65f77 | 1632 | } |
0f113f3e | 1633 | } |
4ff65f77 MC |
1634 | |
1635 | if (session_id_len != 0 | |
1636 | && session_id_len == s->session->session_id_length | |
1637 | && memcmp(PACKET_data(&session_id), s->session->session_id, | |
1638 | session_id_len) == 0) | |
1639 | s->hit = 1; | |
50932c4a MC |
1640 | } |
1641 | ||
4ff65f77 | 1642 | if (s->hit) { |
0f113f3e | 1643 | if (s->sid_ctx_length != s->session->sid_ctx_length |
4ff65f77 | 1644 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { |
0f113f3e | 1645 | /* actually a client application bug */ |
f63a17d6 | 1646 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 MC |
1647 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); |
1648 | goto err; | |
0f113f3e | 1649 | } |
6e3d0153 | 1650 | } else { |
0f113f3e | 1651 | /* |
6e3d0153 | 1652 | * If we were trying for session-id reuse but the server |
4ff65f77 | 1653 | * didn't resume, make a new SSL_SESSION. |
6e3d0153 EK |
1654 | * In the case of EAP-FAST and PAC, we do not send a session ID, |
1655 | * so the PAC-based session secret is always preserved. It'll be | |
1656 | * overwritten if the server refuses resumption. | |
0f113f3e | 1657 | */ |
c96ce52c | 1658 | if (s->session->session_id_length > 0) { |
acce0557 | 1659 | ssl_tsan_counter(s->session_ctx, &s->session_ctx->stats.sess_miss); |
0f113f3e | 1660 | if (!ssl_get_new_session(s, 0)) { |
f63a17d6 MC |
1661 | /* SSLfatal() already called */ |
1662 | goto err; | |
0f113f3e MC |
1663 | } |
1664 | } | |
50932c4a | 1665 | |
ccae4a15 | 1666 | s->session->ssl_version = s->version; |
a5816a5a MC |
1667 | /* |
1668 | * In TLSv1.2 and below we save the session id we were sent so we can | |
1669 | * resume it later. In TLSv1.3 the session id we were sent is just an | |
1670 | * echo of what we originally sent in the ClientHello and should not be | |
1671 | * used for resumption. | |
1672 | */ | |
38b051a1 | 1673 | if (!SSL_CONNECTION_IS_TLS13(s)) { |
a5816a5a MC |
1674 | s->session->session_id_length = session_id_len; |
1675 | /* session_id_len could be 0 */ | |
1676 | if (session_id_len > 0) | |
1677 | memcpy(s->session->session_id, PACKET_data(&session_id), | |
1678 | session_id_len); | |
1679 | } | |
0f113f3e | 1680 | } |
fc5ce51d | 1681 | |
ccae4a15 FI |
1682 | /* Session version and negotiated protocol version should match */ |
1683 | if (s->version != s->session->ssl_version) { | |
c48ffbcc | 1684 | SSLfatal(s, SSL_AD_PROTOCOL_VERSION, |
f63a17d6 MC |
1685 | SSL_R_SSL_SESSION_VERSION_MISMATCH); |
1686 | goto err; | |
ccae4a15 | 1687 | } |
0f113f3e | 1688 | /* |
3eb2aff4 KR |
1689 | * Now that we know the version, update the check to see if it's an allowed |
1690 | * version. | |
1691 | */ | |
555cbb32 TS |
1692 | s->s3.tmp.min_ver = s->version; |
1693 | s->s3.tmp.max_ver = s->version; | |
0f113f3e | 1694 | |
11c67eea | 1695 | if (!set_client_ciphersuite(s, cipherchars)) { |
f63a17d6 MC |
1696 | /* SSLfatal() already called */ |
1697 | goto err; | |
0f113f3e MC |
1698 | } |
1699 | ||
09b6c2ef | 1700 | #ifdef OPENSSL_NO_COMP |
fc5ce51d | 1701 | if (compression != 0) { |
c48ffbcc | 1702 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 MC |
1703 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1704 | goto err; | |
0f113f3e MC |
1705 | } |
1706 | /* | |
1707 | * If compression is disabled we'd better not try to resume a session | |
1708 | * using compression. | |
1709 | */ | |
1710 | if (s->session->compress_meth != 0) { | |
c48ffbcc | 1711 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_INCONSISTENT_COMPRESSION); |
f63a17d6 | 1712 | goto err; |
0f113f3e | 1713 | } |
09b6c2ef | 1714 | #else |
fc5ce51d | 1715 | if (s->hit && compression != s->session->compress_meth) { |
c48ffbcc | 1716 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
dd5a4279 | 1717 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); |
f63a17d6 | 1718 | goto err; |
0f113f3e | 1719 | } |
fc5ce51d | 1720 | if (compression == 0) |
0f113f3e MC |
1721 | comp = NULL; |
1722 | else if (!ssl_allow_compression(s)) { | |
c48ffbcc | 1723 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_COMPRESSION_DISABLED); |
f63a17d6 | 1724 | goto err; |
fc5ce51d | 1725 | } else { |
38b051a1 TM |
1726 | comp = ssl3_comp_find(SSL_CONNECTION_GET_CTX(s)->comp_methods, |
1727 | compression); | |
fc5ce51d | 1728 | } |
0f113f3e | 1729 | |
fc5ce51d | 1730 | if (compression != 0 && comp == NULL) { |
c48ffbcc | 1731 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 MC |
1732 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1733 | goto err; | |
0f113f3e | 1734 | } else { |
555cbb32 | 1735 | s->s3.tmp.new_compression = comp; |
0f113f3e | 1736 | } |
09b6c2ef | 1737 | #endif |
761772d7 | 1738 | |
f63a17d6 MC |
1739 | if (!tls_parse_all_extensions(s, context, extensions, NULL, 0, 1)) { |
1740 | /* SSLfatal() already called */ | |
1741 | goto err; | |
1742 | } | |
332eb390 | 1743 | |
8723588e | 1744 | #ifndef OPENSSL_NO_SCTP |
38b051a1 | 1745 | if (SSL_CONNECTION_IS_DTLS(s) && s->hit) { |
8723588e MC |
1746 | unsigned char sctpauthkey[64]; |
1747 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
09d62b33 | 1748 | size_t labellen; |
8723588e MC |
1749 | |
1750 | /* | |
1751 | * Add new shared key for SCTP-Auth, will be ignored if | |
1752 | * no SCTP used. | |
1753 | */ | |
141eb8c6 MC |
1754 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
1755 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
8723588e | 1756 | |
09d62b33 MT |
1757 | /* Don't include the terminating zero. */ |
1758 | labellen = sizeof(labelbuffer) - 1; | |
1759 | if (s->mode & SSL_MODE_DTLS_SCTP_LABEL_LENGTH_BUG) | |
1760 | labellen += 1; | |
1761 | ||
38b051a1 | 1762 | if (SSL_export_keying_material(ssl, sctpauthkey, |
a230b26e EK |
1763 | sizeof(sctpauthkey), |
1764 | labelbuffer, | |
09d62b33 | 1765 | labellen, NULL, 0, 0) <= 0) { |
c48ffbcc | 1766 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f63a17d6 MC |
1767 | goto err; |
1768 | } | |
8723588e | 1769 | |
38b051a1 | 1770 | BIO_ctrl(SSL_get_wbio(ssl), |
8723588e MC |
1771 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, |
1772 | sizeof(sctpauthkey), sctpauthkey); | |
1773 | } | |
1774 | #endif | |
1775 | ||
92760c21 MC |
1776 | /* |
1777 | * In TLSv1.3 we have some post-processing to change cipher state, otherwise | |
1778 | * we're done with this message | |
1779 | */ | |
38b051a1 TM |
1780 | if (SSL_CONNECTION_IS_TLS13(s) |
1781 | && (!ssl->method->ssl3_enc->setup_key_block(s) | |
1782 | || !ssl->method->ssl3_enc->change_cipher_state(s, | |
92760c21 | 1783 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_READ))) { |
f63a17d6 MC |
1784 | /* SSLfatal() already called */ |
1785 | goto err; | |
92760c21 MC |
1786 | } |
1787 | ||
1b0286a3 | 1788 | OPENSSL_free(extensions); |
b9908bf9 | 1789 | return MSG_PROCESS_CONTINUE_READING; |
f63a17d6 | 1790 | err: |
1b0286a3 | 1791 | OPENSSL_free(extensions); |
b9908bf9 | 1792 | return MSG_PROCESS_ERROR; |
0f113f3e | 1793 | } |
d02b48c6 | 1794 | |
38b051a1 | 1795 | static MSG_PROCESS_RETURN tls_process_as_hello_retry_request(SSL_CONNECTION *s, |
597c51bc | 1796 | PACKET *extpkt) |
3847d426 | 1797 | { |
3847d426 | 1798 | RAW_EXTENSION *extensions = NULL; |
3847d426 | 1799 | |
d4504fe5 | 1800 | /* |
f471f60a MC |
1801 | * If we were sending early_data then any alerts should not be sent using |
1802 | * the old wrlmethod. | |
d4504fe5 | 1803 | */ |
f471f60a MC |
1804 | if (s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING |
1805 | && !ssl_set_new_record_layer(s, | |
1806 | TLS_ANY_VERSION, | |
1807 | OSSL_RECORD_DIRECTION_WRITE, | |
1808 | OSSL_RECORD_PROTECTION_LEVEL_NONE, | |
3f9175c7 MC |
1809 | NULL, 0, NULL, 0, NULL, 0, NULL, 0, |
1810 | NULL, 0, NID_undef, NULL, NULL, NULL)) { | |
f471f60a MC |
1811 | /* SSLfatal already called */ |
1812 | goto err; | |
1813 | } | |
1814 | /* We are definitely going to be using TLSv1.3 */ | |
1815 | s->rlayer.wrlmethod->set_protocol_version(s->rlayer.wrl, TLS1_3_VERSION); | |
d4504fe5 | 1816 | |
597c51bc | 1817 | if (!tls_collect_extensions(s, extpkt, SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST, |
f63a17d6 | 1818 | &extensions, NULL, 1) |
fe874d27 | 1819 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST, |
f63a17d6 MC |
1820 | extensions, NULL, 0, 1)) { |
1821 | /* SSLfatal() already called */ | |
1822 | goto err; | |
1823 | } | |
3847d426 MC |
1824 | |
1825 | OPENSSL_free(extensions); | |
66d4bf6b MC |
1826 | extensions = NULL; |
1827 | ||
5b64ce89 | 1828 | if (s->ext.tls13_cookie_len == 0 && s->s3.tmp.pkey != NULL) { |
66d4bf6b MC |
1829 | /* |
1830 | * We didn't receive a cookie or a new key_share so the next | |
1831 | * ClientHello will not change | |
1832 | */ | |
c48ffbcc | 1833 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_NO_CHANGE_FOLLOWING_HRR); |
f63a17d6 | 1834 | goto err; |
66d4bf6b | 1835 | } |
3847d426 | 1836 | |
11c67eea MC |
1837 | /* |
1838 | * Re-initialise the Transcript Hash. We're going to prepopulate it with | |
1839 | * a synthetic message_hash in place of ClientHello1. | |
1840 | */ | |
43054d3d | 1841 | if (!create_synthetic_message_hash(s, NULL, 0, NULL, 0)) { |
f63a17d6 MC |
1842 | /* SSLfatal() already called */ |
1843 | goto err; | |
11c67eea MC |
1844 | } |
1845 | ||
1846 | /* | |
1847 | * Add this message to the Transcript Hash. Normally this is done | |
1848 | * automatically prior to the message processing stage. However due to the | |
1849 | * need to create the synthetic message hash, we defer that step until now | |
1850 | * for HRR messages. | |
1851 | */ | |
1852 | if (!ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, | |
1853 | s->init_num + SSL3_HM_HEADER_LENGTH)) { | |
f63a17d6 MC |
1854 | /* SSLfatal() already called */ |
1855 | goto err; | |
11c67eea MC |
1856 | } |
1857 | ||
3847d426 | 1858 | return MSG_PROCESS_FINISHED_READING; |
f63a17d6 | 1859 | err: |
3847d426 MC |
1860 | OPENSSL_free(extensions); |
1861 | return MSG_PROCESS_ERROR; | |
1862 | } | |
1863 | ||
3c95ef22 TS |
1864 | MSG_PROCESS_RETURN tls_process_server_rpk(SSL_CONNECTION *sc, PACKET *pkt) |
1865 | { | |
1866 | EVP_PKEY *peer_rpk; | |
1867 | ||
1868 | if (!tls_process_rpk(sc, pkt, &peer_rpk)) { | |
1869 | /* SSLfatal() already called */ | |
1870 | return MSG_PROCESS_ERROR; | |
1871 | } | |
1872 | ||
1873 | if (peer_rpk == NULL) { | |
1874 | SSLfatal(sc, SSL_AD_DECODE_ERROR, SSL_R_BAD_CERTIFICATE); | |
1875 | return MSG_PROCESS_ERROR; | |
1876 | } | |
1877 | ||
1878 | EVP_PKEY_free(sc->session->peer_rpk); | |
1879 | sc->session->peer_rpk = peer_rpk; | |
1880 | ||
1881 | return MSG_PROCESS_CONTINUE_PROCESSING; | |
1882 | } | |
1883 | ||
1884 | static WORK_STATE tls_post_process_server_rpk(SSL_CONNECTION *sc, | |
1885 | WORK_STATE wst) | |
1886 | { | |
1887 | size_t certidx; | |
1888 | const SSL_CERT_LOOKUP *clu; | |
1889 | ||
1890 | if (sc->session->peer_rpk == NULL) { | |
1891 | SSLfatal(sc, SSL_AD_ILLEGAL_PARAMETER, | |
1892 | SSL_R_INVALID_RAW_PUBLIC_KEY); | |
1893 | return WORK_ERROR; | |
1894 | } | |
1895 | ||
1896 | if (sc->rwstate == SSL_RETRY_VERIFY) | |
1897 | sc->rwstate = SSL_NOTHING; | |
1898 | if (ssl_verify_rpk(sc, sc->session->peer_rpk) > 0 | |
1899 | && sc->rwstate == SSL_RETRY_VERIFY) | |
1900 | return WORK_MORE_A; | |
1901 | ||
1902 | if ((clu = ssl_cert_lookup_by_pkey(sc->session->peer_rpk, &certidx, | |
1903 | SSL_CONNECTION_GET_CTX(sc))) == NULL) { | |
1904 | SSLfatal(sc, SSL_AD_ILLEGAL_PARAMETER, SSL_R_UNKNOWN_CERTIFICATE_TYPE); | |
1905 | return WORK_ERROR; | |
1906 | } | |
1907 | ||
1908 | /* | |
1909 | * Check certificate type is consistent with ciphersuite. For TLS 1.3 | |
1910 | * skip check since TLS 1.3 ciphersuites can be used with any certificate | |
1911 | * type. | |
1912 | */ | |
1913 | if (!SSL_CONNECTION_IS_TLS13(sc)) { | |
1914 | if ((clu->amask & sc->s3.tmp.new_cipher->algorithm_auth) == 0) { | |
1915 | SSLfatal(sc, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_RPK_TYPE); | |
1916 | return WORK_ERROR; | |
1917 | } | |
1918 | } | |
1919 | ||
1920 | /* Ensure there is no peer/peer_chain */ | |
1921 | X509_free(sc->session->peer); | |
1922 | sc->session->peer = NULL; | |
1923 | sk_X509_pop_free(sc->session->peer_chain, X509_free); | |
1924 | sc->session->peer_chain = NULL; | |
1925 | sc->session->verify_result = sc->verify_result; | |
1926 | ||
1927 | /* Save the current hash state for when we receive the CertificateVerify */ | |
1928 | if (SSL_CONNECTION_IS_TLS13(sc) | |
1929 | && !ssl_handshake_hash(sc, sc->cert_verify_hash, | |
1930 | sizeof(sc->cert_verify_hash), | |
1931 | &sc->cert_verify_hash_len)) { | |
1932 | /* SSLfatal() already called */ | |
1933 | return WORK_ERROR; | |
1934 | } | |
1935 | ||
1936 | return WORK_FINISHED_CONTINUE; | |
1937 | } | |
1938 | ||
3201abeb | 1939 | /* prepare server cert verification by setting s->session->peer_chain from pkt */ |
38b051a1 TM |
1940 | MSG_PROCESS_RETURN tls_process_server_certificate(SSL_CONNECTION *s, |
1941 | PACKET *pkt) | |
b9908bf9 | 1942 | { |
b9908bf9 MC |
1943 | unsigned long cert_list_len, cert_len; |
1944 | X509 *x = NULL; | |
b6981744 | 1945 | const unsigned char *certstart, *certbytes; |
0c3eb279 | 1946 | size_t chainidx; |
e96e0f8e | 1947 | unsigned int context = 0; |
38b051a1 | 1948 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
0f113f3e | 1949 | |
3c95ef22 TS |
1950 | if (s->ext.server_cert_type == TLSEXT_cert_type_rpk) |
1951 | return tls_process_server_rpk(s, pkt); | |
1952 | if (s->ext.server_cert_type != TLSEXT_cert_type_x509) { | |
1953 | SSLfatal(s, SSL_AD_UNSUPPORTED_CERTIFICATE, | |
1954 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); | |
1955 | goto err; | |
1956 | } | |
1957 | ||
0c3eb279 | 1958 | if ((s->session->peer_chain = sk_X509_new_null()) == NULL) { |
e077455e | 1959 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
cc273a93 | 1960 | goto err; |
0f113f3e MC |
1961 | } |
1962 | ||
38b051a1 | 1963 | if ((SSL_CONNECTION_IS_TLS13(s) && !PACKET_get_1(pkt, &context)) |
e96e0f8e MC |
1964 | || context != 0 |
1965 | || !PACKET_get_net_3(pkt, &cert_list_len) | |
1a281aab MC |
1966 | || PACKET_remaining(pkt) != cert_list_len |
1967 | || PACKET_remaining(pkt) == 0) { | |
c48ffbcc | 1968 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 1969 | goto err; |
0f113f3e | 1970 | } |
d805a57b | 1971 | for (chainidx = 0; PACKET_remaining(pkt); chainidx++) { |
73999b62 | 1972 | if (!PACKET_get_net_3(pkt, &cert_len) |
a230b26e | 1973 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) { |
c48ffbcc | 1974 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_CERT_LENGTH_MISMATCH); |
f63a17d6 | 1975 | goto err; |
0f113f3e MC |
1976 | } |
1977 | ||
df758a85 | 1978 | certstart = certbytes; |
38b051a1 | 1979 | x = X509_new_ex(sctx->libctx, sctx->propq); |
0f113f3e | 1980 | if (x == NULL) { |
e077455e | 1981 | SSLfatal(s, SSL_AD_DECODE_ERROR, ERR_R_ASN1_LIB); |
6725682d SL |
1982 | goto err; |
1983 | } | |
1984 | if (d2i_X509(&x, (const unsigned char **)&certbytes, | |
1985 | cert_len) == NULL) { | |
c48ffbcc | 1986 | SSLfatal(s, SSL_AD_BAD_CERTIFICATE, ERR_R_ASN1_LIB); |
f63a17d6 | 1987 | goto err; |
0f113f3e | 1988 | } |
6725682d | 1989 | |
df758a85 | 1990 | if (certbytes != (certstart + cert_len)) { |
c48ffbcc | 1991 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_CERT_LENGTH_MISMATCH); |
f63a17d6 | 1992 | goto err; |
0f113f3e | 1993 | } |
e96e0f8e | 1994 | |
38b051a1 | 1995 | if (SSL_CONNECTION_IS_TLS13(s)) { |
e96e0f8e MC |
1996 | RAW_EXTENSION *rawexts = NULL; |
1997 | PACKET extensions; | |
1998 | ||
1999 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
c48ffbcc | 2000 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_LENGTH); |
f63a17d6 | 2001 | goto err; |
e96e0f8e | 2002 | } |
fe874d27 MC |
2003 | if (!tls_collect_extensions(s, &extensions, |
2004 | SSL_EXT_TLS1_3_CERTIFICATE, &rawexts, | |
f63a17d6 | 2005 | NULL, chainidx == 0) |
8e1634ec | 2006 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE, |
f63a17d6 | 2007 | rawexts, x, chainidx, |
8e1634ec | 2008 | PACKET_remaining(pkt) == 0)) { |
5ee289ea | 2009 | OPENSSL_free(rawexts); |
f63a17d6 MC |
2010 | /* SSLfatal already called */ |
2011 | goto err; | |
5ee289ea MC |
2012 | } |
2013 | OPENSSL_free(rawexts); | |
e96e0f8e MC |
2014 | } |
2015 | ||
0c3eb279 | 2016 | if (!sk_X509_push(s->session->peer_chain, x)) { |
e077455e | 2017 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
cc273a93 | 2018 | goto err; |
0f113f3e MC |
2019 | } |
2020 | x = NULL; | |
0f113f3e | 2021 | } |
0c3eb279 DDO |
2022 | return MSG_PROCESS_CONTINUE_PROCESSING; |
2023 | ||
2024 | err: | |
2025 | X509_free(x); | |
79b2a2f2 | 2026 | OSSL_STACK_OF_X509_free(s->session->peer_chain); |
0c3eb279 DDO |
2027 | s->session->peer_chain = NULL; |
2028 | return MSG_PROCESS_ERROR; | |
2029 | } | |
0f113f3e | 2030 | |
0c3eb279 DDO |
2031 | /* |
2032 | * Verify the s->session->peer_chain and check server cert type. | |
2033 | * On success set s->session->peer and s->session->verify_result. | |
2034 | * Else the peer certificate verification callback may request retry. | |
2035 | */ | |
38b051a1 TM |
2036 | WORK_STATE tls_post_process_server_certificate(SSL_CONNECTION *s, |
2037 | WORK_STATE wst) | |
0c3eb279 DDO |
2038 | { |
2039 | X509 *x; | |
2040 | EVP_PKEY *pkey = NULL; | |
2041 | const SSL_CERT_LOOKUP *clu; | |
2042 | size_t certidx; | |
2043 | int i; | |
2044 | ||
3c95ef22 TS |
2045 | if (s->ext.server_cert_type == TLSEXT_cert_type_rpk) |
2046 | return tls_post_process_server_rpk(s, wst); | |
2047 | ||
dfb39f73 TM |
2048 | if (s->rwstate == SSL_RETRY_VERIFY) |
2049 | s->rwstate = SSL_NOTHING; | |
0c3eb279 | 2050 | i = ssl_verify_cert_chain(s, s->session->peer_chain); |
dfb39f73 | 2051 | if (i > 0 && s->rwstate == SSL_RETRY_VERIFY) { |
0c3eb279 DDO |
2052 | return WORK_MORE_A; |
2053 | } | |
c8e2f98c MC |
2054 | /* |
2055 | * The documented interface is that SSL_VERIFY_PEER should be set in order | |
2056 | * for client side verification of the server certificate to take place. | |
2057 | * However, historically the code has only checked that *any* flag is set | |
2058 | * to cause server verification to take place. Use of the other flags makes | |
2059 | * no sense in client mode. An attempt to clean up the semantics was | |
2060 | * reverted because at least one application *only* set | |
2061 | * SSL_VERIFY_FAIL_IF_NO_PEER_CERT. Prior to the clean up this still caused | |
2062 | * server verification to take place, after the clean up it silently did | |
2063 | * nothing. SSL_CTX_set_verify()/SSL_set_verify() cannot validate the flags | |
2064 | * sent to them because they are void functions. Therefore, we now use the | |
2065 | * (less clean) historic behaviour of performing validation if any flag is | |
2066 | * set. The *documented* interface remains the same. | |
2067 | */ | |
dfb39f73 | 2068 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) { |
c6d38183 | 2069 | SSLfatal(s, ssl_x509err2alert(s->verify_result), |
f63a17d6 | 2070 | SSL_R_CERTIFICATE_VERIFY_FAILED); |
0c3eb279 | 2071 | return WORK_ERROR; |
0f113f3e MC |
2072 | } |
2073 | ERR_clear_error(); /* but we keep s->verify_result */ | |
0f113f3e | 2074 | |
0f113f3e MC |
2075 | /* |
2076 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
d4d78943 | 2077 | * which we don't include in statem_srvr.c |
0f113f3e | 2078 | */ |
0c3eb279 | 2079 | x = sk_X509_value(s->session->peer_chain, 0); |
0f113f3e | 2080 | |
8382fd3a | 2081 | pkey = X509_get0_pubkey(x); |
0f113f3e | 2082 | |
55a9a16f | 2083 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
c48ffbcc | 2084 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
f63a17d6 | 2085 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); |
0c3eb279 | 2086 | return WORK_ERROR; |
0f113f3e MC |
2087 | } |
2088 | ||
ee58915c MB |
2089 | if ((clu = ssl_cert_lookup_by_pkey(pkey, &certidx, |
2090 | SSL_CONNECTION_GET_CTX(s))) == NULL) { | |
c48ffbcc | 2091 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_UNKNOWN_CERTIFICATE_TYPE); |
0c3eb279 | 2092 | return WORK_ERROR; |
0f113f3e | 2093 | } |
05b8486e DSH |
2094 | /* |
2095 | * Check certificate type is consistent with ciphersuite. For TLS 1.3 | |
2096 | * skip check since TLS 1.3 ciphersuites can be used with any certificate | |
2097 | * type. | |
2098 | */ | |
38b051a1 | 2099 | if (!SSL_CONNECTION_IS_TLS13(s)) { |
555cbb32 | 2100 | if ((clu->amask & s->s3.tmp.new_cipher->algorithm_auth) == 0) { |
c48ffbcc | 2101 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CERTIFICATE_TYPE); |
0c3eb279 | 2102 | return WORK_ERROR; |
05b8486e | 2103 | } |
0f113f3e | 2104 | } |
55a9a16f MC |
2105 | |
2106 | X509_free(s->session->peer); | |
05f0fb9f | 2107 | X509_up_ref(x); |
55a9a16f | 2108 | s->session->peer = x; |
0f113f3e | 2109 | s->session->verify_result = s->verify_result; |
3c95ef22 TS |
2110 | /* Ensure there is no RPK */ |
2111 | EVP_PKEY_free(s->session->peer_rpk); | |
2112 | s->session->peer_rpk = NULL; | |
2c5dfdc3 MC |
2113 | |
2114 | /* Save the current hash state for when we receive the CertificateVerify */ | |
38b051a1 | 2115 | if (SSL_CONNECTION_IS_TLS13(s) |
2c5dfdc3 MC |
2116 | && !ssl_handshake_hash(s, s->cert_verify_hash, |
2117 | sizeof(s->cert_verify_hash), | |
2118 | &s->cert_verify_hash_len)) { | |
f63a17d6 | 2119 | /* SSLfatal() already called */; |
0c3eb279 | 2120 | return WORK_ERROR; |
2c5dfdc3 | 2121 | } |
0c3eb279 | 2122 | return WORK_FINISHED_CONTINUE; |
0f113f3e | 2123 | } |
d02b48c6 | 2124 | |
b67cb09f TS |
2125 | #ifndef OPENSSL_NO_COMP_ALG |
2126 | MSG_PROCESS_RETURN tls_process_server_compressed_certificate(SSL_CONNECTION *sc, PACKET *pkt) | |
2127 | { | |
2128 | MSG_PROCESS_RETURN ret = MSG_PROCESS_ERROR; | |
2129 | PACKET tmppkt; | |
2130 | BUF_MEM *buf = BUF_MEM_new(); | |
2131 | ||
2132 | if (tls13_process_compressed_certificate(sc, pkt, &tmppkt, buf) != MSG_PROCESS_ERROR) | |
2133 | ret = tls_process_server_certificate(sc, &tmppkt); | |
2134 | ||
2135 | BUF_MEM_free(buf); | |
2136 | return ret; | |
2137 | } | |
2138 | #endif | |
2139 | ||
38b051a1 | 2140 | static int tls_process_ske_psk_preamble(SSL_CONNECTION *s, PACKET *pkt) |
02a74590 MC |
2141 | { |
2142 | #ifndef OPENSSL_NO_PSK | |
7dc1c647 | 2143 | PACKET psk_identity_hint; |
02a74590 | 2144 | |
7dc1c647 MC |
2145 | /* PSK ciphersuites are preceded by an identity hint */ |
2146 | ||
2147 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) { | |
c48ffbcc | 2148 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
7dc1c647 MC |
2149 | return 0; |
2150 | } | |
2151 | ||
2152 | /* | |
2153 | * Store PSK identity hint for later use, hint is used in | |
2154 | * tls_construct_client_key_exchange. Assume that the maximum length of | |
2155 | * a PSK identity hint can be as long as the maximum length of a PSK | |
2156 | * identity. | |
2157 | */ | |
2158 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { | |
c48ffbcc | 2159 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_DATA_LENGTH_TOO_LONG); |
7dc1c647 MC |
2160 | return 0; |
2161 | } | |
02a74590 | 2162 | |
7dc1c647 MC |
2163 | if (PACKET_remaining(&psk_identity_hint) == 0) { |
2164 | OPENSSL_free(s->session->psk_identity_hint); | |
2165 | s->session->psk_identity_hint = NULL; | |
2166 | } else if (!PACKET_strndup(&psk_identity_hint, | |
a230b26e | 2167 | &s->session->psk_identity_hint)) { |
c48ffbcc | 2168 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
7dc1c647 MC |
2169 | return 0; |
2170 | } | |
2171 | ||
2172 | return 1; | |
2173 | #else | |
c48ffbcc | 2174 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
7dc1c647 | 2175 | return 0; |
02a74590 MC |
2176 | #endif |
2177 | } | |
2178 | ||
38b051a1 | 2179 | static int tls_process_ske_srp(SSL_CONNECTION *s, PACKET *pkt, EVP_PKEY **pkey) |
25c6c10c MC |
2180 | { |
2181 | #ifndef OPENSSL_NO_SRP | |
2182 | PACKET prime, generator, salt, server_pub; | |
2183 | ||
2184 | if (!PACKET_get_length_prefixed_2(pkt, &prime) | |
2185 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
2186 | || !PACKET_get_length_prefixed_1(pkt, &salt) | |
2187 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) { | |
c48ffbcc | 2188 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
25c6c10c MC |
2189 | return 0; |
2190 | } | |
2191 | ||
2192 | if ((s->srp_ctx.N = | |
2193 | BN_bin2bn(PACKET_data(&prime), | |
348240c6 | 2194 | (int)PACKET_remaining(&prime), NULL)) == NULL |
25c6c10c MC |
2195 | || (s->srp_ctx.g = |
2196 | BN_bin2bn(PACKET_data(&generator), | |
348240c6 | 2197 | (int)PACKET_remaining(&generator), NULL)) == NULL |
25c6c10c MC |
2198 | || (s->srp_ctx.s = |
2199 | BN_bin2bn(PACKET_data(&salt), | |
348240c6 | 2200 | (int)PACKET_remaining(&salt), NULL)) == NULL |
25c6c10c MC |
2201 | || (s->srp_ctx.B = |
2202 | BN_bin2bn(PACKET_data(&server_pub), | |
348240c6 | 2203 | (int)PACKET_remaining(&server_pub), NULL)) == NULL) { |
c48ffbcc | 2204 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_BN_LIB); |
25c6c10c MC |
2205 | return 0; |
2206 | } | |
2207 | ||
a2c2e000 MC |
2208 | if (!srp_verify_server_param(s)) { |
2209 | /* SSLfatal() already called */ | |
25c6c10c MC |
2210 | return 0; |
2211 | } | |
2212 | ||
2213 | /* We must check if there is a certificate */ | |
555cbb32 | 2214 | if (s->s3.tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
3c95ef22 | 2215 | *pkey = tls_get_peer_pkey(s); |
25c6c10c MC |
2216 | |
2217 | return 1; | |
2218 | #else | |
c48ffbcc | 2219 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
25c6c10c MC |
2220 | return 0; |
2221 | #endif | |
2222 | } | |
2223 | ||
38b051a1 | 2224 | static int tls_process_ske_dhe(SSL_CONNECTION *s, PACKET *pkt, EVP_PKEY **pkey) |
e01a610d | 2225 | { |
e01a610d MC |
2226 | PACKET prime, generator, pub_key; |
2227 | EVP_PKEY *peer_tmp = NULL; | |
e01a610d | 2228 | BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL; |
1ee22dc2 MC |
2229 | EVP_PKEY_CTX *pctx = NULL; |
2230 | OSSL_PARAM *params = NULL; | |
2231 | OSSL_PARAM_BLD *tmpl = NULL; | |
38b051a1 | 2232 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
1ee22dc2 | 2233 | int ret = 0; |
26505153 | 2234 | |
e01a610d MC |
2235 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
2236 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
2237 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) { | |
c48ffbcc | 2238 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
e01a610d MC |
2239 | return 0; |
2240 | } | |
2241 | ||
348240c6 MC |
2242 | p = BN_bin2bn(PACKET_data(&prime), (int)PACKET_remaining(&prime), NULL); |
2243 | g = BN_bin2bn(PACKET_data(&generator), (int)PACKET_remaining(&generator), | |
2244 | NULL); | |
2245 | bnpub_key = BN_bin2bn(PACKET_data(&pub_key), | |
2246 | (int)PACKET_remaining(&pub_key), NULL); | |
e01a610d | 2247 | if (p == NULL || g == NULL || bnpub_key == NULL) { |
c48ffbcc | 2248 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_BN_LIB); |
e01a610d MC |
2249 | goto err; |
2250 | } | |
2251 | ||
1ee22dc2 MC |
2252 | tmpl = OSSL_PARAM_BLD_new(); |
2253 | if (tmpl == NULL | |
2254 | || !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_P, p) | |
2255 | || !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_G, g) | |
2256 | || !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_PUB_KEY, | |
2257 | bnpub_key) | |
2258 | || (params = OSSL_PARAM_BLD_to_param(tmpl)) == NULL) { | |
2259 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
e01a610d MC |
2260 | goto err; |
2261 | } | |
e01a610d | 2262 | |
38b051a1 | 2263 | pctx = EVP_PKEY_CTX_new_from_name(sctx->libctx, "DH", sctx->propq); |
1ee22dc2 MC |
2264 | if (pctx == NULL) { |
2265 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
26505153 RL |
2266 | goto err; |
2267 | } | |
2db985b7 SL |
2268 | if (EVP_PKEY_fromdata_init(pctx) <= 0 |
2269 | || EVP_PKEY_fromdata(pctx, &peer_tmp, EVP_PKEY_KEYPAIR, params) <= 0) { | |
1ee22dc2 | 2270 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_DH_VALUE); |
e01a610d MC |
2271 | goto err; |
2272 | } | |
e01a610d | 2273 | |
1ee22dc2 | 2274 | EVP_PKEY_CTX_free(pctx); |
38b051a1 | 2275 | pctx = EVP_PKEY_CTX_new_from_pkey(sctx->libctx, peer_tmp, sctx->propq); |
1ee22dc2 | 2276 | if (pctx == NULL |
899e2564 MC |
2277 | /* |
2278 | * EVP_PKEY_param_check() will verify that the DH params are using | |
2279 | * a safe prime. In this context, because we're using ephemeral DH, | |
2280 | * we're ok with it not being a safe prime. | |
2281 | * EVP_PKEY_param_check_quick() skips the safe prime check. | |
2282 | */ | |
2283 | || EVP_PKEY_param_check_quick(pctx) != 1 | |
1ee22dc2 MC |
2284 | || EVP_PKEY_public_check(pctx) != 1) { |
2285 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_DH_VALUE); | |
e01a610d MC |
2286 | goto err; |
2287 | } | |
2288 | ||
ed576acd TM |
2289 | if (!ssl_security(s, SSL_SECOP_TMP_DH, |
2290 | EVP_PKEY_get_security_bits(peer_tmp), | |
47e81a1b | 2291 | 0, peer_tmp)) { |
c48ffbcc | 2292 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_DH_KEY_TOO_SMALL); |
ada66e78 P |
2293 | goto err; |
2294 | } | |
2295 | ||
555cbb32 | 2296 | s->s3.peer_tmp = peer_tmp; |
1ee22dc2 | 2297 | peer_tmp = NULL; |
e01a610d MC |
2298 | |
2299 | /* | |
2300 | * FIXME: This makes assumptions about which ciphersuites come with | |
2301 | * public keys. We should have a less ad-hoc way of doing this | |
2302 | */ | |
555cbb32 | 2303 | if (s->s3.tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS)) |
3c95ef22 | 2304 | *pkey = tls_get_peer_pkey(s); |
e01a610d MC |
2305 | /* else anonymous DH, so no certificate or pkey. */ |
2306 | ||
1ee22dc2 | 2307 | ret = 1; |
e01a610d MC |
2308 | |
2309 | err: | |
1ee22dc2 | 2310 | OSSL_PARAM_BLD_free(tmpl); |
3f883c7c | 2311 | OSSL_PARAM_free(params); |
1ee22dc2 MC |
2312 | EVP_PKEY_free(peer_tmp); |
2313 | EVP_PKEY_CTX_free(pctx); | |
e01a610d MC |
2314 | BN_free(p); |
2315 | BN_free(g); | |
2316 | BN_free(bnpub_key); | |
e01a610d | 2317 | |
1ee22dc2 | 2318 | return ret; |
e01a610d MC |
2319 | } |
2320 | ||
38b051a1 | 2321 | static int tls_process_ske_ecdhe(SSL_CONNECTION *s, PACKET *pkt, EVP_PKEY **pkey) |
ff74aeb1 | 2322 | { |
ff74aeb1 | 2323 | PACKET encoded_pt; |
6447e818 | 2324 | unsigned int curve_type, curve_id; |
ff74aeb1 MC |
2325 | |
2326 | /* | |
2327 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
6447e818 | 2328 | * public key. We only support named (not generic) curves and |
ff74aeb1 MC |
2329 | * ECParameters in this case is just three bytes. |
2330 | */ | |
6447e818 | 2331 | if (!PACKET_get_1(pkt, &curve_type) || !PACKET_get_net_2(pkt, &curve_id)) { |
c48ffbcc | 2332 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_TOO_SHORT); |
ff74aeb1 MC |
2333 | return 0; |
2334 | } | |
2335 | /* | |
6447e818 DSH |
2336 | * Check curve is named curve type and one of our preferences, if not |
2337 | * server has sent an invalid curve. | |
ff74aeb1 | 2338 | */ |
dcf8b01f MC |
2339 | if (curve_type != NAMED_CURVE_TYPE |
2340 | || !tls1_check_group_id(s, curve_id, 1)) { | |
c48ffbcc | 2341 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CURVE); |
ff74aeb1 MC |
2342 | return 0; |
2343 | } | |
2344 | ||
ada66e78 | 2345 | if ((s->s3.peer_tmp = ssl_generate_param_group(s, curve_id)) == NULL) { |
c48ffbcc | 2346 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
a2c2e000 | 2347 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
ff74aeb1 MC |
2348 | return 0; |
2349 | } | |
2350 | ||
ff74aeb1 | 2351 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) { |
c48ffbcc | 2352 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
ff74aeb1 MC |
2353 | return 0; |
2354 | } | |
2355 | ||
5ac8fb58 MC |
2356 | if (EVP_PKEY_set1_encoded_public_key(s->s3.peer_tmp, |
2357 | PACKET_data(&encoded_pt), | |
2358 | PACKET_remaining(&encoded_pt)) <= 0) { | |
c48ffbcc | 2359 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_ECPOINT); |
ff74aeb1 MC |
2360 | return 0; |
2361 | } | |
2362 | ||
2363 | /* | |
2364 | * The ECC/TLS specification does not mention the use of DSA to sign | |
2365 | * ECParameters in the server key exchange message. We do support RSA | |
2366 | * and ECDSA. | |
2367 | */ | |
555cbb32 | 2368 | if (s->s3.tmp.new_cipher->algorithm_auth & SSL_aECDSA) |
3c95ef22 | 2369 | *pkey = tls_get_peer_pkey(s); |
555cbb32 | 2370 | else if (s->s3.tmp.new_cipher->algorithm_auth & SSL_aRSA) |
3c95ef22 | 2371 | *pkey = tls_get_peer_pkey(s); |
ff74aeb1 MC |
2372 | /* else anonymous ECDH, so no certificate or pkey. */ |
2373 | ||
aa6bd216 BK |
2374 | /* Cache the agreed upon group in the SSL_SESSION */ |
2375 | s->session->kex_group = curve_id; | |
ff74aeb1 | 2376 | return 1; |
ff74aeb1 MC |
2377 | } |
2378 | ||
38b051a1 | 2379 | MSG_PROCESS_RETURN tls_process_key_exchange(SSL_CONNECTION *s, PACKET *pkt) |
b9908bf9 | 2380 | { |
e1e588ac | 2381 | long alg_k; |
b9908bf9 | 2382 | EVP_PKEY *pkey = NULL; |
fe3066ee MC |
2383 | EVP_MD_CTX *md_ctx = NULL; |
2384 | EVP_PKEY_CTX *pctx = NULL; | |
73999b62 | 2385 | PACKET save_param_start, signature; |
38b051a1 | 2386 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
b9908bf9 | 2387 | |
555cbb32 | 2388 | alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
b9908bf9 | 2389 | |
73999b62 | 2390 | save_param_start = *pkt; |
8d92c1f8 | 2391 | |
555cbb32 TS |
2392 | EVP_PKEY_free(s->s3.peer_tmp); |
2393 | s->s3.peer_tmp = NULL; | |
d02b48c6 | 2394 | |
7689082b | 2395 | if (alg_k & SSL_PSK) { |
a2c2e000 MC |
2396 | if (!tls_process_ske_psk_preamble(s, pkt)) { |
2397 | /* SSLfatal() already called */ | |
7dc1c647 | 2398 | goto err; |
a2c2e000 | 2399 | } |
7689082b DSH |
2400 | } |
2401 | ||
2402 | /* Nothing else to do for plain PSK or RSAPSK */ | |
2403 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
25c6c10c | 2404 | } else if (alg_k & SSL_kSRP) { |
a2c2e000 MC |
2405 | if (!tls_process_ske_srp(s, pkt, &pkey)) { |
2406 | /* SSLfatal() already called */ | |
0f113f3e | 2407 | goto err; |
a2c2e000 | 2408 | } |
e01a610d | 2409 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
a2c2e000 MC |
2410 | if (!tls_process_ske_dhe(s, pkt, &pkey)) { |
2411 | /* SSLfatal() already called */ | |
e01a610d | 2412 | goto err; |
a2c2e000 | 2413 | } |
ff74aeb1 | 2414 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
a2c2e000 MC |
2415 | if (!tls_process_ske_ecdhe(s, pkt, &pkey)) { |
2416 | /* SSLfatal() already called */ | |
ff74aeb1 | 2417 | goto err; |
a2c2e000 | 2418 | } |
0f113f3e | 2419 | } else if (alg_k) { |
c48ffbcc | 2420 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_R_UNEXPECTED_MESSAGE); |
e1e588ac | 2421 | goto err; |
0f113f3e | 2422 | } |
0f113f3e | 2423 | |
0f113f3e MC |
2424 | /* if it was signed, check the signature */ |
2425 | if (pkey != NULL) { | |
32942870 | 2426 | PACKET params; |
be8dba2c | 2427 | const EVP_MD *md = NULL; |
72ceb6a6 DSH |
2428 | unsigned char *tbs; |
2429 | size_t tbslen; | |
2430 | int rv; | |
e1e588ac | 2431 | |
32942870 EK |
2432 | /* |
2433 | * |pkt| now points to the beginning of the signature, so the difference | |
2434 | * equals the length of the parameters. | |
2435 | */ | |
2436 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms, | |
2437 | PACKET_remaining(&save_param_start) - | |
73999b62 | 2438 | PACKET_remaining(pkt))) { |
c48ffbcc | 2439 | SSLfatal(s, SSL_AD_DECODE_ERROR, ERR_R_INTERNAL_ERROR); |
e1e588ac | 2440 | goto err; |
32942870 EK |
2441 | } |
2442 | ||
0f113f3e | 2443 | if (SSL_USE_SIGALGS(s)) { |
703bcee0 | 2444 | unsigned int sigalg; |
703bcee0 MC |
2445 | |
2446 | if (!PACKET_get_net_2(pkt, &sigalg)) { | |
c48ffbcc | 2447 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_TOO_SHORT); |
e1e588ac | 2448 | goto err; |
0f113f3e | 2449 | } |
f63a17d6 MC |
2450 | if (tls12_check_peer_sigalg(s, sigalg, pkey) <=0) { |
2451 | /* SSLfatal() already called */ | |
0f113f3e | 2452 | goto err; |
0f113f3e | 2453 | } |
f365a3e2 | 2454 | } else if (!tls1_set_peer_legacy_sigalg(s, pkey)) { |
97b8db1a TM |
2455 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2456 | SSL_R_LEGACY_SIGALG_DISALLOWED_OR_UNSUPPORTED); | |
f365a3e2 | 2457 | goto err; |
32942870 | 2458 | } |
0f113f3e | 2459 | |
38b051a1 | 2460 | if (!tls1_lookup_md(sctx, s->s3.tmp.peer_sigalg, &md)) { |
c48ffbcc | 2461 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
7cd1420b | 2462 | SSL_R_NO_SUITABLE_DIGEST_ALGORITHM); |
b2021556 DSH |
2463 | goto err; |
2464 | } | |
44f23cd2 | 2465 | if (SSL_USE_SIGALGS(s)) |
49b26f54 | 2466 | OSSL_TRACE1(TLS, "USING TLSv1.2 HASH %s\n", |
ed576acd | 2467 | md == NULL ? "n/a" : EVP_MD_get0_name(md)); |
f365a3e2 | 2468 | |
73999b62 MC |
2469 | if (!PACKET_get_length_prefixed_2(pkt, &signature) |
2470 | || PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 2471 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
e1e588ac | 2472 | goto err; |
0f113f3e | 2473 | } |
e1e588ac MC |
2474 | |
2475 | md_ctx = EVP_MD_CTX_new(); | |
2476 | if (md_ctx == NULL) { | |
e077455e | 2477 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
e1e588ac | 2478 | goto err; |
0f113f3e | 2479 | } |
e1e588ac | 2480 | |
d8652be0 | 2481 | if (EVP_DigestVerifyInit_ex(md_ctx, &pctx, |
ed576acd | 2482 | md == NULL ? NULL : EVP_MD_get0_name(md), |
38b051a1 | 2483 | sctx->libctx, sctx->propq, pkey, |
d38b6ae9 | 2484 | NULL) <= 0) { |
c48ffbcc | 2485 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
fe3066ee MC |
2486 | goto err; |
2487 | } | |
5554facb | 2488 | if (SSL_USE_PSS(s)) { |
fe3066ee | 2489 | if (EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) <= 0 |
91410d40 | 2490 | || EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, |
968ae5b3 | 2491 | RSA_PSS_SALTLEN_DIGEST) <= 0) { |
c48ffbcc | 2492 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
fe3066ee MC |
2493 | goto err; |
2494 | } | |
2495 | } | |
72ceb6a6 DSH |
2496 | tbslen = construct_key_exchange_tbs(s, &tbs, PACKET_data(¶ms), |
2497 | PACKET_remaining(¶ms)); | |
2498 | if (tbslen == 0) { | |
f63a17d6 | 2499 | /* SSLfatal() already called */ |
e1e588ac | 2500 | goto err; |
192e4bbb | 2501 | } |
72ceb6a6 DSH |
2502 | |
2503 | rv = EVP_DigestVerify(md_ctx, PACKET_data(&signature), | |
2504 | PACKET_remaining(&signature), tbs, tbslen); | |
2505 | OPENSSL_free(tbs); | |
cfba0675 | 2506 | if (rv <= 0) { |
c48ffbcc | 2507 | SSLfatal(s, SSL_AD_DECRYPT_ERROR, SSL_R_BAD_SIGNATURE); |
e1e588ac | 2508 | goto err; |
0f113f3e | 2509 | } |
e1e588ac | 2510 | EVP_MD_CTX_free(md_ctx); |
fe3066ee | 2511 | md_ctx = NULL; |
0f113f3e | 2512 | } else { |
7689082b | 2513 | /* aNULL, aSRP or PSK do not need public keys */ |
555cbb32 | 2514 | if (!(s->s3.tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP)) |
a230b26e | 2515 | && !(alg_k & SSL_PSK)) { |
0f113f3e | 2516 | /* Might be wrong key type, check it */ |
e1e588ac | 2517 | if (ssl3_check_cert_and_algorithm(s)) { |
c48ffbcc | 2518 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_DATA); |
e1e588ac | 2519 | } |
a2c2e000 | 2520 | /* else this shouldn't happen, SSLfatal() already called */ |
0f113f3e MC |
2521 | goto err; |
2522 | } | |
2523 | /* still data left over */ | |
73999b62 | 2524 | if (PACKET_remaining(pkt) != 0) { |
c48ffbcc | 2525 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_EXTRA_DATA_IN_MESSAGE); |
e1e588ac | 2526 | goto err; |
0f113f3e MC |
2527 | } |
2528 | } | |
e1e588ac | 2529 | |
b9908bf9 | 2530 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2531 | err: |
fe3066ee | 2532 | EVP_MD_CTX_free(md_ctx); |
b9908bf9 | 2533 | return MSG_PROCESS_ERROR; |
0f113f3e | 2534 | } |
d02b48c6 | 2535 | |
38b051a1 TM |
2536 | MSG_PROCESS_RETURN tls_process_certificate_request(SSL_CONNECTION *s, |
2537 | PACKET *pkt) | |
b9908bf9 | 2538 | { |
32f66107 | 2539 | /* Clear certificate validity flags */ |
ee58915c MB |
2540 | if (s->s3.tmp.valid_flags != NULL) |
2541 | memset(s->s3.tmp.valid_flags, 0, s->ssl_pkey_num * sizeof(uint32_t)); | |
2542 | else | |
2543 | s->s3.tmp.valid_flags = OPENSSL_zalloc(s->ssl_pkey_num * sizeof(uint32_t)); | |
2544 | ||
2545 | /* Give up for good if allocation didn't work */ | |
2546 | if (s->s3.tmp.valid_flags == NULL) | |
2547 | return 0; | |
0f113f3e | 2548 | |
38b051a1 | 2549 | if (SSL_CONNECTION_IS_TLS13(s)) { |
32f66107 DSH |
2550 | PACKET reqctx, extensions; |
2551 | RAW_EXTENSION *rawexts = NULL; | |
03f44b97 | 2552 | |
1bf4cb0f MC |
2553 | if ((s->shutdown & SSL_SENT_SHUTDOWN) != 0) { |
2554 | /* | |
2555 | * We already sent close_notify. This can only happen in TLSv1.3 | |
2556 | * post-handshake messages. We can't reasonably respond to this, so | |
2557 | * we just ignore it | |
2558 | */ | |
2559 | return MSG_PROCESS_FINISHED_READING; | |
2560 | } | |
2561 | ||
03f44b97 | 2562 | /* Free and zero certificate types: it is not present in TLS 1.3 */ |
555cbb32 TS |
2563 | OPENSSL_free(s->s3.tmp.ctype); |
2564 | s->s3.tmp.ctype = NULL; | |
2565 | s->s3.tmp.ctype_len = 0; | |
9d75dce3 TS |
2566 | OPENSSL_free(s->pha_context); |
2567 | s->pha_context = NULL; | |
39a14059 | 2568 | s->pha_context_len = 0; |
32f66107 | 2569 | |
9d75dce3 TS |
2570 | if (!PACKET_get_length_prefixed_1(pkt, &reqctx) || |
2571 | !PACKET_memdup(&reqctx, &s->pha_context, &s->pha_context_len)) { | |
c48ffbcc | 2572 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2573 | return MSG_PROCESS_ERROR; |
03f44b97 | 2574 | } |
32f66107 DSH |
2575 | |
2576 | if (!PACKET_get_length_prefixed_2(pkt, &extensions)) { | |
c48ffbcc | 2577 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_LENGTH); |
f63a17d6 | 2578 | return MSG_PROCESS_ERROR; |
32f66107 DSH |
2579 | } |
2580 | if (!tls_collect_extensions(s, &extensions, | |
fe874d27 | 2581 | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, |
f63a17d6 | 2582 | &rawexts, NULL, 1) |
fe874d27 | 2583 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, |
f63a17d6 MC |
2584 | rawexts, NULL, 0, 1)) { |
2585 | /* SSLfatal() already called */ | |
32f66107 | 2586 | OPENSSL_free(rawexts); |
f63a17d6 | 2587 | return MSG_PROCESS_ERROR; |
32f66107 DSH |
2588 | } |
2589 | OPENSSL_free(rawexts); | |
2590 | if (!tls1_process_sigalgs(s)) { | |
c48ffbcc | 2591 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_LENGTH); |
f63a17d6 | 2592 | return MSG_PROCESS_ERROR; |
32f66107 | 2593 | } |
03f44b97 DSH |
2594 | } else { |
2595 | PACKET ctypes; | |
75c13e78 | 2596 | |
03f44b97 DSH |
2597 | /* get the certificate types */ |
2598 | if (!PACKET_get_length_prefixed_1(pkt, &ctypes)) { | |
c48ffbcc | 2599 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2600 | return MSG_PROCESS_ERROR; |
03f44b97 DSH |
2601 | } |
2602 | ||
555cbb32 | 2603 | if (!PACKET_memdup(&ctypes, &s->s3.tmp.ctype, &s->s3.tmp.ctype_len)) { |
c48ffbcc | 2604 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f63a17d6 | 2605 | return MSG_PROCESS_ERROR; |
03f44b97 | 2606 | } |
ac112332 | 2607 | |
32f66107 DSH |
2608 | if (SSL_USE_SIGALGS(s)) { |
2609 | PACKET sigalgs; | |
703bcee0 | 2610 | |
32f66107 | 2611 | if (!PACKET_get_length_prefixed_2(pkt, &sigalgs)) { |
c48ffbcc | 2612 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2613 | return MSG_PROCESS_ERROR; |
32f66107 | 2614 | } |
ac112332 | 2615 | |
c589c34e BK |
2616 | /* |
2617 | * Despite this being for certificates, preserve compatibility | |
2618 | * with pre-TLS 1.3 and use the regular sigalgs field. | |
2619 | */ | |
2620 | if (!tls1_save_sigalgs(s, &sigalgs, 0)) { | |
f63a17d6 | 2621 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
f63a17d6 MC |
2622 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); |
2623 | return MSG_PROCESS_ERROR; | |
32f66107 DSH |
2624 | } |
2625 | if (!tls1_process_sigalgs(s)) { | |
e077455e | 2626 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_SSL_LIB); |
f63a17d6 | 2627 | return MSG_PROCESS_ERROR; |
32f66107 | 2628 | } |
0f113f3e | 2629 | } |
0f113f3e | 2630 | |
32f66107 | 2631 | /* get the CA RDNs */ |
f63a17d6 MC |
2632 | if (!parse_ca_names(s, pkt)) { |
2633 | /* SSLfatal() already called */ | |
2634 | return MSG_PROCESS_ERROR; | |
2635 | } | |
03f44b97 DSH |
2636 | } |
2637 | ||
2638 | if (PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 2639 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2640 | return MSG_PROCESS_ERROR; |
03f44b97 | 2641 | } |
0f113f3e | 2642 | |
0f113f3e | 2643 | /* we should setup a certificate to return.... */ |
555cbb32 | 2644 | s->s3.tmp.cert_req = 1; |
0f113f3e | 2645 | |
e4562014 MC |
2646 | /* |
2647 | * In TLSv1.3 we don't prepare the client certificate yet. We wait until | |
2648 | * after the CertificateVerify message has been received. This is because | |
2649 | * in TLSv1.3 the CertificateRequest arrives before the Certificate message | |
2650 | * but in TLSv1.2 it is the other way around. We want to make sure that | |
8c2bfd25 | 2651 | * SSL_get1_peer_certificate() returns something sensible in |
e4562014 MC |
2652 | * client_cert_cb. |
2653 | */ | |
38b051a1 TM |
2654 | if (SSL_CONNECTION_IS_TLS13(s) |
2655 | && s->post_handshake_auth != SSL_PHA_REQUESTED) | |
e4562014 MC |
2656 | return MSG_PROCESS_CONTINUE_READING; |
2657 | ||
f63a17d6 | 2658 | return MSG_PROCESS_CONTINUE_PROCESSING; |
0f113f3e MC |
2659 | } |
2660 | ||
38b051a1 TM |
2661 | MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL_CONNECTION *s, |
2662 | PACKET *pkt) | |
b9908bf9 | 2663 | { |
b9908bf9 | 2664 | unsigned int ticklen; |
9ac6244b | 2665 | unsigned long ticket_lifetime_hint, age_add = 0; |
ec60ccc1 | 2666 | unsigned int sess_len; |
de1df7e9 | 2667 | RAW_EXTENSION *exts = NULL; |
9b6a8254 | 2668 | PACKET nonce; |
abd86cec | 2669 | EVP_MD *sha256 = NULL; |
38b051a1 | 2670 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
b9908bf9 | 2671 | |
6cf2dbd9 MC |
2672 | PACKET_null_init(&nonce); |
2673 | ||
73999b62 | 2674 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint) |
38b051a1 | 2675 | || (SSL_CONNECTION_IS_TLS13(s) |
9b6a8254 | 2676 | && (!PACKET_get_net_4(pkt, &age_add) |
6cf2dbd9 | 2677 | || !PACKET_get_length_prefixed_1(pkt, &nonce))) |
a230b26e | 2678 | || !PACKET_get_net_2(pkt, &ticklen) |
38b051a1 TM |
2679 | || (SSL_CONNECTION_IS_TLS13(s) ? (ticklen == 0 |
2680 | || PACKET_remaining(pkt) < ticklen) | |
2681 | : PACKET_remaining(pkt) != ticklen)) { | |
c48ffbcc | 2682 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2683 | goto err; |
e711da71 EK |
2684 | } |
2685 | ||
de1df7e9 MC |
2686 | /* |
2687 | * Server is allowed to change its mind (in <=TLSv1.2) and send an empty | |
2688 | * ticket. We already checked this TLSv1.3 case above, so it should never | |
2689 | * be 0 here in that instance | |
2690 | */ | |
e711da71 | 2691 | if (ticklen == 0) |
c9de4a20 | 2692 | return MSG_PROCESS_CONTINUE_READING; |
e711da71 | 2693 | |
150840b9 MC |
2694 | /* |
2695 | * Sessions must be immutable once they go into the session cache. Otherwise | |
2696 | * we can get multi-thread problems. Therefore we don't "update" sessions, | |
2697 | * we replace them with a duplicate. In TLSv1.3 we need to do this every | |
2698 | * time a NewSessionTicket arrives because those messages arrive | |
2699 | * post-handshake and the session may have already gone into the session | |
2700 | * cache. | |
2701 | */ | |
38b051a1 | 2702 | if (SSL_CONNECTION_IS_TLS13(s) || s->session->session_id_length > 0) { |
98ece4ee | 2703 | SSL_SESSION *new_sess; |
1f156321 | 2704 | |
98ece4ee MC |
2705 | /* |
2706 | * We reused an existing session, so we need to replace it with a new | |
2707 | * one | |
2708 | */ | |
5d61491c | 2709 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { |
e077455e | 2710 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_SSL_LIB); |
f63a17d6 | 2711 | goto err; |
5d61491c MC |
2712 | } |
2713 | ||
1f156321 | 2714 | if ((s->session_ctx->session_cache_mode & SSL_SESS_CACHE_CLIENT) != 0 |
38b051a1 | 2715 | && !SSL_CONNECTION_IS_TLS13(s)) { |
1f156321 MC |
2716 | /* |
2717 | * In TLSv1.2 and below the arrival of a new tickets signals that | |
2718 | * any old ticket we were using is now out of date, so we remove the | |
2719 | * old session from the cache. We carry on if this fails | |
2720 | */ | |
2721 | SSL_CTX_remove_session(s->session_ctx, s->session); | |
2722 | } | |
2723 | ||
98ece4ee MC |
2724 | SSL_SESSION_free(s->session); |
2725 | s->session = new_sess; | |
2726 | } | |
2727 | ||
f0131dc0 | 2728 | s->session->time = ossl_time_now(); |
25959e04 | 2729 | ssl_session_calculate_timeout(s->session); |
fc24f0bf | 2730 | |
aff8c126 RS |
2731 | OPENSSL_free(s->session->ext.tick); |
2732 | s->session->ext.tick = NULL; | |
2733 | s->session->ext.ticklen = 0; | |
e711da71 | 2734 | |
aff8c126 RS |
2735 | s->session->ext.tick = OPENSSL_malloc(ticklen); |
2736 | if (s->session->ext.tick == NULL) { | |
e077455e | 2737 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
0f113f3e MC |
2738 | goto err; |
2739 | } | |
aff8c126 | 2740 | if (!PACKET_copy_bytes(pkt, s->session->ext.tick, ticklen)) { |
c48ffbcc | 2741 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2742 | goto err; |
561e12bb | 2743 | } |
e711da71 | 2744 | |
aff8c126 | 2745 | s->session->ext.tick_lifetime_hint = ticket_lifetime_hint; |
fc24f0bf | 2746 | s->session->ext.tick_age_add = age_add; |
aff8c126 | 2747 | s->session->ext.ticklen = ticklen; |
de1df7e9 | 2748 | |
38b051a1 | 2749 | if (SSL_CONNECTION_IS_TLS13(s)) { |
de1df7e9 MC |
2750 | PACKET extpkt; |
2751 | ||
2752 | if (!PACKET_as_length_prefixed_2(pkt, &extpkt) | |
1cde0259 | 2753 | || PACKET_remaining(pkt) != 0) { |
c48ffbcc | 2754 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
1cde0259 MC |
2755 | goto err; |
2756 | } | |
2757 | ||
2758 | if (!tls_collect_extensions(s, &extpkt, | |
2759 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET, &exts, | |
2760 | NULL, 1) | |
fe874d27 MC |
2761 | || !tls_parse_all_extensions(s, |
2762 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET, | |
f63a17d6 MC |
2763 | exts, NULL, 0, 1)) { |
2764 | /* SSLfatal() already called */ | |
2765 | goto err; | |
de1df7e9 MC |
2766 | } |
2767 | } | |
2768 | ||
0f113f3e MC |
2769 | /* |
2770 | * There are two ways to detect a resumed ticket session. One is to set | |
2771 | * an appropriate session ID and then the server must return a match in | |
2772 | * ServerHello. This allows the normal client session ID matching to work | |
2773 | * and we know much earlier that the ticket has been accepted. The | |
2774 | * other way is to set zero length session ID when the ticket is | |
2775 | * presented and rely on the handshake to determine session resumption. | |
2776 | * We choose the former approach because this fits in with assumptions | |
abd86cec MC |
2777 | * elsewhere in OpenSSL. The session ID is set to the SHA256 hash of the |
2778 | * ticket. | |
0f113f3e | 2779 | */ |
38b051a1 | 2780 | sha256 = EVP_MD_fetch(sctx->libctx, "SHA2-256", sctx->propq); |
abd86cec | 2781 | if (sha256 == NULL) { |
5a2d0ef3 RL |
2782 | /* Error is already recorded */ |
2783 | SSLfatal_alert(s, SSL_AD_INTERNAL_ERROR); | |
abd86cec MC |
2784 | goto err; |
2785 | } | |
ec60ccc1 | 2786 | /* |
407820c0 | 2787 | * We use sess_len here because EVP_Digest expects an int |
ec60ccc1 MC |
2788 | * but s->session->session_id_length is a size_t |
2789 | */ | |
aff8c126 | 2790 | if (!EVP_Digest(s->session->ext.tick, ticklen, |
ec60ccc1 | 2791 | s->session->session_id, &sess_len, |
abd86cec | 2792 | sha256, NULL)) { |
c48ffbcc | 2793 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
d166ed8c DSH |
2794 | goto err; |
2795 | } | |
abd86cec MC |
2796 | EVP_MD_free(sha256); |
2797 | sha256 = NULL; | |
ec60ccc1 | 2798 | s->session->session_id_length = sess_len; |
4cb00457 | 2799 | s->session->not_resumable = 0; |
de1df7e9 MC |
2800 | |
2801 | /* This is a standalone message in TLSv1.3, so there is no more to read */ | |
38b051a1 | 2802 | if (SSL_CONNECTION_IS_TLS13(s)) { |
4ff1a526 | 2803 | const EVP_MD *md = ssl_handshake_md(s); |
ed576acd | 2804 | int hashleni = EVP_MD_get_size(md); |
4ff1a526 MC |
2805 | size_t hashlen; |
2806 | static const unsigned char nonce_label[] = "resumption"; | |
2807 | ||
2808 | /* Ensure cast to size_t is safe */ | |
2809 | if (!ossl_assert(hashleni >= 0)) { | |
c48ffbcc | 2810 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
4ff1a526 MC |
2811 | goto err; |
2812 | } | |
2813 | hashlen = (size_t)hashleni; | |
2814 | ||
2815 | if (!tls13_hkdf_expand(s, md, s->resumption_master_secret, | |
2816 | nonce_label, | |
2817 | sizeof(nonce_label) - 1, | |
6cf2dbd9 MC |
2818 | PACKET_data(&nonce), |
2819 | PACKET_remaining(&nonce), | |
4ff1a526 | 2820 | s->session->master_key, |
0fb2815b | 2821 | hashlen, 1)) { |
4ff1a526 MC |
2822 | /* SSLfatal() already called */ |
2823 | goto err; | |
2824 | } | |
2825 | s->session->master_key_length = hashlen; | |
2826 | ||
33d93417 | 2827 | OPENSSL_free(exts); |
de1df7e9 MC |
2828 | ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); |
2829 | return MSG_PROCESS_FINISHED_READING; | |
2830 | } | |
2831 | ||
b9908bf9 | 2832 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2833 | err: |
abd86cec | 2834 | EVP_MD_free(sha256); |
33d93417 | 2835 | OPENSSL_free(exts); |
b9908bf9 | 2836 | return MSG_PROCESS_ERROR; |
0f113f3e | 2837 | } |
67c8e7f4 | 2838 | |
f63e4288 MC |
2839 | /* |
2840 | * In TLSv1.3 this is called from the extensions code, otherwise it is used to | |
f63a17d6 | 2841 | * parse a separate message. Returns 1 on success or 0 on failure |
f63e4288 | 2842 | */ |
38b051a1 | 2843 | int tls_process_cert_status_body(SSL_CONNECTION *s, PACKET *pkt) |
b9908bf9 | 2844 | { |
8b0e934a | 2845 | size_t resplen; |
b9908bf9 | 2846 | unsigned int type; |
b9908bf9 | 2847 | |
73999b62 | 2848 | if (!PACKET_get_1(pkt, &type) |
a230b26e | 2849 | || type != TLSEXT_STATUSTYPE_ocsp) { |
c48ffbcc | 2850 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_UNSUPPORTED_STATUS_TYPE); |
f63e4288 | 2851 | return 0; |
0f113f3e | 2852 | } |
56a26ce3 MC |
2853 | if (!PACKET_get_net_3_len(pkt, &resplen) |
2854 | || PACKET_remaining(pkt) != resplen) { | |
c48ffbcc | 2855 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63e4288 | 2856 | return 0; |
0f113f3e | 2857 | } |
8cbfcc70 RS |
2858 | s->ext.ocsp.resp = OPENSSL_malloc(resplen); |
2859 | if (s->ext.ocsp.resp == NULL) { | |
39a14059 | 2860 | s->ext.ocsp.resp_len = 0; |
e077455e | 2861 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
f63e4288 | 2862 | return 0; |
0f113f3e | 2863 | } |
39a14059 | 2864 | s->ext.ocsp.resp_len = resplen; |
8cbfcc70 | 2865 | if (!PACKET_copy_bytes(pkt, s->ext.ocsp.resp, resplen)) { |
c48ffbcc | 2866 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63e4288 | 2867 | return 0; |
ac63710a | 2868 | } |
f63e4288 MC |
2869 | |
2870 | return 1; | |
2871 | } | |
2faa1b48 | 2872 | |
f63e4288 | 2873 | |
38b051a1 | 2874 | MSG_PROCESS_RETURN tls_process_cert_status(SSL_CONNECTION *s, PACKET *pkt) |
f63e4288 | 2875 | { |
f63a17d6 MC |
2876 | if (!tls_process_cert_status_body(s, pkt)) { |
2877 | /* SSLfatal() already called */ | |
f63e4288 MC |
2878 | return MSG_PROCESS_ERROR; |
2879 | } | |
2880 | ||
b9908bf9 | 2881 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 2882 | } |
d02b48c6 | 2883 | |
7776a36c MC |
2884 | /* |
2885 | * Perform miscellaneous checks and processing after we have received the | |
2886 | * server's initial flight. In TLS1.3 this is after the Server Finished message. | |
6530c490 MC |
2887 | * In <=TLS1.2 this is after the ServerDone message. Returns 1 on success or 0 |
2888 | * on failure. | |
7776a36c | 2889 | */ |
38b051a1 | 2890 | int tls_process_initial_server_flight(SSL_CONNECTION *s) |
b9908bf9 | 2891 | { |
38b051a1 TM |
2892 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
2893 | ||
a455d0f6 MC |
2894 | /* |
2895 | * at this point we check that we have the required stuff from | |
2896 | * the server | |
2897 | */ | |
2898 | if (!ssl3_check_cert_and_algorithm(s)) { | |
f63a17d6 | 2899 | /* SSLfatal() already called */ |
7776a36c | 2900 | return 0; |
a455d0f6 MC |
2901 | } |
2902 | ||
bb1aaab4 | 2903 | /* |
aff8c126 RS |
2904 | * Call the ocsp status callback if needed. The |ext.ocsp.resp| and |
2905 | * |ext.ocsp.resp_len| values will be set if we actually received a status | |
bb1aaab4 MC |
2906 | * message, or NULL and -1 otherwise |
2907 | */ | |
aff8c126 | 2908 | if (s->ext.status_type != TLSEXT_STATUSTYPE_nothing |
38b051a1 TM |
2909 | && sctx->ext.status_cb != NULL) { |
2910 | int ret = sctx->ext.status_cb(SSL_CONNECTION_GET_SSL(s), | |
2911 | sctx->ext.status_arg); | |
aff8c126 | 2912 | |
bb1aaab4 | 2913 | if (ret == 0) { |
f63a17d6 | 2914 | SSLfatal(s, SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE, |
f63a17d6 | 2915 | SSL_R_INVALID_STATUS_RESPONSE); |
7776a36c | 2916 | return 0; |
bb1aaab4 MC |
2917 | } |
2918 | if (ret < 0) { | |
c0f4400c DB |
2919 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2920 | SSL_R_OCSP_CALLBACK_FAILURE); | |
7776a36c | 2921 | return 0; |
bb1aaab4 MC |
2922 | } |
2923 | } | |
ed29e82a RP |
2924 | #ifndef OPENSSL_NO_CT |
2925 | if (s->ct_validation_callback != NULL) { | |
43341433 VD |
2926 | /* Note we validate the SCTs whether or not we abort on error */ |
2927 | if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) { | |
f63a17d6 | 2928 | /* SSLfatal() already called */ |
7776a36c | 2929 | return 0; |
ed29e82a RP |
2930 | } |
2931 | } | |
2932 | #endif | |
2933 | ||
7776a36c MC |
2934 | return 1; |
2935 | } | |
2936 | ||
38b051a1 | 2937 | MSG_PROCESS_RETURN tls_process_server_done(SSL_CONNECTION *s, PACKET *pkt) |
7776a36c | 2938 | { |
7776a36c MC |
2939 | if (PACKET_remaining(pkt) > 0) { |
2940 | /* should contain no data */ | |
c48ffbcc | 2941 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
f63a17d6 | 2942 | return MSG_PROCESS_ERROR; |
7776a36c MC |
2943 | } |
2944 | #ifndef OPENSSL_NO_SRP | |
555cbb32 | 2945 | if (s->s3.tmp.new_cipher->algorithm_mkey & SSL_kSRP) { |
76cb077f | 2946 | if (ssl_srp_calc_a_param_intern(s) <= 0) { |
c48ffbcc | 2947 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_SRP_A_CALC); |
f63a17d6 | 2948 | return MSG_PROCESS_ERROR; |
7776a36c MC |
2949 | } |
2950 | } | |
2951 | #endif | |
2952 | ||
f63a17d6 MC |
2953 | if (!tls_process_initial_server_flight(s)) { |
2954 | /* SSLfatal() already called */ | |
2955 | return MSG_PROCESS_ERROR; | |
2956 | } | |
7776a36c | 2957 | |
bd79bcb4 | 2958 | return MSG_PROCESS_FINISHED_READING; |
0f113f3e | 2959 | } |
176f31dd | 2960 | |
38b051a1 | 2961 | static int tls_construct_cke_psk_preamble(SSL_CONNECTION *s, WPACKET *pkt) |
0f113f3e | 2962 | { |
7689082b | 2963 | #ifndef OPENSSL_NO_PSK |
13c0ec4a MC |
2964 | int ret = 0; |
2965 | /* | |
2966 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
2967 | * \0-terminated identity. The last byte is for us for simulating | |
2968 | * strnlen. | |
2969 | */ | |
2970 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
2971 | size_t identitylen = 0; | |
2972 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
2973 | unsigned char *tmppsk = NULL; | |
2974 | char *tmpidentity = NULL; | |
2975 | size_t psklen = 0; | |
2976 | ||
2977 | if (s->psk_client_callback == NULL) { | |
c48ffbcc | 2978 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_PSK_NO_CLIENT_CB); |
13c0ec4a MC |
2979 | goto err; |
2980 | } | |
d02b48c6 | 2981 | |
13c0ec4a | 2982 | memset(identity, 0, sizeof(identity)); |
d02b48c6 | 2983 | |
38b051a1 TM |
2984 | psklen = s->psk_client_callback(SSL_CONNECTION_GET_SSL(s), |
2985 | s->session->psk_identity_hint, | |
13c0ec4a MC |
2986 | identity, sizeof(identity) - 1, |
2987 | psk, sizeof(psk)); | |
7689082b | 2988 | |
13c0ec4a | 2989 | if (psklen > PSK_MAX_PSK_LEN) { |
c48ffbcc | 2990 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, ERR_R_INTERNAL_ERROR); |
3de7f014 | 2991 | psklen = PSK_MAX_PSK_LEN; /* Avoid overrunning the array on cleanse */ |
13c0ec4a MC |
2992 | goto err; |
2993 | } else if (psklen == 0) { | |
c48ffbcc | 2994 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_PSK_IDENTITY_NOT_FOUND); |
13c0ec4a MC |
2995 | goto err; |
2996 | } | |
7689082b | 2997 | |
13c0ec4a MC |
2998 | identitylen = strlen(identity); |
2999 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
c48ffbcc | 3000 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
3001 | goto err; |
3002 | } | |
7689082b | 3003 | |
13c0ec4a MC |
3004 | tmppsk = OPENSSL_memdup(psk, psklen); |
3005 | tmpidentity = OPENSSL_strdup(identity); | |
3006 | if (tmppsk == NULL || tmpidentity == NULL) { | |
e077455e | 3007 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
13c0ec4a MC |
3008 | goto err; |
3009 | } | |
7689082b | 3010 | |
555cbb32 TS |
3011 | OPENSSL_free(s->s3.tmp.psk); |
3012 | s->s3.tmp.psk = tmppsk; | |
3013 | s->s3.tmp.psklen = psklen; | |
13c0ec4a MC |
3014 | tmppsk = NULL; |
3015 | OPENSSL_free(s->session->psk_identity); | |
3016 | s->session->psk_identity = tmpidentity; | |
3017 | tmpidentity = NULL; | |
f1ec23c0 | 3018 | |
b2b3024e | 3019 | if (!WPACKET_sub_memcpy_u16(pkt, identity, identitylen)) { |
c48ffbcc | 3020 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 MC |
3021 | goto err; |
3022 | } | |
7689082b | 3023 | |
13c0ec4a | 3024 | ret = 1; |
0bce0b02 | 3025 | |
13c0ec4a MC |
3026 | err: |
3027 | OPENSSL_cleanse(psk, psklen); | |
3028 | OPENSSL_cleanse(identity, sizeof(identity)); | |
3029 | OPENSSL_clear_free(tmppsk, psklen); | |
3030 | OPENSSL_clear_free(tmpidentity, identitylen); | |
d02b48c6 | 3031 | |
13c0ec4a MC |
3032 | return ret; |
3033 | #else | |
c48ffbcc | 3034 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
13c0ec4a | 3035 | return 0; |
b9908bf9 | 3036 | #endif |
13c0ec4a | 3037 | } |
b9908bf9 | 3038 | |
38b051a1 | 3039 | static int tls_construct_cke_rsa(SSL_CONNECTION *s, WPACKET *pkt) |
13c0ec4a | 3040 | { |
f1ec23c0 | 3041 | unsigned char *encdata = NULL; |
13c0ec4a MC |
3042 | EVP_PKEY *pkey = NULL; |
3043 | EVP_PKEY_CTX *pctx = NULL; | |
3044 | size_t enclen; | |
3045 | unsigned char *pms = NULL; | |
3046 | size_t pmslen = 0; | |
38b051a1 | 3047 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
b9908bf9 | 3048 | |
3c95ef22 | 3049 | if (!received_server_cert(s)) { |
13c0ec4a MC |
3050 | /* |
3051 | * We should always have a server certificate with SSL_kRSA. | |
3052 | */ | |
c48ffbcc | 3053 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
3054 | return 0; |
3055 | } | |
0f113f3e | 3056 | |
3c95ef22 TS |
3057 | if ((pkey = tls_get_peer_pkey(s)) == NULL) { |
3058 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
3059 | return 0; | |
3060 | } | |
3061 | ||
d7e498ac | 3062 | if (!EVP_PKEY_is_a(pkey, "RSA")) { |
c48ffbcc | 3063 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
13c0ec4a MC |
3064 | return 0; |
3065 | } | |
0f113f3e | 3066 | |
13c0ec4a MC |
3067 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; |
3068 | pms = OPENSSL_malloc(pmslen); | |
3069 | if (pms == NULL) { | |
e077455e | 3070 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
13c0ec4a MC |
3071 | return 0; |
3072 | } | |
0bce0b02 | 3073 | |
13c0ec4a MC |
3074 | pms[0] = s->client_version >> 8; |
3075 | pms[1] = s->client_version & 0xff; | |
38b051a1 | 3076 | if (RAND_bytes_ex(sctx->libctx, pms + 2, pmslen - 2, 0) <= 0) { |
e077455e | 3077 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_RAND_LIB); |
13c0ec4a MC |
3078 | goto err; |
3079 | } | |
0f113f3e | 3080 | |
13c0ec4a | 3081 | /* Fix buf for TLS and beyond */ |
f1ec23c0 | 3082 | if (s->version > SSL3_VERSION && !WPACKET_start_sub_packet_u16(pkt)) { |
c48ffbcc | 3083 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 MC |
3084 | goto err; |
3085 | } | |
3aceb9ec | 3086 | |
38b051a1 | 3087 | pctx = EVP_PKEY_CTX_new_from_pkey(sctx->libctx, pkey, sctx->propq); |
13c0ec4a MC |
3088 | if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0 |
3089 | || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) { | |
c48ffbcc | 3090 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
13c0ec4a MC |
3091 | goto err; |
3092 | } | |
f1ec23c0 MC |
3093 | if (!WPACKET_allocate_bytes(pkt, enclen, &encdata) |
3094 | || EVP_PKEY_encrypt(pctx, encdata, &enclen, pms, pmslen) <= 0) { | |
c48ffbcc | 3095 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_RSA_ENCRYPT); |
13c0ec4a MC |
3096 | goto err; |
3097 | } | |
13c0ec4a MC |
3098 | EVP_PKEY_CTX_free(pctx); |
3099 | pctx = NULL; | |
0f113f3e | 3100 | |
13c0ec4a | 3101 | /* Fix buf for TLS and beyond */ |
f1ec23c0 | 3102 | if (s->version > SSL3_VERSION && !WPACKET_close(pkt)) { |
c48ffbcc | 3103 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 | 3104 | goto err; |
b9908bf9 | 3105 | } |
13c0ec4a | 3106 | |
2faa1b48 | 3107 | /* Log the premaster secret, if logging is enabled. */ |
a2c2e000 MC |
3108 | if (!ssl_log_rsa_client_key_exchange(s, encdata, enclen, pms, pmslen)) { |
3109 | /* SSLfatal() already called */ | |
2faa1b48 | 3110 | goto err; |
a2c2e000 | 3111 | } |
2faa1b48 | 3112 | |
555cbb32 TS |
3113 | s->s3.tmp.pms = pms; |
3114 | s->s3.tmp.pmslen = pmslen; | |
26fb4b03 | 3115 | |
13c0ec4a MC |
3116 | return 1; |
3117 | err: | |
3118 | OPENSSL_clear_free(pms, pmslen); | |
3119 | EVP_PKEY_CTX_free(pctx); | |
3120 | ||
3121 | return 0; | |
13c0ec4a MC |
3122 | } |
3123 | ||
38b051a1 | 3124 | static int tls_construct_cke_dhe(SSL_CONNECTION *s, WPACKET *pkt) |
a8c1c704 | 3125 | { |
a8c1c704 | 3126 | EVP_PKEY *ckey = NULL, *skey = NULL; |
f1ec23c0 | 3127 | unsigned char *keybytes = NULL; |
807b0a1d | 3128 | int prime_len; |
cb5a427a MC |
3129 | unsigned char *encoded_pub = NULL; |
3130 | size_t encoded_pub_len, pad_len; | |
3131 | int ret = 0; | |
a8c1c704 | 3132 | |
555cbb32 | 3133 | skey = s->s3.peer_tmp; |
a2c2e000 | 3134 | if (skey == NULL) { |
c48ffbcc | 3135 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 | 3136 | goto err; |
a2c2e000 | 3137 | } |
f1ec23c0 | 3138 | |
0f00ed77 | 3139 | ckey = ssl_generate_pkey(s, skey); |
a2c2e000 | 3140 | if (ckey == NULL) { |
c48ffbcc | 3141 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b599ce3b | 3142 | goto err; |
a2c2e000 | 3143 | } |
b599ce3b | 3144 | |
a2c2e000 MC |
3145 | if (ssl_derive(s, ckey, skey, 0) == 0) { |
3146 | /* SSLfatal() already called */ | |
f1ec23c0 | 3147 | goto err; |
a2c2e000 | 3148 | } |
a8c1c704 MC |
3149 | |
3150 | /* send off the data */ | |
cb5a427a MC |
3151 | |
3152 | /* Generate encoding of server key */ | |
3153 | encoded_pub_len = EVP_PKEY_get1_encoded_public_key(ckey, &encoded_pub); | |
3154 | if (encoded_pub_len == 0) { | |
3155 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
10481d33 | 3156 | EVP_PKEY_free(ckey); |
cb5a427a MC |
3157 | return EXT_RETURN_FAIL; |
3158 | } | |
3159 | ||
807b0a1d FM |
3160 | /* |
3161 | * For interoperability with some versions of the Microsoft TLS | |
3162 | * stack, we need to zero pad the DHE pub key to the same length | |
cb5a427a | 3163 | * as the prime. |
807b0a1d | 3164 | */ |
ed576acd | 3165 | prime_len = EVP_PKEY_get_size(ckey); |
cb5a427a MC |
3166 | pad_len = prime_len - encoded_pub_len; |
3167 | if (pad_len > 0) { | |
3168 | if (!WPACKET_sub_allocate_bytes_u16(pkt, pad_len, &keybytes)) { | |
3169 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
3170 | goto err; | |
3171 | } | |
3172 | memset(keybytes, 0, pad_len); | |
3173 | } | |
3174 | ||
3175 | if (!WPACKET_sub_memcpy_u16(pkt, encoded_pub, encoded_pub_len)) { | |
c48ffbcc | 3176 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 | 3177 | goto err; |
a2c2e000 | 3178 | } |
f1ec23c0 | 3179 | |
cb5a427a | 3180 | ret = 1; |
f1ec23c0 | 3181 | err: |
cb5a427a | 3182 | OPENSSL_free(encoded_pub); |
f1ec23c0 | 3183 | EVP_PKEY_free(ckey); |
cb5a427a | 3184 | return ret; |
a8c1c704 MC |
3185 | } |
3186 | ||
38b051a1 | 3187 | static int tls_construct_cke_ecdhe(SSL_CONNECTION *s, WPACKET *pkt) |
67ad5aab | 3188 | { |
67ad5aab | 3189 | unsigned char *encodedPoint = NULL; |
348240c6 | 3190 | size_t encoded_pt_len = 0; |
67ad5aab | 3191 | EVP_PKEY *ckey = NULL, *skey = NULL; |
f1ec23c0 | 3192 | int ret = 0; |
67ad5aab | 3193 | |
555cbb32 | 3194 | skey = s->s3.peer_tmp; |
ec24630a | 3195 | if (skey == NULL) { |
c48ffbcc | 3196 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ad5aab MC |
3197 | return 0; |
3198 | } | |
3199 | ||
0f00ed77 | 3200 | ckey = ssl_generate_pkey(s, skey); |
b599ce3b | 3201 | if (ckey == NULL) { |
e077455e | 3202 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_SSL_LIB); |
b599ce3b MC |
3203 | goto err; |
3204 | } | |
67ad5aab | 3205 | |
0f1e51ea | 3206 | if (ssl_derive(s, ckey, skey, 0) == 0) { |
a2c2e000 | 3207 | /* SSLfatal() already called */ |
67ad5aab MC |
3208 | goto err; |
3209 | } | |
3210 | ||
3211 | /* Generate encoding of client key */ | |
5ac8fb58 | 3212 | encoded_pt_len = EVP_PKEY_get1_encoded_public_key(ckey, &encodedPoint); |
67ad5aab MC |
3213 | |
3214 | if (encoded_pt_len == 0) { | |
c48ffbcc | 3215 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EC_LIB); |
67ad5aab MC |
3216 | goto err; |
3217 | } | |
3218 | ||
b2b3024e | 3219 | if (!WPACKET_sub_memcpy_u8(pkt, encodedPoint, encoded_pt_len)) { |
c48ffbcc | 3220 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 MC |
3221 | goto err; |
3222 | } | |
67ad5aab | 3223 | |
f1ec23c0 | 3224 | ret = 1; |
67ad5aab | 3225 | err: |
f1ec23c0 | 3226 | OPENSSL_free(encodedPoint); |
67ad5aab | 3227 | EVP_PKEY_free(ckey); |
f1ec23c0 | 3228 | return ret; |
67ad5aab MC |
3229 | } |
3230 | ||
38b051a1 | 3231 | static int tls_construct_cke_gost(SSL_CONNECTION *s, WPACKET *pkt) |
e00e0b3d MC |
3232 | { |
3233 | #ifndef OPENSSL_NO_GOST | |
3234 | /* GOST key exchange message creation */ | |
3235 | EVP_PKEY_CTX *pkey_ctx = NULL; | |
3c95ef22 | 3236 | EVP_PKEY *pkey = NULL; |
e00e0b3d MC |
3237 | size_t msglen; |
3238 | unsigned int md_len; | |
3239 | unsigned char shared_ukm[32], tmp[256]; | |
3240 | EVP_MD_CTX *ukm_hash = NULL; | |
3241 | int dgst_nid = NID_id_GostR3411_94; | |
3242 | unsigned char *pms = NULL; | |
3243 | size_t pmslen = 0; | |
38b051a1 | 3244 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
e00e0b3d | 3245 | |
555cbb32 | 3246 | if ((s->s3.tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0) |
e00e0b3d MC |
3247 | dgst_nid = NID_id_GostR3411_2012_256; |
3248 | ||
3249 | /* | |
1ee4b98e | 3250 | * Get server certificate PKEY and create ctx from it |
e00e0b3d | 3251 | */ |
3c95ef22 | 3252 | if ((pkey = tls_get_peer_pkey(s)) == NULL) { |
c48ffbcc RL |
3253 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
3254 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); | |
e00e0b3d MC |
3255 | return 0; |
3256 | } | |
3257 | ||
38b051a1 | 3258 | pkey_ctx = EVP_PKEY_CTX_new_from_pkey(sctx->libctx, |
3c95ef22 | 3259 | pkey, |
38b051a1 | 3260 | sctx->propq); |
e00e0b3d | 3261 | if (pkey_ctx == NULL) { |
e077455e | 3262 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
e00e0b3d MC |
3263 | return 0; |
3264 | } | |
3265 | /* | |
3266 | * If we have send a certificate, and certificate key | |
3267 | * parameters match those of server certificate, use | |
3268 | * certificate key for key exchange | |
3269 | */ | |
3270 | ||
3271 | /* Otherwise, generate ephemeral key pair */ | |
3272 | pmslen = 32; | |
3273 | pms = OPENSSL_malloc(pmslen); | |
3274 | if (pms == NULL) { | |
e077455e | 3275 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
2f3930bc | 3276 | goto err; |
e00e0b3d MC |
3277 | } |
3278 | ||
3279 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0 | |
348240c6 | 3280 | /* Generate session key |
348240c6 | 3281 | */ |
38b051a1 | 3282 | || RAND_bytes_ex(sctx->libctx, pms, pmslen, 0) <= 0) { |
c48ffbcc | 3283 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
3284 | goto err; |
3285 | }; | |
e00e0b3d MC |
3286 | /* |
3287 | * Compute shared IV and store it in algorithm-specific context | |
3288 | * data | |
3289 | */ | |
3290 | ukm_hash = EVP_MD_CTX_new(); | |
3291 | if (ukm_hash == NULL | |
a230b26e | 3292 | || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0 |
555cbb32 | 3293 | || EVP_DigestUpdate(ukm_hash, s->s3.client_random, |
a230b26e | 3294 | SSL3_RANDOM_SIZE) <= 0 |
555cbb32 | 3295 | || EVP_DigestUpdate(ukm_hash, s->s3.server_random, |
a230b26e EK |
3296 | SSL3_RANDOM_SIZE) <= 0 |
3297 | || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) { | |
c48ffbcc | 3298 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
3299 | goto err; |
3300 | } | |
3301 | EVP_MD_CTX_free(ukm_hash); | |
3302 | ukm_hash = NULL; | |
3303 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
7b1264ba | 3304 | EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) <= 0) { |
c48ffbcc | 3305 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
3306 | goto err; |
3307 | } | |
3308 | /* Make GOST keytransport blob message */ | |
3309 | /* | |
3310 | * Encapsulate it into sequence | |
3311 | */ | |
e00e0b3d MC |
3312 | msglen = 255; |
3313 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) { | |
c48ffbcc | 3314 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_LIBRARY_BUG); |
e00e0b3d MC |
3315 | goto err; |
3316 | } | |
f1ec23c0 | 3317 | |
08029dfa MC |
3318 | if (!WPACKET_put_bytes_u8(pkt, V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED) |
3319 | || (msglen >= 0x80 && !WPACKET_put_bytes_u8(pkt, 0x81)) | |
b2b3024e | 3320 | || !WPACKET_sub_memcpy_u8(pkt, tmp, msglen)) { |
c48ffbcc | 3321 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f1ec23c0 | 3322 | goto err; |
e00e0b3d | 3323 | } |
f1ec23c0 | 3324 | |
e00e0b3d | 3325 | EVP_PKEY_CTX_free(pkey_ctx); |
555cbb32 TS |
3326 | s->s3.tmp.pms = pms; |
3327 | s->s3.tmp.pmslen = pmslen; | |
e00e0b3d MC |
3328 | |
3329 | return 1; | |
3330 | err: | |
3331 | EVP_PKEY_CTX_free(pkey_ctx); | |
3332 | OPENSSL_clear_free(pms, pmslen); | |
3333 | EVP_MD_CTX_free(ukm_hash); | |
3334 | return 0; | |
3335 | #else | |
c48ffbcc | 3336 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
e00e0b3d MC |
3337 | return 0; |
3338 | #endif | |
3339 | } | |
3340 | ||
5a5530a2 | 3341 | #ifndef OPENSSL_NO_GOST |
38b051a1 | 3342 | int ossl_gost18_cke_cipher_nid(const SSL_CONNECTION *s) |
5a5530a2 DB |
3343 | { |
3344 | if ((s->s3.tmp.new_cipher->algorithm_enc & SSL_MAGMA) != 0) | |
3345 | return NID_magma_ctr; | |
3346 | else if ((s->s3.tmp.new_cipher->algorithm_enc & SSL_KUZNYECHIK) != 0) | |
3347 | return NID_kuznyechik_ctr; | |
3348 | ||
3349 | return NID_undef; | |
3350 | } | |
3351 | ||
38b051a1 | 3352 | int ossl_gost_ukm(const SSL_CONNECTION *s, unsigned char *dgst_buf) |
5a5530a2 DB |
3353 | { |
3354 | EVP_MD_CTX * hash = NULL; | |
3355 | unsigned int md_len; | |
38b051a1 TM |
3356 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
3357 | const EVP_MD *md = ssl_evp_md_fetch(sctx->libctx, NID_id_GostR3411_2012_256, | |
3358 | sctx->propq); | |
5a5530a2 DB |
3359 | |
3360 | if (md == NULL) | |
3361 | return 0; | |
3362 | ||
3363 | if ((hash = EVP_MD_CTX_new()) == NULL | |
3364 | || EVP_DigestInit(hash, md) <= 0 | |
3365 | || EVP_DigestUpdate(hash, s->s3.client_random, SSL3_RANDOM_SIZE) <= 0 | |
3366 | || EVP_DigestUpdate(hash, s->s3.server_random, SSL3_RANDOM_SIZE) <= 0 | |
3367 | || EVP_DigestFinal_ex(hash, dgst_buf, &md_len) <= 0) { | |
3368 | EVP_MD_CTX_free(hash); | |
3369 | ssl_evp_md_free(md); | |
3370 | return 0; | |
3371 | } | |
3372 | ||
3373 | EVP_MD_CTX_free(hash); | |
3374 | ssl_evp_md_free(md); | |
3375 | return 1; | |
3376 | } | |
3377 | #endif | |
3378 | ||
38b051a1 | 3379 | static int tls_construct_cke_gost18(SSL_CONNECTION *s, WPACKET *pkt) |
5a5530a2 DB |
3380 | { |
3381 | #ifndef OPENSSL_NO_GOST | |
3382 | /* GOST 2018 key exchange message creation */ | |
2b5e8999 DB |
3383 | unsigned char rnd_dgst[32]; |
3384 | unsigned char *encdata = NULL; | |
5a5530a2 | 3385 | EVP_PKEY_CTX *pkey_ctx = NULL; |
3c95ef22 | 3386 | EVP_PKEY *pkey; |
5a5530a2 DB |
3387 | unsigned char *pms = NULL; |
3388 | size_t pmslen = 0; | |
3389 | size_t msglen; | |
6dd4b77a | 3390 | int cipher_nid = ossl_gost18_cke_cipher_nid(s); |
38b051a1 | 3391 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
5a5530a2 DB |
3392 | |
3393 | if (cipher_nid == NID_undef) { | |
c48ffbcc | 3394 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
5a5530a2 DB |
3395 | return 0; |
3396 | } | |
3397 | ||
6dd4b77a | 3398 | if (ossl_gost_ukm(s, rnd_dgst) <= 0) { |
c48ffbcc | 3399 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
5a5530a2 DB |
3400 | goto err; |
3401 | } | |
3402 | ||
3403 | /* Pre-master secret - random bytes */ | |
3404 | pmslen = 32; | |
3405 | pms = OPENSSL_malloc(pmslen); | |
3406 | if (pms == NULL) { | |
e077455e | 3407 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
5a5530a2 DB |
3408 | goto err; |
3409 | } | |
3410 | ||
38b051a1 | 3411 | if (RAND_bytes_ex(sctx->libctx, pms, pmslen, 0) <= 0) { |
c48ffbcc | 3412 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
5a5530a2 DB |
3413 | goto err; |
3414 | } | |
3415 | ||
3416 | /* Get server certificate PKEY and create ctx from it */ | |
3c95ef22 | 3417 | if ((pkey = tls_get_peer_pkey(s)) == NULL) { |
c48ffbcc RL |
3418 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
3419 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); | |
1b87116a | 3420 | goto err; |
5a5530a2 DB |
3421 | } |
3422 | ||
38b051a1 | 3423 | pkey_ctx = EVP_PKEY_CTX_new_from_pkey(sctx->libctx, |
3c95ef22 | 3424 | pkey, |
38b051a1 | 3425 | sctx->propq); |
5a5530a2 | 3426 | if (pkey_ctx == NULL) { |
e077455e | 3427 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
1b87116a | 3428 | goto err; |
5a5530a2 DB |
3429 | } |
3430 | ||
1287dabd | 3431 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0) { |
c48ffbcc | 3432 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
5a5530a2 DB |
3433 | goto err; |
3434 | }; | |
3435 | ||
3436 | /* Reuse EVP_PKEY_CTRL_SET_IV, make choice in engine code */ | |
3437 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
7b1264ba | 3438 | EVP_PKEY_CTRL_SET_IV, 32, rnd_dgst) <= 0) { |
c48ffbcc | 3439 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_LIBRARY_BUG); |
5a5530a2 DB |
3440 | goto err; |
3441 | } | |
3442 | ||
3443 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, | |
7b1264ba | 3444 | EVP_PKEY_CTRL_CIPHER, cipher_nid, NULL) <= 0) { |
c48ffbcc | 3445 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_LIBRARY_BUG); |
5a5530a2 DB |
3446 | goto err; |
3447 | } | |
3448 | ||
2b5e8999 DB |
3449 | if (EVP_PKEY_encrypt(pkey_ctx, NULL, &msglen, pms, pmslen) <= 0) { |
3450 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); | |
5a5530a2 DB |
3451 | goto err; |
3452 | } | |
3453 | ||
2b5e8999 DB |
3454 | if (!WPACKET_allocate_bytes(pkt, msglen, &encdata) |
3455 | || EVP_PKEY_encrypt(pkey_ctx, encdata, &msglen, pms, pmslen) <= 0) { | |
3456 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); | |
5a5530a2 DB |
3457 | goto err; |
3458 | } | |
3459 | ||
3460 | EVP_PKEY_CTX_free(pkey_ctx); | |
2b5e8999 | 3461 | pkey_ctx = NULL; |
5a5530a2 DB |
3462 | s->s3.tmp.pms = pms; |
3463 | s->s3.tmp.pmslen = pmslen; | |
3464 | ||
3465 | return 1; | |
3466 | err: | |
3467 | EVP_PKEY_CTX_free(pkey_ctx); | |
3468 | OPENSSL_clear_free(pms, pmslen); | |
3469 | return 0; | |
3470 | #else | |
c48ffbcc | 3471 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
5a5530a2 DB |
3472 | return 0; |
3473 | #endif | |
3474 | } | |
3475 | ||
38b051a1 | 3476 | static int tls_construct_cke_srp(SSL_CONNECTION *s, WPACKET *pkt) |
840a2bf8 | 3477 | { |
8b9546c7 | 3478 | #ifndef OPENSSL_NO_SRP |
f1ec23c0 MC |
3479 | unsigned char *abytes = NULL; |
3480 | ||
3481 | if (s->srp_ctx.A == NULL | |
b2b3024e MC |
3482 | || !WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(s->srp_ctx.A), |
3483 | &abytes)) { | |
c48ffbcc | 3484 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
3485 | return 0; |
3486 | } | |
f1ec23c0 MC |
3487 | BN_bn2bin(s->srp_ctx.A, abytes); |
3488 | ||
840a2bf8 MC |
3489 | OPENSSL_free(s->session->srp_username); |
3490 | s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login); | |
3491 | if (s->session->srp_username == NULL) { | |
e077455e | 3492 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
840a2bf8 MC |
3493 | return 0; |
3494 | } | |
3495 | ||
3496 | return 1; | |
3497 | #else | |
c48ffbcc | 3498 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
840a2bf8 MC |
3499 | return 0; |
3500 | #endif | |
3501 | } | |
3502 | ||
67ec6d2b MC |
3503 | CON_FUNC_RETURN tls_construct_client_key_exchange(SSL_CONNECTION *s, |
3504 | WPACKET *pkt) | |
13c0ec4a | 3505 | { |
13c0ec4a | 3506 | unsigned long alg_k; |
13c0ec4a | 3507 | |
555cbb32 | 3508 | alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
13c0ec4a | 3509 | |
a2c2e000 MC |
3510 | /* |
3511 | * All of the construct functions below call SSLfatal() if necessary so | |
3512 | * no need to do so here. | |
3513 | */ | |
13c0ec4a | 3514 | if ((alg_k & SSL_PSK) |
a2c2e000 | 3515 | && !tls_construct_cke_psk_preamble(s, pkt)) |
13c0ec4a MC |
3516 | goto err; |
3517 | ||
f1ec23c0 | 3518 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
a2c2e000 | 3519 | if (!tls_construct_cke_rsa(s, pkt)) |
13c0ec4a | 3520 | goto err; |
a8c1c704 | 3521 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
a2c2e000 | 3522 | if (!tls_construct_cke_dhe(s, pkt)) |
b9908bf9 | 3523 | goto err; |
67ad5aab | 3524 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
a2c2e000 | 3525 | if (!tls_construct_cke_ecdhe(s, pkt)) |
ce0c1f2b | 3526 | goto err; |
e00e0b3d | 3527 | } else if (alg_k & SSL_kGOST) { |
a2c2e000 | 3528 | if (!tls_construct_cke_gost(s, pkt)) |
a71edf3b | 3529 | goto err; |
5a5530a2 DB |
3530 | } else if (alg_k & SSL_kGOST18) { |
3531 | if (!tls_construct_cke_gost18(s, pkt)) | |
3532 | goto err; | |
840a2bf8 | 3533 | } else if (alg_k & SSL_kSRP) { |
a2c2e000 | 3534 | if (!tls_construct_cke_srp(s, pkt)) |
69f68237 | 3535 | goto err; |
4a424545 | 3536 | } else if (!(alg_k & SSL_kPSK)) { |
c48ffbcc | 3537 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b9908bf9 MC |
3538 | goto err; |
3539 | } | |
3540 | ||
67ec6d2b | 3541 | return CON_FUNC_SUCCESS; |
0f113f3e | 3542 | err: |
555cbb32 TS |
3543 | OPENSSL_clear_free(s->s3.tmp.pms, s->s3.tmp.pmslen); |
3544 | s->s3.tmp.pms = NULL; | |
39a14059 | 3545 | s->s3.tmp.pmslen = 0; |
7689082b | 3546 | #ifndef OPENSSL_NO_PSK |
555cbb32 TS |
3547 | OPENSSL_clear_free(s->s3.tmp.psk, s->s3.tmp.psklen); |
3548 | s->s3.tmp.psk = NULL; | |
39a14059 | 3549 | s->s3.tmp.psklen = 0; |
0f113f3e | 3550 | #endif |
67ec6d2b | 3551 | return CON_FUNC_ERROR; |
b9908bf9 MC |
3552 | } |
3553 | ||
38b051a1 | 3554 | int tls_client_key_exchange_post_work(SSL_CONNECTION *s) |
b9908bf9 MC |
3555 | { |
3556 | unsigned char *pms = NULL; | |
3557 | size_t pmslen = 0; | |
3558 | ||
555cbb32 TS |
3559 | pms = s->s3.tmp.pms; |
3560 | pmslen = s->s3.tmp.pmslen; | |
6f137370 | 3561 | |
b9908bf9 MC |
3562 | #ifndef OPENSSL_NO_SRP |
3563 | /* Check for SRP */ | |
555cbb32 | 3564 | if (s->s3.tmp.new_cipher->algorithm_mkey & SSL_kSRP) { |
b9908bf9 | 3565 | if (!srp_generate_client_master_secret(s)) { |
a2c2e000 | 3566 | /* SSLfatal() already called */ |
b9908bf9 MC |
3567 | goto err; |
3568 | } | |
3569 | return 1; | |
3570 | } | |
3571 | #endif | |
b9908bf9 | 3572 | |
555cbb32 | 3573 | if (pms == NULL && !(s->s3.tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { |
e077455e | 3574 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_PASSED_INVALID_ARGUMENT); |
b9908bf9 MC |
3575 | goto err; |
3576 | } | |
3577 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { | |
a2c2e000 | 3578 | /* SSLfatal() already called */ |
6f137370 MC |
3579 | /* ssl_generate_master_secret frees the pms even on error */ |
3580 | pms = NULL; | |
3581 | pmslen = 0; | |
b9908bf9 MC |
3582 | goto err; |
3583 | } | |
6f137370 MC |
3584 | pms = NULL; |
3585 | pmslen = 0; | |
473483d4 MC |
3586 | |
3587 | #ifndef OPENSSL_NO_SCTP | |
38b051a1 | 3588 | if (SSL_CONNECTION_IS_DTLS(s)) { |
473483d4 MC |
3589 | unsigned char sctpauthkey[64]; |
3590 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
09d62b33 | 3591 | size_t labellen; |
38b051a1 | 3592 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
473483d4 MC |
3593 | |
3594 | /* | |
3595 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP | |
3596 | * used. | |
3597 | */ | |
141eb8c6 MC |
3598 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
3599 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
473483d4 | 3600 | |
09d62b33 MT |
3601 | /* Don't include the terminating zero. */ |
3602 | labellen = sizeof(labelbuffer) - 1; | |
3603 | if (s->mode & SSL_MODE_DTLS_SCTP_LABEL_LENGTH_BUG) | |
3604 | labellen += 1; | |
3605 | ||
38b051a1 | 3606 | if (SSL_export_keying_material(ssl, sctpauthkey, |
a230b26e | 3607 | sizeof(sctpauthkey), labelbuffer, |
09d62b33 | 3608 | labellen, NULL, 0, 0) <= 0) { |
c48ffbcc | 3609 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
473483d4 | 3610 | goto err; |
a2c2e000 | 3611 | } |
473483d4 | 3612 | |
38b051a1 | 3613 | BIO_ctrl(SSL_get_wbio(ssl), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, |
473483d4 MC |
3614 | sizeof(sctpauthkey), sctpauthkey); |
3615 | } | |
3616 | #endif | |
3617 | ||
b9908bf9 MC |
3618 | return 1; |
3619 | err: | |
3620 | OPENSSL_clear_free(pms, pmslen); | |
555cbb32 | 3621 | s->s3.tmp.pms = NULL; |
39a14059 | 3622 | s->s3.tmp.pmslen = 0; |
b9908bf9 | 3623 | return 0; |
0f113f3e | 3624 | } |
d02b48c6 | 3625 | |
0f113f3e MC |
3626 | /* |
3627 | * Check a certificate can be used for client authentication. Currently check | |
3628 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
3629 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 | 3630 | */ |
38b051a1 | 3631 | static int ssl3_check_client_certificate(SSL_CONNECTION *s) |
0f113f3e | 3632 | { |
0f113f3e | 3633 | /* If no suitable signature algorithm can't use certificate */ |
555cbb32 | 3634 | if (!tls_choose_sigalg(s, 0) || s->s3.tmp.sigalg == NULL) |
0f113f3e MC |
3635 | return 0; |
3636 | /* | |
3637 | * If strict mode check suitability of chain before using it. This also | |
3638 | * adjusts suite B digest if necessary. | |
3639 | */ | |
3640 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
3641 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
3642 | return 0; | |
0f113f3e MC |
3643 | return 1; |
3644 | } | |
0d609395 | 3645 | |
38b051a1 | 3646 | WORK_STATE tls_prepare_client_certificate(SSL_CONNECTION *s, WORK_STATE wst) |
0f113f3e MC |
3647 | { |
3648 | X509 *x509 = NULL; | |
3649 | EVP_PKEY *pkey = NULL; | |
3650 | int i; | |
38b051a1 | 3651 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
0f113f3e | 3652 | |
b9908bf9 | 3653 | if (wst == WORK_MORE_A) { |
0f113f3e MC |
3654 | /* Let cert callback update client certificates if required */ |
3655 | if (s->cert->cert_cb) { | |
38b051a1 | 3656 | i = s->cert->cert_cb(ssl, s->cert->cert_cb_arg); |
0f113f3e MC |
3657 | if (i < 0) { |
3658 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3659 | return WORK_MORE_A; |
0f113f3e MC |
3660 | } |
3661 | if (i == 0) { | |
c48ffbcc | 3662 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_CALLBACK_FAILED); |
eb5fd03b | 3663 | return WORK_ERROR; |
0f113f3e MC |
3664 | } |
3665 | s->rwstate = SSL_NOTHING; | |
3666 | } | |
9d75dce3 TS |
3667 | if (ssl3_check_client_certificate(s)) { |
3668 | if (s->post_handshake_auth == SSL_PHA_REQUESTED) { | |
3669 | return WORK_FINISHED_STOP; | |
3670 | } | |
b9908bf9 | 3671 | return WORK_FINISHED_CONTINUE; |
9d75dce3 | 3672 | } |
b9908bf9 MC |
3673 | |
3674 | /* Fall through to WORK_MORE_B */ | |
3675 | wst = WORK_MORE_B; | |
0f113f3e MC |
3676 | } |
3677 | ||
3678 | /* We need to get a client cert */ | |
b9908bf9 | 3679 | if (wst == WORK_MORE_B) { |
0f113f3e MC |
3680 | /* |
3681 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
3682 | * return(-1); We then get retied later | |
3683 | */ | |
0f113f3e MC |
3684 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
3685 | if (i < 0) { | |
3686 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3687 | return WORK_MORE_B; |
0f113f3e MC |
3688 | } |
3689 | s->rwstate = SSL_NOTHING; | |
3690 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
38b051a1 TM |
3691 | if (!SSL_use_certificate(ssl, x509) |
3692 | || !SSL_use_PrivateKey(ssl, pkey)) | |
0f113f3e MC |
3693 | i = 0; |
3694 | } else if (i == 1) { | |
3695 | i = 0; | |
6849b73c | 3696 | ERR_raise(ERR_LIB_SSL, SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
0f113f3e MC |
3697 | } |
3698 | ||
222561fe | 3699 | X509_free(x509); |
25aaa98a | 3700 | EVP_PKEY_free(pkey); |
0f113f3e MC |
3701 | if (i && !ssl3_check_client_certificate(s)) |
3702 | i = 0; | |
3703 | if (i == 0) { | |
3704 | if (s->version == SSL3_VERSION) { | |
555cbb32 | 3705 | s->s3.tmp.cert_req = 0; |
0f113f3e | 3706 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); |
b9908bf9 | 3707 | return WORK_FINISHED_CONTINUE; |
0f113f3e | 3708 | } else { |
555cbb32 | 3709 | s->s3.tmp.cert_req = 2; |
b67cb09f | 3710 | s->ext.compress_certificate_from_peer[0] = TLSEXT_comp_cert_none; |
124037fd | 3711 | if (!ssl3_digest_cached_records(s, 0)) { |
f63a17d6 | 3712 | /* SSLfatal() already called */ |
eb5fd03b | 3713 | return WORK_ERROR; |
dab18ab5 | 3714 | } |
0f113f3e MC |
3715 | } |
3716 | } | |
3717 | ||
b67cb09f TS |
3718 | if (!SSL_CONNECTION_IS_TLS13(s) |
3719 | || (s->options & SSL_OP_NO_TX_CERTIFICATE_COMPRESSION) != 0) | |
3720 | s->ext.compress_certificate_from_peer[0] = TLSEXT_comp_cert_none; | |
3721 | ||
9d75dce3 TS |
3722 | if (s->post_handshake_auth == SSL_PHA_REQUESTED) |
3723 | return WORK_FINISHED_STOP; | |
b9908bf9 | 3724 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3725 | } |
3726 | ||
b9908bf9 | 3727 | /* Shouldn't ever get here */ |
c48ffbcc | 3728 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b9908bf9 MC |
3729 | return WORK_ERROR; |
3730 | } | |
3731 | ||
67ec6d2b MC |
3732 | CON_FUNC_RETURN tls_construct_client_certificate(SSL_CONNECTION *s, |
3733 | WPACKET *pkt) | |
b9908bf9 | 3734 | { |
3c95ef22 | 3735 | CERT_PKEY *cpk = NULL; |
38b051a1 TM |
3736 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
3737 | ||
3738 | if (SSL_CONNECTION_IS_TLS13(s)) { | |
9d75dce3 TS |
3739 | if (s->pha_context == NULL) { |
3740 | /* no context available, add 0-length context */ | |
3741 | if (!WPACKET_put_bytes_u8(pkt, 0)) { | |
c48ffbcc | 3742 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 3743 | return CON_FUNC_ERROR; |
9d75dce3 TS |
3744 | } |
3745 | } else if (!WPACKET_sub_memcpy_u8(pkt, s->pha_context, s->pha_context_len)) { | |
c48ffbcc | 3746 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 3747 | return CON_FUNC_ERROR; |
9d75dce3 | 3748 | } |
f63a17d6 | 3749 | } |
3c95ef22 TS |
3750 | if (s->s3.tmp.cert_req != 2) |
3751 | cpk = s->cert->key; | |
3752 | switch (s->ext.client_cert_type) { | |
3753 | case TLSEXT_cert_type_rpk: | |
3754 | if (!tls_output_rpk(s, pkt, cpk)) { | |
3755 | /* SSLfatal() already called */ | |
3756 | return CON_FUNC_ERROR; | |
3757 | } | |
3758 | break; | |
3759 | case TLSEXT_cert_type_x509: | |
3760 | if (!ssl3_output_cert_chain(s, pkt, cpk, 0)) { | |
3761 | /* SSLfatal() already called */ | |
3762 | return CON_FUNC_ERROR; | |
3763 | } | |
3764 | break; | |
3765 | default: | |
3766 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
67ec6d2b | 3767 | return CON_FUNC_ERROR; |
f7e393be MC |
3768 | } |
3769 | ||
38b051a1 | 3770 | if (SSL_CONNECTION_IS_TLS13(s) |
f7e393be | 3771 | && SSL_IS_FIRST_HANDSHAKE(s) |
38b051a1 | 3772 | && (!ssl->method->ssl3_enc->change_cipher_state(s, |
f7e393be | 3773 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE))) { |
c31ad0bb | 3774 | /* |
a2c2e000 | 3775 | * This is a fatal error, which leaves enc_write_ctx in an inconsistent |
f63a17d6 | 3776 | * state and thus ssl3_send_alert may crash. |
c31ad0bb | 3777 | */ |
c48ffbcc | 3778 | SSLfatal(s, SSL_AD_NO_ALERT, SSL_R_CANNOT_CHANGE_CIPHER); |
67ec6d2b | 3779 | return CON_FUNC_ERROR; |
0f113f3e | 3780 | } |
b9908bf9 | 3781 | |
67ec6d2b | 3782 | return CON_FUNC_SUCCESS; |
0f113f3e MC |
3783 | } |
3784 | ||
b67cb09f TS |
3785 | #ifndef OPENSSL_NO_COMP_ALG |
3786 | CON_FUNC_RETURN tls_construct_client_compressed_certificate(SSL_CONNECTION *sc, | |
3787 | WPACKET *pkt) | |
3788 | { | |
3789 | SSL *ssl = SSL_CONNECTION_GET_SSL(sc); | |
3790 | WPACKET tmppkt; | |
3791 | BUF_MEM *buf = NULL; | |
3792 | size_t length; | |
3793 | size_t max_length; | |
3794 | COMP_METHOD *method; | |
3795 | COMP_CTX *comp = NULL; | |
3796 | int comp_len; | |
3797 | int ret = 0; | |
3798 | int alg = sc->ext.compress_certificate_from_peer[0]; | |
3799 | ||
3800 | /* Note that sc->s3.tmp.cert_req == 2 is checked in write transition */ | |
3801 | ||
3802 | if ((buf = BUF_MEM_new()) == NULL || !WPACKET_init(&tmppkt, buf)) | |
3803 | goto err; | |
3804 | ||
3805 | /* Use the |tmppkt| for the to-be-compressed data */ | |
3806 | if (sc->pha_context == NULL) { | |
3807 | /* no context available, add 0-length context */ | |
3808 | if (!WPACKET_put_bytes_u8(&tmppkt, 0)) | |
3809 | goto err; | |
3810 | } else if (!WPACKET_sub_memcpy_u8(&tmppkt, sc->pha_context, sc->pha_context_len)) | |
3811 | goto err; | |
3812 | ||
72620ac7 | 3813 | if (!ssl3_output_cert_chain(sc, &tmppkt, sc->cert->key, 0)) { |
b67cb09f TS |
3814 | /* SSLfatal() already called */ |
3815 | goto out; | |
3816 | } | |
3817 | ||
3818 | /* continue with the real |pkt| */ | |
3819 | if (!WPACKET_put_bytes_u16(pkt, alg) | |
3820 | || !WPACKET_get_total_written(&tmppkt, &length) | |
3821 | || !WPACKET_put_bytes_u24(pkt, length)) | |
3822 | goto err; | |
3823 | ||
3824 | switch (alg) { | |
3825 | case TLSEXT_comp_cert_zlib: | |
3840271e | 3826 | method = COMP_zlib_oneshot(); |
b67cb09f TS |
3827 | break; |
3828 | case TLSEXT_comp_cert_brotli: | |
3829 | method = COMP_brotli_oneshot(); | |
3830 | break; | |
3831 | case TLSEXT_comp_cert_zstd: | |
3832 | method = COMP_zstd_oneshot(); | |
3833 | break; | |
3834 | default: | |
3835 | goto err; | |
3836 | } | |
3837 | max_length = ossl_calculate_comp_expansion(alg, length); | |
3838 | ||
7e3cacac TS |
3839 | if ((comp = COMP_CTX_new(method)) == NULL |
3840 | || !WPACKET_start_sub_packet_u24(pkt) | |
3841 | || !WPACKET_reserve_bytes(pkt, max_length, NULL)) | |
b67cb09f TS |
3842 | goto err; |
3843 | ||
3844 | comp_len = COMP_compress_block(comp, WPACKET_get_curr(pkt), max_length, | |
3845 | (unsigned char *)buf->data, length); | |
3846 | if (comp_len <= 0) | |
3847 | goto err; | |
3848 | ||
3849 | if (!WPACKET_allocate_bytes(pkt, comp_len, NULL) | |
3850 | || !WPACKET_close(pkt)) | |
3851 | goto err; | |
3852 | ||
3853 | if (SSL_IS_FIRST_HANDSHAKE(sc) | |
3854 | && (!ssl->method->ssl3_enc->change_cipher_state(sc, | |
3855 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE))) { | |
3856 | /* | |
3857 | * This is a fatal error, which leaves sc->enc_write_ctx in an | |
3858 | * inconsistent state and thus ssl3_send_alert may crash. | |
3859 | */ | |
3860 | SSLfatal(sc, SSL_AD_NO_ALERT, SSL_R_CANNOT_CHANGE_CIPHER); | |
3861 | goto out; | |
3862 | } | |
3863 | ret = 1; | |
3864 | goto out; | |
3865 | ||
3866 | err: | |
3867 | SSLfatal(sc, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
3868 | out: | |
d06d5d6b TS |
3869 | if (buf != NULL) { |
3870 | /* If |buf| is NULL, then |tmppkt| could not have been initialized */ | |
3871 | WPACKET_cleanup(&tmppkt); | |
3872 | } | |
b67cb09f TS |
3873 | BUF_MEM_free(buf); |
3874 | COMP_CTX_free(comp); | |
3875 | return ret; | |
3876 | } | |
3877 | #endif | |
3878 | ||
38b051a1 | 3879 | int ssl3_check_cert_and_algorithm(SSL_CONNECTION *s) |
0f113f3e | 3880 | { |
dd24857b DSH |
3881 | const SSL_CERT_LOOKUP *clu; |
3882 | size_t idx; | |
0f113f3e | 3883 | long alg_k, alg_a; |
3c95ef22 | 3884 | EVP_PKEY *pkey; |
d02b48c6 | 3885 | |
555cbb32 TS |
3886 | alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
3887 | alg_a = s->s3.tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 3888 | |
0f113f3e | 3889 | /* we don't have a certificate */ |
dd24857b DSH |
3890 | if (!(alg_a & SSL_aCERT)) |
3891 | return 1; | |
d02b48c6 | 3892 | |
0f113f3e | 3893 | /* This is the passed certificate */ |
3c95ef22 TS |
3894 | pkey = tls_get_peer_pkey(s); |
3895 | clu = ssl_cert_lookup_by_pkey(pkey, &idx, SSL_CONNECTION_GET_CTX(s)); | |
d02b48c6 | 3896 | |
dd24857b DSH |
3897 | /* Check certificate is recognised and suitable for cipher */ |
3898 | if (clu == NULL || (alg_a & clu->amask) == 0) { | |
c48ffbcc | 3899 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_MISSING_SIGNING_CERT); |
f63a17d6 | 3900 | return 0; |
0f113f3e | 3901 | } |
0f113f3e | 3902 | |
dd24857b | 3903 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK) && idx != SSL_PKEY_RSA) { |
f63a17d6 | 3904 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
f63a17d6 MC |
3905 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); |
3906 | return 0; | |
0f113f3e | 3907 | } |
5b64ce89 | 3908 | |
555cbb32 | 3909 | if ((alg_k & SSL_kDHE) && (s->s3.peer_tmp == NULL)) { |
c48ffbcc | 3910 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f63a17d6 | 3911 | return 0; |
0f113f3e | 3912 | } |
d02b48c6 | 3913 | |
3c95ef22 TS |
3914 | /* Early out to skip the checks below */ |
3915 | if (s->session->peer_rpk != NULL) | |
3916 | return 1; | |
3917 | ||
3918 | if (clu->amask & SSL_aECDSA) { | |
3919 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s)) | |
3920 | return 1; | |
3921 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_BAD_ECC_CERT); | |
3922 | return 0; | |
3923 | } | |
3924 | ||
dd24857b | 3925 | return 1; |
0f113f3e MC |
3926 | } |
3927 | ||
e481f9b9 | 3928 | #ifndef OPENSSL_NO_NEXTPROTONEG |
67ec6d2b | 3929 | CON_FUNC_RETURN tls_construct_next_proto(SSL_CONNECTION *s, WPACKET *pkt) |
b9908bf9 | 3930 | { |
15e6be6c MC |
3931 | size_t len, padding_len; |
3932 | unsigned char *padding = NULL; | |
15e6be6c | 3933 | |
aff8c126 | 3934 | len = s->ext.npn_len; |
b9908bf9 | 3935 | padding_len = 32 - ((len + 2) % 32); |
15e6be6c | 3936 | |
aff8c126 | 3937 | if (!WPACKET_sub_memcpy_u8(pkt, s->ext.npn, len) |
7cea05dc | 3938 | || !WPACKET_sub_allocate_bytes_u8(pkt, padding_len, &padding)) { |
c48ffbcc | 3939 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
67ec6d2b | 3940 | return CON_FUNC_ERROR; |
15e6be6c MC |
3941 | } |
3942 | ||
3943 | memset(padding, 0, padding_len); | |
3944 | ||
67ec6d2b | 3945 | return CON_FUNC_SUCCESS; |
b9908bf9 | 3946 | } |
6434abbf | 3947 | #endif |
368888bc | 3948 | |
38b051a1 | 3949 | MSG_PROCESS_RETURN tls_process_hello_req(SSL_CONNECTION *s, PACKET *pkt) |
c7f47786 | 3950 | { |
38b051a1 TM |
3951 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
3952 | ||
c7f47786 MC |
3953 | if (PACKET_remaining(pkt) > 0) { |
3954 | /* should contain no data */ | |
c48ffbcc | 3955 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
c7f47786 MC |
3956 | return MSG_PROCESS_ERROR; |
3957 | } | |
3958 | ||
db0f35dd TS |
3959 | if ((s->options & SSL_OP_NO_RENEGOTIATION)) { |
3960 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_RENEGOTIATION); | |
3961 | return MSG_PROCESS_FINISHED_READING; | |
3962 | } | |
3963 | ||
c7f47786 | 3964 | /* |
1f04f23e MC |
3965 | * This is a historical discrepancy (not in the RFC) maintained for |
3966 | * compatibility reasons. If a TLS client receives a HelloRequest it will | |
3967 | * attempt an abbreviated handshake. However if a DTLS client receives a | |
3968 | * HelloRequest it will do a full handshake. Either behaviour is reasonable | |
3969 | * but doing one for TLS and another for DTLS is odd. | |
c7f47786 | 3970 | */ |
38b051a1 TM |
3971 | if (SSL_CONNECTION_IS_DTLS(s)) |
3972 | SSL_renegotiate(ssl); | |
c7f47786 | 3973 | else |
38b051a1 | 3974 | SSL_renegotiate_abbreviated(ssl); |
c7f47786 MC |
3975 | |
3976 | return MSG_PROCESS_FINISHED_READING; | |
3977 | } | |
3978 | ||
38b051a1 TM |
3979 | static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL_CONNECTION *s, |
3980 | PACKET *pkt) | |
e46f2334 | 3981 | { |
e46f2334 | 3982 | PACKET extensions; |
3434f40b | 3983 | RAW_EXTENSION *rawexts = NULL; |
e46f2334 | 3984 | |
26b9172a MC |
3985 | if (!PACKET_as_length_prefixed_2(pkt, &extensions) |
3986 | || PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 3987 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
e46f2334 MC |
3988 | goto err; |
3989 | } | |
3990 | ||
fe874d27 MC |
3991 | if (!tls_collect_extensions(s, &extensions, |
3992 | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, &rawexts, | |
f63a17d6 | 3993 | NULL, 1) |
fe874d27 | 3994 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, |
f63a17d6 MC |
3995 | rawexts, NULL, 0, 1)) { |
3996 | /* SSLfatal() already called */ | |
3434f40b | 3997 | goto err; |
f63a17d6 | 3998 | } |
3434f40b | 3999 | |
1b0286a3 | 4000 | OPENSSL_free(rawexts); |
e46f2334 MC |
4001 | return MSG_PROCESS_CONTINUE_READING; |
4002 | ||
4003 | err: | |
1b0286a3 | 4004 | OPENSSL_free(rawexts); |
e46f2334 MC |
4005 | return MSG_PROCESS_ERROR; |
4006 | } | |
4007 | ||
38b051a1 | 4008 | int ssl_do_client_cert_cb(SSL_CONNECTION *s, X509 **px509, EVP_PKEY **ppkey) |
0f113f3e MC |
4009 | { |
4010 | int i = 0; | |
38b051a1 TM |
4011 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
4012 | ||
368888bc | 4013 | #ifndef OPENSSL_NO_ENGINE |
38b051a1 | 4014 | if (sctx->client_cert_engine) { |
301fcb28 | 4015 | i = tls_engine_load_ssl_client_cert(s, px509, ppkey); |
0f113f3e MC |
4016 | if (i != 0) |
4017 | return i; | |
4018 | } | |
4019 | #endif | |
38b051a1 TM |
4020 | if (sctx->client_cert_cb) |
4021 | i = sctx->client_cert_cb(SSL_CONNECTION_GET_SSL(s), px509, ppkey); | |
0f113f3e MC |
4022 | return i; |
4023 | } | |
d45ba43d | 4024 | |
38b051a1 TM |
4025 | int ssl_cipher_list_to_bytes(SSL_CONNECTION *s, STACK_OF(SSL_CIPHER) *sk, |
4026 | WPACKET *pkt) | |
d45ba43d | 4027 | { |
2c7b4dbc | 4028 | int i; |
aafec89c | 4029 | size_t totlen = 0, len, maxlen, maxverok = 0; |
d45ba43d | 4030 | int empty_reneg_info_scsv = !s->renegotiate; |
38b051a1 | 4031 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
1d0c08b4 | 4032 | |
d45ba43d | 4033 | /* Set disabled masks for this session */ |
1d0c08b4 | 4034 | if (!ssl_set_client_disabled(s)) { |
c48ffbcc | 4035 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_NO_PROTOCOLS_AVAILABLE); |
1d0c08b4 MC |
4036 | return 0; |
4037 | } | |
d45ba43d | 4038 | |
f63a17d6 | 4039 | if (sk == NULL) { |
c48ffbcc | 4040 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
26a7d938 | 4041 | return 0; |
f63a17d6 | 4042 | } |
d45ba43d | 4043 | |
2c7b4dbc MC |
4044 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
4045 | # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6 | |
4046 | # error Max cipher length too short | |
4047 | # endif | |
4048 | /* | |
4049 | * Some servers hang if client hello > 256 bytes as hack workaround | |
4050 | * chop number of supported ciphers to keep it well below this if we | |
4051 | * use TLS v1.2 | |
4052 | */ | |
38b051a1 | 4053 | if (TLS1_get_version(ssl) >= TLS1_2_VERSION) |
2c7b4dbc MC |
4054 | maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; |
4055 | else | |
4056 | #endif | |
4057 | /* Maximum length that can be stored in 2 bytes. Length must be even */ | |
4058 | maxlen = 0xfffe; | |
4059 | ||
4060 | if (empty_reneg_info_scsv) | |
4061 | maxlen -= 2; | |
4062 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) | |
4063 | maxlen -= 2; | |
4064 | ||
4065 | for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) { | |
4066 | const SSL_CIPHER *c; | |
4067 | ||
d45ba43d MC |
4068 | c = sk_SSL_CIPHER_value(sk, i); |
4069 | /* Skip disabled ciphers */ | |
8af91fd9 | 4070 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0)) |
d45ba43d | 4071 | continue; |
2c7b4dbc | 4072 | |
38b051a1 | 4073 | if (!ssl->method->put_cipher_by_char(c, pkt, &len)) { |
c48ffbcc | 4074 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
2c7b4dbc MC |
4075 | return 0; |
4076 | } | |
4077 | ||
aafec89c MC |
4078 | /* Sanity check that the maximum version we offer has ciphers enabled */ |
4079 | if (!maxverok) { | |
38b051a1 | 4080 | if (SSL_CONNECTION_IS_DTLS(s)) { |
555cbb32 TS |
4081 | if (DTLS_VERSION_GE(c->max_dtls, s->s3.tmp.max_ver) |
4082 | && DTLS_VERSION_LE(c->min_dtls, s->s3.tmp.max_ver)) | |
aafec89c MC |
4083 | maxverok = 1; |
4084 | } else { | |
555cbb32 TS |
4085 | if (c->max_tls >= s->s3.tmp.max_ver |
4086 | && c->min_tls <= s->s3.tmp.max_ver) | |
aafec89c MC |
4087 | maxverok = 1; |
4088 | } | |
4089 | } | |
4090 | ||
2c7b4dbc | 4091 | totlen += len; |
d45ba43d | 4092 | } |
2c7b4dbc | 4093 | |
aafec89c | 4094 | if (totlen == 0 || !maxverok) { |
c48ffbcc RL |
4095 | const char *maxvertext = |
4096 | !maxverok | |
4097 | ? "No ciphers enabled for max supported SSL/TLS version" | |
4098 | : NULL; | |
aafec89c | 4099 | |
c48ffbcc RL |
4100 | SSLfatal_data(s, SSL_AD_INTERNAL_ERROR, SSL_R_NO_CIPHERS_AVAILABLE, |
4101 | maxvertext); | |
2c7b4dbc MC |
4102 | return 0; |
4103 | } | |
4104 | ||
4105 | if (totlen != 0) { | |
d45ba43d MC |
4106 | if (empty_reneg_info_scsv) { |
4107 | static SSL_CIPHER scsv = { | |
bbb4ceb8 | 4108 | 0, NULL, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 |
d45ba43d | 4109 | }; |
38b051a1 | 4110 | if (!ssl->method->put_cipher_by_char(&scsv, pkt, &len)) { |
c48ffbcc | 4111 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
2c7b4dbc MC |
4112 | return 0; |
4113 | } | |
d45ba43d MC |
4114 | } |
4115 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
4116 | static SSL_CIPHER scsv = { | |
bbb4ceb8 | 4117 | 0, NULL, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 |
d45ba43d | 4118 | }; |
38b051a1 | 4119 | if (!ssl->method->put_cipher_by_char(&scsv, pkt, &len)) { |
c48ffbcc | 4120 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
2c7b4dbc MC |
4121 | return 0; |
4122 | } | |
d45ba43d MC |
4123 | } |
4124 | } | |
4125 | ||
2c7b4dbc | 4126 | return 1; |
d45ba43d | 4127 | } |
ef6c191b | 4128 | |
67ec6d2b | 4129 | CON_FUNC_RETURN tls_construct_end_of_early_data(SSL_CONNECTION *s, WPACKET *pkt) |
ef6c191b MC |
4130 | { |
4131 | if (s->early_data_state != SSL_EARLY_DATA_WRITE_RETRY | |
4132 | && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING) { | |
c48ffbcc | 4133 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
67ec6d2b | 4134 | return CON_FUNC_ERROR; |
ef6c191b MC |
4135 | } |
4136 | ||
4137 | s->early_data_state = SSL_EARLY_DATA_FINISHED_WRITING; | |
67ec6d2b | 4138 | return CON_FUNC_SUCCESS; |
ef6c191b | 4139 | } |