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846e33c7 | 1 | /* |
9d75dce3 | 2 | * Copyright 1995-2018 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. |
8e2f6b79 | 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 | |
8e2f6b79 | 10 | */ |
846e33c7 | 11 | |
d02b48c6 | 12 | #include <stdio.h> |
706457b7 DMSP |
13 | #include "../ssl_local.h" |
14 | #include "statem_local.h" | |
15 | #include "internal/constant_time.h" | |
3faa07b5 | 16 | #include "internal/cryptlib.h" |
ec577822 BM |
17 | #include <openssl/buffer.h> |
18 | #include <openssl/rand.h> | |
19 | #include <openssl/objects.h> | |
20 | #include <openssl/evp.h> | |
6434abbf | 21 | #include <openssl/hmac.h> |
ec577822 | 22 | #include <openssl/x509.h> |
3c27208f | 23 | #include <openssl/dh.h> |
d095b68d | 24 | #include <openssl/bn.h> |
dbad1690 | 25 | #include <openssl/md5.h> |
77359d22 | 26 | #include <openssl/trace.h> |
e7db9680 | 27 | #include <openssl/core_names.h> |
4e3ee452 | 28 | #include <openssl/asn1t.h> |
f9b3bff6 | 29 | |
4ff1a526 MC |
30 | #define TICKET_NONCE_SIZE 8 |
31 | ||
4e3ee452 DB |
32 | typedef struct { |
33 | ASN1_TYPE *kxBlob; | |
34 | ASN1_TYPE *opaqueBlob; | |
35 | } GOST_KX_MESSAGE; | |
36 | ||
37 | DECLARE_ASN1_FUNCTIONS(GOST_KX_MESSAGE) | |
38 | ||
39 | ASN1_SEQUENCE(GOST_KX_MESSAGE) = { | |
40 | ASN1_SIMPLE(GOST_KX_MESSAGE, kxBlob, ASN1_ANY), | |
41 | ASN1_OPT(GOST_KX_MESSAGE, opaqueBlob, ASN1_ANY), | |
42 | } ASN1_SEQUENCE_END(GOST_KX_MESSAGE) | |
43 | ||
44 | IMPLEMENT_ASN1_FUNCTIONS(GOST_KX_MESSAGE) | |
45 | ||
e46f2334 | 46 | static int tls_construct_encrypted_extensions(SSL *s, WPACKET *pkt); |
d45ba43d | 47 | |
61ae935a | 48 | /* |
0f1e51ea MC |
49 | * ossl_statem_server13_read_transition() encapsulates the logic for the allowed |
50 | * handshake state transitions when a TLSv1.3 server is reading messages from | |
51 | * the client. The message type that the client has sent is provided in |mt|. | |
52 | * The current state is in |s->statem.hand_state|. | |
53 | * | |
94ed2c67 MC |
54 | * Return values are 1 for success (transition allowed) and 0 on error |
55 | * (transition not allowed) | |
0f1e51ea MC |
56 | */ |
57 | static int ossl_statem_server13_read_transition(SSL *s, int mt) | |
58 | { | |
59 | OSSL_STATEM *st = &s->statem; | |
60 | ||
61 | /* | |
62 | * Note: There is no case for TLS_ST_BEFORE because at that stage we have | |
63 | * not negotiated TLSv1.3 yet, so that case is handled by | |
64 | * ossl_statem_server_read_transition() | |
65 | */ | |
66 | switch (st->hand_state) { | |
67 | default: | |
68 | break; | |
69 | ||
d7f8783f | 70 | case TLS_ST_EARLY_DATA: |
fc7129dc | 71 | if (s->hello_retry_request == SSL_HRR_PENDING) { |
d4504fe5 MC |
72 | if (mt == SSL3_MT_CLIENT_HELLO) { |
73 | st->hand_state = TLS_ST_SR_CLNT_HELLO; | |
74 | return 1; | |
75 | } | |
76 | break; | |
77 | } else if (s->ext.early_data == SSL_EARLY_DATA_ACCEPTED) { | |
ef6c191b MC |
78 | if (mt == SSL3_MT_END_OF_EARLY_DATA) { |
79 | st->hand_state = TLS_ST_SR_END_OF_EARLY_DATA; | |
80 | return 1; | |
81 | } | |
82 | break; | |
83 | } | |
84 | /* Fall through */ | |
85 | ||
86 | case TLS_ST_SR_END_OF_EARLY_DATA: | |
92760c21 | 87 | case TLS_ST_SW_FINISHED: |
555cbb32 | 88 | if (s->s3.tmp.cert_request) { |
0f1e51ea MC |
89 | if (mt == SSL3_MT_CERTIFICATE) { |
90 | st->hand_state = TLS_ST_SR_CERT; | |
91 | return 1; | |
92 | } | |
93 | } else { | |
92760c21 MC |
94 | if (mt == SSL3_MT_FINISHED) { |
95 | st->hand_state = TLS_ST_SR_FINISHED; | |
0f1e51ea MC |
96 | return 1; |
97 | } | |
98 | } | |
99 | break; | |
100 | ||
101 | case TLS_ST_SR_CERT: | |
102 | if (s->session->peer == NULL) { | |
92760c21 MC |
103 | if (mt == SSL3_MT_FINISHED) { |
104 | st->hand_state = TLS_ST_SR_FINISHED; | |
0f1e51ea MC |
105 | return 1; |
106 | } | |
107 | } else { | |
108 | if (mt == SSL3_MT_CERTIFICATE_VERIFY) { | |
109 | st->hand_state = TLS_ST_SR_CERT_VRFY; | |
110 | return 1; | |
111 | } | |
112 | } | |
113 | break; | |
114 | ||
115 | case TLS_ST_SR_CERT_VRFY: | |
0f1e51ea MC |
116 | if (mt == SSL3_MT_FINISHED) { |
117 | st->hand_state = TLS_ST_SR_FINISHED; | |
118 | return 1; | |
119 | } | |
120 | break; | |
8cdc8c51 MC |
121 | |
122 | case TLS_ST_OK: | |
10109364 MC |
123 | /* |
124 | * Its never ok to start processing handshake messages in the middle of | |
125 | * early data (i.e. before we've received the end of early data alert) | |
126 | */ | |
127 | if (s->early_data_state == SSL_EARLY_DATA_READING) | |
128 | break; | |
9d75dce3 TS |
129 | |
130 | if (mt == SSL3_MT_CERTIFICATE | |
131 | && s->post_handshake_auth == SSL_PHA_REQUESTED) { | |
132 | st->hand_state = TLS_ST_SR_CERT; | |
133 | return 1; | |
134 | } | |
135 | ||
8cdc8c51 MC |
136 | if (mt == SSL3_MT_KEY_UPDATE) { |
137 | st->hand_state = TLS_ST_SR_KEY_UPDATE; | |
138 | return 1; | |
139 | } | |
140 | break; | |
0f1e51ea MC |
141 | } |
142 | ||
143 | /* No valid transition found */ | |
0f1e51ea MC |
144 | return 0; |
145 | } | |
146 | ||
147 | /* | |
148 | * ossl_statem_server_read_transition() encapsulates the logic for the allowed | |
149 | * handshake state transitions when the server is reading messages from the | |
150 | * client. The message type that the client has sent is provided in |mt|. The | |
151 | * current state is in |s->statem.hand_state|. | |
61ae935a | 152 | * |
94ed2c67 MC |
153 | * Return values are 1 for success (transition allowed) and 0 on error |
154 | * (transition not allowed) | |
61ae935a | 155 | */ |
8481f583 | 156 | int ossl_statem_server_read_transition(SSL *s, int mt) |
61ae935a | 157 | { |
d6f1a6e9 | 158 | OSSL_STATEM *st = &s->statem; |
61ae935a | 159 | |
f5ca0b04 | 160 | if (SSL_IS_TLS13(s)) { |
5abeaf35 MC |
161 | if (!ossl_statem_server13_read_transition(s, mt)) |
162 | goto err; | |
163 | return 1; | |
164 | } | |
0f1e51ea | 165 | |
e8aa8b6c | 166 | switch (st->hand_state) { |
f3b3d7f0 RS |
167 | default: |
168 | break; | |
169 | ||
61ae935a | 170 | case TLS_ST_BEFORE: |
0386aad1 | 171 | case TLS_ST_OK: |
61ae935a MC |
172 | case DTLS_ST_SW_HELLO_VERIFY_REQUEST: |
173 | if (mt == SSL3_MT_CLIENT_HELLO) { | |
174 | st->hand_state = TLS_ST_SR_CLNT_HELLO; | |
175 | return 1; | |
176 | } | |
177 | break; | |
178 | ||
179 | case TLS_ST_SW_SRVR_DONE: | |
180 | /* | |
181 | * If we get a CKE message after a ServerDone then either | |
182 | * 1) We didn't request a Certificate | |
183 | * OR | |
184 | * 2) If we did request one then | |
185 | * a) We allow no Certificate to be returned | |
186 | * AND | |
187 | * b) We are running SSL3 (in TLS1.0+ the client must return a 0 | |
188 | * list if we requested a certificate) | |
189 | */ | |
0f512756 | 190 | if (mt == SSL3_MT_CLIENT_KEY_EXCHANGE) { |
555cbb32 | 191 | if (s->s3.tmp.cert_request) { |
0f512756 | 192 | if (s->version == SSL3_VERSION) { |
23dd09b5 MC |
193 | if ((s->verify_mode & SSL_VERIFY_PEER) |
194 | && (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) { | |
0f512756 MC |
195 | /* |
196 | * This isn't an unexpected message as such - we're just | |
23dd09b5 MC |
197 | * not going to accept it because we require a client |
198 | * cert. | |
0f512756 | 199 | */ |
3ec8d113 MC |
200 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
201 | SSL_F_OSSL_STATEM_SERVER_READ_TRANSITION, | |
202 | SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE); | |
0f512756 MC |
203 | return 0; |
204 | } | |
205 | st->hand_state = TLS_ST_SR_KEY_EXCH; | |
206 | return 1; | |
207 | } | |
208 | } else { | |
209 | st->hand_state = TLS_ST_SR_KEY_EXCH; | |
210 | return 1; | |
211 | } | |
555cbb32 | 212 | } else if (s->s3.tmp.cert_request) { |
61ae935a MC |
213 | if (mt == SSL3_MT_CERTIFICATE) { |
214 | st->hand_state = TLS_ST_SR_CERT; | |
215 | return 1; | |
f100b031 | 216 | } |
61ae935a MC |
217 | } |
218 | break; | |
219 | ||
220 | case TLS_ST_SR_CERT: | |
221 | if (mt == SSL3_MT_CLIENT_KEY_EXCHANGE) { | |
222 | st->hand_state = TLS_ST_SR_KEY_EXCH; | |
223 | return 1; | |
224 | } | |
225 | break; | |
226 | ||
227 | case TLS_ST_SR_KEY_EXCH: | |
228 | /* | |
229 | * We should only process a CertificateVerify message if we have | |
230 | * received a Certificate from the client. If so then |s->session->peer| | |
231 | * will be non NULL. In some instances a CertificateVerify message is | |
232 | * not required even if the peer has sent a Certificate (e.g. such as in | |
a71a4966 | 233 | * the case of static DH). In that case |st->no_cert_verify| should be |
61ae935a MC |
234 | * set. |
235 | */ | |
a71a4966 | 236 | if (s->session->peer == NULL || st->no_cert_verify) { |
61ae935a MC |
237 | if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
238 | /* | |
239 | * For the ECDH ciphersuites when the client sends its ECDH | |
240 | * pub key in a certificate, the CertificateVerify message is | |
241 | * not sent. Also for GOST ciphersuites when the client uses | |
242 | * its key from the certificate for key exchange. | |
243 | */ | |
244 | st->hand_state = TLS_ST_SR_CHANGE; | |
245 | return 1; | |
246 | } | |
247 | } else { | |
248 | if (mt == SSL3_MT_CERTIFICATE_VERIFY) { | |
249 | st->hand_state = TLS_ST_SR_CERT_VRFY; | |
250 | return 1; | |
251 | } | |
252 | } | |
253 | break; | |
254 | ||
255 | case TLS_ST_SR_CERT_VRFY: | |
256 | if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
257 | st->hand_state = TLS_ST_SR_CHANGE; | |
258 | return 1; | |
259 | } | |
260 | break; | |
261 | ||
262 | case TLS_ST_SR_CHANGE: | |
263 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
555cbb32 | 264 | if (s->s3.npn_seen) { |
61ae935a MC |
265 | if (mt == SSL3_MT_NEXT_PROTO) { |
266 | st->hand_state = TLS_ST_SR_NEXT_PROTO; | |
267 | return 1; | |
268 | } | |
269 | } else { | |
270 | #endif | |
271 | if (mt == SSL3_MT_FINISHED) { | |
272 | st->hand_state = TLS_ST_SR_FINISHED; | |
273 | return 1; | |
274 | } | |
275 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
276 | } | |
277 | #endif | |
278 | break; | |
279 | ||
280 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
281 | case TLS_ST_SR_NEXT_PROTO: | |
282 | if (mt == SSL3_MT_FINISHED) { | |
283 | st->hand_state = TLS_ST_SR_FINISHED; | |
284 | return 1; | |
285 | } | |
286 | break; | |
287 | #endif | |
288 | ||
289 | case TLS_ST_SW_FINISHED: | |
290 | if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
291 | st->hand_state = TLS_ST_SR_CHANGE; | |
292 | return 1; | |
293 | } | |
294 | break; | |
61ae935a MC |
295 | } |
296 | ||
5abeaf35 | 297 | err: |
61ae935a | 298 | /* No valid transition found */ |
f20404fc MC |
299 | if (SSL_IS_DTLS(s) && mt == SSL3_MT_CHANGE_CIPHER_SPEC) { |
300 | BIO *rbio; | |
301 | ||
302 | /* | |
303 | * CCS messages don't have a message sequence number so this is probably | |
304 | * because of an out-of-order CCS. We'll just drop it. | |
305 | */ | |
306 | s->init_num = 0; | |
307 | s->rwstate = SSL_READING; | |
308 | rbio = SSL_get_rbio(s); | |
309 | BIO_clear_retry_flags(rbio); | |
310 | BIO_set_retry_read(rbio); | |
311 | return 0; | |
312 | } | |
f63a17d6 MC |
313 | SSLfatal(s, SSL3_AD_UNEXPECTED_MESSAGE, |
314 | SSL_F_OSSL_STATEM_SERVER_READ_TRANSITION, | |
315 | SSL_R_UNEXPECTED_MESSAGE); | |
61ae935a MC |
316 | return 0; |
317 | } | |
318 | ||
319 | /* | |
320 | * Should we send a ServerKeyExchange message? | |
321 | * | |
322 | * Valid return values are: | |
323 | * 1: Yes | |
324 | * 0: No | |
325 | */ | |
bb3e20cf | 326 | static int send_server_key_exchange(SSL *s) |
61ae935a | 327 | { |
555cbb32 | 328 | unsigned long alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
61ae935a MC |
329 | |
330 | /* | |
361a1191 | 331 | * only send a ServerKeyExchange if DH or fortezza but we have a |
61ae935a MC |
332 | * sign only certificate PSK: may send PSK identity hints For |
333 | * ECC ciphersuites, we send a serverKeyExchange message only if | |
334 | * the cipher suite is either ECDH-anon or ECDHE. In other cases, | |
335 | * the server certificate contains the server's public key for | |
336 | * key exchange. | |
337 | */ | |
a230b26e | 338 | if (alg_k & (SSL_kDHE | SSL_kECDHE) |
61ae935a MC |
339 | /* |
340 | * PSK: send ServerKeyExchange if PSK identity hint if | |
341 | * provided | |
342 | */ | |
343 | #ifndef OPENSSL_NO_PSK | |
344 | /* Only send SKE if we have identity hint for plain PSK */ | |
345 | || ((alg_k & (SSL_kPSK | SSL_kRSAPSK)) | |
346 | && s->cert->psk_identity_hint) | |
347 | /* For other PSK always send SKE */ | |
348 | || (alg_k & (SSL_PSK & (SSL_kDHEPSK | SSL_kECDHEPSK))) | |
349 | #endif | |
350 | #ifndef OPENSSL_NO_SRP | |
351 | /* SRP: send ServerKeyExchange */ | |
352 | || (alg_k & SSL_kSRP) | |
353 | #endif | |
a230b26e | 354 | ) { |
61ae935a MC |
355 | return 1; |
356 | } | |
357 | ||
358 | return 0; | |
359 | } | |
360 | ||
361 | /* | |
362 | * Should we send a CertificateRequest message? | |
363 | * | |
364 | * Valid return values are: | |
365 | * 1: Yes | |
366 | * 0: No | |
367 | */ | |
9d75dce3 | 368 | int send_certificate_request(SSL *s) |
61ae935a MC |
369 | { |
370 | if ( | |
371 | /* don't request cert unless asked for it: */ | |
372 | s->verify_mode & SSL_VERIFY_PEER | |
9d75dce3 TS |
373 | /* |
374 | * don't request if post-handshake-only unless doing | |
375 | * post-handshake in TLSv1.3: | |
376 | */ | |
377 | && (!SSL_IS_TLS13(s) || !(s->verify_mode & SSL_VERIFY_POST_HANDSHAKE) | |
378 | || s->post_handshake_auth == SSL_PHA_REQUEST_PENDING) | |
61ae935a MC |
379 | /* |
380 | * if SSL_VERIFY_CLIENT_ONCE is set, don't request cert | |
9d75dce3 | 381 | * a second time: |
61ae935a | 382 | */ |
9d75dce3 | 383 | && (s->certreqs_sent < 1 || |
61ae935a MC |
384 | !(s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) |
385 | /* | |
386 | * never request cert in anonymous ciphersuites (see | |
387 | * section "Certificate request" in SSL 3 drafts and in | |
388 | * RFC 2246): | |
389 | */ | |
555cbb32 | 390 | && (!(s->s3.tmp.new_cipher->algorithm_auth & SSL_aNULL) |
a230b26e EK |
391 | /* |
392 | * ... except when the application insists on | |
393 | * verification (against the specs, but statem_clnt.c accepts | |
394 | * this for SSL 3) | |
395 | */ | |
61ae935a MC |
396 | || (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) |
397 | /* don't request certificate for SRP auth */ | |
555cbb32 | 398 | && !(s->s3.tmp.new_cipher->algorithm_auth & SSL_aSRP) |
61ae935a MC |
399 | /* |
400 | * With normal PSK Certificates and Certificate Requests | |
401 | * are omitted | |
402 | */ | |
555cbb32 | 403 | && !(s->s3.tmp.new_cipher->algorithm_auth & SSL_aPSK)) { |
61ae935a MC |
404 | return 1; |
405 | } | |
406 | ||
407 | return 0; | |
408 | } | |
409 | ||
410 | /* | |
0f1e51ea MC |
411 | * ossl_statem_server13_write_transition() works out what handshake state to |
412 | * move to next when a TLSv1.3 server is writing messages to be sent to the | |
413 | * client. | |
0f1e51ea MC |
414 | */ |
415 | static WRITE_TRAN ossl_statem_server13_write_transition(SSL *s) | |
416 | { | |
417 | OSSL_STATEM *st = &s->statem; | |
418 | ||
419 | /* | |
420 | * No case for TLS_ST_BEFORE, because at that stage we have not negotiated | |
421 | * TLSv1.3 yet, so that is handled by ossl_statem_server_write_transition() | |
422 | */ | |
423 | ||
424 | switch (st->hand_state) { | |
425 | default: | |
426 | /* Shouldn't happen */ | |
3ec8d113 MC |
427 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
428 | SSL_F_OSSL_STATEM_SERVER13_WRITE_TRANSITION, | |
429 | ERR_R_INTERNAL_ERROR); | |
0f1e51ea MC |
430 | return WRITE_TRAN_ERROR; |
431 | ||
44c04a2e MC |
432 | case TLS_ST_OK: |
433 | if (s->key_update != SSL_KEY_UPDATE_NONE) { | |
434 | st->hand_state = TLS_ST_SW_KEY_UPDATE; | |
435 | return WRITE_TRAN_CONTINUE; | |
436 | } | |
9d75dce3 TS |
437 | if (s->post_handshake_auth == SSL_PHA_REQUEST_PENDING) { |
438 | st->hand_state = TLS_ST_SW_CERT_REQ; | |
439 | return WRITE_TRAN_CONTINUE; | |
440 | } | |
8cdc8c51 MC |
441 | /* Try to read from the client instead */ |
442 | return WRITE_TRAN_FINISHED; | |
44c04a2e | 443 | |
0f1e51ea | 444 | case TLS_ST_SR_CLNT_HELLO: |
597c51bc | 445 | st->hand_state = TLS_ST_SW_SRVR_HELLO; |
d4504fe5 | 446 | return WRITE_TRAN_CONTINUE; |
7d061fce | 447 | |
0f1e51ea | 448 | case TLS_ST_SW_SRVR_HELLO: |
fc7129dc MC |
449 | if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0 |
450 | && s->hello_retry_request != SSL_HRR_COMPLETE) | |
db37d32c | 451 | st->hand_state = TLS_ST_SW_CHANGE; |
fc7129dc MC |
452 | else if (s->hello_retry_request == SSL_HRR_PENDING) |
453 | st->hand_state = TLS_ST_EARLY_DATA; | |
db37d32c MC |
454 | else |
455 | st->hand_state = TLS_ST_SW_ENCRYPTED_EXTENSIONS; | |
456 | return WRITE_TRAN_CONTINUE; | |
457 | ||
458 | case TLS_ST_SW_CHANGE: | |
fc7129dc MC |
459 | if (s->hello_retry_request == SSL_HRR_PENDING) |
460 | st->hand_state = TLS_ST_EARLY_DATA; | |
461 | else | |
462 | st->hand_state = TLS_ST_SW_ENCRYPTED_EXTENSIONS; | |
e46f2334 MC |
463 | return WRITE_TRAN_CONTINUE; |
464 | ||
465 | case TLS_ST_SW_ENCRYPTED_EXTENSIONS: | |
94ed2c67 | 466 | if (s->hit) |
92760c21 MC |
467 | st->hand_state = TLS_ST_SW_FINISHED; |
468 | else if (send_certificate_request(s)) | |
469 | st->hand_state = TLS_ST_SW_CERT_REQ; | |
94ed2c67 | 470 | else |
0f1e51ea | 471 | st->hand_state = TLS_ST_SW_CERT; |
94ed2c67 | 472 | |
0f1e51ea MC |
473 | return WRITE_TRAN_CONTINUE; |
474 | ||
0f1e51ea | 475 | case TLS_ST_SW_CERT_REQ: |
9d75dce3 TS |
476 | if (s->post_handshake_auth == SSL_PHA_REQUEST_PENDING) { |
477 | s->post_handshake_auth = SSL_PHA_REQUESTED; | |
478 | st->hand_state = TLS_ST_OK; | |
479 | } else { | |
480 | st->hand_state = TLS_ST_SW_CERT; | |
481 | } | |
0f1e51ea MC |
482 | return WRITE_TRAN_CONTINUE; |
483 | ||
92760c21 | 484 | case TLS_ST_SW_CERT: |
2c5dfdc3 MC |
485 | st->hand_state = TLS_ST_SW_CERT_VRFY; |
486 | return WRITE_TRAN_CONTINUE; | |
487 | ||
488 | case TLS_ST_SW_CERT_VRFY: | |
d805a57b | 489 | st->hand_state = TLS_ST_SW_FINISHED; |
0f1e51ea MC |
490 | return WRITE_TRAN_CONTINUE; |
491 | ||
492 | case TLS_ST_SW_FINISHED: | |
f7e393be MC |
493 | st->hand_state = TLS_ST_EARLY_DATA; |
494 | return WRITE_TRAN_CONTINUE; | |
94ed2c67 | 495 | |
d7f8783f MC |
496 | case TLS_ST_EARLY_DATA: |
497 | return WRITE_TRAN_FINISHED; | |
498 | ||
92760c21 | 499 | case TLS_ST_SR_FINISHED: |
30f05b19 MC |
500 | /* |
501 | * Technically we have finished the handshake at this point, but we're | |
9d0a8bb7 | 502 | * going to remain "in_init" for now and write out any session tickets |
30f05b19 | 503 | * immediately. |
30f05b19 | 504 | */ |
c0638ade MC |
505 | if (s->post_handshake_auth == SSL_PHA_REQUESTED) { |
506 | s->post_handshake_auth = SSL_PHA_EXT_RECEIVED; | |
61fb5923 | 507 | } else if (!s->ext.ticket_expected) { |
c0638ade | 508 | /* |
61fb5923 MC |
509 | * If we're not going to renew the ticket then we just finish the |
510 | * handshake at this point. | |
c0638ade MC |
511 | */ |
512 | st->hand_state = TLS_ST_OK; | |
9d0a8bb7 | 513 | return WRITE_TRAN_CONTINUE; |
c0638ade | 514 | } |
9d0a8bb7 MC |
515 | if (s->num_tickets > s->sent_tickets) |
516 | st->hand_state = TLS_ST_SW_SESSION_TICKET; | |
517 | else | |
518 | st->hand_state = TLS_ST_OK; | |
30f05b19 MC |
519 | return WRITE_TRAN_CONTINUE; |
520 | ||
8cdc8c51 | 521 | case TLS_ST_SR_KEY_UPDATE: |
44c04a2e | 522 | case TLS_ST_SW_KEY_UPDATE: |
36ff232c MC |
523 | st->hand_state = TLS_ST_OK; |
524 | return WRITE_TRAN_CONTINUE; | |
525 | ||
30f05b19 | 526 | case TLS_ST_SW_SESSION_TICKET: |
9d0a8bb7 MC |
527 | /* In a resumption we only ever send a maximum of one new ticket. |
528 | * Following an initial handshake we send the number of tickets we have | |
529 | * been configured for. | |
530 | */ | |
531 | if (s->hit || s->num_tickets <= s->sent_tickets) { | |
532 | /* We've written enough tickets out. */ | |
533 | st->hand_state = TLS_ST_OK; | |
534 | } | |
0f1e51ea MC |
535 | return WRITE_TRAN_CONTINUE; |
536 | } | |
537 | } | |
538 | ||
539 | /* | |
540 | * ossl_statem_server_write_transition() works out what handshake state to move | |
541 | * to next when the server is writing messages to be sent to the client. | |
61ae935a | 542 | */ |
8481f583 | 543 | WRITE_TRAN ossl_statem_server_write_transition(SSL *s) |
61ae935a | 544 | { |
d6f1a6e9 | 545 | OSSL_STATEM *st = &s->statem; |
61ae935a | 546 | |
0f1e51ea MC |
547 | /* |
548 | * Note that before the ClientHello we don't know what version we are going | |
549 | * to negotiate yet, so we don't take this branch until later | |
550 | */ | |
551 | ||
f5ca0b04 | 552 | if (SSL_IS_TLS13(s)) |
0f1e51ea MC |
553 | return ossl_statem_server13_write_transition(s); |
554 | ||
e8aa8b6c | 555 | switch (st->hand_state) { |
f3b3d7f0 RS |
556 | default: |
557 | /* Shouldn't happen */ | |
3ec8d113 MC |
558 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
559 | SSL_F_OSSL_STATEM_SERVER_WRITE_TRANSITION, | |
560 | ERR_R_INTERNAL_ERROR); | |
f3b3d7f0 RS |
561 | return WRITE_TRAN_ERROR; |
562 | ||
0386aad1 MC |
563 | case TLS_ST_OK: |
564 | if (st->request_state == TLS_ST_SW_HELLO_REQ) { | |
565 | /* We must be trying to renegotiate */ | |
566 | st->hand_state = TLS_ST_SW_HELLO_REQ; | |
567 | st->request_state = TLS_ST_BEFORE; | |
568 | return WRITE_TRAN_CONTINUE; | |
569 | } | |
c7f47786 MC |
570 | /* Must be an incoming ClientHello */ |
571 | if (!tls_setup_handshake(s)) { | |
f63a17d6 | 572 | /* SSLfatal() already called */ |
c7f47786 MC |
573 | return WRITE_TRAN_ERROR; |
574 | } | |
0386aad1 MC |
575 | /* Fall through */ |
576 | ||
e8aa8b6c | 577 | case TLS_ST_BEFORE: |
a230b26e | 578 | /* Just go straight to trying to read from the client */ |
e8aa8b6c | 579 | return WRITE_TRAN_FINISHED; |
61ae935a | 580 | |
e8aa8b6c F |
581 | case TLS_ST_SW_HELLO_REQ: |
582 | st->hand_state = TLS_ST_OK; | |
e8aa8b6c | 583 | return WRITE_TRAN_CONTINUE; |
61ae935a | 584 | |
e8aa8b6c F |
585 | case TLS_ST_SR_CLNT_HELLO: |
586 | if (SSL_IS_DTLS(s) && !s->d1->cookie_verified | |
3faa07b5 | 587 | && (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE)) { |
e8aa8b6c | 588 | st->hand_state = DTLS_ST_SW_HELLO_VERIFY_REQUEST; |
3faa07b5 MC |
589 | } else if (s->renegotiate == 0 && !SSL_IS_FIRST_HANDSHAKE(s)) { |
590 | /* We must have rejected the renegotiation */ | |
591 | st->hand_state = TLS_ST_OK; | |
592 | return WRITE_TRAN_CONTINUE; | |
593 | } else { | |
e8aa8b6c | 594 | st->hand_state = TLS_ST_SW_SRVR_HELLO; |
3faa07b5 | 595 | } |
e8aa8b6c | 596 | return WRITE_TRAN_CONTINUE; |
61ae935a | 597 | |
e8aa8b6c F |
598 | case DTLS_ST_SW_HELLO_VERIFY_REQUEST: |
599 | return WRITE_TRAN_FINISHED; | |
61ae935a | 600 | |
e8aa8b6c F |
601 | case TLS_ST_SW_SRVR_HELLO: |
602 | if (s->hit) { | |
aff8c126 | 603 | if (s->ext.ticket_expected) |
e8aa8b6c F |
604 | st->hand_state = TLS_ST_SW_SESSION_TICKET; |
605 | else | |
606 | st->hand_state = TLS_ST_SW_CHANGE; | |
607 | } else { | |
608 | /* Check if it is anon DH or anon ECDH, */ | |
609 | /* normal PSK or SRP */ | |
555cbb32 | 610 | if (!(s->s3.tmp.new_cipher->algorithm_auth & |
a230b26e | 611 | (SSL_aNULL | SSL_aSRP | SSL_aPSK))) { |
e8aa8b6c F |
612 | st->hand_state = TLS_ST_SW_CERT; |
613 | } else if (send_server_key_exchange(s)) { | |
61ae935a | 614 | st->hand_state = TLS_ST_SW_KEY_EXCH; |
e8aa8b6c | 615 | } else if (send_certificate_request(s)) { |
61ae935a | 616 | st->hand_state = TLS_ST_SW_CERT_REQ; |
e8aa8b6c F |
617 | } else { |
618 | st->hand_state = TLS_ST_SW_SRVR_DONE; | |
61ae935a | 619 | } |
e8aa8b6c F |
620 | } |
621 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 622 | |
e8aa8b6c | 623 | case TLS_ST_SW_CERT: |
aff8c126 | 624 | if (s->ext.status_expected) { |
e8aa8b6c | 625 | st->hand_state = TLS_ST_SW_CERT_STATUS; |
61ae935a | 626 | return WRITE_TRAN_CONTINUE; |
e8aa8b6c F |
627 | } |
628 | /* Fall through */ | |
61ae935a | 629 | |
e8aa8b6c F |
630 | case TLS_ST_SW_CERT_STATUS: |
631 | if (send_server_key_exchange(s)) { | |
632 | st->hand_state = TLS_ST_SW_KEY_EXCH; | |
61ae935a | 633 | return WRITE_TRAN_CONTINUE; |
e8aa8b6c F |
634 | } |
635 | /* Fall through */ | |
61ae935a | 636 | |
e8aa8b6c F |
637 | case TLS_ST_SW_KEY_EXCH: |
638 | if (send_certificate_request(s)) { | |
639 | st->hand_state = TLS_ST_SW_CERT_REQ; | |
61ae935a | 640 | return WRITE_TRAN_CONTINUE; |
e8aa8b6c F |
641 | } |
642 | /* Fall through */ | |
61ae935a | 643 | |
e8aa8b6c F |
644 | case TLS_ST_SW_CERT_REQ: |
645 | st->hand_state = TLS_ST_SW_SRVR_DONE; | |
646 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 647 | |
e8aa8b6c F |
648 | case TLS_ST_SW_SRVR_DONE: |
649 | return WRITE_TRAN_FINISHED; | |
650 | ||
651 | case TLS_ST_SR_FINISHED: | |
652 | if (s->hit) { | |
61ae935a | 653 | st->hand_state = TLS_ST_OK; |
61ae935a | 654 | return WRITE_TRAN_CONTINUE; |
aff8c126 | 655 | } else if (s->ext.ticket_expected) { |
e8aa8b6c F |
656 | st->hand_state = TLS_ST_SW_SESSION_TICKET; |
657 | } else { | |
658 | st->hand_state = TLS_ST_SW_CHANGE; | |
659 | } | |
660 | return WRITE_TRAN_CONTINUE; | |
661 | ||
662 | case TLS_ST_SW_SESSION_TICKET: | |
663 | st->hand_state = TLS_ST_SW_CHANGE; | |
664 | return WRITE_TRAN_CONTINUE; | |
61ae935a | 665 | |
e8aa8b6c F |
666 | case TLS_ST_SW_CHANGE: |
667 | st->hand_state = TLS_ST_SW_FINISHED; | |
668 | return WRITE_TRAN_CONTINUE; | |
669 | ||
670 | case TLS_ST_SW_FINISHED: | |
671 | if (s->hit) { | |
672 | return WRITE_TRAN_FINISHED; | |
673 | } | |
674 | st->hand_state = TLS_ST_OK; | |
e8aa8b6c | 675 | return WRITE_TRAN_CONTINUE; |
61ae935a MC |
676 | } |
677 | } | |
678 | ||
679 | /* | |
680 | * Perform any pre work that needs to be done prior to sending a message from | |
681 | * the server to the client. | |
682 | */ | |
8481f583 | 683 | WORK_STATE ossl_statem_server_pre_work(SSL *s, WORK_STATE wst) |
61ae935a | 684 | { |
d6f1a6e9 | 685 | OSSL_STATEM *st = &s->statem; |
61ae935a | 686 | |
e8aa8b6c | 687 | switch (st->hand_state) { |
f3b3d7f0 RS |
688 | default: |
689 | /* No pre work to be done */ | |
690 | break; | |
691 | ||
61ae935a MC |
692 | case TLS_ST_SW_HELLO_REQ: |
693 | s->shutdown = 0; | |
694 | if (SSL_IS_DTLS(s)) | |
f5c7f5df | 695 | dtls1_clear_sent_buffer(s); |
61ae935a MC |
696 | break; |
697 | ||
698 | case DTLS_ST_SW_HELLO_VERIFY_REQUEST: | |
699 | s->shutdown = 0; | |
700 | if (SSL_IS_DTLS(s)) { | |
f5c7f5df | 701 | dtls1_clear_sent_buffer(s); |
61ae935a MC |
702 | /* We don't buffer this message so don't use the timer */ |
703 | st->use_timer = 0; | |
704 | } | |
705 | break; | |
706 | ||
707 | case TLS_ST_SW_SRVR_HELLO: | |
708 | if (SSL_IS_DTLS(s)) { | |
709 | /* | |
69687aa8 | 710 | * Messages we write from now on should be buffered and |
61ae935a MC |
711 | * retransmitted if necessary, so we need to use the timer now |
712 | */ | |
713 | st->use_timer = 1; | |
714 | } | |
715 | break; | |
716 | ||
717 | case TLS_ST_SW_SRVR_DONE: | |
718 | #ifndef OPENSSL_NO_SCTP | |
3ec8d113 MC |
719 | if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s))) { |
720 | /* Calls SSLfatal() as required */ | |
61ae935a | 721 | return dtls_wait_for_dry(s); |
3ec8d113 | 722 | } |
61ae935a MC |
723 | #endif |
724 | return WORK_FINISHED_CONTINUE; | |
725 | ||
726 | case TLS_ST_SW_SESSION_TICKET: | |
36ff232c | 727 | if (SSL_IS_TLS13(s) && s->sent_tickets == 0) { |
30f05b19 MC |
728 | /* |
729 | * Actually this is the end of the handshake, but we're going | |
730 | * straight into writing the session ticket out. So we finish off | |
731 | * the handshake, but keep the various buffers active. | |
56d36288 | 732 | * |
3ec8d113 | 733 | * Calls SSLfatal as required. |
30f05b19 | 734 | */ |
2a8db717 | 735 | return tls_finish_handshake(s, wst, 0, 0); |
30f05b19 | 736 | } if (SSL_IS_DTLS(s)) { |
61ae935a MC |
737 | /* |
738 | * We're into the last flight. We don't retransmit the last flight | |
739 | * unless we need to, so we don't use the timer | |
740 | */ | |
741 | st->use_timer = 0; | |
742 | } | |
743 | break; | |
744 | ||
745 | case TLS_ST_SW_CHANGE: | |
fc7129dc MC |
746 | if (SSL_IS_TLS13(s)) |
747 | break; | |
555cbb32 | 748 | s->session->cipher = s->s3.tmp.new_cipher; |
61ae935a | 749 | if (!s->method->ssl3_enc->setup_key_block(s)) { |
f63a17d6 | 750 | /* SSLfatal() already called */ |
61ae935a MC |
751 | return WORK_ERROR; |
752 | } | |
753 | if (SSL_IS_DTLS(s)) { | |
754 | /* | |
755 | * We're into the last flight. We don't retransmit the last flight | |
756 | * unless we need to, so we don't use the timer. This might have | |
757 | * already been set to 0 if we sent a NewSessionTicket message, | |
758 | * but we'll set it again here in case we didn't. | |
759 | */ | |
760 | st->use_timer = 0; | |
761 | } | |
762 | return WORK_FINISHED_CONTINUE; | |
763 | ||
d7f8783f | 764 | case TLS_ST_EARLY_DATA: |
c36001c3 | 765 | if (s->early_data_state != SSL_EARLY_DATA_ACCEPTING |
555cbb32 | 766 | && (s->s3.flags & TLS1_FLAGS_STATELESS) == 0) |
f7e393be MC |
767 | return WORK_FINISHED_CONTINUE; |
768 | /* Fall through */ | |
769 | ||
61ae935a | 770 | case TLS_ST_OK: |
3ec8d113 | 771 | /* Calls SSLfatal() as required */ |
2a8db717 | 772 | return tls_finish_handshake(s, wst, 1, 1); |
61ae935a MC |
773 | } |
774 | ||
775 | return WORK_FINISHED_CONTINUE; | |
776 | } | |
777 | ||
f273ff95 MC |
778 | static ossl_inline int conn_is_closed(void) |
779 | { | |
780 | switch (get_last_sys_error()) { | |
781 | #if defined(EPIPE) | |
782 | case EPIPE: | |
783 | return 1; | |
784 | #endif | |
785 | #if defined(ECONNRESET) | |
786 | case ECONNRESET: | |
787 | return 1; | |
788 | #endif | |
0b885f72 PM |
789 | #if defined(WSAECONNRESET) |
790 | case WSAECONNRESET: | |
791 | return 1; | |
792 | #endif | |
f273ff95 MC |
793 | default: |
794 | return 0; | |
795 | } | |
796 | } | |
797 | ||
61ae935a MC |
798 | /* |
799 | * Perform any work that needs to be done after sending a message from the | |
800 | * server to the client. | |
801 | */ | |
8481f583 | 802 | WORK_STATE ossl_statem_server_post_work(SSL *s, WORK_STATE wst) |
61ae935a | 803 | { |
d6f1a6e9 | 804 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
805 | |
806 | s->init_num = 0; | |
807 | ||
e8aa8b6c | 808 | switch (st->hand_state) { |
f3b3d7f0 RS |
809 | default: |
810 | /* No post work to be done */ | |
811 | break; | |
812 | ||
61ae935a MC |
813 | case TLS_ST_SW_HELLO_REQ: |
814 | if (statem_flush(s) != 1) | |
815 | return WORK_MORE_A; | |
2c4a056f | 816 | if (!ssl3_init_finished_mac(s)) { |
f63a17d6 | 817 | /* SSLfatal() already called */ |
2c4a056f MC |
818 | return WORK_ERROR; |
819 | } | |
61ae935a MC |
820 | break; |
821 | ||
822 | case DTLS_ST_SW_HELLO_VERIFY_REQUEST: | |
823 | if (statem_flush(s) != 1) | |
824 | return WORK_MORE_A; | |
825 | /* HelloVerifyRequest resets Finished MAC */ | |
2c4a056f | 826 | if (s->version != DTLS1_BAD_VER && !ssl3_init_finished_mac(s)) { |
f63a17d6 | 827 | /* SSLfatal() already called */ |
2c4a056f MC |
828 | return WORK_ERROR; |
829 | } | |
61ae935a MC |
830 | /* |
831 | * The next message should be another ClientHello which we need to | |
832 | * treat like it was the first packet | |
833 | */ | |
834 | s->first_packet = 1; | |
835 | break; | |
836 | ||
837 | case TLS_ST_SW_SRVR_HELLO: | |
fc7129dc | 838 | if (SSL_IS_TLS13(s) && s->hello_retry_request == SSL_HRR_PENDING) { |
75259b43 MC |
839 | if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) == 0 |
840 | && statem_flush(s) != 1) | |
597c51bc MC |
841 | return WORK_MORE_A; |
842 | break; | |
843 | } | |
61ae935a MC |
844 | #ifndef OPENSSL_NO_SCTP |
845 | if (SSL_IS_DTLS(s) && s->hit) { | |
846 | unsigned char sctpauthkey[64]; | |
847 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
09d62b33 | 848 | size_t labellen; |
61ae935a MC |
849 | |
850 | /* | |
851 | * Add new shared key for SCTP-Auth, will be ignored if no | |
852 | * SCTP used. | |
853 | */ | |
141eb8c6 MC |
854 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
855 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
61ae935a | 856 | |
09d62b33 MT |
857 | /* Don't include the terminating zero. */ |
858 | labellen = sizeof(labelbuffer) - 1; | |
859 | if (s->mode & SSL_MODE_DTLS_SCTP_LABEL_LENGTH_BUG) | |
860 | labellen += 1; | |
861 | ||
61ae935a | 862 | if (SSL_export_keying_material(s, sctpauthkey, |
a230b26e | 863 | sizeof(sctpauthkey), labelbuffer, |
09d62b33 | 864 | labellen, NULL, 0, |
a230b26e | 865 | 0) <= 0) { |
3ec8d113 MC |
866 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
867 | SSL_F_OSSL_STATEM_SERVER_POST_WORK, | |
868 | ERR_R_INTERNAL_ERROR); | |
61ae935a MC |
869 | return WORK_ERROR; |
870 | } | |
871 | ||
872 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
873 | sizeof(sctpauthkey), sctpauthkey); | |
874 | } | |
875 | #endif | |
db37d32c | 876 | if (!SSL_IS_TLS13(s) |
fc7129dc MC |
877 | || ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0 |
878 | && s->hello_retry_request != SSL_HRR_COMPLETE)) | |
db37d32c MC |
879 | break; |
880 | /* Fall through */ | |
881 | ||
882 | case TLS_ST_SW_CHANGE: | |
75259b43 MC |
883 | if (s->hello_retry_request == SSL_HRR_PENDING) { |
884 | if (!statem_flush(s)) | |
885 | return WORK_MORE_A; | |
fc7129dc | 886 | break; |
75259b43 | 887 | } |
de9e884b | 888 | |
92760c21 MC |
889 | if (SSL_IS_TLS13(s)) { |
890 | if (!s->method->ssl3_enc->setup_key_block(s) | |
891 | || !s->method->ssl3_enc->change_cipher_state(s, | |
3ec8d113 MC |
892 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_SERVER_WRITE)) { |
893 | /* SSLfatal() already called */ | |
fe5e20fd | 894 | return WORK_ERROR; |
3ec8d113 | 895 | } |
fe5e20fd MC |
896 | |
897 | if (s->ext.early_data != SSL_EARLY_DATA_ACCEPTED | |
898 | && !s->method->ssl3_enc->change_cipher_state(s, | |
3ec8d113 MC |
899 | SSL3_CC_HANDSHAKE |SSL3_CHANGE_CIPHER_SERVER_READ)) { |
900 | /* SSLfatal() already called */ | |
fe5e20fd | 901 | return WORK_ERROR; |
3ec8d113 | 902 | } |
de9e884b MC |
903 | /* |
904 | * We don't yet know whether the next record we are going to receive | |
905 | * is an unencrypted alert, an encrypted alert, or an encrypted | |
906 | * handshake message. We temporarily tolerate unencrypted alerts. | |
907 | */ | |
908 | s->statem.enc_read_state = ENC_READ_STATE_ALLOW_PLAIN_ALERTS; | |
db37d32c | 909 | break; |
92760c21 | 910 | } |
61ae935a | 911 | |
61ae935a MC |
912 | #ifndef OPENSSL_NO_SCTP |
913 | if (SSL_IS_DTLS(s) && !s->hit) { | |
914 | /* | |
915 | * Change to new shared key of SCTP-Auth, will be ignored if | |
916 | * no SCTP used. | |
917 | */ | |
918 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
919 | 0, NULL); | |
920 | } | |
921 | #endif | |
922 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
a230b26e EK |
923 | SSL3_CHANGE_CIPHER_SERVER_WRITE)) |
924 | { | |
f63a17d6 | 925 | /* SSLfatal() already called */ |
61ae935a MC |
926 | return WORK_ERROR; |
927 | } | |
928 | ||
929 | if (SSL_IS_DTLS(s)) | |
930 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); | |
931 | break; | |
932 | ||
933 | case TLS_ST_SW_SRVR_DONE: | |
934 | if (statem_flush(s) != 1) | |
935 | return WORK_MORE_A; | |
936 | break; | |
937 | ||
938 | case TLS_ST_SW_FINISHED: | |
939 | if (statem_flush(s) != 1) | |
940 | return WORK_MORE_A; | |
941 | #ifndef OPENSSL_NO_SCTP | |
942 | if (SSL_IS_DTLS(s) && s->hit) { | |
943 | /* | |
944 | * Change to new shared key of SCTP-Auth, will be ignored if | |
945 | * no SCTP used. | |
946 | */ | |
947 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
948 | 0, NULL); | |
949 | } | |
950 | #endif | |
92760c21 MC |
951 | if (SSL_IS_TLS13(s)) { |
952 | if (!s->method->ssl3_enc->generate_master_secret(s, | |
ec15acb6 | 953 | s->master_secret, s->handshake_secret, 0, |
92760c21 MC |
954 | &s->session->master_key_length) |
955 | || !s->method->ssl3_enc->change_cipher_state(s, | |
956 | SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_SERVER_WRITE)) | |
f63a17d6 | 957 | /* SSLfatal() already called */ |
92760c21 MC |
958 | return WORK_ERROR; |
959 | } | |
61ae935a | 960 | break; |
30f05b19 | 961 | |
9d75dce3 TS |
962 | case TLS_ST_SW_CERT_REQ: |
963 | if (s->post_handshake_auth == SSL_PHA_REQUEST_PENDING) { | |
964 | if (statem_flush(s) != 1) | |
965 | return WORK_MORE_A; | |
966 | } | |
967 | break; | |
968 | ||
44c04a2e | 969 | case TLS_ST_SW_KEY_UPDATE: |
57389a32 MC |
970 | if (statem_flush(s) != 1) |
971 | return WORK_MORE_A; | |
3ec8d113 MC |
972 | if (!tls13_update_key(s, 1)) { |
973 | /* SSLfatal() already called */ | |
57389a32 | 974 | return WORK_ERROR; |
3ec8d113 | 975 | } |
57389a32 MC |
976 | break; |
977 | ||
30f05b19 | 978 | case TLS_ST_SW_SESSION_TICKET: |
f273ff95 MC |
979 | clear_sys_error(); |
980 | if (SSL_IS_TLS13(s) && statem_flush(s) != 1) { | |
981 | if (SSL_get_error(s, 0) == SSL_ERROR_SYSCALL | |
982 | && conn_is_closed()) { | |
983 | /* | |
984 | * We ignore connection closed errors in TLSv1.3 when sending a | |
985 | * NewSessionTicket and behave as if we were successful. This is | |
986 | * so that we are still able to read data sent to us by a client | |
987 | * that closes soon after the end of the handshake without | |
988 | * waiting to read our post-handshake NewSessionTickets. | |
989 | */ | |
990 | s->rwstate = SSL_NOTHING; | |
991 | break; | |
992 | } | |
993 | ||
30f05b19 | 994 | return WORK_MORE_A; |
f273ff95 | 995 | } |
30f05b19 | 996 | break; |
61ae935a MC |
997 | } |
998 | ||
999 | return WORK_FINISHED_CONTINUE; | |
1000 | } | |
1001 | ||
1002 | /* | |
6392fb8e MC |
1003 | * Get the message construction function and message type for sending from the |
1004 | * server | |
61ae935a MC |
1005 | * |
1006 | * Valid return values are: | |
1007 | * 1: Success | |
1008 | * 0: Error | |
1009 | */ | |
6392fb8e | 1010 | int ossl_statem_server_construct_message(SSL *s, WPACKET *pkt, |
a15c953f | 1011 | confunc_f *confunc, int *mt) |
61ae935a | 1012 | { |
d6f1a6e9 | 1013 | OSSL_STATEM *st = &s->statem; |
61ae935a | 1014 | |
4a01c59f MC |
1015 | switch (st->hand_state) { |
1016 | default: | |
1017 | /* Shouldn't happen */ | |
f63a17d6 MC |
1018 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1019 | SSL_F_OSSL_STATEM_SERVER_CONSTRUCT_MESSAGE, | |
1020 | SSL_R_BAD_HANDSHAKE_STATE); | |
4a01c59f MC |
1021 | return 0; |
1022 | ||
1023 | case TLS_ST_SW_CHANGE: | |
5923ad4b | 1024 | if (SSL_IS_DTLS(s)) |
6392fb8e | 1025 | *confunc = dtls_construct_change_cipher_spec; |
4a01c59f | 1026 | else |
6392fb8e MC |
1027 | *confunc = tls_construct_change_cipher_spec; |
1028 | *mt = SSL3_MT_CHANGE_CIPHER_SPEC; | |
4a01c59f | 1029 | break; |
f3b3d7f0 | 1030 | |
4a01c59f | 1031 | case DTLS_ST_SW_HELLO_VERIFY_REQUEST: |
6392fb8e MC |
1032 | *confunc = dtls_construct_hello_verify_request; |
1033 | *mt = DTLS1_MT_HELLO_VERIFY_REQUEST; | |
4a01c59f | 1034 | break; |
61ae935a | 1035 | |
4a01c59f MC |
1036 | case TLS_ST_SW_HELLO_REQ: |
1037 | /* No construction function needed */ | |
6392fb8e MC |
1038 | *confunc = NULL; |
1039 | *mt = SSL3_MT_HELLO_REQUEST; | |
4a01c59f | 1040 | break; |
61ae935a | 1041 | |
4a01c59f | 1042 | case TLS_ST_SW_SRVR_HELLO: |
6392fb8e MC |
1043 | *confunc = tls_construct_server_hello; |
1044 | *mt = SSL3_MT_SERVER_HELLO; | |
4a01c59f | 1045 | break; |
61ae935a | 1046 | |
4a01c59f | 1047 | case TLS_ST_SW_CERT: |
6392fb8e MC |
1048 | *confunc = tls_construct_server_certificate; |
1049 | *mt = SSL3_MT_CERTIFICATE; | |
4a01c59f | 1050 | break; |
61ae935a | 1051 | |
2c5dfdc3 MC |
1052 | case TLS_ST_SW_CERT_VRFY: |
1053 | *confunc = tls_construct_cert_verify; | |
1054 | *mt = SSL3_MT_CERTIFICATE_VERIFY; | |
1055 | break; | |
1056 | ||
1057 | ||
4a01c59f | 1058 | case TLS_ST_SW_KEY_EXCH: |
6392fb8e MC |
1059 | *confunc = tls_construct_server_key_exchange; |
1060 | *mt = SSL3_MT_SERVER_KEY_EXCHANGE; | |
4a01c59f | 1061 | break; |
61ae935a | 1062 | |
4a01c59f | 1063 | case TLS_ST_SW_CERT_REQ: |
6392fb8e MC |
1064 | *confunc = tls_construct_certificate_request; |
1065 | *mt = SSL3_MT_CERTIFICATE_REQUEST; | |
4a01c59f | 1066 | break; |
61ae935a | 1067 | |
4a01c59f | 1068 | case TLS_ST_SW_SRVR_DONE: |
6392fb8e MC |
1069 | *confunc = tls_construct_server_done; |
1070 | *mt = SSL3_MT_SERVER_DONE; | |
4a01c59f | 1071 | break; |
61ae935a | 1072 | |
4a01c59f | 1073 | case TLS_ST_SW_SESSION_TICKET: |
6392fb8e MC |
1074 | *confunc = tls_construct_new_session_ticket; |
1075 | *mt = SSL3_MT_NEWSESSION_TICKET; | |
4a01c59f | 1076 | break; |
61ae935a | 1077 | |
4a01c59f | 1078 | case TLS_ST_SW_CERT_STATUS: |
6392fb8e MC |
1079 | *confunc = tls_construct_cert_status; |
1080 | *mt = SSL3_MT_CERTIFICATE_STATUS; | |
4a01c59f | 1081 | break; |
61ae935a | 1082 | |
4a01c59f | 1083 | case TLS_ST_SW_FINISHED: |
6392fb8e MC |
1084 | *confunc = tls_construct_finished; |
1085 | *mt = SSL3_MT_FINISHED; | |
4a01c59f | 1086 | break; |
e46f2334 | 1087 | |
f7e393be MC |
1088 | case TLS_ST_EARLY_DATA: |
1089 | *confunc = NULL; | |
1090 | *mt = SSL3_MT_DUMMY; | |
1091 | break; | |
1092 | ||
e46f2334 MC |
1093 | case TLS_ST_SW_ENCRYPTED_EXTENSIONS: |
1094 | *confunc = tls_construct_encrypted_extensions; | |
1095 | *mt = SSL3_MT_ENCRYPTED_EXTENSIONS; | |
1096 | break; | |
7d061fce | 1097 | |
44c04a2e MC |
1098 | case TLS_ST_SW_KEY_UPDATE: |
1099 | *confunc = tls_construct_key_update; | |
1100 | *mt = SSL3_MT_KEY_UPDATE; | |
1101 | break; | |
4a01c59f | 1102 | } |
61ae935a | 1103 | |
5923ad4b | 1104 | return 1; |
61ae935a MC |
1105 | } |
1106 | ||
8a18bc25 AG |
1107 | /* |
1108 | * Maximum size (excluding the Handshake header) of a ClientHello message, | |
1109 | * calculated as follows: | |
1110 | * | |
1111 | * 2 + # client_version | |
1112 | * 32 + # only valid length for random | |
1113 | * 1 + # length of session_id | |
1114 | * 32 + # maximum size for session_id | |
1115 | * 2 + # length of cipher suites | |
1116 | * 2^16-2 + # maximum length of cipher suites array | |
1117 | * 1 + # length of compression_methods | |
1118 | * 2^8-1 + # maximum length of compression methods | |
1119 | * 2 + # length of extensions | |
1120 | * 2^16-1 # maximum length of extensions | |
1121 | */ | |
1122 | #define CLIENT_HELLO_MAX_LENGTH 131396 | |
1123 | ||
61ae935a MC |
1124 | #define CLIENT_KEY_EXCH_MAX_LENGTH 2048 |
1125 | #define NEXT_PROTO_MAX_LENGTH 514 | |
1126 | ||
1127 | /* | |
1128 | * Returns the maximum allowed length for the current message that we are | |
1129 | * reading. Excludes the message header. | |
1130 | */ | |
eda75751 | 1131 | size_t ossl_statem_server_max_message_size(SSL *s) |
61ae935a | 1132 | { |
d6f1a6e9 | 1133 | OSSL_STATEM *st = &s->statem; |
61ae935a | 1134 | |
e8aa8b6c | 1135 | switch (st->hand_state) { |
f3b3d7f0 RS |
1136 | default: |
1137 | /* Shouldn't happen */ | |
1138 | return 0; | |
1139 | ||
61ae935a | 1140 | case TLS_ST_SR_CLNT_HELLO: |
8a18bc25 | 1141 | return CLIENT_HELLO_MAX_LENGTH; |
61ae935a | 1142 | |
ef6c191b MC |
1143 | case TLS_ST_SR_END_OF_EARLY_DATA: |
1144 | return END_OF_EARLY_DATA_MAX_LENGTH; | |
1145 | ||
61ae935a MC |
1146 | case TLS_ST_SR_CERT: |
1147 | return s->max_cert_list; | |
1148 | ||
1149 | case TLS_ST_SR_KEY_EXCH: | |
1150 | return CLIENT_KEY_EXCH_MAX_LENGTH; | |
1151 | ||
1152 | case TLS_ST_SR_CERT_VRFY: | |
1153 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
1154 | ||
1155 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
1156 | case TLS_ST_SR_NEXT_PROTO: | |
1157 | return NEXT_PROTO_MAX_LENGTH; | |
1158 | #endif | |
1159 | ||
1160 | case TLS_ST_SR_CHANGE: | |
1161 | return CCS_MAX_LENGTH; | |
1162 | ||
1163 | case TLS_ST_SR_FINISHED: | |
1164 | return FINISHED_MAX_LENGTH; | |
8cdc8c51 MC |
1165 | |
1166 | case TLS_ST_SR_KEY_UPDATE: | |
1167 | return KEY_UPDATE_MAX_LENGTH; | |
61ae935a | 1168 | } |
61ae935a MC |
1169 | } |
1170 | ||
1171 | /* | |
1172 | * Process a message that the server has received from the client. | |
1173 | */ | |
8481f583 | 1174 | MSG_PROCESS_RETURN ossl_statem_server_process_message(SSL *s, PACKET *pkt) |
61ae935a | 1175 | { |
d6f1a6e9 | 1176 | OSSL_STATEM *st = &s->statem; |
61ae935a | 1177 | |
e8aa8b6c | 1178 | switch (st->hand_state) { |
f3b3d7f0 RS |
1179 | default: |
1180 | /* Shouldn't happen */ | |
3ec8d113 MC |
1181 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1182 | SSL_F_OSSL_STATEM_SERVER_PROCESS_MESSAGE, | |
1183 | ERR_R_INTERNAL_ERROR); | |
f3b3d7f0 RS |
1184 | return MSG_PROCESS_ERROR; |
1185 | ||
61ae935a MC |
1186 | case TLS_ST_SR_CLNT_HELLO: |
1187 | return tls_process_client_hello(s, pkt); | |
1188 | ||
ef6c191b MC |
1189 | case TLS_ST_SR_END_OF_EARLY_DATA: |
1190 | return tls_process_end_of_early_data(s, pkt); | |
1191 | ||
61ae935a MC |
1192 | case TLS_ST_SR_CERT: |
1193 | return tls_process_client_certificate(s, pkt); | |
1194 | ||
1195 | case TLS_ST_SR_KEY_EXCH: | |
1196 | return tls_process_client_key_exchange(s, pkt); | |
1197 | ||
1198 | case TLS_ST_SR_CERT_VRFY: | |
1199 | return tls_process_cert_verify(s, pkt); | |
1200 | ||
1201 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
1202 | case TLS_ST_SR_NEXT_PROTO: | |
1203 | return tls_process_next_proto(s, pkt); | |
1204 | #endif | |
1205 | ||
1206 | case TLS_ST_SR_CHANGE: | |
1207 | return tls_process_change_cipher_spec(s, pkt); | |
1208 | ||
1209 | case TLS_ST_SR_FINISHED: | |
1210 | return tls_process_finished(s, pkt); | |
8cdc8c51 MC |
1211 | |
1212 | case TLS_ST_SR_KEY_UPDATE: | |
1213 | return tls_process_key_update(s, pkt); | |
1214 | ||
61ae935a | 1215 | } |
61ae935a MC |
1216 | } |
1217 | ||
1218 | /* | |
1219 | * Perform any further processing required following the receipt of a message | |
1220 | * from the client | |
1221 | */ | |
8481f583 | 1222 | WORK_STATE ossl_statem_server_post_process_message(SSL *s, WORK_STATE wst) |
61ae935a | 1223 | { |
d6f1a6e9 | 1224 | OSSL_STATEM *st = &s->statem; |
61ae935a | 1225 | |
e8aa8b6c | 1226 | switch (st->hand_state) { |
f3b3d7f0 RS |
1227 | default: |
1228 | /* Shouldn't happen */ | |
3ec8d113 MC |
1229 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1230 | SSL_F_OSSL_STATEM_SERVER_POST_PROCESS_MESSAGE, | |
1231 | ERR_R_INTERNAL_ERROR); | |
f3b3d7f0 RS |
1232 | return WORK_ERROR; |
1233 | ||
61ae935a MC |
1234 | case TLS_ST_SR_CLNT_HELLO: |
1235 | return tls_post_process_client_hello(s, wst); | |
1236 | ||
1237 | case TLS_ST_SR_KEY_EXCH: | |
1238 | return tls_post_process_client_key_exchange(s, wst); | |
61ae935a | 1239 | } |
61ae935a MC |
1240 | } |
1241 | ||
edc032b5 | 1242 | #ifndef OPENSSL_NO_SRP |
29bfd5b7 MC |
1243 | /* Returns 1 on success, 0 for retryable error, -1 for fatal error */ |
1244 | static int ssl_check_srp_ext_ClientHello(SSL *s) | |
0f113f3e | 1245 | { |
29bfd5b7 MC |
1246 | int ret; |
1247 | int al = SSL_AD_UNRECOGNIZED_NAME; | |
0f113f3e | 1248 | |
555cbb32 | 1249 | if ((s->s3.tmp.new_cipher->algorithm_mkey & SSL_kSRP) && |
0f113f3e MC |
1250 | (s->srp_ctx.TLS_ext_srp_username_callback != NULL)) { |
1251 | if (s->srp_ctx.login == NULL) { | |
1252 | /* | |
1253 | * RFC 5054 says SHOULD reject, we do so if There is no srp | |
1254 | * login name | |
1255 | */ | |
29bfd5b7 MC |
1256 | SSLfatal(s, SSL_AD_UNKNOWN_PSK_IDENTITY, |
1257 | SSL_F_SSL_CHECK_SRP_EXT_CLIENTHELLO, | |
1258 | SSL_R_PSK_IDENTITY_NOT_FOUND); | |
1259 | return -1; | |
0f113f3e | 1260 | } else { |
29bfd5b7 MC |
1261 | ret = SSL_srp_server_param_with_username(s, &al); |
1262 | if (ret < 0) | |
1263 | return 0; | |
1264 | if (ret == SSL3_AL_FATAL) { | |
1265 | SSLfatal(s, al, SSL_F_SSL_CHECK_SRP_EXT_CLIENTHELLO, | |
1266 | al == SSL_AD_UNKNOWN_PSK_IDENTITY | |
1267 | ? SSL_R_PSK_IDENTITY_NOT_FOUND | |
1268 | : SSL_R_CLIENTHELLO_TLSEXT); | |
1269 | return -1; | |
1270 | } | |
0f113f3e MC |
1271 | } |
1272 | } | |
29bfd5b7 | 1273 | return 1; |
0f113f3e | 1274 | } |
edc032b5 BL |
1275 | #endif |
1276 | ||
c536b6be | 1277 | int dtls_raw_hello_verify_request(WPACKET *pkt, unsigned char *cookie, |
cb150cbc | 1278 | size_t cookie_len) |
8ba708e5 | 1279 | { |
8ba708e5 | 1280 | /* Always use DTLS 1.0 version: see RFC 6347 */ |
c536b6be MC |
1281 | if (!WPACKET_put_bytes_u16(pkt, DTLS1_VERSION) |
1282 | || !WPACKET_sub_memcpy_u8(pkt, cookie, cookie_len)) | |
1283 | return 0; | |
8ba708e5 | 1284 | |
c536b6be | 1285 | return 1; |
8ba708e5 MC |
1286 | } |
1287 | ||
7cea05dc | 1288 | int dtls_construct_hello_verify_request(SSL *s, WPACKET *pkt) |
8ba708e5 | 1289 | { |
cb150cbc | 1290 | unsigned int cookie_leni; |
8ba708e5 MC |
1291 | if (s->ctx->app_gen_cookie_cb == NULL || |
1292 | s->ctx->app_gen_cookie_cb(s, s->d1->cookie, | |
cb150cbc MC |
1293 | &cookie_leni) == 0 || |
1294 | cookie_leni > 255) { | |
f63a17d6 MC |
1295 | SSLfatal(s, SSL_AD_NO_ALERT, SSL_F_DTLS_CONSTRUCT_HELLO_VERIFY_REQUEST, |
1296 | SSL_R_COOKIE_GEN_CALLBACK_FAILURE); | |
8ba708e5 MC |
1297 | return 0; |
1298 | } | |
cb150cbc | 1299 | s->d1->cookie_len = cookie_leni; |
8ba708e5 | 1300 | |
4a01c59f MC |
1301 | if (!dtls_raw_hello_verify_request(pkt, s->d1->cookie, |
1302 | s->d1->cookie_len)) { | |
f63a17d6 MC |
1303 | SSLfatal(s, SSL_AD_NO_ALERT, SSL_F_DTLS_CONSTRUCT_HELLO_VERIFY_REQUEST, |
1304 | ERR_R_INTERNAL_ERROR); | |
c536b6be MC |
1305 | return 0; |
1306 | } | |
8ba708e5 | 1307 | |
8ba708e5 MC |
1308 | return 1; |
1309 | } | |
1310 | ||
805a2e9e MC |
1311 | #ifndef OPENSSL_NO_EC |
1312 | /*- | |
1313 | * ssl_check_for_safari attempts to fingerprint Safari using OS X | |
1314 | * SecureTransport using the TLS extension block in |hello|. | |
1315 | * Safari, since 10.6, sends exactly these extensions, in this order: | |
1316 | * SNI, | |
1317 | * elliptic_curves | |
1318 | * ec_point_formats | |
33564cb7 | 1319 | * signature_algorithms (for TLSv1.2 only) |
805a2e9e MC |
1320 | * |
1321 | * We wish to fingerprint Safari because they broke ECDHE-ECDSA support in 10.8, | |
1322 | * but they advertise support. So enabling ECDHE-ECDSA ciphers breaks them. | |
1323 | * Sadly we cannot differentiate 10.6, 10.7 and 10.8.4 (which work), from | |
1324 | * 10.8..10.8.3 (which don't work). | |
1325 | */ | |
1326 | static void ssl_check_for_safari(SSL *s, const CLIENTHELLO_MSG *hello) | |
1327 | { | |
805a2e9e MC |
1328 | static const unsigned char kSafariExtensionsBlock[] = { |
1329 | 0x00, 0x0a, /* elliptic_curves extension */ | |
1330 | 0x00, 0x08, /* 8 bytes */ | |
1331 | 0x00, 0x06, /* 6 bytes of curve ids */ | |
1332 | 0x00, 0x17, /* P-256 */ | |
1333 | 0x00, 0x18, /* P-384 */ | |
1334 | 0x00, 0x19, /* P-521 */ | |
1335 | ||
1336 | 0x00, 0x0b, /* ec_point_formats */ | |
1337 | 0x00, 0x02, /* 2 bytes */ | |
1338 | 0x01, /* 1 point format */ | |
1339 | 0x00, /* uncompressed */ | |
1340 | /* The following is only present in TLS 1.2 */ | |
1341 | 0x00, 0x0d, /* signature_algorithms */ | |
1342 | 0x00, 0x0c, /* 12 bytes */ | |
1343 | 0x00, 0x0a, /* 10 bytes */ | |
1344 | 0x05, 0x01, /* SHA-384/RSA */ | |
1345 | 0x04, 0x01, /* SHA-256/RSA */ | |
1346 | 0x02, 0x01, /* SHA-1/RSA */ | |
1347 | 0x04, 0x03, /* SHA-256/ECDSA */ | |
1348 | 0x02, 0x03, /* SHA-1/ECDSA */ | |
1349 | }; | |
805a2e9e MC |
1350 | /* Length of the common prefix (first two extensions). */ |
1351 | static const size_t kSafariCommonExtensionsLength = 18; | |
1266eefd MC |
1352 | unsigned int type; |
1353 | PACKET sni, tmppkt; | |
1354 | size_t ext_len; | |
805a2e9e MC |
1355 | |
1356 | tmppkt = hello->extensions; | |
1357 | ||
1358 | if (!PACKET_forward(&tmppkt, 2) | |
1359 | || !PACKET_get_net_2(&tmppkt, &type) | |
1360 | || !PACKET_get_length_prefixed_2(&tmppkt, &sni)) { | |
1361 | return; | |
6b473aca MC |
1362 | } |
1363 | ||
805a2e9e MC |
1364 | if (type != TLSEXT_TYPE_server_name) |
1365 | return; | |
1366 | ||
1367 | ext_len = TLS1_get_client_version(s) >= TLS1_2_VERSION ? | |
1368 | sizeof(kSafariExtensionsBlock) : kSafariCommonExtensionsLength; | |
1369 | ||
555cbb32 | 1370 | s->s3.is_probably_safari = PACKET_equal(&tmppkt, kSafariExtensionsBlock, |
805a2e9e | 1371 | ext_len); |
6b473aca | 1372 | } |
805a2e9e | 1373 | #endif /* !OPENSSL_NO_EC */ |
6b473aca | 1374 | |
be3583fa | 1375 | MSG_PROCESS_RETURN tls_process_client_hello(SSL *s, PACKET *pkt) |
e27f234a | 1376 | { |
e27f234a | 1377 | /* |cookie| will only be initialized for DTLS. */ |
1ab3836b | 1378 | PACKET session_id, compression, extensions, cookie; |
6e3ff632 | 1379 | static const unsigned char null_compression = 0; |
3faa07b5 | 1380 | CLIENTHELLO_MSG *clienthello = NULL; |
e27f234a | 1381 | |
c7f47786 MC |
1382 | /* Check if this is actually an unexpected renegotiation ClientHello */ |
1383 | if (s->renegotiate == 0 && !SSL_IS_FIRST_HANDSHAKE(s)) { | |
3faa07b5 MC |
1384 | if (!ossl_assert(!SSL_IS_TLS13(s))) { |
1385 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CLIENT_HELLO, | |
1386 | ERR_R_INTERNAL_ERROR); | |
db0f35dd TS |
1387 | goto err; |
1388 | } | |
3faa07b5 | 1389 | if ((s->options & SSL_OP_NO_RENEGOTIATION) != 0 |
555cbb32 | 1390 | || (!s->s3.send_connection_binding |
3faa07b5 MC |
1391 | && (s->options |
1392 | & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION) == 0)) { | |
1393 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_RENEGOTIATION); | |
1394 | return MSG_PROCESS_FINISHED_READING; | |
1395 | } | |
c7f47786 MC |
1396 | s->renegotiate = 1; |
1397 | s->new_session = 1; | |
1398 | } | |
1399 | ||
3faa07b5 MC |
1400 | clienthello = OPENSSL_zalloc(sizeof(*clienthello)); |
1401 | if (clienthello == NULL) { | |
1402 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CLIENT_HELLO, | |
1403 | ERR_R_INTERNAL_ERROR); | |
1404 | goto err; | |
1405 | } | |
1406 | ||
1ab3836b | 1407 | /* |
b1b4b543 | 1408 | * First, parse the raw ClientHello data into the CLIENTHELLO_MSG structure. |
1ab3836b | 1409 | */ |
6b1bb98f | 1410 | clienthello->isv2 = RECORD_LAYER_is_sslv2_record(&s->rlayer); |
bbafa47b | 1411 | PACKET_null_init(&cookie); |
1ab3836b | 1412 | |
6b1bb98f | 1413 | if (clienthello->isv2) { |
9ceb2426 | 1414 | unsigned int mt; |
b1b4b543 | 1415 | |
fc7129dc MC |
1416 | if (!SSL_IS_FIRST_HANDSHAKE(s) |
1417 | || s->hello_retry_request != SSL_HRR_NONE) { | |
f63a17d6 MC |
1418 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, |
1419 | SSL_F_TLS_PROCESS_CLIENT_HELLO, SSL_R_UNEXPECTED_MESSAGE); | |
1420 | goto err; | |
7d061fce MC |
1421 | } |
1422 | ||
32ec4153 MC |
1423 | /*- |
1424 | * An SSLv3/TLSv1 backwards-compatible CLIENT-HELLO in an SSLv2 | |
1425 | * header is sent directly on the wire, not wrapped as a TLS | |
1426 | * record. Our record layer just processes the message length and passes | |
1427 | * the rest right through. Its format is: | |
1428 | * Byte Content | |
1429 | * 0-1 msg_length - decoded by the record layer | |
1430 | * 2 msg_type - s->init_msg points here | |
1431 | * 3-4 version | |
1432 | * 5-6 cipher_spec_length | |
1433 | * 7-8 session_id_length | |
1434 | * 9-10 challenge_length | |
1435 | * ... ... | |
1436 | */ | |
1437 | ||
73999b62 | 1438 | if (!PACKET_get_1(pkt, &mt) |
a230b26e | 1439 | || mt != SSL2_MT_CLIENT_HELLO) { |
32ec4153 MC |
1440 | /* |
1441 | * Should never happen. We should have tested this in the record | |
1442 | * layer in order to have determined that this is a SSLv2 record | |
1443 | * in the first place | |
1444 | */ | |
f63a17d6 MC |
1445 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CLIENT_HELLO, |
1446 | ERR_R_INTERNAL_ERROR); | |
d45ba43d | 1447 | goto err; |
32ec4153 | 1448 | } |
32ec4153 MC |
1449 | } |
1450 | ||
6b1bb98f | 1451 | if (!PACKET_get_net_2(pkt, &clienthello->legacy_version)) { |
f63a17d6 MC |
1452 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CLIENT_HELLO, |
1453 | SSL_R_LENGTH_TOO_SHORT); | |
1ab3836b | 1454 | goto err; |
0f113f3e MC |
1455 | } |
1456 | ||
b3e2272c | 1457 | /* Parse the message and load client random. */ |
6b1bb98f | 1458 | if (clienthello->isv2) { |
32ec4153 MC |
1459 | /* |
1460 | * Handle an SSLv2 backwards compatible ClientHello | |
1461 | * Note, this is only for SSLv3+ using the backward compatible format. | |
e2994cf0 | 1462 | * Real SSLv2 is not supported, and is rejected below. |
32ec4153 | 1463 | */ |
1ab3836b | 1464 | unsigned int ciphersuite_len, session_id_len, challenge_len; |
b3e2272c | 1465 | PACKET challenge; |
0f113f3e | 1466 | |
1ab3836b | 1467 | if (!PACKET_get_net_2(pkt, &ciphersuite_len) |
a230b26e EK |
1468 | || !PACKET_get_net_2(pkt, &session_id_len) |
1469 | || !PACKET_get_net_2(pkt, &challenge_len)) { | |
f63a17d6 MC |
1470 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CLIENT_HELLO, |
1471 | SSL_R_RECORD_LENGTH_MISMATCH); | |
1472 | goto err; | |
5e9f0eeb | 1473 | } |
0f113f3e | 1474 | |
293b5ca4 | 1475 | if (session_id_len > SSL_MAX_SSL_SESSION_ID_LENGTH) { |
f63a17d6 MC |
1476 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1477 | SSL_F_TLS_PROCESS_CLIENT_HELLO, SSL_R_LENGTH_MISMATCH); | |
1478 | goto err; | |
293b5ca4 AG |
1479 | } |
1480 | ||
6b1bb98f | 1481 | if (!PACKET_get_sub_packet(pkt, &clienthello->ciphersuites, |
1ab3836b | 1482 | ciphersuite_len) |
6b1bb98f | 1483 | || !PACKET_copy_bytes(pkt, clienthello->session_id, session_id_len) |
73999b62 | 1484 | || !PACKET_get_sub_packet(pkt, &challenge, challenge_len) |
b3e2272c | 1485 | /* No extensions. */ |
73999b62 | 1486 | || PACKET_remaining(pkt) != 0) { |
f63a17d6 MC |
1487 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CLIENT_HELLO, |
1488 | SSL_R_RECORD_LENGTH_MISMATCH); | |
1489 | goto err; | |
9ceb2426 | 1490 | } |
6b1bb98f | 1491 | clienthello->session_id_len = session_id_len; |
9ceb2426 | 1492 | |
fba7b84c | 1493 | /* Load the client random and compression list. We use SSL3_RANDOM_SIZE |
6b1bb98f | 1494 | * here rather than sizeof(clienthello->random) because that is the limit |
fba7b84c | 1495 | * for SSLv3 and it is fixed. It won't change even if |
6b1bb98f | 1496 | * sizeof(clienthello->random) does. |
fba7b84c MC |
1497 | */ |
1498 | challenge_len = challenge_len > SSL3_RANDOM_SIZE | |
1499 | ? SSL3_RANDOM_SIZE : challenge_len; | |
6b1bb98f | 1500 | memset(clienthello->random, 0, SSL3_RANDOM_SIZE); |
b3e2272c | 1501 | if (!PACKET_copy_bytes(&challenge, |
6b1bb98f | 1502 | clienthello->random + SSL3_RANDOM_SIZE - |
cb21df32 DB |
1503 | challenge_len, challenge_len) |
1504 | /* Advertise only null compression. */ | |
1505 | || !PACKET_buf_init(&compression, &null_compression, 1)) { | |
f63a17d6 MC |
1506 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CLIENT_HELLO, |
1507 | ERR_R_INTERNAL_ERROR); | |
1508 | goto err; | |
9ceb2426 | 1509 | } |
b3e2272c | 1510 | |
6b1bb98f | 1511 | PACKET_null_init(&clienthello->extensions); |
0f113f3e | 1512 | } else { |
b3e2272c | 1513 | /* Regular ClientHello. */ |
6b1bb98f | 1514 | if (!PACKET_copy_bytes(pkt, clienthello->random, SSL3_RANDOM_SIZE) |
e2994cf0 | 1515 | || !PACKET_get_length_prefixed_1(pkt, &session_id) |
6b1bb98f | 1516 | || !PACKET_copy_all(&session_id, clienthello->session_id, |
e2994cf0 | 1517 | SSL_MAX_SSL_SESSION_ID_LENGTH, |
6b1bb98f | 1518 | &clienthello->session_id_len)) { |
f63a17d6 MC |
1519 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CLIENT_HELLO, |
1520 | SSL_R_LENGTH_MISMATCH); | |
1521 | goto err; | |
9ceb2426 | 1522 | } |
32ec4153 | 1523 | |
b3e2272c | 1524 | if (SSL_IS_DTLS(s)) { |
73999b62 | 1525 | if (!PACKET_get_length_prefixed_1(pkt, &cookie)) { |
f63a17d6 MC |
1526 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CLIENT_HELLO, |
1527 | SSL_R_LENGTH_MISMATCH); | |
1528 | goto err; | |
32ec4153 | 1529 | } |
6b1bb98f | 1530 | if (!PACKET_copy_all(&cookie, clienthello->dtls_cookie, |
1ab3836b | 1531 | DTLS1_COOKIE_LENGTH, |
6b1bb98f | 1532 | &clienthello->dtls_cookie_len)) { |
f63a17d6 MC |
1533 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1534 | SSL_F_TLS_PROCESS_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
1535 | goto err; | |
1ab3836b | 1536 | } |
b3e2272c EK |
1537 | /* |
1538 | * If we require cookies and this ClientHello doesn't contain one, | |
1539 | * just return since we do not want to allocate any memory yet. | |
1540 | * So check cookie length... | |
1541 | */ | |
1542 | if (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) { | |
01666a8c MC |
1543 | if (clienthello->dtls_cookie_len == 0) { |
1544 | OPENSSL_free(clienthello); | |
eb5fd03b | 1545 | return MSG_PROCESS_FINISHED_READING; |
01666a8c | 1546 | } |
b3e2272c | 1547 | } |
5e9f0eeb | 1548 | } |
0f113f3e | 1549 | |
6b1bb98f | 1550 | if (!PACKET_get_length_prefixed_2(pkt, &clienthello->ciphersuites)) { |
f63a17d6 MC |
1551 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CLIENT_HELLO, |
1552 | SSL_R_LENGTH_MISMATCH); | |
1553 | goto err; | |
1ab3836b MC |
1554 | } |
1555 | ||
4bfe1432 | 1556 | if (!PACKET_get_length_prefixed_1(pkt, &compression)) { |
f63a17d6 MC |
1557 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CLIENT_HELLO, |
1558 | SSL_R_LENGTH_MISMATCH); | |
1559 | goto err; | |
b3e2272c | 1560 | } |
1ab3836b | 1561 | |
b3e2272c | 1562 | /* Could be empty. */ |
1ab3836b | 1563 | if (PACKET_remaining(pkt) == 0) { |
6b1bb98f | 1564 | PACKET_null_init(&clienthello->extensions); |
1ab3836b | 1565 | } else { |
ef57a475 MC |
1566 | if (!PACKET_get_length_prefixed_2(pkt, &clienthello->extensions) |
1567 | || PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
1568 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CLIENT_HELLO, |
1569 | SSL_R_LENGTH_MISMATCH); | |
1570 | goto err; | |
1ab3836b MC |
1571 | } |
1572 | } | |
1573 | } | |
1574 | ||
6b1bb98f | 1575 | if (!PACKET_copy_all(&compression, clienthello->compressions, |
e2994cf0 | 1576 | MAX_COMPRESSIONS_SIZE, |
6b1bb98f | 1577 | &clienthello->compressions_len)) { |
f63a17d6 MC |
1578 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CLIENT_HELLO, |
1579 | ERR_R_INTERNAL_ERROR); | |
1580 | goto err; | |
1ab3836b MC |
1581 | } |
1582 | ||
b1b4b543 | 1583 | /* Preserve the raw extensions PACKET for later use */ |
6b1bb98f | 1584 | extensions = clienthello->extensions; |
fe874d27 | 1585 | if (!tls_collect_extensions(s, &extensions, SSL_EXT_CLIENT_HELLO, |
f63a17d6 | 1586 | &clienthello->pre_proc_exts, |
735d5b59 | 1587 | &clienthello->pre_proc_exts_len, 1)) { |
f63a17d6 MC |
1588 | /* SSLfatal already been called */ |
1589 | goto err; | |
1ab3836b | 1590 | } |
6b1bb98f | 1591 | s->clienthello = clienthello; |
1ab3836b | 1592 | |
6b1bb98f | 1593 | return MSG_PROCESS_CONTINUE_PROCESSING; |
6b1bb98f | 1594 | |
f63a17d6 | 1595 | err: |
fbaf2857 RS |
1596 | if (clienthello != NULL) |
1597 | OPENSSL_free(clienthello->pre_proc_exts); | |
6b1bb98f BK |
1598 | OPENSSL_free(clienthello); |
1599 | ||
1600 | return MSG_PROCESS_ERROR; | |
1601 | } | |
1602 | ||
f63a17d6 | 1603 | static int tls_early_post_process_client_hello(SSL *s) |
6b1bb98f BK |
1604 | { |
1605 | unsigned int j; | |
bf846a6d | 1606 | int i, al = SSL_AD_INTERNAL_ERROR; |
6b1bb98f BK |
1607 | int protverr; |
1608 | size_t loop; | |
1609 | unsigned long id; | |
1610 | #ifndef OPENSSL_NO_COMP | |
1611 | SSL_COMP *comp = NULL; | |
1612 | #endif | |
1613 | const SSL_CIPHER *c; | |
1614 | STACK_OF(SSL_CIPHER) *ciphers = NULL; | |
1615 | STACK_OF(SSL_CIPHER) *scsvs = NULL; | |
1616 | CLIENTHELLO_MSG *clienthello = s->clienthello; | |
f7f2a01d | 1617 | DOWNGRADE dgrd = DOWNGRADE_NONE; |
6b1bb98f | 1618 | |
1ab3836b | 1619 | /* Finished parsing the ClientHello, now we can start processing it */ |
a9c0d8be DB |
1620 | /* Give the ClientHello callback a crack at things */ |
1621 | if (s->ctx->client_hello_cb != NULL) { | |
a9c0d8be | 1622 | /* A failure in the ClientHello callback terminates the connection. */ |
f1b97da1 DB |
1623 | switch (s->ctx->client_hello_cb(s, &al, s->ctx->client_hello_cb_arg)) { |
1624 | case SSL_CLIENT_HELLO_SUCCESS: | |
1625 | break; | |
1626 | case SSL_CLIENT_HELLO_RETRY: | |
a9c0d8be | 1627 | s->rwstate = SSL_CLIENT_HELLO_CB; |
f1b97da1 DB |
1628 | return -1; |
1629 | case SSL_CLIENT_HELLO_ERROR: | |
1630 | default: | |
f63a17d6 MC |
1631 | SSLfatal(s, al, |
1632 | SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, | |
1633 | SSL_R_CALLBACK_FAILED); | |
f1b97da1 | 1634 | goto err; |
6b1bb98f BK |
1635 | } |
1636 | } | |
1ab3836b MC |
1637 | |
1638 | /* Set up the client_random */ | |
555cbb32 | 1639 | memcpy(s->s3.client_random, clienthello->random, SSL3_RANDOM_SIZE); |
1ab3836b MC |
1640 | |
1641 | /* Choose the version */ | |
1642 | ||
6b1bb98f BK |
1643 | if (clienthello->isv2) { |
1644 | if (clienthello->legacy_version == SSL2_VERSION | |
1645 | || (clienthello->legacy_version & 0xff00) | |
b1b4b543 MC |
1646 | != (SSL3_VERSION_MAJOR << 8)) { |
1647 | /* | |
f63a17d6 | 1648 | * This is real SSLv2 or something completely unknown. We don't |
b1b4b543 MC |
1649 | * support it. |
1650 | */ | |
f63a17d6 MC |
1651 | SSLfatal(s, SSL_AD_PROTOCOL_VERSION, |
1652 | SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, | |
1653 | SSL_R_UNKNOWN_PROTOCOL); | |
1ab3836b MC |
1654 | goto err; |
1655 | } | |
b1b4b543 | 1656 | /* SSLv3/TLS */ |
6b1bb98f | 1657 | s->client_version = clienthello->legacy_version; |
1ab3836b MC |
1658 | } |
1659 | /* | |
1660 | * Do SSL/TLS version negotiation if applicable. For DTLS we just check | |
1661 | * versions are potentially compatible. Version negotiation comes later. | |
1662 | */ | |
1663 | if (!SSL_IS_DTLS(s)) { | |
f7f2a01d | 1664 | protverr = ssl_choose_server_version(s, clienthello, &dgrd); |
1ab3836b | 1665 | } else if (s->method->version != DTLS_ANY_VERSION && |
6b1bb98f | 1666 | DTLS_VERSION_LT((int)clienthello->legacy_version, s->version)) { |
1ab3836b MC |
1667 | protverr = SSL_R_VERSION_TOO_LOW; |
1668 | } else { | |
1669 | protverr = 0; | |
1670 | } | |
1671 | ||
1672 | if (protverr) { | |
7d061fce | 1673 | if (SSL_IS_FIRST_HANDSHAKE(s)) { |
b1b4b543 | 1674 | /* like ssl3_get_record, send alert using remote version number */ |
6b1bb98f | 1675 | s->version = s->client_version = clienthello->legacy_version; |
1ab3836b | 1676 | } |
f63a17d6 MC |
1677 | SSLfatal(s, SSL_AD_PROTOCOL_VERSION, |
1678 | SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, protverr); | |
6b1bb98f | 1679 | goto err; |
b3e2272c EK |
1680 | } |
1681 | ||
635b7d3f | 1682 | /* TLSv1.3 specifies that a ClientHello must end on a record boundary */ |
9e0ac6a2 | 1683 | if (SSL_IS_TLS13(s) && RECORD_LAYER_processed_read_pending(&s->rlayer)) { |
f63a17d6 MC |
1684 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, |
1685 | SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, | |
1686 | SSL_R_NOT_ON_RECORD_BOUNDARY); | |
9e0ac6a2 MC |
1687 | goto err; |
1688 | } | |
1689 | ||
1ed65871 DB |
1690 | if (SSL_IS_DTLS(s)) { |
1691 | /* Empty cookie was already handled above by returning early. */ | |
1692 | if (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) { | |
1693 | if (s->ctx->app_verify_cookie_cb != NULL) { | |
6b1bb98f BK |
1694 | if (s->ctx->app_verify_cookie_cb(s, clienthello->dtls_cookie, |
1695 | clienthello->dtls_cookie_len) == 0) { | |
f63a17d6 MC |
1696 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
1697 | SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, | |
1698 | SSL_R_COOKIE_MISMATCH); | |
6b1bb98f | 1699 | goto err; |
1ed65871 DB |
1700 | /* else cookie verification succeeded */ |
1701 | } | |
a230b26e | 1702 | /* default verification */ |
6b1bb98f BK |
1703 | } else if (s->d1->cookie_len != clienthello->dtls_cookie_len |
1704 | || memcmp(clienthello->dtls_cookie, s->d1->cookie, | |
1ab3836b | 1705 | s->d1->cookie_len) != 0) { |
f63a17d6 MC |
1706 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
1707 | SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, | |
1708 | SSL_R_COOKIE_MISMATCH); | |
6b1bb98f | 1709 | goto err; |
1ed65871 DB |
1710 | } |
1711 | s->d1->cookie_verified = 1; | |
1712 | } | |
1713 | if (s->method->version == DTLS_ANY_VERSION) { | |
f7f2a01d | 1714 | protverr = ssl_choose_server_version(s, clienthello, &dgrd); |
1ed65871 | 1715 | if (protverr != 0) { |
1ed65871 | 1716 | s->version = s->client_version; |
f63a17d6 MC |
1717 | SSLfatal(s, SSL_AD_PROTOCOL_VERSION, |
1718 | SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, protverr); | |
6b1bb98f | 1719 | goto err; |
1ed65871 DB |
1720 | } |
1721 | } | |
1722 | } | |
1723 | ||
b3e2272c EK |
1724 | s->hit = 0; |
1725 | ||
0de6d66d | 1726 | if (!ssl_cache_cipherlist(s, &clienthello->ciphersuites, |
f63a17d6 | 1727 | clienthello->isv2) || |
0de6d66d | 1728 | !bytes_to_cipher_list(s, &clienthello->ciphersuites, &ciphers, &scsvs, |
dd5a4279 | 1729 | clienthello->isv2, 1)) { |
f63a17d6 | 1730 | /* SSLfatal() already called */ |
0de6d66d MC |
1731 | goto err; |
1732 | } | |
1733 | ||
555cbb32 | 1734 | s->s3.send_connection_binding = 0; |
0de6d66d MC |
1735 | /* Check what signalling cipher-suite values were received. */ |
1736 | if (scsvs != NULL) { | |
1737 | for(i = 0; i < sk_SSL_CIPHER_num(scsvs); i++) { | |
1738 | c = sk_SSL_CIPHER_value(scsvs, i); | |
1739 | if (SSL_CIPHER_get_id(c) == SSL3_CK_SCSV) { | |
1740 | if (s->renegotiate) { | |
1741 | /* SCSV is fatal if renegotiating */ | |
f63a17d6 MC |
1742 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
1743 | SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, | |
1744 | SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING); | |
0de6d66d MC |
1745 | goto err; |
1746 | } | |
555cbb32 | 1747 | s->s3.send_connection_binding = 1; |
0de6d66d MC |
1748 | } else if (SSL_CIPHER_get_id(c) == SSL3_CK_FALLBACK_SCSV && |
1749 | !ssl_check_version_downgrade(s)) { | |
1750 | /* | |
1751 | * This SCSV indicates that the client previously tried | |
1752 | * a higher version. We should fail if the current version | |
1753 | * is an unexpected downgrade, as that indicates that the first | |
1754 | * connection may have been tampered with in order to trigger | |
1755 | * an insecure downgrade. | |
1756 | */ | |
f63a17d6 MC |
1757 | SSLfatal(s, SSL_AD_INAPPROPRIATE_FALLBACK, |
1758 | SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, | |
1759 | SSL_R_INAPPROPRIATE_FALLBACK); | |
0de6d66d MC |
1760 | goto err; |
1761 | } | |
1762 | } | |
1763 | } | |
1764 | ||
1765 | /* For TLSv1.3 we must select the ciphersuite *before* session resumption */ | |
1766 | if (SSL_IS_TLS13(s)) { | |
1767 | const SSL_CIPHER *cipher = | |
1768 | ssl3_choose_cipher(s, ciphers, SSL_get_ciphers(s)); | |
1769 | ||
1770 | if (cipher == NULL) { | |
f63a17d6 MC |
1771 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
1772 | SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, | |
1773 | SSL_R_NO_SHARED_CIPHER); | |
0de6d66d MC |
1774 | goto err; |
1775 | } | |
fc7129dc | 1776 | if (s->hello_retry_request == SSL_HRR_PENDING |
555cbb32 TS |
1777 | && (s->s3.tmp.new_cipher == NULL |
1778 | || s->s3.tmp.new_cipher->id != cipher->id)) { | |
0de6d66d MC |
1779 | /* |
1780 | * A previous HRR picked a different ciphersuite to the one we | |
1781 | * just selected. Something must have changed. | |
1782 | */ | |
f63a17d6 MC |
1783 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1784 | SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, | |
1785 | SSL_R_BAD_CIPHER); | |
0de6d66d MC |
1786 | goto err; |
1787 | } | |
555cbb32 | 1788 | s->s3.tmp.new_cipher = cipher; |
0de6d66d MC |
1789 | } |
1790 | ||
1ab3836b | 1791 | /* We need to do this before getting the session */ |
70af3d8e | 1792 | if (!tls_parse_extension(s, TLSEXT_IDX_extended_master_secret, |
fe874d27 | 1793 | SSL_EXT_CLIENT_HELLO, |
f63a17d6 MC |
1794 | clienthello->pre_proc_exts, NULL, 0)) { |
1795 | /* SSLfatal() already called */ | |
6b1bb98f | 1796 | goto err; |
1ab3836b MC |
1797 | } |
1798 | ||
b3e2272c EK |
1799 | /* |
1800 | * We don't allow resumption in a backwards compatible ClientHello. | |
1801 | * TODO(openssl-team): in TLS1.1+, session_id MUST be empty. | |
1802 | * | |
1803 | * Versions before 0.9.7 always allow clients to resume sessions in | |
1804 | * renegotiation. 0.9.7 and later allow this by default, but optionally | |
1805 | * ignore resumption requests with flag | |
1806 | * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION (it's a new flag rather | |
1807 | * than a change to default behavior so that applications relying on | |
1808 | * this for security won't even compile against older library versions). | |
1809 | * 1.0.1 and later also have a function SSL_renegotiate_abbreviated() to | |
1810 | * request renegotiation but not a new session (s->new_session remains | |
1811 | * unset): for servers, this essentially just means that the | |
1812 | * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION setting will be | |
1813 | * ignored. | |
1814 | */ | |
6b1bb98f | 1815 | if (clienthello->isv2 || |
b3e2272c EK |
1816 | (s->new_session && |
1817 | (s->options & SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION))) { | |
f63a17d6 MC |
1818 | if (!ssl_get_new_session(s, 1)) { |
1819 | /* SSLfatal() already called */ | |
b3e2272c | 1820 | goto err; |
f63a17d6 | 1821 | } |
b3e2272c | 1822 | } else { |
f63a17d6 | 1823 | i = ssl_get_prev_session(s, clienthello); |
128ae276 | 1824 | if (i == 1) { |
b3e2272c EK |
1825 | /* previous session */ |
1826 | s->hit = 1; | |
1827 | } else if (i == -1) { | |
f63a17d6 | 1828 | /* SSLfatal() already called */ |
6b1bb98f | 1829 | goto err; |
32ec4153 | 1830 | } else { |
b3e2272c | 1831 | /* i == 0 */ |
f63a17d6 MC |
1832 | if (!ssl_get_new_session(s, 1)) { |
1833 | /* SSLfatal() already called */ | |
32ec4153 | 1834 | goto err; |
f63a17d6 | 1835 | } |
0f113f3e | 1836 | } |
b3e2272c | 1837 | } |
0f113f3e | 1838 | |
a5816a5a MC |
1839 | if (SSL_IS_TLS13(s)) { |
1840 | memcpy(s->tmp_session_id, s->clienthello->session_id, | |
1841 | s->clienthello->session_id_len); | |
1842 | s->tmp_session_id_len = s->clienthello->session_id_len; | |
1843 | } | |
1844 | ||
a055a881 | 1845 | /* |
0de6d66d MC |
1846 | * If it is a hit, check that the cipher is in the list. In TLSv1.3 we check |
1847 | * ciphersuite compatibility with the session as part of resumption. | |
a055a881 MC |
1848 | */ |
1849 | if (!SSL_IS_TLS13(s) && s->hit) { | |
b3e2272c EK |
1850 | j = 0; |
1851 | id = s->session->cipher->id; | |
d02b48c6 | 1852 | |
77359d22 RL |
1853 | OSSL_TRACE_BEGIN(TLS_CIPHER) { |
1854 | BIO_printf(trc_out, "client sent %d ciphers\n", | |
1855 | sk_SSL_CIPHER_num(ciphers)); | |
1856 | } | |
b3e2272c EK |
1857 | for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) { |
1858 | c = sk_SSL_CIPHER_value(ciphers, i); | |
77359d22 RL |
1859 | if (trc_out != NULL) |
1860 | BIO_printf(trc_out, "client [%2d of %2d]:%s\n", i, | |
1861 | sk_SSL_CIPHER_num(ciphers), SSL_CIPHER_get_name(c)); | |
b3e2272c EK |
1862 | if (c->id == id) { |
1863 | j = 1; | |
1864 | break; | |
32ec4153 | 1865 | } |
0f113f3e | 1866 | } |
b3e2272c | 1867 | if (j == 0) { |
ec30e856 | 1868 | /* |
b3e2272c EK |
1869 | * we need to have the cipher in the cipher list if we are asked |
1870 | * to reuse it | |
ec30e856 | 1871 | */ |
f63a17d6 MC |
1872 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1873 | SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, | |
1874 | SSL_R_REQUIRED_CIPHER_MISSING); | |
77359d22 | 1875 | OSSL_TRACE_CANCEL(TLS_CIPHER); |
6b1bb98f | 1876 | goto err; |
32ec4153 | 1877 | } |
77359d22 | 1878 | OSSL_TRACE_END(TLS_CIPHER); |
b3e2272c | 1879 | } |
9ceb2426 | 1880 | |
6b1bb98f BK |
1881 | for (loop = 0; loop < clienthello->compressions_len; loop++) { |
1882 | if (clienthello->compressions[loop] == 0) | |
b3e2272c | 1883 | break; |
0f113f3e | 1884 | } |
32ec4153 | 1885 | |
6b1bb98f | 1886 | if (loop >= clienthello->compressions_len) { |
b3e2272c | 1887 | /* no compress */ |
f63a17d6 MC |
1888 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
1889 | SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, | |
1890 | SSL_R_NO_COMPRESSION_SPECIFIED); | |
6b1bb98f | 1891 | goto err; |
b3e2272c | 1892 | } |
f100b031 | 1893 | |
805a2e9e MC |
1894 | #ifndef OPENSSL_NO_EC |
1895 | if (s->options & SSL_OP_SAFARI_ECDHE_ECDSA_BUG) | |
6b1bb98f | 1896 | ssl_check_for_safari(s, clienthello); |
805a2e9e MC |
1897 | #endif /* !OPENSSL_NO_EC */ |
1898 | ||
0f113f3e | 1899 | /* TLS extensions */ |
fe874d27 | 1900 | if (!tls_parse_all_extensions(s, SSL_EXT_CLIENT_HELLO, |
f63a17d6 MC |
1901 | clienthello->pre_proc_exts, NULL, 0, 1)) { |
1902 | /* SSLfatal() already called */ | |
6b1bb98f | 1903 | goto err; |
0f113f3e MC |
1904 | } |
1905 | ||
1906 | /* | |
1907 | * Check if we want to use external pre-shared secret for this handshake | |
1908 | * for not reused session only. We need to generate server_random before | |
1909 | * calling tls_session_secret_cb in order to allow SessionTicket | |
1910 | * processing to use it in key derivation. | |
1911 | */ | |
1912 | { | |
1913 | unsigned char *pos; | |
555cbb32 | 1914 | pos = s->s3.server_random; |
f7f2a01d | 1915 | if (ssl_fill_hello_random(s, 1, pos, SSL3_RANDOM_SIZE, dgrd) <= 0) { |
f63a17d6 MC |
1916 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1917 | SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, | |
1918 | ERR_R_INTERNAL_ERROR); | |
6b1bb98f | 1919 | goto err; |
0f113f3e MC |
1920 | } |
1921 | } | |
1922 | ||
0de6d66d MC |
1923 | if (!s->hit |
1924 | && s->version >= TLS1_VERSION | |
1925 | && !SSL_IS_TLS13(s) | |
1926 | && !SSL_IS_DTLS(s) | |
1927 | && s->ext.session_secret_cb) { | |
4a640fb6 | 1928 | const SSL_CIPHER *pref_cipher = NULL; |
8c1a5343 MC |
1929 | /* |
1930 | * s->session->master_key_length is a size_t, but this is an int for | |
1931 | * backwards compat reasons | |
1932 | */ | |
1933 | int master_key_length; | |
0f113f3e | 1934 | |
8c1a5343 | 1935 | master_key_length = sizeof(s->session->master_key); |
aff8c126 | 1936 | if (s->ext.session_secret_cb(s, s->session->master_key, |
8c1a5343 | 1937 | &master_key_length, ciphers, |
0f113f3e | 1938 | &pref_cipher, |
aff8c126 | 1939 | s->ext.session_secret_cb_arg) |
8c1a5343 MC |
1940 | && master_key_length > 0) { |
1941 | s->session->master_key_length = master_key_length; | |
0f113f3e | 1942 | s->hit = 1; |
eee2a6a7 | 1943 | s->peer_ciphers = ciphers; |
0f113f3e MC |
1944 | s->session->verify_result = X509_V_OK; |
1945 | ||
1946 | ciphers = NULL; | |
1947 | ||
1948 | /* check if some cipher was preferred by call back */ | |
3f4bf115 | 1949 | if (pref_cipher == NULL) |
eee2a6a7 | 1950 | pref_cipher = ssl3_choose_cipher(s, s->peer_ciphers, |
3f4bf115 | 1951 | SSL_get_ciphers(s)); |
0f113f3e | 1952 | if (pref_cipher == NULL) { |
f63a17d6 MC |
1953 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
1954 | SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, | |
1955 | SSL_R_NO_SHARED_CIPHER); | |
6b1bb98f | 1956 | goto err; |
0f113f3e MC |
1957 | } |
1958 | ||
1959 | s->session->cipher = pref_cipher; | |
25aaa98a | 1960 | sk_SSL_CIPHER_free(s->cipher_list); |
eee2a6a7 | 1961 | s->cipher_list = sk_SSL_CIPHER_dup(s->peer_ciphers); |
25aaa98a | 1962 | sk_SSL_CIPHER_free(s->cipher_list_by_id); |
eee2a6a7 | 1963 | s->cipher_list_by_id = sk_SSL_CIPHER_dup(s->peer_ciphers); |
0f113f3e MC |
1964 | } |
1965 | } | |
58ece833 | 1966 | |
0f113f3e MC |
1967 | /* |
1968 | * Worst case, we will use the NULL compression, but if we have other | |
b2ce0337 | 1969 | * options, we will now look for them. We have complen-1 compression |
0f113f3e MC |
1970 | * algorithms from the client, starting at q. |
1971 | */ | |
555cbb32 | 1972 | s->s3.tmp.new_compression = NULL; |
1fe35494 MC |
1973 | if (SSL_IS_TLS13(s)) { |
1974 | /* | |
1975 | * We already checked above that the NULL compression method appears in | |
1976 | * the list. Now we check there aren't any others (which is illegal in | |
1977 | * a TLSv1.3 ClientHello. | |
1978 | */ | |
1979 | if (clienthello->compressions_len != 1) { | |
f63a17d6 MC |
1980 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1981 | SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, | |
1982 | SSL_R_INVALID_COMPRESSION_ALGORITHM); | |
1fe35494 MC |
1983 | goto err; |
1984 | } | |
1985 | } | |
09b6c2ef | 1986 | #ifndef OPENSSL_NO_COMP |
0f113f3e | 1987 | /* This only happens if we have a cache hit */ |
1fe35494 | 1988 | else if (s->session->compress_meth != 0) { |
0f113f3e | 1989 | int m, comp_id = s->session->compress_meth; |
9ceb2426 | 1990 | unsigned int k; |
0f113f3e MC |
1991 | /* Perform sanity checks on resumed compression algorithm */ |
1992 | /* Can't disable compression */ | |
1993 | if (!ssl_allow_compression(s)) { | |
f63a17d6 MC |
1994 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
1995 | SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, | |
1996 | SSL_R_INCONSISTENT_COMPRESSION); | |
6b1bb98f | 1997 | goto err; |
0f113f3e MC |
1998 | } |
1999 | /* Look for resumed compression method */ | |
2000 | for (m = 0; m < sk_SSL_COMP_num(s->ctx->comp_methods); m++) { | |
2001 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, m); | |
2002 | if (comp_id == comp->id) { | |
555cbb32 | 2003 | s->s3.tmp.new_compression = comp; |
0f113f3e MC |
2004 | break; |
2005 | } | |
2006 | } | |
555cbb32 | 2007 | if (s->s3.tmp.new_compression == NULL) { |
f63a17d6 MC |
2008 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
2009 | SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, | |
2010 | SSL_R_INVALID_COMPRESSION_ALGORITHM); | |
6b1bb98f | 2011 | goto err; |
0f113f3e MC |
2012 | } |
2013 | /* Look for resumed method in compression list */ | |
6b1bb98f BK |
2014 | for (k = 0; k < clienthello->compressions_len; k++) { |
2015 | if (clienthello->compressions[k] == comp_id) | |
0f113f3e MC |
2016 | break; |
2017 | } | |
6b1bb98f | 2018 | if (k >= clienthello->compressions_len) { |
f63a17d6 MC |
2019 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
2020 | SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, | |
2021 | SSL_R_REQUIRED_COMPRESSION_ALGORITHM_MISSING); | |
6b1bb98f | 2022 | goto err; |
0f113f3e | 2023 | } |
c19602b5 | 2024 | } else if (s->hit) { |
0f113f3e | 2025 | comp = NULL; |
1fe35494 | 2026 | } else if (ssl_allow_compression(s) && s->ctx->comp_methods) { |
df6741c9 | 2027 | /* See if we have a match */ |
9ceb2426 MC |
2028 | int m, nn, v, done = 0; |
2029 | unsigned int o; | |
0f113f3e MC |
2030 | |
2031 | nn = sk_SSL_COMP_num(s->ctx->comp_methods); | |
2032 | for (m = 0; m < nn; m++) { | |
2033 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, m); | |
2034 | v = comp->id; | |
6b1bb98f BK |
2035 | for (o = 0; o < clienthello->compressions_len; o++) { |
2036 | if (v == clienthello->compressions[o]) { | |
0f113f3e MC |
2037 | done = 1; |
2038 | break; | |
2039 | } | |
2040 | } | |
2041 | if (done) | |
2042 | break; | |
2043 | } | |
2044 | if (done) | |
555cbb32 | 2045 | s->s3.tmp.new_compression = comp; |
0f113f3e MC |
2046 | else |
2047 | comp = NULL; | |
2048 | } | |
e6f418bc | 2049 | #else |
0f113f3e MC |
2050 | /* |
2051 | * If compression is disabled we'd better not try to resume a session | |
2052 | * using compression. | |
2053 | */ | |
2054 | if (s->session->compress_meth != 0) { | |
f63a17d6 MC |
2055 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
2056 | SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, | |
2057 | SSL_R_INCONSISTENT_COMPRESSION); | |
6b1bb98f | 2058 | goto err; |
0f113f3e | 2059 | } |
09b6c2ef | 2060 | #endif |
413c4f45 | 2061 | |
0f113f3e | 2062 | /* |
eee2a6a7 | 2063 | * Given s->peer_ciphers and SSL_get_ciphers, we must pick a cipher |
0f113f3e | 2064 | */ |
d02b48c6 | 2065 | |
a055a881 | 2066 | if (!s->hit || SSL_IS_TLS13(s)) { |
eee2a6a7 MC |
2067 | sk_SSL_CIPHER_free(s->peer_ciphers); |
2068 | s->peer_ciphers = ciphers; | |
0f113f3e | 2069 | if (ciphers == NULL) { |
f63a17d6 MC |
2070 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2071 | SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, | |
2072 | ERR_R_INTERNAL_ERROR); | |
6b1bb98f | 2073 | goto err; |
0f113f3e MC |
2074 | } |
2075 | ciphers = NULL; | |
69b2d393 MC |
2076 | } |
2077 | ||
2078 | if (!s->hit) { | |
2079 | #ifdef OPENSSL_NO_COMP | |
2080 | s->session->compress_meth = 0; | |
2081 | #else | |
2082 | s->session->compress_meth = (comp == NULL) ? 0 : comp->id; | |
2083 | #endif | |
6f34d7bc BK |
2084 | if (!tls1_set_server_sigalgs(s)) { |
2085 | /* SSLfatal() already called */ | |
2086 | goto err; | |
2087 | } | |
e27f234a MC |
2088 | } |
2089 | ||
2090 | sk_SSL_CIPHER_free(ciphers); | |
6b1bb98f BK |
2091 | sk_SSL_CIPHER_free(scsvs); |
2092 | OPENSSL_free(clienthello->pre_proc_exts); | |
2093 | OPENSSL_free(s->clienthello); | |
2094 | s->clienthello = NULL; | |
2095 | return 1; | |
e27f234a | 2096 | err: |
e27f234a | 2097 | sk_SSL_CIPHER_free(ciphers); |
6b1bb98f BK |
2098 | sk_SSL_CIPHER_free(scsvs); |
2099 | OPENSSL_free(clienthello->pre_proc_exts); | |
2100 | OPENSSL_free(s->clienthello); | |
2101 | s->clienthello = NULL; | |
e27f234a | 2102 | |
6b1bb98f | 2103 | return 0; |
e27f234a MC |
2104 | } |
2105 | ||
24b8e4b2 MC |
2106 | /* |
2107 | * Call the status request callback if needed. Upon success, returns 1. | |
f63a17d6 | 2108 | * Upon failure, returns 0. |
24b8e4b2 | 2109 | */ |
f63a17d6 | 2110 | static int tls_handle_status_request(SSL *s) |
24b8e4b2 | 2111 | { |
aff8c126 | 2112 | s->ext.status_expected = 0; |
24b8e4b2 MC |
2113 | |
2114 | /* | |
2115 | * If status request then ask callback what to do. Note: this must be | |
2116 | * called after servername callbacks in case the certificate has changed, | |
2117 | * and must be called after the cipher has been chosen because this may | |
2118 | * influence which certificate is sent | |
2119 | */ | |
aff8c126 RS |
2120 | if (s->ext.status_type != TLSEXT_STATUSTYPE_nothing && s->ctx != NULL |
2121 | && s->ctx->ext.status_cb != NULL) { | |
24b8e4b2 | 2122 | int ret; |
1266eefd | 2123 | |
24b8e4b2 | 2124 | /* If no certificate can't return certificate status */ |
555cbb32 | 2125 | if (s->s3.tmp.cert != NULL) { |
24b8e4b2 MC |
2126 | /* |
2127 | * Set current certificate to one we will use so SSL_get_certificate | |
2128 | * et al can pick it up. | |
2129 | */ | |
555cbb32 | 2130 | s->cert->key = s->s3.tmp.cert; |
aff8c126 | 2131 | ret = s->ctx->ext.status_cb(s, s->ctx->ext.status_arg); |
24b8e4b2 MC |
2132 | switch (ret) { |
2133 | /* We don't want to send a status request response */ | |
2134 | case SSL_TLSEXT_ERR_NOACK: | |
aff8c126 | 2135 | s->ext.status_expected = 0; |
24b8e4b2 MC |
2136 | break; |
2137 | /* status request response should be sent */ | |
2138 | case SSL_TLSEXT_ERR_OK: | |
aff8c126 RS |
2139 | if (s->ext.ocsp.resp) |
2140 | s->ext.status_expected = 1; | |
24b8e4b2 MC |
2141 | break; |
2142 | /* something bad happened */ | |
2143 | case SSL_TLSEXT_ERR_ALERT_FATAL: | |
2144 | default: | |
f63a17d6 MC |
2145 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2146 | SSL_F_TLS_HANDLE_STATUS_REQUEST, | |
2147 | SSL_R_CLIENTHELLO_TLSEXT); | |
24b8e4b2 MC |
2148 | return 0; |
2149 | } | |
2150 | } | |
2151 | } | |
2152 | ||
2153 | return 1; | |
2154 | } | |
2155 | ||
5626f634 BK |
2156 | /* |
2157 | * Call the alpn_select callback if needed. Upon success, returns 1. | |
29bfd5b7 | 2158 | * Upon failure, returns 0. |
5626f634 | 2159 | */ |
f63a17d6 | 2160 | int tls_handle_alpn(SSL *s) |
5626f634 BK |
2161 | { |
2162 | const unsigned char *selected = NULL; | |
2163 | unsigned char selected_len = 0; | |
2164 | ||
555cbb32 | 2165 | if (s->ctx->ext.alpn_select_cb != NULL && s->s3.alpn_proposed != NULL) { |
5626f634 | 2166 | int r = s->ctx->ext.alpn_select_cb(s, &selected, &selected_len, |
555cbb32 TS |
2167 | s->s3.alpn_proposed, |
2168 | (unsigned int)s->s3.alpn_proposed_len, | |
5626f634 BK |
2169 | s->ctx->ext.alpn_select_cb_arg); |
2170 | ||
2171 | if (r == SSL_TLSEXT_ERR_OK) { | |
555cbb32 TS |
2172 | OPENSSL_free(s->s3.alpn_selected); |
2173 | s->s3.alpn_selected = OPENSSL_memdup(selected, selected_len); | |
2174 | if (s->s3.alpn_selected == NULL) { | |
f63a17d6 MC |
2175 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_HANDLE_ALPN, |
2176 | ERR_R_INTERNAL_ERROR); | |
5626f634 BK |
2177 | return 0; |
2178 | } | |
555cbb32 | 2179 | s->s3.alpn_selected_len = selected_len; |
5626f634 BK |
2180 | #ifndef OPENSSL_NO_NEXTPROTONEG |
2181 | /* ALPN takes precedence over NPN. */ | |
555cbb32 | 2182 | s->s3.npn_seen = 0; |
5626f634 | 2183 | #endif |
630369d9 | 2184 | |
4be3a7c7 MC |
2185 | /* Check ALPN is consistent with session */ |
2186 | if (s->session->ext.alpn_selected == NULL | |
630369d9 MC |
2187 | || selected_len != s->session->ext.alpn_selected_len |
2188 | || memcmp(selected, s->session->ext.alpn_selected, | |
4be3a7c7 MC |
2189 | selected_len) != 0) { |
2190 | /* Not consistent so can't be used for early_data */ | |
630369d9 MC |
2191 | s->ext.early_data_ok = 0; |
2192 | ||
4be3a7c7 | 2193 | if (!s->hit) { |
9d5db9c9 MC |
2194 | /* |
2195 | * This is a new session and so alpn_selected should have | |
2196 | * been initialised to NULL. We should update it with the | |
2197 | * selected ALPN. | |
2198 | */ | |
2199 | if (!ossl_assert(s->session->ext.alpn_selected == NULL)) { | |
2200 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
2201 | SSL_F_TLS_HANDLE_ALPN, | |
2202 | ERR_R_INTERNAL_ERROR); | |
2203 | return 0; | |
2204 | } | |
4be3a7c7 MC |
2205 | s->session->ext.alpn_selected = OPENSSL_memdup(selected, |
2206 | selected_len); | |
2207 | if (s->session->ext.alpn_selected == NULL) { | |
f63a17d6 MC |
2208 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2209 | SSL_F_TLS_HANDLE_ALPN, | |
2210 | ERR_R_INTERNAL_ERROR); | |
4be3a7c7 MC |
2211 | return 0; |
2212 | } | |
2213 | s->session->ext.alpn_selected_len = selected_len; | |
2214 | } | |
2215 | } | |
2216 | ||
5626f634 | 2217 | return 1; |
630369d9 | 2218 | } else if (r != SSL_TLSEXT_ERR_NOACK) { |
f63a17d6 MC |
2219 | SSLfatal(s, SSL_AD_NO_APPLICATION_PROTOCOL, SSL_F_TLS_HANDLE_ALPN, |
2220 | SSL_R_NO_APPLICATION_PROTOCOL); | |
5626f634 BK |
2221 | return 0; |
2222 | } | |
630369d9 MC |
2223 | /* |
2224 | * If r == SSL_TLSEXT_ERR_NOACK then behave as if no callback was | |
2225 | * present. | |
2226 | */ | |
5626f634 BK |
2227 | } |
2228 | ||
4be3a7c7 MC |
2229 | /* Check ALPN is consistent with session */ |
2230 | if (s->session->ext.alpn_selected != NULL) { | |
2231 | /* Not consistent so can't be used for early_data */ | |
630369d9 | 2232 | s->ext.early_data_ok = 0; |
4be3a7c7 | 2233 | } |
630369d9 | 2234 | |
5626f634 BK |
2235 | return 1; |
2236 | } | |
2237 | ||
be3583fa | 2238 | WORK_STATE tls_post_process_client_hello(SSL *s, WORK_STATE wst) |
e27f234a | 2239 | { |
4a640fb6 | 2240 | const SSL_CIPHER *cipher; |
e27f234a MC |
2241 | |
2242 | if (wst == WORK_MORE_A) { | |
f63a17d6 | 2243 | int rv = tls_early_post_process_client_hello(s); |
6b1bb98f | 2244 | if (rv == 0) { |
f63a17d6 MC |
2245 | /* SSLfatal() was already called */ |
2246 | goto err; | |
6b1bb98f BK |
2247 | } |
2248 | if (rv < 0) | |
2249 | return WORK_MORE_A; | |
2250 | wst = WORK_MORE_B; | |
2251 | } | |
2252 | if (wst == WORK_MORE_B) { | |
a055a881 | 2253 | if (!s->hit || SSL_IS_TLS13(s)) { |
e27f234a | 2254 | /* Let cert callback update server certificates if required */ |
6f34d7bc BK |
2255 | if (!s->hit && s->cert->cert_cb != NULL) { |
2256 | int rv = s->cert->cert_cb(s, s->cert->cert_cb_arg); | |
2257 | if (rv == 0) { | |
2258 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
2259 | SSL_F_TLS_POST_PROCESS_CLIENT_HELLO, | |
2260 | SSL_R_CERT_CB_ERROR); | |
524006dd | 2261 | goto err; |
e27f234a | 2262 | } |
6f34d7bc BK |
2263 | if (rv < 0) { |
2264 | s->rwstate = SSL_X509_LOOKUP; | |
2265 | return WORK_MORE_B; | |
2266 | } | |
2267 | s->rwstate = SSL_NOTHING; | |
0f113f3e | 2268 | } |
e27f234a | 2269 | |
0de6d66d MC |
2270 | /* In TLSv1.3 we selected the ciphersuite before resumption */ |
2271 | if (!SSL_IS_TLS13(s)) { | |
2272 | cipher = | |
eee2a6a7 | 2273 | ssl3_choose_cipher(s, s->peer_ciphers, SSL_get_ciphers(s)); |
0de6d66d MC |
2274 | |
2275 | if (cipher == NULL) { | |
f63a17d6 MC |
2276 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
2277 | SSL_F_TLS_POST_PROCESS_CLIENT_HELLO, | |
2278 | SSL_R_NO_SHARED_CIPHER); | |
2279 | goto err; | |
0de6d66d | 2280 | } |
555cbb32 | 2281 | s->s3.tmp.new_cipher = cipher; |
11c67eea | 2282 | } |
69b2d393 | 2283 | if (!s->hit) { |
f63a17d6 MC |
2284 | if (!tls_choose_sigalg(s, 1)) { |
2285 | /* SSLfatal already called */ | |
2286 | goto err; | |
2287 | } | |
69b2d393 MC |
2288 | /* check whether we should disable session resumption */ |
2289 | if (s->not_resumable_session_cb != NULL) | |
2290 | s->session->not_resumable = | |
8acc2799 | 2291 | s->not_resumable_session_cb(s, |
555cbb32 | 2292 | ((s->s3.tmp.new_cipher->algorithm_mkey |
8acc2799 | 2293 | & (SSL_kDHE | SSL_kECDHE)) != 0)); |
69b2d393 MC |
2294 | if (s->session->not_resumable) |
2295 | /* do not send a session ticket */ | |
2296 | s->ext.ticket_expected = 0; | |
2297 | } | |
e27f234a MC |
2298 | } else { |
2299 | /* Session-id reuse */ | |
555cbb32 | 2300 | s->s3.tmp.new_cipher = s->session->cipher; |
0f113f3e | 2301 | } |
0f113f3e | 2302 | |
e27f234a MC |
2303 | /*- |
2304 | * we now have the following setup. | |
2305 | * client_random | |
60250017 | 2306 | * cipher_list - our preferred list of ciphers |
2307 | * ciphers - the clients preferred list of ciphers | |
e27f234a MC |
2308 | * compression - basically ignored right now |
2309 | * ssl version is set - sslv3 | |
2310 | * s->session - The ssl session has been setup. | |
2311 | * s->hit - session reuse flag | |
555cbb32 | 2312 | * s->s3.tmp.new_cipher - the new cipher to use. |
e27f234a | 2313 | */ |
0f113f3e | 2314 | |
24b8e4b2 MC |
2315 | /* |
2316 | * Call status_request callback if needed. Has to be done after the | |
2317 | * certificate callbacks etc above. | |
2318 | */ | |
f63a17d6 MC |
2319 | if (!tls_handle_status_request(s)) { |
2320 | /* SSLfatal() already called */ | |
2321 | goto err; | |
e27f234a | 2322 | } |
5626f634 BK |
2323 | /* |
2324 | * Call alpn_select callback if needed. Has to be done after SNI and | |
630369d9 MC |
2325 | * cipher negotiation (HTTP/2 restricts permitted ciphers). In TLSv1.3 |
2326 | * we already did this because cipher negotiation happens earlier, and | |
2327 | * we must handle ALPN before we decide whether to accept early_data. | |
5626f634 | 2328 | */ |
f63a17d6 MC |
2329 | if (!SSL_IS_TLS13(s) && !tls_handle_alpn(s)) { |
2330 | /* SSLfatal() already called */ | |
2331 | goto err; | |
5626f634 | 2332 | } |
0f113f3e | 2333 | |
6b1bb98f | 2334 | wst = WORK_MORE_C; |
e27f234a MC |
2335 | } |
2336 | #ifndef OPENSSL_NO_SRP | |
6b1bb98f | 2337 | if (wst == WORK_MORE_C) { |
e27f234a | 2338 | int ret; |
29bfd5b7 | 2339 | if ((ret = ssl_check_srp_ext_ClientHello(s)) == 0) { |
e27f234a MC |
2340 | /* |
2341 | * callback indicates further work to be done | |
2342 | */ | |
2343 | s->rwstate = SSL_X509_LOOKUP; | |
6b1bb98f | 2344 | return WORK_MORE_C; |
e27f234a | 2345 | } |
29bfd5b7 MC |
2346 | if (ret < 0) { |
2347 | /* SSLfatal() already called */ | |
f63a17d6 | 2348 | goto err; |
0f113f3e MC |
2349 | } |
2350 | } | |
e27f234a | 2351 | #endif |
0f113f3e | 2352 | |
e27f234a | 2353 | return WORK_FINISHED_STOP; |
f63a17d6 | 2354 | err: |
e27f234a MC |
2355 | return WORK_ERROR; |
2356 | } | |
2357 | ||
7cea05dc | 2358 | int tls_construct_server_hello(SSL *s, WPACKET *pkt) |
0f113f3e | 2359 | { |
f63a17d6 | 2360 | int compm; |
ec60ccc1 | 2361 | size_t sl, len; |
f2342b7a | 2362 | int version; |
a5816a5a | 2363 | unsigned char *session_id; |
fc7129dc | 2364 | int usetls13 = SSL_IS_TLS13(s) || s->hello_retry_request == SSL_HRR_PENDING; |
0f113f3e | 2365 | |
597c51bc | 2366 | version = usetls13 ? TLS1_2_VERSION : s->version; |
f2342b7a | 2367 | if (!WPACKET_put_bytes_u16(pkt, version) |
8157d44b MC |
2368 | /* |
2369 | * Random stuff. Filling of the server_random takes place in | |
2370 | * tls_process_client_hello() | |
2371 | */ | |
597c51bc | 2372 | || !WPACKET_memcpy(pkt, |
fc7129dc | 2373 | s->hello_retry_request == SSL_HRR_PENDING |
555cbb32 | 2374 | ? hrrrandom : s->s3.server_random, |
597c51bc | 2375 | SSL3_RANDOM_SIZE)) { |
f63a17d6 MC |
2376 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_SERVER_HELLO, |
2377 | ERR_R_INTERNAL_ERROR); | |
2378 | return 0; | |
8157d44b | 2379 | } |
0f113f3e | 2380 | |
e27f234a MC |
2381 | /*- |
2382 | * There are several cases for the session ID to send | |
2383 | * back in the server hello: | |
2384 | * - For session reuse from the session cache, | |
2385 | * we send back the old session ID. | |
2386 | * - If stateless session reuse (using a session ticket) | |
2387 | * is successful, we send back the client's "session ID" | |
2388 | * (which doesn't actually identify the session). | |
2389 | * - If it is a new session, we send back the new | |
2390 | * session ID. | |
2391 | * - However, if we want the new session to be single-use, | |
2392 | * we send back a 0-length session ID. | |
a5816a5a MC |
2393 | * - In TLSv1.3 we echo back the session id sent to us by the client |
2394 | * regardless | |
e27f234a MC |
2395 | * s->hit is non-zero in either case of session reuse, |
2396 | * so the following won't overwrite an ID that we're supposed | |
2397 | * to send back. | |
2398 | */ | |
2399 | if (s->session->not_resumable || | |
2400 | (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER) | |
2401 | && !s->hit)) | |
2402 | s->session->session_id_length = 0; | |
2403 | ||
597c51bc | 2404 | if (usetls13) { |
a5816a5a MC |
2405 | sl = s->tmp_session_id_len; |
2406 | session_id = s->tmp_session_id; | |
2407 | } else { | |
2408 | sl = s->session->session_id_length; | |
2409 | session_id = s->session->session_id; | |
2410 | } | |
2411 | ||
ec60ccc1 | 2412 | if (sl > sizeof(s->session->session_id)) { |
f63a17d6 MC |
2413 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_SERVER_HELLO, |
2414 | ERR_R_INTERNAL_ERROR); | |
2415 | return 0; | |
e27f234a | 2416 | } |
0f113f3e | 2417 | |
8157d44b | 2418 | /* set up the compression method */ |
09b6c2ef | 2419 | #ifdef OPENSSL_NO_COMP |
8157d44b | 2420 | compm = 0; |
09b6c2ef | 2421 | #else |
555cbb32 | 2422 | if (usetls13 || s->s3.tmp.new_compression == NULL) |
8157d44b | 2423 | compm = 0; |
e27f234a | 2424 | else |
555cbb32 | 2425 | compm = s->s3.tmp.new_compression->id; |
09b6c2ef | 2426 | #endif |
e481f9b9 | 2427 | |
426dfc9f | 2428 | if (!WPACKET_sub_memcpy_u8(pkt, session_id, sl) |
555cbb32 | 2429 | || !s->method->put_cipher_by_char(s->s3.tmp.new_cipher, pkt, &len) |
b4f001eb MC |
2430 | || !WPACKET_put_bytes_u8(pkt, compm)) { |
2431 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_SERVER_HELLO, | |
2432 | ERR_R_INTERNAL_ERROR); | |
2433 | return 0; | |
2434 | } | |
2435 | ||
2436 | if (!tls_construct_extensions(s, pkt, | |
2437 | s->hello_retry_request == SSL_HRR_PENDING | |
2438 | ? SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST | |
2439 | : (SSL_IS_TLS13(s) | |
2440 | ? SSL_EXT_TLS1_3_SERVER_HELLO | |
2441 | : SSL_EXT_TLS1_2_SERVER_HELLO), | |
2442 | NULL, 0)) { | |
f63a17d6 MC |
2443 | /* SSLfatal() already called */ |
2444 | return 0; | |
0f113f3e | 2445 | } |
d02b48c6 | 2446 | |
fc7129dc | 2447 | if (s->hello_retry_request == SSL_HRR_PENDING) { |
597c51bc MC |
2448 | /* Ditch the session. We'll create a new one next time around */ |
2449 | SSL_SESSION_free(s->session); | |
2450 | s->session = NULL; | |
2451 | s->hit = 0; | |
2452 | ||
2453 | /* | |
2454 | * Re-initialise the Transcript Hash. We're going to prepopulate it with | |
2455 | * a synthetic message_hash in place of ClientHello1. | |
2456 | */ | |
43054d3d | 2457 | if (!create_synthetic_message_hash(s, NULL, 0, NULL, 0)) { |
597c51bc MC |
2458 | /* SSLfatal() already called */ |
2459 | return 0; | |
2460 | } | |
2461 | } else if (!(s->verify_mode & SSL_VERIFY_PEER) | |
2462 | && !ssl3_digest_cached_records(s, 0)) { | |
f63a17d6 MC |
2463 | /* SSLfatal() already called */; |
2464 | return 0; | |
aff9929b MC |
2465 | } |
2466 | ||
e27f234a | 2467 | return 1; |
0f113f3e | 2468 | } |
d02b48c6 | 2469 | |
7cea05dc | 2470 | int tls_construct_server_done(SSL *s, WPACKET *pkt) |
e27f234a | 2471 | { |
555cbb32 | 2472 | if (!s->s3.tmp.cert_request) { |
5923ad4b | 2473 | if (!ssl3_digest_cached_records(s, 0)) { |
f63a17d6 | 2474 | /* SSLfatal() already called */ |
5923ad4b MC |
2475 | return 0; |
2476 | } | |
e27f234a | 2477 | } |
e27f234a MC |
2478 | return 1; |
2479 | } | |
2480 | ||
7cea05dc | 2481 | int tls_construct_server_key_exchange(SSL *s, WPACKET *pkt) |
0f113f3e | 2482 | { |
bc36ee62 | 2483 | #ifndef OPENSSL_NO_DH |
e2b420fd | 2484 | EVP_PKEY *pkdh = NULL; |
ea262260 | 2485 | #endif |
10bf4fc2 | 2486 | #ifndef OPENSSL_NO_EC |
0f113f3e | 2487 | unsigned char *encodedPoint = NULL; |
348240c6 | 2488 | size_t encodedlen = 0; |
0f113f3e | 2489 | int curve_id = 0; |
d02b48c6 | 2490 | #endif |
555cbb32 | 2491 | const SIGALG_LOOKUP *lu = s->s3.tmp.sigalg; |
f63a17d6 | 2492 | int i; |
0f113f3e | 2493 | unsigned long type; |
2ac6115d | 2494 | const BIGNUM *r[4]; |
bfb0641f | 2495 | EVP_MD_CTX *md_ctx = EVP_MD_CTX_new(); |
fe3066ee | 2496 | EVP_PKEY_CTX *pctx = NULL; |
c13d2a5b MC |
2497 | size_t paramlen, paramoffset; |
2498 | ||
5923ad4b | 2499 | if (!WPACKET_get_total_written(pkt, ¶moffset)) { |
f63a17d6 MC |
2500 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2501 | SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
2502 | goto err; | |
c13d2a5b | 2503 | } |
0f113f3e | 2504 | |
6e59a892 | 2505 | if (md_ctx == NULL) { |
f63a17d6 MC |
2506 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2507 | SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
2508 | goto err; | |
6e59a892 | 2509 | } |
0f113f3e | 2510 | |
555cbb32 | 2511 | type = s->s3.tmp.new_cipher->algorithm_mkey; |
e27f234a | 2512 | |
e27f234a | 2513 | r[0] = r[1] = r[2] = r[3] = NULL; |
85269210 | 2514 | #ifndef OPENSSL_NO_PSK |
e27f234a MC |
2515 | /* Plain PSK or RSAPSK nothing to do */ |
2516 | if (type & (SSL_kPSK | SSL_kRSAPSK)) { | |
2517 | } else | |
85269210 | 2518 | #endif /* !OPENSSL_NO_PSK */ |
bc36ee62 | 2519 | #ifndef OPENSSL_NO_DH |
e27f234a | 2520 | if (type & (SSL_kDHE | SSL_kDHEPSK)) { |
94d61512 BL |
2521 | CERT *cert = s->cert; |
2522 | ||
e2b420fd DSH |
2523 | EVP_PKEY *pkdhp = NULL; |
2524 | DH *dh; | |
2525 | ||
e27f234a | 2526 | if (s->cert->dh_tmp_auto) { |
e2b420fd DSH |
2527 | DH *dhp = ssl_get_auto_dh(s); |
2528 | pkdh = EVP_PKEY_new(); | |
2529 | if (pkdh == NULL || dhp == NULL) { | |
2530 | DH_free(dhp); | |
f63a17d6 MC |
2531 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2532 | SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, | |
2533 | ERR_R_INTERNAL_ERROR); | |
2534 | goto err; | |
0f113f3e | 2535 | } |
e2b420fd DSH |
2536 | EVP_PKEY_assign_DH(pkdh, dhp); |
2537 | pkdhp = pkdh; | |
2538 | } else { | |
2539 | pkdhp = cert->dh_tmp; | |
2540 | } | |
2541 | if ((pkdhp == NULL) && (s->cert->dh_tmp_cb != NULL)) { | |
2542 | DH *dhp = s->cert->dh_tmp_cb(s, 0, 1024); | |
2543 | pkdh = ssl_dh_to_pkey(dhp); | |
2544 | if (pkdh == NULL) { | |
f63a17d6 MC |
2545 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2546 | SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, | |
2547 | ERR_R_INTERNAL_ERROR); | |
2548 | goto err; | |
e2b420fd DSH |
2549 | } |
2550 | pkdhp = pkdh; | |
2551 | } | |
2552 | if (pkdhp == NULL) { | |
f63a17d6 MC |
2553 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2554 | SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, | |
2555 | SSL_R_MISSING_TMP_DH_KEY); | |
2556 | goto err; | |
e27f234a MC |
2557 | } |
2558 | if (!ssl_security(s, SSL_SECOP_TMP_DH, | |
e2b420fd | 2559 | EVP_PKEY_security_bits(pkdhp), 0, pkdhp)) { |
f63a17d6 MC |
2560 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
2561 | SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, | |
2562 | SSL_R_DH_KEY_TOO_SMALL); | |
2563 | goto err; | |
e27f234a | 2564 | } |
555cbb32 | 2565 | if (s->s3.tmp.pkey != NULL) { |
f63a17d6 MC |
2566 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2567 | SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, | |
2568 | ERR_R_INTERNAL_ERROR); | |
e27f234a MC |
2569 | goto err; |
2570 | } | |
0f113f3e | 2571 | |
555cbb32 TS |
2572 | s->s3.tmp.pkey = ssl_generate_pkey(pkdhp); |
2573 | if (s->s3.tmp.pkey == NULL) { | |
f63a17d6 | 2574 | /* SSLfatal() already called */ |
ffaef3f1 | 2575 | goto err; |
e27f234a | 2576 | } |
e2b420fd | 2577 | |
555cbb32 | 2578 | dh = EVP_PKEY_get0_DH(s->s3.tmp.pkey); |
a6823657 MC |
2579 | if (dh == NULL) { |
2580 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
2581 | SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, | |
2582 | ERR_R_INTERNAL_ERROR); | |
2583 | goto err; | |
2584 | } | |
e2b420fd DSH |
2585 | |
2586 | EVP_PKEY_free(pkdh); | |
2587 | pkdh = NULL; | |
2588 | ||
0aeddcfa MC |
2589 | DH_get0_pqg(dh, &r[0], NULL, &r[1]); |
2590 | DH_get0_key(dh, &r[2], NULL); | |
e27f234a | 2591 | } else |
d02b48c6 | 2592 | #endif |
10bf4fc2 | 2593 | #ifndef OPENSSL_NO_EC |
e27f234a | 2594 | if (type & (SSL_kECDHE | SSL_kECDHEPSK)) { |
e27f234a | 2595 | |
555cbb32 | 2596 | if (s->s3.tmp.pkey != NULL) { |
f63a17d6 MC |
2597 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2598 | SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, | |
2599 | ERR_R_INTERNAL_ERROR); | |
e27f234a MC |
2600 | goto err; |
2601 | } | |
2602 | ||
57be4444 | 2603 | /* Get NID of appropriate shared curve */ |
8841154a | 2604 | curve_id = tls1_shared_group(s, -2); |
57be4444 | 2605 | if (curve_id == 0) { |
f63a17d6 MC |
2606 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
2607 | SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, | |
2608 | SSL_R_UNSUPPORTED_ELLIPTIC_CURVE); | |
e27f234a MC |
2609 | goto err; |
2610 | } | |
555cbb32 | 2611 | s->s3.tmp.pkey = ssl_generate_pkey_group(s, curve_id); |
880d9d86 | 2612 | /* Generate a new key for this curve */ |
555cbb32 | 2613 | if (s->s3.tmp.pkey == NULL) { |
f63a17d6 MC |
2614 | /* SSLfatal() already called */ |
2615 | goto err; | |
57be4444 DSH |
2616 | } |
2617 | ||
880d9d86 | 2618 | /* Encode the public key. */ |
555cbb32 | 2619 | encodedlen = EVP_PKEY_get1_tls_encodedpoint(s->s3.tmp.pkey, |
ec24630a | 2620 | &encodedPoint); |
e27f234a | 2621 | if (encodedlen == 0) { |
f63a17d6 MC |
2622 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2623 | SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_R_EC_LIB); | |
e27f234a MC |
2624 | goto err; |
2625 | } | |
0f113f3e | 2626 | |
e27f234a MC |
2627 | /* |
2628 | * We'll generate the serverKeyExchange message explicitly so we | |
2629 | * can set these to NULLs | |
2630 | */ | |
2631 | r[0] = NULL; | |
2632 | r[1] = NULL; | |
2633 | r[2] = NULL; | |
2634 | r[3] = NULL; | |
2635 | } else | |
10bf4fc2 | 2636 | #endif /* !OPENSSL_NO_EC */ |
edc032b5 | 2637 | #ifndef OPENSSL_NO_SRP |
e27f234a MC |
2638 | if (type & SSL_kSRP) { |
2639 | if ((s->srp_ctx.N == NULL) || | |
2640 | (s->srp_ctx.g == NULL) || | |
2641 | (s->srp_ctx.s == NULL) || (s->srp_ctx.B == NULL)) { | |
f63a17d6 MC |
2642 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2643 | SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, | |
2644 | SSL_R_MISSING_SRP_PARAM); | |
e27f234a | 2645 | goto err; |
0f113f3e | 2646 | } |
e27f234a MC |
2647 | r[0] = s->srp_ctx.N; |
2648 | r[1] = s->srp_ctx.g; | |
2649 | r[2] = s->srp_ctx.s; | |
2650 | r[3] = s->srp_ctx.B; | |
2651 | } else | |
2652 | #endif | |
2653 | { | |
f63a17d6 MC |
2654 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2655 | SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, | |
2656 | SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); | |
2657 | goto err; | |
e27f234a | 2658 | } |
0f113f3e | 2659 | |
555cbb32 TS |
2660 | if (((s->s3.tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP)) != 0) |
2661 | || ((s->s3.tmp.new_cipher->algorithm_mkey & SSL_PSK)) != 0) { | |
f695571e DSH |
2662 | lu = NULL; |
2663 | } else if (lu == NULL) { | |
f63a17d6 MC |
2664 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
2665 | SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
2666 | goto err; | |
e27f234a | 2667 | } |
0f113f3e | 2668 | |
85269210 | 2669 | #ifndef OPENSSL_NO_PSK |
e27f234a | 2670 | if (type & SSL_PSK) { |
c13d2a5b MC |
2671 | size_t len = (s->cert->psk_identity_hint == NULL) |
2672 | ? 0 : strlen(s->cert->psk_identity_hint); | |
2673 | ||
2674 | /* | |
2675 | * It should not happen that len > PSK_MAX_IDENTITY_LEN - we already | |
2676 | * checked this when we set the identity hint - but just in case | |
2677 | */ | |
2678 | if (len > PSK_MAX_IDENTITY_LEN | |
7cea05dc | 2679 | || !WPACKET_sub_memcpy_u16(pkt, s->cert->psk_identity_hint, |
c13d2a5b | 2680 | len)) { |
f63a17d6 MC |
2681 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2682 | SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, | |
2683 | ERR_R_INTERNAL_ERROR); | |
2684 | goto err; | |
85269210 | 2685 | } |
e27f234a | 2686 | } |
85269210 DSH |
2687 | #endif |
2688 | ||
e27f234a | 2689 | for (i = 0; i < 4 && r[i] != NULL; i++) { |
c13d2a5b MC |
2690 | unsigned char *binval; |
2691 | int res; | |
2692 | ||
edc032b5 | 2693 | #ifndef OPENSSL_NO_SRP |
e27f234a | 2694 | if ((i == 2) && (type & SSL_kSRP)) { |
7cea05dc | 2695 | res = WPACKET_start_sub_packet_u8(pkt); |
e27f234a | 2696 | } else |
78a01b3f | 2697 | #endif |
7cea05dc | 2698 | res = WPACKET_start_sub_packet_u16(pkt); |
c13d2a5b MC |
2699 | |
2700 | if (!res) { | |
f63a17d6 MC |
2701 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2702 | SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, | |
2703 | ERR_R_INTERNAL_ERROR); | |
2704 | goto err; | |
c13d2a5b MC |
2705 | } |
2706 | ||
78a01b3f | 2707 | #ifndef OPENSSL_NO_DH |
a230b26e | 2708 | /*- |
78a01b3f | 2709 | * for interoperability with some versions of the Microsoft TLS |
2710 | * stack, we need to zero pad the DHE pub key to the same length | |
2711 | * as the prime | |
2712 | */ | |
2713 | if ((i == 2) && (type & (SSL_kDHE | SSL_kDHEPSK))) { | |
c13d2a5b | 2714 | size_t len = BN_num_bytes(r[0]) - BN_num_bytes(r[2]); |
ff819477 | 2715 | |
c13d2a5b | 2716 | if (len > 0) { |
7cea05dc | 2717 | if (!WPACKET_allocate_bytes(pkt, len, &binval)) { |
f63a17d6 MC |
2718 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2719 | SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, | |
2720 | ERR_R_INTERNAL_ERROR); | |
2721 | goto err; | |
c13d2a5b MC |
2722 | } |
2723 | memset(binval, 0, len); | |
78a01b3f | 2724 | } |
c13d2a5b | 2725 | } |
edc032b5 | 2726 | #endif |
7cea05dc MC |
2727 | if (!WPACKET_allocate_bytes(pkt, BN_num_bytes(r[i]), &binval) |
2728 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
2729 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2730 | SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, | |
2731 | ERR_R_INTERNAL_ERROR); | |
2732 | goto err; | |
c13d2a5b MC |
2733 | } |
2734 | ||
2735 | BN_bn2bin(r[i], binval); | |
e27f234a | 2736 | } |
d02b48c6 | 2737 | |
10bf4fc2 | 2738 | #ifndef OPENSSL_NO_EC |
e27f234a MC |
2739 | if (type & (SSL_kECDHE | SSL_kECDHEPSK)) { |
2740 | /* | |
c13d2a5b MC |
2741 | * We only support named (not generic) curves. In this situation, the |
2742 | * ServerKeyExchange message has: [1 byte CurveType], [2 byte CurveName] | |
2743 | * [1 byte length of encoded point], followed by the actual encoded | |
2744 | * point itself | |
e27f234a | 2745 | */ |
7cea05dc MC |
2746 | if (!WPACKET_put_bytes_u8(pkt, NAMED_CURVE_TYPE) |
2747 | || !WPACKET_put_bytes_u8(pkt, 0) | |
2748 | || !WPACKET_put_bytes_u8(pkt, curve_id) | |
2749 | || !WPACKET_sub_memcpy_u8(pkt, encodedPoint, encodedlen)) { | |
f63a17d6 MC |
2750 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2751 | SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, | |
2752 | ERR_R_INTERNAL_ERROR); | |
2753 | goto err; | |
c13d2a5b | 2754 | } |
e27f234a MC |
2755 | OPENSSL_free(encodedPoint); |
2756 | encodedPoint = NULL; | |
e27f234a | 2757 | } |
ea262260 BM |
2758 | #endif |
2759 | ||
e27f234a | 2760 | /* not anonymous */ |
f695571e | 2761 | if (lu != NULL) { |
555cbb32 | 2762 | EVP_PKEY *pkey = s->s3.tmp.cert->privatekey; |
72ceb6a6 DSH |
2763 | const EVP_MD *md; |
2764 | unsigned char *sigbytes1, *sigbytes2, *tbs; | |
bddbfae1 | 2765 | size_t siglen = 0, tbslen; |
f695571e | 2766 | |
b2021556 | 2767 | if (pkey == NULL || !tls1_lookup_md(lu, &md)) { |
f695571e | 2768 | /* Should never happen */ |
f63a17d6 MC |
2769 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2770 | SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, | |
2771 | ERR_R_INTERNAL_ERROR); | |
2772 | goto err; | |
f695571e | 2773 | } |
f695571e DSH |
2774 | /* Get length of the parameters we have written above */ |
2775 | if (!WPACKET_get_length(pkt, ¶mlen)) { | |
f63a17d6 MC |
2776 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2777 | SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, | |
2778 | ERR_R_INTERNAL_ERROR); | |
2779 | goto err; | |
f695571e DSH |
2780 | } |
2781 | /* send signature algorithm */ | |
f63a17d6 MC |
2782 | if (SSL_USE_SIGALGS(s) && !WPACKET_put_bytes_u16(pkt, lu->sigalg)) { |
2783 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
2784 | SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, | |
2785 | ERR_R_INTERNAL_ERROR); | |
2786 | goto err; | |
2787 | } | |
bddbfae1 MC |
2788 | |
2789 | if (EVP_DigestSignInit(md_ctx, &pctx, md, NULL, pkey) <= 0) { | |
f63a17d6 MC |
2790 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2791 | SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, | |
2792 | ERR_R_INTERNAL_ERROR); | |
2793 | goto err; | |
f695571e DSH |
2794 | } |
2795 | if (lu->sig == EVP_PKEY_RSA_PSS) { | |
2796 | if (EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) <= 0 | |
2797 | || EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, RSA_PSS_SALTLEN_DIGEST) <= 0) { | |
f63a17d6 MC |
2798 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2799 | SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, | |
2800 | ERR_R_EVP_LIB); | |
2801 | goto err; | |
0f113f3e | 2802 | } |
f695571e | 2803 | } |
72ceb6a6 DSH |
2804 | tbslen = construct_key_exchange_tbs(s, &tbs, |
2805 | s->init_buf->data + paramoffset, | |
2806 | paramlen); | |
2807 | if (tbslen == 0) { | |
f63a17d6 MC |
2808 | /* SSLfatal() already called */ |
2809 | goto err; | |
72ceb6a6 | 2810 | } |
bddbfae1 MC |
2811 | |
2812 | if (EVP_DigestSign(md_ctx, NULL, &siglen, tbs, tbslen) <=0 | |
2813 | || !WPACKET_sub_reserve_bytes_u16(pkt, siglen, &sigbytes1) | |
2814 | || EVP_DigestSign(md_ctx, sigbytes1, &siglen, tbs, tbslen) <= 0 | |
2815 | || !WPACKET_sub_allocate_bytes_u16(pkt, siglen, &sigbytes2) | |
2816 | || sigbytes1 != sigbytes2) { | |
2817 | OPENSSL_free(tbs); | |
f63a17d6 MC |
2818 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2819 | SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, | |
2820 | ERR_R_INTERNAL_ERROR); | |
2821 | goto err; | |
77d514c5 | 2822 | } |
bddbfae1 | 2823 | OPENSSL_free(tbs); |
0f113f3e MC |
2824 | } |
2825 | ||
bfb0641f | 2826 | EVP_MD_CTX_free(md_ctx); |
e27f234a | 2827 | return 1; |
0f113f3e | 2828 | err: |
e2b420fd DSH |
2829 | #ifndef OPENSSL_NO_DH |
2830 | EVP_PKEY_free(pkdh); | |
2831 | #endif | |
556efe79 | 2832 | #ifndef OPENSSL_NO_EC |
b548a1f1 | 2833 | OPENSSL_free(encodedPoint); |
ea262260 | 2834 | #endif |
bfb0641f | 2835 | EVP_MD_CTX_free(md_ctx); |
e27f234a | 2836 | return 0; |
0f113f3e | 2837 | } |
d02b48c6 | 2838 | |
7cea05dc | 2839 | int tls_construct_certificate_request(SSL *s, WPACKET *pkt) |
0f113f3e | 2840 | { |
03f44b97 | 2841 | if (SSL_IS_TLS13(s)) { |
9d75dce3 TS |
2842 | /* Send random context when doing post-handshake auth */ |
2843 | if (s->post_handshake_auth == SSL_PHA_REQUEST_PENDING) { | |
2844 | OPENSSL_free(s->pha_context); | |
2845 | s->pha_context_len = 32; | |
2846 | if ((s->pha_context = OPENSSL_malloc(s->pha_context_len)) == NULL | |
8f21260b MC |
2847 | || RAND_bytes_ex(s->ctx->libctx, s->pha_context, |
2848 | s->pha_context_len) <= 0 | |
9d75dce3 TS |
2849 | || !WPACKET_sub_memcpy_u8(pkt, s->pha_context, s->pha_context_len)) { |
2850 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
2851 | SSL_F_TLS_CONSTRUCT_CERTIFICATE_REQUEST, | |
2852 | ERR_R_INTERNAL_ERROR); | |
2853 | return 0; | |
2854 | } | |
2855 | /* reset the handshake hash back to just after the ClientFinished */ | |
2856 | if (!tls13_restore_handshake_digest_for_pha(s)) { | |
2857 | /* SSLfatal() already called */ | |
2858 | return 0; | |
2859 | } | |
2860 | } else { | |
2861 | if (!WPACKET_put_bytes_u8(pkt, 0)) { | |
2862 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
2863 | SSL_F_TLS_CONSTRUCT_CERTIFICATE_REQUEST, | |
2864 | ERR_R_INTERNAL_ERROR); | |
2865 | return 0; | |
2866 | } | |
03f44b97 | 2867 | } |
32f66107 | 2868 | |
fe874d27 MC |
2869 | if (!tls_construct_extensions(s, pkt, |
2870 | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, NULL, | |
f63a17d6 MC |
2871 | 0)) { |
2872 | /* SSLfatal() already called */ | |
2873 | return 0; | |
03f44b97 | 2874 | } |
32f66107 DSH |
2875 | goto done; |
2876 | } | |
2877 | ||
2878 | /* get the list of acceptable cert types */ | |
2879 | if (!WPACKET_start_sub_packet_u8(pkt) | |
2880 | || !ssl3_get_req_cert_type(s, pkt) || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
2881 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2882 | SSL_F_TLS_CONSTRUCT_CERTIFICATE_REQUEST, ERR_R_INTERNAL_ERROR); | |
2883 | return 0; | |
28ff8ef3 | 2884 | } |
0f113f3e | 2885 | |
e27f234a | 2886 | if (SSL_USE_SIGALGS(s)) { |
98c792d1 | 2887 | const uint16_t *psigs; |
a9669ddc | 2888 | size_t nl = tls12_get_psigalgs(s, 1, &psigs); |
703bcee0 | 2889 | |
7cea05dc | 2890 | if (!WPACKET_start_sub_packet_u16(pkt) |
8f12296e | 2891 | || !WPACKET_set_flags(pkt, WPACKET_FLAGS_NON_ZERO_LENGTH) |
7cea05dc MC |
2892 | || !tls12_copy_sigalgs(s, pkt, psigs, nl) |
2893 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
2894 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2895 | SSL_F_TLS_CONSTRUCT_CERTIFICATE_REQUEST, | |
2896 | ERR_R_INTERNAL_ERROR); | |
2897 | return 0; | |
28ff8ef3 | 2898 | } |
e27f234a | 2899 | } |
0f113f3e | 2900 | |
98732979 | 2901 | if (!construct_ca_names(s, get_ca_names(s), pkt)) { |
f63a17d6 MC |
2902 | /* SSLfatal() already called */ |
2903 | return 0; | |
28ff8ef3 | 2904 | } |
e27f234a | 2905 | |
32f66107 | 2906 | done: |
9d75dce3 | 2907 | s->certreqs_sent++; |
555cbb32 | 2908 | s->s3.tmp.cert_request = 1; |
e27f234a | 2909 | return 1; |
0f113f3e | 2910 | } |
d02b48c6 | 2911 | |
f63a17d6 | 2912 | static int tls_process_cke_psk_preamble(SSL *s, PACKET *pkt) |
e27f234a | 2913 | { |
85269210 | 2914 | #ifndef OPENSSL_NO_PSK |
0907d710 MC |
2915 | unsigned char psk[PSK_MAX_PSK_LEN]; |
2916 | size_t psklen; | |
2917 | PACKET psk_identity; | |
efcdbcbe | 2918 | |
0907d710 | 2919 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity)) { |
f63a17d6 MC |
2920 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CKE_PSK_PREAMBLE, |
2921 | SSL_R_LENGTH_MISMATCH); | |
0907d710 MC |
2922 | return 0; |
2923 | } | |
2924 | if (PACKET_remaining(&psk_identity) > PSK_MAX_IDENTITY_LEN) { | |
f63a17d6 MC |
2925 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CKE_PSK_PREAMBLE, |
2926 | SSL_R_DATA_LENGTH_TOO_LONG); | |
0907d710 MC |
2927 | return 0; |
2928 | } | |
2929 | if (s->psk_server_callback == NULL) { | |
f63a17d6 MC |
2930 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_PSK_PREAMBLE, |
2931 | SSL_R_PSK_NO_SERVER_CB); | |
0907d710 MC |
2932 | return 0; |
2933 | } | |
85269210 | 2934 | |
0907d710 | 2935 | if (!PACKET_strndup(&psk_identity, &s->session->psk_identity)) { |
f63a17d6 MC |
2936 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_PSK_PREAMBLE, |
2937 | ERR_R_INTERNAL_ERROR); | |
0907d710 MC |
2938 | return 0; |
2939 | } | |
85269210 | 2940 | |
0907d710 | 2941 | psklen = s->psk_server_callback(s, s->session->psk_identity, |
a230b26e | 2942 | psk, sizeof(psk)); |
85269210 | 2943 | |
0907d710 | 2944 | if (psklen > PSK_MAX_PSK_LEN) { |
f63a17d6 MC |
2945 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_PSK_PREAMBLE, |
2946 | ERR_R_INTERNAL_ERROR); | |
0907d710 MC |
2947 | return 0; |
2948 | } else if (psklen == 0) { | |
2949 | /* | |
2950 | * PSK related to the given identity not found | |
2951 | */ | |
f63a17d6 MC |
2952 | SSLfatal(s, SSL_AD_UNKNOWN_PSK_IDENTITY, |
2953 | SSL_F_TLS_PROCESS_CKE_PSK_PREAMBLE, | |
2954 | SSL_R_PSK_IDENTITY_NOT_FOUND); | |
0907d710 MC |
2955 | return 0; |
2956 | } | |
85269210 | 2957 | |
555cbb32 TS |
2958 | OPENSSL_free(s->s3.tmp.psk); |
2959 | s->s3.tmp.psk = OPENSSL_memdup(psk, psklen); | |
0907d710 | 2960 | OPENSSL_cleanse(psk, psklen); |
85269210 | 2961 | |
555cbb32 | 2962 | if (s->s3.tmp.psk == NULL) { |
f63a17d6 MC |
2963 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
2964 | SSL_F_TLS_PROCESS_CKE_PSK_PREAMBLE, ERR_R_MALLOC_FAILURE); | |
0907d710 | 2965 | return 0; |
85269210 | 2966 | } |
0907d710 | 2967 | |
555cbb32 | 2968 | s->s3.tmp.psklen = psklen; |
0907d710 MC |
2969 | |
2970 | return 1; | |
2971 | #else | |
2972 | /* Should never happen */ | |
f63a17d6 MC |
2973 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_PSK_PREAMBLE, |
2974 | ERR_R_INTERNAL_ERROR); | |
0907d710 | 2975 | return 0; |
85269210 | 2976 | #endif |
0907d710 MC |
2977 | } |
2978 | ||
f63a17d6 | 2979 | static int tls_process_cke_rsa(SSL *s, PACKET *pkt) |
0907d710 | 2980 | { |
bc36ee62 | 2981 | #ifndef OPENSSL_NO_RSA |
e7db9680 | 2982 | size_t outlen; |
0907d710 | 2983 | PACKET enc_premaster; |
e7db9680 | 2984 | EVP_PKEY *rsa = NULL; |
0907d710 MC |
2985 | unsigned char *rsa_decrypt = NULL; |
2986 | int ret = 0; | |
e7db9680 MC |
2987 | EVP_PKEY_CTX *ctx = NULL; |
2988 | OSSL_PARAM params[3], *p = params; | |
0907d710 | 2989 | |
e7db9680 | 2990 | rsa = s->cert->pkeys[SSL_PKEY_RSA].privatekey; |
0907d710 | 2991 | if (rsa == NULL) { |
f63a17d6 MC |
2992 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_RSA, |
2993 | SSL_R_MISSING_RSA_CERTIFICATE); | |
0907d710 MC |
2994 | return 0; |
2995 | } | |
2996 | ||
2997 | /* SSLv3 and pre-standard DTLS omit the length bytes. */ | |
2998 | if (s->version == SSL3_VERSION || s->version == DTLS1_BAD_VER) { | |
2999 | enc_premaster = *pkt; | |
3000 | } else { | |
3001 | if (!PACKET_get_length_prefixed_2(pkt, &enc_premaster) | |
3002 | || PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
3003 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CKE_RSA, |
3004 | SSL_R_LENGTH_MISMATCH); | |
0907d710 | 3005 | return 0; |
0f113f3e | 3006 | } |
0907d710 | 3007 | } |
0f113f3e | 3008 | |
e7db9680 MC |
3009 | outlen = SSL_MAX_MASTER_KEY_LENGTH; |
3010 | rsa_decrypt = OPENSSL_malloc(outlen); | |
0907d710 | 3011 | if (rsa_decrypt == NULL) { |
f63a17d6 MC |
3012 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_RSA, |
3013 | ERR_R_MALLOC_FAILURE); | |
0907d710 MC |
3014 | return 0; |
3015 | } | |
0f113f3e | 3016 | |
e7db9680 MC |
3017 | ctx = EVP_PKEY_CTX_new(rsa, NULL); |
3018 | if (ctx == NULL) { | |
f63a17d6 | 3019 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_RSA, |
e7db9680 | 3020 | ERR_R_MALLOC_FAILURE); |
0907d710 | 3021 | goto err; |
f63a17d6 | 3022 | } |
0f113f3e | 3023 | |
0907d710 | 3024 | /* |
e7db9680 MC |
3025 | * We must not leak whether a decryption failure occurs because of |
3026 | * Bleichenbacher's attack on PKCS #1 v1.5 RSA padding (see RFC 2246, | |
3027 | * section 7.4.7.1). We use the special padding type | |
3028 | * RSA_PKCS1_WITH_TLS_PADDING to do that. It will automaticaly decrypt the | |
3029 | * RSA, check the padding and check that the client version is as expected | |
3030 | * in the premaster secret. If any of that fails then the function appears | |
3031 | * to return successfully but with a random result. The call below could | |
3032 | * still fail if the input is publicly invalid. | |
3033 | * See https://tools.ietf.org/html/rfc5246#section-7.4.7.1 | |
0907d710 | 3034 | */ |
e7db9680 MC |
3035 | if (EVP_PKEY_decrypt_init(ctx) <= 0 |
3036 | || EVP_PKEY_CTX_set_rsa_padding(ctx, RSA_PKCS1_WITH_TLS_PADDING) <= 0) { | |
f63a17d6 | 3037 | SSLfatal(s, SSL_AD_DECRYPT_ERROR, SSL_F_TLS_PROCESS_CKE_RSA, |
e7db9680 | 3038 | SSL_R_DECRYPTION_FAILED); |
0907d710 | 3039 | goto err; |
f63a17d6 | 3040 | } |
20ca916d | 3041 | |
e7db9680 MC |
3042 | *p++ = OSSL_PARAM_construct_uint(OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION, |
3043 | (unsigned int *)&s->client_version); | |
3044 | if ((s->options & SSL_OP_TLS_ROLLBACK_BUG) != 0) | |
3045 | *p++ = OSSL_PARAM_construct_uint( | |
3046 | OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION, | |
3047 | (unsigned int *)&s->version); | |
3048 | *p++ = OSSL_PARAM_construct_end(); | |
5b8fa431 | 3049 | |
e7db9680 MC |
3050 | if (!EVP_PKEY_CTX_set_params(ctx, params) |
3051 | || EVP_PKEY_decrypt(ctx, rsa_decrypt, &outlen, | |
3052 | PACKET_data(&enc_premaster), | |
3053 | PACKET_remaining(&enc_premaster)) <= 0) { | |
f63a17d6 MC |
3054 | SSLfatal(s, SSL_AD_DECRYPT_ERROR, SSL_F_TLS_PROCESS_CKE_RSA, |
3055 | SSL_R_DECRYPTION_FAILED); | |
0907d710 MC |
3056 | goto err; |
3057 | } | |
0f113f3e | 3058 | |
0907d710 | 3059 | /* |
e7db9680 MC |
3060 | * This test should never fail (otherwise we should have failed above) but |
3061 | * we double check anyway. | |
0907d710 | 3062 | */ |
e7db9680 MC |
3063 | if (outlen != SSL_MAX_MASTER_KEY_LENGTH) { |
3064 | OPENSSL_cleanse(rsa_decrypt, SSL_MAX_MASTER_KEY_LENGTH); | |
3065 | SSLfatal(s, SSL_AD_DECRYPT_ERROR, SSL_F_TLS_PROCESS_CKE_RSA, | |
3066 | SSL_R_DECRYPTION_FAILED); | |
3067 | goto err; | |
0907d710 | 3068 | } |
0f113f3e | 3069 | |
e7db9680 MC |
3070 | /* Also cleanses rsa_decrypt (on success or failure) */ |
3071 | if (!ssl_generate_master_secret(s, rsa_decrypt, | |
3072 | SSL_MAX_MASTER_KEY_LENGTH, 0)) { | |
f63a17d6 | 3073 | /* SSLfatal() already called */ |
0907d710 MC |
3074 | goto err; |
3075 | } | |
0f113f3e | 3076 | |
0907d710 MC |
3077 | ret = 1; |
3078 | err: | |
3079 | OPENSSL_free(rsa_decrypt); | |
e7db9680 | 3080 | EVP_PKEY_CTX_free(ctx); |
0907d710 MC |
3081 | return ret; |
3082 | #else | |
3083 | /* Should never happen */ | |
3ec8d113 MC |
3084 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_RSA, |
3085 | ERR_R_INTERNAL_ERROR); | |
0907d710 MC |
3086 | return 0; |
3087 | #endif | |
3088 | } | |
3089 | ||
f63a17d6 | 3090 | static int tls_process_cke_dhe(SSL *s, PACKET *pkt) |
642360f9 MC |
3091 | { |
3092 | #ifndef OPENSSL_NO_DH | |
3093 | EVP_PKEY *skey = NULL; | |
3094 | DH *cdh; | |
3095 | unsigned int i; | |
3096 | BIGNUM *pub_key; | |
3097 | const unsigned char *data; | |
3098 | EVP_PKEY *ckey = NULL; | |
3099 | int ret = 0; | |
3100 | ||
31a7d80d | 3101 | if (!PACKET_get_net_2(pkt, &i) || PACKET_remaining(pkt) != i) { |
f63a17d6 | 3102 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CKE_DHE, |
642360f9 MC |
3103 | SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG); |
3104 | goto err; | |
3105 | } | |
555cbb32 | 3106 | skey = s->s3.tmp.pkey; |
642360f9 | 3107 | if (skey == NULL) { |
f63a17d6 MC |
3108 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_DHE, |
3109 | SSL_R_MISSING_TMP_DH_KEY); | |
642360f9 MC |
3110 | goto err; |
3111 | } | |
3112 | ||
3113 | if (PACKET_remaining(pkt) == 0L) { | |
f63a17d6 MC |
3114 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CKE_DHE, |
3115 | SSL_R_MISSING_TMP_DH_KEY); | |
642360f9 MC |
3116 | goto err; |
3117 | } | |
3118 | if (!PACKET_get_bytes(pkt, &data, i)) { | |
3119 | /* We already checked we have enough data */ | |
f63a17d6 MC |
3120 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_DHE, |
3121 | ERR_R_INTERNAL_ERROR); | |
642360f9 MC |
3122 | goto err; |
3123 | } | |
3124 | ckey = EVP_PKEY_new(); | |
3125 | if (ckey == NULL || EVP_PKEY_copy_parameters(ckey, skey) == 0) { | |
f63a17d6 MC |
3126 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_DHE, |
3127 | SSL_R_BN_LIB); | |
642360f9 MC |
3128 | goto err; |
3129 | } | |
b6ff436f | 3130 | |
642360f9 MC |
3131 | cdh = EVP_PKEY_get0_DH(ckey); |
3132 | pub_key = BN_bin2bn(data, i, NULL); | |
b6ff436f | 3133 | if (pub_key == NULL || cdh == NULL || !DH_set0_key(cdh, pub_key, NULL)) { |
f63a17d6 MC |
3134 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_DHE, |
3135 | ERR_R_INTERNAL_ERROR); | |
b6ff436f | 3136 | BN_free(pub_key); |
642360f9 MC |
3137 | goto err; |
3138 | } | |
3139 | ||
0f1e51ea | 3140 | if (ssl_derive(s, skey, ckey, 1) == 0) { |
f63a17d6 | 3141 | /* SSLfatal() already called */ |
642360f9 MC |
3142 | goto err; |
3143 | } | |
3144 | ||
3145 | ret = 1; | |
555cbb32 TS |
3146 | EVP_PKEY_free(s->s3.tmp.pkey); |
3147 | s->s3.tmp.pkey = NULL; | |
642360f9 MC |
3148 | err: |
3149 | EVP_PKEY_free(ckey); | |
3150 | return ret; | |
3151 | #else | |
3152 | /* Should never happen */ | |
f63a17d6 MC |
3153 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_DHE, |
3154 | ERR_R_INTERNAL_ERROR); | |
642360f9 MC |
3155 | return 0; |
3156 | #endif | |
3157 | } | |
3158 | ||
f63a17d6 | 3159 | static int tls_process_cke_ecdhe(SSL *s, PACKET *pkt) |
19ed1ec1 MC |
3160 | { |
3161 | #ifndef OPENSSL_NO_EC | |
555cbb32 | 3162 | EVP_PKEY *skey = s->s3.tmp.pkey; |
19ed1ec1 MC |
3163 | EVP_PKEY *ckey = NULL; |
3164 | int ret = 0; | |
3165 | ||
3166 | if (PACKET_remaining(pkt) == 0L) { | |
3167 | /* We don't support ECDH client auth */ | |
f63a17d6 MC |
3168 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_PROCESS_CKE_ECDHE, |
3169 | SSL_R_MISSING_TMP_ECDH_KEY); | |
19ed1ec1 MC |
3170 | goto err; |
3171 | } else { | |
3172 | unsigned int i; | |
3173 | const unsigned char *data; | |
3174 | ||
3175 | /* | |
3176 | * Get client's public key from encoded point in the | |
3177 | * ClientKeyExchange message. | |
3178 | */ | |
3179 | ||
3180 | /* Get encoded point length */ | |
fb933982 DSH |
3181 | if (!PACKET_get_1(pkt, &i) || !PACKET_get_bytes(pkt, &data, i) |
3182 | || PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
3183 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CKE_ECDHE, |
3184 | SSL_R_LENGTH_MISMATCH); | |
19ed1ec1 MC |
3185 | goto err; |
3186 | } | |
61bef9bd MA |
3187 | if (skey == NULL) { |
3188 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_ECDHE, | |
3189 | SSL_R_MISSING_TMP_ECDH_KEY); | |
3190 | goto err; | |
3191 | } | |
3192 | ||
19ed1ec1 MC |
3193 | ckey = EVP_PKEY_new(); |
3194 | if (ckey == NULL || EVP_PKEY_copy_parameters(ckey, skey) <= 0) { | |
f63a17d6 MC |
3195 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_ECDHE, |
3196 | ERR_R_EVP_LIB); | |
19ed1ec1 MC |
3197 | goto err; |
3198 | } | |
ec24630a | 3199 | if (EVP_PKEY_set1_tls_encodedpoint(ckey, data, i) == 0) { |
f63a17d6 MC |
3200 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_ECDHE, |
3201 | ERR_R_EC_LIB); | |
19ed1ec1 MC |
3202 | goto err; |
3203 | } | |
3204 | } | |
3205 | ||
0f1e51ea | 3206 | if (ssl_derive(s, skey, ckey, 1) == 0) { |
f63a17d6 | 3207 | /* SSLfatal() already called */ |
19ed1ec1 MC |
3208 | goto err; |
3209 | } | |
3210 | ||
3211 | ret = 1; | |
555cbb32 TS |
3212 | EVP_PKEY_free(s->s3.tmp.pkey); |
3213 | s->s3.tmp.pkey = NULL; | |
19ed1ec1 MC |
3214 | err: |
3215 | EVP_PKEY_free(ckey); | |
3216 | ||
3217 | return ret; | |
3218 | #else | |
3219 | /* Should never happen */ | |
f63a17d6 MC |
3220 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_ECDHE, |
3221 | ERR_R_INTERNAL_ERROR); | |
19ed1ec1 MC |
3222 | return 0; |
3223 | #endif | |
3224 | } | |
3225 | ||
f63a17d6 | 3226 | static int tls_process_cke_srp(SSL *s, PACKET *pkt) |
c437eef6 MC |
3227 | { |
3228 | #ifndef OPENSSL_NO_SRP | |
3229 | unsigned int i; | |
3230 | const unsigned char *data; | |
3231 | ||
3232 | if (!PACKET_get_net_2(pkt, &i) | |
a230b26e | 3233 | || !PACKET_get_bytes(pkt, &data, i)) { |
f63a17d6 MC |
3234 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CKE_SRP, |
3235 | SSL_R_BAD_SRP_A_LENGTH); | |
c437eef6 MC |
3236 | return 0; |
3237 | } | |
3238 | if ((s->srp_ctx.A = BN_bin2bn(data, i, NULL)) == NULL) { | |
f63a17d6 MC |
3239 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_SRP, |
3240 | ERR_R_BN_LIB); | |
c437eef6 MC |
3241 | return 0; |
3242 | } | |
a230b26e | 3243 | if (BN_ucmp(s->srp_ctx.A, s->srp_ctx.N) >= 0 || BN_is_zero(s->srp_ctx.A)) { |
f63a17d6 MC |
3244 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_CKE_SRP, |
3245 | SSL_R_BAD_SRP_PARAMETERS); | |
c437eef6 MC |
3246 | return 0; |
3247 | } | |
3248 | OPENSSL_free(s->session->srp_username); | |
3249 | s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login); | |
3250 | if (s->session->srp_username == NULL) { | |
f63a17d6 MC |
3251 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_SRP, |
3252 | ERR_R_MALLOC_FAILURE); | |
c437eef6 MC |
3253 | return 0; |
3254 | } | |
3255 | ||
3256 | if (!srp_generate_server_master_secret(s)) { | |
f63a17d6 | 3257 | /* SSLfatal() already called */ |
c437eef6 MC |
3258 | return 0; |
3259 | } | |
3260 | ||
3261 | return 1; | |
3262 | #else | |
3263 | /* Should never happen */ | |
f63a17d6 MC |
3264 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_SRP, |
3265 | ERR_R_INTERNAL_ERROR); | |
c437eef6 MC |
3266 | return 0; |
3267 | #endif | |
3268 | } | |
3269 | ||
f63a17d6 | 3270 | static int tls_process_cke_gost(SSL *s, PACKET *pkt) |
c437eef6 MC |
3271 | { |
3272 | #ifndef OPENSSL_NO_GOST | |
3273 | EVP_PKEY_CTX *pkey_ctx; | |
3274 | EVP_PKEY *client_pub_pkey = NULL, *pk = NULL; | |
3275 | unsigned char premaster_secret[32]; | |
3276 | const unsigned char *start; | |
3277 | size_t outlen = 32, inlen; | |
3278 | unsigned long alg_a; | |
4e3ee452 DB |
3279 | GOST_KX_MESSAGE *pKX = NULL; |
3280 | const unsigned char *ptr; | |
c437eef6 MC |
3281 | int ret = 0; |
3282 | ||
3283 | /* Get our certificate private key */ | |
555cbb32 | 3284 | alg_a = s->s3.tmp.new_cipher->algorithm_auth; |
c437eef6 MC |
3285 | if (alg_a & SSL_aGOST12) { |
3286 | /* | |
3287 | * New GOST ciphersuites have SSL_aGOST01 bit too | |
3288 | */ | |
3289 | pk = s->cert->pkeys[SSL_PKEY_GOST12_512].privatekey; | |
3290 | if (pk == NULL) { | |
3291 | pk = s->cert->pkeys[SSL_PKEY_GOST12_256].privatekey; | |
3292 | } | |
3293 | if (pk == NULL) { | |
3294 | pk = s->cert->pkeys[SSL_PKEY_GOST01].privatekey; | |
3295 | } | |
3296 | } else if (alg_a & SSL_aGOST01) { | |
3297 | pk = s->cert->pkeys[SSL_PKEY_GOST01].privatekey; | |
3298 | } | |
3299 | ||
3300 | pkey_ctx = EVP_PKEY_CTX_new(pk, NULL); | |
3301 | if (pkey_ctx == NULL) { | |
f63a17d6 MC |
3302 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_GOST, |
3303 | ERR_R_MALLOC_FAILURE); | |
c437eef6 MC |
3304 | return 0; |
3305 | } | |
3306 | if (EVP_PKEY_decrypt_init(pkey_ctx) <= 0) { | |
f63a17d6 MC |
3307 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_GOST, |
3308 | ERR_R_INTERNAL_ERROR); | |
c437eef6 MC |
3309 | return 0; |
3310 | } | |
3311 | /* | |
3312 | * If client certificate is present and is of the same type, maybe | |
3313 | * use it for key exchange. Don't mind errors from | |
3314 | * EVP_PKEY_derive_set_peer, because it is completely valid to use a | |
3315 | * client certificate for authorization only. | |
3316 | */ | |
3317 | client_pub_pkey = X509_get0_pubkey(s->session->peer); | |
3318 | if (client_pub_pkey) { | |
3319 | if (EVP_PKEY_derive_set_peer(pkey_ctx, client_pub_pkey) <= 0) | |
3320 | ERR_clear_error(); | |
3321 | } | |
4e3ee452 DB |
3322 | |
3323 | ptr = PACKET_data(pkt); | |
3324 | /* Some implementations provide extra data in the opaqueBlob | |
3325 | * We have nothing to do with this blob so we just skip it */ | |
3326 | pKX = d2i_GOST_KX_MESSAGE(NULL, &ptr, PACKET_remaining(pkt)); | |
3327 | if (pKX == NULL | |
3328 | || pKX->kxBlob == NULL | |
3329 | || ASN1_TYPE_get(pKX->kxBlob) != V_ASN1_SEQUENCE) { | |
3330 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CKE_GOST, | |
3331 | SSL_R_DECRYPTION_FAILED); | |
3332 | goto err; | |
c437eef6 | 3333 | } |
4e3ee452 DB |
3334 | |
3335 | if (!PACKET_forward(pkt, ptr - PACKET_data(pkt))) { | |
3336 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_GOST, | |
803cc8c7 MC |
3337 | SSL_R_DECRYPTION_FAILED); |
3338 | goto err; | |
4e3ee452 | 3339 | } |
803cc8c7 | 3340 | |
4e3ee452 DB |
3341 | if (PACKET_remaining(pkt) != 0) { |
3342 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_GOST, | |
f63a17d6 | 3343 | SSL_R_DECRYPTION_FAILED); |
c437eef6 MC |
3344 | goto err; |
3345 | } | |
4e3ee452 DB |
3346 | |
3347 | inlen = pKX->kxBlob->value.sequence->length; | |
3348 | start = pKX->kxBlob->value.sequence->data; | |
803cc8c7 | 3349 | |
f63a17d6 MC |
3350 | if (EVP_PKEY_decrypt(pkey_ctx, premaster_secret, &outlen, start, |
3351 | inlen) <= 0) { | |
3352 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CKE_GOST, | |
3353 | SSL_R_DECRYPTION_FAILED); | |
c437eef6 MC |
3354 | goto err; |
3355 | } | |
3356 | /* Generate master secret */ | |
3357 | if (!ssl_generate_master_secret(s, premaster_secret, | |
3358 | sizeof(premaster_secret), 0)) { | |
f63a17d6 | 3359 | /* SSLfatal() already called */ |
c437eef6 MC |
3360 | goto err; |
3361 | } | |
3362 | /* Check if pubkey from client certificate was used */ | |
f63a17d6 MC |
3363 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, |
3364 | NULL) > 0) | |
c437eef6 MC |
3365 | s->statem.no_cert_verify = 1; |
3366 | ||
3367 | ret = 1; | |
3368 | err: | |
3369 | EVP_PKEY_CTX_free(pkey_ctx); | |
4e3ee452 | 3370 | GOST_KX_MESSAGE_free(pKX); |
c437eef6 MC |
3371 | return ret; |
3372 | #else | |
3373 | /* Should never happen */ | |
f63a17d6 MC |
3374 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_GOST, |
3375 | ERR_R_INTERNAL_ERROR); | |
c437eef6 MC |
3376 | return 0; |
3377 | #endif | |
3378 | } | |
3379 | ||
0907d710 MC |
3380 | MSG_PROCESS_RETURN tls_process_client_key_exchange(SSL *s, PACKET *pkt) |
3381 | { | |
0907d710 MC |
3382 | unsigned long alg_k; |
3383 | ||
555cbb32 | 3384 | alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
0907d710 MC |
3385 | |
3386 | /* For PSK parse and retrieve identity, obtain PSK key */ | |
f63a17d6 MC |
3387 | if ((alg_k & SSL_PSK) && !tls_process_cke_psk_preamble(s, pkt)) { |
3388 | /* SSLfatal() already called */ | |
0907d710 | 3389 | goto err; |
f63a17d6 | 3390 | } |
0907d710 MC |
3391 | |
3392 | if (alg_k & SSL_kPSK) { | |
3393 | /* Identity extracted earlier: should be nothing left */ | |
3394 | if (PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
3395 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
3396 | SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, | |
3397 | SSL_R_LENGTH_MISMATCH); | |
9059eb71 | 3398 | goto err; |
0907d710 MC |
3399 | } |
3400 | /* PSK handled by ssl_generate_master_secret */ | |
3401 | if (!ssl_generate_master_secret(s, NULL, 0, 0)) { | |
f63a17d6 | 3402 | /* SSLfatal() already called */ |
9059eb71 | 3403 | goto err; |
69f68237 | 3404 | } |
0907d710 | 3405 | } else if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
f63a17d6 MC |
3406 | if (!tls_process_cke_rsa(s, pkt)) { |
3407 | /* SSLfatal() already called */ | |
0907d710 | 3408 | goto err; |
f63a17d6 | 3409 | } |
642360f9 | 3410 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
f63a17d6 MC |
3411 | if (!tls_process_cke_dhe(s, pkt)) { |
3412 | /* SSLfatal() already called */ | |
0f113f3e | 3413 | goto err; |
f63a17d6 | 3414 | } |
19ed1ec1 | 3415 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
f63a17d6 MC |
3416 | if (!tls_process_cke_ecdhe(s, pkt)) { |
3417 | /* SSLfatal() already called */ | |
19ed1ec1 | 3418 | goto err; |
f63a17d6 | 3419 | } |
c437eef6 | 3420 | } else if (alg_k & SSL_kSRP) { |
f63a17d6 MC |
3421 | if (!tls_process_cke_srp(s, pkt)) { |
3422 | /* SSLfatal() already called */ | |
0f113f3e | 3423 | goto err; |
f63a17d6 | 3424 | } |
c437eef6 | 3425 | } else if (alg_k & SSL_kGOST) { |
f63a17d6 MC |
3426 | if (!tls_process_cke_gost(s, pkt)) { |
3427 | /* SSLfatal() already called */ | |
0f113f3e | 3428 | goto err; |
f63a17d6 | 3429 | } |
c437eef6 | 3430 | } else { |
f63a17d6 MC |
3431 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3432 | SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, | |
3433 | SSL_R_UNKNOWN_CIPHER_TYPE); | |
9059eb71 | 3434 | goto err; |
0f113f3e MC |
3435 | } |
3436 | ||
e27f234a | 3437 | return MSG_PROCESS_CONTINUE_PROCESSING; |
0f113f3e | 3438 | err: |
85269210 | 3439 | #ifndef OPENSSL_NO_PSK |
555cbb32 TS |
3440 | OPENSSL_clear_free(s->s3.tmp.psk, s->s3.tmp.psklen); |
3441 | s->s3.tmp.psk = NULL; | |
58964a49 | 3442 | #endif |
e27f234a | 3443 | return MSG_PROCESS_ERROR; |
0f113f3e | 3444 | } |
d02b48c6 | 3445 | |
be3583fa | 3446 | WORK_STATE tls_post_process_client_key_exchange(SSL *s, WORK_STATE wst) |
94836de2 | 3447 | { |
94836de2 | 3448 | #ifndef OPENSSL_NO_SCTP |
c130dd8e MC |
3449 | if (wst == WORK_MORE_A) { |
3450 | if (SSL_IS_DTLS(s)) { | |
3451 | unsigned char sctpauthkey[64]; | |
3452 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
09d62b33 | 3453 | size_t labellen; |
c130dd8e MC |
3454 | /* |
3455 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP | |
3456 | * used. | |
3457 | */ | |
141eb8c6 MC |
3458 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
3459 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
c130dd8e | 3460 | |
09d62b33 MT |
3461 | /* Don't include the terminating zero. */ |
3462 | labellen = sizeof(labelbuffer) - 1; | |
3463 | if (s->mode & SSL_MODE_DTLS_SCTP_LABEL_LENGTH_BUG) | |
3464 | labellen += 1; | |
3465 | ||
c130dd8e | 3466 | if (SSL_export_keying_material(s, sctpauthkey, |
a230b26e | 3467 | sizeof(sctpauthkey), labelbuffer, |
09d62b33 | 3468 | labellen, NULL, 0, |
a230b26e | 3469 | 0) <= 0) { |
f63a17d6 MC |
3470 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3471 | SSL_F_TLS_POST_PROCESS_CLIENT_KEY_EXCHANGE, | |
3472 | ERR_R_INTERNAL_ERROR); | |
0fe2a0af | 3473 | return WORK_ERROR; |
c130dd8e | 3474 | } |
94836de2 | 3475 | |
c130dd8e MC |
3476 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, |
3477 | sizeof(sctpauthkey), sctpauthkey); | |
94836de2 | 3478 | } |
94836de2 MC |
3479 | } |
3480 | #endif | |
3481 | ||
149c2ef5 | 3482 | if (s->statem.no_cert_verify || !s->session->peer) { |
a230b26e EK |
3483 | /* |
3484 | * No certificate verify or no peer certificate so we no longer need | |
3485 | * the handshake_buffer | |
149c2ef5 MC |
3486 | */ |
3487 | if (!ssl3_digest_cached_records(s, 0)) { | |
f63a17d6 | 3488 | /* SSLfatal() already called */ |
149c2ef5 MC |
3489 | return WORK_ERROR; |
3490 | } | |
94836de2 | 3491 | return WORK_FINISHED_CONTINUE; |
28f4580c | 3492 | } else { |
555cbb32 | 3493 | if (!s->s3.handshake_buffer) { |
f63a17d6 MC |
3494 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3495 | SSL_F_TLS_POST_PROCESS_CLIENT_KEY_EXCHANGE, | |
3496 | ERR_R_INTERNAL_ERROR); | |
94836de2 MC |
3497 | return WORK_ERROR; |
3498 | } | |
3499 | /* | |
3500 | * For sigalgs freeze the handshake buffer. If we support | |
3501 | * extms we've done this already so this is a no-op | |
3502 | */ | |
3503 | if (!ssl3_digest_cached_records(s, 1)) { | |
f63a17d6 | 3504 | /* SSLfatal() already called */ |
94836de2 MC |
3505 | return WORK_ERROR; |
3506 | } | |
94836de2 MC |
3507 | } |
3508 | ||
3509 | return WORK_FINISHED_CONTINUE; | |
3510 | } | |
3511 | ||
be3583fa | 3512 | MSG_PROCESS_RETURN tls_process_client_certificate(SSL *s, PACKET *pkt) |
e27f234a | 3513 | { |
f63a17d6 | 3514 | int i; |
eb5fd03b | 3515 | MSG_PROCESS_RETURN ret = MSG_PROCESS_ERROR; |
e27f234a | 3516 | X509 *x = NULL; |
9d75dce3 | 3517 | unsigned long l; |
b6981744 | 3518 | const unsigned char *certstart, *certbytes; |
e27f234a | 3519 | STACK_OF(X509) *sk = NULL; |
e96e0f8e | 3520 | PACKET spkt, context; |
d805a57b | 3521 | size_t chainidx; |
9d75dce3 | 3522 | SSL_SESSION *new_sess = NULL; |
0f113f3e | 3523 | |
de9e884b MC |
3524 | /* |
3525 | * To get this far we must have read encrypted data from the client. We no | |
3526 | * longer tolerate unencrypted alerts. This value is ignored if less than | |
3527 | * TLSv1.3 | |
3528 | */ | |
3529 | s->statem.enc_read_state = ENC_READ_STATE_VALID; | |
3530 | ||
0f113f3e | 3531 | if ((sk = sk_X509_new_null()) == NULL) { |
f63a17d6 MC |
3532 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, |
3533 | ERR_R_MALLOC_FAILURE); | |
3534 | goto err; | |
0f113f3e MC |
3535 | } |
3536 | ||
9d75dce3 TS |
3537 | if (SSL_IS_TLS13(s) && (!PACKET_get_length_prefixed_1(pkt, &context) |
3538 | || (s->pha_context == NULL && PACKET_remaining(&context) != 0) | |
3539 | || (s->pha_context != NULL && | |
3540 | !PACKET_equal(&context, s->pha_context, s->pha_context_len)))) { | |
3541 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, | |
3542 | SSL_R_INVALID_CONTEXT); | |
3543 | goto err; | |
3544 | } | |
3545 | ||
3546 | if (!PACKET_get_length_prefixed_3(pkt, &spkt) | |
e96e0f8e | 3547 | || PACKET_remaining(pkt) != 0) { |
f63a17d6 MC |
3548 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, |
3549 | SSL_R_LENGTH_MISMATCH); | |
3550 | goto err; | |
0f113f3e | 3551 | } |
0bc09ecd | 3552 | |
d805a57b | 3553 | for (chainidx = 0; PACKET_remaining(&spkt) > 0; chainidx++) { |
0bc09ecd | 3554 | if (!PACKET_get_net_3(&spkt, &l) |
a230b26e | 3555 | || !PACKET_get_bytes(&spkt, &certbytes, l)) { |
f63a17d6 MC |
3556 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
3557 | SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, | |
3558 | SSL_R_CERT_LENGTH_MISMATCH); | |
3559 | goto err; | |
0f113f3e MC |
3560 | } |
3561 | ||
0bc09ecd MC |
3562 | certstart = certbytes; |
3563 | x = d2i_X509(NULL, (const unsigned char **)&certbytes, l); | |
0f113f3e | 3564 | if (x == NULL) { |
f63a17d6 MC |
3565 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
3566 | SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, ERR_R_ASN1_LIB); | |
3567 | goto err; | |
0f113f3e | 3568 | } |
0bc09ecd | 3569 | if (certbytes != (certstart + l)) { |
f63a17d6 MC |
3570 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
3571 | SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, | |
3572 | SSL_R_CERT_LENGTH_MISMATCH); | |
3573 | goto err; | |
0f113f3e | 3574 | } |
e96e0f8e MC |
3575 | |
3576 | if (SSL_IS_TLS13(s)) { | |
3577 | RAW_EXTENSION *rawexts = NULL; | |
3578 | PACKET extensions; | |
3579 | ||
3580 | if (!PACKET_get_length_prefixed_2(&spkt, &extensions)) { | |
f63a17d6 MC |
3581 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
3582 | SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, | |
3583 | SSL_R_BAD_LENGTH); | |
3584 | goto err; | |
e96e0f8e | 3585 | } |
fe874d27 MC |
3586 | if (!tls_collect_extensions(s, &extensions, |
3587 | SSL_EXT_TLS1_3_CERTIFICATE, &rawexts, | |
f63a17d6 | 3588 | NULL, chainidx == 0) |
8e1634ec | 3589 | || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE, |
f63a17d6 | 3590 | rawexts, x, chainidx, |
8e1634ec | 3591 | PACKET_remaining(&spkt) == 0)) { |
5ee289ea | 3592 | OPENSSL_free(rawexts); |
f63a17d6 | 3593 | goto err; |
5ee289ea MC |
3594 | } |
3595 | OPENSSL_free(rawexts); | |
e96e0f8e MC |
3596 | } |
3597 | ||
0f113f3e | 3598 | if (!sk_X509_push(sk, x)) { |
f63a17d6 MC |
3599 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3600 | SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, | |
3601 | ERR_R_MALLOC_FAILURE); | |
3602 | goto err; | |
0f113f3e MC |
3603 | } |
3604 | x = NULL; | |
0f113f3e MC |
3605 | } |
3606 | ||
3607 | if (sk_X509_num(sk) <= 0) { | |
3608 | /* TLS does not mind 0 certs returned */ | |
3609 | if (s->version == SSL3_VERSION) { | |
f63a17d6 MC |
3610 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
3611 | SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, | |
3612 | SSL_R_NO_CERTIFICATES_RETURNED); | |
3613 | goto err; | |
0f113f3e MC |
3614 | } |
3615 | /* Fail for TLS only if we required a certificate */ | |
3616 | else if ((s->verify_mode & SSL_VERIFY_PEER) && | |
3617 | (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) { | |
f63a17d6 MC |
3618 | SSLfatal(s, SSL_AD_CERTIFICATE_REQUIRED, |
3619 | SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, | |
3620 | SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE); | |
3621 | goto err; | |
0f113f3e MC |
3622 | } |
3623 | /* No client certificate so digest cached records */ | |
555cbb32 | 3624 | if (s->s3.handshake_buffer && !ssl3_digest_cached_records(s, 0)) { |
f63a17d6 MC |
3625 | /* SSLfatal() already called */ |
3626 | goto err; | |
0f113f3e MC |
3627 | } |
3628 | } else { | |
3629 | EVP_PKEY *pkey; | |
3630 | i = ssl_verify_cert_chain(s, sk); | |
3631 | if (i <= 0) { | |
c6d38183 | 3632 | SSLfatal(s, ssl_x509err2alert(s->verify_result), |
f63a17d6 MC |
3633 | SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, |
3634 | SSL_R_CERTIFICATE_VERIFY_FAILED); | |
3635 | goto err; | |
0f113f3e MC |
3636 | } |
3637 | if (i > 1) { | |
f63a17d6 MC |
3638 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
3639 | SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, i); | |
3640 | goto err; | |
0f113f3e | 3641 | } |
8382fd3a | 3642 | pkey = X509_get0_pubkey(sk_X509_value(sk, 0)); |
0f113f3e | 3643 | if (pkey == NULL) { |
f63a17d6 MC |
3644 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
3645 | SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, | |
3646 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); | |
3647 | goto err; | |
0f113f3e | 3648 | } |
0f113f3e MC |
3649 | } |
3650 | ||
9d75dce3 TS |
3651 | /* |
3652 | * Sessions must be immutable once they go into the session cache. Otherwise | |
3653 | * we can get multi-thread problems. Therefore we don't "update" sessions, | |
3654 | * we replace them with a duplicate. Here, we need to do this every time | |
3655 | * a new certificate is received via post-handshake authentication, as the | |
3656 | * session may have already gone into the session cache. | |
3657 | */ | |
3658 | ||
3659 | if (s->post_handshake_auth == SSL_PHA_REQUESTED) { | |
9d75dce3 TS |
3660 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { |
3661 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
3662 | SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, | |
3663 | ERR_R_MALLOC_FAILURE); | |
3664 | goto err; | |
3665 | } | |
3666 | ||
9d75dce3 TS |
3667 | SSL_SESSION_free(s->session); |
3668 | s->session = new_sess; | |
3669 | } | |
3670 | ||
222561fe | 3671 | X509_free(s->session->peer); |
0f113f3e MC |
3672 | s->session->peer = sk_X509_shift(sk); |
3673 | s->session->verify_result = s->verify_result; | |
3674 | ||
c34b0f99 DSH |
3675 | sk_X509_pop_free(s->session->peer_chain, X509_free); |
3676 | s->session->peer_chain = sk; | |
0f1e51ea MC |
3677 | |
3678 | /* | |
3679 | * Freeze the handshake buffer. For <TLS1.3 we do this after the CKE | |
3680 | * message | |
3681 | */ | |
94ed2c67 | 3682 | if (SSL_IS_TLS13(s) && !ssl3_digest_cached_records(s, 1)) { |
f63a17d6 MC |
3683 | /* SSLfatal() already called */ |
3684 | goto err; | |
0f1e51ea MC |
3685 | } |
3686 | ||
0f113f3e MC |
3687 | /* |
3688 | * Inconsistency alert: cert_chain does *not* include the peer's own | |
d4d78943 | 3689 | * certificate, while we do include it in statem_clnt.c |
0f113f3e | 3690 | */ |
0f113f3e | 3691 | sk = NULL; |
2c5dfdc3 MC |
3692 | |
3693 | /* Save the current hash state for when we receive the CertificateVerify */ | |
36ff232c MC |
3694 | if (SSL_IS_TLS13(s)) { |
3695 | if (!ssl_handshake_hash(s, s->cert_verify_hash, | |
3696 | sizeof(s->cert_verify_hash), | |
3697 | &s->cert_verify_hash_len)) { | |
3698 | /* SSLfatal() already called */ | |
3699 | goto err; | |
3700 | } | |
3701 | ||
3702 | /* Resend session tickets */ | |
3703 | s->sent_tickets = 0; | |
2c5dfdc3 MC |
3704 | } |
3705 | ||
e27f234a | 3706 | ret = MSG_PROCESS_CONTINUE_READING; |
66696478 | 3707 | |
f63a17d6 | 3708 | err: |
222561fe RS |
3709 | X509_free(x); |
3710 | sk_X509_pop_free(sk, X509_free); | |
e27f234a | 3711 | return ret; |
0f113f3e | 3712 | } |
d02b48c6 | 3713 | |
7cea05dc | 3714 | int tls_construct_server_certificate(SSL *s, WPACKET *pkt) |
e27f234a | 3715 | { |
555cbb32 | 3716 | CERT_PKEY *cpk = s->s3.tmp.cert; |
e27f234a | 3717 | |
a497cf25 | 3718 | if (cpk == NULL) { |
f63a17d6 MC |
3719 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
3720 | SSL_F_TLS_CONSTRUCT_SERVER_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
e27f234a MC |
3721 | return 0; |
3722 | } | |
3723 | ||
e96e0f8e MC |
3724 | /* |
3725 | * In TLSv1.3 the certificate chain is always preceded by a 0 length context | |
3726 | * for the server Certificate message | |
3727 | */ | |
f63a17d6 MC |
3728 | if (SSL_IS_TLS13(s) && !WPACKET_put_bytes_u8(pkt, 0)) { |
3729 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
3730 | SSL_F_TLS_CONSTRUCT_SERVER_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
3731 | return 0; | |
3732 | } | |
3733 | if (!ssl3_output_cert_chain(s, pkt, cpk)) { | |
3734 | /* SSLfatal() already called */ | |
e27f234a MC |
3735 | return 0; |
3736 | } | |
3737 | ||
3738 | return 1; | |
3739 | } | |
3740 | ||
6a11d5c5 MC |
3741 | static int create_ticket_prequel(SSL *s, WPACKET *pkt, uint32_t age_add, |
3742 | unsigned char *tick_nonce) | |
3743 | { | |
3744 | /* | |
3745 | * Ticket lifetime hint: For TLSv1.2 this is advisory only and we leave this | |
3746 | * unspecified for resumed session (for simplicity). | |
3747 | * In TLSv1.3 we reset the "time" field above, and always specify the | |
3748 | * timeout. | |
3749 | */ | |
3750 | if (!WPACKET_put_bytes_u32(pkt, | |
3751 | (s->hit && !SSL_IS_TLS13(s)) | |
3752 | ? 0 : s->session->timeout)) { | |
3753 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_CREATE_TICKET_PREQUEL, | |
3754 | ERR_R_INTERNAL_ERROR); | |
3755 | return 0; | |
3756 | } | |
3757 | ||
3758 | if (SSL_IS_TLS13(s)) { | |
3759 | if (!WPACKET_put_bytes_u32(pkt, age_add) | |
3760 | || !WPACKET_sub_memcpy_u8(pkt, tick_nonce, TICKET_NONCE_SIZE)) { | |
3761 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_CREATE_TICKET_PREQUEL, | |
3762 | ERR_R_INTERNAL_ERROR); | |
3763 | return 0; | |
3764 | } | |
3765 | } | |
3766 | ||
3767 | /* Start the sub-packet for the actual ticket data */ | |
3768 | if (!WPACKET_start_sub_packet_u16(pkt)) { | |
3769 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_CREATE_TICKET_PREQUEL, | |
3770 | ERR_R_INTERNAL_ERROR); | |
3771 | return 0; | |
3772 | } | |
3773 | ||
3774 | return 1; | |
3775 | } | |
3776 | ||
3777 | static int construct_stateless_ticket(SSL *s, WPACKET *pkt, uint32_t age_add, | |
3778 | unsigned char *tick_nonce) | |
e27f234a MC |
3779 | { |
3780 | unsigned char *senc = NULL; | |
83ae4661 | 3781 | EVP_CIPHER_CTX *ctx = NULL; |
bf7c6817 | 3782 | HMAC_CTX *hctx = NULL; |
a00d75e1 | 3783 | unsigned char *p, *encdata1, *encdata2, *macdata1, *macdata2; |
e27f234a | 3784 | const unsigned char *const_p; |
a00d75e1 | 3785 | int len, slen_full, slen, lenfinal; |
e27f234a MC |
3786 | SSL_SESSION *sess; |
3787 | unsigned int hlen; | |
222da979 | 3788 | SSL_CTX *tctx = s->session_ctx; |
e27f234a | 3789 | unsigned char iv[EVP_MAX_IV_LENGTH]; |
d139723b | 3790 | unsigned char key_name[TLSEXT_KEYNAME_LENGTH]; |
6a11d5c5 | 3791 | int iv_len, ok = 0; |
a00d75e1 | 3792 | size_t macoffset, macendoffset; |
df0fed9a | 3793 | |
e27f234a MC |
3794 | /* get session encoding length */ |
3795 | slen_full = i2d_SSL_SESSION(s->session, NULL); | |
3796 | /* | |
3797 | * Some length values are 16 bits, so forget it if session is too | |
3798 | * long | |
3799 | */ | |
3800 | if (slen_full == 0 || slen_full > 0xFF00) { | |
6cc0b3c2 MC |
3801 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_CONSTRUCT_STATELESS_TICKET, |
3802 | ERR_R_INTERNAL_ERROR); | |
f6370040 | 3803 | goto err; |
e27f234a MC |
3804 | } |
3805 | senc = OPENSSL_malloc(slen_full); | |
a71edf3b | 3806 | if (senc == NULL) { |
f63a17d6 | 3807 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
6cc0b3c2 | 3808 | SSL_F_CONSTRUCT_STATELESS_TICKET, ERR_R_MALLOC_FAILURE); |
f6370040 | 3809 | goto err; |
e27f234a | 3810 | } |
0f113f3e | 3811 | |
846ec07d | 3812 | ctx = EVP_CIPHER_CTX_new(); |
bf7c6817 | 3813 | hctx = HMAC_CTX_new(); |
83ae4661 | 3814 | if (ctx == NULL || hctx == NULL) { |
6cc0b3c2 MC |
3815 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_CONSTRUCT_STATELESS_TICKET, |
3816 | ERR_R_MALLOC_FAILURE); | |
83ae4661 MC |
3817 | goto err; |
3818 | } | |
0f113f3e | 3819 | |
e27f234a | 3820 | p = senc; |
f63a17d6 | 3821 | if (!i2d_SSL_SESSION(s->session, &p)) { |
6cc0b3c2 MC |
3822 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_CONSTRUCT_STATELESS_TICKET, |
3823 | ERR_R_INTERNAL_ERROR); | |
e27f234a | 3824 | goto err; |
f63a17d6 | 3825 | } |
687eaf27 | 3826 | |
e27f234a MC |
3827 | /* |
3828 | * create a fresh copy (not shared with other threads) to clean up | |
3829 | */ | |
3830 | const_p = senc; | |
3831 | sess = d2i_SSL_SESSION(NULL, &const_p, slen_full); | |
f63a17d6 | 3832 | if (sess == NULL) { |
6cc0b3c2 MC |
3833 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_CONSTRUCT_STATELESS_TICKET, |
3834 | ERR_R_INTERNAL_ERROR); | |
e27f234a | 3835 | goto err; |
f63a17d6 | 3836 | } |
0f113f3e | 3837 | |
e27f234a | 3838 | slen = i2d_SSL_SESSION(sess, NULL); |
f63a17d6 MC |
3839 | if (slen == 0 || slen > slen_full) { |
3840 | /* shouldn't ever happen */ | |
6cc0b3c2 MC |
3841 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_CONSTRUCT_STATELESS_TICKET, |
3842 | ERR_R_INTERNAL_ERROR); | |
e27f234a MC |
3843 | SSL_SESSION_free(sess); |
3844 | goto err; | |
3845 | } | |
3846 | p = senc; | |
3847 | if (!i2d_SSL_SESSION(sess, &p)) { | |
6cc0b3c2 MC |
3848 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_CONSTRUCT_STATELESS_TICKET, |
3849 | ERR_R_INTERNAL_ERROR); | |
e27f234a MC |
3850 | SSL_SESSION_free(sess); |
3851 | goto err; | |
3852 | } | |
3853 | SSL_SESSION_free(sess); | |
0f113f3e | 3854 | |
e27f234a MC |
3855 | /* |
3856 | * Initialize HMAC and cipher contexts. If callback present it does | |
3857 | * all the work otherwise use generated values from parent ctx. | |
3858 | */ | |
aff8c126 | 3859 | if (tctx->ext.ticket_key_cb) { |
5c753de6 | 3860 | /* if 0 is returned, write an empty ticket */ |
aff8c126 | 3861 | int ret = tctx->ext.ticket_key_cb(s, key_name, iv, ctx, |
5c753de6 TS |
3862 | hctx, 1); |
3863 | ||
3864 | if (ret == 0) { | |
a00d75e1 MC |
3865 | |
3866 | /* Put timeout and length */ | |
7cea05dc | 3867 | if (!WPACKET_put_bytes_u32(pkt, 0) |
4a01c59f | 3868 | || !WPACKET_put_bytes_u16(pkt, 0)) { |
f63a17d6 | 3869 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
6cc0b3c2 | 3870 | SSL_F_CONSTRUCT_STATELESS_TICKET, |
f63a17d6 | 3871 | ERR_R_INTERNAL_ERROR); |
5c753de6 | 3872 | goto err; |
a00d75e1 | 3873 | } |
5c753de6 TS |
3874 | OPENSSL_free(senc); |
3875 | EVP_CIPHER_CTX_free(ctx); | |
3876 | HMAC_CTX_free(hctx); | |
3877 | return 1; | |
3878 | } | |
f63a17d6 | 3879 | if (ret < 0) { |
6cc0b3c2 | 3880 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_CONSTRUCT_STATELESS_TICKET, |
f63a17d6 | 3881 | SSL_R_CALLBACK_FAILED); |
e27f234a | 3882 | goto err; |
f63a17d6 | 3883 | } |
d139723b | 3884 | iv_len = EVP_CIPHER_CTX_iv_length(ctx); |
e27f234a | 3885 | } else { |
d139723b KR |
3886 | const EVP_CIPHER *cipher = EVP_aes_256_cbc(); |
3887 | ||
3888 | iv_len = EVP_CIPHER_iv_length(cipher); | |
8f21260b | 3889 | if (RAND_bytes_ex(s->ctx->libctx, iv, iv_len) <= 0 |
f63a17d6 | 3890 | || !EVP_EncryptInit_ex(ctx, cipher, NULL, |
4bfb96f2 TS |
3891 | tctx->ext.secure->tick_aes_key, iv) |
3892 | || !HMAC_Init_ex(hctx, tctx->ext.secure->tick_hmac_key, | |
3893 | sizeof(tctx->ext.secure->tick_hmac_key), | |
f63a17d6 | 3894 | EVP_sha256(), NULL)) { |
6cc0b3c2 | 3895 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_CONSTRUCT_STATELESS_TICKET, |
f63a17d6 | 3896 | ERR_R_INTERNAL_ERROR); |
4f9fab6b | 3897 | goto err; |
f63a17d6 | 3898 | } |
aff8c126 RS |
3899 | memcpy(key_name, tctx->ext.tick_key_name, |
3900 | sizeof(tctx->ext.tick_key_name)); | |
0f113f3e MC |
3901 | } |
3902 | ||
6a11d5c5 MC |
3903 | if (!create_ticket_prequel(s, pkt, age_add, tick_nonce)) { |
3904 | /* SSLfatal() already called */ | |
3905 | goto err; | |
3906 | } | |
3907 | ||
3908 | if (!WPACKET_get_total_written(pkt, &macoffset) | |
a00d75e1 | 3909 | /* Output key name */ |
7cea05dc | 3910 | || !WPACKET_memcpy(pkt, key_name, sizeof(key_name)) |
a00d75e1 | 3911 | /* output IV */ |
7cea05dc MC |
3912 | || !WPACKET_memcpy(pkt, iv, iv_len) |
3913 | || !WPACKET_reserve_bytes(pkt, slen + EVP_MAX_BLOCK_LENGTH, | |
a00d75e1 MC |
3914 | &encdata1) |
3915 | /* Encrypt session data */ | |
3916 | || !EVP_EncryptUpdate(ctx, encdata1, &len, senc, slen) | |
7cea05dc | 3917 | || !WPACKET_allocate_bytes(pkt, len, &encdata2) |
a00d75e1 MC |
3918 | || encdata1 != encdata2 |
3919 | || !EVP_EncryptFinal(ctx, encdata1 + len, &lenfinal) | |
7cea05dc | 3920 | || !WPACKET_allocate_bytes(pkt, lenfinal, &encdata2) |
a00d75e1 MC |
3921 | || encdata1 + len != encdata2 |
3922 | || len + lenfinal > slen + EVP_MAX_BLOCK_LENGTH | |
7cea05dc | 3923 | || !WPACKET_get_total_written(pkt, &macendoffset) |
a00d75e1 MC |
3924 | || !HMAC_Update(hctx, |
3925 | (unsigned char *)s->init_buf->data + macoffset, | |
3926 | macendoffset - macoffset) | |
7cea05dc | 3927 | || !WPACKET_reserve_bytes(pkt, EVP_MAX_MD_SIZE, &macdata1) |
a00d75e1 MC |
3928 | || !HMAC_Final(hctx, macdata1, &hlen) |
3929 | || hlen > EVP_MAX_MD_SIZE | |
7cea05dc | 3930 | || !WPACKET_allocate_bytes(pkt, hlen, &macdata2) |
6a11d5c5 MC |
3931 | || macdata1 != macdata2) { |
3932 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
6cc0b3c2 | 3933 | SSL_F_CONSTRUCT_STATELESS_TICKET, ERR_R_INTERNAL_ERROR); |
6a11d5c5 MC |
3934 | goto err; |
3935 | } | |
3936 | ||
3937 | /* Close the sub-packet created by create_ticket_prequel() */ | |
3938 | if (!WPACKET_close(pkt)) { | |
6cc0b3c2 MC |
3939 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_CONSTRUCT_STATELESS_TICKET, |
3940 | ERR_R_INTERNAL_ERROR); | |
e27f234a | 3941 | goto err; |
a00d75e1 | 3942 | } |
6a11d5c5 MC |
3943 | |
3944 | ok = 1; | |
3945 | err: | |
3946 | OPENSSL_free(senc); | |
3947 | EVP_CIPHER_CTX_free(ctx); | |
3948 | HMAC_CTX_free(hctx); | |
3949 | return ok; | |
3950 | } | |
3951 | ||
6cc0b3c2 MC |
3952 | static int construct_stateful_ticket(SSL *s, WPACKET *pkt, uint32_t age_add, |
3953 | unsigned char *tick_nonce) | |
3954 | { | |
3955 | if (!create_ticket_prequel(s, pkt, age_add, tick_nonce)) { | |
3956 | /* SSLfatal() already called */ | |
3957 | return 0; | |
3958 | } | |
3959 | ||
3960 | if (!WPACKET_memcpy(pkt, s->session->session_id, | |
3961 | s->session->session_id_length) | |
3962 | || !WPACKET_close(pkt)) { | |
3963 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_CONSTRUCT_STATEFUL_TICKET, | |
3964 | ERR_R_INTERNAL_ERROR); | |
3965 | return 0; | |
3966 | } | |
3967 | ||
3968 | return 1; | |
3969 | } | |
3970 | ||
6a11d5c5 MC |
3971 | int tls_construct_new_session_ticket(SSL *s, WPACKET *pkt) |
3972 | { | |
3973 | SSL_CTX *tctx = s->session_ctx; | |
3974 | unsigned char tick_nonce[TICKET_NONCE_SIZE]; | |
3975 | union { | |
3976 | unsigned char age_add_c[sizeof(uint32_t)]; | |
3977 | uint32_t age_add; | |
3978 | } age_add_u; | |
3979 | ||
3980 | age_add_u.age_add = 0; | |
3981 | ||
3982 | if (SSL_IS_TLS13(s)) { | |
3983 | size_t i, hashlen; | |
3984 | uint64_t nonce; | |
3985 | static const unsigned char nonce_label[] = "resumption"; | |
3986 | const EVP_MD *md = ssl_handshake_md(s); | |
6a11d5c5 MC |
3987 | int hashleni = EVP_MD_size(md); |
3988 | ||
3989 | /* Ensure cast to size_t is safe */ | |
3990 | if (!ossl_assert(hashleni >= 0)) { | |
3991 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
3992 | SSL_F_TLS_CONSTRUCT_NEW_SESSION_TICKET, | |
3993 | ERR_R_INTERNAL_ERROR); | |
3994 | goto err; | |
3995 | } | |
3996 | hashlen = (size_t)hashleni; | |
3997 | ||
6a11d5c5 MC |
3998 | /* |
3999 | * If we already sent one NewSessionTicket, or we resumed then | |
4000 | * s->session may already be in a cache and so we must not modify it. | |
4001 | * Instead we need to take a copy of it and modify that. | |
4002 | */ | |
4003 | if (s->sent_tickets != 0 || s->hit) { | |
4004 | SSL_SESSION *new_sess = ssl_session_dup(s->session, 0); | |
4005 | ||
4006 | if (new_sess == NULL) { | |
4007 | /* SSLfatal already called */ | |
4008 | goto err; | |
4009 | } | |
4010 | ||
4011 | SSL_SESSION_free(s->session); | |
4012 | s->session = new_sess; | |
4013 | } | |
4014 | ||
4015 | if (!ssl_generate_session_id(s, s->session)) { | |
4016 | /* SSLfatal() already called */ | |
4017 | goto err; | |
4018 | } | |
8f21260b MC |
4019 | if (RAND_bytes_ex(s->ctx->libctx, age_add_u.age_add_c, |
4020 | sizeof(age_add_u)) <= 0) { | |
6a11d5c5 MC |
4021 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
4022 | SSL_F_TLS_CONSTRUCT_NEW_SESSION_TICKET, | |
4023 | ERR_R_INTERNAL_ERROR); | |
4024 | goto err; | |
4025 | } | |
4026 | s->session->ext.tick_age_add = age_add_u.age_add; | |
4027 | ||
4028 | nonce = s->next_ticket_nonce; | |
4029 | for (i = TICKET_NONCE_SIZE; i > 0; i--) { | |
4030 | tick_nonce[i - 1] = (unsigned char)(nonce & 0xff); | |
4031 | nonce >>= 8; | |
4032 | } | |
4033 | ||
4034 | if (!tls13_hkdf_expand(s, md, s->resumption_master_secret, | |
4035 | nonce_label, | |
4036 | sizeof(nonce_label) - 1, | |
4037 | tick_nonce, | |
4038 | TICKET_NONCE_SIZE, | |
4039 | s->session->master_key, | |
0fb2815b | 4040 | hashlen, 1)) { |
6a11d5c5 MC |
4041 | /* SSLfatal() already called */ |
4042 | goto err; | |
4043 | } | |
4044 | s->session->master_key_length = hashlen; | |
4045 | ||
4046 | s->session->time = (long)time(NULL); | |
555cbb32 | 4047 | if (s->s3.alpn_selected != NULL) { |
6a11d5c5 MC |
4048 | OPENSSL_free(s->session->ext.alpn_selected); |
4049 | s->session->ext.alpn_selected = | |
555cbb32 | 4050 | OPENSSL_memdup(s->s3.alpn_selected, s->s3.alpn_selected_len); |
6a11d5c5 MC |
4051 | if (s->session->ext.alpn_selected == NULL) { |
4052 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
4053 | SSL_F_TLS_CONSTRUCT_NEW_SESSION_TICKET, | |
4054 | ERR_R_MALLOC_FAILURE); | |
4055 | goto err; | |
4056 | } | |
555cbb32 | 4057 | s->session->ext.alpn_selected_len = s->s3.alpn_selected_len; |
6a11d5c5 MC |
4058 | } |
4059 | s->session->ext.max_early_data = s->max_early_data; | |
4060 | } | |
4061 | ||
4062 | if (tctx->generate_ticket_cb != NULL && | |
4063 | tctx->generate_ticket_cb(s, tctx->ticket_cb_data) == 0) | |
4064 | goto err; | |
4065 | ||
e880d4e5 MC |
4066 | /* |
4067 | * If we are using anti-replay protection then we behave as if | |
4068 | * SSL_OP_NO_TICKET is set - we are caching tickets anyway so there | |
4069 | * is no point in using full stateless tickets. | |
4070 | */ | |
5d263fb7 MC |
4071 | if (SSL_IS_TLS13(s) |
4072 | && ((s->options & SSL_OP_NO_TICKET) != 0 | |
4073 | || (s->max_early_data > 0 | |
4074 | && (s->options & SSL_OP_NO_ANTI_REPLAY) == 0))) { | |
6cc0b3c2 MC |
4075 | if (!construct_stateful_ticket(s, pkt, age_add_u.age_add, tick_nonce)) { |
4076 | /* SSLfatal() already called */ | |
4077 | goto err; | |
4078 | } | |
4079 | } else if (!construct_stateless_ticket(s, pkt, age_add_u.age_add, | |
4080 | tick_nonce)) { | |
6a11d5c5 MC |
4081 | /* SSLfatal() already called */ |
4082 | goto err; | |
4083 | } | |
4084 | ||
16ff1342 | 4085 | if (SSL_IS_TLS13(s)) { |
16ff1342 MC |
4086 | if (!tls_construct_extensions(s, pkt, |
4087 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET, | |
4088 | NULL, 0)) { | |
4089 | /* SSLfatal() already called */ | |
4090 | goto err; | |
4091 | } | |
4ff1a526 MC |
4092 | /* |
4093 | * Increment both |sent_tickets| and |next_ticket_nonce|. |sent_tickets| | |
4094 | * gets reset to 0 if we send more tickets following a post-handshake | |
4095 | * auth, but |next_ticket_nonce| does not. | |
4096 | */ | |
9d0a8bb7 | 4097 | s->sent_tickets++; |
4ff1a526 | 4098 | s->next_ticket_nonce++; |
36ff232c | 4099 | ssl_update_cache(s, SSL_SESS_CACHE_SERVER); |
f63a17d6 | 4100 | } |
e27f234a MC |
4101 | |
4102 | return 1; | |
687eaf27 | 4103 | err: |
e27f234a | 4104 | return 0; |
0f113f3e | 4105 | } |
67c8e7f4 | 4106 | |
f63e4288 MC |
4107 | /* |
4108 | * In TLSv1.3 this is called from the extensions code, otherwise it is used to | |
4109 | * create a separate message. Returns 1 on success or 0 on failure. | |
4110 | */ | |
4111 | int tls_construct_cert_status_body(SSL *s, WPACKET *pkt) | |
e27f234a | 4112 | { |
8cbfcc70 RS |
4113 | if (!WPACKET_put_bytes_u8(pkt, s->ext.status_type) |
4114 | || !WPACKET_sub_memcpy_u24(pkt, s->ext.ocsp.resp, | |
4115 | s->ext.ocsp.resp_len)) { | |
3ec8d113 MC |
4116 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CERT_STATUS_BODY, |
4117 | ERR_R_INTERNAL_ERROR); | |
f63e4288 MC |
4118 | return 0; |
4119 | } | |
4120 | ||
4121 | return 1; | |
4122 | } | |
4123 | ||
4124 | int tls_construct_cert_status(SSL *s, WPACKET *pkt) | |
4125 | { | |
4126 | if (!tls_construct_cert_status_body(s, pkt)) { | |
3ec8d113 | 4127 | /* SSLfatal() already called */ |
cc59ad10 MC |
4128 | return 0; |
4129 | } | |
e27f234a MC |
4130 | |
4131 | return 1; | |
4132 | } | |
4133 | ||
e481f9b9 | 4134 | #ifndef OPENSSL_NO_NEXTPROTONEG |
e27f234a MC |
4135 | /* |
4136 | * tls_process_next_proto reads a Next Protocol Negotiation handshake message. | |
4137 | * It sets the next_proto member in s if found | |
4138 | */ | |
be3583fa | 4139 | MSG_PROCESS_RETURN tls_process_next_proto(SSL *s, PACKET *pkt) |
e27f234a | 4140 | { |
73999b62 | 4141 | PACKET next_proto, padding; |
e27f234a MC |
4142 | size_t next_proto_len; |
4143 | ||
50e735f9 MC |
4144 | /*- |
4145 | * The payload looks like: | |
4146 | * uint8 proto_len; | |
4147 | * uint8 proto[proto_len]; | |
4148 | * uint8 padding_len; | |
4149 | * uint8 padding[padding_len]; | |
4150 | */ | |
73999b62 MC |
4151 | if (!PACKET_get_length_prefixed_1(pkt, &next_proto) |
4152 | || !PACKET_get_length_prefixed_1(pkt, &padding) | |
4153 | || PACKET_remaining(pkt) > 0) { | |
f63a17d6 MC |
4154 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_NEXT_PROTO, |
4155 | SSL_R_LENGTH_MISMATCH); | |
4156 | return MSG_PROCESS_ERROR; | |
cf9b0b6f | 4157 | } |
0f113f3e | 4158 | |
aff8c126 RS |
4159 | if (!PACKET_memdup(&next_proto, &s->ext.npn, &next_proto_len)) { |
4160 | s->ext.npn_len = 0; | |
f63a17d6 MC |
4161 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_NEXT_PROTO, |
4162 | ERR_R_INTERNAL_ERROR); | |
4163 | return MSG_PROCESS_ERROR; | |
c3fc7eea MC |
4164 | } |
4165 | ||
aff8c126 | 4166 | s->ext.npn_len = (unsigned char)next_proto_len; |
0f113f3e | 4167 | |
e27f234a | 4168 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e | 4169 | } |
6434abbf | 4170 | #endif |
d45ba43d | 4171 | |
e46f2334 MC |
4172 | static int tls_construct_encrypted_extensions(SSL *s, WPACKET *pkt) |
4173 | { | |
fe874d27 | 4174 | if (!tls_construct_extensions(s, pkt, SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, |
f63a17d6 MC |
4175 | NULL, 0)) { |
4176 | /* SSLfatal() already called */ | |
e46f2334 MC |
4177 | return 0; |
4178 | } | |
4179 | ||
4180 | return 1; | |
4181 | } | |
4182 | ||
ef6c191b MC |
4183 | MSG_PROCESS_RETURN tls_process_end_of_early_data(SSL *s, PACKET *pkt) |
4184 | { | |
ef6c191b | 4185 | if (PACKET_remaining(pkt) != 0) { |
f63a17d6 MC |
4186 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_END_OF_EARLY_DATA, |
4187 | SSL_R_LENGTH_MISMATCH); | |
ef6c191b MC |
4188 | return MSG_PROCESS_ERROR; |
4189 | } | |
4190 | ||
4191 | if (s->early_data_state != SSL_EARLY_DATA_READING | |
4192 | && s->early_data_state != SSL_EARLY_DATA_READ_RETRY) { | |
f63a17d6 MC |
4193 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_END_OF_EARLY_DATA, |
4194 | ERR_R_INTERNAL_ERROR); | |
4195 | return MSG_PROCESS_ERROR; | |
ef6c191b MC |
4196 | } |
4197 | ||
4198 | /* | |
4199 | * EndOfEarlyData signals a key change so the end of the message must be on | |
4200 | * a record boundary. | |
4201 | */ | |
4202 | if (RECORD_LAYER_processed_read_pending(&s->rlayer)) { | |
f63a17d6 MC |
4203 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, |
4204 | SSL_F_TLS_PROCESS_END_OF_EARLY_DATA, | |
4205 | SSL_R_NOT_ON_RECORD_BOUNDARY); | |
4206 | return MSG_PROCESS_ERROR; | |
ef6c191b MC |
4207 | } |
4208 | ||
4209 | s->early_data_state = SSL_EARLY_DATA_FINISHED_READING; | |
4210 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
4211 | SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_SERVER_READ)) { | |
f63a17d6 MC |
4212 | /* SSLfatal() already called */ |
4213 | return MSG_PROCESS_ERROR; | |
ef6c191b MC |
4214 | } |
4215 | ||
4216 | return MSG_PROCESS_CONTINUE_READING; | |
ef6c191b | 4217 | } |