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25670f3e MC |
1 | /* |
2 | * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved. | |
3 | * | |
4 | * Licensed under the OpenSSL license (the "License"). You may not use | |
5 | * this file except in compliance with the License. You can obtain a copy | |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
8 | */ | |
9 | ||
10 | #include <openssl/ocsp.h> | |
11 | #include "../ssl_locl.h" | |
12 | #include "statem_locl.h" | |
13 | ||
14 | /* | |
15 | * Parse the client's renegotiation binding and abort if it's not right | |
16 | */ | |
61138358 MC |
17 | int tls_parse_ctos_renegotiate(SSL *s, PACKET *pkt, unsigned int context, |
18 | X509 *x, size_t chainidx, int *al) | |
25670f3e MC |
19 | { |
20 | unsigned int ilen; | |
21 | const unsigned char *data; | |
22 | ||
23 | /* Parse the length byte */ | |
24 | if (!PACKET_get_1(pkt, &ilen) | |
25 | || !PACKET_get_bytes(pkt, &data, ilen)) { | |
7fe97c07 | 26 | SSLerr(SSL_F_TLS_PARSE_CTOS_RENEGOTIATE, |
25670f3e MC |
27 | SSL_R_RENEGOTIATION_ENCODING_ERR); |
28 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
29 | return 0; | |
30 | } | |
31 | ||
32 | /* Check that the extension matches */ | |
33 | if (ilen != s->s3->previous_client_finished_len) { | |
7fe97c07 | 34 | SSLerr(SSL_F_TLS_PARSE_CTOS_RENEGOTIATE, |
25670f3e MC |
35 | SSL_R_RENEGOTIATION_MISMATCH); |
36 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
37 | return 0; | |
38 | } | |
39 | ||
40 | if (memcmp(data, s->s3->previous_client_finished, | |
41 | s->s3->previous_client_finished_len)) { | |
7fe97c07 | 42 | SSLerr(SSL_F_TLS_PARSE_CTOS_RENEGOTIATE, |
25670f3e MC |
43 | SSL_R_RENEGOTIATION_MISMATCH); |
44 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
45 | return 0; | |
46 | } | |
47 | ||
48 | s->s3->send_connection_binding = 1; | |
49 | ||
50 | return 1; | |
51 | } | |
52 | ||
1266eefd MC |
53 | /*- |
54 | * The servername extension is treated as follows: | |
55 | * | |
56 | * - Only the hostname type is supported with a maximum length of 255. | |
57 | * - The servername is rejected if too long or if it contains zeros, | |
58 | * in which case an fatal alert is generated. | |
59 | * - The servername field is maintained together with the session cache. | |
60 | * - When a session is resumed, the servername call back invoked in order | |
61 | * to allow the application to position itself to the right context. | |
62 | * - The servername is acknowledged if it is new for a session or when | |
63 | * it is identical to a previously used for the same session. | |
64 | * Applications can control the behaviour. They can at any time | |
65 | * set a 'desirable' servername for a new SSL object. This can be the | |
66 | * case for example with HTTPS when a Host: header field is received and | |
67 | * a renegotiation is requested. In this case, a possible servername | |
68 | * presented in the new client hello is only acknowledged if it matches | |
69 | * the value of the Host: field. | |
70 | * - Applications must use SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION | |
71 | * if they provide for changing an explicit servername context for the | |
72 | * session, i.e. when the session has been established with a servername | |
73 | * extension. | |
74 | * - On session reconnect, the servername extension may be absent. | |
75 | */ | |
61138358 MC |
76 | int tls_parse_ctos_server_name(SSL *s, PACKET *pkt, unsigned int context, |
77 | X509 *x, size_t chainidx, int *al) | |
25670f3e MC |
78 | { |
79 | unsigned int servname_type; | |
80 | PACKET sni, hostname; | |
81 | ||
25670f3e MC |
82 | if (!PACKET_as_length_prefixed_2(pkt, &sni) |
83 | /* ServerNameList must be at least 1 byte long. */ | |
84 | || PACKET_remaining(&sni) == 0) { | |
85 | *al = SSL_AD_DECODE_ERROR; | |
86 | return 0; | |
87 | } | |
88 | ||
89 | /* | |
90 | * Although the server_name extension was intended to be | |
91 | * extensible to new name types, RFC 4366 defined the | |
1266eefd | 92 | * syntax inextensibly and OpenSSL 1.0.x parses it as |
25670f3e MC |
93 | * such. |
94 | * RFC 6066 corrected the mistake but adding new name types | |
95 | * is nevertheless no longer feasible, so act as if no other | |
96 | * SNI types can exist, to simplify parsing. | |
97 | * | |
98 | * Also note that the RFC permits only one SNI value per type, | |
99 | * i.e., we can only have a single hostname. | |
100 | */ | |
101 | if (!PACKET_get_1(&sni, &servname_type) | |
102 | || servname_type != TLSEXT_NAMETYPE_host_name | |
103 | || !PACKET_as_length_prefixed_2(&sni, &hostname)) { | |
104 | *al = SSL_AD_DECODE_ERROR; | |
105 | return 0; | |
106 | } | |
107 | ||
108 | if (!s->hit) { | |
109 | if (PACKET_remaining(&hostname) > TLSEXT_MAXLEN_host_name) { | |
110 | *al = TLS1_AD_UNRECOGNIZED_NAME; | |
111 | return 0; | |
112 | } | |
113 | ||
114 | if (PACKET_contains_zero_byte(&hostname)) { | |
115 | *al = TLS1_AD_UNRECOGNIZED_NAME; | |
116 | return 0; | |
117 | } | |
118 | ||
7d061fce MC |
119 | OPENSSL_free(s->session->ext.hostname); |
120 | s->session->ext.hostname = NULL; | |
aff8c126 | 121 | if (!PACKET_strndup(&hostname, &s->session->ext.hostname)) { |
25670f3e MC |
122 | *al = TLS1_AD_INTERNAL_ERROR; |
123 | return 0; | |
124 | } | |
125 | ||
126 | s->servername_done = 1; | |
127 | } else { | |
128 | /* | |
129 | * TODO(openssl-team): if the SNI doesn't match, we MUST | |
130 | * fall back to a full handshake. | |
131 | */ | |
aff8c126 RS |
132 | s->servername_done = s->session->ext.hostname |
133 | && PACKET_equal(&hostname, s->session->ext.hostname, | |
134 | strlen(s->session->ext.hostname)); | |
25670f3e MC |
135 | } |
136 | ||
137 | return 1; | |
138 | } | |
139 | ||
140 | #ifndef OPENSSL_NO_SRP | |
61138358 MC |
141 | int tls_parse_ctos_srp(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
142 | size_t chainidx, int *al) | |
25670f3e MC |
143 | { |
144 | PACKET srp_I; | |
145 | ||
146 | if (!PACKET_as_length_prefixed_1(pkt, &srp_I) | |
147 | || PACKET_contains_zero_byte(&srp_I)) { | |
148 | *al = SSL_AD_DECODE_ERROR; | |
149 | return 0; | |
150 | } | |
151 | ||
152 | /* | |
153 | * TODO(openssl-team): currently, we re-authenticate the user | |
154 | * upon resumption. Instead, we MUST ignore the login. | |
155 | */ | |
156 | if (!PACKET_strndup(&srp_I, &s->srp_ctx.login)) { | |
157 | *al = TLS1_AD_INTERNAL_ERROR; | |
158 | return 0; | |
159 | } | |
160 | ||
161 | return 1; | |
162 | } | |
163 | #endif | |
164 | ||
0a87d0ac MC |
165 | int tls_parse_ctos_early_data(SSL *s, PACKET *pkt, unsigned int context, |
166 | X509 *x, size_t chainidx, int *al) | |
167 | { | |
168 | if (PACKET_remaining(pkt) != 0) { | |
169 | *al = SSL_AD_DECODE_ERROR; | |
170 | return 0; | |
171 | } | |
172 | ||
1ea4d09a MC |
173 | if (s->max_early_data == 0 || !s->hit || s->session->ext.tick_identity != 0 |
174 | || s->early_data_state != SSL_EARLY_DATA_ACCEPTING) { | |
175 | s->ext.early_data = SSL_EARLY_DATA_REJECTED; | |
176 | } else { | |
177 | s->ext.early_data = SSL_EARLY_DATA_ACCEPTED; | |
178 | ||
179 | if (!tls13_change_cipher_state(s, | |
180 | SSL3_CC_EARLY | SSL3_CHANGE_CIPHER_SERVER_READ)) { | |
181 | *al = SSL_AD_INTERNAL_ERROR; | |
182 | return 0; | |
183 | } | |
184 | } | |
0a87d0ac MC |
185 | |
186 | return 1; | |
187 | } | |
188 | ||
25670f3e | 189 | #ifndef OPENSSL_NO_EC |
61138358 MC |
190 | int tls_parse_ctos_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context, |
191 | X509 *x, size_t chainidx, int *al) | |
25670f3e MC |
192 | { |
193 | PACKET ec_point_format_list; | |
194 | ||
195 | if (!PACKET_as_length_prefixed_1(pkt, &ec_point_format_list) | |
196 | || PACKET_remaining(&ec_point_format_list) == 0) { | |
197 | *al = SSL_AD_DECODE_ERROR; | |
198 | return 0; | |
199 | } | |
200 | ||
201 | if (!s->hit) { | |
202 | if (!PACKET_memdup(&ec_point_format_list, | |
aff8c126 RS |
203 | &s->session->ext.ecpointformats, |
204 | &s->session->ext.ecpointformats_len)) { | |
25670f3e MC |
205 | *al = TLS1_AD_INTERNAL_ERROR; |
206 | return 0; | |
207 | } | |
208 | } | |
209 | ||
210 | return 1; | |
211 | } | |
212 | #endif /* OPENSSL_NO_EC */ | |
213 | ||
61138358 MC |
214 | int tls_parse_ctos_session_ticket(SSL *s, PACKET *pkt, unsigned int context, |
215 | X509 *x, size_t chainidx, int *al) | |
25670f3e | 216 | { |
aff8c126 RS |
217 | if (s->ext.session_ticket_cb && |
218 | !s->ext.session_ticket_cb(s, PACKET_data(pkt), | |
219 | PACKET_remaining(pkt), | |
220 | s->ext.session_ticket_cb_arg)) { | |
25670f3e MC |
221 | *al = TLS1_AD_INTERNAL_ERROR; |
222 | return 0; | |
223 | } | |
224 | ||
225 | return 1; | |
226 | } | |
227 | ||
61138358 MC |
228 | int tls_parse_ctos_sig_algs(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
229 | size_t chainidx, int *al) | |
25670f3e MC |
230 | { |
231 | PACKET supported_sig_algs; | |
232 | ||
233 | if (!PACKET_as_length_prefixed_2(pkt, &supported_sig_algs) | |
25670f3e MC |
234 | || PACKET_remaining(&supported_sig_algs) == 0) { |
235 | *al = SSL_AD_DECODE_ERROR; | |
236 | return 0; | |
237 | } | |
238 | ||
703bcee0 MC |
239 | if (!s->hit && !tls1_save_sigalgs(s, &supported_sig_algs)) { |
240 | *al = TLS1_AD_DECODE_ERROR; | |
25670f3e MC |
241 | return 0; |
242 | } | |
243 | ||
244 | return 1; | |
245 | } | |
246 | ||
ab83e314 | 247 | #ifndef OPENSSL_NO_OCSP |
61138358 MC |
248 | int tls_parse_ctos_status_request(SSL *s, PACKET *pkt, unsigned int context, |
249 | X509 *x, size_t chainidx, int *al) | |
25670f3e | 250 | { |
1266eefd MC |
251 | PACKET responder_id_list, exts; |
252 | ||
e96e0f8e MC |
253 | /* Not defined if we get one of these in a client Certificate */ |
254 | if (x != NULL) | |
255 | return 1; | |
256 | ||
aff8c126 | 257 | if (!PACKET_get_1(pkt, (unsigned int *)&s->ext.status_type)) { |
25670f3e MC |
258 | *al = SSL_AD_DECODE_ERROR; |
259 | return 0; | |
260 | } | |
ab83e314 | 261 | |
aff8c126 | 262 | if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) { |
25670f3e | 263 | /* |
1266eefd | 264 | * We don't know what to do with any other type so ignore it. |
25670f3e | 265 | */ |
aff8c126 | 266 | s->ext.status_type = TLSEXT_STATUSTYPE_nothing; |
1266eefd MC |
267 | return 1; |
268 | } | |
25670f3e | 269 | |
1266eefd MC |
270 | if (!PACKET_get_length_prefixed_2 (pkt, &responder_id_list)) { |
271 | *al = SSL_AD_DECODE_ERROR; | |
272 | return 0; | |
273 | } | |
25670f3e | 274 | |
1266eefd MC |
275 | /* |
276 | * We remove any OCSP_RESPIDs from a previous handshake | |
277 | * to prevent unbounded memory growth - CVE-2016-6304 | |
278 | */ | |
aff8c126 | 279 | sk_OCSP_RESPID_pop_free(s->ext.ocsp.ids, OCSP_RESPID_free); |
1266eefd | 280 | if (PACKET_remaining(&responder_id_list) > 0) { |
aff8c126 RS |
281 | s->ext.ocsp.ids = sk_OCSP_RESPID_new_null(); |
282 | if (s->ext.ocsp.ids == NULL) { | |
1266eefd MC |
283 | *al = SSL_AD_INTERNAL_ERROR; |
284 | return 0; | |
285 | } | |
286 | } else { | |
aff8c126 | 287 | s->ext.ocsp.ids = NULL; |
1266eefd | 288 | } |
25670f3e | 289 | |
1266eefd MC |
290 | while (PACKET_remaining(&responder_id_list) > 0) { |
291 | OCSP_RESPID *id; | |
292 | PACKET responder_id; | |
293 | const unsigned char *id_data; | |
25670f3e | 294 | |
1266eefd MC |
295 | if (!PACKET_get_length_prefixed_2(&responder_id_list, &responder_id) |
296 | || PACKET_remaining(&responder_id) == 0) { | |
297 | *al = SSL_AD_DECODE_ERROR; | |
298 | return 0; | |
299 | } | |
25670f3e | 300 | |
1266eefd MC |
301 | id_data = PACKET_data(&responder_id); |
302 | /* TODO(size_t): Convert d2i_* to size_t */ | |
303 | id = d2i_OCSP_RESPID(NULL, &id_data, | |
304 | (int)PACKET_remaining(&responder_id)); | |
305 | if (id == NULL) { | |
306 | *al = SSL_AD_DECODE_ERROR; | |
307 | return 0; | |
25670f3e MC |
308 | } |
309 | ||
1266eefd MC |
310 | if (id_data != PACKET_end(&responder_id)) { |
311 | OCSP_RESPID_free(id); | |
25670f3e MC |
312 | *al = SSL_AD_DECODE_ERROR; |
313 | return 0; | |
314 | } | |
315 | ||
aff8c126 | 316 | if (!sk_OCSP_RESPID_push(s->ext.ocsp.ids, id)) { |
1266eefd MC |
317 | OCSP_RESPID_free(id); |
318 | *al = SSL_AD_INTERNAL_ERROR; | |
319 | return 0; | |
320 | } | |
321 | } | |
322 | ||
323 | /* Read in request_extensions */ | |
324 | if (!PACKET_as_length_prefixed_2(pkt, &exts)) { | |
325 | *al = SSL_AD_DECODE_ERROR; | |
326 | return 0; | |
327 | } | |
328 | ||
329 | if (PACKET_remaining(&exts) > 0) { | |
330 | const unsigned char *ext_data = PACKET_data(&exts); | |
331 | ||
aff8c126 | 332 | sk_X509_EXTENSION_pop_free(s->ext.ocsp.exts, |
1266eefd | 333 | X509_EXTENSION_free); |
aff8c126 | 334 | s->ext.ocsp.exts = |
1266eefd | 335 | d2i_X509_EXTENSIONS(NULL, &ext_data, (int)PACKET_remaining(&exts)); |
aff8c126 | 336 | if (s->ext.ocsp.exts == NULL || ext_data != PACKET_end(&exts)) { |
1266eefd MC |
337 | *al = SSL_AD_DECODE_ERROR; |
338 | return 0; | |
25670f3e | 339 | } |
25670f3e MC |
340 | } |
341 | ||
342 | return 1; | |
343 | } | |
ab83e314 | 344 | #endif |
25670f3e MC |
345 | |
346 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
61138358 MC |
347 | int tls_parse_ctos_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
348 | size_t chainidx, int *al) | |
25670f3e | 349 | { |
1266eefd MC |
350 | /* |
351 | * We shouldn't accept this extension on a | |
352 | * renegotiation. | |
1266eefd | 353 | */ |
c7f47786 | 354 | if (SSL_IS_FIRST_HANDSHAKE(s)) |
aff8c126 | 355 | s->s3->npn_seen = 1; |
25670f3e MC |
356 | |
357 | return 1; | |
358 | } | |
359 | #endif | |
360 | ||
361 | /* | |
1266eefd MC |
362 | * Save the ALPN extension in a ClientHello.|pkt| holds the contents of the ALPN |
363 | * extension, not including type and length. |al| is a pointer to the alert | |
364 | * value to send in the event of a failure. Returns: 1 on success, 0 on error. | |
25670f3e | 365 | */ |
61138358 MC |
366 | int tls_parse_ctos_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
367 | size_t chainidx, int *al) | |
25670f3e MC |
368 | { |
369 | PACKET protocol_list, save_protocol_list, protocol; | |
370 | ||
c7f47786 | 371 | if (!SSL_IS_FIRST_HANDSHAKE(s)) |
25670f3e MC |
372 | return 1; |
373 | ||
374 | if (!PACKET_as_length_prefixed_2(pkt, &protocol_list) | |
375 | || PACKET_remaining(&protocol_list) < 2) { | |
376 | *al = SSL_AD_DECODE_ERROR; | |
377 | return 0; | |
378 | } | |
379 | ||
380 | save_protocol_list = protocol_list; | |
381 | do { | |
382 | /* Protocol names can't be empty. */ | |
383 | if (!PACKET_get_length_prefixed_1(&protocol_list, &protocol) | |
384 | || PACKET_remaining(&protocol) == 0) { | |
385 | *al = SSL_AD_DECODE_ERROR; | |
386 | return 0; | |
387 | } | |
388 | } while (PACKET_remaining(&protocol_list) != 0); | |
389 | ||
7d061fce MC |
390 | OPENSSL_free(s->s3->alpn_proposed); |
391 | s->s3->alpn_proposed = NULL; | |
392 | s->s3->alpn_proposed_len = 0; | |
25670f3e MC |
393 | if (!PACKET_memdup(&save_protocol_list, |
394 | &s->s3->alpn_proposed, &s->s3->alpn_proposed_len)) { | |
395 | *al = TLS1_AD_INTERNAL_ERROR; | |
396 | return 0; | |
397 | } | |
398 | ||
399 | return 1; | |
400 | } | |
401 | ||
402 | #ifndef OPENSSL_NO_SRTP | |
61138358 MC |
403 | int tls_parse_ctos_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
404 | size_t chainidx, int *al) | |
25670f3e | 405 | { |
25670f3e MC |
406 | STACK_OF(SRTP_PROTECTION_PROFILE) *srvr; |
407 | unsigned int ct, mki_len, id; | |
408 | int i, srtp_pref; | |
409 | PACKET subpkt; | |
410 | ||
411 | /* Ignore this if we have no SRTP profiles */ | |
412 | if (SSL_get_srtp_profiles(s) == NULL) | |
413 | return 1; | |
414 | ||
415 | /* Pull off the length of the cipher suite list and check it is even */ | |
1266eefd MC |
416 | if (!PACKET_get_net_2(pkt, &ct) || (ct & 1) != 0 |
417 | || !PACKET_get_sub_packet(pkt, &subpkt, ct)) { | |
7fe97c07 | 418 | SSLerr(SSL_F_TLS_PARSE_CTOS_USE_SRTP, |
25670f3e MC |
419 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
420 | *al = SSL_AD_DECODE_ERROR; | |
421 | return 0; | |
422 | } | |
423 | ||
424 | srvr = SSL_get_srtp_profiles(s); | |
425 | s->srtp_profile = NULL; | |
426 | /* Search all profiles for a match initially */ | |
427 | srtp_pref = sk_SRTP_PROTECTION_PROFILE_num(srvr); | |
428 | ||
429 | while (PACKET_remaining(&subpkt)) { | |
430 | if (!PACKET_get_net_2(&subpkt, &id)) { | |
7fe97c07 | 431 | SSLerr(SSL_F_TLS_PARSE_CTOS_USE_SRTP, |
25670f3e MC |
432 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
433 | *al = SSL_AD_DECODE_ERROR; | |
434 | return 0; | |
435 | } | |
436 | ||
437 | /* | |
438 | * Only look for match in profiles of higher preference than | |
439 | * current match. | |
440 | * If no profiles have been have been configured then this | |
441 | * does nothing. | |
442 | */ | |
443 | for (i = 0; i < srtp_pref; i++) { | |
d270de32 | 444 | SRTP_PROTECTION_PROFILE *sprof = |
1266eefd MC |
445 | sk_SRTP_PROTECTION_PROFILE_value(srvr, i); |
446 | ||
25670f3e MC |
447 | if (sprof->id == id) { |
448 | s->srtp_profile = sprof; | |
449 | srtp_pref = i; | |
450 | break; | |
451 | } | |
452 | } | |
453 | } | |
454 | ||
1266eefd | 455 | /* Now extract the MKI value as a sanity check, but discard it for now */ |
25670f3e | 456 | if (!PACKET_get_1(pkt, &mki_len)) { |
7fe97c07 | 457 | SSLerr(SSL_F_TLS_PARSE_CTOS_USE_SRTP, |
25670f3e MC |
458 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
459 | *al = SSL_AD_DECODE_ERROR; | |
460 | return 0; | |
461 | } | |
462 | ||
463 | if (!PACKET_forward(pkt, mki_len) | |
464 | || PACKET_remaining(pkt)) { | |
7fe97c07 | 465 | SSLerr(SSL_F_TLS_PARSE_CTOS_USE_SRTP, SSL_R_BAD_SRTP_MKI_VALUE); |
25670f3e MC |
466 | *al = SSL_AD_DECODE_ERROR; |
467 | return 0; | |
468 | } | |
469 | ||
470 | return 1; | |
471 | } | |
472 | #endif | |
473 | ||
61138358 MC |
474 | int tls_parse_ctos_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
475 | size_t chainidx, int *al) | |
25670f3e MC |
476 | { |
477 | if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC)) | |
28a31a0a | 478 | s->ext.use_etm = 1; |
25670f3e MC |
479 | |
480 | return 1; | |
481 | } | |
482 | ||
b2f7e8c0 MC |
483 | /* |
484 | * Process a psk_kex_modes extension received in the ClientHello. |pkt| contains | |
485 | * the raw PACKET data for the extension. Returns 1 on success or 0 on failure. | |
486 | * If a failure occurs then |*al| is set to an appropriate alert value. | |
487 | */ | |
61138358 MC |
488 | int tls_parse_ctos_psk_kex_modes(SSL *s, PACKET *pkt, unsigned int context, |
489 | X509 *x, size_t chainidx, int *al) | |
b2f7e8c0 MC |
490 | { |
491 | #ifndef OPENSSL_NO_TLS1_3 | |
492 | PACKET psk_kex_modes; | |
493 | unsigned int mode; | |
494 | ||
495 | if (!PACKET_as_length_prefixed_1(pkt, &psk_kex_modes) | |
496 | || PACKET_remaining(&psk_kex_modes) == 0) { | |
497 | *al = SSL_AD_DECODE_ERROR; | |
498 | return 0; | |
499 | } | |
500 | ||
501 | while (PACKET_get_1(&psk_kex_modes, &mode)) { | |
502 | if (mode == TLSEXT_KEX_MODE_KE_DHE) | |
503 | s->ext.psk_kex_mode |= TLSEXT_KEX_MODE_FLAG_KE_DHE; | |
504 | else if (mode == TLSEXT_KEX_MODE_KE) | |
505 | s->ext.psk_kex_mode |= TLSEXT_KEX_MODE_FLAG_KE; | |
506 | } | |
507 | #endif | |
508 | ||
509 | return 1; | |
510 | } | |
511 | ||
25670f3e MC |
512 | /* |
513 | * Process a key_share extension received in the ClientHello. |pkt| contains | |
514 | * the raw PACKET data for the extension. Returns 1 on success or 0 on failure. | |
515 | * If a failure occurs then |*al| is set to an appropriate alert value. | |
516 | */ | |
61138358 MC |
517 | int tls_parse_ctos_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
518 | size_t chainidx, int *al) | |
25670f3e | 519 | { |
3cf96e88 | 520 | #ifndef OPENSSL_NO_TLS1_3 |
25670f3e MC |
521 | unsigned int group_id; |
522 | PACKET key_share_list, encoded_pt; | |
523 | const unsigned char *clntcurves, *srvrcurves; | |
524 | size_t clnt_num_curves, srvr_num_curves; | |
525 | int group_nid, found = 0; | |
526 | unsigned int curve_flags; | |
527 | ||
f4bbb37c | 528 | if (s->hit && (s->ext.psk_kex_mode & TLSEXT_KEX_MODE_FLAG_KE_DHE) == 0) |
25670f3e MC |
529 | return 1; |
530 | ||
531 | /* Sanity check */ | |
532 | if (s->s3->peer_tmp != NULL) { | |
533 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 534 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
535 | return 0; |
536 | } | |
537 | ||
538 | if (!PACKET_as_length_prefixed_2(pkt, &key_share_list)) { | |
539 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
7fe97c07 | 540 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, SSL_R_LENGTH_MISMATCH); |
25670f3e MC |
541 | return 0; |
542 | } | |
543 | ||
544 | /* Get our list of supported curves */ | |
545 | if (!tls1_get_curvelist(s, 0, &srvrcurves, &srvr_num_curves)) { | |
546 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 547 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
548 | return 0; |
549 | } | |
550 | ||
24b8e4b2 | 551 | /* |
70af3d8e | 552 | * Get the clients list of supported curves. |
24b8e4b2 MC |
553 | * TODO(TLS1.3): We should validate that we actually received |
554 | * supported_groups! | |
555 | */ | |
25670f3e MC |
556 | if (!tls1_get_curvelist(s, 1, &clntcurves, &clnt_num_curves)) { |
557 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 558 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
559 | return 0; |
560 | } | |
561 | ||
562 | while (PACKET_remaining(&key_share_list) > 0) { | |
563 | if (!PACKET_get_net_2(&key_share_list, &group_id) | |
564 | || !PACKET_get_length_prefixed_2(&key_share_list, &encoded_pt) | |
565 | || PACKET_remaining(&encoded_pt) == 0) { | |
566 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
7fe97c07 | 567 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, |
25670f3e MC |
568 | SSL_R_LENGTH_MISMATCH); |
569 | return 0; | |
570 | } | |
571 | ||
572 | /* | |
573 | * If we already found a suitable key_share we loop through the | |
574 | * rest to verify the structure, but don't process them. | |
575 | */ | |
576 | if (found) | |
577 | continue; | |
578 | ||
579 | /* Check if this share is in supported_groups sent from client */ | |
580 | if (!check_in_list(s, group_id, clntcurves, clnt_num_curves, 0)) { | |
581 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
7fe97c07 | 582 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, SSL_R_BAD_KEY_SHARE); |
25670f3e MC |
583 | return 0; |
584 | } | |
585 | ||
586 | /* Check if this share is for a group we can use */ | |
587 | if (!check_in_list(s, group_id, srvrcurves, srvr_num_curves, 1)) { | |
588 | /* Share not suitable */ | |
589 | continue; | |
590 | } | |
591 | ||
592 | group_nid = tls1_ec_curve_id2nid(group_id, &curve_flags); | |
593 | ||
594 | if (group_nid == 0) { | |
595 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 596 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, |
25670f3e MC |
597 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
598 | return 0; | |
599 | } | |
600 | ||
601 | if ((curve_flags & TLS_CURVE_TYPE) == TLS_CURVE_CUSTOM) { | |
602 | /* Can happen for some curves, e.g. X25519 */ | |
603 | EVP_PKEY *key = EVP_PKEY_new(); | |
604 | ||
605 | if (key == NULL || !EVP_PKEY_set_type(key, group_nid)) { | |
606 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 607 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, ERR_R_EVP_LIB); |
25670f3e MC |
608 | EVP_PKEY_free(key); |
609 | return 0; | |
610 | } | |
611 | s->s3->peer_tmp = key; | |
612 | } else { | |
613 | /* Set up EVP_PKEY with named curve as parameters */ | |
614 | EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL); | |
1266eefd | 615 | |
25670f3e MC |
616 | if (pctx == NULL |
617 | || EVP_PKEY_paramgen_init(pctx) <= 0 | |
618 | || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, | |
619 | group_nid) <= 0 | |
620 | || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) { | |
621 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 622 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, ERR_R_EVP_LIB); |
25670f3e MC |
623 | EVP_PKEY_CTX_free(pctx); |
624 | return 0; | |
625 | } | |
626 | EVP_PKEY_CTX_free(pctx); | |
627 | pctx = NULL; | |
628 | } | |
629 | s->s3->group_id = group_id; | |
630 | ||
631 | if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp, | |
632 | PACKET_data(&encoded_pt), | |
633 | PACKET_remaining(&encoded_pt))) { | |
634 | *al = SSL_AD_DECODE_ERROR; | |
7fe97c07 | 635 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, SSL_R_BAD_ECPOINT); |
25670f3e MC |
636 | return 0; |
637 | } | |
638 | ||
639 | found = 1; | |
640 | } | |
3cf96e88 | 641 | #endif |
25670f3e MC |
642 | |
643 | return 1; | |
644 | } | |
645 | ||
646 | #ifndef OPENSSL_NO_EC | |
61138358 MC |
647 | int tls_parse_ctos_supported_groups(SSL *s, PACKET *pkt, unsigned int context, |
648 | X509 *x, size_t chainidx, int *al) | |
25670f3e MC |
649 | { |
650 | PACKET supported_groups_list; | |
651 | ||
652 | /* Each group is 2 bytes and we must have at least 1. */ | |
653 | if (!PACKET_as_length_prefixed_2(pkt, &supported_groups_list) | |
654 | || PACKET_remaining(&supported_groups_list) == 0 | |
655 | || (PACKET_remaining(&supported_groups_list) % 2) != 0) { | |
656 | *al = SSL_AD_DECODE_ERROR; | |
657 | return 0; | |
658 | } | |
659 | ||
7d061fce MC |
660 | OPENSSL_free(s->session->ext.supportedgroups); |
661 | s->session->ext.supportedgroups = NULL; | |
662 | s->session->ext.supportedgroups_len = 0; | |
1053a6e2 MC |
663 | if (!PACKET_memdup(&supported_groups_list, |
664 | &s->session->ext.supportedgroups, | |
665 | &s->session->ext.supportedgroups_len)) { | |
25670f3e MC |
666 | *al = SSL_AD_DECODE_ERROR; |
667 | return 0; | |
668 | } | |
669 | ||
670 | return 1; | |
671 | } | |
672 | #endif | |
673 | ||
61138358 MC |
674 | int tls_parse_ctos_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
675 | size_t chainidx, int *al) | |
25670f3e MC |
676 | { |
677 | /* The extension must always be empty */ | |
678 | if (PACKET_remaining(pkt) != 0) { | |
679 | *al = SSL_AD_DECODE_ERROR; | |
680 | return 0; | |
681 | } | |
682 | ||
683 | s->s3->flags |= TLS1_FLAGS_RECEIVED_EXTMS; | |
684 | ||
685 | return 1; | |
686 | } | |
7da160b0 | 687 | |
61138358 MC |
688 | int tls_parse_ctos_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
689 | size_t chainidx, int *al) | |
1053a6e2 MC |
690 | { |
691 | PACKET identities, binders, binder; | |
692 | size_t binderoffset, hashsize; | |
693 | SSL_SESSION *sess = NULL; | |
694 | unsigned int id, i; | |
695 | const EVP_MD *md = NULL; | |
696 | ||
1a9f457c MC |
697 | /* |
698 | * If we have no PSK kex mode that we recognise then we can't resume so | |
699 | * ignore this extension | |
700 | */ | |
701 | if ((s->ext.psk_kex_mode | |
702 | & (TLSEXT_KEX_MODE_FLAG_KE | TLSEXT_KEX_MODE_FLAG_KE_DHE)) == 0) | |
703 | return 1; | |
704 | ||
1053a6e2 MC |
705 | if (!PACKET_get_length_prefixed_2(pkt, &identities)) { |
706 | *al = SSL_AD_DECODE_ERROR; | |
707 | return 0; | |
708 | } | |
709 | ||
710 | for (id = 0; PACKET_remaining(&identities) != 0; id++) { | |
711 | PACKET identity; | |
712 | unsigned long ticket_age; | |
713 | int ret; | |
714 | ||
715 | if (!PACKET_get_length_prefixed_2(&identities, &identity) | |
716 | || !PACKET_get_net_4(&identities, &ticket_age)) { | |
717 | *al = SSL_AD_DECODE_ERROR; | |
718 | return 0; | |
719 | } | |
720 | ||
1b8bacff MC |
721 | /* TODO(TLS1.3): Should we validate the ticket age? */ |
722 | ||
1053a6e2 MC |
723 | ret = tls_decrypt_ticket(s, PACKET_data(&identity), |
724 | PACKET_remaining(&identity), NULL, 0, &sess); | |
725 | if (ret == TICKET_FATAL_ERR_MALLOC || ret == TICKET_FATAL_ERR_OTHER) { | |
726 | *al = SSL_AD_INTERNAL_ERROR; | |
727 | return 0; | |
728 | } | |
729 | if (ret == TICKET_NO_DECRYPT) | |
730 | continue; | |
731 | ||
534a43ff | 732 | md = ssl_md(sess->cipher->algorithm2); |
1053a6e2 MC |
733 | if (md == NULL) { |
734 | /* | |
735 | * Don't recognise this cipher so we can't use the session. | |
736 | * Ignore it | |
737 | */ | |
738 | SSL_SESSION_free(sess); | |
739 | sess = NULL; | |
740 | continue; | |
741 | } | |
742 | ||
743 | /* | |
744 | * TODO(TLS1.3): Somehow we need to handle the case of a ticket renewal. | |
745 | * Ignored for now | |
746 | */ | |
747 | ||
748 | break; | |
749 | } | |
750 | ||
751 | if (sess == NULL) | |
752 | return 1; | |
753 | ||
754 | binderoffset = PACKET_data(pkt) - (const unsigned char *)s->init_buf->data; | |
1053a6e2 MC |
755 | hashsize = EVP_MD_size(md); |
756 | ||
757 | if (!PACKET_get_length_prefixed_2(pkt, &binders)) { | |
758 | *al = SSL_AD_DECODE_ERROR; | |
759 | goto err; | |
760 | } | |
761 | ||
762 | for (i = 0; i <= id; i++) { | |
763 | if (!PACKET_get_length_prefixed_1(&binders, &binder)) { | |
764 | *al = SSL_AD_DECODE_ERROR; | |
765 | goto err; | |
766 | } | |
767 | } | |
768 | ||
769 | if (PACKET_remaining(&binder) != hashsize | |
770 | || tls_psk_do_binder(s, md, | |
771 | (const unsigned char *)s->init_buf->data, | |
772 | binderoffset, PACKET_data(&binder), NULL, | |
773 | sess, 0) != 1) { | |
774 | *al = SSL_AD_DECODE_ERROR; | |
775 | SSLerr(SSL_F_TLS_PARSE_CTOS_PSK, ERR_R_INTERNAL_ERROR); | |
776 | goto err; | |
777 | } | |
778 | ||
779 | sess->ext.tick_identity = id; | |
780 | SSL_SESSION_free(s->session); | |
781 | s->session = sess; | |
1053a6e2 MC |
782 | return 1; |
783 | err: | |
784 | return 0; | |
785 | } | |
786 | ||
1266eefd MC |
787 | /* |
788 | * Add the server's renegotiation binding | |
789 | */ | |
61138358 MC |
790 | int tls_construct_stoc_renegotiate(SSL *s, WPACKET *pkt, unsigned int context, |
791 | X509 *x, size_t chainidx, int *al) | |
7da160b0 MC |
792 | { |
793 | if (!s->s3->send_connection_binding) | |
794 | return 1; | |
795 | ||
796 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_renegotiate) | |
797 | || !WPACKET_start_sub_packet_u16(pkt) | |
798 | || !WPACKET_start_sub_packet_u8(pkt) | |
799 | || !WPACKET_memcpy(pkt, s->s3->previous_client_finished, | |
800 | s->s3->previous_client_finished_len) | |
801 | || !WPACKET_memcpy(pkt, s->s3->previous_server_finished, | |
802 | s->s3->previous_server_finished_len) | |
803 | || !WPACKET_close(pkt) | |
804 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 805 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_RENEGOTIATE, ERR_R_INTERNAL_ERROR); |
7da160b0 MC |
806 | return 0; |
807 | } | |
808 | ||
809 | return 1; | |
810 | } | |
811 | ||
61138358 MC |
812 | int tls_construct_stoc_server_name(SSL *s, WPACKET *pkt, unsigned int context, |
813 | X509 *x, size_t chainidx, int *al) | |
7da160b0 MC |
814 | { |
815 | if (s->hit || s->servername_done != 1 | |
aff8c126 | 816 | || s->session->ext.hostname == NULL) |
7da160b0 MC |
817 | return 1; |
818 | ||
819 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_server_name) | |
820 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 821 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_SERVER_NAME, ERR_R_INTERNAL_ERROR); |
7da160b0 MC |
822 | return 0; |
823 | } | |
824 | ||
825 | return 1; | |
826 | } | |
827 | ||
3fc8d856 MC |
828 | int tls_construct_stoc_early_data_info(SSL *s, WPACKET *pkt, |
829 | unsigned int context, X509 *x, | |
830 | size_t chainidx, int *al) | |
831 | { | |
832 | if (s->max_early_data == 0) | |
833 | return 1; | |
834 | ||
835 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data_info) | |
836 | || !WPACKET_start_sub_packet_u16(pkt) | |
837 | || !WPACKET_put_bytes_u32(pkt, s->max_early_data) | |
838 | || !WPACKET_close(pkt)) { | |
839 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_EARLY_DATA_INFO, ERR_R_INTERNAL_ERROR); | |
840 | return 0; | |
841 | } | |
842 | ||
843 | return 1; | |
844 | } | |
845 | ||
1ea4d09a MC |
846 | int tls_construct_stoc_early_data(SSL *s, WPACKET *pkt, unsigned int context, |
847 | X509 *x, size_t chainidx, int *al) | |
848 | { | |
849 | if (s->ext.early_data != SSL_EARLY_DATA_ACCEPTED) | |
850 | return 1; | |
851 | ||
852 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) | |
853 | || !WPACKET_start_sub_packet_u16(pkt) | |
854 | || !WPACKET_close(pkt)) { | |
855 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_EARLY_DATA, ERR_R_INTERNAL_ERROR); | |
856 | return 0; | |
857 | } | |
858 | ||
859 | return 1; | |
860 | } | |
861 | ||
7da160b0 | 862 | #ifndef OPENSSL_NO_EC |
61138358 MC |
863 | int tls_construct_stoc_ec_pt_formats(SSL *s, WPACKET *pkt, unsigned int context, |
864 | X509 *x, size_t chainidx, int *al) | |
7da160b0 MC |
865 | { |
866 | unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
867 | unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
89247375 | 868 | int using_ecc = ((alg_k & SSL_kECDHE) || (alg_a & SSL_aECDSA)) |
aff8c126 | 869 | && (s->session->ext.ecpointformats != NULL); |
7da160b0 MC |
870 | const unsigned char *plist; |
871 | size_t plistlen; | |
872 | ||
873 | if (!using_ecc) | |
874 | return 1; | |
875 | ||
876 | tls1_get_formatlist(s, &plist, &plistlen); | |
7da160b0 MC |
877 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_ec_point_formats) |
878 | || !WPACKET_start_sub_packet_u16(pkt) | |
879 | || !WPACKET_sub_memcpy_u8(pkt, plist, plistlen) | |
880 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 881 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR); |
7da160b0 MC |
882 | return 0; |
883 | } | |
884 | ||
885 | return 1; | |
886 | } | |
887 | #endif | |
888 | ||
61138358 MC |
889 | int tls_construct_stoc_session_ticket(SSL *s, WPACKET *pkt, |
890 | unsigned int context, X509 *x, | |
8521ced6 | 891 | size_t chainidx, int *al) |
7da160b0 | 892 | { |
aff8c126 RS |
893 | if (!s->ext.ticket_expected || !tls_use_ticket(s)) { |
894 | s->ext.ticket_expected = 0; | |
7da160b0 MC |
895 | return 1; |
896 | } | |
897 | ||
898 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket) | |
899 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 900 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_SESSION_TICKET, ERR_R_INTERNAL_ERROR); |
7da160b0 MC |
901 | return 0; |
902 | } | |
903 | ||
904 | return 1; | |
905 | } | |
906 | ||
ab83e314 | 907 | #ifndef OPENSSL_NO_OCSP |
61138358 MC |
908 | int tls_construct_stoc_status_request(SSL *s, WPACKET *pkt, |
909 | unsigned int context, X509 *x, | |
910 | size_t chainidx, int *al) | |
7da160b0 | 911 | { |
aff8c126 | 912 | if (!s->ext.status_expected) |
7da160b0 MC |
913 | return 1; |
914 | ||
8521ced6 | 915 | if (SSL_IS_TLS13(s) && chainidx != 0) |
e96e0f8e MC |
916 | return 1; |
917 | ||
7da160b0 | 918 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request) |
f63e4288 MC |
919 | || !WPACKET_start_sub_packet_u16(pkt)) { |
920 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); | |
921 | return 0; | |
922 | } | |
923 | ||
924 | /* | |
925 | * In TLSv1.3 we include the certificate status itself. In <= TLSv1.2 we | |
926 | * send back an empty extension, with the certificate status appearing as a | |
927 | * separate message | |
928 | */ | |
929 | if ((SSL_IS_TLS13(s) && !tls_construct_cert_status_body(s, pkt)) | |
930 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 931 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); |
7da160b0 MC |
932 | return 0; |
933 | } | |
934 | ||
935 | return 1; | |
936 | } | |
ab83e314 | 937 | #endif |
7da160b0 | 938 | |
7da160b0 | 939 | #ifndef OPENSSL_NO_NEXTPROTONEG |
61138358 MC |
940 | int tls_construct_stoc_next_proto_neg(SSL *s, WPACKET *pkt, |
941 | unsigned int context, X509 *x, | |
8521ced6 | 942 | size_t chainidx, int *al) |
7da160b0 MC |
943 | { |
944 | const unsigned char *npa; | |
945 | unsigned int npalen; | |
946 | int ret; | |
aff8c126 | 947 | int npn_seen = s->s3->npn_seen; |
7da160b0 | 948 | |
aff8c126 RS |
949 | s->s3->npn_seen = 0; |
950 | if (!npn_seen || s->ctx->ext.npn_advertised_cb == NULL) | |
7da160b0 MC |
951 | return 1; |
952 | ||
aff8c126 RS |
953 | ret = s->ctx->ext.npn_advertised_cb(s, &npa, &npalen, |
954 | s->ctx->ext.npn_advertised_cb_arg); | |
7da160b0 MC |
955 | if (ret == SSL_TLSEXT_ERR_OK) { |
956 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_next_proto_neg) | |
957 | || !WPACKET_sub_memcpy_u16(pkt, npa, npalen)) { | |
7fe97c07 | 958 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_NEXT_PROTO_NEG, |
7da160b0 MC |
959 | ERR_R_INTERNAL_ERROR); |
960 | return 0; | |
961 | } | |
aff8c126 | 962 | s->s3->npn_seen = 1; |
7da160b0 MC |
963 | } |
964 | ||
965 | return 1; | |
966 | } | |
967 | #endif | |
968 | ||
61138358 MC |
969 | int tls_construct_stoc_alpn(SSL *s, WPACKET *pkt, unsigned int context, X509 *x, |
970 | size_t chainidx, int *al) | |
7da160b0 MC |
971 | { |
972 | if (s->s3->alpn_selected == NULL) | |
973 | return 1; | |
974 | ||
975 | if (!WPACKET_put_bytes_u16(pkt, | |
976 | TLSEXT_TYPE_application_layer_protocol_negotiation) | |
977 | || !WPACKET_start_sub_packet_u16(pkt) | |
978 | || !WPACKET_start_sub_packet_u16(pkt) | |
979 | || !WPACKET_sub_memcpy_u8(pkt, s->s3->alpn_selected, | |
980 | s->s3->alpn_selected_len) | |
981 | || !WPACKET_close(pkt) | |
982 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 983 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_ALPN, ERR_R_INTERNAL_ERROR); |
7da160b0 MC |
984 | return 0; |
985 | } | |
986 | ||
987 | return 1; | |
988 | } | |
989 | ||
990 | #ifndef OPENSSL_NO_SRTP | |
61138358 MC |
991 | int tls_construct_stoc_use_srtp(SSL *s, WPACKET *pkt, unsigned int context, |
992 | X509 *x, size_t chainidx, int *al) | |
7da160b0 MC |
993 | { |
994 | if (s->srtp_profile == NULL) | |
995 | return 1; | |
a1448c26 | 996 | |
7da160b0 MC |
997 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp) |
998 | || !WPACKET_start_sub_packet_u16(pkt) | |
999 | || !WPACKET_put_bytes_u16(pkt, 2) | |
1000 | || !WPACKET_put_bytes_u16(pkt, s->srtp_profile->id) | |
1001 | || !WPACKET_put_bytes_u8(pkt, 0) | |
1002 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 1003 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_USE_SRTP, ERR_R_INTERNAL_ERROR); |
7da160b0 MC |
1004 | return 0; |
1005 | } | |
1006 | ||
1007 | return 1; | |
1008 | } | |
1009 | #endif | |
1010 | ||
61138358 MC |
1011 | int tls_construct_stoc_etm(SSL *s, WPACKET *pkt, unsigned int context, X509 *x, |
1012 | size_t chainidx, int *al) | |
7da160b0 | 1013 | { |
28a31a0a | 1014 | if (!s->ext.use_etm) |
7da160b0 MC |
1015 | return 1; |
1016 | ||
1017 | /* | |
1018 | * Don't use encrypt_then_mac if AEAD or RC4 might want to disable | |
1019 | * for other cases too. | |
1020 | */ | |
1021 | if (s->s3->tmp.new_cipher->algorithm_mac == SSL_AEAD | |
1022 | || s->s3->tmp.new_cipher->algorithm_enc == SSL_RC4 | |
1023 | || s->s3->tmp.new_cipher->algorithm_enc == SSL_eGOST2814789CNT | |
1024 | || s->s3->tmp.new_cipher->algorithm_enc == SSL_eGOST2814789CNT12) { | |
28a31a0a | 1025 | s->ext.use_etm = 0; |
7da160b0 MC |
1026 | return 1; |
1027 | } | |
1028 | ||
1029 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac) | |
1030 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 1031 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_ETM, ERR_R_INTERNAL_ERROR); |
7da160b0 MC |
1032 | return 0; |
1033 | } | |
1034 | ||
1035 | return 1; | |
1036 | } | |
1037 | ||
61138358 MC |
1038 | int tls_construct_stoc_ems(SSL *s, WPACKET *pkt, unsigned int context, X509 *x, |
1039 | size_t chainidx, int *al) | |
7da160b0 MC |
1040 | { |
1041 | if ((s->s3->flags & TLS1_FLAGS_RECEIVED_EXTMS) == 0) | |
1042 | return 1; | |
1043 | ||
1044 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret) | |
1045 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 1046 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_EMS, ERR_R_INTERNAL_ERROR); |
7da160b0 MC |
1047 | return 0; |
1048 | } | |
1049 | ||
1050 | return 1; | |
1051 | } | |
1052 | ||
61138358 MC |
1053 | int tls_construct_stoc_key_share(SSL *s, WPACKET *pkt, unsigned int context, |
1054 | X509 *x, size_t chainidx, int *al) | |
7da160b0 | 1055 | { |
3cf96e88 | 1056 | #ifndef OPENSSL_NO_TLS1_3 |
7da160b0 MC |
1057 | unsigned char *encodedPoint; |
1058 | size_t encoded_pt_len = 0; | |
1059 | EVP_PKEY *ckey = s->s3->peer_tmp, *skey = NULL; | |
1060 | ||
7da160b0 | 1061 | if (ckey == NULL) { |
7d061fce MC |
1062 | /* No key_share received from client */ |
1063 | if (s->hello_retry_request) { | |
7d061fce | 1064 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) |
aff9929b MC |
1065 | || !WPACKET_start_sub_packet_u16(pkt) |
1066 | || !WPACKET_put_bytes_u16(pkt, s->s3->group_id) | |
1067 | || !WPACKET_close(pkt)) { | |
7d061fce MC |
1068 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, |
1069 | ERR_R_INTERNAL_ERROR); | |
1070 | return 0; | |
1071 | } | |
1072 | ||
1073 | return 1; | |
1074 | } | |
1075 | ||
1076 | /* Must be resuming. */ | |
0247086d MC |
1077 | if (!s->hit || !tls13_generate_handshake_secret(s, NULL, 0)) { |
1078 | *al = SSL_AD_INTERNAL_ERROR; | |
1079 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); | |
1080 | return 0; | |
1081 | } | |
1082 | return 1; | |
7da160b0 MC |
1083 | } |
1084 | ||
1085 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
1086 | || !WPACKET_start_sub_packet_u16(pkt) | |
1087 | || !WPACKET_put_bytes_u16(pkt, s->s3->group_id)) { | |
7fe97c07 | 1088 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
7da160b0 MC |
1089 | return 0; |
1090 | } | |
1091 | ||
1092 | skey = ssl_generate_pkey(ckey); | |
1093 | if (skey == NULL) { | |
7fe97c07 | 1094 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_MALLOC_FAILURE); |
7da160b0 MC |
1095 | return 0; |
1096 | } | |
1097 | ||
1098 | /* Generate encoding of server key */ | |
1099 | encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(skey, &encodedPoint); | |
1100 | if (encoded_pt_len == 0) { | |
7fe97c07 | 1101 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_EC_LIB); |
7da160b0 MC |
1102 | EVP_PKEY_free(skey); |
1103 | return 0; | |
1104 | } | |
1105 | ||
1106 | if (!WPACKET_sub_memcpy_u16(pkt, encodedPoint, encoded_pt_len) | |
1107 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 1108 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
7da160b0 MC |
1109 | EVP_PKEY_free(skey); |
1110 | OPENSSL_free(encodedPoint); | |
1111 | return 0; | |
1112 | } | |
1113 | OPENSSL_free(encodedPoint); | |
1114 | ||
1115 | /* This causes the crypto state to be updated based on the derived keys */ | |
1116 | s->s3->tmp.pkey = skey; | |
1117 | if (ssl_derive(s, skey, ckey, 1) == 0) { | |
7fe97c07 | 1118 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
7da160b0 MC |
1119 | return 0; |
1120 | } | |
3cf96e88 | 1121 | #endif |
7da160b0 MC |
1122 | |
1123 | return 1; | |
1124 | } | |
1125 | ||
61138358 MC |
1126 | int tls_construct_stoc_cryptopro_bug(SSL *s, WPACKET *pkt, unsigned int context, |
1127 | X509 *x, size_t chainidx, int *al) | |
7da160b0 MC |
1128 | { |
1129 | const unsigned char cryptopro_ext[36] = { | |
1130 | 0xfd, 0xe8, /* 65000 */ | |
1131 | 0x00, 0x20, /* 32 bytes length */ | |
1132 | 0x30, 0x1e, 0x30, 0x08, 0x06, 0x06, 0x2a, 0x85, | |
1133 | 0x03, 0x02, 0x02, 0x09, 0x30, 0x08, 0x06, 0x06, | |
1134 | 0x2a, 0x85, 0x03, 0x02, 0x02, 0x16, 0x30, 0x08, | |
1135 | 0x06, 0x06, 0x2a, 0x85, 0x03, 0x02, 0x02, 0x17 | |
1136 | }; | |
1137 | ||
1138 | if (((s->s3->tmp.new_cipher->id & 0xFFFF) != 0x80 | |
1139 | && (s->s3->tmp.new_cipher->id & 0xFFFF) != 0x81) | |
1140 | || (SSL_get_options(s) & SSL_OP_CRYPTOPRO_TLSEXT_BUG) == 0) | |
1141 | return 1; | |
1142 | ||
1143 | if (!WPACKET_memcpy(pkt, cryptopro_ext, sizeof(cryptopro_ext))) { | |
7fe97c07 | 1144 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_CRYPTOPRO_BUG, ERR_R_INTERNAL_ERROR); |
7da160b0 MC |
1145 | return 0; |
1146 | } | |
1147 | ||
1148 | return 1; | |
1149 | } | |
0247086d | 1150 | |
61138358 MC |
1151 | int tls_construct_stoc_psk(SSL *s, WPACKET *pkt, unsigned int context, X509 *x, |
1152 | size_t chainidx, int *al) | |
0247086d MC |
1153 | { |
1154 | if (!s->hit) | |
1155 | return 1; | |
1156 | ||
1157 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk) | |
1158 | || !WPACKET_start_sub_packet_u16(pkt) | |
1159 | || !WPACKET_put_bytes_u16(pkt, s->session->ext.tick_identity) | |
1160 | || !WPACKET_close(pkt)) { | |
1161 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_PSK, ERR_R_INTERNAL_ERROR); | |
1162 | return 0; | |
1163 | } | |
1164 | ||
1165 | return 1; | |
1166 | } |