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25670f3e | 1 | /* |
b186a592 | 2 | * Copyright 2016-2017 The OpenSSL Project Authors. All Rights Reserved. |
25670f3e MC |
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 | 27 | SSL_R_RENEGOTIATION_ENCODING_ERR); |
fb34a0f4 | 28 | *al = SSL_AD_DECODE_ERROR; |
25670f3e MC |
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)) { | |
fb34a0f4 | 157 | *al = SSL_AD_INTERNAL_ERROR; |
25670f3e MC |
158 | return 0; |
159 | } | |
160 | ||
161 | return 1; | |
162 | } | |
163 | #endif | |
164 | ||
165 | #ifndef OPENSSL_NO_EC | |
61138358 MC |
166 | int tls_parse_ctos_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context, |
167 | X509 *x, size_t chainidx, int *al) | |
25670f3e MC |
168 | { |
169 | PACKET ec_point_format_list; | |
170 | ||
171 | if (!PACKET_as_length_prefixed_1(pkt, &ec_point_format_list) | |
172 | || PACKET_remaining(&ec_point_format_list) == 0) { | |
173 | *al = SSL_AD_DECODE_ERROR; | |
174 | return 0; | |
175 | } | |
176 | ||
177 | if (!s->hit) { | |
178 | if (!PACKET_memdup(&ec_point_format_list, | |
aff8c126 RS |
179 | &s->session->ext.ecpointformats, |
180 | &s->session->ext.ecpointformats_len)) { | |
fb34a0f4 | 181 | *al = SSL_AD_INTERNAL_ERROR; |
25670f3e MC |
182 | return 0; |
183 | } | |
184 | } | |
185 | ||
186 | return 1; | |
187 | } | |
188 | #endif /* OPENSSL_NO_EC */ | |
189 | ||
61138358 MC |
190 | int tls_parse_ctos_session_ticket(SSL *s, PACKET *pkt, unsigned int context, |
191 | X509 *x, size_t chainidx, int *al) | |
25670f3e | 192 | { |
aff8c126 RS |
193 | if (s->ext.session_ticket_cb && |
194 | !s->ext.session_ticket_cb(s, PACKET_data(pkt), | |
195 | PACKET_remaining(pkt), | |
196 | s->ext.session_ticket_cb_arg)) { | |
fb34a0f4 | 197 | *al = SSL_AD_INTERNAL_ERROR; |
25670f3e MC |
198 | return 0; |
199 | } | |
200 | ||
201 | return 1; | |
202 | } | |
203 | ||
61138358 MC |
204 | int tls_parse_ctos_sig_algs(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
205 | size_t chainidx, int *al) | |
25670f3e MC |
206 | { |
207 | PACKET supported_sig_algs; | |
208 | ||
209 | if (!PACKET_as_length_prefixed_2(pkt, &supported_sig_algs) | |
25670f3e MC |
210 | || PACKET_remaining(&supported_sig_algs) == 0) { |
211 | *al = SSL_AD_DECODE_ERROR; | |
212 | return 0; | |
213 | } | |
214 | ||
703bcee0 | 215 | if (!s->hit && !tls1_save_sigalgs(s, &supported_sig_algs)) { |
fb34a0f4 | 216 | *al = SSL_AD_DECODE_ERROR; |
25670f3e MC |
217 | return 0; |
218 | } | |
219 | ||
220 | return 1; | |
221 | } | |
222 | ||
ab83e314 | 223 | #ifndef OPENSSL_NO_OCSP |
61138358 MC |
224 | int tls_parse_ctos_status_request(SSL *s, PACKET *pkt, unsigned int context, |
225 | X509 *x, size_t chainidx, int *al) | |
25670f3e | 226 | { |
1266eefd MC |
227 | PACKET responder_id_list, exts; |
228 | ||
e96e0f8e MC |
229 | /* Not defined if we get one of these in a client Certificate */ |
230 | if (x != NULL) | |
231 | return 1; | |
232 | ||
aff8c126 | 233 | if (!PACKET_get_1(pkt, (unsigned int *)&s->ext.status_type)) { |
25670f3e MC |
234 | *al = SSL_AD_DECODE_ERROR; |
235 | return 0; | |
236 | } | |
ab83e314 | 237 | |
aff8c126 | 238 | if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) { |
25670f3e | 239 | /* |
1266eefd | 240 | * We don't know what to do with any other type so ignore it. |
25670f3e | 241 | */ |
aff8c126 | 242 | s->ext.status_type = TLSEXT_STATUSTYPE_nothing; |
1266eefd MC |
243 | return 1; |
244 | } | |
25670f3e | 245 | |
1266eefd MC |
246 | if (!PACKET_get_length_prefixed_2 (pkt, &responder_id_list)) { |
247 | *al = SSL_AD_DECODE_ERROR; | |
248 | return 0; | |
249 | } | |
25670f3e | 250 | |
1266eefd MC |
251 | /* |
252 | * We remove any OCSP_RESPIDs from a previous handshake | |
253 | * to prevent unbounded memory growth - CVE-2016-6304 | |
254 | */ | |
aff8c126 | 255 | sk_OCSP_RESPID_pop_free(s->ext.ocsp.ids, OCSP_RESPID_free); |
1266eefd | 256 | if (PACKET_remaining(&responder_id_list) > 0) { |
aff8c126 RS |
257 | s->ext.ocsp.ids = sk_OCSP_RESPID_new_null(); |
258 | if (s->ext.ocsp.ids == NULL) { | |
1266eefd MC |
259 | *al = SSL_AD_INTERNAL_ERROR; |
260 | return 0; | |
261 | } | |
262 | } else { | |
aff8c126 | 263 | s->ext.ocsp.ids = NULL; |
1266eefd | 264 | } |
25670f3e | 265 | |
1266eefd MC |
266 | while (PACKET_remaining(&responder_id_list) > 0) { |
267 | OCSP_RESPID *id; | |
268 | PACKET responder_id; | |
269 | const unsigned char *id_data; | |
25670f3e | 270 | |
1266eefd MC |
271 | if (!PACKET_get_length_prefixed_2(&responder_id_list, &responder_id) |
272 | || PACKET_remaining(&responder_id) == 0) { | |
273 | *al = SSL_AD_DECODE_ERROR; | |
274 | return 0; | |
275 | } | |
25670f3e | 276 | |
1266eefd MC |
277 | id_data = PACKET_data(&responder_id); |
278 | /* TODO(size_t): Convert d2i_* to size_t */ | |
279 | id = d2i_OCSP_RESPID(NULL, &id_data, | |
280 | (int)PACKET_remaining(&responder_id)); | |
281 | if (id == NULL) { | |
282 | *al = SSL_AD_DECODE_ERROR; | |
283 | return 0; | |
25670f3e MC |
284 | } |
285 | ||
1266eefd MC |
286 | if (id_data != PACKET_end(&responder_id)) { |
287 | OCSP_RESPID_free(id); | |
25670f3e MC |
288 | *al = SSL_AD_DECODE_ERROR; |
289 | return 0; | |
290 | } | |
291 | ||
aff8c126 | 292 | if (!sk_OCSP_RESPID_push(s->ext.ocsp.ids, id)) { |
1266eefd MC |
293 | OCSP_RESPID_free(id); |
294 | *al = SSL_AD_INTERNAL_ERROR; | |
295 | return 0; | |
296 | } | |
297 | } | |
298 | ||
299 | /* Read in request_extensions */ | |
300 | if (!PACKET_as_length_prefixed_2(pkt, &exts)) { | |
301 | *al = SSL_AD_DECODE_ERROR; | |
302 | return 0; | |
303 | } | |
304 | ||
305 | if (PACKET_remaining(&exts) > 0) { | |
306 | const unsigned char *ext_data = PACKET_data(&exts); | |
307 | ||
aff8c126 | 308 | sk_X509_EXTENSION_pop_free(s->ext.ocsp.exts, |
1266eefd | 309 | X509_EXTENSION_free); |
aff8c126 | 310 | s->ext.ocsp.exts = |
1266eefd | 311 | d2i_X509_EXTENSIONS(NULL, &ext_data, (int)PACKET_remaining(&exts)); |
aff8c126 | 312 | if (s->ext.ocsp.exts == NULL || ext_data != PACKET_end(&exts)) { |
1266eefd MC |
313 | *al = SSL_AD_DECODE_ERROR; |
314 | return 0; | |
25670f3e | 315 | } |
25670f3e MC |
316 | } |
317 | ||
318 | return 1; | |
319 | } | |
ab83e314 | 320 | #endif |
25670f3e MC |
321 | |
322 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
61138358 MC |
323 | int tls_parse_ctos_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
324 | size_t chainidx, int *al) | |
25670f3e | 325 | { |
1266eefd MC |
326 | /* |
327 | * We shouldn't accept this extension on a | |
328 | * renegotiation. | |
1266eefd | 329 | */ |
c7f47786 | 330 | if (SSL_IS_FIRST_HANDSHAKE(s)) |
aff8c126 | 331 | s->s3->npn_seen = 1; |
25670f3e MC |
332 | |
333 | return 1; | |
334 | } | |
335 | #endif | |
336 | ||
337 | /* | |
1266eefd MC |
338 | * Save the ALPN extension in a ClientHello.|pkt| holds the contents of the ALPN |
339 | * extension, not including type and length. |al| is a pointer to the alert | |
340 | * value to send in the event of a failure. Returns: 1 on success, 0 on error. | |
25670f3e | 341 | */ |
61138358 MC |
342 | int tls_parse_ctos_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
343 | size_t chainidx, int *al) | |
25670f3e MC |
344 | { |
345 | PACKET protocol_list, save_protocol_list, protocol; | |
346 | ||
c7f47786 | 347 | if (!SSL_IS_FIRST_HANDSHAKE(s)) |
25670f3e MC |
348 | return 1; |
349 | ||
350 | if (!PACKET_as_length_prefixed_2(pkt, &protocol_list) | |
351 | || PACKET_remaining(&protocol_list) < 2) { | |
352 | *al = SSL_AD_DECODE_ERROR; | |
353 | return 0; | |
354 | } | |
355 | ||
356 | save_protocol_list = protocol_list; | |
357 | do { | |
358 | /* Protocol names can't be empty. */ | |
359 | if (!PACKET_get_length_prefixed_1(&protocol_list, &protocol) | |
360 | || PACKET_remaining(&protocol) == 0) { | |
361 | *al = SSL_AD_DECODE_ERROR; | |
362 | return 0; | |
363 | } | |
364 | } while (PACKET_remaining(&protocol_list) != 0); | |
365 | ||
7d061fce MC |
366 | OPENSSL_free(s->s3->alpn_proposed); |
367 | s->s3->alpn_proposed = NULL; | |
368 | s->s3->alpn_proposed_len = 0; | |
25670f3e MC |
369 | if (!PACKET_memdup(&save_protocol_list, |
370 | &s->s3->alpn_proposed, &s->s3->alpn_proposed_len)) { | |
fb34a0f4 | 371 | *al = SSL_AD_INTERNAL_ERROR; |
25670f3e MC |
372 | return 0; |
373 | } | |
374 | ||
375 | return 1; | |
376 | } | |
377 | ||
378 | #ifndef OPENSSL_NO_SRTP | |
61138358 MC |
379 | int tls_parse_ctos_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
380 | size_t chainidx, int *al) | |
25670f3e | 381 | { |
25670f3e MC |
382 | STACK_OF(SRTP_PROTECTION_PROFILE) *srvr; |
383 | unsigned int ct, mki_len, id; | |
384 | int i, srtp_pref; | |
385 | PACKET subpkt; | |
386 | ||
387 | /* Ignore this if we have no SRTP profiles */ | |
388 | if (SSL_get_srtp_profiles(s) == NULL) | |
389 | return 1; | |
390 | ||
391 | /* Pull off the length of the cipher suite list and check it is even */ | |
1266eefd MC |
392 | if (!PACKET_get_net_2(pkt, &ct) || (ct & 1) != 0 |
393 | || !PACKET_get_sub_packet(pkt, &subpkt, ct)) { | |
7fe97c07 | 394 | SSLerr(SSL_F_TLS_PARSE_CTOS_USE_SRTP, |
25670f3e MC |
395 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
396 | *al = SSL_AD_DECODE_ERROR; | |
397 | return 0; | |
398 | } | |
399 | ||
400 | srvr = SSL_get_srtp_profiles(s); | |
401 | s->srtp_profile = NULL; | |
402 | /* Search all profiles for a match initially */ | |
403 | srtp_pref = sk_SRTP_PROTECTION_PROFILE_num(srvr); | |
404 | ||
405 | while (PACKET_remaining(&subpkt)) { | |
406 | if (!PACKET_get_net_2(&subpkt, &id)) { | |
7fe97c07 | 407 | SSLerr(SSL_F_TLS_PARSE_CTOS_USE_SRTP, |
25670f3e MC |
408 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
409 | *al = SSL_AD_DECODE_ERROR; | |
410 | return 0; | |
411 | } | |
412 | ||
413 | /* | |
414 | * Only look for match in profiles of higher preference than | |
415 | * current match. | |
416 | * If no profiles have been have been configured then this | |
417 | * does nothing. | |
418 | */ | |
419 | for (i = 0; i < srtp_pref; i++) { | |
d270de32 | 420 | SRTP_PROTECTION_PROFILE *sprof = |
1266eefd MC |
421 | sk_SRTP_PROTECTION_PROFILE_value(srvr, i); |
422 | ||
25670f3e MC |
423 | if (sprof->id == id) { |
424 | s->srtp_profile = sprof; | |
425 | srtp_pref = i; | |
426 | break; | |
427 | } | |
428 | } | |
429 | } | |
430 | ||
1266eefd | 431 | /* Now extract the MKI value as a sanity check, but discard it for now */ |
25670f3e | 432 | if (!PACKET_get_1(pkt, &mki_len)) { |
7fe97c07 | 433 | SSLerr(SSL_F_TLS_PARSE_CTOS_USE_SRTP, |
25670f3e MC |
434 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
435 | *al = SSL_AD_DECODE_ERROR; | |
436 | return 0; | |
437 | } | |
438 | ||
439 | if (!PACKET_forward(pkt, mki_len) | |
440 | || PACKET_remaining(pkt)) { | |
7fe97c07 | 441 | SSLerr(SSL_F_TLS_PARSE_CTOS_USE_SRTP, SSL_R_BAD_SRTP_MKI_VALUE); |
25670f3e MC |
442 | *al = SSL_AD_DECODE_ERROR; |
443 | return 0; | |
444 | } | |
445 | ||
446 | return 1; | |
447 | } | |
448 | #endif | |
449 | ||
61138358 MC |
450 | int tls_parse_ctos_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
451 | size_t chainidx, int *al) | |
25670f3e MC |
452 | { |
453 | if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC)) | |
28a31a0a | 454 | s->ext.use_etm = 1; |
25670f3e MC |
455 | |
456 | return 1; | |
457 | } | |
458 | ||
b2f7e8c0 MC |
459 | /* |
460 | * Process a psk_kex_modes extension received in the ClientHello. |pkt| contains | |
461 | * the raw PACKET data for the extension. Returns 1 on success or 0 on failure. | |
462 | * If a failure occurs then |*al| is set to an appropriate alert value. | |
463 | */ | |
61138358 MC |
464 | int tls_parse_ctos_psk_kex_modes(SSL *s, PACKET *pkt, unsigned int context, |
465 | X509 *x, size_t chainidx, int *al) | |
b2f7e8c0 MC |
466 | { |
467 | #ifndef OPENSSL_NO_TLS1_3 | |
468 | PACKET psk_kex_modes; | |
469 | unsigned int mode; | |
470 | ||
471 | if (!PACKET_as_length_prefixed_1(pkt, &psk_kex_modes) | |
472 | || PACKET_remaining(&psk_kex_modes) == 0) { | |
473 | *al = SSL_AD_DECODE_ERROR; | |
474 | return 0; | |
475 | } | |
476 | ||
477 | while (PACKET_get_1(&psk_kex_modes, &mode)) { | |
478 | if (mode == TLSEXT_KEX_MODE_KE_DHE) | |
479 | s->ext.psk_kex_mode |= TLSEXT_KEX_MODE_FLAG_KE_DHE; | |
e3c0d76b MC |
480 | else if (mode == TLSEXT_KEX_MODE_KE |
481 | && (s->options & SSL_OP_ALLOW_NO_DHE_KEX) != 0) | |
b2f7e8c0 MC |
482 | s->ext.psk_kex_mode |= TLSEXT_KEX_MODE_FLAG_KE; |
483 | } | |
484 | #endif | |
485 | ||
486 | return 1; | |
487 | } | |
488 | ||
25670f3e MC |
489 | /* |
490 | * Process a key_share extension received in the ClientHello. |pkt| contains | |
491 | * the raw PACKET data for the extension. Returns 1 on success or 0 on failure. | |
492 | * If a failure occurs then |*al| is set to an appropriate alert value. | |
493 | */ | |
61138358 MC |
494 | int tls_parse_ctos_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
495 | size_t chainidx, int *al) | |
25670f3e | 496 | { |
3cf96e88 | 497 | #ifndef OPENSSL_NO_TLS1_3 |
25670f3e MC |
498 | unsigned int group_id; |
499 | PACKET key_share_list, encoded_pt; | |
500 | const unsigned char *clntcurves, *srvrcurves; | |
501 | size_t clnt_num_curves, srvr_num_curves; | |
502 | int group_nid, found = 0; | |
503 | unsigned int curve_flags; | |
504 | ||
f4bbb37c | 505 | if (s->hit && (s->ext.psk_kex_mode & TLSEXT_KEX_MODE_FLAG_KE_DHE) == 0) |
25670f3e MC |
506 | return 1; |
507 | ||
508 | /* Sanity check */ | |
509 | if (s->s3->peer_tmp != NULL) { | |
510 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 511 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
512 | return 0; |
513 | } | |
514 | ||
515 | if (!PACKET_as_length_prefixed_2(pkt, &key_share_list)) { | |
721586ea | 516 | *al = SSL_AD_DECODE_ERROR; |
7fe97c07 | 517 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, SSL_R_LENGTH_MISMATCH); |
25670f3e MC |
518 | return 0; |
519 | } | |
520 | ||
521 | /* Get our list of supported curves */ | |
522 | if (!tls1_get_curvelist(s, 0, &srvrcurves, &srvr_num_curves)) { | |
523 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 524 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
525 | return 0; |
526 | } | |
527 | ||
b6fdc12d | 528 | /* Get the clients list of supported curves. */ |
25670f3e MC |
529 | if (!tls1_get_curvelist(s, 1, &clntcurves, &clnt_num_curves)) { |
530 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 531 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
532 | return 0; |
533 | } | |
b6fdc12d MC |
534 | if (clnt_num_curves == 0) { |
535 | /* | |
536 | * This can only happen if the supported_groups extension was not sent, | |
537 | * because we verify that the length is non-zero when we process that | |
538 | * extension. | |
539 | */ | |
540 | *al = SSL_AD_MISSING_EXTENSION; | |
541 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, | |
542 | SSL_R_MISSING_SUPPORTED_GROUPS_EXTENSION); | |
543 | return 0; | |
544 | } | |
25670f3e MC |
545 | |
546 | while (PACKET_remaining(&key_share_list) > 0) { | |
547 | if (!PACKET_get_net_2(&key_share_list, &group_id) | |
548 | || !PACKET_get_length_prefixed_2(&key_share_list, &encoded_pt) | |
549 | || PACKET_remaining(&encoded_pt) == 0) { | |
721586ea | 550 | *al = SSL_AD_DECODE_ERROR; |
7fe97c07 | 551 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, |
25670f3e MC |
552 | SSL_R_LENGTH_MISMATCH); |
553 | return 0; | |
554 | } | |
555 | ||
556 | /* | |
557 | * If we already found a suitable key_share we loop through the | |
558 | * rest to verify the structure, but don't process them. | |
559 | */ | |
560 | if (found) | |
561 | continue; | |
562 | ||
563 | /* Check if this share is in supported_groups sent from client */ | |
564 | if (!check_in_list(s, group_id, clntcurves, clnt_num_curves, 0)) { | |
721586ea | 565 | *al = SSL_AD_ILLEGAL_PARAMETER; |
7fe97c07 | 566 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, SSL_R_BAD_KEY_SHARE); |
25670f3e MC |
567 | return 0; |
568 | } | |
569 | ||
570 | /* Check if this share is for a group we can use */ | |
571 | if (!check_in_list(s, group_id, srvrcurves, srvr_num_curves, 1)) { | |
572 | /* Share not suitable */ | |
573 | continue; | |
574 | } | |
575 | ||
576 | group_nid = tls1_ec_curve_id2nid(group_id, &curve_flags); | |
577 | ||
578 | if (group_nid == 0) { | |
579 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 580 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, |
25670f3e MC |
581 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
582 | return 0; | |
583 | } | |
584 | ||
585 | if ((curve_flags & TLS_CURVE_TYPE) == TLS_CURVE_CUSTOM) { | |
586 | /* Can happen for some curves, e.g. X25519 */ | |
587 | EVP_PKEY *key = EVP_PKEY_new(); | |
588 | ||
589 | if (key == NULL || !EVP_PKEY_set_type(key, group_nid)) { | |
590 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 591 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, ERR_R_EVP_LIB); |
25670f3e MC |
592 | EVP_PKEY_free(key); |
593 | return 0; | |
594 | } | |
595 | s->s3->peer_tmp = key; | |
596 | } else { | |
597 | /* Set up EVP_PKEY with named curve as parameters */ | |
598 | EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL); | |
1266eefd | 599 | |
25670f3e MC |
600 | if (pctx == NULL |
601 | || EVP_PKEY_paramgen_init(pctx) <= 0 | |
602 | || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, | |
603 | group_nid) <= 0 | |
604 | || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) { | |
605 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 606 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, ERR_R_EVP_LIB); |
25670f3e MC |
607 | EVP_PKEY_CTX_free(pctx); |
608 | return 0; | |
609 | } | |
610 | EVP_PKEY_CTX_free(pctx); | |
611 | pctx = NULL; | |
612 | } | |
613 | s->s3->group_id = group_id; | |
614 | ||
615 | if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp, | |
616 | PACKET_data(&encoded_pt), | |
617 | PACKET_remaining(&encoded_pt))) { | |
fb34a0f4 | 618 | *al = SSL_AD_ILLEGAL_PARAMETER; |
7fe97c07 | 619 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, SSL_R_BAD_ECPOINT); |
25670f3e MC |
620 | return 0; |
621 | } | |
622 | ||
623 | found = 1; | |
624 | } | |
3cf96e88 | 625 | #endif |
25670f3e MC |
626 | |
627 | return 1; | |
628 | } | |
629 | ||
630 | #ifndef OPENSSL_NO_EC | |
61138358 MC |
631 | int tls_parse_ctos_supported_groups(SSL *s, PACKET *pkt, unsigned int context, |
632 | X509 *x, size_t chainidx, int *al) | |
25670f3e MC |
633 | { |
634 | PACKET supported_groups_list; | |
635 | ||
636 | /* Each group is 2 bytes and we must have at least 1. */ | |
637 | if (!PACKET_as_length_prefixed_2(pkt, &supported_groups_list) | |
638 | || PACKET_remaining(&supported_groups_list) == 0 | |
639 | || (PACKET_remaining(&supported_groups_list) % 2) != 0) { | |
640 | *al = SSL_AD_DECODE_ERROR; | |
641 | return 0; | |
642 | } | |
643 | ||
7d061fce MC |
644 | OPENSSL_free(s->session->ext.supportedgroups); |
645 | s->session->ext.supportedgroups = NULL; | |
646 | s->session->ext.supportedgroups_len = 0; | |
1053a6e2 MC |
647 | if (!PACKET_memdup(&supported_groups_list, |
648 | &s->session->ext.supportedgroups, | |
649 | &s->session->ext.supportedgroups_len)) { | |
fb34a0f4 | 650 | *al = SSL_AD_INTERNAL_ERROR; |
25670f3e MC |
651 | return 0; |
652 | } | |
653 | ||
654 | return 1; | |
655 | } | |
656 | #endif | |
657 | ||
61138358 MC |
658 | int tls_parse_ctos_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
659 | size_t chainidx, int *al) | |
25670f3e MC |
660 | { |
661 | /* The extension must always be empty */ | |
662 | if (PACKET_remaining(pkt) != 0) { | |
663 | *al = SSL_AD_DECODE_ERROR; | |
664 | return 0; | |
665 | } | |
666 | ||
667 | s->s3->flags |= TLS1_FLAGS_RECEIVED_EXTMS; | |
668 | ||
669 | return 1; | |
670 | } | |
7da160b0 | 671 | |
38df5a45 MC |
672 | |
673 | int tls_parse_ctos_early_data(SSL *s, PACKET *pkt, unsigned int context, | |
674 | X509 *x, size_t chainidx, int *al) | |
675 | { | |
676 | if (PACKET_remaining(pkt) != 0) { | |
677 | *al = SSL_AD_DECODE_ERROR; | |
678 | return 0; | |
679 | } | |
680 | ||
681 | return 1; | |
682 | } | |
683 | ||
61138358 MC |
684 | int tls_parse_ctos_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
685 | size_t chainidx, int *al) | |
1053a6e2 MC |
686 | { |
687 | PACKET identities, binders, binder; | |
688 | size_t binderoffset, hashsize; | |
689 | SSL_SESSION *sess = NULL; | |
3a7c56b2 | 690 | unsigned int id, i, ext = 0; |
1053a6e2 MC |
691 | const EVP_MD *md = NULL; |
692 | ||
1a9f457c MC |
693 | /* |
694 | * If we have no PSK kex mode that we recognise then we can't resume so | |
695 | * ignore this extension | |
696 | */ | |
697 | if ((s->ext.psk_kex_mode | |
698 | & (TLSEXT_KEX_MODE_FLAG_KE | TLSEXT_KEX_MODE_FLAG_KE_DHE)) == 0) | |
699 | return 1; | |
700 | ||
1053a6e2 MC |
701 | if (!PACKET_get_length_prefixed_2(pkt, &identities)) { |
702 | *al = SSL_AD_DECODE_ERROR; | |
703 | return 0; | |
704 | } | |
705 | ||
706 | for (id = 0; PACKET_remaining(&identities) != 0; id++) { | |
707 | PACKET identity; | |
2c604cb9 | 708 | unsigned long ticket_agel; |
1053a6e2 MC |
709 | |
710 | if (!PACKET_get_length_prefixed_2(&identities, &identity) | |
2c604cb9 | 711 | || !PACKET_get_net_4(&identities, &ticket_agel)) { |
1053a6e2 MC |
712 | *al = SSL_AD_DECODE_ERROR; |
713 | return 0; | |
714 | } | |
715 | ||
3a7c56b2 | 716 | if (s->psk_find_session_cb != NULL |
011d768a MC |
717 | && !s->psk_find_session_cb(s, PACKET_data(&identity), |
718 | PACKET_remaining(&identity), | |
719 | &sess)) { | |
720 | *al = SSL_AD_INTERNAL_ERROR; | |
721 | return 0; | |
722 | } | |
723 | ||
724 | if (sess != NULL) { | |
725 | /* We found a PSK */ | |
3a7c56b2 | 726 | SSL_SESSION *sesstmp = ssl_session_dup(sess, 0); |
1b8bacff | 727 | |
3a7c56b2 MC |
728 | if (sesstmp == NULL) { |
729 | *al = SSL_AD_INTERNAL_ERROR; | |
730 | return 0; | |
731 | } | |
732 | SSL_SESSION_free(sess); | |
733 | sess = sesstmp; | |
734 | ||
735 | /* | |
736 | * We've just been told to use this session for this context so | |
737 | * make sure the sid_ctx matches up. | |
738 | */ | |
739 | memcpy(sess->sid_ctx, s->sid_ctx, s->sid_ctx_length); | |
740 | sess->sid_ctx_length = s->sid_ctx_length; | |
741 | ext = 1; | |
742 | } else { | |
743 | uint32_t ticket_age = 0, now, agesec, agems; | |
744 | int ret = tls_decrypt_ticket(s, PACKET_data(&identity), | |
745 | PACKET_remaining(&identity), NULL, 0, | |
746 | &sess); | |
747 | ||
748 | if (ret == TICKET_FATAL_ERR_MALLOC | |
749 | || ret == TICKET_FATAL_ERR_OTHER) { | |
750 | *al = SSL_AD_INTERNAL_ERROR; | |
751 | return 0; | |
752 | } | |
753 | if (ret == TICKET_NO_DECRYPT) | |
754 | continue; | |
755 | ||
756 | ticket_age = (uint32_t)ticket_agel; | |
757 | now = (uint32_t)time(NULL); | |
758 | agesec = now - (uint32_t)sess->time; | |
759 | agems = agesec * (uint32_t)1000; | |
760 | ticket_age -= sess->ext.tick_age_add; | |
761 | ||
762 | /* | |
763 | * For simplicity we do our age calculations in seconds. If the | |
764 | * client does it in ms then it could appear that their ticket age | |
765 | * is longer than ours (our ticket age calculation should always be | |
766 | * slightly longer than the client's due to the network latency). | |
767 | * Therefore we add 1000ms to our age calculation to adjust for | |
768 | * rounding errors. | |
769 | */ | |
770 | if (sess->timeout >= (long)agesec | |
771 | && agems / (uint32_t)1000 == agesec | |
772 | && ticket_age <= agems + 1000 | |
773 | && ticket_age + TICKET_AGE_ALLOWANCE >= agems + 1000) { | |
774 | /* | |
775 | * Ticket age is within tolerance and not expired. We allow it | |
776 | * for early data | |
777 | */ | |
778 | s->ext.early_data_ok = 1; | |
779 | } | |
1053a6e2 | 780 | } |
1053a6e2 | 781 | |
534a43ff | 782 | md = ssl_md(sess->cipher->algorithm2); |
0de6d66d MC |
783 | if (md != ssl_md(s->s3->tmp.new_cipher->algorithm2)) { |
784 | /* The ciphersuite is not compatible with this session. */ | |
1053a6e2 MC |
785 | SSL_SESSION_free(sess); |
786 | sess = NULL; | |
787 | continue; | |
788 | } | |
1053a6e2 MC |
789 | break; |
790 | } | |
791 | ||
792 | if (sess == NULL) | |
793 | return 1; | |
794 | ||
795 | binderoffset = PACKET_data(pkt) - (const unsigned char *)s->init_buf->data; | |
1053a6e2 MC |
796 | hashsize = EVP_MD_size(md); |
797 | ||
798 | if (!PACKET_get_length_prefixed_2(pkt, &binders)) { | |
799 | *al = SSL_AD_DECODE_ERROR; | |
800 | goto err; | |
801 | } | |
802 | ||
803 | for (i = 0; i <= id; i++) { | |
804 | if (!PACKET_get_length_prefixed_1(&binders, &binder)) { | |
805 | *al = SSL_AD_DECODE_ERROR; | |
806 | goto err; | |
807 | } | |
808 | } | |
809 | ||
810 | if (PACKET_remaining(&binder) != hashsize | |
811 | || tls_psk_do_binder(s, md, | |
812 | (const unsigned char *)s->init_buf->data, | |
813 | binderoffset, PACKET_data(&binder), NULL, | |
3a7c56b2 | 814 | sess, 0, ext) != 1) { |
1053a6e2 MC |
815 | *al = SSL_AD_DECODE_ERROR; |
816 | SSLerr(SSL_F_TLS_PARSE_CTOS_PSK, ERR_R_INTERNAL_ERROR); | |
817 | goto err; | |
818 | } | |
819 | ||
820 | sess->ext.tick_identity = id; | |
2c604cb9 | 821 | |
1053a6e2 MC |
822 | SSL_SESSION_free(s->session); |
823 | s->session = sess; | |
1053a6e2 MC |
824 | return 1; |
825 | err: | |
312e9387 | 826 | SSL_SESSION_free(sess); |
1053a6e2 MC |
827 | return 0; |
828 | } | |
829 | ||
1266eefd MC |
830 | /* |
831 | * Add the server's renegotiation binding | |
832 | */ | |
b186a592 MC |
833 | EXT_RETURN tls_construct_stoc_renegotiate(SSL *s, WPACKET *pkt, |
834 | unsigned int context, X509 *x, | |
835 | size_t chainidx, int *al) | |
7da160b0 MC |
836 | { |
837 | if (!s->s3->send_connection_binding) | |
b186a592 | 838 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 839 | |
db0f35dd | 840 | /* Still add this even if SSL_OP_NO_RENEGOTIATION is set */ |
7da160b0 MC |
841 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_renegotiate) |
842 | || !WPACKET_start_sub_packet_u16(pkt) | |
843 | || !WPACKET_start_sub_packet_u8(pkt) | |
844 | || !WPACKET_memcpy(pkt, s->s3->previous_client_finished, | |
845 | s->s3->previous_client_finished_len) | |
846 | || !WPACKET_memcpy(pkt, s->s3->previous_server_finished, | |
847 | s->s3->previous_server_finished_len) | |
848 | || !WPACKET_close(pkt) | |
849 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 850 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_RENEGOTIATE, ERR_R_INTERNAL_ERROR); |
b186a592 | 851 | return EXT_RETURN_FAIL; |
7da160b0 MC |
852 | } |
853 | ||
b186a592 | 854 | return EXT_RETURN_SENT; |
7da160b0 MC |
855 | } |
856 | ||
b186a592 MC |
857 | EXT_RETURN tls_construct_stoc_server_name(SSL *s, WPACKET *pkt, |
858 | unsigned int context, X509 *x, | |
859 | size_t chainidx, int *al) | |
7da160b0 MC |
860 | { |
861 | if (s->hit || s->servername_done != 1 | |
aff8c126 | 862 | || s->session->ext.hostname == NULL) |
b186a592 | 863 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
864 | |
865 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_server_name) | |
866 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 867 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_SERVER_NAME, ERR_R_INTERNAL_ERROR); |
b186a592 | 868 | return EXT_RETURN_FAIL; |
7da160b0 MC |
869 | } |
870 | ||
b186a592 | 871 | return EXT_RETURN_SENT; |
7da160b0 MC |
872 | } |
873 | ||
874 | #ifndef OPENSSL_NO_EC | |
b186a592 MC |
875 | EXT_RETURN tls_construct_stoc_ec_pt_formats(SSL *s, WPACKET *pkt, |
876 | unsigned int context, X509 *x, | |
877 | size_t chainidx, int *al) | |
7da160b0 MC |
878 | { |
879 | unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
880 | unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
89247375 | 881 | int using_ecc = ((alg_k & SSL_kECDHE) || (alg_a & SSL_aECDSA)) |
aff8c126 | 882 | && (s->session->ext.ecpointformats != NULL); |
7da160b0 MC |
883 | const unsigned char *plist; |
884 | size_t plistlen; | |
885 | ||
886 | if (!using_ecc) | |
b186a592 | 887 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
888 | |
889 | tls1_get_formatlist(s, &plist, &plistlen); | |
7da160b0 MC |
890 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_ec_point_formats) |
891 | || !WPACKET_start_sub_packet_u16(pkt) | |
892 | || !WPACKET_sub_memcpy_u8(pkt, plist, plistlen) | |
893 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 894 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR); |
b186a592 | 895 | return EXT_RETURN_FAIL; |
7da160b0 MC |
896 | } |
897 | ||
b186a592 | 898 | return EXT_RETURN_SENT; |
7da160b0 MC |
899 | } |
900 | #endif | |
901 | ||
cf53cbea | 902 | #ifndef OPENSSL_NO_EC |
b186a592 MC |
903 | EXT_RETURN tls_construct_stoc_supported_groups(SSL *s, WPACKET *pkt, |
904 | unsigned int context, X509 *x, | |
905 | size_t chainidx, int *al) | |
6af87546 MC |
906 | { |
907 | const unsigned char *groups; | |
908 | size_t numgroups, i, first = 1; | |
909 | ||
910 | /* s->s3->group_id is non zero if we accepted a key_share */ | |
911 | if (s->s3->group_id == 0) | |
b186a592 | 912 | return EXT_RETURN_NOT_SENT; |
6af87546 MC |
913 | |
914 | /* Get our list of supported groups */ | |
915 | if (!tls1_get_curvelist(s, 0, &groups, &numgroups) || numgroups == 0) { | |
916 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS, ERR_R_INTERNAL_ERROR); | |
b186a592 | 917 | return EXT_RETURN_FAIL; |
6af87546 MC |
918 | } |
919 | ||
920 | /* Copy group ID if supported */ | |
921 | for (i = 0; i < numgroups; i++, groups += 2) { | |
922 | if (tls_curve_allowed(s, groups, SSL_SECOP_CURVE_SUPPORTED)) { | |
923 | if (first) { | |
924 | /* | |
925 | * Check if the client is already using our preferred group. If | |
926 | * so we don't need to add this extension | |
927 | */ | |
928 | if (s->s3->group_id == GET_GROUP_ID(groups, 0)) | |
b186a592 | 929 | return EXT_RETURN_NOT_SENT; |
6af87546 MC |
930 | |
931 | /* Add extension header */ | |
932 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_groups) | |
933 | /* Sub-packet for supported_groups extension */ | |
934 | || !WPACKET_start_sub_packet_u16(pkt) | |
935 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
936 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS, | |
937 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 938 | return EXT_RETURN_FAIL; |
6af87546 MC |
939 | } |
940 | ||
941 | first = 0; | |
942 | } | |
12635aa0 | 943 | if (!WPACKET_put_bytes_u16(pkt, GET_GROUP_ID(groups, 0))) { |
6af87546 MC |
944 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS, |
945 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 946 | return EXT_RETURN_FAIL; |
6af87546 MC |
947 | } |
948 | } | |
949 | } | |
950 | ||
951 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
952 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS, ERR_R_INTERNAL_ERROR); | |
b186a592 | 953 | return EXT_RETURN_FAIL; |
6af87546 MC |
954 | } |
955 | ||
b186a592 | 956 | return EXT_RETURN_SENT; |
6af87546 | 957 | } |
cf53cbea | 958 | #endif |
6af87546 | 959 | |
b186a592 MC |
960 | EXT_RETURN tls_construct_stoc_session_ticket(SSL *s, WPACKET *pkt, |
961 | unsigned int context, X509 *x, | |
962 | size_t chainidx, int *al) | |
7da160b0 | 963 | { |
aff8c126 RS |
964 | if (!s->ext.ticket_expected || !tls_use_ticket(s)) { |
965 | s->ext.ticket_expected = 0; | |
b186a592 | 966 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
967 | } |
968 | ||
969 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket) | |
970 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 971 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_SESSION_TICKET, ERR_R_INTERNAL_ERROR); |
b186a592 | 972 | return EXT_RETURN_FAIL; |
7da160b0 MC |
973 | } |
974 | ||
b186a592 | 975 | return EXT_RETURN_SENT; |
7da160b0 MC |
976 | } |
977 | ||
ab83e314 | 978 | #ifndef OPENSSL_NO_OCSP |
b186a592 MC |
979 | EXT_RETURN tls_construct_stoc_status_request(SSL *s, WPACKET *pkt, |
980 | unsigned int context, X509 *x, | |
981 | size_t chainidx, int *al) | |
7da160b0 | 982 | { |
aff8c126 | 983 | if (!s->ext.status_expected) |
b186a592 | 984 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 985 | |
8521ced6 | 986 | if (SSL_IS_TLS13(s) && chainidx != 0) |
b186a592 | 987 | return EXT_RETURN_NOT_SENT; |
e96e0f8e | 988 | |
7da160b0 | 989 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request) |
f63e4288 MC |
990 | || !WPACKET_start_sub_packet_u16(pkt)) { |
991 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); | |
b186a592 | 992 | return EXT_RETURN_FAIL; |
f63e4288 MC |
993 | } |
994 | ||
995 | /* | |
996 | * In TLSv1.3 we include the certificate status itself. In <= TLSv1.2 we | |
997 | * send back an empty extension, with the certificate status appearing as a | |
998 | * separate message | |
999 | */ | |
1000 | if ((SSL_IS_TLS13(s) && !tls_construct_cert_status_body(s, pkt)) | |
1001 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 1002 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); |
b186a592 | 1003 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1004 | } |
1005 | ||
b186a592 | 1006 | return EXT_RETURN_SENT; |
7da160b0 | 1007 | } |
ab83e314 | 1008 | #endif |
7da160b0 | 1009 | |
7da160b0 | 1010 | #ifndef OPENSSL_NO_NEXTPROTONEG |
b186a592 MC |
1011 | EXT_RETURN tls_construct_stoc_next_proto_neg(SSL *s, WPACKET *pkt, |
1012 | unsigned int context, X509 *x, | |
1013 | size_t chainidx, int *al) | |
7da160b0 MC |
1014 | { |
1015 | const unsigned char *npa; | |
1016 | unsigned int npalen; | |
1017 | int ret; | |
aff8c126 | 1018 | int npn_seen = s->s3->npn_seen; |
7da160b0 | 1019 | |
aff8c126 RS |
1020 | s->s3->npn_seen = 0; |
1021 | if (!npn_seen || s->ctx->ext.npn_advertised_cb == NULL) | |
b186a592 | 1022 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 1023 | |
aff8c126 RS |
1024 | ret = s->ctx->ext.npn_advertised_cb(s, &npa, &npalen, |
1025 | s->ctx->ext.npn_advertised_cb_arg); | |
7da160b0 MC |
1026 | if (ret == SSL_TLSEXT_ERR_OK) { |
1027 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_next_proto_neg) | |
1028 | || !WPACKET_sub_memcpy_u16(pkt, npa, npalen)) { | |
7fe97c07 | 1029 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_NEXT_PROTO_NEG, |
7da160b0 | 1030 | ERR_R_INTERNAL_ERROR); |
b186a592 | 1031 | return EXT_RETURN_FAIL; |
7da160b0 | 1032 | } |
aff8c126 | 1033 | s->s3->npn_seen = 1; |
7da160b0 MC |
1034 | } |
1035 | ||
b186a592 | 1036 | return EXT_RETURN_SENT; |
7da160b0 MC |
1037 | } |
1038 | #endif | |
1039 | ||
b186a592 MC |
1040 | EXT_RETURN tls_construct_stoc_alpn(SSL *s, WPACKET *pkt, unsigned int context, |
1041 | X509 *x, size_t chainidx, int *al) | |
7da160b0 MC |
1042 | { |
1043 | if (s->s3->alpn_selected == NULL) | |
b186a592 | 1044 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1045 | |
1046 | if (!WPACKET_put_bytes_u16(pkt, | |
1047 | TLSEXT_TYPE_application_layer_protocol_negotiation) | |
1048 | || !WPACKET_start_sub_packet_u16(pkt) | |
1049 | || !WPACKET_start_sub_packet_u16(pkt) | |
1050 | || !WPACKET_sub_memcpy_u8(pkt, s->s3->alpn_selected, | |
1051 | s->s3->alpn_selected_len) | |
1052 | || !WPACKET_close(pkt) | |
1053 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 1054 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_ALPN, ERR_R_INTERNAL_ERROR); |
b186a592 | 1055 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1056 | } |
1057 | ||
b186a592 | 1058 | return EXT_RETURN_SENT; |
7da160b0 MC |
1059 | } |
1060 | ||
1061 | #ifndef OPENSSL_NO_SRTP | |
b186a592 MC |
1062 | EXT_RETURN tls_construct_stoc_use_srtp(SSL *s, WPACKET *pkt, |
1063 | unsigned int context, X509 *x, | |
1064 | size_t chainidx, int *al) | |
7da160b0 MC |
1065 | { |
1066 | if (s->srtp_profile == NULL) | |
b186a592 | 1067 | return EXT_RETURN_NOT_SENT; |
a1448c26 | 1068 | |
7da160b0 MC |
1069 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp) |
1070 | || !WPACKET_start_sub_packet_u16(pkt) | |
1071 | || !WPACKET_put_bytes_u16(pkt, 2) | |
1072 | || !WPACKET_put_bytes_u16(pkt, s->srtp_profile->id) | |
1073 | || !WPACKET_put_bytes_u8(pkt, 0) | |
1074 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 1075 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_USE_SRTP, ERR_R_INTERNAL_ERROR); |
b186a592 | 1076 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1077 | } |
1078 | ||
b186a592 | 1079 | return EXT_RETURN_SENT; |
7da160b0 MC |
1080 | } |
1081 | #endif | |
1082 | ||
b186a592 MC |
1083 | EXT_RETURN tls_construct_stoc_etm(SSL *s, WPACKET *pkt, unsigned int context, |
1084 | X509 *x, size_t chainidx, int *al) | |
7da160b0 | 1085 | { |
28a31a0a | 1086 | if (!s->ext.use_etm) |
b186a592 | 1087 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1088 | |
1089 | /* | |
1090 | * Don't use encrypt_then_mac if AEAD or RC4 might want to disable | |
1091 | * for other cases too. | |
1092 | */ | |
1093 | if (s->s3->tmp.new_cipher->algorithm_mac == SSL_AEAD | |
1094 | || s->s3->tmp.new_cipher->algorithm_enc == SSL_RC4 | |
1095 | || s->s3->tmp.new_cipher->algorithm_enc == SSL_eGOST2814789CNT | |
1096 | || s->s3->tmp.new_cipher->algorithm_enc == SSL_eGOST2814789CNT12) { | |
28a31a0a | 1097 | s->ext.use_etm = 0; |
b186a592 | 1098 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1099 | } |
1100 | ||
1101 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac) | |
1102 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 1103 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_ETM, ERR_R_INTERNAL_ERROR); |
b186a592 | 1104 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1105 | } |
1106 | ||
b186a592 | 1107 | return EXT_RETURN_SENT; |
7da160b0 MC |
1108 | } |
1109 | ||
b186a592 MC |
1110 | EXT_RETURN tls_construct_stoc_ems(SSL *s, WPACKET *pkt, unsigned int context, |
1111 | X509 *x, size_t chainidx, int *al) | |
7da160b0 MC |
1112 | { |
1113 | if ((s->s3->flags & TLS1_FLAGS_RECEIVED_EXTMS) == 0) | |
b186a592 | 1114 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1115 | |
1116 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret) | |
1117 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 1118 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_EMS, ERR_R_INTERNAL_ERROR); |
b186a592 | 1119 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1120 | } |
1121 | ||
b186a592 | 1122 | return EXT_RETURN_SENT; |
7da160b0 MC |
1123 | } |
1124 | ||
b186a592 MC |
1125 | EXT_RETURN tls_construct_stoc_key_share(SSL *s, WPACKET *pkt, |
1126 | unsigned int context, X509 *x, | |
1127 | size_t chainidx, int *al) | |
7da160b0 | 1128 | { |
3cf96e88 | 1129 | #ifndef OPENSSL_NO_TLS1_3 |
7da160b0 MC |
1130 | unsigned char *encodedPoint; |
1131 | size_t encoded_pt_len = 0; | |
1132 | EVP_PKEY *ckey = s->s3->peer_tmp, *skey = NULL; | |
1133 | ||
7da160b0 | 1134 | if (ckey == NULL) { |
7d061fce MC |
1135 | /* No key_share received from client */ |
1136 | if (s->hello_retry_request) { | |
7d061fce | 1137 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) |
aff9929b MC |
1138 | || !WPACKET_start_sub_packet_u16(pkt) |
1139 | || !WPACKET_put_bytes_u16(pkt, s->s3->group_id) | |
1140 | || !WPACKET_close(pkt)) { | |
7d061fce MC |
1141 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, |
1142 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1143 | return EXT_RETURN_FAIL; |
7d061fce MC |
1144 | } |
1145 | ||
b186a592 | 1146 | return EXT_RETURN_SENT; |
7d061fce MC |
1147 | } |
1148 | ||
1149 | /* Must be resuming. */ | |
0247086d MC |
1150 | if (!s->hit || !tls13_generate_handshake_secret(s, NULL, 0)) { |
1151 | *al = SSL_AD_INTERNAL_ERROR; | |
1152 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1153 | return EXT_RETURN_FAIL; |
0247086d | 1154 | } |
b186a592 | 1155 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1156 | } |
1157 | ||
1158 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
1159 | || !WPACKET_start_sub_packet_u16(pkt) | |
1160 | || !WPACKET_put_bytes_u16(pkt, s->s3->group_id)) { | |
7fe97c07 | 1161 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
b186a592 | 1162 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1163 | } |
1164 | ||
1165 | skey = ssl_generate_pkey(ckey); | |
1166 | if (skey == NULL) { | |
7fe97c07 | 1167 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_MALLOC_FAILURE); |
b186a592 | 1168 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1169 | } |
1170 | ||
1171 | /* Generate encoding of server key */ | |
1172 | encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(skey, &encodedPoint); | |
1173 | if (encoded_pt_len == 0) { | |
7fe97c07 | 1174 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_EC_LIB); |
7da160b0 | 1175 | EVP_PKEY_free(skey); |
b186a592 | 1176 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1177 | } |
1178 | ||
1179 | if (!WPACKET_sub_memcpy_u16(pkt, encodedPoint, encoded_pt_len) | |
1180 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 1181 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
7da160b0 MC |
1182 | EVP_PKEY_free(skey); |
1183 | OPENSSL_free(encodedPoint); | |
b186a592 | 1184 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1185 | } |
1186 | OPENSSL_free(encodedPoint); | |
1187 | ||
1188 | /* This causes the crypto state to be updated based on the derived keys */ | |
1189 | s->s3->tmp.pkey = skey; | |
1190 | if (ssl_derive(s, skey, ckey, 1) == 0) { | |
7fe97c07 | 1191 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
b186a592 | 1192 | return EXT_RETURN_FAIL; |
7da160b0 | 1193 | } |
3cf96e88 | 1194 | #endif |
7da160b0 | 1195 | |
b186a592 | 1196 | return EXT_RETURN_SENT; |
7da160b0 MC |
1197 | } |
1198 | ||
b186a592 MC |
1199 | EXT_RETURN tls_construct_stoc_cryptopro_bug(SSL *s, WPACKET *pkt, |
1200 | unsigned int context, X509 *x, | |
1201 | size_t chainidx, int *al) | |
7da160b0 MC |
1202 | { |
1203 | const unsigned char cryptopro_ext[36] = { | |
1204 | 0xfd, 0xe8, /* 65000 */ | |
1205 | 0x00, 0x20, /* 32 bytes length */ | |
1206 | 0x30, 0x1e, 0x30, 0x08, 0x06, 0x06, 0x2a, 0x85, | |
1207 | 0x03, 0x02, 0x02, 0x09, 0x30, 0x08, 0x06, 0x06, | |
1208 | 0x2a, 0x85, 0x03, 0x02, 0x02, 0x16, 0x30, 0x08, | |
1209 | 0x06, 0x06, 0x2a, 0x85, 0x03, 0x02, 0x02, 0x17 | |
1210 | }; | |
1211 | ||
1212 | if (((s->s3->tmp.new_cipher->id & 0xFFFF) != 0x80 | |
1213 | && (s->s3->tmp.new_cipher->id & 0xFFFF) != 0x81) | |
1214 | || (SSL_get_options(s) & SSL_OP_CRYPTOPRO_TLSEXT_BUG) == 0) | |
b186a592 | 1215 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1216 | |
1217 | if (!WPACKET_memcpy(pkt, cryptopro_ext, sizeof(cryptopro_ext))) { | |
7fe97c07 | 1218 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_CRYPTOPRO_BUG, ERR_R_INTERNAL_ERROR); |
b186a592 | 1219 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1220 | } |
1221 | ||
b186a592 | 1222 | return EXT_RETURN_SENT; |
7da160b0 | 1223 | } |
0247086d | 1224 | |
b186a592 MC |
1225 | EXT_RETURN tls_construct_stoc_early_data(SSL *s, WPACKET *pkt, |
1226 | unsigned int context, X509 *x, | |
1227 | size_t chainidx, int *al) | |
38df5a45 | 1228 | { |
fe874d27 | 1229 | if (context == SSL_EXT_TLS1_3_NEW_SESSION_TICKET) { |
6594189f | 1230 | if (s->max_early_data == 0) |
b186a592 | 1231 | return EXT_RETURN_NOT_SENT; |
6594189f MC |
1232 | |
1233 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) | |
1234 | || !WPACKET_start_sub_packet_u16(pkt) | |
1235 | || !WPACKET_put_bytes_u32(pkt, s->max_early_data) | |
1236 | || !WPACKET_close(pkt)) { | |
1237 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_EARLY_DATA, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1238 | return EXT_RETURN_FAIL; |
6594189f MC |
1239 | } |
1240 | ||
b186a592 | 1241 | return EXT_RETURN_SENT; |
6594189f MC |
1242 | } |
1243 | ||
38df5a45 | 1244 | if (s->ext.early_data != SSL_EARLY_DATA_ACCEPTED) |
b186a592 | 1245 | return EXT_RETURN_NOT_SENT; |
38df5a45 MC |
1246 | |
1247 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) | |
1248 | || !WPACKET_start_sub_packet_u16(pkt) | |
1249 | || !WPACKET_close(pkt)) { | |
1250 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_EARLY_DATA, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1251 | return EXT_RETURN_FAIL; |
38df5a45 MC |
1252 | } |
1253 | ||
b186a592 | 1254 | return EXT_RETURN_SENT; |
38df5a45 MC |
1255 | } |
1256 | ||
b186a592 MC |
1257 | EXT_RETURN tls_construct_stoc_psk(SSL *s, WPACKET *pkt, unsigned int context, |
1258 | X509 *x, size_t chainidx, int *al) | |
0247086d MC |
1259 | { |
1260 | if (!s->hit) | |
b186a592 | 1261 | return EXT_RETURN_NOT_SENT; |
0247086d MC |
1262 | |
1263 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk) | |
1264 | || !WPACKET_start_sub_packet_u16(pkt) | |
1265 | || !WPACKET_put_bytes_u16(pkt, s->session->ext.tick_identity) | |
1266 | || !WPACKET_close(pkt)) { | |
1267 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_PSK, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1268 | return EXT_RETURN_FAIL; |
0247086d MC |
1269 | } |
1270 | ||
b186a592 | 1271 | return EXT_RETURN_SENT; |
0247086d | 1272 | } |