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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 | /* | |
44e69951 F |
90 | * Although the intent was for server_name to be extensible, RFC 4366 |
91 | * was not clear about it; and so OpenSSL among other implementations, | |
92 | * always and only allows a 'host_name' name types. | |
25670f3e MC |
93 | * RFC 6066 corrected the mistake but adding new name types |
94 | * is nevertheless no longer feasible, so act as if no other | |
95 | * SNI types can exist, to simplify parsing. | |
96 | * | |
97 | * Also note that the RFC permits only one SNI value per type, | |
98 | * i.e., we can only have a single hostname. | |
99 | */ | |
100 | if (!PACKET_get_1(&sni, &servname_type) | |
101 | || servname_type != TLSEXT_NAMETYPE_host_name | |
102 | || !PACKET_as_length_prefixed_2(&sni, &hostname)) { | |
103 | *al = SSL_AD_DECODE_ERROR; | |
104 | return 0; | |
105 | } | |
106 | ||
107 | if (!s->hit) { | |
108 | if (PACKET_remaining(&hostname) > TLSEXT_MAXLEN_host_name) { | |
109 | *al = TLS1_AD_UNRECOGNIZED_NAME; | |
110 | return 0; | |
111 | } | |
112 | ||
113 | if (PACKET_contains_zero_byte(&hostname)) { | |
114 | *al = TLS1_AD_UNRECOGNIZED_NAME; | |
115 | return 0; | |
116 | } | |
117 | ||
7d061fce MC |
118 | OPENSSL_free(s->session->ext.hostname); |
119 | s->session->ext.hostname = NULL; | |
aff8c126 | 120 | if (!PACKET_strndup(&hostname, &s->session->ext.hostname)) { |
25670f3e MC |
121 | *al = TLS1_AD_INTERNAL_ERROR; |
122 | return 0; | |
123 | } | |
124 | ||
125 | s->servername_done = 1; | |
126 | } else { | |
127 | /* | |
128 | * TODO(openssl-team): if the SNI doesn't match, we MUST | |
129 | * fall back to a full handshake. | |
130 | */ | |
aff8c126 RS |
131 | s->servername_done = s->session->ext.hostname |
132 | && PACKET_equal(&hostname, s->session->ext.hostname, | |
133 | strlen(s->session->ext.hostname)); | |
630369d9 MC |
134 | |
135 | if (!s->servername_done && s->session->ext.hostname != NULL) | |
136 | s->ext.early_data_ok = 0; | |
25670f3e MC |
137 | } |
138 | ||
139 | return 1; | |
140 | } | |
141 | ||
142 | #ifndef OPENSSL_NO_SRP | |
61138358 MC |
143 | int tls_parse_ctos_srp(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
144 | size_t chainidx, int *al) | |
25670f3e MC |
145 | { |
146 | PACKET srp_I; | |
147 | ||
148 | if (!PACKET_as_length_prefixed_1(pkt, &srp_I) | |
149 | || PACKET_contains_zero_byte(&srp_I)) { | |
150 | *al = SSL_AD_DECODE_ERROR; | |
151 | return 0; | |
152 | } | |
153 | ||
154 | /* | |
155 | * TODO(openssl-team): currently, we re-authenticate the user | |
156 | * upon resumption. Instead, we MUST ignore the login. | |
157 | */ | |
158 | if (!PACKET_strndup(&srp_I, &s->srp_ctx.login)) { | |
fb34a0f4 | 159 | *al = SSL_AD_INTERNAL_ERROR; |
25670f3e MC |
160 | return 0; |
161 | } | |
162 | ||
163 | return 1; | |
164 | } | |
165 | #endif | |
166 | ||
167 | #ifndef OPENSSL_NO_EC | |
61138358 MC |
168 | int tls_parse_ctos_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context, |
169 | X509 *x, size_t chainidx, int *al) | |
25670f3e MC |
170 | { |
171 | PACKET ec_point_format_list; | |
172 | ||
173 | if (!PACKET_as_length_prefixed_1(pkt, &ec_point_format_list) | |
174 | || PACKET_remaining(&ec_point_format_list) == 0) { | |
175 | *al = SSL_AD_DECODE_ERROR; | |
176 | return 0; | |
177 | } | |
178 | ||
179 | if (!s->hit) { | |
180 | if (!PACKET_memdup(&ec_point_format_list, | |
aff8c126 RS |
181 | &s->session->ext.ecpointformats, |
182 | &s->session->ext.ecpointformats_len)) { | |
fb34a0f4 | 183 | *al = SSL_AD_INTERNAL_ERROR; |
25670f3e MC |
184 | return 0; |
185 | } | |
186 | } | |
187 | ||
188 | return 1; | |
189 | } | |
190 | #endif /* OPENSSL_NO_EC */ | |
191 | ||
61138358 MC |
192 | int tls_parse_ctos_session_ticket(SSL *s, PACKET *pkt, unsigned int context, |
193 | X509 *x, size_t chainidx, int *al) | |
25670f3e | 194 | { |
aff8c126 RS |
195 | if (s->ext.session_ticket_cb && |
196 | !s->ext.session_ticket_cb(s, PACKET_data(pkt), | |
197 | PACKET_remaining(pkt), | |
198 | s->ext.session_ticket_cb_arg)) { | |
fb34a0f4 | 199 | *al = SSL_AD_INTERNAL_ERROR; |
25670f3e MC |
200 | return 0; |
201 | } | |
202 | ||
203 | return 1; | |
204 | } | |
205 | ||
61138358 MC |
206 | int tls_parse_ctos_sig_algs(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
207 | size_t chainidx, int *al) | |
25670f3e MC |
208 | { |
209 | PACKET supported_sig_algs; | |
210 | ||
211 | if (!PACKET_as_length_prefixed_2(pkt, &supported_sig_algs) | |
25670f3e MC |
212 | || PACKET_remaining(&supported_sig_algs) == 0) { |
213 | *al = SSL_AD_DECODE_ERROR; | |
214 | return 0; | |
215 | } | |
216 | ||
703bcee0 | 217 | if (!s->hit && !tls1_save_sigalgs(s, &supported_sig_algs)) { |
fb34a0f4 | 218 | *al = SSL_AD_DECODE_ERROR; |
25670f3e MC |
219 | return 0; |
220 | } | |
221 | ||
222 | return 1; | |
223 | } | |
224 | ||
ab83e314 | 225 | #ifndef OPENSSL_NO_OCSP |
61138358 MC |
226 | int tls_parse_ctos_status_request(SSL *s, PACKET *pkt, unsigned int context, |
227 | X509 *x, size_t chainidx, int *al) | |
25670f3e | 228 | { |
1266eefd MC |
229 | PACKET responder_id_list, exts; |
230 | ||
e96e0f8e MC |
231 | /* Not defined if we get one of these in a client Certificate */ |
232 | if (x != NULL) | |
233 | return 1; | |
234 | ||
aff8c126 | 235 | if (!PACKET_get_1(pkt, (unsigned int *)&s->ext.status_type)) { |
25670f3e MC |
236 | *al = SSL_AD_DECODE_ERROR; |
237 | return 0; | |
238 | } | |
ab83e314 | 239 | |
aff8c126 | 240 | if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) { |
25670f3e | 241 | /* |
1266eefd | 242 | * We don't know what to do with any other type so ignore it. |
25670f3e | 243 | */ |
aff8c126 | 244 | s->ext.status_type = TLSEXT_STATUSTYPE_nothing; |
1266eefd MC |
245 | return 1; |
246 | } | |
25670f3e | 247 | |
1266eefd MC |
248 | if (!PACKET_get_length_prefixed_2 (pkt, &responder_id_list)) { |
249 | *al = SSL_AD_DECODE_ERROR; | |
250 | return 0; | |
251 | } | |
25670f3e | 252 | |
1266eefd MC |
253 | /* |
254 | * We remove any OCSP_RESPIDs from a previous handshake | |
255 | * to prevent unbounded memory growth - CVE-2016-6304 | |
256 | */ | |
aff8c126 | 257 | sk_OCSP_RESPID_pop_free(s->ext.ocsp.ids, OCSP_RESPID_free); |
1266eefd | 258 | if (PACKET_remaining(&responder_id_list) > 0) { |
aff8c126 RS |
259 | s->ext.ocsp.ids = sk_OCSP_RESPID_new_null(); |
260 | if (s->ext.ocsp.ids == NULL) { | |
1266eefd MC |
261 | *al = SSL_AD_INTERNAL_ERROR; |
262 | return 0; | |
263 | } | |
264 | } else { | |
aff8c126 | 265 | s->ext.ocsp.ids = NULL; |
1266eefd | 266 | } |
25670f3e | 267 | |
1266eefd MC |
268 | while (PACKET_remaining(&responder_id_list) > 0) { |
269 | OCSP_RESPID *id; | |
270 | PACKET responder_id; | |
271 | const unsigned char *id_data; | |
25670f3e | 272 | |
1266eefd MC |
273 | if (!PACKET_get_length_prefixed_2(&responder_id_list, &responder_id) |
274 | || PACKET_remaining(&responder_id) == 0) { | |
275 | *al = SSL_AD_DECODE_ERROR; | |
276 | return 0; | |
277 | } | |
25670f3e | 278 | |
1266eefd MC |
279 | id_data = PACKET_data(&responder_id); |
280 | /* TODO(size_t): Convert d2i_* to size_t */ | |
281 | id = d2i_OCSP_RESPID(NULL, &id_data, | |
282 | (int)PACKET_remaining(&responder_id)); | |
283 | if (id == NULL) { | |
284 | *al = SSL_AD_DECODE_ERROR; | |
285 | return 0; | |
25670f3e MC |
286 | } |
287 | ||
1266eefd MC |
288 | if (id_data != PACKET_end(&responder_id)) { |
289 | OCSP_RESPID_free(id); | |
25670f3e MC |
290 | *al = SSL_AD_DECODE_ERROR; |
291 | return 0; | |
292 | } | |
293 | ||
aff8c126 | 294 | if (!sk_OCSP_RESPID_push(s->ext.ocsp.ids, id)) { |
1266eefd MC |
295 | OCSP_RESPID_free(id); |
296 | *al = SSL_AD_INTERNAL_ERROR; | |
297 | return 0; | |
298 | } | |
299 | } | |
300 | ||
301 | /* Read in request_extensions */ | |
302 | if (!PACKET_as_length_prefixed_2(pkt, &exts)) { | |
303 | *al = SSL_AD_DECODE_ERROR; | |
304 | return 0; | |
305 | } | |
306 | ||
307 | if (PACKET_remaining(&exts) > 0) { | |
308 | const unsigned char *ext_data = PACKET_data(&exts); | |
309 | ||
aff8c126 | 310 | sk_X509_EXTENSION_pop_free(s->ext.ocsp.exts, |
1266eefd | 311 | X509_EXTENSION_free); |
aff8c126 | 312 | s->ext.ocsp.exts = |
1266eefd | 313 | d2i_X509_EXTENSIONS(NULL, &ext_data, (int)PACKET_remaining(&exts)); |
aff8c126 | 314 | if (s->ext.ocsp.exts == NULL || ext_data != PACKET_end(&exts)) { |
1266eefd MC |
315 | *al = SSL_AD_DECODE_ERROR; |
316 | return 0; | |
25670f3e | 317 | } |
25670f3e MC |
318 | } |
319 | ||
320 | return 1; | |
321 | } | |
ab83e314 | 322 | #endif |
25670f3e MC |
323 | |
324 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
61138358 MC |
325 | int tls_parse_ctos_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
326 | size_t chainidx, int *al) | |
25670f3e | 327 | { |
1266eefd MC |
328 | /* |
329 | * We shouldn't accept this extension on a | |
330 | * renegotiation. | |
1266eefd | 331 | */ |
c7f47786 | 332 | if (SSL_IS_FIRST_HANDSHAKE(s)) |
aff8c126 | 333 | s->s3->npn_seen = 1; |
25670f3e MC |
334 | |
335 | return 1; | |
336 | } | |
337 | #endif | |
338 | ||
339 | /* | |
1266eefd MC |
340 | * Save the ALPN extension in a ClientHello.|pkt| holds the contents of the ALPN |
341 | * extension, not including type and length. |al| is a pointer to the alert | |
342 | * value to send in the event of a failure. Returns: 1 on success, 0 on error. | |
25670f3e | 343 | */ |
61138358 MC |
344 | int tls_parse_ctos_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
345 | size_t chainidx, int *al) | |
25670f3e MC |
346 | { |
347 | PACKET protocol_list, save_protocol_list, protocol; | |
348 | ||
c7f47786 | 349 | if (!SSL_IS_FIRST_HANDSHAKE(s)) |
25670f3e MC |
350 | return 1; |
351 | ||
352 | if (!PACKET_as_length_prefixed_2(pkt, &protocol_list) | |
353 | || PACKET_remaining(&protocol_list) < 2) { | |
354 | *al = SSL_AD_DECODE_ERROR; | |
355 | return 0; | |
356 | } | |
357 | ||
358 | save_protocol_list = protocol_list; | |
359 | do { | |
360 | /* Protocol names can't be empty. */ | |
361 | if (!PACKET_get_length_prefixed_1(&protocol_list, &protocol) | |
362 | || PACKET_remaining(&protocol) == 0) { | |
363 | *al = SSL_AD_DECODE_ERROR; | |
364 | return 0; | |
365 | } | |
366 | } while (PACKET_remaining(&protocol_list) != 0); | |
367 | ||
7d061fce MC |
368 | OPENSSL_free(s->s3->alpn_proposed); |
369 | s->s3->alpn_proposed = NULL; | |
370 | s->s3->alpn_proposed_len = 0; | |
25670f3e MC |
371 | if (!PACKET_memdup(&save_protocol_list, |
372 | &s->s3->alpn_proposed, &s->s3->alpn_proposed_len)) { | |
fb34a0f4 | 373 | *al = SSL_AD_INTERNAL_ERROR; |
25670f3e MC |
374 | return 0; |
375 | } | |
376 | ||
377 | return 1; | |
378 | } | |
379 | ||
380 | #ifndef OPENSSL_NO_SRTP | |
61138358 MC |
381 | int tls_parse_ctos_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
382 | size_t chainidx, int *al) | |
25670f3e | 383 | { |
25670f3e MC |
384 | STACK_OF(SRTP_PROTECTION_PROFILE) *srvr; |
385 | unsigned int ct, mki_len, id; | |
386 | int i, srtp_pref; | |
387 | PACKET subpkt; | |
388 | ||
389 | /* Ignore this if we have no SRTP profiles */ | |
390 | if (SSL_get_srtp_profiles(s) == NULL) | |
391 | return 1; | |
392 | ||
393 | /* Pull off the length of the cipher suite list and check it is even */ | |
1266eefd MC |
394 | if (!PACKET_get_net_2(pkt, &ct) || (ct & 1) != 0 |
395 | || !PACKET_get_sub_packet(pkt, &subpkt, ct)) { | |
7fe97c07 | 396 | SSLerr(SSL_F_TLS_PARSE_CTOS_USE_SRTP, |
25670f3e MC |
397 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
398 | *al = SSL_AD_DECODE_ERROR; | |
399 | return 0; | |
400 | } | |
401 | ||
402 | srvr = SSL_get_srtp_profiles(s); | |
403 | s->srtp_profile = NULL; | |
404 | /* Search all profiles for a match initially */ | |
405 | srtp_pref = sk_SRTP_PROTECTION_PROFILE_num(srvr); | |
406 | ||
407 | while (PACKET_remaining(&subpkt)) { | |
408 | if (!PACKET_get_net_2(&subpkt, &id)) { | |
7fe97c07 | 409 | SSLerr(SSL_F_TLS_PARSE_CTOS_USE_SRTP, |
25670f3e MC |
410 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
411 | *al = SSL_AD_DECODE_ERROR; | |
412 | return 0; | |
413 | } | |
414 | ||
415 | /* | |
416 | * Only look for match in profiles of higher preference than | |
417 | * current match. | |
418 | * If no profiles have been have been configured then this | |
419 | * does nothing. | |
420 | */ | |
421 | for (i = 0; i < srtp_pref; i++) { | |
d270de32 | 422 | SRTP_PROTECTION_PROFILE *sprof = |
1266eefd MC |
423 | sk_SRTP_PROTECTION_PROFILE_value(srvr, i); |
424 | ||
25670f3e MC |
425 | if (sprof->id == id) { |
426 | s->srtp_profile = sprof; | |
427 | srtp_pref = i; | |
428 | break; | |
429 | } | |
430 | } | |
431 | } | |
432 | ||
1266eefd | 433 | /* Now extract the MKI value as a sanity check, but discard it for now */ |
25670f3e | 434 | if (!PACKET_get_1(pkt, &mki_len)) { |
7fe97c07 | 435 | SSLerr(SSL_F_TLS_PARSE_CTOS_USE_SRTP, |
25670f3e MC |
436 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
437 | *al = SSL_AD_DECODE_ERROR; | |
438 | return 0; | |
439 | } | |
440 | ||
441 | if (!PACKET_forward(pkt, mki_len) | |
442 | || PACKET_remaining(pkt)) { | |
7fe97c07 | 443 | SSLerr(SSL_F_TLS_PARSE_CTOS_USE_SRTP, SSL_R_BAD_SRTP_MKI_VALUE); |
25670f3e MC |
444 | *al = SSL_AD_DECODE_ERROR; |
445 | return 0; | |
446 | } | |
447 | ||
448 | return 1; | |
449 | } | |
450 | #endif | |
451 | ||
61138358 MC |
452 | int tls_parse_ctos_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
453 | size_t chainidx, int *al) | |
25670f3e MC |
454 | { |
455 | if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC)) | |
28a31a0a | 456 | s->ext.use_etm = 1; |
25670f3e MC |
457 | |
458 | return 1; | |
459 | } | |
460 | ||
b2f7e8c0 MC |
461 | /* |
462 | * Process a psk_kex_modes extension received in the ClientHello. |pkt| contains | |
463 | * the raw PACKET data for the extension. Returns 1 on success or 0 on failure. | |
464 | * If a failure occurs then |*al| is set to an appropriate alert value. | |
465 | */ | |
61138358 MC |
466 | int tls_parse_ctos_psk_kex_modes(SSL *s, PACKET *pkt, unsigned int context, |
467 | X509 *x, size_t chainidx, int *al) | |
b2f7e8c0 MC |
468 | { |
469 | #ifndef OPENSSL_NO_TLS1_3 | |
470 | PACKET psk_kex_modes; | |
471 | unsigned int mode; | |
472 | ||
473 | if (!PACKET_as_length_prefixed_1(pkt, &psk_kex_modes) | |
474 | || PACKET_remaining(&psk_kex_modes) == 0) { | |
475 | *al = SSL_AD_DECODE_ERROR; | |
476 | return 0; | |
477 | } | |
478 | ||
479 | while (PACKET_get_1(&psk_kex_modes, &mode)) { | |
480 | if (mode == TLSEXT_KEX_MODE_KE_DHE) | |
481 | s->ext.psk_kex_mode |= TLSEXT_KEX_MODE_FLAG_KE_DHE; | |
e3c0d76b MC |
482 | else if (mode == TLSEXT_KEX_MODE_KE |
483 | && (s->options & SSL_OP_ALLOW_NO_DHE_KEX) != 0) | |
b2f7e8c0 MC |
484 | s->ext.psk_kex_mode |= TLSEXT_KEX_MODE_FLAG_KE; |
485 | } | |
486 | #endif | |
487 | ||
488 | return 1; | |
489 | } | |
490 | ||
25670f3e MC |
491 | /* |
492 | * Process a key_share extension received in the ClientHello. |pkt| contains | |
493 | * the raw PACKET data for the extension. Returns 1 on success or 0 on failure. | |
494 | * If a failure occurs then |*al| is set to an appropriate alert value. | |
495 | */ | |
61138358 MC |
496 | int tls_parse_ctos_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
497 | size_t chainidx, int *al) | |
25670f3e | 498 | { |
3cf96e88 | 499 | #ifndef OPENSSL_NO_TLS1_3 |
25670f3e MC |
500 | unsigned int group_id; |
501 | PACKET key_share_list, encoded_pt; | |
9e84a42d | 502 | const uint16_t *clntcurves, *srvrcurves; |
25670f3e MC |
503 | size_t clnt_num_curves, srvr_num_curves; |
504 | int group_nid, found = 0; | |
505 | unsigned int curve_flags; | |
506 | ||
f4bbb37c | 507 | if (s->hit && (s->ext.psk_kex_mode & TLSEXT_KEX_MODE_FLAG_KE_DHE) == 0) |
25670f3e MC |
508 | return 1; |
509 | ||
510 | /* Sanity check */ | |
511 | if (s->s3->peer_tmp != NULL) { | |
512 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 513 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
514 | return 0; |
515 | } | |
516 | ||
517 | if (!PACKET_as_length_prefixed_2(pkt, &key_share_list)) { | |
721586ea | 518 | *al = SSL_AD_DECODE_ERROR; |
7fe97c07 | 519 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, SSL_R_LENGTH_MISMATCH); |
25670f3e MC |
520 | return 0; |
521 | } | |
522 | ||
523 | /* Get our list of supported curves */ | |
524 | if (!tls1_get_curvelist(s, 0, &srvrcurves, &srvr_num_curves)) { | |
525 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 526 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
527 | return 0; |
528 | } | |
529 | ||
b6fdc12d | 530 | /* Get the clients list of supported curves. */ |
25670f3e MC |
531 | if (!tls1_get_curvelist(s, 1, &clntcurves, &clnt_num_curves)) { |
532 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 533 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
534 | return 0; |
535 | } | |
b6fdc12d MC |
536 | if (clnt_num_curves == 0) { |
537 | /* | |
538 | * This can only happen if the supported_groups extension was not sent, | |
539 | * because we verify that the length is non-zero when we process that | |
540 | * extension. | |
541 | */ | |
542 | *al = SSL_AD_MISSING_EXTENSION; | |
543 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, | |
544 | SSL_R_MISSING_SUPPORTED_GROUPS_EXTENSION); | |
545 | return 0; | |
546 | } | |
25670f3e MC |
547 | |
548 | while (PACKET_remaining(&key_share_list) > 0) { | |
549 | if (!PACKET_get_net_2(&key_share_list, &group_id) | |
550 | || !PACKET_get_length_prefixed_2(&key_share_list, &encoded_pt) | |
551 | || PACKET_remaining(&encoded_pt) == 0) { | |
721586ea | 552 | *al = SSL_AD_DECODE_ERROR; |
7fe97c07 | 553 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, |
25670f3e MC |
554 | SSL_R_LENGTH_MISMATCH); |
555 | return 0; | |
556 | } | |
557 | ||
558 | /* | |
559 | * If we already found a suitable key_share we loop through the | |
560 | * rest to verify the structure, but don't process them. | |
561 | */ | |
562 | if (found) | |
563 | continue; | |
564 | ||
565 | /* Check if this share is in supported_groups sent from client */ | |
566 | if (!check_in_list(s, group_id, clntcurves, clnt_num_curves, 0)) { | |
721586ea | 567 | *al = SSL_AD_ILLEGAL_PARAMETER; |
7fe97c07 | 568 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, SSL_R_BAD_KEY_SHARE); |
25670f3e MC |
569 | return 0; |
570 | } | |
571 | ||
572 | /* Check if this share is for a group we can use */ | |
573 | if (!check_in_list(s, group_id, srvrcurves, srvr_num_curves, 1)) { | |
574 | /* Share not suitable */ | |
575 | continue; | |
576 | } | |
577 | ||
578 | group_nid = tls1_ec_curve_id2nid(group_id, &curve_flags); | |
579 | ||
580 | if (group_nid == 0) { | |
581 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 582 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, |
25670f3e MC |
583 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
584 | return 0; | |
585 | } | |
586 | ||
587 | if ((curve_flags & TLS_CURVE_TYPE) == TLS_CURVE_CUSTOM) { | |
588 | /* Can happen for some curves, e.g. X25519 */ | |
589 | EVP_PKEY *key = EVP_PKEY_new(); | |
590 | ||
591 | if (key == NULL || !EVP_PKEY_set_type(key, group_nid)) { | |
592 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 593 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, ERR_R_EVP_LIB); |
25670f3e MC |
594 | EVP_PKEY_free(key); |
595 | return 0; | |
596 | } | |
597 | s->s3->peer_tmp = key; | |
598 | } else { | |
599 | /* Set up EVP_PKEY with named curve as parameters */ | |
600 | EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL); | |
1266eefd | 601 | |
25670f3e MC |
602 | if (pctx == NULL |
603 | || EVP_PKEY_paramgen_init(pctx) <= 0 | |
604 | || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, | |
605 | group_nid) <= 0 | |
606 | || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) { | |
607 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 608 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, ERR_R_EVP_LIB); |
25670f3e MC |
609 | EVP_PKEY_CTX_free(pctx); |
610 | return 0; | |
611 | } | |
612 | EVP_PKEY_CTX_free(pctx); | |
613 | pctx = NULL; | |
614 | } | |
615 | s->s3->group_id = group_id; | |
616 | ||
617 | if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp, | |
618 | PACKET_data(&encoded_pt), | |
619 | PACKET_remaining(&encoded_pt))) { | |
fb34a0f4 | 620 | *al = SSL_AD_ILLEGAL_PARAMETER; |
7fe97c07 | 621 | SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, SSL_R_BAD_ECPOINT); |
25670f3e MC |
622 | return 0; |
623 | } | |
624 | ||
625 | found = 1; | |
626 | } | |
3cf96e88 | 627 | #endif |
25670f3e MC |
628 | |
629 | return 1; | |
630 | } | |
631 | ||
632 | #ifndef OPENSSL_NO_EC | |
61138358 MC |
633 | int tls_parse_ctos_supported_groups(SSL *s, PACKET *pkt, unsigned int context, |
634 | X509 *x, size_t chainidx, int *al) | |
25670f3e MC |
635 | { |
636 | PACKET supported_groups_list; | |
637 | ||
638 | /* Each group is 2 bytes and we must have at least 1. */ | |
639 | if (!PACKET_as_length_prefixed_2(pkt, &supported_groups_list) | |
640 | || PACKET_remaining(&supported_groups_list) == 0 | |
641 | || (PACKET_remaining(&supported_groups_list) % 2) != 0) { | |
642 | *al = SSL_AD_DECODE_ERROR; | |
643 | return 0; | |
644 | } | |
645 | ||
e3743355 BK |
646 | if (!s->hit || SSL_IS_TLS13(s)) { |
647 | OPENSSL_free(s->session->ext.supportedgroups); | |
648 | s->session->ext.supportedgroups = NULL; | |
649 | s->session->ext.supportedgroups_len = 0; | |
9e84a42d | 650 | if (!tls1_save_u16(&supported_groups_list, |
e3743355 BK |
651 | &s->session->ext.supportedgroups, |
652 | &s->session->ext.supportedgroups_len)) { | |
653 | *al = SSL_AD_INTERNAL_ERROR; | |
654 | return 0; | |
655 | } | |
25670f3e MC |
656 | } |
657 | ||
658 | return 1; | |
659 | } | |
660 | #endif | |
661 | ||
61138358 MC |
662 | int tls_parse_ctos_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
663 | size_t chainidx, int *al) | |
25670f3e MC |
664 | { |
665 | /* The extension must always be empty */ | |
666 | if (PACKET_remaining(pkt) != 0) { | |
667 | *al = SSL_AD_DECODE_ERROR; | |
668 | return 0; | |
669 | } | |
670 | ||
671 | s->s3->flags |= TLS1_FLAGS_RECEIVED_EXTMS; | |
672 | ||
673 | return 1; | |
674 | } | |
7da160b0 | 675 | |
38df5a45 MC |
676 | |
677 | int tls_parse_ctos_early_data(SSL *s, PACKET *pkt, unsigned int context, | |
678 | X509 *x, size_t chainidx, int *al) | |
679 | { | |
680 | if (PACKET_remaining(pkt) != 0) { | |
681 | *al = SSL_AD_DECODE_ERROR; | |
682 | return 0; | |
683 | } | |
684 | ||
d4504fe5 MC |
685 | if (s->hello_retry_request) { |
686 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
687 | return 0; | |
688 | } | |
689 | ||
38df5a45 MC |
690 | return 1; |
691 | } | |
692 | ||
61138358 MC |
693 | int tls_parse_ctos_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
694 | size_t chainidx, int *al) | |
1053a6e2 MC |
695 | { |
696 | PACKET identities, binders, binder; | |
697 | size_t binderoffset, hashsize; | |
698 | SSL_SESSION *sess = NULL; | |
3a7c56b2 | 699 | unsigned int id, i, ext = 0; |
1053a6e2 MC |
700 | const EVP_MD *md = NULL; |
701 | ||
1a9f457c MC |
702 | /* |
703 | * If we have no PSK kex mode that we recognise then we can't resume so | |
704 | * ignore this extension | |
705 | */ | |
706 | if ((s->ext.psk_kex_mode | |
707 | & (TLSEXT_KEX_MODE_FLAG_KE | TLSEXT_KEX_MODE_FLAG_KE_DHE)) == 0) | |
708 | return 1; | |
709 | ||
1053a6e2 MC |
710 | if (!PACKET_get_length_prefixed_2(pkt, &identities)) { |
711 | *al = SSL_AD_DECODE_ERROR; | |
712 | return 0; | |
713 | } | |
714 | ||
715 | for (id = 0; PACKET_remaining(&identities) != 0; id++) { | |
716 | PACKET identity; | |
2c604cb9 | 717 | unsigned long ticket_agel; |
1053a6e2 MC |
718 | |
719 | if (!PACKET_get_length_prefixed_2(&identities, &identity) | |
2c604cb9 | 720 | || !PACKET_get_net_4(&identities, &ticket_agel)) { |
1053a6e2 MC |
721 | *al = SSL_AD_DECODE_ERROR; |
722 | return 0; | |
723 | } | |
724 | ||
3a7c56b2 | 725 | if (s->psk_find_session_cb != NULL |
011d768a MC |
726 | && !s->psk_find_session_cb(s, PACKET_data(&identity), |
727 | PACKET_remaining(&identity), | |
728 | &sess)) { | |
729 | *al = SSL_AD_INTERNAL_ERROR; | |
730 | return 0; | |
731 | } | |
732 | ||
733 | if (sess != NULL) { | |
734 | /* We found a PSK */ | |
3a7c56b2 | 735 | SSL_SESSION *sesstmp = ssl_session_dup(sess, 0); |
1b8bacff | 736 | |
3a7c56b2 MC |
737 | if (sesstmp == NULL) { |
738 | *al = SSL_AD_INTERNAL_ERROR; | |
739 | return 0; | |
740 | } | |
741 | SSL_SESSION_free(sess); | |
742 | sess = sesstmp; | |
743 | ||
744 | /* | |
745 | * We've just been told to use this session for this context so | |
746 | * make sure the sid_ctx matches up. | |
747 | */ | |
748 | memcpy(sess->sid_ctx, s->sid_ctx, s->sid_ctx_length); | |
749 | sess->sid_ctx_length = s->sid_ctx_length; | |
750 | ext = 1; | |
630369d9 MC |
751 | if (id == 0) |
752 | s->ext.early_data_ok = 1; | |
3a7c56b2 MC |
753 | } else { |
754 | uint32_t ticket_age = 0, now, agesec, agems; | |
755 | int ret = tls_decrypt_ticket(s, PACKET_data(&identity), | |
756 | PACKET_remaining(&identity), NULL, 0, | |
757 | &sess); | |
758 | ||
759 | if (ret == TICKET_FATAL_ERR_MALLOC | |
760 | || ret == TICKET_FATAL_ERR_OTHER) { | |
761 | *al = SSL_AD_INTERNAL_ERROR; | |
762 | return 0; | |
763 | } | |
764 | if (ret == TICKET_NO_DECRYPT) | |
765 | continue; | |
766 | ||
767 | ticket_age = (uint32_t)ticket_agel; | |
768 | now = (uint32_t)time(NULL); | |
769 | agesec = now - (uint32_t)sess->time; | |
770 | agems = agesec * (uint32_t)1000; | |
771 | ticket_age -= sess->ext.tick_age_add; | |
772 | ||
773 | /* | |
774 | * For simplicity we do our age calculations in seconds. If the | |
775 | * client does it in ms then it could appear that their ticket age | |
776 | * is longer than ours (our ticket age calculation should always be | |
777 | * slightly longer than the client's due to the network latency). | |
778 | * Therefore we add 1000ms to our age calculation to adjust for | |
779 | * rounding errors. | |
780 | */ | |
630369d9 MC |
781 | if (id == 0 |
782 | && sess->timeout >= (long)agesec | |
3a7c56b2 MC |
783 | && agems / (uint32_t)1000 == agesec |
784 | && ticket_age <= agems + 1000 | |
785 | && ticket_age + TICKET_AGE_ALLOWANCE >= agems + 1000) { | |
786 | /* | |
787 | * Ticket age is within tolerance and not expired. We allow it | |
788 | * for early data | |
789 | */ | |
790 | s->ext.early_data_ok = 1; | |
791 | } | |
1053a6e2 | 792 | } |
1053a6e2 | 793 | |
534a43ff | 794 | md = ssl_md(sess->cipher->algorithm2); |
0de6d66d MC |
795 | if (md != ssl_md(s->s3->tmp.new_cipher->algorithm2)) { |
796 | /* The ciphersuite is not compatible with this session. */ | |
1053a6e2 MC |
797 | SSL_SESSION_free(sess); |
798 | sess = NULL; | |
630369d9 | 799 | s->ext.early_data_ok = 0; |
1053a6e2 MC |
800 | continue; |
801 | } | |
1053a6e2 MC |
802 | break; |
803 | } | |
804 | ||
805 | if (sess == NULL) | |
806 | return 1; | |
807 | ||
808 | binderoffset = PACKET_data(pkt) - (const unsigned char *)s->init_buf->data; | |
1053a6e2 MC |
809 | hashsize = EVP_MD_size(md); |
810 | ||
811 | if (!PACKET_get_length_prefixed_2(pkt, &binders)) { | |
812 | *al = SSL_AD_DECODE_ERROR; | |
813 | goto err; | |
814 | } | |
815 | ||
816 | for (i = 0; i <= id; i++) { | |
817 | if (!PACKET_get_length_prefixed_1(&binders, &binder)) { | |
818 | *al = SSL_AD_DECODE_ERROR; | |
819 | goto err; | |
820 | } | |
821 | } | |
822 | ||
823 | if (PACKET_remaining(&binder) != hashsize | |
824 | || tls_psk_do_binder(s, md, | |
825 | (const unsigned char *)s->init_buf->data, | |
826 | binderoffset, PACKET_data(&binder), NULL, | |
3a7c56b2 | 827 | sess, 0, ext) != 1) { |
1053a6e2 MC |
828 | *al = SSL_AD_DECODE_ERROR; |
829 | SSLerr(SSL_F_TLS_PARSE_CTOS_PSK, ERR_R_INTERNAL_ERROR); | |
830 | goto err; | |
831 | } | |
832 | ||
833 | sess->ext.tick_identity = id; | |
2c604cb9 | 834 | |
1053a6e2 MC |
835 | SSL_SESSION_free(s->session); |
836 | s->session = sess; | |
1053a6e2 MC |
837 | return 1; |
838 | err: | |
312e9387 | 839 | SSL_SESSION_free(sess); |
1053a6e2 MC |
840 | return 0; |
841 | } | |
842 | ||
1266eefd MC |
843 | /* |
844 | * Add the server's renegotiation binding | |
845 | */ | |
b186a592 MC |
846 | EXT_RETURN tls_construct_stoc_renegotiate(SSL *s, WPACKET *pkt, |
847 | unsigned int context, X509 *x, | |
848 | size_t chainidx, int *al) | |
7da160b0 MC |
849 | { |
850 | if (!s->s3->send_connection_binding) | |
b186a592 | 851 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 852 | |
db0f35dd | 853 | /* Still add this even if SSL_OP_NO_RENEGOTIATION is set */ |
7da160b0 MC |
854 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_renegotiate) |
855 | || !WPACKET_start_sub_packet_u16(pkt) | |
856 | || !WPACKET_start_sub_packet_u8(pkt) | |
857 | || !WPACKET_memcpy(pkt, s->s3->previous_client_finished, | |
858 | s->s3->previous_client_finished_len) | |
859 | || !WPACKET_memcpy(pkt, s->s3->previous_server_finished, | |
860 | s->s3->previous_server_finished_len) | |
861 | || !WPACKET_close(pkt) | |
862 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 863 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_RENEGOTIATE, ERR_R_INTERNAL_ERROR); |
b186a592 | 864 | return EXT_RETURN_FAIL; |
7da160b0 MC |
865 | } |
866 | ||
b186a592 | 867 | return EXT_RETURN_SENT; |
7da160b0 MC |
868 | } |
869 | ||
b186a592 MC |
870 | EXT_RETURN tls_construct_stoc_server_name(SSL *s, WPACKET *pkt, |
871 | unsigned int context, X509 *x, | |
872 | size_t chainidx, int *al) | |
7da160b0 MC |
873 | { |
874 | if (s->hit || s->servername_done != 1 | |
aff8c126 | 875 | || s->session->ext.hostname == NULL) |
b186a592 | 876 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
877 | |
878 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_server_name) | |
879 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 880 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_SERVER_NAME, ERR_R_INTERNAL_ERROR); |
b186a592 | 881 | return EXT_RETURN_FAIL; |
7da160b0 MC |
882 | } |
883 | ||
b186a592 | 884 | return EXT_RETURN_SENT; |
7da160b0 MC |
885 | } |
886 | ||
887 | #ifndef OPENSSL_NO_EC | |
b186a592 MC |
888 | EXT_RETURN tls_construct_stoc_ec_pt_formats(SSL *s, WPACKET *pkt, |
889 | unsigned int context, X509 *x, | |
890 | size_t chainidx, int *al) | |
7da160b0 MC |
891 | { |
892 | unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
893 | unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
89247375 | 894 | int using_ecc = ((alg_k & SSL_kECDHE) || (alg_a & SSL_aECDSA)) |
aff8c126 | 895 | && (s->session->ext.ecpointformats != NULL); |
7da160b0 MC |
896 | const unsigned char *plist; |
897 | size_t plistlen; | |
898 | ||
899 | if (!using_ecc) | |
b186a592 | 900 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
901 | |
902 | tls1_get_formatlist(s, &plist, &plistlen); | |
7da160b0 MC |
903 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_ec_point_formats) |
904 | || !WPACKET_start_sub_packet_u16(pkt) | |
905 | || !WPACKET_sub_memcpy_u8(pkt, plist, plistlen) | |
906 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 907 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR); |
b186a592 | 908 | return EXT_RETURN_FAIL; |
7da160b0 MC |
909 | } |
910 | ||
b186a592 | 911 | return EXT_RETURN_SENT; |
7da160b0 MC |
912 | } |
913 | #endif | |
914 | ||
cf53cbea | 915 | #ifndef OPENSSL_NO_EC |
b186a592 MC |
916 | EXT_RETURN tls_construct_stoc_supported_groups(SSL *s, WPACKET *pkt, |
917 | unsigned int context, X509 *x, | |
918 | size_t chainidx, int *al) | |
6af87546 | 919 | { |
9e84a42d | 920 | const uint16_t *groups; |
6af87546 MC |
921 | size_t numgroups, i, first = 1; |
922 | ||
923 | /* s->s3->group_id is non zero if we accepted a key_share */ | |
924 | if (s->s3->group_id == 0) | |
b186a592 | 925 | return EXT_RETURN_NOT_SENT; |
6af87546 MC |
926 | |
927 | /* Get our list of supported groups */ | |
928 | if (!tls1_get_curvelist(s, 0, &groups, &numgroups) || numgroups == 0) { | |
929 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS, ERR_R_INTERNAL_ERROR); | |
b186a592 | 930 | return EXT_RETURN_FAIL; |
6af87546 MC |
931 | } |
932 | ||
933 | /* Copy group ID if supported */ | |
9e84a42d DSH |
934 | for (i = 0; i < numgroups; i++) { |
935 | uint16_t group = groups[i]; | |
936 | ||
937 | if (tls_curve_allowed(s, group, SSL_SECOP_CURVE_SUPPORTED)) { | |
6af87546 MC |
938 | if (first) { |
939 | /* | |
940 | * Check if the client is already using our preferred group. If | |
941 | * so we don't need to add this extension | |
942 | */ | |
9e84a42d | 943 | if (s->s3->group_id == group) |
b186a592 | 944 | return EXT_RETURN_NOT_SENT; |
6af87546 MC |
945 | |
946 | /* Add extension header */ | |
947 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_groups) | |
948 | /* Sub-packet for supported_groups extension */ | |
949 | || !WPACKET_start_sub_packet_u16(pkt) | |
950 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
951 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS, | |
952 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 953 | return EXT_RETURN_FAIL; |
6af87546 MC |
954 | } |
955 | ||
956 | first = 0; | |
957 | } | |
9e84a42d | 958 | if (!WPACKET_put_bytes_u16(pkt, group)) { |
6af87546 MC |
959 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS, |
960 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 961 | return EXT_RETURN_FAIL; |
6af87546 MC |
962 | } |
963 | } | |
964 | } | |
965 | ||
966 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
967 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS, ERR_R_INTERNAL_ERROR); | |
b186a592 | 968 | return EXT_RETURN_FAIL; |
6af87546 MC |
969 | } |
970 | ||
b186a592 | 971 | return EXT_RETURN_SENT; |
6af87546 | 972 | } |
cf53cbea | 973 | #endif |
6af87546 | 974 | |
b186a592 MC |
975 | EXT_RETURN tls_construct_stoc_session_ticket(SSL *s, WPACKET *pkt, |
976 | unsigned int context, X509 *x, | |
977 | size_t chainidx, int *al) | |
7da160b0 | 978 | { |
aff8c126 RS |
979 | if (!s->ext.ticket_expected || !tls_use_ticket(s)) { |
980 | s->ext.ticket_expected = 0; | |
b186a592 | 981 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
982 | } |
983 | ||
984 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket) | |
985 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 986 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_SESSION_TICKET, ERR_R_INTERNAL_ERROR); |
b186a592 | 987 | return EXT_RETURN_FAIL; |
7da160b0 MC |
988 | } |
989 | ||
b186a592 | 990 | return EXT_RETURN_SENT; |
7da160b0 MC |
991 | } |
992 | ||
ab83e314 | 993 | #ifndef OPENSSL_NO_OCSP |
b186a592 MC |
994 | EXT_RETURN tls_construct_stoc_status_request(SSL *s, WPACKET *pkt, |
995 | unsigned int context, X509 *x, | |
996 | size_t chainidx, int *al) | |
7da160b0 | 997 | { |
aff8c126 | 998 | if (!s->ext.status_expected) |
b186a592 | 999 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 1000 | |
8521ced6 | 1001 | if (SSL_IS_TLS13(s) && chainidx != 0) |
b186a592 | 1002 | return EXT_RETURN_NOT_SENT; |
e96e0f8e | 1003 | |
7da160b0 | 1004 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request) |
f63e4288 MC |
1005 | || !WPACKET_start_sub_packet_u16(pkt)) { |
1006 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1007 | return EXT_RETURN_FAIL; |
f63e4288 MC |
1008 | } |
1009 | ||
1010 | /* | |
1011 | * In TLSv1.3 we include the certificate status itself. In <= TLSv1.2 we | |
1012 | * send back an empty extension, with the certificate status appearing as a | |
1013 | * separate message | |
1014 | */ | |
1015 | if ((SSL_IS_TLS13(s) && !tls_construct_cert_status_body(s, pkt)) | |
1016 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 1017 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); |
b186a592 | 1018 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1019 | } |
1020 | ||
b186a592 | 1021 | return EXT_RETURN_SENT; |
7da160b0 | 1022 | } |
ab83e314 | 1023 | #endif |
7da160b0 | 1024 | |
7da160b0 | 1025 | #ifndef OPENSSL_NO_NEXTPROTONEG |
b186a592 MC |
1026 | EXT_RETURN tls_construct_stoc_next_proto_neg(SSL *s, WPACKET *pkt, |
1027 | unsigned int context, X509 *x, | |
1028 | size_t chainidx, int *al) | |
7da160b0 MC |
1029 | { |
1030 | const unsigned char *npa; | |
1031 | unsigned int npalen; | |
1032 | int ret; | |
aff8c126 | 1033 | int npn_seen = s->s3->npn_seen; |
7da160b0 | 1034 | |
aff8c126 RS |
1035 | s->s3->npn_seen = 0; |
1036 | if (!npn_seen || s->ctx->ext.npn_advertised_cb == NULL) | |
b186a592 | 1037 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 1038 | |
aff8c126 RS |
1039 | ret = s->ctx->ext.npn_advertised_cb(s, &npa, &npalen, |
1040 | s->ctx->ext.npn_advertised_cb_arg); | |
7da160b0 MC |
1041 | if (ret == SSL_TLSEXT_ERR_OK) { |
1042 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_next_proto_neg) | |
1043 | || !WPACKET_sub_memcpy_u16(pkt, npa, npalen)) { | |
7fe97c07 | 1044 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_NEXT_PROTO_NEG, |
7da160b0 | 1045 | ERR_R_INTERNAL_ERROR); |
b186a592 | 1046 | return EXT_RETURN_FAIL; |
7da160b0 | 1047 | } |
aff8c126 | 1048 | s->s3->npn_seen = 1; |
7da160b0 MC |
1049 | } |
1050 | ||
b186a592 | 1051 | return EXT_RETURN_SENT; |
7da160b0 MC |
1052 | } |
1053 | #endif | |
1054 | ||
b186a592 MC |
1055 | EXT_RETURN tls_construct_stoc_alpn(SSL *s, WPACKET *pkt, unsigned int context, |
1056 | X509 *x, size_t chainidx, int *al) | |
7da160b0 MC |
1057 | { |
1058 | if (s->s3->alpn_selected == NULL) | |
b186a592 | 1059 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1060 | |
1061 | if (!WPACKET_put_bytes_u16(pkt, | |
1062 | TLSEXT_TYPE_application_layer_protocol_negotiation) | |
1063 | || !WPACKET_start_sub_packet_u16(pkt) | |
1064 | || !WPACKET_start_sub_packet_u16(pkt) | |
1065 | || !WPACKET_sub_memcpy_u8(pkt, s->s3->alpn_selected, | |
1066 | s->s3->alpn_selected_len) | |
1067 | || !WPACKET_close(pkt) | |
1068 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 1069 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_ALPN, ERR_R_INTERNAL_ERROR); |
b186a592 | 1070 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1071 | } |
1072 | ||
b186a592 | 1073 | return EXT_RETURN_SENT; |
7da160b0 MC |
1074 | } |
1075 | ||
1076 | #ifndef OPENSSL_NO_SRTP | |
b186a592 MC |
1077 | EXT_RETURN tls_construct_stoc_use_srtp(SSL *s, WPACKET *pkt, |
1078 | unsigned int context, X509 *x, | |
1079 | size_t chainidx, int *al) | |
7da160b0 MC |
1080 | { |
1081 | if (s->srtp_profile == NULL) | |
b186a592 | 1082 | return EXT_RETURN_NOT_SENT; |
a1448c26 | 1083 | |
7da160b0 MC |
1084 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp) |
1085 | || !WPACKET_start_sub_packet_u16(pkt) | |
1086 | || !WPACKET_put_bytes_u16(pkt, 2) | |
1087 | || !WPACKET_put_bytes_u16(pkt, s->srtp_profile->id) | |
1088 | || !WPACKET_put_bytes_u8(pkt, 0) | |
1089 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 1090 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_USE_SRTP, ERR_R_INTERNAL_ERROR); |
b186a592 | 1091 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1092 | } |
1093 | ||
b186a592 | 1094 | return EXT_RETURN_SENT; |
7da160b0 MC |
1095 | } |
1096 | #endif | |
1097 | ||
b186a592 MC |
1098 | EXT_RETURN tls_construct_stoc_etm(SSL *s, WPACKET *pkt, unsigned int context, |
1099 | X509 *x, size_t chainidx, int *al) | |
7da160b0 | 1100 | { |
28a31a0a | 1101 | if (!s->ext.use_etm) |
b186a592 | 1102 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1103 | |
1104 | /* | |
1105 | * Don't use encrypt_then_mac if AEAD or RC4 might want to disable | |
1106 | * for other cases too. | |
1107 | */ | |
1108 | if (s->s3->tmp.new_cipher->algorithm_mac == SSL_AEAD | |
1109 | || s->s3->tmp.new_cipher->algorithm_enc == SSL_RC4 | |
1110 | || s->s3->tmp.new_cipher->algorithm_enc == SSL_eGOST2814789CNT | |
1111 | || s->s3->tmp.new_cipher->algorithm_enc == SSL_eGOST2814789CNT12) { | |
28a31a0a | 1112 | s->ext.use_etm = 0; |
b186a592 | 1113 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1114 | } |
1115 | ||
1116 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac) | |
1117 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 1118 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_ETM, 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_ems(SSL *s, WPACKET *pkt, unsigned int context, |
1126 | X509 *x, size_t chainidx, int *al) | |
7da160b0 MC |
1127 | { |
1128 | if ((s->s3->flags & TLS1_FLAGS_RECEIVED_EXTMS) == 0) | |
b186a592 | 1129 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1130 | |
1131 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret) | |
1132 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 1133 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_EMS, ERR_R_INTERNAL_ERROR); |
b186a592 | 1134 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1135 | } |
1136 | ||
b186a592 | 1137 | return EXT_RETURN_SENT; |
7da160b0 MC |
1138 | } |
1139 | ||
b186a592 MC |
1140 | EXT_RETURN tls_construct_stoc_key_share(SSL *s, WPACKET *pkt, |
1141 | unsigned int context, X509 *x, | |
1142 | size_t chainidx, int *al) | |
7da160b0 | 1143 | { |
3cf96e88 | 1144 | #ifndef OPENSSL_NO_TLS1_3 |
7da160b0 MC |
1145 | unsigned char *encodedPoint; |
1146 | size_t encoded_pt_len = 0; | |
1147 | EVP_PKEY *ckey = s->s3->peer_tmp, *skey = NULL; | |
1148 | ||
7da160b0 | 1149 | if (ckey == NULL) { |
7d061fce MC |
1150 | /* No key_share received from client */ |
1151 | if (s->hello_retry_request) { | |
7d061fce | 1152 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) |
aff9929b MC |
1153 | || !WPACKET_start_sub_packet_u16(pkt) |
1154 | || !WPACKET_put_bytes_u16(pkt, s->s3->group_id) | |
1155 | || !WPACKET_close(pkt)) { | |
7d061fce MC |
1156 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, |
1157 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1158 | return EXT_RETURN_FAIL; |
7d061fce MC |
1159 | } |
1160 | ||
b186a592 | 1161 | return EXT_RETURN_SENT; |
7d061fce MC |
1162 | } |
1163 | ||
1164 | /* Must be resuming. */ | |
0247086d MC |
1165 | if (!s->hit || !tls13_generate_handshake_secret(s, NULL, 0)) { |
1166 | *al = SSL_AD_INTERNAL_ERROR; | |
1167 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1168 | return EXT_RETURN_FAIL; |
0247086d | 1169 | } |
b186a592 | 1170 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1171 | } |
1172 | ||
1173 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
1174 | || !WPACKET_start_sub_packet_u16(pkt) | |
1175 | || !WPACKET_put_bytes_u16(pkt, s->s3->group_id)) { | |
7fe97c07 | 1176 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
b186a592 | 1177 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1178 | } |
1179 | ||
1180 | skey = ssl_generate_pkey(ckey); | |
1181 | if (skey == NULL) { | |
7fe97c07 | 1182 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_MALLOC_FAILURE); |
b186a592 | 1183 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1184 | } |
1185 | ||
1186 | /* Generate encoding of server key */ | |
1187 | encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(skey, &encodedPoint); | |
1188 | if (encoded_pt_len == 0) { | |
7fe97c07 | 1189 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_EC_LIB); |
7da160b0 | 1190 | EVP_PKEY_free(skey); |
b186a592 | 1191 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1192 | } |
1193 | ||
1194 | if (!WPACKET_sub_memcpy_u16(pkt, encodedPoint, encoded_pt_len) | |
1195 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 1196 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
7da160b0 MC |
1197 | EVP_PKEY_free(skey); |
1198 | OPENSSL_free(encodedPoint); | |
b186a592 | 1199 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1200 | } |
1201 | OPENSSL_free(encodedPoint); | |
1202 | ||
1203 | /* This causes the crypto state to be updated based on the derived keys */ | |
1204 | s->s3->tmp.pkey = skey; | |
1205 | if (ssl_derive(s, skey, ckey, 1) == 0) { | |
7fe97c07 | 1206 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
b186a592 | 1207 | return EXT_RETURN_FAIL; |
7da160b0 | 1208 | } |
3cf96e88 | 1209 | #endif |
7da160b0 | 1210 | |
b186a592 | 1211 | return EXT_RETURN_SENT; |
7da160b0 MC |
1212 | } |
1213 | ||
b186a592 MC |
1214 | EXT_RETURN tls_construct_stoc_cryptopro_bug(SSL *s, WPACKET *pkt, |
1215 | unsigned int context, X509 *x, | |
1216 | size_t chainidx, int *al) | |
7da160b0 MC |
1217 | { |
1218 | const unsigned char cryptopro_ext[36] = { | |
1219 | 0xfd, 0xe8, /* 65000 */ | |
1220 | 0x00, 0x20, /* 32 bytes length */ | |
1221 | 0x30, 0x1e, 0x30, 0x08, 0x06, 0x06, 0x2a, 0x85, | |
1222 | 0x03, 0x02, 0x02, 0x09, 0x30, 0x08, 0x06, 0x06, | |
1223 | 0x2a, 0x85, 0x03, 0x02, 0x02, 0x16, 0x30, 0x08, | |
1224 | 0x06, 0x06, 0x2a, 0x85, 0x03, 0x02, 0x02, 0x17 | |
1225 | }; | |
1226 | ||
1227 | if (((s->s3->tmp.new_cipher->id & 0xFFFF) != 0x80 | |
1228 | && (s->s3->tmp.new_cipher->id & 0xFFFF) != 0x81) | |
1229 | || (SSL_get_options(s) & SSL_OP_CRYPTOPRO_TLSEXT_BUG) == 0) | |
b186a592 | 1230 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1231 | |
1232 | if (!WPACKET_memcpy(pkt, cryptopro_ext, sizeof(cryptopro_ext))) { | |
7fe97c07 | 1233 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_CRYPTOPRO_BUG, ERR_R_INTERNAL_ERROR); |
b186a592 | 1234 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1235 | } |
1236 | ||
b186a592 | 1237 | return EXT_RETURN_SENT; |
7da160b0 | 1238 | } |
0247086d | 1239 | |
b186a592 MC |
1240 | EXT_RETURN tls_construct_stoc_early_data(SSL *s, WPACKET *pkt, |
1241 | unsigned int context, X509 *x, | |
1242 | size_t chainidx, int *al) | |
38df5a45 | 1243 | { |
fe874d27 | 1244 | if (context == SSL_EXT_TLS1_3_NEW_SESSION_TICKET) { |
6594189f | 1245 | if (s->max_early_data == 0) |
b186a592 | 1246 | return EXT_RETURN_NOT_SENT; |
6594189f MC |
1247 | |
1248 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) | |
1249 | || !WPACKET_start_sub_packet_u16(pkt) | |
1250 | || !WPACKET_put_bytes_u32(pkt, s->max_early_data) | |
1251 | || !WPACKET_close(pkt)) { | |
1252 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_EARLY_DATA, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1253 | return EXT_RETURN_FAIL; |
6594189f MC |
1254 | } |
1255 | ||
b186a592 | 1256 | return EXT_RETURN_SENT; |
6594189f MC |
1257 | } |
1258 | ||
38df5a45 | 1259 | if (s->ext.early_data != SSL_EARLY_DATA_ACCEPTED) |
b186a592 | 1260 | return EXT_RETURN_NOT_SENT; |
38df5a45 MC |
1261 | |
1262 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) | |
1263 | || !WPACKET_start_sub_packet_u16(pkt) | |
1264 | || !WPACKET_close(pkt)) { | |
1265 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_EARLY_DATA, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1266 | return EXT_RETURN_FAIL; |
38df5a45 MC |
1267 | } |
1268 | ||
b186a592 | 1269 | return EXT_RETURN_SENT; |
38df5a45 MC |
1270 | } |
1271 | ||
b186a592 MC |
1272 | EXT_RETURN tls_construct_stoc_psk(SSL *s, WPACKET *pkt, unsigned int context, |
1273 | X509 *x, size_t chainidx, int *al) | |
0247086d MC |
1274 | { |
1275 | if (!s->hit) | |
b186a592 | 1276 | return EXT_RETURN_NOT_SENT; |
0247086d MC |
1277 | |
1278 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk) | |
1279 | || !WPACKET_start_sub_packet_u16(pkt) | |
1280 | || !WPACKET_put_bytes_u16(pkt, s->session->ext.tick_identity) | |
1281 | || !WPACKET_close(pkt)) { | |
1282 | SSLerr(SSL_F_TLS_CONSTRUCT_STOC_PSK, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1283 | return EXT_RETURN_FAIL; |
0247086d MC |
1284 | } |
1285 | ||
b186a592 | 1286 | return EXT_RETURN_SENT; |
0247086d | 1287 | } |