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25670f3e | 1 | /* |
3c95ef22 | 2 | * Copyright 2016-2023 The OpenSSL Project Authors. All Rights Reserved. |
25670f3e | 3 | * |
2c18d164 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
25670f3e MC |
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> | |
706457b7 DMSP |
11 | #include "../ssl_local.h" |
12 | #include "statem_local.h" | |
43054d3d MC |
13 | #include "internal/cryptlib.h" |
14 | ||
e8a557dc | 15 | #define COOKIE_STATE_FORMAT_VERSION 1 |
43054d3d MC |
16 | |
17 | /* | |
18 | * 2 bytes for packet length, 2 bytes for format version, 2 bytes for | |
19 | * protocol version, 2 bytes for group id, 2 bytes for cipher id, 1 byte for | |
e8a557dc | 20 | * key_share present flag, 8 bytes for timestamp, 2 bytes for the hashlen, |
d0debc0a MC |
21 | * EVP_MAX_MD_SIZE for transcript hash, 1 byte for app cookie length, app cookie |
22 | * length bytes, SHA256_DIGEST_LENGTH bytes for the HMAC of the whole thing. | |
43054d3d | 23 | */ |
e8a557dc | 24 | #define MAX_COOKIE_SIZE (2 + 2 + 2 + 2 + 2 + 1 + 8 + 2 + EVP_MAX_MD_SIZE + 1 \ |
43054d3d MC |
25 | + SSL_COOKIE_LENGTH + SHA256_DIGEST_LENGTH) |
26 | ||
27 | /* | |
28 | * Message header + 2 bytes for protocol version + number of random bytes + | |
97ea1e7f MC |
29 | * + 1 byte for legacy session id length + number of bytes in legacy session id |
30 | * + 2 bytes for ciphersuite + 1 byte for legacy compression | |
31 | * + 2 bytes for extension block length + 6 bytes for key_share extension | |
32 | * + 4 bytes for cookie extension header + the number of bytes in the cookie | |
43054d3d | 33 | */ |
97ea1e7f | 34 | #define MAX_HRR_SIZE (SSL3_HM_HEADER_LENGTH + 2 + SSL3_RANDOM_SIZE + 1 \ |
43054d3d MC |
35 | + SSL_MAX_SSL_SESSION_ID_LENGTH + 2 + 1 + 2 + 6 + 4 \ |
36 | + MAX_COOKIE_SIZE) | |
25670f3e MC |
37 | |
38 | /* | |
39 | * Parse the client's renegotiation binding and abort if it's not right | |
40 | */ | |
38b051a1 TM |
41 | int tls_parse_ctos_renegotiate(SSL_CONNECTION *s, PACKET *pkt, |
42 | unsigned int context, | |
f63a17d6 | 43 | X509 *x, size_t chainidx) |
25670f3e MC |
44 | { |
45 | unsigned int ilen; | |
46 | const unsigned char *data; | |
2b9e2afc | 47 | int ok; |
25670f3e MC |
48 | |
49 | /* Parse the length byte */ | |
50 | if (!PACKET_get_1(pkt, &ilen) | |
51 | || !PACKET_get_bytes(pkt, &data, ilen)) { | |
c48ffbcc | 52 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_RENEGOTIATION_ENCODING_ERR); |
25670f3e MC |
53 | return 0; |
54 | } | |
55 | ||
56 | /* Check that the extension matches */ | |
555cbb32 | 57 | if (ilen != s->s3.previous_client_finished_len) { |
c48ffbcc | 58 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_RENEGOTIATION_MISMATCH); |
25670f3e MC |
59 | return 0; |
60 | } | |
61 | ||
2b9e2afc PA |
62 | ok = memcmp(data, s->s3.previous_client_finished, |
63 | s->s3.previous_client_finished_len); | |
64 | #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION | |
65 | if (ok) { | |
1dbfd7fe | 66 | if ((data[0] ^ s->s3.previous_client_finished[0]) != 0xFF) { |
2b9e2afc PA |
67 | ok = 0; |
68 | } | |
69 | } | |
70 | #endif | |
71 | if (ok) { | |
c48ffbcc | 72 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_RENEGOTIATION_MISMATCH); |
25670f3e MC |
73 | return 0; |
74 | } | |
75 | ||
555cbb32 | 76 | s->s3.send_connection_binding = 1; |
25670f3e MC |
77 | |
78 | return 1; | |
79 | } | |
80 | ||
1266eefd MC |
81 | /*- |
82 | * The servername extension is treated as follows: | |
83 | * | |
84 | * - Only the hostname type is supported with a maximum length of 255. | |
85 | * - The servername is rejected if too long or if it contains zeros, | |
86 | * in which case an fatal alert is generated. | |
87 | * - The servername field is maintained together with the session cache. | |
88 | * - When a session is resumed, the servername call back invoked in order | |
89 | * to allow the application to position itself to the right context. | |
90 | * - The servername is acknowledged if it is new for a session or when | |
91 | * it is identical to a previously used for the same session. | |
92 | * Applications can control the behaviour. They can at any time | |
93 | * set a 'desirable' servername for a new SSL object. This can be the | |
94 | * case for example with HTTPS when a Host: header field is received and | |
95 | * a renegotiation is requested. In this case, a possible servername | |
96 | * presented in the new client hello is only acknowledged if it matches | |
97 | * the value of the Host: field. | |
98 | * - Applications must use SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION | |
99 | * if they provide for changing an explicit servername context for the | |
100 | * session, i.e. when the session has been established with a servername | |
101 | * extension. | |
102 | * - On session reconnect, the servername extension may be absent. | |
103 | */ | |
38b051a1 TM |
104 | int tls_parse_ctos_server_name(SSL_CONNECTION *s, PACKET *pkt, |
105 | unsigned int context, X509 *x, size_t chainidx) | |
25670f3e MC |
106 | { |
107 | unsigned int servname_type; | |
108 | PACKET sni, hostname; | |
109 | ||
25670f3e MC |
110 | if (!PACKET_as_length_prefixed_2(pkt, &sni) |
111 | /* ServerNameList must be at least 1 byte long. */ | |
112 | || PACKET_remaining(&sni) == 0) { | |
c48ffbcc | 113 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
114 | return 0; |
115 | } | |
116 | ||
117 | /* | |
44e69951 F |
118 | * Although the intent was for server_name to be extensible, RFC 4366 |
119 | * was not clear about it; and so OpenSSL among other implementations, | |
120 | * always and only allows a 'host_name' name types. | |
25670f3e MC |
121 | * RFC 6066 corrected the mistake but adding new name types |
122 | * is nevertheless no longer feasible, so act as if no other | |
123 | * SNI types can exist, to simplify parsing. | |
124 | * | |
125 | * Also note that the RFC permits only one SNI value per type, | |
126 | * i.e., we can only have a single hostname. | |
127 | */ | |
128 | if (!PACKET_get_1(&sni, &servname_type) | |
129 | || servname_type != TLSEXT_NAMETYPE_host_name | |
130 | || !PACKET_as_length_prefixed_2(&sni, &hostname)) { | |
c48ffbcc | 131 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
132 | return 0; |
133 | } | |
134 | ||
7955c1f1 MC |
135 | /* |
136 | * In TLSv1.2 and below the SNI is associated with the session. In TLSv1.3 | |
137 | * we always use the SNI value from the handshake. | |
138 | */ | |
38b051a1 | 139 | if (!s->hit || SSL_CONNECTION_IS_TLS13(s)) { |
25670f3e | 140 | if (PACKET_remaining(&hostname) > TLSEXT_MAXLEN_host_name) { |
c48ffbcc | 141 | SSLfatal(s, SSL_AD_UNRECOGNIZED_NAME, SSL_R_BAD_EXTENSION); |
25670f3e MC |
142 | return 0; |
143 | } | |
144 | ||
145 | if (PACKET_contains_zero_byte(&hostname)) { | |
c48ffbcc | 146 | SSLfatal(s, SSL_AD_UNRECOGNIZED_NAME, SSL_R_BAD_EXTENSION); |
25670f3e MC |
147 | return 0; |
148 | } | |
149 | ||
1c4aa31d BK |
150 | /* |
151 | * Store the requested SNI in the SSL as temporary storage. | |
152 | * If we accept it, it will get stored in the SSL_SESSION as well. | |
153 | */ | |
154 | OPENSSL_free(s->ext.hostname); | |
155 | s->ext.hostname = NULL; | |
156 | if (!PACKET_strndup(&hostname, &s->ext.hostname)) { | |
c48ffbcc | 157 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
158 | return 0; |
159 | } | |
160 | ||
161 | s->servername_done = 1; | |
7955c1f1 MC |
162 | } else { |
163 | /* | |
164 | * In TLSv1.2 and below we should check if the SNI is consistent between | |
165 | * the initial handshake and the resumption. In TLSv1.3 SNI is not | |
166 | * associated with the session. | |
167 | */ | |
1c4aa31d | 168 | s->servername_done = (s->session->ext.hostname != NULL) |
aff8c126 RS |
169 | && PACKET_equal(&hostname, s->session->ext.hostname, |
170 | strlen(s->session->ext.hostname)); | |
25670f3e MC |
171 | } |
172 | ||
173 | return 1; | |
174 | } | |
175 | ||
38b051a1 TM |
176 | int tls_parse_ctos_maxfragmentlen(SSL_CONNECTION *s, PACKET *pkt, |
177 | unsigned int context, | |
f63a17d6 | 178 | X509 *x, size_t chainidx) |
cf72c757 F |
179 | { |
180 | unsigned int value; | |
181 | ||
182 | if (PACKET_remaining(pkt) != 1 || !PACKET_get_1(pkt, &value)) { | |
c48ffbcc | 183 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
cf72c757 F |
184 | return 0; |
185 | } | |
186 | ||
187 | /* Received |value| should be a valid max-fragment-length code. */ | |
188 | if (!IS_MAX_FRAGMENT_LENGTH_EXT_VALID(value)) { | |
f63a17d6 | 189 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 | 190 | SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); |
cf72c757 F |
191 | return 0; |
192 | } | |
193 | ||
194 | /* | |
195 | * RFC 6066: The negotiated length applies for the duration of the session | |
196 | * including session resumptions. | |
197 | * We should receive the same code as in resumed session ! | |
198 | */ | |
199 | if (s->hit && s->session->ext.max_fragment_len_mode != value) { | |
f63a17d6 | 200 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 | 201 | SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); |
cf72c757 F |
202 | return 0; |
203 | } | |
204 | ||
205 | /* | |
206 | * Store it in session, so it'll become binding for us | |
207 | * and we'll include it in a next Server Hello. | |
208 | */ | |
209 | s->session->ext.max_fragment_len_mode = value; | |
210 | return 1; | |
211 | } | |
212 | ||
25670f3e | 213 | #ifndef OPENSSL_NO_SRP |
38b051a1 TM |
214 | int tls_parse_ctos_srp(SSL_CONNECTION *s, PACKET *pkt, unsigned int context, |
215 | X509 *x, size_t chainidx) | |
25670f3e MC |
216 | { |
217 | PACKET srp_I; | |
218 | ||
219 | if (!PACKET_as_length_prefixed_1(pkt, &srp_I) | |
220 | || PACKET_contains_zero_byte(&srp_I)) { | |
c48ffbcc | 221 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
222 | return 0; |
223 | } | |
224 | ||
25670f3e | 225 | if (!PACKET_strndup(&srp_I, &s->srp_ctx.login)) { |
c48ffbcc | 226 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
227 | return 0; |
228 | } | |
229 | ||
230 | return 1; | |
231 | } | |
232 | #endif | |
233 | ||
38b051a1 TM |
234 | int tls_parse_ctos_ec_pt_formats(SSL_CONNECTION *s, PACKET *pkt, |
235 | unsigned int context, | |
f63a17d6 | 236 | X509 *x, size_t chainidx) |
25670f3e MC |
237 | { |
238 | PACKET ec_point_format_list; | |
239 | ||
240 | if (!PACKET_as_length_prefixed_1(pkt, &ec_point_format_list) | |
241 | || PACKET_remaining(&ec_point_format_list) == 0) { | |
c48ffbcc | 242 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
243 | return 0; |
244 | } | |
245 | ||
246 | if (!s->hit) { | |
247 | if (!PACKET_memdup(&ec_point_format_list, | |
cd0fb43c MC |
248 | &s->ext.peer_ecpointformats, |
249 | &s->ext.peer_ecpointformats_len)) { | |
c48ffbcc | 250 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
251 | return 0; |
252 | } | |
253 | } | |
254 | ||
255 | return 1; | |
256 | } | |
25670f3e | 257 | |
38b051a1 TM |
258 | int tls_parse_ctos_session_ticket(SSL_CONNECTION *s, PACKET *pkt, |
259 | unsigned int context, | |
f63a17d6 | 260 | X509 *x, size_t chainidx) |
25670f3e | 261 | { |
aff8c126 | 262 | if (s->ext.session_ticket_cb && |
38b051a1 TM |
263 | !s->ext.session_ticket_cb(SSL_CONNECTION_GET_SSL(s), |
264 | PACKET_data(pkt), PACKET_remaining(pkt), | |
265 | s->ext.session_ticket_cb_arg)) { | |
c48ffbcc | 266 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
267 | return 0; |
268 | } | |
269 | ||
270 | return 1; | |
271 | } | |
272 | ||
38b051a1 | 273 | int tls_parse_ctos_sig_algs_cert(SSL_CONNECTION *s, PACKET *pkt, |
a7e6a3d8 P |
274 | ossl_unused unsigned int context, |
275 | ossl_unused X509 *x, | |
276 | ossl_unused size_t chainidx) | |
c589c34e BK |
277 | { |
278 | PACKET supported_sig_algs; | |
279 | ||
280 | if (!PACKET_as_length_prefixed_2(pkt, &supported_sig_algs) | |
281 | || PACKET_remaining(&supported_sig_algs) == 0) { | |
c48ffbcc | 282 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
c589c34e BK |
283 | return 0; |
284 | } | |
285 | ||
286 | if (!s->hit && !tls1_save_sigalgs(s, &supported_sig_algs, 1)) { | |
c48ffbcc | 287 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
c589c34e BK |
288 | return 0; |
289 | } | |
290 | ||
291 | return 1; | |
292 | } | |
293 | ||
38b051a1 TM |
294 | int tls_parse_ctos_sig_algs(SSL_CONNECTION *s, PACKET *pkt, |
295 | unsigned int context, X509 *x, size_t chainidx) | |
25670f3e MC |
296 | { |
297 | PACKET supported_sig_algs; | |
298 | ||
299 | if (!PACKET_as_length_prefixed_2(pkt, &supported_sig_algs) | |
25670f3e | 300 | || PACKET_remaining(&supported_sig_algs) == 0) { |
c48ffbcc | 301 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
302 | return 0; |
303 | } | |
304 | ||
c589c34e | 305 | if (!s->hit && !tls1_save_sigalgs(s, &supported_sig_algs, 0)) { |
c48ffbcc | 306 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
307 | return 0; |
308 | } | |
309 | ||
310 | return 1; | |
311 | } | |
312 | ||
ab83e314 | 313 | #ifndef OPENSSL_NO_OCSP |
38b051a1 TM |
314 | int tls_parse_ctos_status_request(SSL_CONNECTION *s, PACKET *pkt, |
315 | unsigned int context, | |
f63a17d6 | 316 | X509 *x, size_t chainidx) |
25670f3e | 317 | { |
1266eefd MC |
318 | PACKET responder_id_list, exts; |
319 | ||
ded4a83d MC |
320 | /* We ignore this in a resumption handshake */ |
321 | if (s->hit) | |
322 | return 1; | |
323 | ||
e96e0f8e MC |
324 | /* Not defined if we get one of these in a client Certificate */ |
325 | if (x != NULL) | |
326 | return 1; | |
327 | ||
aff8c126 | 328 | if (!PACKET_get_1(pkt, (unsigned int *)&s->ext.status_type)) { |
c48ffbcc | 329 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
330 | return 0; |
331 | } | |
ab83e314 | 332 | |
aff8c126 | 333 | if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) { |
25670f3e | 334 | /* |
1266eefd | 335 | * We don't know what to do with any other type so ignore it. |
25670f3e | 336 | */ |
aff8c126 | 337 | s->ext.status_type = TLSEXT_STATUSTYPE_nothing; |
1266eefd MC |
338 | return 1; |
339 | } | |
25670f3e | 340 | |
1266eefd | 341 | if (!PACKET_get_length_prefixed_2 (pkt, &responder_id_list)) { |
c48ffbcc | 342 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1266eefd MC |
343 | return 0; |
344 | } | |
25670f3e | 345 | |
1266eefd MC |
346 | /* |
347 | * We remove any OCSP_RESPIDs from a previous handshake | |
348 | * to prevent unbounded memory growth - CVE-2016-6304 | |
349 | */ | |
aff8c126 | 350 | sk_OCSP_RESPID_pop_free(s->ext.ocsp.ids, OCSP_RESPID_free); |
1266eefd | 351 | if (PACKET_remaining(&responder_id_list) > 0) { |
aff8c126 RS |
352 | s->ext.ocsp.ids = sk_OCSP_RESPID_new_null(); |
353 | if (s->ext.ocsp.ids == NULL) { | |
e077455e | 354 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
1266eefd MC |
355 | return 0; |
356 | } | |
357 | } else { | |
aff8c126 | 358 | s->ext.ocsp.ids = NULL; |
1266eefd | 359 | } |
25670f3e | 360 | |
1266eefd MC |
361 | while (PACKET_remaining(&responder_id_list) > 0) { |
362 | OCSP_RESPID *id; | |
363 | PACKET responder_id; | |
364 | const unsigned char *id_data; | |
25670f3e | 365 | |
1266eefd MC |
366 | if (!PACKET_get_length_prefixed_2(&responder_id_list, &responder_id) |
367 | || PACKET_remaining(&responder_id) == 0) { | |
c48ffbcc | 368 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1266eefd MC |
369 | return 0; |
370 | } | |
25670f3e | 371 | |
1266eefd | 372 | id_data = PACKET_data(&responder_id); |
1266eefd MC |
373 | id = d2i_OCSP_RESPID(NULL, &id_data, |
374 | (int)PACKET_remaining(&responder_id)); | |
375 | if (id == NULL) { | |
c48ffbcc | 376 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1266eefd | 377 | return 0; |
25670f3e MC |
378 | } |
379 | ||
1266eefd MC |
380 | if (id_data != PACKET_end(&responder_id)) { |
381 | OCSP_RESPID_free(id); | |
c48ffbcc | 382 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
f63a17d6 | 383 | |
25670f3e MC |
384 | return 0; |
385 | } | |
386 | ||
aff8c126 | 387 | if (!sk_OCSP_RESPID_push(s->ext.ocsp.ids, id)) { |
1266eefd | 388 | OCSP_RESPID_free(id); |
c48ffbcc | 389 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f63a17d6 | 390 | |
1266eefd MC |
391 | return 0; |
392 | } | |
393 | } | |
394 | ||
395 | /* Read in request_extensions */ | |
396 | if (!PACKET_as_length_prefixed_2(pkt, &exts)) { | |
c48ffbcc | 397 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1266eefd MC |
398 | return 0; |
399 | } | |
400 | ||
401 | if (PACKET_remaining(&exts) > 0) { | |
402 | const unsigned char *ext_data = PACKET_data(&exts); | |
403 | ||
aff8c126 | 404 | sk_X509_EXTENSION_pop_free(s->ext.ocsp.exts, |
1266eefd | 405 | X509_EXTENSION_free); |
aff8c126 | 406 | s->ext.ocsp.exts = |
1266eefd | 407 | d2i_X509_EXTENSIONS(NULL, &ext_data, (int)PACKET_remaining(&exts)); |
aff8c126 | 408 | if (s->ext.ocsp.exts == NULL || ext_data != PACKET_end(&exts)) { |
c48ffbcc | 409 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1266eefd | 410 | return 0; |
25670f3e | 411 | } |
25670f3e MC |
412 | } |
413 | ||
414 | return 1; | |
415 | } | |
ab83e314 | 416 | #endif |
25670f3e MC |
417 | |
418 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
38b051a1 TM |
419 | int tls_parse_ctos_npn(SSL_CONNECTION *s, PACKET *pkt, unsigned int context, |
420 | X509 *x, size_t chainidx) | |
25670f3e | 421 | { |
1266eefd MC |
422 | /* |
423 | * We shouldn't accept this extension on a | |
424 | * renegotiation. | |
1266eefd | 425 | */ |
c7f47786 | 426 | if (SSL_IS_FIRST_HANDSHAKE(s)) |
555cbb32 | 427 | s->s3.npn_seen = 1; |
25670f3e MC |
428 | |
429 | return 1; | |
430 | } | |
431 | #endif | |
432 | ||
433 | /* | |
1266eefd | 434 | * Save the ALPN extension in a ClientHello.|pkt| holds the contents of the ALPN |
29bfd5b7 | 435 | * extension, not including type and length. Returns: 1 on success, 0 on error. |
25670f3e | 436 | */ |
38b051a1 TM |
437 | int tls_parse_ctos_alpn(SSL_CONNECTION *s, PACKET *pkt, unsigned int context, |
438 | X509 *x, size_t chainidx) | |
25670f3e MC |
439 | { |
440 | PACKET protocol_list, save_protocol_list, protocol; | |
441 | ||
c7f47786 | 442 | if (!SSL_IS_FIRST_HANDSHAKE(s)) |
25670f3e MC |
443 | return 1; |
444 | ||
445 | if (!PACKET_as_length_prefixed_2(pkt, &protocol_list) | |
446 | || PACKET_remaining(&protocol_list) < 2) { | |
c48ffbcc | 447 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
448 | return 0; |
449 | } | |
450 | ||
451 | save_protocol_list = protocol_list; | |
452 | do { | |
453 | /* Protocol names can't be empty. */ | |
454 | if (!PACKET_get_length_prefixed_1(&protocol_list, &protocol) | |
455 | || PACKET_remaining(&protocol) == 0) { | |
c48ffbcc | 456 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
457 | return 0; |
458 | } | |
459 | } while (PACKET_remaining(&protocol_list) != 0); | |
460 | ||
555cbb32 TS |
461 | OPENSSL_free(s->s3.alpn_proposed); |
462 | s->s3.alpn_proposed = NULL; | |
463 | s->s3.alpn_proposed_len = 0; | |
25670f3e | 464 | if (!PACKET_memdup(&save_protocol_list, |
555cbb32 | 465 | &s->s3.alpn_proposed, &s->s3.alpn_proposed_len)) { |
c48ffbcc | 466 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
467 | return 0; |
468 | } | |
469 | ||
470 | return 1; | |
471 | } | |
472 | ||
473 | #ifndef OPENSSL_NO_SRTP | |
38b051a1 TM |
474 | int tls_parse_ctos_use_srtp(SSL_CONNECTION *s, PACKET *pkt, |
475 | unsigned int context, X509 *x, size_t chainidx) | |
25670f3e | 476 | { |
25670f3e MC |
477 | STACK_OF(SRTP_PROTECTION_PROFILE) *srvr; |
478 | unsigned int ct, mki_len, id; | |
479 | int i, srtp_pref; | |
480 | PACKET subpkt; | |
38b051a1 | 481 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
25670f3e MC |
482 | |
483 | /* Ignore this if we have no SRTP profiles */ | |
38b051a1 | 484 | if (SSL_get_srtp_profiles(ssl) == NULL) |
25670f3e MC |
485 | return 1; |
486 | ||
487 | /* Pull off the length of the cipher suite list and check it is even */ | |
1266eefd MC |
488 | if (!PACKET_get_net_2(pkt, &ct) || (ct & 1) != 0 |
489 | || !PACKET_get_sub_packet(pkt, &subpkt, ct)) { | |
c48ffbcc | 490 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
25670f3e | 491 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
25670f3e MC |
492 | return 0; |
493 | } | |
494 | ||
38b051a1 | 495 | srvr = SSL_get_srtp_profiles(ssl); |
25670f3e MC |
496 | s->srtp_profile = NULL; |
497 | /* Search all profiles for a match initially */ | |
498 | srtp_pref = sk_SRTP_PROTECTION_PROFILE_num(srvr); | |
499 | ||
500 | while (PACKET_remaining(&subpkt)) { | |
501 | if (!PACKET_get_net_2(&subpkt, &id)) { | |
c48ffbcc | 502 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
f63a17d6 | 503 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
25670f3e MC |
504 | return 0; |
505 | } | |
506 | ||
507 | /* | |
508 | * Only look for match in profiles of higher preference than | |
509 | * current match. | |
510 | * If no profiles have been have been configured then this | |
511 | * does nothing. | |
512 | */ | |
513 | for (i = 0; i < srtp_pref; i++) { | |
d270de32 | 514 | SRTP_PROTECTION_PROFILE *sprof = |
1266eefd MC |
515 | sk_SRTP_PROTECTION_PROFILE_value(srvr, i); |
516 | ||
25670f3e MC |
517 | if (sprof->id == id) { |
518 | s->srtp_profile = sprof; | |
519 | srtp_pref = i; | |
520 | break; | |
521 | } | |
522 | } | |
523 | } | |
524 | ||
1266eefd | 525 | /* Now extract the MKI value as a sanity check, but discard it for now */ |
25670f3e | 526 | if (!PACKET_get_1(pkt, &mki_len)) { |
c48ffbcc | 527 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
f63a17d6 | 528 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
25670f3e MC |
529 | return 0; |
530 | } | |
531 | ||
532 | if (!PACKET_forward(pkt, mki_len) | |
533 | || PACKET_remaining(pkt)) { | |
c48ffbcc | 534 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_SRTP_MKI_VALUE); |
25670f3e MC |
535 | return 0; |
536 | } | |
537 | ||
538 | return 1; | |
539 | } | |
540 | #endif | |
541 | ||
38b051a1 TM |
542 | int tls_parse_ctos_etm(SSL_CONNECTION *s, PACKET *pkt, unsigned int context, |
543 | X509 *x, size_t chainidx) | |
25670f3e MC |
544 | { |
545 | if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC)) | |
28a31a0a | 546 | s->ext.use_etm = 1; |
25670f3e MC |
547 | |
548 | return 1; | |
549 | } | |
550 | ||
b2f7e8c0 MC |
551 | /* |
552 | * Process a psk_kex_modes extension received in the ClientHello. |pkt| contains | |
553 | * the raw PACKET data for the extension. Returns 1 on success or 0 on failure. | |
b2f7e8c0 | 554 | */ |
38b051a1 TM |
555 | int tls_parse_ctos_psk_kex_modes(SSL_CONNECTION *s, PACKET *pkt, |
556 | unsigned int context, | |
f63a17d6 | 557 | X509 *x, size_t chainidx) |
b2f7e8c0 MC |
558 | { |
559 | #ifndef OPENSSL_NO_TLS1_3 | |
560 | PACKET psk_kex_modes; | |
561 | unsigned int mode; | |
562 | ||
563 | if (!PACKET_as_length_prefixed_1(pkt, &psk_kex_modes) | |
564 | || PACKET_remaining(&psk_kex_modes) == 0) { | |
c48ffbcc | 565 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
b2f7e8c0 MC |
566 | return 0; |
567 | } | |
568 | ||
569 | while (PACKET_get_1(&psk_kex_modes, &mode)) { | |
570 | if (mode == TLSEXT_KEX_MODE_KE_DHE) | |
571 | s->ext.psk_kex_mode |= TLSEXT_KEX_MODE_FLAG_KE_DHE; | |
e3c0d76b MC |
572 | else if (mode == TLSEXT_KEX_MODE_KE |
573 | && (s->options & SSL_OP_ALLOW_NO_DHE_KEX) != 0) | |
b2f7e8c0 MC |
574 | s->ext.psk_kex_mode |= TLSEXT_KEX_MODE_FLAG_KE; |
575 | } | |
576 | #endif | |
577 | ||
578 | return 1; | |
579 | } | |
580 | ||
25670f3e MC |
581 | /* |
582 | * Process a key_share extension received in the ClientHello. |pkt| contains | |
583 | * the raw PACKET data for the extension. Returns 1 on success or 0 on failure. | |
25670f3e | 584 | */ |
38b051a1 TM |
585 | int tls_parse_ctos_key_share(SSL_CONNECTION *s, PACKET *pkt, |
586 | unsigned int context, X509 *x, size_t chainidx) | |
25670f3e | 587 | { |
3cf96e88 | 588 | #ifndef OPENSSL_NO_TLS1_3 |
25670f3e MC |
589 | unsigned int group_id; |
590 | PACKET key_share_list, encoded_pt; | |
f48d826e DSH |
591 | const uint16_t *clntgroups, *srvrgroups; |
592 | size_t clnt_num_groups, srvr_num_groups; | |
43b95d73 | 593 | int found = 0; |
25670f3e | 594 | |
f4bbb37c | 595 | if (s->hit && (s->ext.psk_kex_mode & TLSEXT_KEX_MODE_FLAG_KE_DHE) == 0) |
25670f3e MC |
596 | return 1; |
597 | ||
598 | /* Sanity check */ | |
555cbb32 | 599 | if (s->s3.peer_tmp != NULL) { |
c48ffbcc | 600 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
601 | return 0; |
602 | } | |
603 | ||
604 | if (!PACKET_as_length_prefixed_2(pkt, &key_share_list)) { | |
c48ffbcc | 605 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
25670f3e MC |
606 | return 0; |
607 | } | |
608 | ||
f48d826e DSH |
609 | /* Get our list of supported groups */ |
610 | tls1_get_supported_groups(s, &srvrgroups, &srvr_num_groups); | |
611 | /* Get the clients list of supported groups. */ | |
612 | tls1_get_peer_groups(s, &clntgroups, &clnt_num_groups); | |
613 | if (clnt_num_groups == 0) { | |
b6fdc12d MC |
614 | /* |
615 | * This can only happen if the supported_groups extension was not sent, | |
616 | * because we verify that the length is non-zero when we process that | |
617 | * extension. | |
618 | */ | |
c48ffbcc | 619 | SSLfatal(s, SSL_AD_MISSING_EXTENSION, |
f63a17d6 | 620 | SSL_R_MISSING_SUPPORTED_GROUPS_EXTENSION); |
b6fdc12d MC |
621 | return 0; |
622 | } | |
25670f3e | 623 | |
555cbb32 | 624 | if (s->s3.group_id != 0 && PACKET_remaining(&key_share_list) == 0) { |
43054d3d MC |
625 | /* |
626 | * If we set a group_id already, then we must have sent an HRR | |
627 | * requesting a new key_share. If we haven't got one then that is an | |
628 | * error | |
629 | */ | |
c48ffbcc | 630 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_KEY_SHARE); |
43054d3d MC |
631 | return 0; |
632 | } | |
633 | ||
25670f3e MC |
634 | while (PACKET_remaining(&key_share_list) > 0) { |
635 | if (!PACKET_get_net_2(&key_share_list, &group_id) | |
636 | || !PACKET_get_length_prefixed_2(&key_share_list, &encoded_pt) | |
637 | || PACKET_remaining(&encoded_pt) == 0) { | |
c48ffbcc | 638 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
25670f3e MC |
639 | return 0; |
640 | } | |
641 | ||
642 | /* | |
643 | * If we already found a suitable key_share we loop through the | |
644 | * rest to verify the structure, but don't process them. | |
645 | */ | |
646 | if (found) | |
647 | continue; | |
648 | ||
43054d3d MC |
649 | /* |
650 | * If we sent an HRR then the key_share sent back MUST be for the group | |
651 | * we requested, and must be the only key_share sent. | |
652 | */ | |
555cbb32 | 653 | if (s->s3.group_id != 0 |
16f0e91c | 654 | && (group_id != s->s3.group_id |
43054d3d | 655 | || PACKET_remaining(&key_share_list) != 0)) { |
c48ffbcc | 656 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_KEY_SHARE); |
43054d3d MC |
657 | return 0; |
658 | } | |
659 | ||
25670f3e | 660 | /* Check if this share is in supported_groups sent from client */ |
f48d826e | 661 | if (!check_in_list(s, group_id, clntgroups, clnt_num_groups, 0)) { |
c48ffbcc | 662 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_KEY_SHARE); |
25670f3e MC |
663 | return 0; |
664 | } | |
665 | ||
666 | /* Check if this share is for a group we can use */ | |
247b8e52 MC |
667 | if (!check_in_list(s, group_id, srvrgroups, srvr_num_groups, 1) |
668 | || !tls_group_allowed(s, group_id, SSL_SECOP_CURVE_SUPPORTED) | |
669 | /* | |
670 | * We tolerate but ignore a group id that we don't think is | |
671 | * suitable for TLSv1.3 | |
672 | */ | |
673 | || !tls_valid_group(s, group_id, TLS1_3_VERSION, TLS1_3_VERSION, | |
674 | 0, NULL)) { | |
25670f3e MC |
675 | /* Share not suitable */ |
676 | continue; | |
677 | } | |
678 | ||
0a10825a BE |
679 | s->s3.group_id = group_id; |
680 | /* Cache the selected group ID in the SSL_SESSION */ | |
681 | s->session->kex_group = group_id; | |
682 | ||
ada66e78 | 683 | if ((s->s3.peer_tmp = ssl_generate_param_group(s, group_id)) == NULL) { |
c48ffbcc | 684 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
25670f3e MC |
685 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
686 | return 0; | |
687 | } | |
688 | ||
d5530efa TM |
689 | if (tls13_set_encoded_pub_key(s->s3.peer_tmp, |
690 | PACKET_data(&encoded_pt), | |
691 | PACKET_remaining(&encoded_pt)) <= 0) { | |
c48ffbcc | 692 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_ECPOINT); |
25670f3e MC |
693 | return 0; |
694 | } | |
695 | ||
696 | found = 1; | |
697 | } | |
3cf96e88 | 698 | #endif |
25670f3e MC |
699 | |
700 | return 1; | |
701 | } | |
702 | ||
38b051a1 TM |
703 | int tls_parse_ctos_cookie(SSL_CONNECTION *s, PACKET *pkt, unsigned int context, |
704 | X509 *x, size_t chainidx) | |
43054d3d | 705 | { |
1aac20f5 | 706 | #ifndef OPENSSL_NO_TLS1_3 |
dd77962e | 707 | unsigned int format, version, key_share, group_id; |
43054d3d MC |
708 | EVP_MD_CTX *hctx; |
709 | EVP_PKEY *pkey; | |
710 | PACKET cookie, raw, chhash, appcookie; | |
711 | WPACKET hrrpkt; | |
712 | const unsigned char *data, *mdin, *ciphdata; | |
713 | unsigned char hmac[SHA256_DIGEST_LENGTH]; | |
714 | unsigned char hrr[MAX_HRR_SIZE]; | |
715 | size_t rawlen, hmaclen, hrrlen, ciphlen; | |
e8a557dc | 716 | uint64_t tm, now; |
38b051a1 TM |
717 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
718 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); | |
43054d3d MC |
719 | |
720 | /* Ignore any cookie if we're not set up to verify it */ | |
38b051a1 | 721 | if (sctx->verify_stateless_cookie_cb == NULL |
555cbb32 | 722 | || (s->s3.flags & TLS1_FLAGS_STATELESS) == 0) |
43054d3d MC |
723 | return 1; |
724 | ||
725 | if (!PACKET_as_length_prefixed_2(pkt, &cookie)) { | |
c48ffbcc | 726 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
727 | return 0; |
728 | } | |
729 | ||
730 | raw = cookie; | |
731 | data = PACKET_data(&raw); | |
732 | rawlen = PACKET_remaining(&raw); | |
733 | if (rawlen < SHA256_DIGEST_LENGTH | |
734 | || !PACKET_forward(&raw, rawlen - SHA256_DIGEST_LENGTH)) { | |
c48ffbcc | 735 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
736 | return 0; |
737 | } | |
738 | mdin = PACKET_data(&raw); | |
739 | ||
740 | /* Verify the HMAC of the cookie */ | |
741 | hctx = EVP_MD_CTX_create(); | |
38b051a1 TM |
742 | pkey = EVP_PKEY_new_raw_private_key_ex(sctx->libctx, "HMAC", |
743 | sctx->propq, | |
d8652be0 MC |
744 | s->session_ctx->ext.cookie_hmac_key, |
745 | sizeof(s->session_ctx->ext.cookie_hmac_key)); | |
43054d3d MC |
746 | if (hctx == NULL || pkey == NULL) { |
747 | EVP_MD_CTX_free(hctx); | |
748 | EVP_PKEY_free(pkey); | |
e077455e | 749 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
43054d3d MC |
750 | return 0; |
751 | } | |
752 | ||
97ea1e7f | 753 | hmaclen = SHA256_DIGEST_LENGTH; |
38b051a1 TM |
754 | if (EVP_DigestSignInit_ex(hctx, NULL, "SHA2-256", sctx->libctx, |
755 | sctx->propq, pkey, NULL) <= 0 | |
97ea1e7f MC |
756 | || EVP_DigestSign(hctx, hmac, &hmaclen, data, |
757 | rawlen - SHA256_DIGEST_LENGTH) <= 0 | |
43054d3d MC |
758 | || hmaclen != SHA256_DIGEST_LENGTH) { |
759 | EVP_MD_CTX_free(hctx); | |
760 | EVP_PKEY_free(pkey); | |
c48ffbcc | 761 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
762 | return 0; |
763 | } | |
764 | ||
765 | EVP_MD_CTX_free(hctx); | |
766 | EVP_PKEY_free(pkey); | |
767 | ||
768 | if (CRYPTO_memcmp(hmac, mdin, SHA256_DIGEST_LENGTH) != 0) { | |
c48ffbcc | 769 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_COOKIE_MISMATCH); |
43054d3d MC |
770 | return 0; |
771 | } | |
772 | ||
773 | if (!PACKET_get_net_2(&cookie, &format)) { | |
c48ffbcc | 774 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
775 | return 0; |
776 | } | |
777 | /* Check the cookie format is something we recognise. Ignore it if not */ | |
778 | if (format != COOKIE_STATE_FORMAT_VERSION) | |
779 | return 1; | |
780 | ||
781 | /* | |
782 | * The rest of these checks really shouldn't fail since we have verified the | |
783 | * HMAC above. | |
784 | */ | |
785 | ||
786 | /* Check the version number is sane */ | |
787 | if (!PACKET_get_net_2(&cookie, &version)) { | |
c48ffbcc | 788 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
789 | return 0; |
790 | } | |
791 | if (version != TLS1_3_VERSION) { | |
c48ffbcc | 792 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
43054d3d MC |
793 | SSL_R_BAD_PROTOCOL_VERSION_NUMBER); |
794 | return 0; | |
795 | } | |
796 | ||
dd77962e | 797 | if (!PACKET_get_net_2(&cookie, &group_id)) { |
c48ffbcc | 798 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
799 | return 0; |
800 | } | |
dd77962e | 801 | |
43054d3d MC |
802 | ciphdata = PACKET_data(&cookie); |
803 | if (!PACKET_forward(&cookie, 2)) { | |
c48ffbcc | 804 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
805 | return 0; |
806 | } | |
555cbb32 TS |
807 | if (group_id != s->s3.group_id |
808 | || s->s3.tmp.new_cipher | |
dd77962e MC |
809 | != ssl_get_cipher_by_char(s, ciphdata, 0)) { |
810 | /* | |
811 | * We chose a different cipher or group id this time around to what is | |
812 | * in the cookie. Something must have changed. | |
813 | */ | |
c48ffbcc | 814 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_CIPHER); |
43054d3d MC |
815 | return 0; |
816 | } | |
817 | ||
818 | if (!PACKET_get_1(&cookie, &key_share) | |
e8a557dc | 819 | || !PACKET_get_net_8(&cookie, &tm) |
43054d3d MC |
820 | || !PACKET_get_length_prefixed_2(&cookie, &chhash) |
821 | || !PACKET_get_length_prefixed_1(&cookie, &appcookie) | |
822 | || PACKET_remaining(&cookie) != SHA256_DIGEST_LENGTH) { | |
c48ffbcc | 823 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
824 | return 0; |
825 | } | |
826 | ||
d0debc0a | 827 | /* We tolerate a cookie age of up to 10 minutes (= 60 * 10 seconds) */ |
e8a557dc | 828 | now = time(NULL); |
d0debc0a MC |
829 | if (tm > now || (now - tm) > 600) { |
830 | /* Cookie is stale. Ignore it */ | |
831 | return 1; | |
832 | } | |
833 | ||
43054d3d | 834 | /* Verify the app cookie */ |
38b051a1 TM |
835 | if (sctx->verify_stateless_cookie_cb(ssl, |
836 | PACKET_data(&appcookie), | |
837 | PACKET_remaining(&appcookie)) == 0) { | |
c48ffbcc | 838 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_COOKIE_MISMATCH); |
43054d3d MC |
839 | return 0; |
840 | } | |
841 | ||
842 | /* | |
843 | * Reconstruct the HRR that we would have sent in response to the original | |
844 | * ClientHello so we can add it to the transcript hash. | |
845 | * Note: This won't work with custom HRR extensions | |
846 | */ | |
847 | if (!WPACKET_init_static_len(&hrrpkt, hrr, sizeof(hrr), 0)) { | |
c48ffbcc | 848 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
849 | return 0; |
850 | } | |
851 | if (!WPACKET_put_bytes_u8(&hrrpkt, SSL3_MT_SERVER_HELLO) | |
852 | || !WPACKET_start_sub_packet_u24(&hrrpkt) | |
853 | || !WPACKET_put_bytes_u16(&hrrpkt, TLS1_2_VERSION) | |
854 | || !WPACKET_memcpy(&hrrpkt, hrrrandom, SSL3_RANDOM_SIZE) | |
855 | || !WPACKET_sub_memcpy_u8(&hrrpkt, s->tmp_session_id, | |
856 | s->tmp_session_id_len) | |
38b051a1 TM |
857 | || !ssl->method->put_cipher_by_char(s->s3.tmp.new_cipher, &hrrpkt, |
858 | &ciphlen) | |
43054d3d MC |
859 | || !WPACKET_put_bytes_u8(&hrrpkt, 0) |
860 | || !WPACKET_start_sub_packet_u16(&hrrpkt)) { | |
861 | WPACKET_cleanup(&hrrpkt); | |
c48ffbcc | 862 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
863 | return 0; |
864 | } | |
865 | if (!WPACKET_put_bytes_u16(&hrrpkt, TLSEXT_TYPE_supported_versions) | |
866 | || !WPACKET_start_sub_packet_u16(&hrrpkt) | |
35e742ec | 867 | || !WPACKET_put_bytes_u16(&hrrpkt, s->version) |
43054d3d MC |
868 | || !WPACKET_close(&hrrpkt)) { |
869 | WPACKET_cleanup(&hrrpkt); | |
c48ffbcc | 870 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
871 | return 0; |
872 | } | |
873 | if (key_share) { | |
874 | if (!WPACKET_put_bytes_u16(&hrrpkt, TLSEXT_TYPE_key_share) | |
875 | || !WPACKET_start_sub_packet_u16(&hrrpkt) | |
555cbb32 | 876 | || !WPACKET_put_bytes_u16(&hrrpkt, s->s3.group_id) |
43054d3d MC |
877 | || !WPACKET_close(&hrrpkt)) { |
878 | WPACKET_cleanup(&hrrpkt); | |
c48ffbcc | 879 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
880 | return 0; |
881 | } | |
882 | } | |
883 | if (!WPACKET_put_bytes_u16(&hrrpkt, TLSEXT_TYPE_cookie) | |
884 | || !WPACKET_start_sub_packet_u16(&hrrpkt) | |
885 | || !WPACKET_sub_memcpy_u16(&hrrpkt, data, rawlen) | |
886 | || !WPACKET_close(&hrrpkt) /* cookie extension */ | |
887 | || !WPACKET_close(&hrrpkt) /* extension block */ | |
888 | || !WPACKET_close(&hrrpkt) /* message */ | |
889 | || !WPACKET_get_total_written(&hrrpkt, &hrrlen) | |
890 | || !WPACKET_finish(&hrrpkt)) { | |
891 | WPACKET_cleanup(&hrrpkt); | |
c48ffbcc | 892 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
893 | return 0; |
894 | } | |
895 | ||
896 | /* Reconstruct the transcript hash */ | |
897 | if (!create_synthetic_message_hash(s, PACKET_data(&chhash), | |
898 | PACKET_remaining(&chhash), hrr, | |
899 | hrrlen)) { | |
900 | /* SSLfatal() already called */ | |
901 | return 0; | |
902 | } | |
903 | ||
904 | /* Act as if this ClientHello came after a HelloRetryRequest */ | |
5ac7ee4d | 905 | s->hello_retry_request = SSL_HRR_PENDING; |
43054d3d | 906 | |
c36001c3 | 907 | s->ext.cookieok = 1; |
1aac20f5 | 908 | #endif |
c36001c3 | 909 | |
43054d3d MC |
910 | return 1; |
911 | } | |
912 | ||
38b051a1 TM |
913 | int tls_parse_ctos_supported_groups(SSL_CONNECTION *s, PACKET *pkt, |
914 | unsigned int context, | |
f63a17d6 | 915 | X509 *x, size_t chainidx) |
25670f3e MC |
916 | { |
917 | PACKET supported_groups_list; | |
918 | ||
919 | /* Each group is 2 bytes and we must have at least 1. */ | |
920 | if (!PACKET_as_length_prefixed_2(pkt, &supported_groups_list) | |
921 | || PACKET_remaining(&supported_groups_list) == 0 | |
922 | || (PACKET_remaining(&supported_groups_list) % 2) != 0) { | |
c48ffbcc | 923 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
924 | return 0; |
925 | } | |
926 | ||
38b051a1 | 927 | if (!s->hit || SSL_CONNECTION_IS_TLS13(s)) { |
45436e61 MC |
928 | OPENSSL_free(s->ext.peer_supportedgroups); |
929 | s->ext.peer_supportedgroups = NULL; | |
930 | s->ext.peer_supportedgroups_len = 0; | |
9e84a42d | 931 | if (!tls1_save_u16(&supported_groups_list, |
45436e61 MC |
932 | &s->ext.peer_supportedgroups, |
933 | &s->ext.peer_supportedgroups_len)) { | |
c48ffbcc | 934 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
e3743355 BK |
935 | return 0; |
936 | } | |
25670f3e MC |
937 | } |
938 | ||
939 | return 1; | |
940 | } | |
25670f3e | 941 | |
38b051a1 TM |
942 | int tls_parse_ctos_ems(SSL_CONNECTION *s, PACKET *pkt, unsigned int context, |
943 | X509 *x, size_t chainidx) | |
25670f3e MC |
944 | { |
945 | /* The extension must always be empty */ | |
946 | if (PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 947 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
948 | return 0; |
949 | } | |
950 | ||
088dfa13 TS |
951 | if (s->options & SSL_OP_NO_EXTENDED_MASTER_SECRET) |
952 | return 1; | |
953 | ||
555cbb32 | 954 | s->s3.flags |= TLS1_FLAGS_RECEIVED_EXTMS; |
25670f3e MC |
955 | |
956 | return 1; | |
957 | } | |
7da160b0 | 958 | |
38df5a45 | 959 | |
38b051a1 | 960 | int tls_parse_ctos_early_data(SSL_CONNECTION *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 961 | X509 *x, size_t chainidx) |
38df5a45 MC |
962 | { |
963 | if (PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 964 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
38df5a45 MC |
965 | return 0; |
966 | } | |
967 | ||
fc7129dc | 968 | if (s->hello_retry_request != SSL_HRR_NONE) { |
c48ffbcc | 969 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_EXTENSION); |
d4504fe5 MC |
970 | return 0; |
971 | } | |
972 | ||
38df5a45 MC |
973 | return 1; |
974 | } | |
975 | ||
38b051a1 | 976 | static SSL_TICKET_STATUS tls_get_stateful_ticket(SSL_CONNECTION *s, PACKET *tick, |
6cc0b3c2 MC |
977 | SSL_SESSION **sess) |
978 | { | |
979 | SSL_SESSION *tmpsess = NULL; | |
980 | ||
5f26ddff MC |
981 | s->ext.ticket_expected = 1; |
982 | ||
6cc0b3c2 MC |
983 | switch (PACKET_remaining(tick)) { |
984 | case 0: | |
985 | return SSL_TICKET_EMPTY; | |
986 | ||
987 | case SSL_MAX_SSL_SESSION_ID_LENGTH: | |
988 | break; | |
989 | ||
990 | default: | |
991 | return SSL_TICKET_NO_DECRYPT; | |
992 | } | |
993 | ||
994 | tmpsess = lookup_sess_in_cache(s, PACKET_data(tick), | |
995 | SSL_MAX_SSL_SESSION_ID_LENGTH); | |
996 | ||
997 | if (tmpsess == NULL) | |
998 | return SSL_TICKET_NO_DECRYPT; | |
999 | ||
6cc0b3c2 MC |
1000 | *sess = tmpsess; |
1001 | return SSL_TICKET_SUCCESS; | |
1002 | } | |
1003 | ||
38b051a1 TM |
1004 | int tls_parse_ctos_psk(SSL_CONNECTION *s, PACKET *pkt, unsigned int context, |
1005 | X509 *x, size_t chainidx) | |
1053a6e2 MC |
1006 | { |
1007 | PACKET identities, binders, binder; | |
1008 | size_t binderoffset, hashsize; | |
1009 | SSL_SESSION *sess = NULL; | |
3a7c56b2 | 1010 | unsigned int id, i, ext = 0; |
1053a6e2 | 1011 | const EVP_MD *md = NULL; |
38b051a1 TM |
1012 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
1013 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); | |
1053a6e2 | 1014 | |
1a9f457c MC |
1015 | /* |
1016 | * If we have no PSK kex mode that we recognise then we can't resume so | |
1017 | * ignore this extension | |
1018 | */ | |
1019 | if ((s->ext.psk_kex_mode | |
1020 | & (TLSEXT_KEX_MODE_FLAG_KE | TLSEXT_KEX_MODE_FLAG_KE_DHE)) == 0) | |
1021 | return 1; | |
1022 | ||
1053a6e2 | 1023 | if (!PACKET_get_length_prefixed_2(pkt, &identities)) { |
c48ffbcc | 1024 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1053a6e2 MC |
1025 | return 0; |
1026 | } | |
1027 | ||
61fb5923 | 1028 | s->ext.ticket_expected = 0; |
1053a6e2 MC |
1029 | for (id = 0; PACKET_remaining(&identities) != 0; id++) { |
1030 | PACKET identity; | |
2c604cb9 | 1031 | unsigned long ticket_agel; |
f3d40db1 | 1032 | size_t idlen; |
1053a6e2 MC |
1033 | |
1034 | if (!PACKET_get_length_prefixed_2(&identities, &identity) | |
2c604cb9 | 1035 | || !PACKET_get_net_4(&identities, &ticket_agel)) { |
c48ffbcc | 1036 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1053a6e2 MC |
1037 | return 0; |
1038 | } | |
1039 | ||
f3d40db1 | 1040 | idlen = PACKET_remaining(&identity); |
3a7c56b2 | 1041 | if (s->psk_find_session_cb != NULL |
38b051a1 | 1042 | && !s->psk_find_session_cb(ssl, PACKET_data(&identity), idlen, |
011d768a | 1043 | &sess)) { |
c48ffbcc | 1044 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_EXTENSION); |
011d768a MC |
1045 | return 0; |
1046 | } | |
1047 | ||
c2b290c3 | 1048 | #ifndef OPENSSL_NO_PSK |
1287dabd | 1049 | if (sess == NULL |
f3d40db1 MC |
1050 | && s->psk_server_callback != NULL |
1051 | && idlen <= PSK_MAX_IDENTITY_LEN) { | |
1052 | char *pskid = NULL; | |
1053 | unsigned char pskdata[PSK_MAX_PSK_LEN]; | |
1054 | unsigned int pskdatalen; | |
1055 | ||
1056 | if (!PACKET_strndup(&identity, &pskid)) { | |
c48ffbcc | 1057 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
1058 | return 0; |
1059 | } | |
38b051a1 | 1060 | pskdatalen = s->psk_server_callback(ssl, pskid, pskdata, |
f3d40db1 MC |
1061 | sizeof(pskdata)); |
1062 | OPENSSL_free(pskid); | |
1063 | if (pskdatalen > PSK_MAX_PSK_LEN) { | |
c48ffbcc | 1064 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
1065 | return 0; |
1066 | } else if (pskdatalen > 0) { | |
1067 | const SSL_CIPHER *cipher; | |
1068 | const unsigned char tls13_aes128gcmsha256_id[] = { 0x13, 0x01 }; | |
1069 | ||
1070 | /* | |
1071 | * We found a PSK using an old style callback. We don't know | |
1072 | * the digest so we default to SHA256 as per the TLSv1.3 spec | |
1073 | */ | |
38b051a1 | 1074 | cipher = SSL_CIPHER_find(ssl, tls13_aes128gcmsha256_id); |
f3d40db1 MC |
1075 | if (cipher == NULL) { |
1076 | OPENSSL_cleanse(pskdata, pskdatalen); | |
c48ffbcc | 1077 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
1078 | return 0; |
1079 | } | |
1080 | ||
1081 | sess = SSL_SESSION_new(); | |
1082 | if (sess == NULL | |
1083 | || !SSL_SESSION_set1_master_key(sess, pskdata, | |
1084 | pskdatalen) | |
1085 | || !SSL_SESSION_set_cipher(sess, cipher) | |
1086 | || !SSL_SESSION_set_protocol_version(sess, | |
1087 | TLS1_3_VERSION)) { | |
1088 | OPENSSL_cleanse(pskdata, pskdatalen); | |
c48ffbcc | 1089 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
1090 | goto err; |
1091 | } | |
1092 | OPENSSL_cleanse(pskdata, pskdatalen); | |
1093 | } | |
1094 | } | |
c2b290c3 | 1095 | #endif /* OPENSSL_NO_PSK */ |
f3d40db1 | 1096 | |
011d768a MC |
1097 | if (sess != NULL) { |
1098 | /* We found a PSK */ | |
3a7c56b2 | 1099 | SSL_SESSION *sesstmp = ssl_session_dup(sess, 0); |
1b8bacff | 1100 | |
3a7c56b2 | 1101 | if (sesstmp == NULL) { |
c48ffbcc | 1102 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
3a7c56b2 MC |
1103 | return 0; |
1104 | } | |
1105 | SSL_SESSION_free(sess); | |
1106 | sess = sesstmp; | |
1107 | ||
1108 | /* | |
1109 | * We've just been told to use this session for this context so | |
1110 | * make sure the sid_ctx matches up. | |
1111 | */ | |
1112 | memcpy(sess->sid_ctx, s->sid_ctx, s->sid_ctx_length); | |
1113 | sess->sid_ctx_length = s->sid_ctx_length; | |
1114 | ext = 1; | |
630369d9 MC |
1115 | if (id == 0) |
1116 | s->ext.early_data_ok = 1; | |
51256b34 | 1117 | s->ext.ticket_expected = 1; |
3a7c56b2 | 1118 | } else { |
f0131dc0 | 1119 | OSSL_TIME t, age, expire; |
61fb5923 MC |
1120 | int ret; |
1121 | ||
e880d4e5 MC |
1122 | /* |
1123 | * If we are using anti-replay protection then we behave as if | |
1124 | * SSL_OP_NO_TICKET is set - we are caching tickets anyway so there | |
1125 | * is no point in using full stateless tickets. | |
1126 | */ | |
1127 | if ((s->options & SSL_OP_NO_TICKET) != 0 | |
5d263fb7 MC |
1128 | || (s->max_early_data > 0 |
1129 | && (s->options & SSL_OP_NO_ANTI_REPLAY) == 0)) | |
6cc0b3c2 MC |
1130 | ret = tls_get_stateful_ticket(s, &identity, &sess); |
1131 | else | |
1132 | ret = tls_decrypt_ticket(s, PACKET_data(&identity), | |
1133 | PACKET_remaining(&identity), NULL, 0, | |
1134 | &sess); | |
61fb5923 MC |
1135 | |
1136 | if (ret == SSL_TICKET_EMPTY) { | |
c48ffbcc | 1137 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
61fb5923 MC |
1138 | return 0; |
1139 | } | |
3a7c56b2 | 1140 | |
df0fed9a TS |
1141 | if (ret == SSL_TICKET_FATAL_ERR_MALLOC |
1142 | || ret == SSL_TICKET_FATAL_ERR_OTHER) { | |
c48ffbcc | 1143 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
3a7c56b2 MC |
1144 | return 0; |
1145 | } | |
61fb5923 | 1146 | if (ret == SSL_TICKET_NONE || ret == SSL_TICKET_NO_DECRYPT) |
3a7c56b2 MC |
1147 | continue; |
1148 | ||
66d7de16 MC |
1149 | /* Check for replay */ |
1150 | if (s->max_early_data > 0 | |
5d263fb7 | 1151 | && (s->options & SSL_OP_NO_ANTI_REPLAY) == 0 |
66d7de16 MC |
1152 | && !SSL_CTX_remove_session(s->session_ctx, sess)) { |
1153 | SSL_SESSION_free(sess); | |
1154 | sess = NULL; | |
1155 | continue; | |
1156 | } | |
1157 | ||
0513a383 MC |
1158 | age = ossl_time_subtract(ossl_ms2time(ticket_agel), |
1159 | ossl_ms2time(sess->ext.tick_age_add)); | |
f0131dc0 | 1160 | t = ossl_time_subtract(ossl_time_now(), sess->time); |
3a7c56b2 MC |
1161 | |
1162 | /* | |
0513a383 MC |
1163 | * Although internally we use OSS_TIME which has ns granularity, |
1164 | * when SSL_SESSION structures are serialised/deserialised we use | |
1165 | * second granularity for the sess->time field. Therefore it could | |
1166 | * appear that the client's ticket age is longer than ours (our | |
1167 | * ticket age calculation should always be slightly longer than the | |
1168 | * client's due to the network latency). Therefore we add 1000ms to | |
1169 | * our age calculation to adjust for rounding errors. | |
3a7c56b2 | 1170 | */ |
f0131dc0 P |
1171 | expire = ossl_time_add(t, ossl_ms2time(1000)); |
1172 | ||
630369d9 | 1173 | if (id == 0 |
f0131dc0 P |
1174 | && ossl_time_compare(sess->timeout, t) >= 0 |
1175 | && ossl_time_compare(age, expire) <= 0 | |
1176 | && ossl_time_compare(ossl_time_add(age, TICKET_AGE_ALLOWANCE), | |
1177 | expire) >= 0) { | |
3a7c56b2 MC |
1178 | /* |
1179 | * Ticket age is within tolerance and not expired. We allow it | |
1180 | * for early data | |
1181 | */ | |
1182 | s->ext.early_data_ok = 1; | |
1183 | } | |
1053a6e2 | 1184 | } |
1053a6e2 | 1185 | |
38b051a1 | 1186 | md = ssl_md(sctx, sess->cipher->algorithm2); |
b740012f | 1187 | if (md == NULL) { |
1188 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
1189 | goto err; | |
1190 | } | |
c8f6c28a | 1191 | if (!EVP_MD_is_a(md, |
38b051a1 | 1192 | EVP_MD_get0_name(ssl_md(sctx, |
ed576acd | 1193 | s->s3.tmp.new_cipher->algorithm2)))) { |
0de6d66d | 1194 | /* The ciphersuite is not compatible with this session. */ |
1053a6e2 MC |
1195 | SSL_SESSION_free(sess); |
1196 | sess = NULL; | |
630369d9 | 1197 | s->ext.early_data_ok = 0; |
51256b34 | 1198 | s->ext.ticket_expected = 0; |
1053a6e2 MC |
1199 | continue; |
1200 | } | |
1053a6e2 MC |
1201 | break; |
1202 | } | |
1203 | ||
1204 | if (sess == NULL) | |
1205 | return 1; | |
1206 | ||
1207 | binderoffset = PACKET_data(pkt) - (const unsigned char *)s->init_buf->data; | |
ed576acd | 1208 | hashsize = EVP_MD_get_size(md); |
1053a6e2 MC |
1209 | |
1210 | if (!PACKET_get_length_prefixed_2(pkt, &binders)) { | |
c48ffbcc | 1211 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1053a6e2 MC |
1212 | goto err; |
1213 | } | |
1214 | ||
1215 | for (i = 0; i <= id; i++) { | |
1216 | if (!PACKET_get_length_prefixed_1(&binders, &binder)) { | |
c48ffbcc | 1217 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1053a6e2 MC |
1218 | goto err; |
1219 | } | |
1220 | } | |
1221 | ||
2894e9cb | 1222 | if (PACKET_remaining(&binder) != hashsize) { |
c48ffbcc | 1223 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
2894e9cb MC |
1224 | goto err; |
1225 | } | |
1226 | if (tls_psk_do_binder(s, md, (const unsigned char *)s->init_buf->data, | |
1227 | binderoffset, PACKET_data(&binder), NULL, sess, 0, | |
1228 | ext) != 1) { | |
635c8f77 | 1229 | /* SSLfatal() already called */ |
1053a6e2 MC |
1230 | goto err; |
1231 | } | |
1232 | ||
c96ce52c | 1233 | s->ext.tick_identity = id; |
2c604cb9 | 1234 | |
1053a6e2 MC |
1235 | SSL_SESSION_free(s->session); |
1236 | s->session = sess; | |
1053a6e2 MC |
1237 | return 1; |
1238 | err: | |
312e9387 | 1239 | SSL_SESSION_free(sess); |
1053a6e2 MC |
1240 | return 0; |
1241 | } | |
1242 | ||
38b051a1 | 1243 | int tls_parse_ctos_post_handshake_auth(SSL_CONNECTION *s, PACKET *pkt, |
a7e6a3d8 P |
1244 | ossl_unused unsigned int context, |
1245 | ossl_unused X509 *x, | |
1246 | ossl_unused size_t chainidx) | |
9d75dce3 TS |
1247 | { |
1248 | if (PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 1249 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
9d75dce3 TS |
1250 | SSL_R_POST_HANDSHAKE_AUTH_ENCODING_ERR); |
1251 | return 0; | |
1252 | } | |
1253 | ||
1254 | s->post_handshake_auth = SSL_PHA_EXT_RECEIVED; | |
1255 | ||
1256 | return 1; | |
1257 | } | |
1258 | ||
1266eefd MC |
1259 | /* |
1260 | * Add the server's renegotiation binding | |
1261 | */ | |
38b051a1 | 1262 | EXT_RETURN tls_construct_stoc_renegotiate(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1263 | unsigned int context, X509 *x, |
f63a17d6 | 1264 | size_t chainidx) |
7da160b0 | 1265 | { |
555cbb32 | 1266 | if (!s->s3.send_connection_binding) |
b186a592 | 1267 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 1268 | |
db0f35dd | 1269 | /* Still add this even if SSL_OP_NO_RENEGOTIATION is set */ |
7da160b0 MC |
1270 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_renegotiate) |
1271 | || !WPACKET_start_sub_packet_u16(pkt) | |
1272 | || !WPACKET_start_sub_packet_u8(pkt) | |
555cbb32 TS |
1273 | || !WPACKET_memcpy(pkt, s->s3.previous_client_finished, |
1274 | s->s3.previous_client_finished_len) | |
1275 | || !WPACKET_memcpy(pkt, s->s3.previous_server_finished, | |
1276 | s->s3.previous_server_finished_len) | |
7da160b0 MC |
1277 | || !WPACKET_close(pkt) |
1278 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1279 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1280 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1281 | } |
1282 | ||
b186a592 | 1283 | return EXT_RETURN_SENT; |
7da160b0 MC |
1284 | } |
1285 | ||
38b051a1 | 1286 | EXT_RETURN tls_construct_stoc_server_name(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1287 | unsigned int context, X509 *x, |
f63a17d6 | 1288 | size_t chainidx) |
7da160b0 | 1289 | { |
7955c1f1 MC |
1290 | if (s->servername_done != 1) |
1291 | return EXT_RETURN_NOT_SENT; | |
1292 | ||
1293 | /* | |
1294 | * Prior to TLSv1.3 we ignore any SNI in the current handshake if resuming. | |
1295 | * We just use the servername from the initial handshake. | |
1296 | */ | |
38b051a1 | 1297 | if (s->hit && !SSL_CONNECTION_IS_TLS13(s)) |
b186a592 | 1298 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1299 | |
1300 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_server_name) | |
1301 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
c48ffbcc | 1302 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1303 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1304 | } |
1305 | ||
b186a592 | 1306 | return EXT_RETURN_SENT; |
7da160b0 MC |
1307 | } |
1308 | ||
cf72c757 | 1309 | /* Add/include the server's max fragment len extension into ServerHello */ |
38b051a1 | 1310 | EXT_RETURN tls_construct_stoc_maxfragmentlen(SSL_CONNECTION *s, WPACKET *pkt, |
cf72c757 | 1311 | unsigned int context, X509 *x, |
f63a17d6 | 1312 | size_t chainidx) |
cf72c757 F |
1313 | { |
1314 | if (!USE_MAX_FRAGMENT_LENGTH_EXT(s->session)) | |
1315 | return EXT_RETURN_NOT_SENT; | |
1316 | ||
1317 | /*- | |
1318 | * 4 bytes for this extension type and extension length | |
1319 | * 1 byte for the Max Fragment Length code value. | |
1320 | */ | |
1321 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_max_fragment_length) | |
1322 | || !WPACKET_start_sub_packet_u16(pkt) | |
1323 | || !WPACKET_put_bytes_u8(pkt, s->session->ext.max_fragment_len_mode) | |
1324 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1325 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
cf72c757 F |
1326 | return EXT_RETURN_FAIL; |
1327 | } | |
1328 | ||
1329 | return EXT_RETURN_SENT; | |
1330 | } | |
1331 | ||
38b051a1 | 1332 | EXT_RETURN tls_construct_stoc_ec_pt_formats(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1333 | unsigned int context, X509 *x, |
f63a17d6 | 1334 | size_t chainidx) |
7da160b0 | 1335 | { |
555cbb32 TS |
1336 | unsigned long alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
1337 | unsigned long alg_a = s->s3.tmp.new_cipher->algorithm_auth; | |
89247375 | 1338 | int using_ecc = ((alg_k & SSL_kECDHE) || (alg_a & SSL_aECDSA)) |
cd0fb43c | 1339 | && (s->ext.peer_ecpointformats != NULL); |
7da160b0 MC |
1340 | const unsigned char *plist; |
1341 | size_t plistlen; | |
1342 | ||
1343 | if (!using_ecc) | |
b186a592 | 1344 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1345 | |
1346 | tls1_get_formatlist(s, &plist, &plistlen); | |
7da160b0 MC |
1347 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_ec_point_formats) |
1348 | || !WPACKET_start_sub_packet_u16(pkt) | |
1349 | || !WPACKET_sub_memcpy_u8(pkt, plist, plistlen) | |
1350 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1351 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1352 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1353 | } |
1354 | ||
b186a592 | 1355 | return EXT_RETURN_SENT; |
7da160b0 | 1356 | } |
7da160b0 | 1357 | |
38b051a1 | 1358 | EXT_RETURN tls_construct_stoc_supported_groups(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1359 | unsigned int context, X509 *x, |
f63a17d6 | 1360 | size_t chainidx) |
6af87546 | 1361 | { |
9e84a42d | 1362 | const uint16_t *groups; |
6af87546 | 1363 | size_t numgroups, i, first = 1; |
9d2d857f | 1364 | int version; |
6af87546 | 1365 | |
555cbb32 TS |
1366 | /* s->s3.group_id is non zero if we accepted a key_share */ |
1367 | if (s->s3.group_id == 0) | |
b186a592 | 1368 | return EXT_RETURN_NOT_SENT; |
6af87546 MC |
1369 | |
1370 | /* Get our list of supported groups */ | |
ff6d20a6 | 1371 | tls1_get_supported_groups(s, &groups, &numgroups); |
34e5292c | 1372 | if (numgroups == 0) { |
c48ffbcc | 1373 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1374 | return EXT_RETURN_FAIL; |
6af87546 MC |
1375 | } |
1376 | ||
1377 | /* Copy group ID if supported */ | |
38b051a1 | 1378 | version = SSL_version(SSL_CONNECTION_GET_SSL(s)); |
9e84a42d DSH |
1379 | for (i = 0; i < numgroups; i++) { |
1380 | uint16_t group = groups[i]; | |
1381 | ||
8b1db5d3 | 1382 | if (tls_valid_group(s, group, version, version, 0, NULL) |
dbc6268f | 1383 | && tls_group_allowed(s, group, SSL_SECOP_CURVE_SUPPORTED)) { |
6af87546 MC |
1384 | if (first) { |
1385 | /* | |
1386 | * Check if the client is already using our preferred group. If | |
1387 | * so we don't need to add this extension | |
1388 | */ | |
555cbb32 | 1389 | if (s->s3.group_id == group) |
b186a592 | 1390 | return EXT_RETURN_NOT_SENT; |
6af87546 MC |
1391 | |
1392 | /* Add extension header */ | |
1393 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_groups) | |
1394 | /* Sub-packet for supported_groups extension */ | |
1395 | || !WPACKET_start_sub_packet_u16(pkt) | |
1396 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
c48ffbcc | 1397 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1398 | return EXT_RETURN_FAIL; |
6af87546 MC |
1399 | } |
1400 | ||
1401 | first = 0; | |
1402 | } | |
9e84a42d | 1403 | if (!WPACKET_put_bytes_u16(pkt, group)) { |
c48ffbcc | 1404 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1405 | return EXT_RETURN_FAIL; |
6af87546 MC |
1406 | } |
1407 | } | |
1408 | } | |
1409 | ||
1410 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
c48ffbcc | 1411 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1412 | return EXT_RETURN_FAIL; |
6af87546 MC |
1413 | } |
1414 | ||
b186a592 | 1415 | return EXT_RETURN_SENT; |
6af87546 MC |
1416 | } |
1417 | ||
38b051a1 | 1418 | EXT_RETURN tls_construct_stoc_session_ticket(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1419 | unsigned int context, X509 *x, |
f63a17d6 | 1420 | size_t chainidx) |
7da160b0 | 1421 | { |
aff8c126 RS |
1422 | if (!s->ext.ticket_expected || !tls_use_ticket(s)) { |
1423 | s->ext.ticket_expected = 0; | |
b186a592 | 1424 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1425 | } |
1426 | ||
1427 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket) | |
1428 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
c48ffbcc | 1429 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1430 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1431 | } |
1432 | ||
b186a592 | 1433 | return EXT_RETURN_SENT; |
7da160b0 MC |
1434 | } |
1435 | ||
ab83e314 | 1436 | #ifndef OPENSSL_NO_OCSP |
38b051a1 | 1437 | EXT_RETURN tls_construct_stoc_status_request(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1438 | unsigned int context, X509 *x, |
f63a17d6 | 1439 | size_t chainidx) |
7da160b0 | 1440 | { |
debb64a0 MC |
1441 | /* We don't currently support this extension inside a CertificateRequest */ |
1442 | if (context == SSL_EXT_TLS1_3_CERTIFICATE_REQUEST) | |
1443 | return EXT_RETURN_NOT_SENT; | |
1444 | ||
aff8c126 | 1445 | if (!s->ext.status_expected) |
b186a592 | 1446 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 1447 | |
38b051a1 | 1448 | if (SSL_CONNECTION_IS_TLS13(s) && chainidx != 0) |
b186a592 | 1449 | return EXT_RETURN_NOT_SENT; |
e96e0f8e | 1450 | |
7da160b0 | 1451 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request) |
f63e4288 | 1452 | || !WPACKET_start_sub_packet_u16(pkt)) { |
c48ffbcc | 1453 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1454 | return EXT_RETURN_FAIL; |
f63e4288 MC |
1455 | } |
1456 | ||
1457 | /* | |
1458 | * In TLSv1.3 we include the certificate status itself. In <= TLSv1.2 we | |
1459 | * send back an empty extension, with the certificate status appearing as a | |
1460 | * separate message | |
1461 | */ | |
38b051a1 | 1462 | if (SSL_CONNECTION_IS_TLS13(s) && !tls_construct_cert_status_body(s, pkt)) { |
3ec8d113 | 1463 | /* SSLfatal() already called */ |
56d36288 | 1464 | return EXT_RETURN_FAIL; |
3ec8d113 MC |
1465 | } |
1466 | if (!WPACKET_close(pkt)) { | |
c48ffbcc | 1467 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1468 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1469 | } |
1470 | ||
b186a592 | 1471 | return EXT_RETURN_SENT; |
7da160b0 | 1472 | } |
ab83e314 | 1473 | #endif |
7da160b0 | 1474 | |
7da160b0 | 1475 | #ifndef OPENSSL_NO_NEXTPROTONEG |
38b051a1 | 1476 | EXT_RETURN tls_construct_stoc_next_proto_neg(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1477 | unsigned int context, X509 *x, |
f63a17d6 | 1478 | size_t chainidx) |
7da160b0 MC |
1479 | { |
1480 | const unsigned char *npa; | |
1481 | unsigned int npalen; | |
1482 | int ret; | |
555cbb32 | 1483 | int npn_seen = s->s3.npn_seen; |
38b051a1 | 1484 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
7da160b0 | 1485 | |
555cbb32 | 1486 | s->s3.npn_seen = 0; |
38b051a1 | 1487 | if (!npn_seen || sctx->ext.npn_advertised_cb == NULL) |
b186a592 | 1488 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 1489 | |
38b051a1 TM |
1490 | ret = sctx->ext.npn_advertised_cb(SSL_CONNECTION_GET_SSL(s), &npa, &npalen, |
1491 | sctx->ext.npn_advertised_cb_arg); | |
7da160b0 MC |
1492 | if (ret == SSL_TLSEXT_ERR_OK) { |
1493 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_next_proto_neg) | |
1494 | || !WPACKET_sub_memcpy_u16(pkt, npa, npalen)) { | |
c48ffbcc | 1495 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1496 | return EXT_RETURN_FAIL; |
7da160b0 | 1497 | } |
555cbb32 | 1498 | s->s3.npn_seen = 1; |
7da160b0 MC |
1499 | } |
1500 | ||
b186a592 | 1501 | return EXT_RETURN_SENT; |
7da160b0 MC |
1502 | } |
1503 | #endif | |
1504 | ||
38b051a1 | 1505 | EXT_RETURN tls_construct_stoc_alpn(SSL_CONNECTION *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 1506 | X509 *x, size_t chainidx) |
7da160b0 | 1507 | { |
555cbb32 | 1508 | if (s->s3.alpn_selected == NULL) |
b186a592 | 1509 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1510 | |
1511 | if (!WPACKET_put_bytes_u16(pkt, | |
1512 | TLSEXT_TYPE_application_layer_protocol_negotiation) | |
1513 | || !WPACKET_start_sub_packet_u16(pkt) | |
1514 | || !WPACKET_start_sub_packet_u16(pkt) | |
555cbb32 TS |
1515 | || !WPACKET_sub_memcpy_u8(pkt, s->s3.alpn_selected, |
1516 | s->s3.alpn_selected_len) | |
7da160b0 MC |
1517 | || !WPACKET_close(pkt) |
1518 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1519 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1520 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1521 | } |
1522 | ||
b186a592 | 1523 | return EXT_RETURN_SENT; |
7da160b0 MC |
1524 | } |
1525 | ||
1526 | #ifndef OPENSSL_NO_SRTP | |
38b051a1 | 1527 | EXT_RETURN tls_construct_stoc_use_srtp(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1528 | unsigned int context, X509 *x, |
f63a17d6 | 1529 | size_t chainidx) |
7da160b0 MC |
1530 | { |
1531 | if (s->srtp_profile == NULL) | |
b186a592 | 1532 | return EXT_RETURN_NOT_SENT; |
a1448c26 | 1533 | |
7da160b0 MC |
1534 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp) |
1535 | || !WPACKET_start_sub_packet_u16(pkt) | |
1536 | || !WPACKET_put_bytes_u16(pkt, 2) | |
1537 | || !WPACKET_put_bytes_u16(pkt, s->srtp_profile->id) | |
1538 | || !WPACKET_put_bytes_u8(pkt, 0) | |
1539 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1540 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1541 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1542 | } |
1543 | ||
b186a592 | 1544 | return EXT_RETURN_SENT; |
7da160b0 MC |
1545 | } |
1546 | #endif | |
1547 | ||
38b051a1 TM |
1548 | EXT_RETURN tls_construct_stoc_etm(SSL_CONNECTION *s, WPACKET *pkt, |
1549 | unsigned int context, | |
f63a17d6 | 1550 | X509 *x, size_t chainidx) |
7da160b0 | 1551 | { |
28a31a0a | 1552 | if (!s->ext.use_etm) |
b186a592 | 1553 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1554 | |
1555 | /* | |
1556 | * Don't use encrypt_then_mac if AEAD or RC4 might want to disable | |
1557 | * for other cases too. | |
1558 | */ | |
555cbb32 TS |
1559 | if (s->s3.tmp.new_cipher->algorithm_mac == SSL_AEAD |
1560 | || s->s3.tmp.new_cipher->algorithm_enc == SSL_RC4 | |
1561 | || s->s3.tmp.new_cipher->algorithm_enc == SSL_eGOST2814789CNT | |
5a5530a2 DB |
1562 | || s->s3.tmp.new_cipher->algorithm_enc == SSL_eGOST2814789CNT12 |
1563 | || s->s3.tmp.new_cipher->algorithm_enc == SSL_MAGMA | |
1564 | || s->s3.tmp.new_cipher->algorithm_enc == SSL_KUZNYECHIK) { | |
28a31a0a | 1565 | s->ext.use_etm = 0; |
b186a592 | 1566 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1567 | } |
1568 | ||
1569 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac) | |
1570 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
c48ffbcc | 1571 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1572 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1573 | } |
1574 | ||
b186a592 | 1575 | return EXT_RETURN_SENT; |
7da160b0 MC |
1576 | } |
1577 | ||
38b051a1 TM |
1578 | EXT_RETURN tls_construct_stoc_ems(SSL_CONNECTION *s, WPACKET *pkt, |
1579 | unsigned int context, | |
f63a17d6 | 1580 | X509 *x, size_t chainidx) |
7da160b0 | 1581 | { |
555cbb32 | 1582 | if ((s->s3.flags & TLS1_FLAGS_RECEIVED_EXTMS) == 0) |
b186a592 | 1583 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1584 | |
1585 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret) | |
1586 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
c48ffbcc | 1587 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1588 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1589 | } |
1590 | ||
b186a592 | 1591 | return EXT_RETURN_SENT; |
7da160b0 MC |
1592 | } |
1593 | ||
38b051a1 | 1594 | EXT_RETURN tls_construct_stoc_supported_versions(SSL_CONNECTION *s, WPACKET *pkt, |
88050dd1 MC |
1595 | unsigned int context, X509 *x, |
1596 | size_t chainidx) | |
1597 | { | |
38b051a1 | 1598 | if (!ossl_assert(SSL_CONNECTION_IS_TLS13(s))) { |
c48ffbcc | 1599 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
27e462f1 MC |
1600 | return EXT_RETURN_FAIL; |
1601 | } | |
88050dd1 MC |
1602 | |
1603 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_versions) | |
1604 | || !WPACKET_start_sub_packet_u16(pkt) | |
35e742ec | 1605 | || !WPACKET_put_bytes_u16(pkt, s->version) |
88050dd1 | 1606 | || !WPACKET_close(pkt)) { |
c48ffbcc | 1607 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
88050dd1 MC |
1608 | return EXT_RETURN_FAIL; |
1609 | } | |
1610 | ||
1611 | return EXT_RETURN_SENT; | |
1612 | } | |
1613 | ||
38b051a1 | 1614 | EXT_RETURN tls_construct_stoc_key_share(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1615 | unsigned int context, X509 *x, |
f63a17d6 | 1616 | size_t chainidx) |
7da160b0 | 1617 | { |
3cf96e88 | 1618 | #ifndef OPENSSL_NO_TLS1_3 |
7da160b0 MC |
1619 | unsigned char *encodedPoint; |
1620 | size_t encoded_pt_len = 0; | |
555cbb32 | 1621 | EVP_PKEY *ckey = s->s3.peer_tmp, *skey = NULL; |
8b17fbaf | 1622 | const TLS_GROUP_INFO *ginf = NULL; |
7da160b0 | 1623 | |
dd77962e MC |
1624 | if (s->hello_retry_request == SSL_HRR_PENDING) { |
1625 | if (ckey != NULL) { | |
1626 | /* Original key_share was acceptable so don't ask for another one */ | |
1627 | return EXT_RETURN_NOT_SENT; | |
1628 | } | |
1629 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
1630 | || !WPACKET_start_sub_packet_u16(pkt) | |
16f0e91c | 1631 | || !WPACKET_put_bytes_u16(pkt, s->s3.group_id) |
dd77962e | 1632 | || !WPACKET_close(pkt)) { |
c48ffbcc | 1633 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
dd77962e | 1634 | return EXT_RETURN_FAIL; |
7d061fce MC |
1635 | } |
1636 | ||
dd77962e MC |
1637 | return EXT_RETURN_SENT; |
1638 | } | |
1639 | ||
1640 | if (ckey == NULL) { | |
1641 | /* No key_share received from client - must be resuming */ | |
0247086d | 1642 | if (!s->hit || !tls13_generate_handshake_secret(s, NULL, 0)) { |
c48ffbcc | 1643 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1644 | return EXT_RETURN_FAIL; |
0247086d | 1645 | } |
b186a592 | 1646 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 1647 | } |
b8590b2f MM |
1648 | if (s->hit) { |
1649 | /* PSK ('hit') */ | |
1650 | ||
e776858b | 1651 | /* |
b8590b2f MM |
1652 | * If we're doing PSK ('hit') but the client doesn't support psk-dhe, |
1653 | * we don't need to send a key share. | |
e776858b | 1654 | */ |
b8590b2f MM |
1655 | if ((s->ext.psk_kex_mode & TLSEXT_KEX_MODE_FLAG_KE_DHE) == 0) |
1656 | return EXT_RETURN_NOT_SENT; | |
1657 | ||
1658 | /* | |
1659 | * If both, psk_ke and psk_dh_ke are available, we do psk_dh_ke and | |
1660 | * send a key share by default, but not if the server is explicitly | |
1661 | * configured to prefer psk_ke. | |
1662 | */ | |
1663 | if (((s->ext.psk_kex_mode & TLSEXT_KEX_MODE_FLAG_KE) != 0) | |
1664 | && ((s->options & SSL_OP_PREFER_NO_DHE_KEX) != 0)) { | |
1665 | return EXT_RETURN_NOT_SENT; | |
1666 | } | |
e776858b | 1667 | } |
7da160b0 MC |
1668 | |
1669 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
1670 | || !WPACKET_start_sub_packet_u16(pkt) | |
555cbb32 | 1671 | || !WPACKET_put_bytes_u16(pkt, s->s3.group_id)) { |
c48ffbcc | 1672 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1673 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1674 | } |
1675 | ||
38b051a1 TM |
1676 | if ((ginf = tls1_group_id_lookup(SSL_CONNECTION_GET_CTX(s), |
1677 | s->s3.group_id)) == NULL) { | |
c48ffbcc | 1678 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1679 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1680 | } |
1681 | ||
8b17fbaf NT |
1682 | if (!ginf->is_kem) { |
1683 | /* Regular KEX */ | |
1684 | skey = ssl_generate_pkey(s, ckey); | |
1685 | if (skey == NULL) { | |
e077455e | 1686 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_SSL_LIB); |
8b17fbaf NT |
1687 | return EXT_RETURN_FAIL; |
1688 | } | |
7da160b0 | 1689 | |
8b17fbaf | 1690 | /* Generate encoding of server key */ |
5ac8fb58 | 1691 | encoded_pt_len = EVP_PKEY_get1_encoded_public_key(skey, &encodedPoint); |
8b17fbaf | 1692 | if (encoded_pt_len == 0) { |
c48ffbcc | 1693 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EC_LIB); |
8b17fbaf NT |
1694 | EVP_PKEY_free(skey); |
1695 | return EXT_RETURN_FAIL; | |
1696 | } | |
1697 | ||
1698 | if (!WPACKET_sub_memcpy_u16(pkt, encodedPoint, encoded_pt_len) | |
1699 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1700 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
8b17fbaf NT |
1701 | EVP_PKEY_free(skey); |
1702 | OPENSSL_free(encodedPoint); | |
1703 | return EXT_RETURN_FAIL; | |
1704 | } | |
7da160b0 | 1705 | OPENSSL_free(encodedPoint); |
7da160b0 | 1706 | |
8b17fbaf NT |
1707 | /* |
1708 | * This causes the crypto state to be updated based on the derived keys | |
1709 | */ | |
1710 | s->s3.tmp.pkey = skey; | |
1711 | if (ssl_derive(s, skey, ckey, 1) == 0) { | |
1712 | /* SSLfatal() already called */ | |
1713 | return EXT_RETURN_FAIL; | |
1714 | } | |
1715 | } else { | |
1716 | /* KEM mode */ | |
1717 | unsigned char *ct = NULL; | |
1718 | size_t ctlen = 0; | |
1719 | ||
1720 | /* | |
1721 | * This does not update the crypto state. | |
1722 | * | |
1723 | * The generated pms is stored in `s->s3.tmp.pms` to be later used via | |
1724 | * ssl_gensecret(). | |
1725 | */ | |
1726 | if (ssl_encapsulate(s, ckey, &ct, &ctlen, 0) == 0) { | |
1727 | /* SSLfatal() already called */ | |
1728 | return EXT_RETURN_FAIL; | |
1729 | } | |
1730 | ||
1731 | if (ctlen == 0) { | |
c48ffbcc | 1732 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
8b17fbaf NT |
1733 | OPENSSL_free(ct); |
1734 | return EXT_RETURN_FAIL; | |
1735 | } | |
1736 | ||
1737 | if (!WPACKET_sub_memcpy_u16(pkt, ct, ctlen) | |
1738 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1739 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
8b17fbaf NT |
1740 | OPENSSL_free(ct); |
1741 | return EXT_RETURN_FAIL; | |
1742 | } | |
1743 | OPENSSL_free(ct); | |
1744 | ||
1745 | /* | |
1746 | * This causes the crypto state to be updated based on the generated pms | |
1747 | */ | |
1748 | if (ssl_gensecret(s, s->s3.tmp.pms, s->s3.tmp.pmslen) == 0) { | |
1749 | /* SSLfatal() already called */ | |
1750 | return EXT_RETURN_FAIL; | |
1751 | } | |
7da160b0 | 1752 | } |
aa6bd216 | 1753 | s->s3.did_kex = 1; |
b186a592 | 1754 | return EXT_RETURN_SENT; |
1aac20f5 MC |
1755 | #else |
1756 | return EXT_RETURN_FAIL; | |
1757 | #endif | |
7da160b0 MC |
1758 | } |
1759 | ||
38b051a1 TM |
1760 | EXT_RETURN tls_construct_stoc_cookie(SSL_CONNECTION *s, WPACKET *pkt, |
1761 | unsigned int context, | |
43054d3d MC |
1762 | X509 *x, size_t chainidx) |
1763 | { | |
1aac20f5 | 1764 | #ifndef OPENSSL_NO_TLS1_3 |
43054d3d MC |
1765 | unsigned char *hashval1, *hashval2, *appcookie1, *appcookie2, *cookie; |
1766 | unsigned char *hmac, *hmac2; | |
3fa2812f | 1767 | size_t startlen, ciphlen, totcookielen, hashlen, hmaclen, appcookielen; |
43054d3d MC |
1768 | EVP_MD_CTX *hctx; |
1769 | EVP_PKEY *pkey; | |
1770 | int ret = EXT_RETURN_FAIL; | |
38b051a1 TM |
1771 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
1772 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); | |
43054d3d | 1773 | |
555cbb32 | 1774 | if ((s->s3.flags & TLS1_FLAGS_STATELESS) == 0) |
43054d3d MC |
1775 | return EXT_RETURN_NOT_SENT; |
1776 | ||
38b051a1 | 1777 | if (sctx->gen_stateless_cookie_cb == NULL) { |
c48ffbcc | 1778 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_NO_COOKIE_CALLBACK_SET); |
e440f513 MC |
1779 | return EXT_RETURN_FAIL; |
1780 | } | |
1781 | ||
43054d3d MC |
1782 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_cookie) |
1783 | || !WPACKET_start_sub_packet_u16(pkt) | |
1784 | || !WPACKET_start_sub_packet_u16(pkt) | |
1785 | || !WPACKET_get_total_written(pkt, &startlen) | |
1786 | || !WPACKET_reserve_bytes(pkt, MAX_COOKIE_SIZE, &cookie) | |
1787 | || !WPACKET_put_bytes_u16(pkt, COOKIE_STATE_FORMAT_VERSION) | |
1788 | || !WPACKET_put_bytes_u16(pkt, TLS1_3_VERSION) | |
555cbb32 | 1789 | || !WPACKET_put_bytes_u16(pkt, s->s3.group_id) |
38b051a1 TM |
1790 | || !ssl->method->put_cipher_by_char(s->s3.tmp.new_cipher, pkt, |
1791 | &ciphlen) | |
43054d3d | 1792 | /* Is there a key_share extension present in this HRR? */ |
555cbb32 | 1793 | || !WPACKET_put_bytes_u8(pkt, s->s3.peer_tmp == NULL) |
e8a557dc | 1794 | || !WPACKET_put_bytes_u64(pkt, time(NULL)) |
43054d3d MC |
1795 | || !WPACKET_start_sub_packet_u16(pkt) |
1796 | || !WPACKET_reserve_bytes(pkt, EVP_MAX_MD_SIZE, &hashval1)) { | |
c48ffbcc | 1797 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1798 | return EXT_RETURN_FAIL; |
1799 | } | |
1800 | ||
1801 | /* | |
1802 | * Get the hash of the initial ClientHello. ssl_handshake_hash() operates | |
1803 | * on raw buffers, so we first reserve sufficient bytes (above) and then | |
1804 | * subsequently allocate them (below) | |
1805 | */ | |
1806 | if (!ssl3_digest_cached_records(s, 0) | |
1807 | || !ssl_handshake_hash(s, hashval1, EVP_MAX_MD_SIZE, &hashlen)) { | |
1808 | /* SSLfatal() already called */ | |
1809 | return EXT_RETURN_FAIL; | |
1810 | } | |
1811 | ||
1812 | if (!WPACKET_allocate_bytes(pkt, hashlen, &hashval2) | |
1813 | || !ossl_assert(hashval1 == hashval2) | |
1814 | || !WPACKET_close(pkt) | |
1815 | || !WPACKET_start_sub_packet_u8(pkt) | |
1816 | || !WPACKET_reserve_bytes(pkt, SSL_COOKIE_LENGTH, &appcookie1)) { | |
c48ffbcc | 1817 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1818 | return EXT_RETURN_FAIL; |
1819 | } | |
1820 | ||
1821 | /* Generate the application cookie */ | |
38b051a1 TM |
1822 | if (sctx->gen_stateless_cookie_cb(ssl, appcookie1, |
1823 | &appcookielen) == 0) { | |
c48ffbcc | 1824 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_COOKIE_GEN_CALLBACK_FAILURE); |
43054d3d MC |
1825 | return EXT_RETURN_FAIL; |
1826 | } | |
1827 | ||
1828 | if (!WPACKET_allocate_bytes(pkt, appcookielen, &appcookie2) | |
1829 | || !ossl_assert(appcookie1 == appcookie2) | |
1830 | || !WPACKET_close(pkt) | |
1831 | || !WPACKET_get_total_written(pkt, &totcookielen) | |
1832 | || !WPACKET_reserve_bytes(pkt, SHA256_DIGEST_LENGTH, &hmac)) { | |
c48ffbcc | 1833 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1834 | return EXT_RETURN_FAIL; |
1835 | } | |
1836 | hmaclen = SHA256_DIGEST_LENGTH; | |
1837 | ||
1838 | totcookielen -= startlen; | |
1839 | if (!ossl_assert(totcookielen <= MAX_COOKIE_SIZE - SHA256_DIGEST_LENGTH)) { | |
c48ffbcc | 1840 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1841 | return EXT_RETURN_FAIL; |
1842 | } | |
1843 | ||
1844 | /* HMAC the cookie */ | |
1845 | hctx = EVP_MD_CTX_create(); | |
38b051a1 TM |
1846 | pkey = EVP_PKEY_new_raw_private_key_ex(sctx->libctx, "HMAC", |
1847 | sctx->propq, | |
d8652be0 MC |
1848 | s->session_ctx->ext.cookie_hmac_key, |
1849 | sizeof(s->session_ctx->ext.cookie_hmac_key)); | |
43054d3d | 1850 | if (hctx == NULL || pkey == NULL) { |
e077455e | 1851 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
43054d3d MC |
1852 | goto err; |
1853 | } | |
1854 | ||
38b051a1 TM |
1855 | if (EVP_DigestSignInit_ex(hctx, NULL, "SHA2-256", sctx->libctx, |
1856 | sctx->propq, pkey, NULL) <= 0 | |
43054d3d MC |
1857 | || EVP_DigestSign(hctx, hmac, &hmaclen, cookie, |
1858 | totcookielen) <= 0) { | |
c48ffbcc | 1859 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1860 | goto err; |
1861 | } | |
1862 | ||
1863 | if (!ossl_assert(totcookielen + hmaclen <= MAX_COOKIE_SIZE)) { | |
c48ffbcc | 1864 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1865 | goto err; |
1866 | } | |
1867 | ||
1868 | if (!WPACKET_allocate_bytes(pkt, hmaclen, &hmac2) | |
1869 | || !ossl_assert(hmac == hmac2) | |
1870 | || !ossl_assert(cookie == hmac - totcookielen) | |
1871 | || !WPACKET_close(pkt) | |
1872 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1873 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1874 | goto err; |
1875 | } | |
1876 | ||
1877 | ret = EXT_RETURN_SENT; | |
1878 | ||
1879 | err: | |
1880 | EVP_MD_CTX_free(hctx); | |
1881 | EVP_PKEY_free(pkey); | |
1882 | return ret; | |
1aac20f5 MC |
1883 | #else |
1884 | return EXT_RETURN_FAIL; | |
1885 | #endif | |
43054d3d MC |
1886 | } |
1887 | ||
38b051a1 | 1888 | EXT_RETURN tls_construct_stoc_cryptopro_bug(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1889 | unsigned int context, X509 *x, |
f63a17d6 | 1890 | size_t chainidx) |
7da160b0 MC |
1891 | { |
1892 | const unsigned char cryptopro_ext[36] = { | |
1893 | 0xfd, 0xe8, /* 65000 */ | |
1894 | 0x00, 0x20, /* 32 bytes length */ | |
1895 | 0x30, 0x1e, 0x30, 0x08, 0x06, 0x06, 0x2a, 0x85, | |
1896 | 0x03, 0x02, 0x02, 0x09, 0x30, 0x08, 0x06, 0x06, | |
1897 | 0x2a, 0x85, 0x03, 0x02, 0x02, 0x16, 0x30, 0x08, | |
1898 | 0x06, 0x06, 0x2a, 0x85, 0x03, 0x02, 0x02, 0x17 | |
1899 | }; | |
1900 | ||
555cbb32 TS |
1901 | if (((s->s3.tmp.new_cipher->id & 0xFFFF) != 0x80 |
1902 | && (s->s3.tmp.new_cipher->id & 0xFFFF) != 0x81) | |
38b051a1 TM |
1903 | || (SSL_get_options(SSL_CONNECTION_GET_SSL(s)) |
1904 | & SSL_OP_CRYPTOPRO_TLSEXT_BUG) == 0) | |
b186a592 | 1905 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1906 | |
1907 | if (!WPACKET_memcpy(pkt, cryptopro_ext, sizeof(cryptopro_ext))) { | |
c48ffbcc | 1908 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1909 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1910 | } |
1911 | ||
b186a592 | 1912 | return EXT_RETURN_SENT; |
7da160b0 | 1913 | } |
0247086d | 1914 | |
38b051a1 | 1915 | EXT_RETURN tls_construct_stoc_early_data(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1916 | unsigned int context, X509 *x, |
f63a17d6 | 1917 | size_t chainidx) |
38df5a45 | 1918 | { |
fe874d27 | 1919 | if (context == SSL_EXT_TLS1_3_NEW_SESSION_TICKET) { |
6594189f | 1920 | if (s->max_early_data == 0) |
b186a592 | 1921 | return EXT_RETURN_NOT_SENT; |
6594189f MC |
1922 | |
1923 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) | |
1924 | || !WPACKET_start_sub_packet_u16(pkt) | |
1925 | || !WPACKET_put_bytes_u32(pkt, s->max_early_data) | |
1926 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1927 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1928 | return EXT_RETURN_FAIL; |
6594189f MC |
1929 | } |
1930 | ||
b186a592 | 1931 | return EXT_RETURN_SENT; |
6594189f MC |
1932 | } |
1933 | ||
38df5a45 | 1934 | if (s->ext.early_data != SSL_EARLY_DATA_ACCEPTED) |
b186a592 | 1935 | return EXT_RETURN_NOT_SENT; |
38df5a45 MC |
1936 | |
1937 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) | |
1938 | || !WPACKET_start_sub_packet_u16(pkt) | |
1939 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1940 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1941 | return EXT_RETURN_FAIL; |
38df5a45 MC |
1942 | } |
1943 | ||
b186a592 | 1944 | return EXT_RETURN_SENT; |
38df5a45 MC |
1945 | } |
1946 | ||
38b051a1 TM |
1947 | EXT_RETURN tls_construct_stoc_psk(SSL_CONNECTION *s, WPACKET *pkt, |
1948 | unsigned int context, | |
f63a17d6 | 1949 | X509 *x, size_t chainidx) |
0247086d MC |
1950 | { |
1951 | if (!s->hit) | |
b186a592 | 1952 | return EXT_RETURN_NOT_SENT; |
0247086d MC |
1953 | |
1954 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk) | |
1955 | || !WPACKET_start_sub_packet_u16(pkt) | |
c96ce52c | 1956 | || !WPACKET_put_bytes_u16(pkt, s->ext.tick_identity) |
0247086d | 1957 | || !WPACKET_close(pkt)) { |
c48ffbcc | 1958 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1959 | return EXT_RETURN_FAIL; |
0247086d MC |
1960 | } |
1961 | ||
b186a592 | 1962 | return EXT_RETURN_SENT; |
0247086d | 1963 | } |
3c95ef22 TS |
1964 | |
1965 | EXT_RETURN tls_construct_stoc_client_cert_type(SSL_CONNECTION *sc, WPACKET *pkt, | |
1966 | unsigned int context, | |
1967 | X509 *x, size_t chainidx) | |
1968 | { | |
1969 | if (sc->ext.client_cert_type_ctos == OSSL_CERT_TYPE_CTOS_ERROR | |
1970 | && (send_certificate_request(sc) | |
1971 | || sc->post_handshake_auth == SSL_PHA_EXT_RECEIVED)) { | |
1972 | /* Did not receive an acceptable cert type - and doing client auth */ | |
1973 | SSLfatal(sc, SSL_AD_UNSUPPORTED_CERTIFICATE, SSL_R_BAD_EXTENSION); | |
1974 | return EXT_RETURN_FAIL; | |
1975 | } | |
1976 | ||
1977 | if (sc->ext.client_cert_type == TLSEXT_cert_type_x509) { | |
1978 | sc->ext.client_cert_type_ctos = OSSL_CERT_TYPE_CTOS_NONE; | |
1979 | return EXT_RETURN_NOT_SENT; | |
1980 | } | |
1981 | ||
1982 | /* | |
1983 | * Note: only supposed to send this if we are going to do a cert request, | |
1984 | * but TLSv1.3 could do a PHA request if the client supports it | |
1985 | */ | |
1986 | if ((!send_certificate_request(sc) && sc->post_handshake_auth != SSL_PHA_EXT_RECEIVED) | |
1987 | || sc->ext.client_cert_type_ctos != OSSL_CERT_TYPE_CTOS_GOOD | |
1988 | || sc->client_cert_type == NULL) { | |
1989 | /* if we don't send it, reset to TLSEXT_cert_type_x509 */ | |
1990 | sc->ext.client_cert_type_ctos = OSSL_CERT_TYPE_CTOS_NONE; | |
1991 | sc->ext.client_cert_type = TLSEXT_cert_type_x509; | |
1992 | return EXT_RETURN_NOT_SENT; | |
1993 | } | |
1994 | ||
1995 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_client_cert_type) | |
1996 | || !WPACKET_start_sub_packet_u16(pkt) | |
1997 | || !WPACKET_put_bytes_u8(pkt, sc->ext.client_cert_type) | |
1998 | || !WPACKET_close(pkt)) { | |
1999 | SSLfatal(sc, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
2000 | return EXT_RETURN_FAIL; | |
2001 | } | |
2002 | return EXT_RETURN_SENT; | |
2003 | } | |
2004 | ||
2005 | /* One of |pref|, |other| is configured and the values are sanitized */ | |
2006 | static int reconcile_cert_type(const unsigned char *pref, size_t pref_len, | |
2007 | const unsigned char *other, size_t other_len, | |
2008 | uint8_t *chosen_cert_type) | |
2009 | { | |
2010 | size_t i; | |
2011 | ||
2012 | for (i = 0; i < pref_len; i++) { | |
2013 | if (memchr(other, pref[i], other_len) != NULL) { | |
2014 | *chosen_cert_type = pref[i]; | |
2015 | return OSSL_CERT_TYPE_CTOS_GOOD; | |
2016 | } | |
2017 | } | |
2018 | return OSSL_CERT_TYPE_CTOS_ERROR; | |
2019 | } | |
2020 | ||
2021 | int tls_parse_ctos_client_cert_type(SSL_CONNECTION *sc, PACKET *pkt, | |
2022 | unsigned int context, | |
2023 | X509 *x, size_t chainidx) | |
2024 | { | |
2025 | PACKET supported_cert_types; | |
2026 | const unsigned char *data; | |
2027 | size_t len; | |
2028 | ||
2029 | /* Ignore the extension */ | |
2030 | if (sc->client_cert_type == NULL) { | |
2031 | sc->ext.client_cert_type_ctos = OSSL_CERT_TYPE_CTOS_NONE; | |
2032 | sc->ext.client_cert_type = TLSEXT_cert_type_x509; | |
2033 | return 1; | |
2034 | } | |
2035 | ||
2036 | if (!PACKET_as_length_prefixed_1(pkt, &supported_cert_types)) { | |
2037 | sc->ext.client_cert_type_ctos = OSSL_CERT_TYPE_CTOS_ERROR; | |
2038 | SSLfatal(sc, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); | |
2039 | return 0; | |
2040 | } | |
2041 | if ((len = PACKET_remaining(&supported_cert_types)) == 0) { | |
2042 | sc->ext.client_cert_type_ctos = OSSL_CERT_TYPE_CTOS_ERROR; | |
2043 | SSLfatal(sc, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); | |
2044 | return 0; | |
2045 | } | |
2046 | if (!PACKET_get_bytes(&supported_cert_types, &data, len)) { | |
2047 | sc->ext.client_cert_type_ctos = OSSL_CERT_TYPE_CTOS_ERROR; | |
2048 | SSLfatal(sc, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); | |
2049 | return 0; | |
2050 | } | |
2051 | /* client_cert_type: client (peer) has priority */ | |
2052 | sc->ext.client_cert_type_ctos = reconcile_cert_type(data, len, | |
2053 | sc->client_cert_type, sc->client_cert_type_len, | |
2054 | &sc->ext.client_cert_type); | |
2055 | ||
2056 | /* Ignore the error until sending - so we can check cert auth*/ | |
2057 | return 1; | |
2058 | } | |
2059 | ||
2060 | EXT_RETURN tls_construct_stoc_server_cert_type(SSL_CONNECTION *sc, WPACKET *pkt, | |
2061 | unsigned int context, | |
2062 | X509 *x, size_t chainidx) | |
2063 | { | |
2064 | if (sc->ext.server_cert_type == TLSEXT_cert_type_x509) { | |
2065 | sc->ext.server_cert_type_ctos = OSSL_CERT_TYPE_CTOS_NONE; | |
2066 | return EXT_RETURN_NOT_SENT; | |
2067 | } | |
2068 | if (sc->ext.server_cert_type_ctos != OSSL_CERT_TYPE_CTOS_GOOD | |
2069 | || sc->server_cert_type == NULL) { | |
2070 | /* if we don't send it, reset to TLSEXT_cert_type_x509 */ | |
2071 | sc->ext.server_cert_type_ctos = OSSL_CERT_TYPE_CTOS_NONE; | |
2072 | sc->ext.server_cert_type = TLSEXT_cert_type_x509; | |
2073 | return EXT_RETURN_NOT_SENT; | |
2074 | } | |
2075 | ||
2076 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_server_cert_type) | |
2077 | || !WPACKET_start_sub_packet_u16(pkt) | |
2078 | || !WPACKET_put_bytes_u8(pkt, sc->ext.server_cert_type) | |
2079 | || !WPACKET_close(pkt)) { | |
2080 | SSLfatal(sc, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
2081 | return EXT_RETURN_FAIL; | |
2082 | } | |
2083 | return EXT_RETURN_SENT; | |
2084 | } | |
2085 | ||
2086 | int tls_parse_ctos_server_cert_type(SSL_CONNECTION *sc, PACKET *pkt, | |
2087 | unsigned int context, | |
2088 | X509 *x, size_t chainidx) | |
2089 | { | |
2090 | PACKET supported_cert_types; | |
2091 | const unsigned char *data; | |
2092 | size_t len; | |
2093 | ||
2094 | /* Ignore the extension */ | |
2095 | if (sc->server_cert_type == NULL) { | |
2096 | sc->ext.server_cert_type_ctos = OSSL_CERT_TYPE_CTOS_NONE; | |
2097 | sc->ext.server_cert_type = TLSEXT_cert_type_x509; | |
2098 | return 1; | |
2099 | } | |
2100 | ||
2101 | if (!PACKET_as_length_prefixed_1(pkt, &supported_cert_types)) { | |
2102 | SSLfatal(sc, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); | |
2103 | return 0; | |
2104 | } | |
2105 | ||
2106 | if ((len = PACKET_remaining(&supported_cert_types)) == 0) { | |
2107 | SSLfatal(sc, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); | |
2108 | return 0; | |
2109 | } | |
2110 | if (!PACKET_get_bytes(&supported_cert_types, &data, len)) { | |
2111 | SSLfatal(sc, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); | |
2112 | return 0; | |
2113 | } | |
2114 | /* server_cert_type: server (this) has priority */ | |
2115 | sc->ext.server_cert_type_ctos = reconcile_cert_type(sc->server_cert_type, sc->server_cert_type_len, | |
2116 | data, len, | |
2117 | &sc->ext.server_cert_type); | |
2118 | if (sc->ext.server_cert_type_ctos == OSSL_CERT_TYPE_CTOS_GOOD) | |
2119 | return 1; | |
2120 | ||
2121 | /* Did not receive an acceptable cert type */ | |
2122 | SSLfatal(sc, SSL_AD_UNSUPPORTED_CERTIFICATE, SSL_R_BAD_EXTENSION); | |
2123 | return 0; | |
2124 | } |