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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 | } | |
f2906631 MM |
576 | |
577 | if (((s->ext.psk_kex_mode & TLSEXT_KEX_MODE_FLAG_KE) != 0) | |
578 | && (s->options & SSL_OP_PREFER_NO_DHE_KEX) != 0) { | |
579 | ||
580 | /* | |
581 | * If NO_DHE is supported and preferred, then we only remember this | |
582 | * mode. DHE PSK will not be used for sure, because in any case where | |
583 | * it would be supported (i.e. if a key share is present), NO_DHE would | |
584 | * be supported as well. As the latter is preferred it would be | |
164a541b | 585 | * chosen. By removing DHE PSK here, we don't have to deal with the |
f2906631 MM |
586 | * SSL_OP_PREFER_NO_DHE_KEX option in any other place. |
587 | */ | |
588 | s->ext.psk_kex_mode = TLSEXT_KEX_MODE_FLAG_KE; | |
589 | } | |
590 | ||
b2f7e8c0 MC |
591 | #endif |
592 | ||
593 | return 1; | |
594 | } | |
595 | ||
25670f3e MC |
596 | /* |
597 | * Process a key_share extension received in the ClientHello. |pkt| contains | |
598 | * the raw PACKET data for the extension. Returns 1 on success or 0 on failure. | |
25670f3e | 599 | */ |
38b051a1 TM |
600 | int tls_parse_ctos_key_share(SSL_CONNECTION *s, PACKET *pkt, |
601 | unsigned int context, X509 *x, size_t chainidx) | |
25670f3e | 602 | { |
3cf96e88 | 603 | #ifndef OPENSSL_NO_TLS1_3 |
25670f3e MC |
604 | unsigned int group_id; |
605 | PACKET key_share_list, encoded_pt; | |
f48d826e DSH |
606 | const uint16_t *clntgroups, *srvrgroups; |
607 | size_t clnt_num_groups, srvr_num_groups; | |
43b95d73 | 608 | int found = 0; |
25670f3e | 609 | |
f4bbb37c | 610 | if (s->hit && (s->ext.psk_kex_mode & TLSEXT_KEX_MODE_FLAG_KE_DHE) == 0) |
25670f3e MC |
611 | return 1; |
612 | ||
613 | /* Sanity check */ | |
555cbb32 | 614 | if (s->s3.peer_tmp != NULL) { |
c48ffbcc | 615 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
616 | return 0; |
617 | } | |
618 | ||
619 | if (!PACKET_as_length_prefixed_2(pkt, &key_share_list)) { | |
c48ffbcc | 620 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
25670f3e MC |
621 | return 0; |
622 | } | |
623 | ||
f48d826e DSH |
624 | /* Get our list of supported groups */ |
625 | tls1_get_supported_groups(s, &srvrgroups, &srvr_num_groups); | |
626 | /* Get the clients list of supported groups. */ | |
627 | tls1_get_peer_groups(s, &clntgroups, &clnt_num_groups); | |
628 | if (clnt_num_groups == 0) { | |
b6fdc12d MC |
629 | /* |
630 | * This can only happen if the supported_groups extension was not sent, | |
631 | * because we verify that the length is non-zero when we process that | |
632 | * extension. | |
633 | */ | |
c48ffbcc | 634 | SSLfatal(s, SSL_AD_MISSING_EXTENSION, |
f63a17d6 | 635 | SSL_R_MISSING_SUPPORTED_GROUPS_EXTENSION); |
b6fdc12d MC |
636 | return 0; |
637 | } | |
25670f3e | 638 | |
555cbb32 | 639 | if (s->s3.group_id != 0 && PACKET_remaining(&key_share_list) == 0) { |
43054d3d MC |
640 | /* |
641 | * If we set a group_id already, then we must have sent an HRR | |
642 | * requesting a new key_share. If we haven't got one then that is an | |
643 | * error | |
644 | */ | |
c48ffbcc | 645 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_KEY_SHARE); |
43054d3d MC |
646 | return 0; |
647 | } | |
648 | ||
25670f3e MC |
649 | while (PACKET_remaining(&key_share_list) > 0) { |
650 | if (!PACKET_get_net_2(&key_share_list, &group_id) | |
651 | || !PACKET_get_length_prefixed_2(&key_share_list, &encoded_pt) | |
652 | || PACKET_remaining(&encoded_pt) == 0) { | |
c48ffbcc | 653 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
25670f3e MC |
654 | return 0; |
655 | } | |
656 | ||
657 | /* | |
658 | * If we already found a suitable key_share we loop through the | |
659 | * rest to verify the structure, but don't process them. | |
660 | */ | |
661 | if (found) | |
662 | continue; | |
663 | ||
43054d3d MC |
664 | /* |
665 | * If we sent an HRR then the key_share sent back MUST be for the group | |
666 | * we requested, and must be the only key_share sent. | |
667 | */ | |
555cbb32 | 668 | if (s->s3.group_id != 0 |
16f0e91c | 669 | && (group_id != s->s3.group_id |
43054d3d | 670 | || PACKET_remaining(&key_share_list) != 0)) { |
c48ffbcc | 671 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_KEY_SHARE); |
43054d3d MC |
672 | return 0; |
673 | } | |
674 | ||
25670f3e | 675 | /* Check if this share is in supported_groups sent from client */ |
f48d826e | 676 | if (!check_in_list(s, group_id, clntgroups, clnt_num_groups, 0)) { |
c48ffbcc | 677 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_KEY_SHARE); |
25670f3e MC |
678 | return 0; |
679 | } | |
680 | ||
681 | /* Check if this share is for a group we can use */ | |
247b8e52 MC |
682 | if (!check_in_list(s, group_id, srvrgroups, srvr_num_groups, 1) |
683 | || !tls_group_allowed(s, group_id, SSL_SECOP_CURVE_SUPPORTED) | |
684 | /* | |
685 | * We tolerate but ignore a group id that we don't think is | |
686 | * suitable for TLSv1.3 | |
687 | */ | |
688 | || !tls_valid_group(s, group_id, TLS1_3_VERSION, TLS1_3_VERSION, | |
689 | 0, NULL)) { | |
25670f3e MC |
690 | /* Share not suitable */ |
691 | continue; | |
692 | } | |
693 | ||
0a10825a BE |
694 | s->s3.group_id = group_id; |
695 | /* Cache the selected group ID in the SSL_SESSION */ | |
696 | s->session->kex_group = group_id; | |
697 | ||
ada66e78 | 698 | if ((s->s3.peer_tmp = ssl_generate_param_group(s, group_id)) == NULL) { |
c48ffbcc | 699 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
25670f3e MC |
700 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
701 | return 0; | |
702 | } | |
703 | ||
d5530efa TM |
704 | if (tls13_set_encoded_pub_key(s->s3.peer_tmp, |
705 | PACKET_data(&encoded_pt), | |
706 | PACKET_remaining(&encoded_pt)) <= 0) { | |
c48ffbcc | 707 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_ECPOINT); |
25670f3e MC |
708 | return 0; |
709 | } | |
710 | ||
711 | found = 1; | |
712 | } | |
3cf96e88 | 713 | #endif |
25670f3e MC |
714 | |
715 | return 1; | |
716 | } | |
717 | ||
38b051a1 TM |
718 | int tls_parse_ctos_cookie(SSL_CONNECTION *s, PACKET *pkt, unsigned int context, |
719 | X509 *x, size_t chainidx) | |
43054d3d | 720 | { |
1aac20f5 | 721 | #ifndef OPENSSL_NO_TLS1_3 |
dd77962e | 722 | unsigned int format, version, key_share, group_id; |
43054d3d MC |
723 | EVP_MD_CTX *hctx; |
724 | EVP_PKEY *pkey; | |
725 | PACKET cookie, raw, chhash, appcookie; | |
726 | WPACKET hrrpkt; | |
727 | const unsigned char *data, *mdin, *ciphdata; | |
728 | unsigned char hmac[SHA256_DIGEST_LENGTH]; | |
729 | unsigned char hrr[MAX_HRR_SIZE]; | |
730 | size_t rawlen, hmaclen, hrrlen, ciphlen; | |
e8a557dc | 731 | uint64_t tm, now; |
38b051a1 TM |
732 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
733 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); | |
43054d3d MC |
734 | |
735 | /* Ignore any cookie if we're not set up to verify it */ | |
38b051a1 | 736 | if (sctx->verify_stateless_cookie_cb == NULL |
555cbb32 | 737 | || (s->s3.flags & TLS1_FLAGS_STATELESS) == 0) |
43054d3d MC |
738 | return 1; |
739 | ||
740 | if (!PACKET_as_length_prefixed_2(pkt, &cookie)) { | |
c48ffbcc | 741 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
742 | return 0; |
743 | } | |
744 | ||
745 | raw = cookie; | |
746 | data = PACKET_data(&raw); | |
747 | rawlen = PACKET_remaining(&raw); | |
748 | if (rawlen < SHA256_DIGEST_LENGTH | |
749 | || !PACKET_forward(&raw, rawlen - SHA256_DIGEST_LENGTH)) { | |
c48ffbcc | 750 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
751 | return 0; |
752 | } | |
753 | mdin = PACKET_data(&raw); | |
754 | ||
755 | /* Verify the HMAC of the cookie */ | |
756 | hctx = EVP_MD_CTX_create(); | |
38b051a1 TM |
757 | pkey = EVP_PKEY_new_raw_private_key_ex(sctx->libctx, "HMAC", |
758 | sctx->propq, | |
d8652be0 MC |
759 | s->session_ctx->ext.cookie_hmac_key, |
760 | sizeof(s->session_ctx->ext.cookie_hmac_key)); | |
43054d3d MC |
761 | if (hctx == NULL || pkey == NULL) { |
762 | EVP_MD_CTX_free(hctx); | |
763 | EVP_PKEY_free(pkey); | |
e077455e | 764 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
43054d3d MC |
765 | return 0; |
766 | } | |
767 | ||
97ea1e7f | 768 | hmaclen = SHA256_DIGEST_LENGTH; |
38b051a1 TM |
769 | if (EVP_DigestSignInit_ex(hctx, NULL, "SHA2-256", sctx->libctx, |
770 | sctx->propq, pkey, NULL) <= 0 | |
97ea1e7f MC |
771 | || EVP_DigestSign(hctx, hmac, &hmaclen, data, |
772 | rawlen - SHA256_DIGEST_LENGTH) <= 0 | |
43054d3d MC |
773 | || hmaclen != SHA256_DIGEST_LENGTH) { |
774 | EVP_MD_CTX_free(hctx); | |
775 | EVP_PKEY_free(pkey); | |
c48ffbcc | 776 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
777 | return 0; |
778 | } | |
779 | ||
780 | EVP_MD_CTX_free(hctx); | |
781 | EVP_PKEY_free(pkey); | |
782 | ||
783 | if (CRYPTO_memcmp(hmac, mdin, SHA256_DIGEST_LENGTH) != 0) { | |
c48ffbcc | 784 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_COOKIE_MISMATCH); |
43054d3d MC |
785 | return 0; |
786 | } | |
787 | ||
788 | if (!PACKET_get_net_2(&cookie, &format)) { | |
c48ffbcc | 789 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
790 | return 0; |
791 | } | |
792 | /* Check the cookie format is something we recognise. Ignore it if not */ | |
793 | if (format != COOKIE_STATE_FORMAT_VERSION) | |
794 | return 1; | |
795 | ||
796 | /* | |
797 | * The rest of these checks really shouldn't fail since we have verified the | |
798 | * HMAC above. | |
799 | */ | |
800 | ||
801 | /* Check the version number is sane */ | |
802 | if (!PACKET_get_net_2(&cookie, &version)) { | |
c48ffbcc | 803 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
804 | return 0; |
805 | } | |
806 | if (version != TLS1_3_VERSION) { | |
c48ffbcc | 807 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
43054d3d MC |
808 | SSL_R_BAD_PROTOCOL_VERSION_NUMBER); |
809 | return 0; | |
810 | } | |
811 | ||
dd77962e | 812 | if (!PACKET_get_net_2(&cookie, &group_id)) { |
c48ffbcc | 813 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
814 | return 0; |
815 | } | |
dd77962e | 816 | |
43054d3d MC |
817 | ciphdata = PACKET_data(&cookie); |
818 | if (!PACKET_forward(&cookie, 2)) { | |
c48ffbcc | 819 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
820 | return 0; |
821 | } | |
555cbb32 TS |
822 | if (group_id != s->s3.group_id |
823 | || s->s3.tmp.new_cipher | |
dd77962e MC |
824 | != ssl_get_cipher_by_char(s, ciphdata, 0)) { |
825 | /* | |
826 | * We chose a different cipher or group id this time around to what is | |
827 | * in the cookie. Something must have changed. | |
828 | */ | |
c48ffbcc | 829 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_CIPHER); |
43054d3d MC |
830 | return 0; |
831 | } | |
832 | ||
833 | if (!PACKET_get_1(&cookie, &key_share) | |
e8a557dc | 834 | || !PACKET_get_net_8(&cookie, &tm) |
43054d3d MC |
835 | || !PACKET_get_length_prefixed_2(&cookie, &chhash) |
836 | || !PACKET_get_length_prefixed_1(&cookie, &appcookie) | |
837 | || PACKET_remaining(&cookie) != SHA256_DIGEST_LENGTH) { | |
c48ffbcc | 838 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
839 | return 0; |
840 | } | |
841 | ||
d0debc0a | 842 | /* We tolerate a cookie age of up to 10 minutes (= 60 * 10 seconds) */ |
e8a557dc | 843 | now = time(NULL); |
d0debc0a MC |
844 | if (tm > now || (now - tm) > 600) { |
845 | /* Cookie is stale. Ignore it */ | |
846 | return 1; | |
847 | } | |
848 | ||
43054d3d | 849 | /* Verify the app cookie */ |
38b051a1 TM |
850 | if (sctx->verify_stateless_cookie_cb(ssl, |
851 | PACKET_data(&appcookie), | |
852 | PACKET_remaining(&appcookie)) == 0) { | |
c48ffbcc | 853 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_COOKIE_MISMATCH); |
43054d3d MC |
854 | return 0; |
855 | } | |
856 | ||
857 | /* | |
858 | * Reconstruct the HRR that we would have sent in response to the original | |
859 | * ClientHello so we can add it to the transcript hash. | |
860 | * Note: This won't work with custom HRR extensions | |
861 | */ | |
862 | if (!WPACKET_init_static_len(&hrrpkt, hrr, sizeof(hrr), 0)) { | |
c48ffbcc | 863 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
864 | return 0; |
865 | } | |
866 | if (!WPACKET_put_bytes_u8(&hrrpkt, SSL3_MT_SERVER_HELLO) | |
867 | || !WPACKET_start_sub_packet_u24(&hrrpkt) | |
868 | || !WPACKET_put_bytes_u16(&hrrpkt, TLS1_2_VERSION) | |
869 | || !WPACKET_memcpy(&hrrpkt, hrrrandom, SSL3_RANDOM_SIZE) | |
870 | || !WPACKET_sub_memcpy_u8(&hrrpkt, s->tmp_session_id, | |
871 | s->tmp_session_id_len) | |
38b051a1 TM |
872 | || !ssl->method->put_cipher_by_char(s->s3.tmp.new_cipher, &hrrpkt, |
873 | &ciphlen) | |
43054d3d MC |
874 | || !WPACKET_put_bytes_u8(&hrrpkt, 0) |
875 | || !WPACKET_start_sub_packet_u16(&hrrpkt)) { | |
876 | WPACKET_cleanup(&hrrpkt); | |
c48ffbcc | 877 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
878 | return 0; |
879 | } | |
880 | if (!WPACKET_put_bytes_u16(&hrrpkt, TLSEXT_TYPE_supported_versions) | |
881 | || !WPACKET_start_sub_packet_u16(&hrrpkt) | |
35e742ec | 882 | || !WPACKET_put_bytes_u16(&hrrpkt, s->version) |
43054d3d MC |
883 | || !WPACKET_close(&hrrpkt)) { |
884 | WPACKET_cleanup(&hrrpkt); | |
c48ffbcc | 885 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
886 | return 0; |
887 | } | |
888 | if (key_share) { | |
889 | if (!WPACKET_put_bytes_u16(&hrrpkt, TLSEXT_TYPE_key_share) | |
890 | || !WPACKET_start_sub_packet_u16(&hrrpkt) | |
555cbb32 | 891 | || !WPACKET_put_bytes_u16(&hrrpkt, s->s3.group_id) |
43054d3d MC |
892 | || !WPACKET_close(&hrrpkt)) { |
893 | WPACKET_cleanup(&hrrpkt); | |
c48ffbcc | 894 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
895 | return 0; |
896 | } | |
897 | } | |
898 | if (!WPACKET_put_bytes_u16(&hrrpkt, TLSEXT_TYPE_cookie) | |
899 | || !WPACKET_start_sub_packet_u16(&hrrpkt) | |
900 | || !WPACKET_sub_memcpy_u16(&hrrpkt, data, rawlen) | |
901 | || !WPACKET_close(&hrrpkt) /* cookie extension */ | |
902 | || !WPACKET_close(&hrrpkt) /* extension block */ | |
903 | || !WPACKET_close(&hrrpkt) /* message */ | |
904 | || !WPACKET_get_total_written(&hrrpkt, &hrrlen) | |
905 | || !WPACKET_finish(&hrrpkt)) { | |
906 | WPACKET_cleanup(&hrrpkt); | |
c48ffbcc | 907 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
908 | return 0; |
909 | } | |
910 | ||
911 | /* Reconstruct the transcript hash */ | |
912 | if (!create_synthetic_message_hash(s, PACKET_data(&chhash), | |
913 | PACKET_remaining(&chhash), hrr, | |
914 | hrrlen)) { | |
915 | /* SSLfatal() already called */ | |
916 | return 0; | |
917 | } | |
918 | ||
919 | /* Act as if this ClientHello came after a HelloRetryRequest */ | |
5ac7ee4d | 920 | s->hello_retry_request = SSL_HRR_PENDING; |
43054d3d | 921 | |
c36001c3 | 922 | s->ext.cookieok = 1; |
1aac20f5 | 923 | #endif |
c36001c3 | 924 | |
43054d3d MC |
925 | return 1; |
926 | } | |
927 | ||
38b051a1 TM |
928 | int tls_parse_ctos_supported_groups(SSL_CONNECTION *s, PACKET *pkt, |
929 | unsigned int context, | |
f63a17d6 | 930 | X509 *x, size_t chainidx) |
25670f3e MC |
931 | { |
932 | PACKET supported_groups_list; | |
933 | ||
934 | /* Each group is 2 bytes and we must have at least 1. */ | |
935 | if (!PACKET_as_length_prefixed_2(pkt, &supported_groups_list) | |
936 | || PACKET_remaining(&supported_groups_list) == 0 | |
937 | || (PACKET_remaining(&supported_groups_list) % 2) != 0) { | |
c48ffbcc | 938 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
939 | return 0; |
940 | } | |
941 | ||
38b051a1 | 942 | if (!s->hit || SSL_CONNECTION_IS_TLS13(s)) { |
45436e61 MC |
943 | OPENSSL_free(s->ext.peer_supportedgroups); |
944 | s->ext.peer_supportedgroups = NULL; | |
945 | s->ext.peer_supportedgroups_len = 0; | |
9e84a42d | 946 | if (!tls1_save_u16(&supported_groups_list, |
45436e61 MC |
947 | &s->ext.peer_supportedgroups, |
948 | &s->ext.peer_supportedgroups_len)) { | |
c48ffbcc | 949 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
e3743355 BK |
950 | return 0; |
951 | } | |
25670f3e MC |
952 | } |
953 | ||
954 | return 1; | |
955 | } | |
25670f3e | 956 | |
38b051a1 TM |
957 | int tls_parse_ctos_ems(SSL_CONNECTION *s, PACKET *pkt, unsigned int context, |
958 | X509 *x, size_t chainidx) | |
25670f3e MC |
959 | { |
960 | /* The extension must always be empty */ | |
961 | if (PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 962 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
963 | return 0; |
964 | } | |
965 | ||
088dfa13 TS |
966 | if (s->options & SSL_OP_NO_EXTENDED_MASTER_SECRET) |
967 | return 1; | |
968 | ||
555cbb32 | 969 | s->s3.flags |= TLS1_FLAGS_RECEIVED_EXTMS; |
25670f3e MC |
970 | |
971 | return 1; | |
972 | } | |
7da160b0 | 973 | |
38df5a45 | 974 | |
38b051a1 | 975 | int tls_parse_ctos_early_data(SSL_CONNECTION *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 976 | X509 *x, size_t chainidx) |
38df5a45 MC |
977 | { |
978 | if (PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 979 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
38df5a45 MC |
980 | return 0; |
981 | } | |
982 | ||
fc7129dc | 983 | if (s->hello_retry_request != SSL_HRR_NONE) { |
c48ffbcc | 984 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_EXTENSION); |
d4504fe5 MC |
985 | return 0; |
986 | } | |
987 | ||
38df5a45 MC |
988 | return 1; |
989 | } | |
990 | ||
38b051a1 | 991 | static SSL_TICKET_STATUS tls_get_stateful_ticket(SSL_CONNECTION *s, PACKET *tick, |
6cc0b3c2 MC |
992 | SSL_SESSION **sess) |
993 | { | |
994 | SSL_SESSION *tmpsess = NULL; | |
995 | ||
5f26ddff MC |
996 | s->ext.ticket_expected = 1; |
997 | ||
6cc0b3c2 MC |
998 | switch (PACKET_remaining(tick)) { |
999 | case 0: | |
1000 | return SSL_TICKET_EMPTY; | |
1001 | ||
1002 | case SSL_MAX_SSL_SESSION_ID_LENGTH: | |
1003 | break; | |
1004 | ||
1005 | default: | |
1006 | return SSL_TICKET_NO_DECRYPT; | |
1007 | } | |
1008 | ||
1009 | tmpsess = lookup_sess_in_cache(s, PACKET_data(tick), | |
1010 | SSL_MAX_SSL_SESSION_ID_LENGTH); | |
1011 | ||
1012 | if (tmpsess == NULL) | |
1013 | return SSL_TICKET_NO_DECRYPT; | |
1014 | ||
6cc0b3c2 MC |
1015 | *sess = tmpsess; |
1016 | return SSL_TICKET_SUCCESS; | |
1017 | } | |
1018 | ||
38b051a1 TM |
1019 | int tls_parse_ctos_psk(SSL_CONNECTION *s, PACKET *pkt, unsigned int context, |
1020 | X509 *x, size_t chainidx) | |
1053a6e2 MC |
1021 | { |
1022 | PACKET identities, binders, binder; | |
1023 | size_t binderoffset, hashsize; | |
1024 | SSL_SESSION *sess = NULL; | |
3a7c56b2 | 1025 | unsigned int id, i, ext = 0; |
1053a6e2 | 1026 | const EVP_MD *md = NULL; |
38b051a1 TM |
1027 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
1028 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); | |
1053a6e2 | 1029 | |
1a9f457c MC |
1030 | /* |
1031 | * If we have no PSK kex mode that we recognise then we can't resume so | |
1032 | * ignore this extension | |
1033 | */ | |
1034 | if ((s->ext.psk_kex_mode | |
1035 | & (TLSEXT_KEX_MODE_FLAG_KE | TLSEXT_KEX_MODE_FLAG_KE_DHE)) == 0) | |
1036 | return 1; | |
1037 | ||
1053a6e2 | 1038 | if (!PACKET_get_length_prefixed_2(pkt, &identities)) { |
c48ffbcc | 1039 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1053a6e2 MC |
1040 | return 0; |
1041 | } | |
1042 | ||
61fb5923 | 1043 | s->ext.ticket_expected = 0; |
1053a6e2 MC |
1044 | for (id = 0; PACKET_remaining(&identities) != 0; id++) { |
1045 | PACKET identity; | |
2c604cb9 | 1046 | unsigned long ticket_agel; |
f3d40db1 | 1047 | size_t idlen; |
1053a6e2 MC |
1048 | |
1049 | if (!PACKET_get_length_prefixed_2(&identities, &identity) | |
2c604cb9 | 1050 | || !PACKET_get_net_4(&identities, &ticket_agel)) { |
c48ffbcc | 1051 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1053a6e2 MC |
1052 | return 0; |
1053 | } | |
1054 | ||
f3d40db1 | 1055 | idlen = PACKET_remaining(&identity); |
3a7c56b2 | 1056 | if (s->psk_find_session_cb != NULL |
38b051a1 | 1057 | && !s->psk_find_session_cb(ssl, PACKET_data(&identity), idlen, |
011d768a | 1058 | &sess)) { |
c48ffbcc | 1059 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_EXTENSION); |
011d768a MC |
1060 | return 0; |
1061 | } | |
1062 | ||
c2b290c3 | 1063 | #ifndef OPENSSL_NO_PSK |
1287dabd | 1064 | if (sess == NULL |
f3d40db1 MC |
1065 | && s->psk_server_callback != NULL |
1066 | && idlen <= PSK_MAX_IDENTITY_LEN) { | |
1067 | char *pskid = NULL; | |
1068 | unsigned char pskdata[PSK_MAX_PSK_LEN]; | |
1069 | unsigned int pskdatalen; | |
1070 | ||
1071 | if (!PACKET_strndup(&identity, &pskid)) { | |
c48ffbcc | 1072 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
1073 | return 0; |
1074 | } | |
38b051a1 | 1075 | pskdatalen = s->psk_server_callback(ssl, pskid, pskdata, |
f3d40db1 MC |
1076 | sizeof(pskdata)); |
1077 | OPENSSL_free(pskid); | |
1078 | if (pskdatalen > PSK_MAX_PSK_LEN) { | |
c48ffbcc | 1079 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
1080 | return 0; |
1081 | } else if (pskdatalen > 0) { | |
1082 | const SSL_CIPHER *cipher; | |
1083 | const unsigned char tls13_aes128gcmsha256_id[] = { 0x13, 0x01 }; | |
1084 | ||
1085 | /* | |
1086 | * We found a PSK using an old style callback. We don't know | |
1087 | * the digest so we default to SHA256 as per the TLSv1.3 spec | |
1088 | */ | |
38b051a1 | 1089 | cipher = SSL_CIPHER_find(ssl, tls13_aes128gcmsha256_id); |
f3d40db1 MC |
1090 | if (cipher == NULL) { |
1091 | OPENSSL_cleanse(pskdata, pskdatalen); | |
c48ffbcc | 1092 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
1093 | return 0; |
1094 | } | |
1095 | ||
1096 | sess = SSL_SESSION_new(); | |
1097 | if (sess == NULL | |
1098 | || !SSL_SESSION_set1_master_key(sess, pskdata, | |
1099 | pskdatalen) | |
1100 | || !SSL_SESSION_set_cipher(sess, cipher) | |
1101 | || !SSL_SESSION_set_protocol_version(sess, | |
1102 | TLS1_3_VERSION)) { | |
1103 | OPENSSL_cleanse(pskdata, pskdatalen); | |
c48ffbcc | 1104 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
1105 | goto err; |
1106 | } | |
1107 | OPENSSL_cleanse(pskdata, pskdatalen); | |
1108 | } | |
1109 | } | |
c2b290c3 | 1110 | #endif /* OPENSSL_NO_PSK */ |
f3d40db1 | 1111 | |
011d768a MC |
1112 | if (sess != NULL) { |
1113 | /* We found a PSK */ | |
3a7c56b2 | 1114 | SSL_SESSION *sesstmp = ssl_session_dup(sess, 0); |
1b8bacff | 1115 | |
3a7c56b2 | 1116 | if (sesstmp == NULL) { |
c48ffbcc | 1117 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
3a7c56b2 MC |
1118 | return 0; |
1119 | } | |
1120 | SSL_SESSION_free(sess); | |
1121 | sess = sesstmp; | |
1122 | ||
1123 | /* | |
1124 | * We've just been told to use this session for this context so | |
1125 | * make sure the sid_ctx matches up. | |
1126 | */ | |
1127 | memcpy(sess->sid_ctx, s->sid_ctx, s->sid_ctx_length); | |
1128 | sess->sid_ctx_length = s->sid_ctx_length; | |
1129 | ext = 1; | |
630369d9 MC |
1130 | if (id == 0) |
1131 | s->ext.early_data_ok = 1; | |
51256b34 | 1132 | s->ext.ticket_expected = 1; |
3a7c56b2 | 1133 | } else { |
f0131dc0 | 1134 | OSSL_TIME t, age, expire; |
61fb5923 MC |
1135 | int ret; |
1136 | ||
e880d4e5 MC |
1137 | /* |
1138 | * If we are using anti-replay protection then we behave as if | |
1139 | * SSL_OP_NO_TICKET is set - we are caching tickets anyway so there | |
1140 | * is no point in using full stateless tickets. | |
1141 | */ | |
1142 | if ((s->options & SSL_OP_NO_TICKET) != 0 | |
5d263fb7 MC |
1143 | || (s->max_early_data > 0 |
1144 | && (s->options & SSL_OP_NO_ANTI_REPLAY) == 0)) | |
6cc0b3c2 MC |
1145 | ret = tls_get_stateful_ticket(s, &identity, &sess); |
1146 | else | |
1147 | ret = tls_decrypt_ticket(s, PACKET_data(&identity), | |
1148 | PACKET_remaining(&identity), NULL, 0, | |
1149 | &sess); | |
61fb5923 MC |
1150 | |
1151 | if (ret == SSL_TICKET_EMPTY) { | |
c48ffbcc | 1152 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
61fb5923 MC |
1153 | return 0; |
1154 | } | |
3a7c56b2 | 1155 | |
df0fed9a TS |
1156 | if (ret == SSL_TICKET_FATAL_ERR_MALLOC |
1157 | || ret == SSL_TICKET_FATAL_ERR_OTHER) { | |
c48ffbcc | 1158 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
3a7c56b2 MC |
1159 | return 0; |
1160 | } | |
61fb5923 | 1161 | if (ret == SSL_TICKET_NONE || ret == SSL_TICKET_NO_DECRYPT) |
3a7c56b2 MC |
1162 | continue; |
1163 | ||
66d7de16 MC |
1164 | /* Check for replay */ |
1165 | if (s->max_early_data > 0 | |
5d263fb7 | 1166 | && (s->options & SSL_OP_NO_ANTI_REPLAY) == 0 |
66d7de16 MC |
1167 | && !SSL_CTX_remove_session(s->session_ctx, sess)) { |
1168 | SSL_SESSION_free(sess); | |
1169 | sess = NULL; | |
1170 | continue; | |
1171 | } | |
1172 | ||
0513a383 MC |
1173 | age = ossl_time_subtract(ossl_ms2time(ticket_agel), |
1174 | ossl_ms2time(sess->ext.tick_age_add)); | |
f0131dc0 | 1175 | t = ossl_time_subtract(ossl_time_now(), sess->time); |
3a7c56b2 MC |
1176 | |
1177 | /* | |
0513a383 MC |
1178 | * Although internally we use OSS_TIME which has ns granularity, |
1179 | * when SSL_SESSION structures are serialised/deserialised we use | |
1180 | * second granularity for the sess->time field. Therefore it could | |
1181 | * appear that the client's ticket age is longer than ours (our | |
1182 | * ticket age calculation should always be slightly longer than the | |
1183 | * client's due to the network latency). Therefore we add 1000ms to | |
1184 | * our age calculation to adjust for rounding errors. | |
3a7c56b2 | 1185 | */ |
f0131dc0 P |
1186 | expire = ossl_time_add(t, ossl_ms2time(1000)); |
1187 | ||
630369d9 | 1188 | if (id == 0 |
f0131dc0 P |
1189 | && ossl_time_compare(sess->timeout, t) >= 0 |
1190 | && ossl_time_compare(age, expire) <= 0 | |
1191 | && ossl_time_compare(ossl_time_add(age, TICKET_AGE_ALLOWANCE), | |
1192 | expire) >= 0) { | |
3a7c56b2 MC |
1193 | /* |
1194 | * Ticket age is within tolerance and not expired. We allow it | |
1195 | * for early data | |
1196 | */ | |
1197 | s->ext.early_data_ok = 1; | |
1198 | } | |
1053a6e2 | 1199 | } |
1053a6e2 | 1200 | |
38b051a1 | 1201 | md = ssl_md(sctx, sess->cipher->algorithm2); |
b740012f | 1202 | if (md == NULL) { |
1203 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
1204 | goto err; | |
1205 | } | |
c8f6c28a | 1206 | if (!EVP_MD_is_a(md, |
38b051a1 | 1207 | EVP_MD_get0_name(ssl_md(sctx, |
ed576acd | 1208 | s->s3.tmp.new_cipher->algorithm2)))) { |
0de6d66d | 1209 | /* The ciphersuite is not compatible with this session. */ |
1053a6e2 MC |
1210 | SSL_SESSION_free(sess); |
1211 | sess = NULL; | |
630369d9 | 1212 | s->ext.early_data_ok = 0; |
51256b34 | 1213 | s->ext.ticket_expected = 0; |
1053a6e2 MC |
1214 | continue; |
1215 | } | |
1053a6e2 MC |
1216 | break; |
1217 | } | |
1218 | ||
1219 | if (sess == NULL) | |
1220 | return 1; | |
1221 | ||
1222 | binderoffset = PACKET_data(pkt) - (const unsigned char *)s->init_buf->data; | |
ed576acd | 1223 | hashsize = EVP_MD_get_size(md); |
1053a6e2 MC |
1224 | |
1225 | if (!PACKET_get_length_prefixed_2(pkt, &binders)) { | |
c48ffbcc | 1226 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1053a6e2 MC |
1227 | goto err; |
1228 | } | |
1229 | ||
1230 | for (i = 0; i <= id; i++) { | |
1231 | if (!PACKET_get_length_prefixed_1(&binders, &binder)) { | |
c48ffbcc | 1232 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1053a6e2 MC |
1233 | goto err; |
1234 | } | |
1235 | } | |
1236 | ||
2894e9cb | 1237 | if (PACKET_remaining(&binder) != hashsize) { |
c48ffbcc | 1238 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
2894e9cb MC |
1239 | goto err; |
1240 | } | |
1241 | if (tls_psk_do_binder(s, md, (const unsigned char *)s->init_buf->data, | |
1242 | binderoffset, PACKET_data(&binder), NULL, sess, 0, | |
1243 | ext) != 1) { | |
635c8f77 | 1244 | /* SSLfatal() already called */ |
1053a6e2 MC |
1245 | goto err; |
1246 | } | |
1247 | ||
c96ce52c | 1248 | s->ext.tick_identity = id; |
2c604cb9 | 1249 | |
1053a6e2 MC |
1250 | SSL_SESSION_free(s->session); |
1251 | s->session = sess; | |
1053a6e2 MC |
1252 | return 1; |
1253 | err: | |
312e9387 | 1254 | SSL_SESSION_free(sess); |
1053a6e2 MC |
1255 | return 0; |
1256 | } | |
1257 | ||
38b051a1 | 1258 | int tls_parse_ctos_post_handshake_auth(SSL_CONNECTION *s, PACKET *pkt, |
a7e6a3d8 P |
1259 | ossl_unused unsigned int context, |
1260 | ossl_unused X509 *x, | |
1261 | ossl_unused size_t chainidx) | |
9d75dce3 TS |
1262 | { |
1263 | if (PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 1264 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
9d75dce3 TS |
1265 | SSL_R_POST_HANDSHAKE_AUTH_ENCODING_ERR); |
1266 | return 0; | |
1267 | } | |
1268 | ||
1269 | s->post_handshake_auth = SSL_PHA_EXT_RECEIVED; | |
1270 | ||
1271 | return 1; | |
1272 | } | |
1273 | ||
1266eefd MC |
1274 | /* |
1275 | * Add the server's renegotiation binding | |
1276 | */ | |
38b051a1 | 1277 | EXT_RETURN tls_construct_stoc_renegotiate(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1278 | unsigned int context, X509 *x, |
f63a17d6 | 1279 | size_t chainidx) |
7da160b0 | 1280 | { |
555cbb32 | 1281 | if (!s->s3.send_connection_binding) |
b186a592 | 1282 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 1283 | |
db0f35dd | 1284 | /* Still add this even if SSL_OP_NO_RENEGOTIATION is set */ |
7da160b0 MC |
1285 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_renegotiate) |
1286 | || !WPACKET_start_sub_packet_u16(pkt) | |
1287 | || !WPACKET_start_sub_packet_u8(pkt) | |
555cbb32 TS |
1288 | || !WPACKET_memcpy(pkt, s->s3.previous_client_finished, |
1289 | s->s3.previous_client_finished_len) | |
1290 | || !WPACKET_memcpy(pkt, s->s3.previous_server_finished, | |
1291 | s->s3.previous_server_finished_len) | |
7da160b0 MC |
1292 | || !WPACKET_close(pkt) |
1293 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1294 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1295 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1296 | } |
1297 | ||
b186a592 | 1298 | return EXT_RETURN_SENT; |
7da160b0 MC |
1299 | } |
1300 | ||
38b051a1 | 1301 | EXT_RETURN tls_construct_stoc_server_name(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1302 | unsigned int context, X509 *x, |
f63a17d6 | 1303 | size_t chainidx) |
7da160b0 | 1304 | { |
7955c1f1 MC |
1305 | if (s->servername_done != 1) |
1306 | return EXT_RETURN_NOT_SENT; | |
1307 | ||
1308 | /* | |
1309 | * Prior to TLSv1.3 we ignore any SNI in the current handshake if resuming. | |
1310 | * We just use the servername from the initial handshake. | |
1311 | */ | |
38b051a1 | 1312 | if (s->hit && !SSL_CONNECTION_IS_TLS13(s)) |
b186a592 | 1313 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1314 | |
1315 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_server_name) | |
1316 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
c48ffbcc | 1317 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1318 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1319 | } |
1320 | ||
b186a592 | 1321 | return EXT_RETURN_SENT; |
7da160b0 MC |
1322 | } |
1323 | ||
cf72c757 | 1324 | /* Add/include the server's max fragment len extension into ServerHello */ |
38b051a1 | 1325 | EXT_RETURN tls_construct_stoc_maxfragmentlen(SSL_CONNECTION *s, WPACKET *pkt, |
cf72c757 | 1326 | unsigned int context, X509 *x, |
f63a17d6 | 1327 | size_t chainidx) |
cf72c757 F |
1328 | { |
1329 | if (!USE_MAX_FRAGMENT_LENGTH_EXT(s->session)) | |
1330 | return EXT_RETURN_NOT_SENT; | |
1331 | ||
1332 | /*- | |
1333 | * 4 bytes for this extension type and extension length | |
1334 | * 1 byte for the Max Fragment Length code value. | |
1335 | */ | |
1336 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_max_fragment_length) | |
1337 | || !WPACKET_start_sub_packet_u16(pkt) | |
1338 | || !WPACKET_put_bytes_u8(pkt, s->session->ext.max_fragment_len_mode) | |
1339 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1340 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
cf72c757 F |
1341 | return EXT_RETURN_FAIL; |
1342 | } | |
1343 | ||
1344 | return EXT_RETURN_SENT; | |
1345 | } | |
1346 | ||
38b051a1 | 1347 | EXT_RETURN tls_construct_stoc_ec_pt_formats(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1348 | unsigned int context, X509 *x, |
f63a17d6 | 1349 | size_t chainidx) |
7da160b0 | 1350 | { |
555cbb32 TS |
1351 | unsigned long alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
1352 | unsigned long alg_a = s->s3.tmp.new_cipher->algorithm_auth; | |
89247375 | 1353 | int using_ecc = ((alg_k & SSL_kECDHE) || (alg_a & SSL_aECDSA)) |
cd0fb43c | 1354 | && (s->ext.peer_ecpointformats != NULL); |
7da160b0 MC |
1355 | const unsigned char *plist; |
1356 | size_t plistlen; | |
1357 | ||
1358 | if (!using_ecc) | |
b186a592 | 1359 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1360 | |
1361 | tls1_get_formatlist(s, &plist, &plistlen); | |
7da160b0 MC |
1362 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_ec_point_formats) |
1363 | || !WPACKET_start_sub_packet_u16(pkt) | |
1364 | || !WPACKET_sub_memcpy_u8(pkt, plist, plistlen) | |
1365 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1366 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1367 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1368 | } |
1369 | ||
b186a592 | 1370 | return EXT_RETURN_SENT; |
7da160b0 | 1371 | } |
7da160b0 | 1372 | |
38b051a1 | 1373 | EXT_RETURN tls_construct_stoc_supported_groups(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1374 | unsigned int context, X509 *x, |
f63a17d6 | 1375 | size_t chainidx) |
6af87546 | 1376 | { |
9e84a42d | 1377 | const uint16_t *groups; |
6af87546 | 1378 | size_t numgroups, i, first = 1; |
9d2d857f | 1379 | int version; |
6af87546 | 1380 | |
555cbb32 TS |
1381 | /* s->s3.group_id is non zero if we accepted a key_share */ |
1382 | if (s->s3.group_id == 0) | |
b186a592 | 1383 | return EXT_RETURN_NOT_SENT; |
6af87546 MC |
1384 | |
1385 | /* Get our list of supported groups */ | |
ff6d20a6 | 1386 | tls1_get_supported_groups(s, &groups, &numgroups); |
34e5292c | 1387 | if (numgroups == 0) { |
c48ffbcc | 1388 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1389 | return EXT_RETURN_FAIL; |
6af87546 MC |
1390 | } |
1391 | ||
1392 | /* Copy group ID if supported */ | |
38b051a1 | 1393 | version = SSL_version(SSL_CONNECTION_GET_SSL(s)); |
9e84a42d DSH |
1394 | for (i = 0; i < numgroups; i++) { |
1395 | uint16_t group = groups[i]; | |
1396 | ||
8b1db5d3 | 1397 | if (tls_valid_group(s, group, version, version, 0, NULL) |
dbc6268f | 1398 | && tls_group_allowed(s, group, SSL_SECOP_CURVE_SUPPORTED)) { |
6af87546 MC |
1399 | if (first) { |
1400 | /* | |
1401 | * Check if the client is already using our preferred group. If | |
1402 | * so we don't need to add this extension | |
1403 | */ | |
555cbb32 | 1404 | if (s->s3.group_id == group) |
b186a592 | 1405 | return EXT_RETURN_NOT_SENT; |
6af87546 MC |
1406 | |
1407 | /* Add extension header */ | |
1408 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_groups) | |
1409 | /* Sub-packet for supported_groups extension */ | |
1410 | || !WPACKET_start_sub_packet_u16(pkt) | |
1411 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
c48ffbcc | 1412 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1413 | return EXT_RETURN_FAIL; |
6af87546 MC |
1414 | } |
1415 | ||
1416 | first = 0; | |
1417 | } | |
9e84a42d | 1418 | if (!WPACKET_put_bytes_u16(pkt, group)) { |
c48ffbcc | 1419 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1420 | return EXT_RETURN_FAIL; |
6af87546 MC |
1421 | } |
1422 | } | |
1423 | } | |
1424 | ||
1425 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
c48ffbcc | 1426 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1427 | return EXT_RETURN_FAIL; |
6af87546 MC |
1428 | } |
1429 | ||
b186a592 | 1430 | return EXT_RETURN_SENT; |
6af87546 MC |
1431 | } |
1432 | ||
38b051a1 | 1433 | EXT_RETURN tls_construct_stoc_session_ticket(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1434 | unsigned int context, X509 *x, |
f63a17d6 | 1435 | size_t chainidx) |
7da160b0 | 1436 | { |
aff8c126 RS |
1437 | if (!s->ext.ticket_expected || !tls_use_ticket(s)) { |
1438 | s->ext.ticket_expected = 0; | |
b186a592 | 1439 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1440 | } |
1441 | ||
1442 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket) | |
1443 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
c48ffbcc | 1444 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1445 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1446 | } |
1447 | ||
b186a592 | 1448 | return EXT_RETURN_SENT; |
7da160b0 MC |
1449 | } |
1450 | ||
ab83e314 | 1451 | #ifndef OPENSSL_NO_OCSP |
38b051a1 | 1452 | EXT_RETURN tls_construct_stoc_status_request(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1453 | unsigned int context, X509 *x, |
f63a17d6 | 1454 | size_t chainidx) |
7da160b0 | 1455 | { |
debb64a0 MC |
1456 | /* We don't currently support this extension inside a CertificateRequest */ |
1457 | if (context == SSL_EXT_TLS1_3_CERTIFICATE_REQUEST) | |
1458 | return EXT_RETURN_NOT_SENT; | |
1459 | ||
aff8c126 | 1460 | if (!s->ext.status_expected) |
b186a592 | 1461 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 1462 | |
38b051a1 | 1463 | if (SSL_CONNECTION_IS_TLS13(s) && chainidx != 0) |
b186a592 | 1464 | return EXT_RETURN_NOT_SENT; |
e96e0f8e | 1465 | |
7da160b0 | 1466 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request) |
f63e4288 | 1467 | || !WPACKET_start_sub_packet_u16(pkt)) { |
c48ffbcc | 1468 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1469 | return EXT_RETURN_FAIL; |
f63e4288 MC |
1470 | } |
1471 | ||
1472 | /* | |
1473 | * In TLSv1.3 we include the certificate status itself. In <= TLSv1.2 we | |
1474 | * send back an empty extension, with the certificate status appearing as a | |
1475 | * separate message | |
1476 | */ | |
38b051a1 | 1477 | if (SSL_CONNECTION_IS_TLS13(s) && !tls_construct_cert_status_body(s, pkt)) { |
3ec8d113 | 1478 | /* SSLfatal() already called */ |
56d36288 | 1479 | return EXT_RETURN_FAIL; |
3ec8d113 MC |
1480 | } |
1481 | if (!WPACKET_close(pkt)) { | |
c48ffbcc | 1482 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1483 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1484 | } |
1485 | ||
b186a592 | 1486 | return EXT_RETURN_SENT; |
7da160b0 | 1487 | } |
ab83e314 | 1488 | #endif |
7da160b0 | 1489 | |
7da160b0 | 1490 | #ifndef OPENSSL_NO_NEXTPROTONEG |
38b051a1 | 1491 | EXT_RETURN tls_construct_stoc_next_proto_neg(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1492 | unsigned int context, X509 *x, |
f63a17d6 | 1493 | size_t chainidx) |
7da160b0 MC |
1494 | { |
1495 | const unsigned char *npa; | |
1496 | unsigned int npalen; | |
1497 | int ret; | |
555cbb32 | 1498 | int npn_seen = s->s3.npn_seen; |
38b051a1 | 1499 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
7da160b0 | 1500 | |
555cbb32 | 1501 | s->s3.npn_seen = 0; |
38b051a1 | 1502 | if (!npn_seen || sctx->ext.npn_advertised_cb == NULL) |
b186a592 | 1503 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 1504 | |
38b051a1 TM |
1505 | ret = sctx->ext.npn_advertised_cb(SSL_CONNECTION_GET_SSL(s), &npa, &npalen, |
1506 | sctx->ext.npn_advertised_cb_arg); | |
7da160b0 MC |
1507 | if (ret == SSL_TLSEXT_ERR_OK) { |
1508 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_next_proto_neg) | |
1509 | || !WPACKET_sub_memcpy_u16(pkt, npa, npalen)) { | |
c48ffbcc | 1510 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1511 | return EXT_RETURN_FAIL; |
7da160b0 | 1512 | } |
555cbb32 | 1513 | s->s3.npn_seen = 1; |
7da160b0 MC |
1514 | } |
1515 | ||
b186a592 | 1516 | return EXT_RETURN_SENT; |
7da160b0 MC |
1517 | } |
1518 | #endif | |
1519 | ||
38b051a1 | 1520 | EXT_RETURN tls_construct_stoc_alpn(SSL_CONNECTION *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 1521 | X509 *x, size_t chainidx) |
7da160b0 | 1522 | { |
555cbb32 | 1523 | if (s->s3.alpn_selected == NULL) |
b186a592 | 1524 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1525 | |
1526 | if (!WPACKET_put_bytes_u16(pkt, | |
1527 | TLSEXT_TYPE_application_layer_protocol_negotiation) | |
1528 | || !WPACKET_start_sub_packet_u16(pkt) | |
1529 | || !WPACKET_start_sub_packet_u16(pkt) | |
555cbb32 TS |
1530 | || !WPACKET_sub_memcpy_u8(pkt, s->s3.alpn_selected, |
1531 | s->s3.alpn_selected_len) | |
7da160b0 MC |
1532 | || !WPACKET_close(pkt) |
1533 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1534 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1535 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1536 | } |
1537 | ||
b186a592 | 1538 | return EXT_RETURN_SENT; |
7da160b0 MC |
1539 | } |
1540 | ||
1541 | #ifndef OPENSSL_NO_SRTP | |
38b051a1 | 1542 | EXT_RETURN tls_construct_stoc_use_srtp(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1543 | unsigned int context, X509 *x, |
f63a17d6 | 1544 | size_t chainidx) |
7da160b0 MC |
1545 | { |
1546 | if (s->srtp_profile == NULL) | |
b186a592 | 1547 | return EXT_RETURN_NOT_SENT; |
a1448c26 | 1548 | |
7da160b0 MC |
1549 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp) |
1550 | || !WPACKET_start_sub_packet_u16(pkt) | |
1551 | || !WPACKET_put_bytes_u16(pkt, 2) | |
1552 | || !WPACKET_put_bytes_u16(pkt, s->srtp_profile->id) | |
1553 | || !WPACKET_put_bytes_u8(pkt, 0) | |
1554 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1555 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1556 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1557 | } |
1558 | ||
b186a592 | 1559 | return EXT_RETURN_SENT; |
7da160b0 MC |
1560 | } |
1561 | #endif | |
1562 | ||
38b051a1 TM |
1563 | EXT_RETURN tls_construct_stoc_etm(SSL_CONNECTION *s, WPACKET *pkt, |
1564 | unsigned int context, | |
f63a17d6 | 1565 | X509 *x, size_t chainidx) |
7da160b0 | 1566 | { |
28a31a0a | 1567 | if (!s->ext.use_etm) |
b186a592 | 1568 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1569 | |
1570 | /* | |
1571 | * Don't use encrypt_then_mac if AEAD or RC4 might want to disable | |
1572 | * for other cases too. | |
1573 | */ | |
555cbb32 TS |
1574 | if (s->s3.tmp.new_cipher->algorithm_mac == SSL_AEAD |
1575 | || s->s3.tmp.new_cipher->algorithm_enc == SSL_RC4 | |
1576 | || s->s3.tmp.new_cipher->algorithm_enc == SSL_eGOST2814789CNT | |
5a5530a2 DB |
1577 | || s->s3.tmp.new_cipher->algorithm_enc == SSL_eGOST2814789CNT12 |
1578 | || s->s3.tmp.new_cipher->algorithm_enc == SSL_MAGMA | |
1579 | || s->s3.tmp.new_cipher->algorithm_enc == SSL_KUZNYECHIK) { | |
28a31a0a | 1580 | s->ext.use_etm = 0; |
b186a592 | 1581 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1582 | } |
1583 | ||
1584 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac) | |
1585 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
c48ffbcc | 1586 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1587 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1588 | } |
1589 | ||
b186a592 | 1590 | return EXT_RETURN_SENT; |
7da160b0 MC |
1591 | } |
1592 | ||
38b051a1 TM |
1593 | EXT_RETURN tls_construct_stoc_ems(SSL_CONNECTION *s, WPACKET *pkt, |
1594 | unsigned int context, | |
f63a17d6 | 1595 | X509 *x, size_t chainidx) |
7da160b0 | 1596 | { |
555cbb32 | 1597 | if ((s->s3.flags & TLS1_FLAGS_RECEIVED_EXTMS) == 0) |
b186a592 | 1598 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1599 | |
1600 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret) | |
1601 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
c48ffbcc | 1602 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1603 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1604 | } |
1605 | ||
b186a592 | 1606 | return EXT_RETURN_SENT; |
7da160b0 MC |
1607 | } |
1608 | ||
38b051a1 | 1609 | EXT_RETURN tls_construct_stoc_supported_versions(SSL_CONNECTION *s, WPACKET *pkt, |
88050dd1 MC |
1610 | unsigned int context, X509 *x, |
1611 | size_t chainidx) | |
1612 | { | |
38b051a1 | 1613 | if (!ossl_assert(SSL_CONNECTION_IS_TLS13(s))) { |
c48ffbcc | 1614 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
27e462f1 MC |
1615 | return EXT_RETURN_FAIL; |
1616 | } | |
88050dd1 MC |
1617 | |
1618 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_versions) | |
1619 | || !WPACKET_start_sub_packet_u16(pkt) | |
35e742ec | 1620 | || !WPACKET_put_bytes_u16(pkt, s->version) |
88050dd1 | 1621 | || !WPACKET_close(pkt)) { |
c48ffbcc | 1622 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
88050dd1 MC |
1623 | return EXT_RETURN_FAIL; |
1624 | } | |
1625 | ||
1626 | return EXT_RETURN_SENT; | |
1627 | } | |
1628 | ||
38b051a1 | 1629 | EXT_RETURN tls_construct_stoc_key_share(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1630 | unsigned int context, X509 *x, |
f63a17d6 | 1631 | size_t chainidx) |
7da160b0 | 1632 | { |
3cf96e88 | 1633 | #ifndef OPENSSL_NO_TLS1_3 |
7da160b0 MC |
1634 | unsigned char *encodedPoint; |
1635 | size_t encoded_pt_len = 0; | |
555cbb32 | 1636 | EVP_PKEY *ckey = s->s3.peer_tmp, *skey = NULL; |
8b17fbaf | 1637 | const TLS_GROUP_INFO *ginf = NULL; |
7da160b0 | 1638 | |
dd77962e MC |
1639 | if (s->hello_retry_request == SSL_HRR_PENDING) { |
1640 | if (ckey != NULL) { | |
1641 | /* Original key_share was acceptable so don't ask for another one */ | |
1642 | return EXT_RETURN_NOT_SENT; | |
1643 | } | |
1644 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
1645 | || !WPACKET_start_sub_packet_u16(pkt) | |
16f0e91c | 1646 | || !WPACKET_put_bytes_u16(pkt, s->s3.group_id) |
dd77962e | 1647 | || !WPACKET_close(pkt)) { |
c48ffbcc | 1648 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
dd77962e | 1649 | return EXT_RETURN_FAIL; |
7d061fce MC |
1650 | } |
1651 | ||
dd77962e MC |
1652 | return EXT_RETURN_SENT; |
1653 | } | |
1654 | ||
1655 | if (ckey == NULL) { | |
1656 | /* No key_share received from client - must be resuming */ | |
0247086d | 1657 | if (!s->hit || !tls13_generate_handshake_secret(s, NULL, 0)) { |
c48ffbcc | 1658 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1659 | return EXT_RETURN_FAIL; |
0247086d | 1660 | } |
b186a592 | 1661 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 1662 | } |
b8590b2f | 1663 | |
f2906631 | 1664 | if (s->hit && (s->ext.psk_kex_mode & TLSEXT_KEX_MODE_FLAG_KE_DHE) == 0) { |
e776858b | 1665 | /* |
f2906631 MM |
1666 | * PSK ('hit') and explicitly not doing DHE. If the client sent the |
1667 | * DHE option, we take it by default, except if non-DHE would be | |
1668 | * preferred by config, but this case would have been handled in | |
1669 | * tls_parse_ctos_psk_kex_modes(). | |
e776858b | 1670 | */ |
f2906631 | 1671 | return EXT_RETURN_NOT_SENT; |
e776858b | 1672 | } |
7da160b0 MC |
1673 | |
1674 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
1675 | || !WPACKET_start_sub_packet_u16(pkt) | |
555cbb32 | 1676 | || !WPACKET_put_bytes_u16(pkt, s->s3.group_id)) { |
c48ffbcc | 1677 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1678 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1679 | } |
1680 | ||
38b051a1 TM |
1681 | if ((ginf = tls1_group_id_lookup(SSL_CONNECTION_GET_CTX(s), |
1682 | s->s3.group_id)) == NULL) { | |
c48ffbcc | 1683 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1684 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1685 | } |
1686 | ||
8b17fbaf NT |
1687 | if (!ginf->is_kem) { |
1688 | /* Regular KEX */ | |
1689 | skey = ssl_generate_pkey(s, ckey); | |
1690 | if (skey == NULL) { | |
e077455e | 1691 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_SSL_LIB); |
8b17fbaf NT |
1692 | return EXT_RETURN_FAIL; |
1693 | } | |
7da160b0 | 1694 | |
8b17fbaf | 1695 | /* Generate encoding of server key */ |
5ac8fb58 | 1696 | encoded_pt_len = EVP_PKEY_get1_encoded_public_key(skey, &encodedPoint); |
8b17fbaf | 1697 | if (encoded_pt_len == 0) { |
c48ffbcc | 1698 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EC_LIB); |
8b17fbaf NT |
1699 | EVP_PKEY_free(skey); |
1700 | return EXT_RETURN_FAIL; | |
1701 | } | |
1702 | ||
1703 | if (!WPACKET_sub_memcpy_u16(pkt, encodedPoint, encoded_pt_len) | |
1704 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1705 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
8b17fbaf NT |
1706 | EVP_PKEY_free(skey); |
1707 | OPENSSL_free(encodedPoint); | |
1708 | return EXT_RETURN_FAIL; | |
1709 | } | |
7da160b0 | 1710 | OPENSSL_free(encodedPoint); |
7da160b0 | 1711 | |
8b17fbaf NT |
1712 | /* |
1713 | * This causes the crypto state to be updated based on the derived keys | |
1714 | */ | |
1715 | s->s3.tmp.pkey = skey; | |
1716 | if (ssl_derive(s, skey, ckey, 1) == 0) { | |
1717 | /* SSLfatal() already called */ | |
1718 | return EXT_RETURN_FAIL; | |
1719 | } | |
1720 | } else { | |
1721 | /* KEM mode */ | |
1722 | unsigned char *ct = NULL; | |
1723 | size_t ctlen = 0; | |
1724 | ||
1725 | /* | |
1726 | * This does not update the crypto state. | |
1727 | * | |
1728 | * The generated pms is stored in `s->s3.tmp.pms` to be later used via | |
1729 | * ssl_gensecret(). | |
1730 | */ | |
1731 | if (ssl_encapsulate(s, ckey, &ct, &ctlen, 0) == 0) { | |
1732 | /* SSLfatal() already called */ | |
1733 | return EXT_RETURN_FAIL; | |
1734 | } | |
1735 | ||
1736 | if (ctlen == 0) { | |
c48ffbcc | 1737 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
8b17fbaf NT |
1738 | OPENSSL_free(ct); |
1739 | return EXT_RETURN_FAIL; | |
1740 | } | |
1741 | ||
1742 | if (!WPACKET_sub_memcpy_u16(pkt, ct, ctlen) | |
1743 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1744 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
8b17fbaf NT |
1745 | OPENSSL_free(ct); |
1746 | return EXT_RETURN_FAIL; | |
1747 | } | |
1748 | OPENSSL_free(ct); | |
1749 | ||
1750 | /* | |
1751 | * This causes the crypto state to be updated based on the generated pms | |
1752 | */ | |
1753 | if (ssl_gensecret(s, s->s3.tmp.pms, s->s3.tmp.pmslen) == 0) { | |
1754 | /* SSLfatal() already called */ | |
1755 | return EXT_RETURN_FAIL; | |
1756 | } | |
7da160b0 | 1757 | } |
aa6bd216 | 1758 | s->s3.did_kex = 1; |
b186a592 | 1759 | return EXT_RETURN_SENT; |
1aac20f5 MC |
1760 | #else |
1761 | return EXT_RETURN_FAIL; | |
1762 | #endif | |
7da160b0 MC |
1763 | } |
1764 | ||
38b051a1 TM |
1765 | EXT_RETURN tls_construct_stoc_cookie(SSL_CONNECTION *s, WPACKET *pkt, |
1766 | unsigned int context, | |
43054d3d MC |
1767 | X509 *x, size_t chainidx) |
1768 | { | |
1aac20f5 | 1769 | #ifndef OPENSSL_NO_TLS1_3 |
43054d3d MC |
1770 | unsigned char *hashval1, *hashval2, *appcookie1, *appcookie2, *cookie; |
1771 | unsigned char *hmac, *hmac2; | |
3fa2812f | 1772 | size_t startlen, ciphlen, totcookielen, hashlen, hmaclen, appcookielen; |
43054d3d MC |
1773 | EVP_MD_CTX *hctx; |
1774 | EVP_PKEY *pkey; | |
1775 | int ret = EXT_RETURN_FAIL; | |
38b051a1 TM |
1776 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
1777 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); | |
43054d3d | 1778 | |
555cbb32 | 1779 | if ((s->s3.flags & TLS1_FLAGS_STATELESS) == 0) |
43054d3d MC |
1780 | return EXT_RETURN_NOT_SENT; |
1781 | ||
38b051a1 | 1782 | if (sctx->gen_stateless_cookie_cb == NULL) { |
c48ffbcc | 1783 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_NO_COOKIE_CALLBACK_SET); |
e440f513 MC |
1784 | return EXT_RETURN_FAIL; |
1785 | } | |
1786 | ||
43054d3d MC |
1787 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_cookie) |
1788 | || !WPACKET_start_sub_packet_u16(pkt) | |
1789 | || !WPACKET_start_sub_packet_u16(pkt) | |
1790 | || !WPACKET_get_total_written(pkt, &startlen) | |
1791 | || !WPACKET_reserve_bytes(pkt, MAX_COOKIE_SIZE, &cookie) | |
1792 | || !WPACKET_put_bytes_u16(pkt, COOKIE_STATE_FORMAT_VERSION) | |
1793 | || !WPACKET_put_bytes_u16(pkt, TLS1_3_VERSION) | |
555cbb32 | 1794 | || !WPACKET_put_bytes_u16(pkt, s->s3.group_id) |
38b051a1 TM |
1795 | || !ssl->method->put_cipher_by_char(s->s3.tmp.new_cipher, pkt, |
1796 | &ciphlen) | |
43054d3d | 1797 | /* Is there a key_share extension present in this HRR? */ |
555cbb32 | 1798 | || !WPACKET_put_bytes_u8(pkt, s->s3.peer_tmp == NULL) |
e8a557dc | 1799 | || !WPACKET_put_bytes_u64(pkt, time(NULL)) |
43054d3d MC |
1800 | || !WPACKET_start_sub_packet_u16(pkt) |
1801 | || !WPACKET_reserve_bytes(pkt, EVP_MAX_MD_SIZE, &hashval1)) { | |
c48ffbcc | 1802 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1803 | return EXT_RETURN_FAIL; |
1804 | } | |
1805 | ||
1806 | /* | |
1807 | * Get the hash of the initial ClientHello. ssl_handshake_hash() operates | |
1808 | * on raw buffers, so we first reserve sufficient bytes (above) and then | |
1809 | * subsequently allocate them (below) | |
1810 | */ | |
1811 | if (!ssl3_digest_cached_records(s, 0) | |
1812 | || !ssl_handshake_hash(s, hashval1, EVP_MAX_MD_SIZE, &hashlen)) { | |
1813 | /* SSLfatal() already called */ | |
1814 | return EXT_RETURN_FAIL; | |
1815 | } | |
1816 | ||
1817 | if (!WPACKET_allocate_bytes(pkt, hashlen, &hashval2) | |
1818 | || !ossl_assert(hashval1 == hashval2) | |
1819 | || !WPACKET_close(pkt) | |
1820 | || !WPACKET_start_sub_packet_u8(pkt) | |
1821 | || !WPACKET_reserve_bytes(pkt, SSL_COOKIE_LENGTH, &appcookie1)) { | |
c48ffbcc | 1822 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1823 | return EXT_RETURN_FAIL; |
1824 | } | |
1825 | ||
1826 | /* Generate the application cookie */ | |
38b051a1 TM |
1827 | if (sctx->gen_stateless_cookie_cb(ssl, appcookie1, |
1828 | &appcookielen) == 0) { | |
c48ffbcc | 1829 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_COOKIE_GEN_CALLBACK_FAILURE); |
43054d3d MC |
1830 | return EXT_RETURN_FAIL; |
1831 | } | |
1832 | ||
1833 | if (!WPACKET_allocate_bytes(pkt, appcookielen, &appcookie2) | |
1834 | || !ossl_assert(appcookie1 == appcookie2) | |
1835 | || !WPACKET_close(pkt) | |
1836 | || !WPACKET_get_total_written(pkt, &totcookielen) | |
1837 | || !WPACKET_reserve_bytes(pkt, SHA256_DIGEST_LENGTH, &hmac)) { | |
c48ffbcc | 1838 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1839 | return EXT_RETURN_FAIL; |
1840 | } | |
1841 | hmaclen = SHA256_DIGEST_LENGTH; | |
1842 | ||
1843 | totcookielen -= startlen; | |
1844 | if (!ossl_assert(totcookielen <= MAX_COOKIE_SIZE - SHA256_DIGEST_LENGTH)) { | |
c48ffbcc | 1845 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1846 | return EXT_RETURN_FAIL; |
1847 | } | |
1848 | ||
1849 | /* HMAC the cookie */ | |
1850 | hctx = EVP_MD_CTX_create(); | |
38b051a1 TM |
1851 | pkey = EVP_PKEY_new_raw_private_key_ex(sctx->libctx, "HMAC", |
1852 | sctx->propq, | |
d8652be0 MC |
1853 | s->session_ctx->ext.cookie_hmac_key, |
1854 | sizeof(s->session_ctx->ext.cookie_hmac_key)); | |
43054d3d | 1855 | if (hctx == NULL || pkey == NULL) { |
e077455e | 1856 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
43054d3d MC |
1857 | goto err; |
1858 | } | |
1859 | ||
38b051a1 TM |
1860 | if (EVP_DigestSignInit_ex(hctx, NULL, "SHA2-256", sctx->libctx, |
1861 | sctx->propq, pkey, NULL) <= 0 | |
43054d3d MC |
1862 | || EVP_DigestSign(hctx, hmac, &hmaclen, cookie, |
1863 | totcookielen) <= 0) { | |
c48ffbcc | 1864 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1865 | goto err; |
1866 | } | |
1867 | ||
1868 | if (!ossl_assert(totcookielen + hmaclen <= MAX_COOKIE_SIZE)) { | |
c48ffbcc | 1869 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1870 | goto err; |
1871 | } | |
1872 | ||
1873 | if (!WPACKET_allocate_bytes(pkt, hmaclen, &hmac2) | |
1874 | || !ossl_assert(hmac == hmac2) | |
1875 | || !ossl_assert(cookie == hmac - totcookielen) | |
1876 | || !WPACKET_close(pkt) | |
1877 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1878 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1879 | goto err; |
1880 | } | |
1881 | ||
1882 | ret = EXT_RETURN_SENT; | |
1883 | ||
1884 | err: | |
1885 | EVP_MD_CTX_free(hctx); | |
1886 | EVP_PKEY_free(pkey); | |
1887 | return ret; | |
1aac20f5 MC |
1888 | #else |
1889 | return EXT_RETURN_FAIL; | |
1890 | #endif | |
43054d3d MC |
1891 | } |
1892 | ||
38b051a1 | 1893 | EXT_RETURN tls_construct_stoc_cryptopro_bug(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1894 | unsigned int context, X509 *x, |
f63a17d6 | 1895 | size_t chainidx) |
7da160b0 MC |
1896 | { |
1897 | const unsigned char cryptopro_ext[36] = { | |
1898 | 0xfd, 0xe8, /* 65000 */ | |
1899 | 0x00, 0x20, /* 32 bytes length */ | |
1900 | 0x30, 0x1e, 0x30, 0x08, 0x06, 0x06, 0x2a, 0x85, | |
1901 | 0x03, 0x02, 0x02, 0x09, 0x30, 0x08, 0x06, 0x06, | |
1902 | 0x2a, 0x85, 0x03, 0x02, 0x02, 0x16, 0x30, 0x08, | |
1903 | 0x06, 0x06, 0x2a, 0x85, 0x03, 0x02, 0x02, 0x17 | |
1904 | }; | |
1905 | ||
555cbb32 TS |
1906 | if (((s->s3.tmp.new_cipher->id & 0xFFFF) != 0x80 |
1907 | && (s->s3.tmp.new_cipher->id & 0xFFFF) != 0x81) | |
38b051a1 TM |
1908 | || (SSL_get_options(SSL_CONNECTION_GET_SSL(s)) |
1909 | & SSL_OP_CRYPTOPRO_TLSEXT_BUG) == 0) | |
b186a592 | 1910 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1911 | |
1912 | if (!WPACKET_memcpy(pkt, cryptopro_ext, sizeof(cryptopro_ext))) { | |
c48ffbcc | 1913 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1914 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1915 | } |
1916 | ||
b186a592 | 1917 | return EXT_RETURN_SENT; |
7da160b0 | 1918 | } |
0247086d | 1919 | |
38b051a1 | 1920 | EXT_RETURN tls_construct_stoc_early_data(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1921 | unsigned int context, X509 *x, |
f63a17d6 | 1922 | size_t chainidx) |
38df5a45 | 1923 | { |
fe874d27 | 1924 | if (context == SSL_EXT_TLS1_3_NEW_SESSION_TICKET) { |
6594189f | 1925 | if (s->max_early_data == 0) |
b186a592 | 1926 | return EXT_RETURN_NOT_SENT; |
6594189f MC |
1927 | |
1928 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) | |
1929 | || !WPACKET_start_sub_packet_u16(pkt) | |
1930 | || !WPACKET_put_bytes_u32(pkt, s->max_early_data) | |
1931 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1932 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1933 | return EXT_RETURN_FAIL; |
6594189f MC |
1934 | } |
1935 | ||
b186a592 | 1936 | return EXT_RETURN_SENT; |
6594189f MC |
1937 | } |
1938 | ||
38df5a45 | 1939 | if (s->ext.early_data != SSL_EARLY_DATA_ACCEPTED) |
b186a592 | 1940 | return EXT_RETURN_NOT_SENT; |
38df5a45 MC |
1941 | |
1942 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) | |
1943 | || !WPACKET_start_sub_packet_u16(pkt) | |
1944 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1945 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1946 | return EXT_RETURN_FAIL; |
38df5a45 MC |
1947 | } |
1948 | ||
b186a592 | 1949 | return EXT_RETURN_SENT; |
38df5a45 MC |
1950 | } |
1951 | ||
38b051a1 TM |
1952 | EXT_RETURN tls_construct_stoc_psk(SSL_CONNECTION *s, WPACKET *pkt, |
1953 | unsigned int context, | |
f63a17d6 | 1954 | X509 *x, size_t chainidx) |
0247086d MC |
1955 | { |
1956 | if (!s->hit) | |
b186a592 | 1957 | return EXT_RETURN_NOT_SENT; |
0247086d MC |
1958 | |
1959 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk) | |
1960 | || !WPACKET_start_sub_packet_u16(pkt) | |
c96ce52c | 1961 | || !WPACKET_put_bytes_u16(pkt, s->ext.tick_identity) |
0247086d | 1962 | || !WPACKET_close(pkt)) { |
c48ffbcc | 1963 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1964 | return EXT_RETURN_FAIL; |
0247086d MC |
1965 | } |
1966 | ||
b186a592 | 1967 | return EXT_RETURN_SENT; |
0247086d | 1968 | } |
3c95ef22 TS |
1969 | |
1970 | EXT_RETURN tls_construct_stoc_client_cert_type(SSL_CONNECTION *sc, WPACKET *pkt, | |
1971 | unsigned int context, | |
1972 | X509 *x, size_t chainidx) | |
1973 | { | |
1974 | if (sc->ext.client_cert_type_ctos == OSSL_CERT_TYPE_CTOS_ERROR | |
1975 | && (send_certificate_request(sc) | |
1976 | || sc->post_handshake_auth == SSL_PHA_EXT_RECEIVED)) { | |
1977 | /* Did not receive an acceptable cert type - and doing client auth */ | |
1978 | SSLfatal(sc, SSL_AD_UNSUPPORTED_CERTIFICATE, SSL_R_BAD_EXTENSION); | |
1979 | return EXT_RETURN_FAIL; | |
1980 | } | |
1981 | ||
1982 | if (sc->ext.client_cert_type == TLSEXT_cert_type_x509) { | |
1983 | sc->ext.client_cert_type_ctos = OSSL_CERT_TYPE_CTOS_NONE; | |
1984 | return EXT_RETURN_NOT_SENT; | |
1985 | } | |
1986 | ||
1987 | /* | |
1988 | * Note: only supposed to send this if we are going to do a cert request, | |
1989 | * but TLSv1.3 could do a PHA request if the client supports it | |
1990 | */ | |
1991 | if ((!send_certificate_request(sc) && sc->post_handshake_auth != SSL_PHA_EXT_RECEIVED) | |
1992 | || sc->ext.client_cert_type_ctos != OSSL_CERT_TYPE_CTOS_GOOD | |
1993 | || sc->client_cert_type == NULL) { | |
1994 | /* if we don't send it, reset to TLSEXT_cert_type_x509 */ | |
1995 | sc->ext.client_cert_type_ctos = OSSL_CERT_TYPE_CTOS_NONE; | |
1996 | sc->ext.client_cert_type = TLSEXT_cert_type_x509; | |
1997 | return EXT_RETURN_NOT_SENT; | |
1998 | } | |
1999 | ||
2000 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_client_cert_type) | |
2001 | || !WPACKET_start_sub_packet_u16(pkt) | |
2002 | || !WPACKET_put_bytes_u8(pkt, sc->ext.client_cert_type) | |
2003 | || !WPACKET_close(pkt)) { | |
2004 | SSLfatal(sc, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
2005 | return EXT_RETURN_FAIL; | |
2006 | } | |
2007 | return EXT_RETURN_SENT; | |
2008 | } | |
2009 | ||
2010 | /* One of |pref|, |other| is configured and the values are sanitized */ | |
2011 | static int reconcile_cert_type(const unsigned char *pref, size_t pref_len, | |
2012 | const unsigned char *other, size_t other_len, | |
2013 | uint8_t *chosen_cert_type) | |
2014 | { | |
2015 | size_t i; | |
2016 | ||
2017 | for (i = 0; i < pref_len; i++) { | |
2018 | if (memchr(other, pref[i], other_len) != NULL) { | |
2019 | *chosen_cert_type = pref[i]; | |
2020 | return OSSL_CERT_TYPE_CTOS_GOOD; | |
2021 | } | |
2022 | } | |
2023 | return OSSL_CERT_TYPE_CTOS_ERROR; | |
2024 | } | |
2025 | ||
2026 | int tls_parse_ctos_client_cert_type(SSL_CONNECTION *sc, PACKET *pkt, | |
2027 | unsigned int context, | |
2028 | X509 *x, size_t chainidx) | |
2029 | { | |
2030 | PACKET supported_cert_types; | |
2031 | const unsigned char *data; | |
2032 | size_t len; | |
2033 | ||
2034 | /* Ignore the extension */ | |
2035 | if (sc->client_cert_type == NULL) { | |
2036 | sc->ext.client_cert_type_ctos = OSSL_CERT_TYPE_CTOS_NONE; | |
2037 | sc->ext.client_cert_type = TLSEXT_cert_type_x509; | |
2038 | return 1; | |
2039 | } | |
2040 | ||
2041 | if (!PACKET_as_length_prefixed_1(pkt, &supported_cert_types)) { | |
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 ((len = PACKET_remaining(&supported_cert_types)) == 0) { | |
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 | if (!PACKET_get_bytes(&supported_cert_types, &data, len)) { | |
2052 | sc->ext.client_cert_type_ctos = OSSL_CERT_TYPE_CTOS_ERROR; | |
2053 | SSLfatal(sc, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); | |
2054 | return 0; | |
2055 | } | |
2056 | /* client_cert_type: client (peer) has priority */ | |
2057 | sc->ext.client_cert_type_ctos = reconcile_cert_type(data, len, | |
2058 | sc->client_cert_type, sc->client_cert_type_len, | |
2059 | &sc->ext.client_cert_type); | |
2060 | ||
2061 | /* Ignore the error until sending - so we can check cert auth*/ | |
2062 | return 1; | |
2063 | } | |
2064 | ||
2065 | EXT_RETURN tls_construct_stoc_server_cert_type(SSL_CONNECTION *sc, WPACKET *pkt, | |
2066 | unsigned int context, | |
2067 | X509 *x, size_t chainidx) | |
2068 | { | |
2069 | if (sc->ext.server_cert_type == TLSEXT_cert_type_x509) { | |
2070 | sc->ext.server_cert_type_ctos = OSSL_CERT_TYPE_CTOS_NONE; | |
2071 | return EXT_RETURN_NOT_SENT; | |
2072 | } | |
2073 | if (sc->ext.server_cert_type_ctos != OSSL_CERT_TYPE_CTOS_GOOD | |
2074 | || sc->server_cert_type == NULL) { | |
2075 | /* if we don't send it, reset to TLSEXT_cert_type_x509 */ | |
2076 | sc->ext.server_cert_type_ctos = OSSL_CERT_TYPE_CTOS_NONE; | |
2077 | sc->ext.server_cert_type = TLSEXT_cert_type_x509; | |
2078 | return EXT_RETURN_NOT_SENT; | |
2079 | } | |
2080 | ||
2081 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_server_cert_type) | |
2082 | || !WPACKET_start_sub_packet_u16(pkt) | |
2083 | || !WPACKET_put_bytes_u8(pkt, sc->ext.server_cert_type) | |
2084 | || !WPACKET_close(pkt)) { | |
2085 | SSLfatal(sc, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
2086 | return EXT_RETURN_FAIL; | |
2087 | } | |
2088 | return EXT_RETURN_SENT; | |
2089 | } | |
2090 | ||
2091 | int tls_parse_ctos_server_cert_type(SSL_CONNECTION *sc, PACKET *pkt, | |
2092 | unsigned int context, | |
2093 | X509 *x, size_t chainidx) | |
2094 | { | |
2095 | PACKET supported_cert_types; | |
2096 | const unsigned char *data; | |
2097 | size_t len; | |
2098 | ||
2099 | /* Ignore the extension */ | |
2100 | if (sc->server_cert_type == NULL) { | |
2101 | sc->ext.server_cert_type_ctos = OSSL_CERT_TYPE_CTOS_NONE; | |
2102 | sc->ext.server_cert_type = TLSEXT_cert_type_x509; | |
2103 | return 1; | |
2104 | } | |
2105 | ||
2106 | if (!PACKET_as_length_prefixed_1(pkt, &supported_cert_types)) { | |
2107 | SSLfatal(sc, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); | |
2108 | return 0; | |
2109 | } | |
2110 | ||
2111 | if ((len = PACKET_remaining(&supported_cert_types)) == 0) { | |
2112 | SSLfatal(sc, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); | |
2113 | return 0; | |
2114 | } | |
2115 | if (!PACKET_get_bytes(&supported_cert_types, &data, len)) { | |
2116 | SSLfatal(sc, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); | |
2117 | return 0; | |
2118 | } | |
2119 | /* server_cert_type: server (this) has priority */ | |
2120 | sc->ext.server_cert_type_ctos = reconcile_cert_type(sc->server_cert_type, sc->server_cert_type_len, | |
2121 | data, len, | |
2122 | &sc->ext.server_cert_type); | |
2123 | if (sc->ext.server_cert_type_ctos == OSSL_CERT_TYPE_CTOS_GOOD) | |
2124 | return 1; | |
2125 | ||
2126 | /* Did not receive an acceptable cert type */ | |
2127 | SSLfatal(sc, SSL_AD_UNSUPPORTED_CERTIFICATE, SSL_R_BAD_EXTENSION); | |
2128 | return 0; | |
2129 | } |