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25670f3e | 1 | /* |
33388b44 | 2 | * Copyright 2016-2020 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 | ||
15 | #define COOKIE_STATE_FORMAT_VERSION 0 | |
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 | |
d0debc0a MC |
20 | * key_share present flag, 4 bytes for timestamp, 2 bytes for the hashlen, |
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 | */ |
d0debc0a | 24 | #define MAX_COOKIE_SIZE (2 + 2 + 2 + 2 + 2 + 1 + 4 + 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 | */ | |
61138358 | 41 | int tls_parse_ctos_renegotiate(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 42 | X509 *x, size_t chainidx) |
25670f3e MC |
43 | { |
44 | unsigned int ilen; | |
45 | const unsigned char *data; | |
46 | ||
47 | /* Parse the length byte */ | |
48 | if (!PACKET_get_1(pkt, &ilen) | |
49 | || !PACKET_get_bytes(pkt, &data, ilen)) { | |
c48ffbcc | 50 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_RENEGOTIATION_ENCODING_ERR); |
25670f3e MC |
51 | return 0; |
52 | } | |
53 | ||
54 | /* Check that the extension matches */ | |
555cbb32 | 55 | if (ilen != s->s3.previous_client_finished_len) { |
c48ffbcc | 56 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_RENEGOTIATION_MISMATCH); |
25670f3e MC |
57 | return 0; |
58 | } | |
59 | ||
555cbb32 TS |
60 | if (memcmp(data, s->s3.previous_client_finished, |
61 | s->s3.previous_client_finished_len)) { | |
c48ffbcc | 62 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_RENEGOTIATION_MISMATCH); |
25670f3e MC |
63 | return 0; |
64 | } | |
65 | ||
555cbb32 | 66 | s->s3.send_connection_binding = 1; |
25670f3e MC |
67 | |
68 | return 1; | |
69 | } | |
70 | ||
1266eefd MC |
71 | /*- |
72 | * The servername extension is treated as follows: | |
73 | * | |
74 | * - Only the hostname type is supported with a maximum length of 255. | |
75 | * - The servername is rejected if too long or if it contains zeros, | |
76 | * in which case an fatal alert is generated. | |
77 | * - The servername field is maintained together with the session cache. | |
78 | * - When a session is resumed, the servername call back invoked in order | |
79 | * to allow the application to position itself to the right context. | |
80 | * - The servername is acknowledged if it is new for a session or when | |
81 | * it is identical to a previously used for the same session. | |
82 | * Applications can control the behaviour. They can at any time | |
83 | * set a 'desirable' servername for a new SSL object. This can be the | |
84 | * case for example with HTTPS when a Host: header field is received and | |
85 | * a renegotiation is requested. In this case, a possible servername | |
86 | * presented in the new client hello is only acknowledged if it matches | |
87 | * the value of the Host: field. | |
88 | * - Applications must use SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION | |
89 | * if they provide for changing an explicit servername context for the | |
90 | * session, i.e. when the session has been established with a servername | |
91 | * extension. | |
92 | * - On session reconnect, the servername extension may be absent. | |
93 | */ | |
61138358 | 94 | int tls_parse_ctos_server_name(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 95 | X509 *x, size_t chainidx) |
25670f3e MC |
96 | { |
97 | unsigned int servname_type; | |
98 | PACKET sni, hostname; | |
99 | ||
25670f3e MC |
100 | if (!PACKET_as_length_prefixed_2(pkt, &sni) |
101 | /* ServerNameList must be at least 1 byte long. */ | |
102 | || PACKET_remaining(&sni) == 0) { | |
c48ffbcc | 103 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
104 | return 0; |
105 | } | |
106 | ||
107 | /* | |
44e69951 F |
108 | * Although the intent was for server_name to be extensible, RFC 4366 |
109 | * was not clear about it; and so OpenSSL among other implementations, | |
110 | * always and only allows a 'host_name' name types. | |
25670f3e MC |
111 | * RFC 6066 corrected the mistake but adding new name types |
112 | * is nevertheless no longer feasible, so act as if no other | |
113 | * SNI types can exist, to simplify parsing. | |
114 | * | |
115 | * Also note that the RFC permits only one SNI value per type, | |
116 | * i.e., we can only have a single hostname. | |
117 | */ | |
118 | if (!PACKET_get_1(&sni, &servname_type) | |
119 | || servname_type != TLSEXT_NAMETYPE_host_name | |
120 | || !PACKET_as_length_prefixed_2(&sni, &hostname)) { | |
c48ffbcc | 121 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
122 | return 0; |
123 | } | |
124 | ||
7955c1f1 MC |
125 | /* |
126 | * In TLSv1.2 and below the SNI is associated with the session. In TLSv1.3 | |
127 | * we always use the SNI value from the handshake. | |
128 | */ | |
1c4aa31d | 129 | if (!s->hit || SSL_IS_TLS13(s)) { |
25670f3e | 130 | if (PACKET_remaining(&hostname) > TLSEXT_MAXLEN_host_name) { |
c48ffbcc | 131 | SSLfatal(s, SSL_AD_UNRECOGNIZED_NAME, SSL_R_BAD_EXTENSION); |
25670f3e MC |
132 | return 0; |
133 | } | |
134 | ||
135 | if (PACKET_contains_zero_byte(&hostname)) { | |
c48ffbcc | 136 | SSLfatal(s, SSL_AD_UNRECOGNIZED_NAME, SSL_R_BAD_EXTENSION); |
25670f3e MC |
137 | return 0; |
138 | } | |
139 | ||
1c4aa31d BK |
140 | /* |
141 | * Store the requested SNI in the SSL as temporary storage. | |
142 | * If we accept it, it will get stored in the SSL_SESSION as well. | |
143 | */ | |
144 | OPENSSL_free(s->ext.hostname); | |
145 | s->ext.hostname = NULL; | |
146 | if (!PACKET_strndup(&hostname, &s->ext.hostname)) { | |
c48ffbcc | 147 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
148 | return 0; |
149 | } | |
150 | ||
151 | s->servername_done = 1; | |
7955c1f1 MC |
152 | } else { |
153 | /* | |
154 | * In TLSv1.2 and below we should check if the SNI is consistent between | |
155 | * the initial handshake and the resumption. In TLSv1.3 SNI is not | |
156 | * associated with the session. | |
157 | */ | |
25670f3e MC |
158 | /* |
159 | * TODO(openssl-team): if the SNI doesn't match, we MUST | |
160 | * fall back to a full handshake. | |
161 | */ | |
1c4aa31d | 162 | s->servername_done = (s->session->ext.hostname != NULL) |
aff8c126 RS |
163 | && PACKET_equal(&hostname, s->session->ext.hostname, |
164 | strlen(s->session->ext.hostname)); | |
25670f3e MC |
165 | } |
166 | ||
167 | return 1; | |
168 | } | |
169 | ||
cf72c757 | 170 | int tls_parse_ctos_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 171 | X509 *x, size_t chainidx) |
cf72c757 F |
172 | { |
173 | unsigned int value; | |
174 | ||
175 | if (PACKET_remaining(pkt) != 1 || !PACKET_get_1(pkt, &value)) { | |
c48ffbcc | 176 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
cf72c757 F |
177 | return 0; |
178 | } | |
179 | ||
180 | /* Received |value| should be a valid max-fragment-length code. */ | |
181 | if (!IS_MAX_FRAGMENT_LENGTH_EXT_VALID(value)) { | |
f63a17d6 | 182 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 | 183 | SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); |
cf72c757 F |
184 | return 0; |
185 | } | |
186 | ||
187 | /* | |
188 | * RFC 6066: The negotiated length applies for the duration of the session | |
189 | * including session resumptions. | |
190 | * We should receive the same code as in resumed session ! | |
191 | */ | |
192 | if (s->hit && s->session->ext.max_fragment_len_mode != value) { | |
f63a17d6 | 193 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 | 194 | SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); |
cf72c757 F |
195 | return 0; |
196 | } | |
197 | ||
198 | /* | |
199 | * Store it in session, so it'll become binding for us | |
200 | * and we'll include it in a next Server Hello. | |
201 | */ | |
202 | s->session->ext.max_fragment_len_mode = value; | |
203 | return 1; | |
204 | } | |
205 | ||
25670f3e | 206 | #ifndef OPENSSL_NO_SRP |
61138358 | 207 | int tls_parse_ctos_srp(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 208 | size_t chainidx) |
25670f3e MC |
209 | { |
210 | PACKET srp_I; | |
211 | ||
212 | if (!PACKET_as_length_prefixed_1(pkt, &srp_I) | |
213 | || PACKET_contains_zero_byte(&srp_I)) { | |
c48ffbcc | 214 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
215 | return 0; |
216 | } | |
217 | ||
218 | /* | |
219 | * TODO(openssl-team): currently, we re-authenticate the user | |
220 | * upon resumption. Instead, we MUST ignore the login. | |
221 | */ | |
222 | if (!PACKET_strndup(&srp_I, &s->srp_ctx.login)) { | |
c48ffbcc | 223 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
224 | return 0; |
225 | } | |
226 | ||
227 | return 1; | |
228 | } | |
229 | #endif | |
230 | ||
61138358 | 231 | int tls_parse_ctos_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 232 | X509 *x, size_t chainidx) |
25670f3e MC |
233 | { |
234 | PACKET ec_point_format_list; | |
235 | ||
236 | if (!PACKET_as_length_prefixed_1(pkt, &ec_point_format_list) | |
237 | || PACKET_remaining(&ec_point_format_list) == 0) { | |
c48ffbcc | 238 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
239 | return 0; |
240 | } | |
241 | ||
242 | if (!s->hit) { | |
243 | if (!PACKET_memdup(&ec_point_format_list, | |
cd0fb43c MC |
244 | &s->ext.peer_ecpointformats, |
245 | &s->ext.peer_ecpointformats_len)) { | |
c48ffbcc | 246 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
247 | return 0; |
248 | } | |
249 | } | |
250 | ||
251 | return 1; | |
252 | } | |
25670f3e | 253 | |
61138358 | 254 | int tls_parse_ctos_session_ticket(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 255 | X509 *x, size_t chainidx) |
25670f3e | 256 | { |
aff8c126 RS |
257 | if (s->ext.session_ticket_cb && |
258 | !s->ext.session_ticket_cb(s, PACKET_data(pkt), | |
259 | PACKET_remaining(pkt), | |
260 | s->ext.session_ticket_cb_arg)) { | |
c48ffbcc | 261 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
262 | return 0; |
263 | } | |
264 | ||
265 | return 1; | |
266 | } | |
267 | ||
a7e6a3d8 P |
268 | int tls_parse_ctos_sig_algs_cert(SSL *s, PACKET *pkt, |
269 | ossl_unused unsigned int context, | |
270 | ossl_unused X509 *x, | |
271 | ossl_unused size_t chainidx) | |
c589c34e BK |
272 | { |
273 | PACKET supported_sig_algs; | |
274 | ||
275 | if (!PACKET_as_length_prefixed_2(pkt, &supported_sig_algs) | |
276 | || PACKET_remaining(&supported_sig_algs) == 0) { | |
c48ffbcc | 277 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
c589c34e BK |
278 | return 0; |
279 | } | |
280 | ||
281 | if (!s->hit && !tls1_save_sigalgs(s, &supported_sig_algs, 1)) { | |
c48ffbcc | 282 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
c589c34e BK |
283 | return 0; |
284 | } | |
285 | ||
286 | return 1; | |
287 | } | |
288 | ||
61138358 | 289 | int tls_parse_ctos_sig_algs(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 290 | size_t chainidx) |
25670f3e MC |
291 | { |
292 | PACKET supported_sig_algs; | |
293 | ||
294 | if (!PACKET_as_length_prefixed_2(pkt, &supported_sig_algs) | |
25670f3e | 295 | || PACKET_remaining(&supported_sig_algs) == 0) { |
c48ffbcc | 296 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
297 | return 0; |
298 | } | |
299 | ||
c589c34e | 300 | if (!s->hit && !tls1_save_sigalgs(s, &supported_sig_algs, 0)) { |
c48ffbcc | 301 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
302 | return 0; |
303 | } | |
304 | ||
305 | return 1; | |
306 | } | |
307 | ||
ab83e314 | 308 | #ifndef OPENSSL_NO_OCSP |
61138358 | 309 | int tls_parse_ctos_status_request(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 310 | X509 *x, size_t chainidx) |
25670f3e | 311 | { |
1266eefd MC |
312 | PACKET responder_id_list, exts; |
313 | ||
ded4a83d MC |
314 | /* We ignore this in a resumption handshake */ |
315 | if (s->hit) | |
316 | return 1; | |
317 | ||
e96e0f8e MC |
318 | /* Not defined if we get one of these in a client Certificate */ |
319 | if (x != NULL) | |
320 | return 1; | |
321 | ||
aff8c126 | 322 | if (!PACKET_get_1(pkt, (unsigned int *)&s->ext.status_type)) { |
c48ffbcc | 323 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
324 | return 0; |
325 | } | |
ab83e314 | 326 | |
aff8c126 | 327 | if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) { |
25670f3e | 328 | /* |
1266eefd | 329 | * We don't know what to do with any other type so ignore it. |
25670f3e | 330 | */ |
aff8c126 | 331 | s->ext.status_type = TLSEXT_STATUSTYPE_nothing; |
1266eefd MC |
332 | return 1; |
333 | } | |
25670f3e | 334 | |
1266eefd | 335 | if (!PACKET_get_length_prefixed_2 (pkt, &responder_id_list)) { |
c48ffbcc | 336 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1266eefd MC |
337 | return 0; |
338 | } | |
25670f3e | 339 | |
1266eefd MC |
340 | /* |
341 | * We remove any OCSP_RESPIDs from a previous handshake | |
342 | * to prevent unbounded memory growth - CVE-2016-6304 | |
343 | */ | |
aff8c126 | 344 | sk_OCSP_RESPID_pop_free(s->ext.ocsp.ids, OCSP_RESPID_free); |
1266eefd | 345 | if (PACKET_remaining(&responder_id_list) > 0) { |
aff8c126 RS |
346 | s->ext.ocsp.ids = sk_OCSP_RESPID_new_null(); |
347 | if (s->ext.ocsp.ids == NULL) { | |
c48ffbcc | 348 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); |
1266eefd MC |
349 | return 0; |
350 | } | |
351 | } else { | |
aff8c126 | 352 | s->ext.ocsp.ids = NULL; |
1266eefd | 353 | } |
25670f3e | 354 | |
1266eefd MC |
355 | while (PACKET_remaining(&responder_id_list) > 0) { |
356 | OCSP_RESPID *id; | |
357 | PACKET responder_id; | |
358 | const unsigned char *id_data; | |
25670f3e | 359 | |
1266eefd MC |
360 | if (!PACKET_get_length_prefixed_2(&responder_id_list, &responder_id) |
361 | || PACKET_remaining(&responder_id) == 0) { | |
c48ffbcc | 362 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1266eefd MC |
363 | return 0; |
364 | } | |
25670f3e | 365 | |
1266eefd MC |
366 | id_data = PACKET_data(&responder_id); |
367 | /* TODO(size_t): Convert d2i_* to size_t */ | |
368 | id = d2i_OCSP_RESPID(NULL, &id_data, | |
369 | (int)PACKET_remaining(&responder_id)); | |
370 | if (id == NULL) { | |
c48ffbcc | 371 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1266eefd | 372 | return 0; |
25670f3e MC |
373 | } |
374 | ||
1266eefd MC |
375 | if (id_data != PACKET_end(&responder_id)) { |
376 | OCSP_RESPID_free(id); | |
c48ffbcc | 377 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
f63a17d6 | 378 | |
25670f3e MC |
379 | return 0; |
380 | } | |
381 | ||
aff8c126 | 382 | if (!sk_OCSP_RESPID_push(s->ext.ocsp.ids, id)) { |
1266eefd | 383 | OCSP_RESPID_free(id); |
c48ffbcc | 384 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f63a17d6 | 385 | |
1266eefd MC |
386 | return 0; |
387 | } | |
388 | } | |
389 | ||
390 | /* Read in request_extensions */ | |
391 | if (!PACKET_as_length_prefixed_2(pkt, &exts)) { | |
c48ffbcc | 392 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1266eefd MC |
393 | return 0; |
394 | } | |
395 | ||
396 | if (PACKET_remaining(&exts) > 0) { | |
397 | const unsigned char *ext_data = PACKET_data(&exts); | |
398 | ||
aff8c126 | 399 | sk_X509_EXTENSION_pop_free(s->ext.ocsp.exts, |
1266eefd | 400 | X509_EXTENSION_free); |
aff8c126 | 401 | s->ext.ocsp.exts = |
1266eefd | 402 | d2i_X509_EXTENSIONS(NULL, &ext_data, (int)PACKET_remaining(&exts)); |
aff8c126 | 403 | if (s->ext.ocsp.exts == NULL || ext_data != PACKET_end(&exts)) { |
c48ffbcc | 404 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1266eefd | 405 | return 0; |
25670f3e | 406 | } |
25670f3e MC |
407 | } |
408 | ||
409 | return 1; | |
410 | } | |
ab83e314 | 411 | #endif |
25670f3e MC |
412 | |
413 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
61138358 | 414 | int tls_parse_ctos_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 415 | size_t chainidx) |
25670f3e | 416 | { |
1266eefd MC |
417 | /* |
418 | * We shouldn't accept this extension on a | |
419 | * renegotiation. | |
1266eefd | 420 | */ |
c7f47786 | 421 | if (SSL_IS_FIRST_HANDSHAKE(s)) |
555cbb32 | 422 | s->s3.npn_seen = 1; |
25670f3e MC |
423 | |
424 | return 1; | |
425 | } | |
426 | #endif | |
427 | ||
428 | /* | |
1266eefd | 429 | * Save the ALPN extension in a ClientHello.|pkt| holds the contents of the ALPN |
29bfd5b7 | 430 | * extension, not including type and length. Returns: 1 on success, 0 on error. |
25670f3e | 431 | */ |
61138358 | 432 | int tls_parse_ctos_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 433 | size_t chainidx) |
25670f3e MC |
434 | { |
435 | PACKET protocol_list, save_protocol_list, protocol; | |
436 | ||
c7f47786 | 437 | if (!SSL_IS_FIRST_HANDSHAKE(s)) |
25670f3e MC |
438 | return 1; |
439 | ||
440 | if (!PACKET_as_length_prefixed_2(pkt, &protocol_list) | |
441 | || PACKET_remaining(&protocol_list) < 2) { | |
c48ffbcc | 442 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
443 | return 0; |
444 | } | |
445 | ||
446 | save_protocol_list = protocol_list; | |
447 | do { | |
448 | /* Protocol names can't be empty. */ | |
449 | if (!PACKET_get_length_prefixed_1(&protocol_list, &protocol) | |
450 | || PACKET_remaining(&protocol) == 0) { | |
c48ffbcc | 451 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
452 | return 0; |
453 | } | |
454 | } while (PACKET_remaining(&protocol_list) != 0); | |
455 | ||
555cbb32 TS |
456 | OPENSSL_free(s->s3.alpn_proposed); |
457 | s->s3.alpn_proposed = NULL; | |
458 | s->s3.alpn_proposed_len = 0; | |
25670f3e | 459 | if (!PACKET_memdup(&save_protocol_list, |
555cbb32 | 460 | &s->s3.alpn_proposed, &s->s3.alpn_proposed_len)) { |
c48ffbcc | 461 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
462 | return 0; |
463 | } | |
464 | ||
465 | return 1; | |
466 | } | |
467 | ||
468 | #ifndef OPENSSL_NO_SRTP | |
61138358 | 469 | int tls_parse_ctos_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 470 | size_t chainidx) |
25670f3e | 471 | { |
25670f3e MC |
472 | STACK_OF(SRTP_PROTECTION_PROFILE) *srvr; |
473 | unsigned int ct, mki_len, id; | |
474 | int i, srtp_pref; | |
475 | PACKET subpkt; | |
476 | ||
477 | /* Ignore this if we have no SRTP profiles */ | |
478 | if (SSL_get_srtp_profiles(s) == NULL) | |
479 | return 1; | |
480 | ||
481 | /* Pull off the length of the cipher suite list and check it is even */ | |
1266eefd MC |
482 | if (!PACKET_get_net_2(pkt, &ct) || (ct & 1) != 0 |
483 | || !PACKET_get_sub_packet(pkt, &subpkt, ct)) { | |
c48ffbcc | 484 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
25670f3e | 485 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
25670f3e MC |
486 | return 0; |
487 | } | |
488 | ||
489 | srvr = SSL_get_srtp_profiles(s); | |
490 | s->srtp_profile = NULL; | |
491 | /* Search all profiles for a match initially */ | |
492 | srtp_pref = sk_SRTP_PROTECTION_PROFILE_num(srvr); | |
493 | ||
494 | while (PACKET_remaining(&subpkt)) { | |
495 | if (!PACKET_get_net_2(&subpkt, &id)) { | |
c48ffbcc | 496 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
f63a17d6 | 497 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
25670f3e MC |
498 | return 0; |
499 | } | |
500 | ||
501 | /* | |
502 | * Only look for match in profiles of higher preference than | |
503 | * current match. | |
504 | * If no profiles have been have been configured then this | |
505 | * does nothing. | |
506 | */ | |
507 | for (i = 0; i < srtp_pref; i++) { | |
d270de32 | 508 | SRTP_PROTECTION_PROFILE *sprof = |
1266eefd MC |
509 | sk_SRTP_PROTECTION_PROFILE_value(srvr, i); |
510 | ||
25670f3e MC |
511 | if (sprof->id == id) { |
512 | s->srtp_profile = sprof; | |
513 | srtp_pref = i; | |
514 | break; | |
515 | } | |
516 | } | |
517 | } | |
518 | ||
1266eefd | 519 | /* Now extract the MKI value as a sanity check, but discard it for now */ |
25670f3e | 520 | if (!PACKET_get_1(pkt, &mki_len)) { |
c48ffbcc | 521 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
f63a17d6 | 522 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
25670f3e MC |
523 | return 0; |
524 | } | |
525 | ||
526 | if (!PACKET_forward(pkt, mki_len) | |
527 | || PACKET_remaining(pkt)) { | |
c48ffbcc | 528 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_SRTP_MKI_VALUE); |
25670f3e MC |
529 | return 0; |
530 | } | |
531 | ||
532 | return 1; | |
533 | } | |
534 | #endif | |
535 | ||
61138358 | 536 | int tls_parse_ctos_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 537 | size_t chainidx) |
25670f3e MC |
538 | { |
539 | if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC)) | |
28a31a0a | 540 | s->ext.use_etm = 1; |
25670f3e MC |
541 | |
542 | return 1; | |
543 | } | |
544 | ||
b2f7e8c0 MC |
545 | /* |
546 | * Process a psk_kex_modes extension received in the ClientHello. |pkt| contains | |
547 | * the raw PACKET data for the extension. Returns 1 on success or 0 on failure. | |
b2f7e8c0 | 548 | */ |
61138358 | 549 | int tls_parse_ctos_psk_kex_modes(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 550 | X509 *x, size_t chainidx) |
b2f7e8c0 MC |
551 | { |
552 | #ifndef OPENSSL_NO_TLS1_3 | |
553 | PACKET psk_kex_modes; | |
554 | unsigned int mode; | |
555 | ||
556 | if (!PACKET_as_length_prefixed_1(pkt, &psk_kex_modes) | |
557 | || PACKET_remaining(&psk_kex_modes) == 0) { | |
c48ffbcc | 558 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
b2f7e8c0 MC |
559 | return 0; |
560 | } | |
561 | ||
562 | while (PACKET_get_1(&psk_kex_modes, &mode)) { | |
563 | if (mode == TLSEXT_KEX_MODE_KE_DHE) | |
564 | s->ext.psk_kex_mode |= TLSEXT_KEX_MODE_FLAG_KE_DHE; | |
e3c0d76b MC |
565 | else if (mode == TLSEXT_KEX_MODE_KE |
566 | && (s->options & SSL_OP_ALLOW_NO_DHE_KEX) != 0) | |
b2f7e8c0 MC |
567 | s->ext.psk_kex_mode |= TLSEXT_KEX_MODE_FLAG_KE; |
568 | } | |
569 | #endif | |
570 | ||
571 | return 1; | |
572 | } | |
573 | ||
25670f3e MC |
574 | /* |
575 | * Process a key_share extension received in the ClientHello. |pkt| contains | |
576 | * the raw PACKET data for the extension. Returns 1 on success or 0 on failure. | |
25670f3e | 577 | */ |
61138358 | 578 | int tls_parse_ctos_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 579 | size_t chainidx) |
25670f3e | 580 | { |
3cf96e88 | 581 | #ifndef OPENSSL_NO_TLS1_3 |
25670f3e MC |
582 | unsigned int group_id; |
583 | PACKET key_share_list, encoded_pt; | |
f48d826e DSH |
584 | const uint16_t *clntgroups, *srvrgroups; |
585 | size_t clnt_num_groups, srvr_num_groups; | |
43b95d73 | 586 | int found = 0; |
25670f3e | 587 | |
f4bbb37c | 588 | if (s->hit && (s->ext.psk_kex_mode & TLSEXT_KEX_MODE_FLAG_KE_DHE) == 0) |
25670f3e MC |
589 | return 1; |
590 | ||
591 | /* Sanity check */ | |
555cbb32 | 592 | if (s->s3.peer_tmp != NULL) { |
c48ffbcc | 593 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
594 | return 0; |
595 | } | |
596 | ||
597 | if (!PACKET_as_length_prefixed_2(pkt, &key_share_list)) { | |
c48ffbcc | 598 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
25670f3e MC |
599 | return 0; |
600 | } | |
601 | ||
f48d826e DSH |
602 | /* Get our list of supported groups */ |
603 | tls1_get_supported_groups(s, &srvrgroups, &srvr_num_groups); | |
604 | /* Get the clients list of supported groups. */ | |
605 | tls1_get_peer_groups(s, &clntgroups, &clnt_num_groups); | |
606 | if (clnt_num_groups == 0) { | |
b6fdc12d MC |
607 | /* |
608 | * This can only happen if the supported_groups extension was not sent, | |
609 | * because we verify that the length is non-zero when we process that | |
610 | * extension. | |
611 | */ | |
c48ffbcc | 612 | SSLfatal(s, SSL_AD_MISSING_EXTENSION, |
f63a17d6 | 613 | SSL_R_MISSING_SUPPORTED_GROUPS_EXTENSION); |
b6fdc12d MC |
614 | return 0; |
615 | } | |
25670f3e | 616 | |
555cbb32 | 617 | if (s->s3.group_id != 0 && PACKET_remaining(&key_share_list) == 0) { |
43054d3d MC |
618 | /* |
619 | * If we set a group_id already, then we must have sent an HRR | |
620 | * requesting a new key_share. If we haven't got one then that is an | |
621 | * error | |
622 | */ | |
c48ffbcc | 623 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_KEY_SHARE); |
43054d3d MC |
624 | return 0; |
625 | } | |
626 | ||
25670f3e MC |
627 | while (PACKET_remaining(&key_share_list) > 0) { |
628 | if (!PACKET_get_net_2(&key_share_list, &group_id) | |
629 | || !PACKET_get_length_prefixed_2(&key_share_list, &encoded_pt) | |
630 | || PACKET_remaining(&encoded_pt) == 0) { | |
c48ffbcc | 631 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
25670f3e MC |
632 | return 0; |
633 | } | |
634 | ||
635 | /* | |
636 | * If we already found a suitable key_share we loop through the | |
637 | * rest to verify the structure, but don't process them. | |
638 | */ | |
639 | if (found) | |
640 | continue; | |
641 | ||
43054d3d MC |
642 | /* |
643 | * If we sent an HRR then the key_share sent back MUST be for the group | |
644 | * we requested, and must be the only key_share sent. | |
645 | */ | |
555cbb32 TS |
646 | if (s->s3.group_id != 0 |
647 | && (group_id != s->s3.group_id | |
43054d3d | 648 | || PACKET_remaining(&key_share_list) != 0)) { |
c48ffbcc | 649 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_KEY_SHARE); |
43054d3d MC |
650 | return 0; |
651 | } | |
652 | ||
25670f3e | 653 | /* Check if this share is in supported_groups sent from client */ |
f48d826e | 654 | if (!check_in_list(s, group_id, clntgroups, clnt_num_groups, 0)) { |
c48ffbcc | 655 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_KEY_SHARE); |
25670f3e MC |
656 | return 0; |
657 | } | |
658 | ||
659 | /* Check if this share is for a group we can use */ | |
f48d826e | 660 | if (!check_in_list(s, group_id, srvrgroups, srvr_num_groups, 1)) { |
25670f3e MC |
661 | /* Share not suitable */ |
662 | continue; | |
663 | } | |
664 | ||
ada66e78 | 665 | if ((s->s3.peer_tmp = ssl_generate_param_group(s, group_id)) == NULL) { |
c48ffbcc | 666 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
25670f3e MC |
667 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
668 | return 0; | |
669 | } | |
670 | ||
555cbb32 | 671 | s->s3.group_id = group_id; |
25670f3e | 672 | |
5ac8fb58 | 673 | if (EVP_PKEY_set1_encoded_public_key(s->s3.peer_tmp, |
25670f3e | 674 | PACKET_data(&encoded_pt), |
5ac8fb58 | 675 | PACKET_remaining(&encoded_pt)) <= 0) { |
c48ffbcc | 676 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_ECPOINT); |
25670f3e MC |
677 | return 0; |
678 | } | |
679 | ||
680 | found = 1; | |
681 | } | |
3cf96e88 | 682 | #endif |
25670f3e MC |
683 | |
684 | return 1; | |
685 | } | |
686 | ||
43054d3d MC |
687 | int tls_parse_ctos_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
688 | size_t chainidx) | |
689 | { | |
1aac20f5 | 690 | #ifndef OPENSSL_NO_TLS1_3 |
dd77962e | 691 | unsigned int format, version, key_share, group_id; |
43054d3d MC |
692 | EVP_MD_CTX *hctx; |
693 | EVP_PKEY *pkey; | |
694 | PACKET cookie, raw, chhash, appcookie; | |
695 | WPACKET hrrpkt; | |
696 | const unsigned char *data, *mdin, *ciphdata; | |
697 | unsigned char hmac[SHA256_DIGEST_LENGTH]; | |
698 | unsigned char hrr[MAX_HRR_SIZE]; | |
699 | size_t rawlen, hmaclen, hrrlen, ciphlen; | |
d0debc0a | 700 | unsigned long tm, now; |
43054d3d MC |
701 | |
702 | /* Ignore any cookie if we're not set up to verify it */ | |
3fa2812f | 703 | if (s->ctx->verify_stateless_cookie_cb == NULL |
555cbb32 | 704 | || (s->s3.flags & TLS1_FLAGS_STATELESS) == 0) |
43054d3d MC |
705 | return 1; |
706 | ||
707 | if (!PACKET_as_length_prefixed_2(pkt, &cookie)) { | |
c48ffbcc | 708 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
709 | return 0; |
710 | } | |
711 | ||
712 | raw = cookie; | |
713 | data = PACKET_data(&raw); | |
714 | rawlen = PACKET_remaining(&raw); | |
715 | if (rawlen < SHA256_DIGEST_LENGTH | |
716 | || !PACKET_forward(&raw, rawlen - SHA256_DIGEST_LENGTH)) { | |
c48ffbcc | 717 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
718 | return 0; |
719 | } | |
720 | mdin = PACKET_data(&raw); | |
721 | ||
722 | /* Verify the HMAC of the cookie */ | |
723 | hctx = EVP_MD_CTX_create(); | |
d8652be0 MC |
724 | pkey = EVP_PKEY_new_raw_private_key_ex(s->ctx->libctx, "HMAC", |
725 | s->ctx->propq, | |
726 | s->session_ctx->ext.cookie_hmac_key, | |
727 | sizeof(s->session_ctx->ext.cookie_hmac_key)); | |
43054d3d MC |
728 | if (hctx == NULL || pkey == NULL) { |
729 | EVP_MD_CTX_free(hctx); | |
730 | EVP_PKEY_free(pkey); | |
c48ffbcc | 731 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); |
43054d3d MC |
732 | return 0; |
733 | } | |
734 | ||
97ea1e7f | 735 | hmaclen = SHA256_DIGEST_LENGTH; |
d8652be0 MC |
736 | if (EVP_DigestSignInit_ex(hctx, NULL, "SHA2-256", s->ctx->libctx, |
737 | s->ctx->propq, pkey) <= 0 | |
97ea1e7f MC |
738 | || EVP_DigestSign(hctx, hmac, &hmaclen, data, |
739 | rawlen - SHA256_DIGEST_LENGTH) <= 0 | |
43054d3d MC |
740 | || hmaclen != SHA256_DIGEST_LENGTH) { |
741 | EVP_MD_CTX_free(hctx); | |
742 | EVP_PKEY_free(pkey); | |
c48ffbcc | 743 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
744 | return 0; |
745 | } | |
746 | ||
747 | EVP_MD_CTX_free(hctx); | |
748 | EVP_PKEY_free(pkey); | |
749 | ||
750 | if (CRYPTO_memcmp(hmac, mdin, SHA256_DIGEST_LENGTH) != 0) { | |
c48ffbcc | 751 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_COOKIE_MISMATCH); |
43054d3d MC |
752 | return 0; |
753 | } | |
754 | ||
755 | if (!PACKET_get_net_2(&cookie, &format)) { | |
c48ffbcc | 756 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
757 | return 0; |
758 | } | |
759 | /* Check the cookie format is something we recognise. Ignore it if not */ | |
760 | if (format != COOKIE_STATE_FORMAT_VERSION) | |
761 | return 1; | |
762 | ||
763 | /* | |
764 | * The rest of these checks really shouldn't fail since we have verified the | |
765 | * HMAC above. | |
766 | */ | |
767 | ||
768 | /* Check the version number is sane */ | |
769 | if (!PACKET_get_net_2(&cookie, &version)) { | |
c48ffbcc | 770 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
771 | return 0; |
772 | } | |
773 | if (version != TLS1_3_VERSION) { | |
c48ffbcc | 774 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
43054d3d MC |
775 | SSL_R_BAD_PROTOCOL_VERSION_NUMBER); |
776 | return 0; | |
777 | } | |
778 | ||
dd77962e | 779 | if (!PACKET_get_net_2(&cookie, &group_id)) { |
c48ffbcc | 780 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
781 | return 0; |
782 | } | |
dd77962e | 783 | |
43054d3d MC |
784 | ciphdata = PACKET_data(&cookie); |
785 | if (!PACKET_forward(&cookie, 2)) { | |
c48ffbcc | 786 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
787 | return 0; |
788 | } | |
555cbb32 TS |
789 | if (group_id != s->s3.group_id |
790 | || s->s3.tmp.new_cipher | |
dd77962e MC |
791 | != ssl_get_cipher_by_char(s, ciphdata, 0)) { |
792 | /* | |
793 | * We chose a different cipher or group id this time around to what is | |
794 | * in the cookie. Something must have changed. | |
795 | */ | |
c48ffbcc | 796 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_CIPHER); |
43054d3d MC |
797 | return 0; |
798 | } | |
799 | ||
800 | if (!PACKET_get_1(&cookie, &key_share) | |
d0debc0a | 801 | || !PACKET_get_net_4(&cookie, &tm) |
43054d3d MC |
802 | || !PACKET_get_length_prefixed_2(&cookie, &chhash) |
803 | || !PACKET_get_length_prefixed_1(&cookie, &appcookie) | |
804 | || PACKET_remaining(&cookie) != SHA256_DIGEST_LENGTH) { | |
c48ffbcc | 805 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
806 | return 0; |
807 | } | |
808 | ||
d0debc0a MC |
809 | /* We tolerate a cookie age of up to 10 minutes (= 60 * 10 seconds) */ |
810 | now = (unsigned long)time(NULL); | |
811 | if (tm > now || (now - tm) > 600) { | |
812 | /* Cookie is stale. Ignore it */ | |
813 | return 1; | |
814 | } | |
815 | ||
43054d3d | 816 | /* Verify the app cookie */ |
3fa2812f | 817 | if (s->ctx->verify_stateless_cookie_cb(s, PACKET_data(&appcookie), |
43054d3d | 818 | PACKET_remaining(&appcookie)) == 0) { |
c48ffbcc | 819 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_COOKIE_MISMATCH); |
43054d3d MC |
820 | return 0; |
821 | } | |
822 | ||
823 | /* | |
824 | * Reconstruct the HRR that we would have sent in response to the original | |
825 | * ClientHello so we can add it to the transcript hash. | |
826 | * Note: This won't work with custom HRR extensions | |
827 | */ | |
828 | if (!WPACKET_init_static_len(&hrrpkt, hrr, sizeof(hrr), 0)) { | |
c48ffbcc | 829 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
830 | return 0; |
831 | } | |
832 | if (!WPACKET_put_bytes_u8(&hrrpkt, SSL3_MT_SERVER_HELLO) | |
833 | || !WPACKET_start_sub_packet_u24(&hrrpkt) | |
834 | || !WPACKET_put_bytes_u16(&hrrpkt, TLS1_2_VERSION) | |
835 | || !WPACKET_memcpy(&hrrpkt, hrrrandom, SSL3_RANDOM_SIZE) | |
836 | || !WPACKET_sub_memcpy_u8(&hrrpkt, s->tmp_session_id, | |
837 | s->tmp_session_id_len) | |
555cbb32 | 838 | || !s->method->put_cipher_by_char(s->s3.tmp.new_cipher, &hrrpkt, |
43054d3d MC |
839 | &ciphlen) |
840 | || !WPACKET_put_bytes_u8(&hrrpkt, 0) | |
841 | || !WPACKET_start_sub_packet_u16(&hrrpkt)) { | |
842 | WPACKET_cleanup(&hrrpkt); | |
c48ffbcc | 843 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
844 | return 0; |
845 | } | |
846 | if (!WPACKET_put_bytes_u16(&hrrpkt, TLSEXT_TYPE_supported_versions) | |
847 | || !WPACKET_start_sub_packet_u16(&hrrpkt) | |
35e742ec | 848 | || !WPACKET_put_bytes_u16(&hrrpkt, s->version) |
43054d3d MC |
849 | || !WPACKET_close(&hrrpkt)) { |
850 | WPACKET_cleanup(&hrrpkt); | |
c48ffbcc | 851 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
852 | return 0; |
853 | } | |
854 | if (key_share) { | |
855 | if (!WPACKET_put_bytes_u16(&hrrpkt, TLSEXT_TYPE_key_share) | |
856 | || !WPACKET_start_sub_packet_u16(&hrrpkt) | |
555cbb32 | 857 | || !WPACKET_put_bytes_u16(&hrrpkt, s->s3.group_id) |
43054d3d MC |
858 | || !WPACKET_close(&hrrpkt)) { |
859 | WPACKET_cleanup(&hrrpkt); | |
c48ffbcc | 860 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
861 | return 0; |
862 | } | |
863 | } | |
864 | if (!WPACKET_put_bytes_u16(&hrrpkt, TLSEXT_TYPE_cookie) | |
865 | || !WPACKET_start_sub_packet_u16(&hrrpkt) | |
866 | || !WPACKET_sub_memcpy_u16(&hrrpkt, data, rawlen) | |
867 | || !WPACKET_close(&hrrpkt) /* cookie extension */ | |
868 | || !WPACKET_close(&hrrpkt) /* extension block */ | |
869 | || !WPACKET_close(&hrrpkt) /* message */ | |
870 | || !WPACKET_get_total_written(&hrrpkt, &hrrlen) | |
871 | || !WPACKET_finish(&hrrpkt)) { | |
872 | WPACKET_cleanup(&hrrpkt); | |
c48ffbcc | 873 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
874 | return 0; |
875 | } | |
876 | ||
877 | /* Reconstruct the transcript hash */ | |
878 | if (!create_synthetic_message_hash(s, PACKET_data(&chhash), | |
879 | PACKET_remaining(&chhash), hrr, | |
880 | hrrlen)) { | |
881 | /* SSLfatal() already called */ | |
882 | return 0; | |
883 | } | |
884 | ||
885 | /* Act as if this ClientHello came after a HelloRetryRequest */ | |
886 | s->hello_retry_request = 1; | |
887 | ||
c36001c3 | 888 | s->ext.cookieok = 1; |
1aac20f5 | 889 | #endif |
c36001c3 | 890 | |
43054d3d MC |
891 | return 1; |
892 | } | |
893 | ||
61138358 | 894 | int tls_parse_ctos_supported_groups(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 895 | X509 *x, size_t chainidx) |
25670f3e MC |
896 | { |
897 | PACKET supported_groups_list; | |
898 | ||
899 | /* Each group is 2 bytes and we must have at least 1. */ | |
900 | if (!PACKET_as_length_prefixed_2(pkt, &supported_groups_list) | |
901 | || PACKET_remaining(&supported_groups_list) == 0 | |
902 | || (PACKET_remaining(&supported_groups_list) % 2) != 0) { | |
c48ffbcc | 903 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
904 | return 0; |
905 | } | |
906 | ||
e3743355 | 907 | if (!s->hit || SSL_IS_TLS13(s)) { |
45436e61 MC |
908 | OPENSSL_free(s->ext.peer_supportedgroups); |
909 | s->ext.peer_supportedgroups = NULL; | |
910 | s->ext.peer_supportedgroups_len = 0; | |
9e84a42d | 911 | if (!tls1_save_u16(&supported_groups_list, |
45436e61 MC |
912 | &s->ext.peer_supportedgroups, |
913 | &s->ext.peer_supportedgroups_len)) { | |
c48ffbcc | 914 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
e3743355 BK |
915 | return 0; |
916 | } | |
25670f3e MC |
917 | } |
918 | ||
919 | return 1; | |
920 | } | |
25670f3e | 921 | |
61138358 | 922 | int tls_parse_ctos_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 923 | size_t chainidx) |
25670f3e MC |
924 | { |
925 | /* The extension must always be empty */ | |
926 | if (PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 927 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
928 | return 0; |
929 | } | |
930 | ||
088dfa13 TS |
931 | if (s->options & SSL_OP_NO_EXTENDED_MASTER_SECRET) |
932 | return 1; | |
933 | ||
555cbb32 | 934 | s->s3.flags |= TLS1_FLAGS_RECEIVED_EXTMS; |
25670f3e MC |
935 | |
936 | return 1; | |
937 | } | |
7da160b0 | 938 | |
38df5a45 MC |
939 | |
940 | int tls_parse_ctos_early_data(SSL *s, PACKET *pkt, unsigned int context, | |
f63a17d6 | 941 | X509 *x, size_t chainidx) |
38df5a45 MC |
942 | { |
943 | if (PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 944 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
38df5a45 MC |
945 | return 0; |
946 | } | |
947 | ||
fc7129dc | 948 | if (s->hello_retry_request != SSL_HRR_NONE) { |
c48ffbcc | 949 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_EXTENSION); |
d4504fe5 MC |
950 | return 0; |
951 | } | |
952 | ||
38df5a45 MC |
953 | return 1; |
954 | } | |
955 | ||
6cc0b3c2 MC |
956 | static SSL_TICKET_STATUS tls_get_stateful_ticket(SSL *s, PACKET *tick, |
957 | SSL_SESSION **sess) | |
958 | { | |
959 | SSL_SESSION *tmpsess = NULL; | |
960 | ||
5f26ddff MC |
961 | s->ext.ticket_expected = 1; |
962 | ||
6cc0b3c2 MC |
963 | switch (PACKET_remaining(tick)) { |
964 | case 0: | |
965 | return SSL_TICKET_EMPTY; | |
966 | ||
967 | case SSL_MAX_SSL_SESSION_ID_LENGTH: | |
968 | break; | |
969 | ||
970 | default: | |
971 | return SSL_TICKET_NO_DECRYPT; | |
972 | } | |
973 | ||
974 | tmpsess = lookup_sess_in_cache(s, PACKET_data(tick), | |
975 | SSL_MAX_SSL_SESSION_ID_LENGTH); | |
976 | ||
977 | if (tmpsess == NULL) | |
978 | return SSL_TICKET_NO_DECRYPT; | |
979 | ||
6cc0b3c2 MC |
980 | *sess = tmpsess; |
981 | return SSL_TICKET_SUCCESS; | |
982 | } | |
983 | ||
61138358 | 984 | int tls_parse_ctos_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 985 | size_t chainidx) |
1053a6e2 MC |
986 | { |
987 | PACKET identities, binders, binder; | |
988 | size_t binderoffset, hashsize; | |
989 | SSL_SESSION *sess = NULL; | |
3a7c56b2 | 990 | unsigned int id, i, ext = 0; |
1053a6e2 MC |
991 | const EVP_MD *md = NULL; |
992 | ||
1a9f457c MC |
993 | /* |
994 | * If we have no PSK kex mode that we recognise then we can't resume so | |
995 | * ignore this extension | |
996 | */ | |
997 | if ((s->ext.psk_kex_mode | |
998 | & (TLSEXT_KEX_MODE_FLAG_KE | TLSEXT_KEX_MODE_FLAG_KE_DHE)) == 0) | |
999 | return 1; | |
1000 | ||
1053a6e2 | 1001 | if (!PACKET_get_length_prefixed_2(pkt, &identities)) { |
c48ffbcc | 1002 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1053a6e2 MC |
1003 | return 0; |
1004 | } | |
1005 | ||
61fb5923 | 1006 | s->ext.ticket_expected = 0; |
1053a6e2 MC |
1007 | for (id = 0; PACKET_remaining(&identities) != 0; id++) { |
1008 | PACKET identity; | |
2c604cb9 | 1009 | unsigned long ticket_agel; |
f3d40db1 | 1010 | size_t idlen; |
1053a6e2 MC |
1011 | |
1012 | if (!PACKET_get_length_prefixed_2(&identities, &identity) | |
2c604cb9 | 1013 | || !PACKET_get_net_4(&identities, &ticket_agel)) { |
c48ffbcc | 1014 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1053a6e2 MC |
1015 | return 0; |
1016 | } | |
1017 | ||
f3d40db1 | 1018 | idlen = PACKET_remaining(&identity); |
3a7c56b2 | 1019 | if (s->psk_find_session_cb != NULL |
f3d40db1 | 1020 | && !s->psk_find_session_cb(s, PACKET_data(&identity), idlen, |
011d768a | 1021 | &sess)) { |
c48ffbcc | 1022 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_EXTENSION); |
011d768a MC |
1023 | return 0; |
1024 | } | |
1025 | ||
c2b290c3 | 1026 | #ifndef OPENSSL_NO_PSK |
f3d40db1 MC |
1027 | if(sess == NULL |
1028 | && s->psk_server_callback != NULL | |
1029 | && idlen <= PSK_MAX_IDENTITY_LEN) { | |
1030 | char *pskid = NULL; | |
1031 | unsigned char pskdata[PSK_MAX_PSK_LEN]; | |
1032 | unsigned int pskdatalen; | |
1033 | ||
1034 | if (!PACKET_strndup(&identity, &pskid)) { | |
c48ffbcc | 1035 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
1036 | return 0; |
1037 | } | |
1038 | pskdatalen = s->psk_server_callback(s, pskid, pskdata, | |
1039 | sizeof(pskdata)); | |
1040 | OPENSSL_free(pskid); | |
1041 | if (pskdatalen > PSK_MAX_PSK_LEN) { | |
c48ffbcc | 1042 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
1043 | return 0; |
1044 | } else if (pskdatalen > 0) { | |
1045 | const SSL_CIPHER *cipher; | |
1046 | const unsigned char tls13_aes128gcmsha256_id[] = { 0x13, 0x01 }; | |
1047 | ||
1048 | /* | |
1049 | * We found a PSK using an old style callback. We don't know | |
1050 | * the digest so we default to SHA256 as per the TLSv1.3 spec | |
1051 | */ | |
1052 | cipher = SSL_CIPHER_find(s, tls13_aes128gcmsha256_id); | |
1053 | if (cipher == NULL) { | |
1054 | OPENSSL_cleanse(pskdata, pskdatalen); | |
c48ffbcc | 1055 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
1056 | return 0; |
1057 | } | |
1058 | ||
1059 | sess = SSL_SESSION_new(); | |
1060 | if (sess == NULL | |
1061 | || !SSL_SESSION_set1_master_key(sess, pskdata, | |
1062 | pskdatalen) | |
1063 | || !SSL_SESSION_set_cipher(sess, cipher) | |
1064 | || !SSL_SESSION_set_protocol_version(sess, | |
1065 | TLS1_3_VERSION)) { | |
1066 | OPENSSL_cleanse(pskdata, pskdatalen); | |
c48ffbcc | 1067 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
1068 | goto err; |
1069 | } | |
1070 | OPENSSL_cleanse(pskdata, pskdatalen); | |
1071 | } | |
1072 | } | |
c2b290c3 | 1073 | #endif /* OPENSSL_NO_PSK */ |
f3d40db1 | 1074 | |
011d768a MC |
1075 | if (sess != NULL) { |
1076 | /* We found a PSK */ | |
3a7c56b2 | 1077 | SSL_SESSION *sesstmp = ssl_session_dup(sess, 0); |
1b8bacff | 1078 | |
3a7c56b2 | 1079 | if (sesstmp == NULL) { |
c48ffbcc | 1080 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
3a7c56b2 MC |
1081 | return 0; |
1082 | } | |
1083 | SSL_SESSION_free(sess); | |
1084 | sess = sesstmp; | |
1085 | ||
1086 | /* | |
1087 | * We've just been told to use this session for this context so | |
1088 | * make sure the sid_ctx matches up. | |
1089 | */ | |
1090 | memcpy(sess->sid_ctx, s->sid_ctx, s->sid_ctx_length); | |
1091 | sess->sid_ctx_length = s->sid_ctx_length; | |
1092 | ext = 1; | |
630369d9 MC |
1093 | if (id == 0) |
1094 | s->ext.early_data_ok = 1; | |
51256b34 | 1095 | s->ext.ticket_expected = 1; |
3a7c56b2 MC |
1096 | } else { |
1097 | uint32_t ticket_age = 0, now, agesec, agems; | |
61fb5923 MC |
1098 | int ret; |
1099 | ||
e880d4e5 MC |
1100 | /* |
1101 | * If we are using anti-replay protection then we behave as if | |
1102 | * SSL_OP_NO_TICKET is set - we are caching tickets anyway so there | |
1103 | * is no point in using full stateless tickets. | |
1104 | */ | |
1105 | if ((s->options & SSL_OP_NO_TICKET) != 0 | |
5d263fb7 MC |
1106 | || (s->max_early_data > 0 |
1107 | && (s->options & SSL_OP_NO_ANTI_REPLAY) == 0)) | |
6cc0b3c2 MC |
1108 | ret = tls_get_stateful_ticket(s, &identity, &sess); |
1109 | else | |
1110 | ret = tls_decrypt_ticket(s, PACKET_data(&identity), | |
1111 | PACKET_remaining(&identity), NULL, 0, | |
1112 | &sess); | |
61fb5923 MC |
1113 | |
1114 | if (ret == SSL_TICKET_EMPTY) { | |
c48ffbcc | 1115 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
61fb5923 MC |
1116 | return 0; |
1117 | } | |
3a7c56b2 | 1118 | |
df0fed9a TS |
1119 | if (ret == SSL_TICKET_FATAL_ERR_MALLOC |
1120 | || ret == SSL_TICKET_FATAL_ERR_OTHER) { | |
c48ffbcc | 1121 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
3a7c56b2 MC |
1122 | return 0; |
1123 | } | |
61fb5923 | 1124 | if (ret == SSL_TICKET_NONE || ret == SSL_TICKET_NO_DECRYPT) |
3a7c56b2 MC |
1125 | continue; |
1126 | ||
66d7de16 MC |
1127 | /* Check for replay */ |
1128 | if (s->max_early_data > 0 | |
5d263fb7 | 1129 | && (s->options & SSL_OP_NO_ANTI_REPLAY) == 0 |
66d7de16 MC |
1130 | && !SSL_CTX_remove_session(s->session_ctx, sess)) { |
1131 | SSL_SESSION_free(sess); | |
1132 | sess = NULL; | |
1133 | continue; | |
1134 | } | |
1135 | ||
3a7c56b2 MC |
1136 | ticket_age = (uint32_t)ticket_agel; |
1137 | now = (uint32_t)time(NULL); | |
1138 | agesec = now - (uint32_t)sess->time; | |
1139 | agems = agesec * (uint32_t)1000; | |
1140 | ticket_age -= sess->ext.tick_age_add; | |
1141 | ||
1142 | /* | |
1143 | * For simplicity we do our age calculations in seconds. If the | |
1144 | * client does it in ms then it could appear that their ticket age | |
1145 | * is longer than ours (our ticket age calculation should always be | |
1146 | * slightly longer than the client's due to the network latency). | |
1147 | * Therefore we add 1000ms to our age calculation to adjust for | |
1148 | * rounding errors. | |
1149 | */ | |
630369d9 MC |
1150 | if (id == 0 |
1151 | && sess->timeout >= (long)agesec | |
3a7c56b2 MC |
1152 | && agems / (uint32_t)1000 == agesec |
1153 | && ticket_age <= agems + 1000 | |
1154 | && ticket_age + TICKET_AGE_ALLOWANCE >= agems + 1000) { | |
1155 | /* | |
1156 | * Ticket age is within tolerance and not expired. We allow it | |
1157 | * for early data | |
1158 | */ | |
1159 | s->ext.early_data_ok = 1; | |
1160 | } | |
1053a6e2 | 1161 | } |
1053a6e2 | 1162 | |
c8f6c28a MC |
1163 | md = ssl_md(s->ctx, sess->cipher->algorithm2); |
1164 | if (!EVP_MD_is_a(md, | |
1165 | EVP_MD_name(ssl_md(s->ctx, s->s3.tmp.new_cipher->algorithm2)))) { | |
0de6d66d | 1166 | /* The ciphersuite is not compatible with this session. */ |
1053a6e2 MC |
1167 | SSL_SESSION_free(sess); |
1168 | sess = NULL; | |
630369d9 | 1169 | s->ext.early_data_ok = 0; |
51256b34 | 1170 | s->ext.ticket_expected = 0; |
1053a6e2 MC |
1171 | continue; |
1172 | } | |
1053a6e2 MC |
1173 | break; |
1174 | } | |
1175 | ||
1176 | if (sess == NULL) | |
1177 | return 1; | |
1178 | ||
1179 | binderoffset = PACKET_data(pkt) - (const unsigned char *)s->init_buf->data; | |
1053a6e2 MC |
1180 | hashsize = EVP_MD_size(md); |
1181 | ||
1182 | if (!PACKET_get_length_prefixed_2(pkt, &binders)) { | |
c48ffbcc | 1183 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1053a6e2 MC |
1184 | goto err; |
1185 | } | |
1186 | ||
1187 | for (i = 0; i <= id; i++) { | |
1188 | if (!PACKET_get_length_prefixed_1(&binders, &binder)) { | |
c48ffbcc | 1189 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1053a6e2 MC |
1190 | goto err; |
1191 | } | |
1192 | } | |
1193 | ||
2894e9cb | 1194 | if (PACKET_remaining(&binder) != hashsize) { |
c48ffbcc | 1195 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
2894e9cb MC |
1196 | goto err; |
1197 | } | |
1198 | if (tls_psk_do_binder(s, md, (const unsigned char *)s->init_buf->data, | |
1199 | binderoffset, PACKET_data(&binder), NULL, sess, 0, | |
1200 | ext) != 1) { | |
635c8f77 | 1201 | /* SSLfatal() already called */ |
1053a6e2 MC |
1202 | goto err; |
1203 | } | |
1204 | ||
c96ce52c | 1205 | s->ext.tick_identity = id; |
2c604cb9 | 1206 | |
1053a6e2 MC |
1207 | SSL_SESSION_free(s->session); |
1208 | s->session = sess; | |
1053a6e2 MC |
1209 | return 1; |
1210 | err: | |
312e9387 | 1211 | SSL_SESSION_free(sess); |
1053a6e2 MC |
1212 | return 0; |
1213 | } | |
1214 | ||
a7e6a3d8 P |
1215 | int tls_parse_ctos_post_handshake_auth(SSL *s, PACKET *pkt, |
1216 | ossl_unused unsigned int context, | |
1217 | ossl_unused X509 *x, | |
1218 | ossl_unused size_t chainidx) | |
9d75dce3 TS |
1219 | { |
1220 | if (PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 1221 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
9d75dce3 TS |
1222 | SSL_R_POST_HANDSHAKE_AUTH_ENCODING_ERR); |
1223 | return 0; | |
1224 | } | |
1225 | ||
1226 | s->post_handshake_auth = SSL_PHA_EXT_RECEIVED; | |
1227 | ||
1228 | return 1; | |
1229 | } | |
1230 | ||
1266eefd MC |
1231 | /* |
1232 | * Add the server's renegotiation binding | |
1233 | */ | |
b186a592 MC |
1234 | EXT_RETURN tls_construct_stoc_renegotiate(SSL *s, WPACKET *pkt, |
1235 | unsigned int context, X509 *x, | |
f63a17d6 | 1236 | size_t chainidx) |
7da160b0 | 1237 | { |
555cbb32 | 1238 | if (!s->s3.send_connection_binding) |
b186a592 | 1239 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 1240 | |
db0f35dd | 1241 | /* Still add this even if SSL_OP_NO_RENEGOTIATION is set */ |
7da160b0 MC |
1242 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_renegotiate) |
1243 | || !WPACKET_start_sub_packet_u16(pkt) | |
1244 | || !WPACKET_start_sub_packet_u8(pkt) | |
555cbb32 TS |
1245 | || !WPACKET_memcpy(pkt, s->s3.previous_client_finished, |
1246 | s->s3.previous_client_finished_len) | |
1247 | || !WPACKET_memcpy(pkt, s->s3.previous_server_finished, | |
1248 | s->s3.previous_server_finished_len) | |
7da160b0 MC |
1249 | || !WPACKET_close(pkt) |
1250 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1251 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1252 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1253 | } |
1254 | ||
b186a592 | 1255 | return EXT_RETURN_SENT; |
7da160b0 MC |
1256 | } |
1257 | ||
b186a592 MC |
1258 | EXT_RETURN tls_construct_stoc_server_name(SSL *s, WPACKET *pkt, |
1259 | unsigned int context, X509 *x, | |
f63a17d6 | 1260 | size_t chainidx) |
7da160b0 | 1261 | { |
7955c1f1 MC |
1262 | if (s->servername_done != 1) |
1263 | return EXT_RETURN_NOT_SENT; | |
1264 | ||
1265 | /* | |
1266 | * Prior to TLSv1.3 we ignore any SNI in the current handshake if resuming. | |
1267 | * We just use the servername from the initial handshake. | |
1268 | */ | |
1269 | if (s->hit && !SSL_IS_TLS13(s)) | |
b186a592 | 1270 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1271 | |
1272 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_server_name) | |
1273 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
c48ffbcc | 1274 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1275 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1276 | } |
1277 | ||
b186a592 | 1278 | return EXT_RETURN_SENT; |
7da160b0 MC |
1279 | } |
1280 | ||
cf72c757 F |
1281 | /* Add/include the server's max fragment len extension into ServerHello */ |
1282 | EXT_RETURN tls_construct_stoc_maxfragmentlen(SSL *s, WPACKET *pkt, | |
1283 | unsigned int context, X509 *x, | |
f63a17d6 | 1284 | size_t chainidx) |
cf72c757 F |
1285 | { |
1286 | if (!USE_MAX_FRAGMENT_LENGTH_EXT(s->session)) | |
1287 | return EXT_RETURN_NOT_SENT; | |
1288 | ||
1289 | /*- | |
1290 | * 4 bytes for this extension type and extension length | |
1291 | * 1 byte for the Max Fragment Length code value. | |
1292 | */ | |
1293 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_max_fragment_length) | |
1294 | || !WPACKET_start_sub_packet_u16(pkt) | |
1295 | || !WPACKET_put_bytes_u8(pkt, s->session->ext.max_fragment_len_mode) | |
1296 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1297 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
cf72c757 F |
1298 | return EXT_RETURN_FAIL; |
1299 | } | |
1300 | ||
1301 | return EXT_RETURN_SENT; | |
1302 | } | |
1303 | ||
b186a592 MC |
1304 | EXT_RETURN tls_construct_stoc_ec_pt_formats(SSL *s, WPACKET *pkt, |
1305 | unsigned int context, X509 *x, | |
f63a17d6 | 1306 | size_t chainidx) |
7da160b0 | 1307 | { |
555cbb32 TS |
1308 | unsigned long alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
1309 | unsigned long alg_a = s->s3.tmp.new_cipher->algorithm_auth; | |
89247375 | 1310 | int using_ecc = ((alg_k & SSL_kECDHE) || (alg_a & SSL_aECDSA)) |
cd0fb43c | 1311 | && (s->ext.peer_ecpointformats != NULL); |
7da160b0 MC |
1312 | const unsigned char *plist; |
1313 | size_t plistlen; | |
1314 | ||
1315 | if (!using_ecc) | |
b186a592 | 1316 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1317 | |
1318 | tls1_get_formatlist(s, &plist, &plistlen); | |
7da160b0 MC |
1319 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_ec_point_formats) |
1320 | || !WPACKET_start_sub_packet_u16(pkt) | |
1321 | || !WPACKET_sub_memcpy_u8(pkt, plist, plistlen) | |
1322 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1323 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1324 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1325 | } |
1326 | ||
b186a592 | 1327 | return EXT_RETURN_SENT; |
7da160b0 | 1328 | } |
7da160b0 | 1329 | |
b186a592 MC |
1330 | EXT_RETURN tls_construct_stoc_supported_groups(SSL *s, WPACKET *pkt, |
1331 | unsigned int context, X509 *x, | |
f63a17d6 | 1332 | size_t chainidx) |
6af87546 | 1333 | { |
9e84a42d | 1334 | const uint16_t *groups; |
6af87546 | 1335 | size_t numgroups, i, first = 1; |
9d2d857f | 1336 | int version; |
6af87546 | 1337 | |
555cbb32 TS |
1338 | /* s->s3.group_id is non zero if we accepted a key_share */ |
1339 | if (s->s3.group_id == 0) | |
b186a592 | 1340 | return EXT_RETURN_NOT_SENT; |
6af87546 MC |
1341 | |
1342 | /* Get our list of supported groups */ | |
ff6d20a6 | 1343 | tls1_get_supported_groups(s, &groups, &numgroups); |
34e5292c | 1344 | if (numgroups == 0) { |
c48ffbcc | 1345 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1346 | return EXT_RETURN_FAIL; |
6af87546 MC |
1347 | } |
1348 | ||
1349 | /* Copy group ID if supported */ | |
9d2d857f | 1350 | version = SSL_version(s); |
9e84a42d DSH |
1351 | for (i = 0; i < numgroups; i++) { |
1352 | uint16_t group = groups[i]; | |
1353 | ||
8b1db5d3 | 1354 | if (tls_valid_group(s, group, version, version, 0, NULL) |
dbc6268f | 1355 | && tls_group_allowed(s, group, SSL_SECOP_CURVE_SUPPORTED)) { |
6af87546 MC |
1356 | if (first) { |
1357 | /* | |
1358 | * Check if the client is already using our preferred group. If | |
1359 | * so we don't need to add this extension | |
1360 | */ | |
555cbb32 | 1361 | if (s->s3.group_id == group) |
b186a592 | 1362 | return EXT_RETURN_NOT_SENT; |
6af87546 MC |
1363 | |
1364 | /* Add extension header */ | |
1365 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_groups) | |
1366 | /* Sub-packet for supported_groups extension */ | |
1367 | || !WPACKET_start_sub_packet_u16(pkt) | |
1368 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
c48ffbcc | 1369 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1370 | return EXT_RETURN_FAIL; |
6af87546 MC |
1371 | } |
1372 | ||
1373 | first = 0; | |
1374 | } | |
9e84a42d | 1375 | if (!WPACKET_put_bytes_u16(pkt, group)) { |
c48ffbcc | 1376 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1377 | return EXT_RETURN_FAIL; |
6af87546 MC |
1378 | } |
1379 | } | |
1380 | } | |
1381 | ||
1382 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
c48ffbcc | 1383 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1384 | return EXT_RETURN_FAIL; |
6af87546 MC |
1385 | } |
1386 | ||
b186a592 | 1387 | return EXT_RETURN_SENT; |
6af87546 MC |
1388 | } |
1389 | ||
b186a592 MC |
1390 | EXT_RETURN tls_construct_stoc_session_ticket(SSL *s, WPACKET *pkt, |
1391 | unsigned int context, X509 *x, | |
f63a17d6 | 1392 | size_t chainidx) |
7da160b0 | 1393 | { |
aff8c126 RS |
1394 | if (!s->ext.ticket_expected || !tls_use_ticket(s)) { |
1395 | s->ext.ticket_expected = 0; | |
b186a592 | 1396 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1397 | } |
1398 | ||
1399 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket) | |
1400 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
c48ffbcc | 1401 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1402 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1403 | } |
1404 | ||
b186a592 | 1405 | return EXT_RETURN_SENT; |
7da160b0 MC |
1406 | } |
1407 | ||
ab83e314 | 1408 | #ifndef OPENSSL_NO_OCSP |
b186a592 MC |
1409 | EXT_RETURN tls_construct_stoc_status_request(SSL *s, WPACKET *pkt, |
1410 | unsigned int context, X509 *x, | |
f63a17d6 | 1411 | size_t chainidx) |
7da160b0 | 1412 | { |
debb64a0 MC |
1413 | /* We don't currently support this extension inside a CertificateRequest */ |
1414 | if (context == SSL_EXT_TLS1_3_CERTIFICATE_REQUEST) | |
1415 | return EXT_RETURN_NOT_SENT; | |
1416 | ||
aff8c126 | 1417 | if (!s->ext.status_expected) |
b186a592 | 1418 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 1419 | |
8521ced6 | 1420 | if (SSL_IS_TLS13(s) && chainidx != 0) |
b186a592 | 1421 | return EXT_RETURN_NOT_SENT; |
e96e0f8e | 1422 | |
7da160b0 | 1423 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request) |
f63e4288 | 1424 | || !WPACKET_start_sub_packet_u16(pkt)) { |
c48ffbcc | 1425 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1426 | return EXT_RETURN_FAIL; |
f63e4288 MC |
1427 | } |
1428 | ||
1429 | /* | |
1430 | * In TLSv1.3 we include the certificate status itself. In <= TLSv1.2 we | |
1431 | * send back an empty extension, with the certificate status appearing as a | |
1432 | * separate message | |
1433 | */ | |
3ec8d113 MC |
1434 | if (SSL_IS_TLS13(s) && !tls_construct_cert_status_body(s, pkt)) { |
1435 | /* SSLfatal() already called */ | |
56d36288 | 1436 | return EXT_RETURN_FAIL; |
3ec8d113 MC |
1437 | } |
1438 | if (!WPACKET_close(pkt)) { | |
c48ffbcc | 1439 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1440 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1441 | } |
1442 | ||
b186a592 | 1443 | return EXT_RETURN_SENT; |
7da160b0 | 1444 | } |
ab83e314 | 1445 | #endif |
7da160b0 | 1446 | |
7da160b0 | 1447 | #ifndef OPENSSL_NO_NEXTPROTONEG |
b186a592 MC |
1448 | EXT_RETURN tls_construct_stoc_next_proto_neg(SSL *s, WPACKET *pkt, |
1449 | unsigned int context, X509 *x, | |
f63a17d6 | 1450 | size_t chainidx) |
7da160b0 MC |
1451 | { |
1452 | const unsigned char *npa; | |
1453 | unsigned int npalen; | |
1454 | int ret; | |
555cbb32 | 1455 | int npn_seen = s->s3.npn_seen; |
7da160b0 | 1456 | |
555cbb32 | 1457 | s->s3.npn_seen = 0; |
aff8c126 | 1458 | if (!npn_seen || s->ctx->ext.npn_advertised_cb == NULL) |
b186a592 | 1459 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 1460 | |
aff8c126 RS |
1461 | ret = s->ctx->ext.npn_advertised_cb(s, &npa, &npalen, |
1462 | s->ctx->ext.npn_advertised_cb_arg); | |
7da160b0 MC |
1463 | if (ret == SSL_TLSEXT_ERR_OK) { |
1464 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_next_proto_neg) | |
1465 | || !WPACKET_sub_memcpy_u16(pkt, npa, npalen)) { | |
c48ffbcc | 1466 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1467 | return EXT_RETURN_FAIL; |
7da160b0 | 1468 | } |
555cbb32 | 1469 | s->s3.npn_seen = 1; |
7da160b0 MC |
1470 | } |
1471 | ||
b186a592 | 1472 | return EXT_RETURN_SENT; |
7da160b0 MC |
1473 | } |
1474 | #endif | |
1475 | ||
b186a592 | 1476 | EXT_RETURN tls_construct_stoc_alpn(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 1477 | X509 *x, size_t chainidx) |
7da160b0 | 1478 | { |
555cbb32 | 1479 | if (s->s3.alpn_selected == NULL) |
b186a592 | 1480 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1481 | |
1482 | if (!WPACKET_put_bytes_u16(pkt, | |
1483 | TLSEXT_TYPE_application_layer_protocol_negotiation) | |
1484 | || !WPACKET_start_sub_packet_u16(pkt) | |
1485 | || !WPACKET_start_sub_packet_u16(pkt) | |
555cbb32 TS |
1486 | || !WPACKET_sub_memcpy_u8(pkt, s->s3.alpn_selected, |
1487 | s->s3.alpn_selected_len) | |
7da160b0 MC |
1488 | || !WPACKET_close(pkt) |
1489 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1490 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1491 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1492 | } |
1493 | ||
b186a592 | 1494 | return EXT_RETURN_SENT; |
7da160b0 MC |
1495 | } |
1496 | ||
1497 | #ifndef OPENSSL_NO_SRTP | |
b186a592 MC |
1498 | EXT_RETURN tls_construct_stoc_use_srtp(SSL *s, WPACKET *pkt, |
1499 | unsigned int context, X509 *x, | |
f63a17d6 | 1500 | size_t chainidx) |
7da160b0 MC |
1501 | { |
1502 | if (s->srtp_profile == NULL) | |
b186a592 | 1503 | return EXT_RETURN_NOT_SENT; |
a1448c26 | 1504 | |
7da160b0 MC |
1505 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp) |
1506 | || !WPACKET_start_sub_packet_u16(pkt) | |
1507 | || !WPACKET_put_bytes_u16(pkt, 2) | |
1508 | || !WPACKET_put_bytes_u16(pkt, s->srtp_profile->id) | |
1509 | || !WPACKET_put_bytes_u8(pkt, 0) | |
1510 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1511 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1512 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1513 | } |
1514 | ||
b186a592 | 1515 | return EXT_RETURN_SENT; |
7da160b0 MC |
1516 | } |
1517 | #endif | |
1518 | ||
b186a592 | 1519 | EXT_RETURN tls_construct_stoc_etm(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 1520 | X509 *x, size_t chainidx) |
7da160b0 | 1521 | { |
28a31a0a | 1522 | if (!s->ext.use_etm) |
b186a592 | 1523 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1524 | |
1525 | /* | |
1526 | * Don't use encrypt_then_mac if AEAD or RC4 might want to disable | |
1527 | * for other cases too. | |
1528 | */ | |
555cbb32 TS |
1529 | if (s->s3.tmp.new_cipher->algorithm_mac == SSL_AEAD |
1530 | || s->s3.tmp.new_cipher->algorithm_enc == SSL_RC4 | |
1531 | || s->s3.tmp.new_cipher->algorithm_enc == SSL_eGOST2814789CNT | |
5a5530a2 DB |
1532 | || s->s3.tmp.new_cipher->algorithm_enc == SSL_eGOST2814789CNT12 |
1533 | || s->s3.tmp.new_cipher->algorithm_enc == SSL_MAGMA | |
1534 | || s->s3.tmp.new_cipher->algorithm_enc == SSL_KUZNYECHIK) { | |
28a31a0a | 1535 | s->ext.use_etm = 0; |
b186a592 | 1536 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1537 | } |
1538 | ||
1539 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac) | |
1540 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
c48ffbcc | 1541 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1542 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1543 | } |
1544 | ||
b186a592 | 1545 | return EXT_RETURN_SENT; |
7da160b0 MC |
1546 | } |
1547 | ||
b186a592 | 1548 | EXT_RETURN tls_construct_stoc_ems(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 1549 | X509 *x, size_t chainidx) |
7da160b0 | 1550 | { |
555cbb32 | 1551 | if ((s->s3.flags & TLS1_FLAGS_RECEIVED_EXTMS) == 0) |
b186a592 | 1552 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1553 | |
1554 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret) | |
1555 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
c48ffbcc | 1556 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1557 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1558 | } |
1559 | ||
b186a592 | 1560 | return EXT_RETURN_SENT; |
7da160b0 MC |
1561 | } |
1562 | ||
88050dd1 MC |
1563 | EXT_RETURN tls_construct_stoc_supported_versions(SSL *s, WPACKET *pkt, |
1564 | unsigned int context, X509 *x, | |
1565 | size_t chainidx) | |
1566 | { | |
27e462f1 | 1567 | if (!ossl_assert(SSL_IS_TLS13(s))) { |
c48ffbcc | 1568 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
27e462f1 MC |
1569 | return EXT_RETURN_FAIL; |
1570 | } | |
88050dd1 MC |
1571 | |
1572 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_versions) | |
1573 | || !WPACKET_start_sub_packet_u16(pkt) | |
35e742ec | 1574 | || !WPACKET_put_bytes_u16(pkt, s->version) |
88050dd1 | 1575 | || !WPACKET_close(pkt)) { |
c48ffbcc | 1576 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
88050dd1 MC |
1577 | return EXT_RETURN_FAIL; |
1578 | } | |
1579 | ||
1580 | return EXT_RETURN_SENT; | |
1581 | } | |
1582 | ||
b186a592 MC |
1583 | EXT_RETURN tls_construct_stoc_key_share(SSL *s, WPACKET *pkt, |
1584 | unsigned int context, X509 *x, | |
f63a17d6 | 1585 | size_t chainidx) |
7da160b0 | 1586 | { |
3cf96e88 | 1587 | #ifndef OPENSSL_NO_TLS1_3 |
7da160b0 MC |
1588 | unsigned char *encodedPoint; |
1589 | size_t encoded_pt_len = 0; | |
555cbb32 | 1590 | EVP_PKEY *ckey = s->s3.peer_tmp, *skey = NULL; |
8b17fbaf | 1591 | const TLS_GROUP_INFO *ginf = NULL; |
7da160b0 | 1592 | |
dd77962e MC |
1593 | if (s->hello_retry_request == SSL_HRR_PENDING) { |
1594 | if (ckey != NULL) { | |
1595 | /* Original key_share was acceptable so don't ask for another one */ | |
1596 | return EXT_RETURN_NOT_SENT; | |
1597 | } | |
1598 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
1599 | || !WPACKET_start_sub_packet_u16(pkt) | |
555cbb32 | 1600 | || !WPACKET_put_bytes_u16(pkt, s->s3.group_id) |
dd77962e | 1601 | || !WPACKET_close(pkt)) { |
c48ffbcc | 1602 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
dd77962e | 1603 | return EXT_RETURN_FAIL; |
7d061fce MC |
1604 | } |
1605 | ||
dd77962e MC |
1606 | return EXT_RETURN_SENT; |
1607 | } | |
1608 | ||
1609 | if (ckey == NULL) { | |
1610 | /* No key_share received from client - must be resuming */ | |
0247086d | 1611 | if (!s->hit || !tls13_generate_handshake_secret(s, NULL, 0)) { |
c48ffbcc | 1612 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1613 | return EXT_RETURN_FAIL; |
0247086d | 1614 | } |
b186a592 | 1615 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1616 | } |
1617 | ||
1618 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
1619 | || !WPACKET_start_sub_packet_u16(pkt) | |
555cbb32 | 1620 | || !WPACKET_put_bytes_u16(pkt, s->s3.group_id)) { |
c48ffbcc | 1621 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1622 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1623 | } |
1624 | ||
8b17fbaf | 1625 | if ((ginf = tls1_group_id_lookup(s->ctx, s->s3.group_id)) == NULL) { |
c48ffbcc | 1626 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1627 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1628 | } |
1629 | ||
8b17fbaf NT |
1630 | if (!ginf->is_kem) { |
1631 | /* Regular KEX */ | |
1632 | skey = ssl_generate_pkey(s, ckey); | |
1633 | if (skey == NULL) { | |
c48ffbcc | 1634 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); |
8b17fbaf NT |
1635 | return EXT_RETURN_FAIL; |
1636 | } | |
7da160b0 | 1637 | |
8b17fbaf | 1638 | /* Generate encoding of server key */ |
5ac8fb58 | 1639 | encoded_pt_len = EVP_PKEY_get1_encoded_public_key(skey, &encodedPoint); |
8b17fbaf | 1640 | if (encoded_pt_len == 0) { |
c48ffbcc | 1641 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EC_LIB); |
8b17fbaf NT |
1642 | EVP_PKEY_free(skey); |
1643 | return EXT_RETURN_FAIL; | |
1644 | } | |
1645 | ||
1646 | if (!WPACKET_sub_memcpy_u16(pkt, encodedPoint, encoded_pt_len) | |
1647 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1648 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
8b17fbaf NT |
1649 | EVP_PKEY_free(skey); |
1650 | OPENSSL_free(encodedPoint); | |
1651 | return EXT_RETURN_FAIL; | |
1652 | } | |
7da160b0 | 1653 | OPENSSL_free(encodedPoint); |
7da160b0 | 1654 | |
8b17fbaf NT |
1655 | /* |
1656 | * This causes the crypto state to be updated based on the derived keys | |
1657 | */ | |
1658 | s->s3.tmp.pkey = skey; | |
1659 | if (ssl_derive(s, skey, ckey, 1) == 0) { | |
1660 | /* SSLfatal() already called */ | |
1661 | return EXT_RETURN_FAIL; | |
1662 | } | |
1663 | } else { | |
1664 | /* KEM mode */ | |
1665 | unsigned char *ct = NULL; | |
1666 | size_t ctlen = 0; | |
1667 | ||
1668 | /* | |
1669 | * This does not update the crypto state. | |
1670 | * | |
1671 | * The generated pms is stored in `s->s3.tmp.pms` to be later used via | |
1672 | * ssl_gensecret(). | |
1673 | */ | |
1674 | if (ssl_encapsulate(s, ckey, &ct, &ctlen, 0) == 0) { | |
1675 | /* SSLfatal() already called */ | |
1676 | return EXT_RETURN_FAIL; | |
1677 | } | |
1678 | ||
1679 | if (ctlen == 0) { | |
c48ffbcc | 1680 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
8b17fbaf NT |
1681 | OPENSSL_free(ct); |
1682 | return EXT_RETURN_FAIL; | |
1683 | } | |
1684 | ||
1685 | if (!WPACKET_sub_memcpy_u16(pkt, ct, ctlen) | |
1686 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1687 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
8b17fbaf NT |
1688 | OPENSSL_free(ct); |
1689 | return EXT_RETURN_FAIL; | |
1690 | } | |
1691 | OPENSSL_free(ct); | |
1692 | ||
1693 | /* | |
1694 | * This causes the crypto state to be updated based on the generated pms | |
1695 | */ | |
1696 | if (ssl_gensecret(s, s->s3.tmp.pms, s->s3.tmp.pmslen) == 0) { | |
1697 | /* SSLfatal() already called */ | |
1698 | return EXT_RETURN_FAIL; | |
1699 | } | |
7da160b0 | 1700 | } |
b186a592 | 1701 | return EXT_RETURN_SENT; |
1aac20f5 MC |
1702 | #else |
1703 | return EXT_RETURN_FAIL; | |
1704 | #endif | |
7da160b0 MC |
1705 | } |
1706 | ||
43054d3d MC |
1707 | EXT_RETURN tls_construct_stoc_cookie(SSL *s, WPACKET *pkt, unsigned int context, |
1708 | X509 *x, size_t chainidx) | |
1709 | { | |
1aac20f5 | 1710 | #ifndef OPENSSL_NO_TLS1_3 |
43054d3d MC |
1711 | unsigned char *hashval1, *hashval2, *appcookie1, *appcookie2, *cookie; |
1712 | unsigned char *hmac, *hmac2; | |
3fa2812f | 1713 | size_t startlen, ciphlen, totcookielen, hashlen, hmaclen, appcookielen; |
43054d3d MC |
1714 | EVP_MD_CTX *hctx; |
1715 | EVP_PKEY *pkey; | |
1716 | int ret = EXT_RETURN_FAIL; | |
1717 | ||
555cbb32 | 1718 | if ((s->s3.flags & TLS1_FLAGS_STATELESS) == 0) |
43054d3d MC |
1719 | return EXT_RETURN_NOT_SENT; |
1720 | ||
3fa2812f | 1721 | if (s->ctx->gen_stateless_cookie_cb == NULL) { |
c48ffbcc | 1722 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_NO_COOKIE_CALLBACK_SET); |
e440f513 MC |
1723 | return EXT_RETURN_FAIL; |
1724 | } | |
1725 | ||
43054d3d MC |
1726 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_cookie) |
1727 | || !WPACKET_start_sub_packet_u16(pkt) | |
1728 | || !WPACKET_start_sub_packet_u16(pkt) | |
1729 | || !WPACKET_get_total_written(pkt, &startlen) | |
1730 | || !WPACKET_reserve_bytes(pkt, MAX_COOKIE_SIZE, &cookie) | |
1731 | || !WPACKET_put_bytes_u16(pkt, COOKIE_STATE_FORMAT_VERSION) | |
1732 | || !WPACKET_put_bytes_u16(pkt, TLS1_3_VERSION) | |
555cbb32 TS |
1733 | || !WPACKET_put_bytes_u16(pkt, s->s3.group_id) |
1734 | || !s->method->put_cipher_by_char(s->s3.tmp.new_cipher, pkt, | |
43054d3d MC |
1735 | &ciphlen) |
1736 | /* Is there a key_share extension present in this HRR? */ | |
555cbb32 | 1737 | || !WPACKET_put_bytes_u8(pkt, s->s3.peer_tmp == NULL) |
d0debc0a | 1738 | || !WPACKET_put_bytes_u32(pkt, (unsigned int)time(NULL)) |
43054d3d MC |
1739 | || !WPACKET_start_sub_packet_u16(pkt) |
1740 | || !WPACKET_reserve_bytes(pkt, EVP_MAX_MD_SIZE, &hashval1)) { | |
c48ffbcc | 1741 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1742 | return EXT_RETURN_FAIL; |
1743 | } | |
1744 | ||
1745 | /* | |
1746 | * Get the hash of the initial ClientHello. ssl_handshake_hash() operates | |
1747 | * on raw buffers, so we first reserve sufficient bytes (above) and then | |
1748 | * subsequently allocate them (below) | |
1749 | */ | |
1750 | if (!ssl3_digest_cached_records(s, 0) | |
1751 | || !ssl_handshake_hash(s, hashval1, EVP_MAX_MD_SIZE, &hashlen)) { | |
1752 | /* SSLfatal() already called */ | |
1753 | return EXT_RETURN_FAIL; | |
1754 | } | |
1755 | ||
1756 | if (!WPACKET_allocate_bytes(pkt, hashlen, &hashval2) | |
1757 | || !ossl_assert(hashval1 == hashval2) | |
1758 | || !WPACKET_close(pkt) | |
1759 | || !WPACKET_start_sub_packet_u8(pkt) | |
1760 | || !WPACKET_reserve_bytes(pkt, SSL_COOKIE_LENGTH, &appcookie1)) { | |
c48ffbcc | 1761 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1762 | return EXT_RETURN_FAIL; |
1763 | } | |
1764 | ||
1765 | /* Generate the application cookie */ | |
3fa2812f | 1766 | if (s->ctx->gen_stateless_cookie_cb(s, appcookie1, &appcookielen) == 0) { |
c48ffbcc | 1767 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_COOKIE_GEN_CALLBACK_FAILURE); |
43054d3d MC |
1768 | return EXT_RETURN_FAIL; |
1769 | } | |
1770 | ||
1771 | if (!WPACKET_allocate_bytes(pkt, appcookielen, &appcookie2) | |
1772 | || !ossl_assert(appcookie1 == appcookie2) | |
1773 | || !WPACKET_close(pkt) | |
1774 | || !WPACKET_get_total_written(pkt, &totcookielen) | |
1775 | || !WPACKET_reserve_bytes(pkt, SHA256_DIGEST_LENGTH, &hmac)) { | |
c48ffbcc | 1776 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1777 | return EXT_RETURN_FAIL; |
1778 | } | |
1779 | hmaclen = SHA256_DIGEST_LENGTH; | |
1780 | ||
1781 | totcookielen -= startlen; | |
1782 | if (!ossl_assert(totcookielen <= MAX_COOKIE_SIZE - SHA256_DIGEST_LENGTH)) { | |
c48ffbcc | 1783 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1784 | return EXT_RETURN_FAIL; |
1785 | } | |
1786 | ||
1787 | /* HMAC the cookie */ | |
1788 | hctx = EVP_MD_CTX_create(); | |
d8652be0 MC |
1789 | pkey = EVP_PKEY_new_raw_private_key_ex(s->ctx->libctx, "HMAC", |
1790 | s->ctx->propq, | |
1791 | s->session_ctx->ext.cookie_hmac_key, | |
1792 | sizeof(s->session_ctx->ext.cookie_hmac_key)); | |
43054d3d | 1793 | if (hctx == NULL || pkey == NULL) { |
c48ffbcc | 1794 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); |
43054d3d MC |
1795 | goto err; |
1796 | } | |
1797 | ||
d8652be0 MC |
1798 | if (EVP_DigestSignInit_ex(hctx, NULL, "SHA2-256", s->ctx->libctx, |
1799 | s->ctx->propq, pkey) <= 0 | |
43054d3d MC |
1800 | || EVP_DigestSign(hctx, hmac, &hmaclen, cookie, |
1801 | totcookielen) <= 0) { | |
c48ffbcc | 1802 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1803 | goto err; |
1804 | } | |
1805 | ||
1806 | if (!ossl_assert(totcookielen + hmaclen <= MAX_COOKIE_SIZE)) { | |
c48ffbcc | 1807 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1808 | goto err; |
1809 | } | |
1810 | ||
1811 | if (!WPACKET_allocate_bytes(pkt, hmaclen, &hmac2) | |
1812 | || !ossl_assert(hmac == hmac2) | |
1813 | || !ossl_assert(cookie == hmac - totcookielen) | |
1814 | || !WPACKET_close(pkt) | |
1815 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1816 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1817 | goto err; |
1818 | } | |
1819 | ||
1820 | ret = EXT_RETURN_SENT; | |
1821 | ||
1822 | err: | |
1823 | EVP_MD_CTX_free(hctx); | |
1824 | EVP_PKEY_free(pkey); | |
1825 | return ret; | |
1aac20f5 MC |
1826 | #else |
1827 | return EXT_RETURN_FAIL; | |
1828 | #endif | |
43054d3d MC |
1829 | } |
1830 | ||
b186a592 MC |
1831 | EXT_RETURN tls_construct_stoc_cryptopro_bug(SSL *s, WPACKET *pkt, |
1832 | unsigned int context, X509 *x, | |
f63a17d6 | 1833 | size_t chainidx) |
7da160b0 MC |
1834 | { |
1835 | const unsigned char cryptopro_ext[36] = { | |
1836 | 0xfd, 0xe8, /* 65000 */ | |
1837 | 0x00, 0x20, /* 32 bytes length */ | |
1838 | 0x30, 0x1e, 0x30, 0x08, 0x06, 0x06, 0x2a, 0x85, | |
1839 | 0x03, 0x02, 0x02, 0x09, 0x30, 0x08, 0x06, 0x06, | |
1840 | 0x2a, 0x85, 0x03, 0x02, 0x02, 0x16, 0x30, 0x08, | |
1841 | 0x06, 0x06, 0x2a, 0x85, 0x03, 0x02, 0x02, 0x17 | |
1842 | }; | |
1843 | ||
555cbb32 TS |
1844 | if (((s->s3.tmp.new_cipher->id & 0xFFFF) != 0x80 |
1845 | && (s->s3.tmp.new_cipher->id & 0xFFFF) != 0x81) | |
7da160b0 | 1846 | || (SSL_get_options(s) & SSL_OP_CRYPTOPRO_TLSEXT_BUG) == 0) |
b186a592 | 1847 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1848 | |
1849 | if (!WPACKET_memcpy(pkt, cryptopro_ext, sizeof(cryptopro_ext))) { | |
c48ffbcc | 1850 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1851 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1852 | } |
1853 | ||
b186a592 | 1854 | return EXT_RETURN_SENT; |
7da160b0 | 1855 | } |
0247086d | 1856 | |
b186a592 MC |
1857 | EXT_RETURN tls_construct_stoc_early_data(SSL *s, WPACKET *pkt, |
1858 | unsigned int context, X509 *x, | |
f63a17d6 | 1859 | size_t chainidx) |
38df5a45 | 1860 | { |
fe874d27 | 1861 | if (context == SSL_EXT_TLS1_3_NEW_SESSION_TICKET) { |
6594189f | 1862 | if (s->max_early_data == 0) |
b186a592 | 1863 | return EXT_RETURN_NOT_SENT; |
6594189f MC |
1864 | |
1865 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) | |
1866 | || !WPACKET_start_sub_packet_u16(pkt) | |
1867 | || !WPACKET_put_bytes_u32(pkt, s->max_early_data) | |
1868 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1869 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1870 | return EXT_RETURN_FAIL; |
6594189f MC |
1871 | } |
1872 | ||
b186a592 | 1873 | return EXT_RETURN_SENT; |
6594189f MC |
1874 | } |
1875 | ||
38df5a45 | 1876 | if (s->ext.early_data != SSL_EARLY_DATA_ACCEPTED) |
b186a592 | 1877 | return EXT_RETURN_NOT_SENT; |
38df5a45 MC |
1878 | |
1879 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) | |
1880 | || !WPACKET_start_sub_packet_u16(pkt) | |
1881 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1882 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1883 | return EXT_RETURN_FAIL; |
38df5a45 MC |
1884 | } |
1885 | ||
b186a592 | 1886 | return EXT_RETURN_SENT; |
38df5a45 MC |
1887 | } |
1888 | ||
b186a592 | 1889 | EXT_RETURN tls_construct_stoc_psk(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 1890 | X509 *x, size_t chainidx) |
0247086d MC |
1891 | { |
1892 | if (!s->hit) | |
b186a592 | 1893 | return EXT_RETURN_NOT_SENT; |
0247086d MC |
1894 | |
1895 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk) | |
1896 | || !WPACKET_start_sub_packet_u16(pkt) | |
c96ce52c | 1897 | || !WPACKET_put_bytes_u16(pkt, s->ext.tick_identity) |
0247086d | 1898 | || !WPACKET_close(pkt)) { |
c48ffbcc | 1899 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1900 | return EXT_RETURN_FAIL; |
0247086d MC |
1901 | } |
1902 | ||
b186a592 | 1903 | return EXT_RETURN_SENT; |
0247086d | 1904 | } |