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25670f3e | 1 | /* |
fecb3aae | 2 | * Copyright 2016-2022 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 | */ | |
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; | |
47 | ||
48 | /* Parse the length byte */ | |
49 | if (!PACKET_get_1(pkt, &ilen) | |
50 | || !PACKET_get_bytes(pkt, &data, ilen)) { | |
c48ffbcc | 51 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_RENEGOTIATION_ENCODING_ERR); |
25670f3e MC |
52 | return 0; |
53 | } | |
54 | ||
55 | /* Check that the extension matches */ | |
555cbb32 | 56 | if (ilen != s->s3.previous_client_finished_len) { |
c48ffbcc | 57 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_RENEGOTIATION_MISMATCH); |
25670f3e MC |
58 | return 0; |
59 | } | |
60 | ||
555cbb32 TS |
61 | if (memcmp(data, s->s3.previous_client_finished, |
62 | s->s3.previous_client_finished_len)) { | |
c48ffbcc | 63 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_RENEGOTIATION_MISMATCH); |
25670f3e MC |
64 | return 0; |
65 | } | |
66 | ||
555cbb32 | 67 | s->s3.send_connection_binding = 1; |
25670f3e MC |
68 | |
69 | return 1; | |
70 | } | |
71 | ||
1266eefd MC |
72 | /*- |
73 | * The servername extension is treated as follows: | |
74 | * | |
75 | * - Only the hostname type is supported with a maximum length of 255. | |
76 | * - The servername is rejected if too long or if it contains zeros, | |
77 | * in which case an fatal alert is generated. | |
78 | * - The servername field is maintained together with the session cache. | |
79 | * - When a session is resumed, the servername call back invoked in order | |
80 | * to allow the application to position itself to the right context. | |
81 | * - The servername is acknowledged if it is new for a session or when | |
82 | * it is identical to a previously used for the same session. | |
83 | * Applications can control the behaviour. They can at any time | |
84 | * set a 'desirable' servername for a new SSL object. This can be the | |
85 | * case for example with HTTPS when a Host: header field is received and | |
86 | * a renegotiation is requested. In this case, a possible servername | |
87 | * presented in the new client hello is only acknowledged if it matches | |
88 | * the value of the Host: field. | |
89 | * - Applications must use SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION | |
90 | * if they provide for changing an explicit servername context for the | |
91 | * session, i.e. when the session has been established with a servername | |
92 | * extension. | |
93 | * - On session reconnect, the servername extension may be absent. | |
94 | */ | |
38b051a1 TM |
95 | int tls_parse_ctos_server_name(SSL_CONNECTION *s, PACKET *pkt, |
96 | unsigned int context, X509 *x, size_t chainidx) | |
25670f3e MC |
97 | { |
98 | unsigned int servname_type; | |
99 | PACKET sni, hostname; | |
100 | ||
25670f3e MC |
101 | if (!PACKET_as_length_prefixed_2(pkt, &sni) |
102 | /* ServerNameList must be at least 1 byte long. */ | |
103 | || PACKET_remaining(&sni) == 0) { | |
c48ffbcc | 104 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
105 | return 0; |
106 | } | |
107 | ||
108 | /* | |
44e69951 F |
109 | * Although the intent was for server_name to be extensible, RFC 4366 |
110 | * was not clear about it; and so OpenSSL among other implementations, | |
111 | * always and only allows a 'host_name' name types. | |
25670f3e MC |
112 | * RFC 6066 corrected the mistake but adding new name types |
113 | * is nevertheless no longer feasible, so act as if no other | |
114 | * SNI types can exist, to simplify parsing. | |
115 | * | |
116 | * Also note that the RFC permits only one SNI value per type, | |
117 | * i.e., we can only have a single hostname. | |
118 | */ | |
119 | if (!PACKET_get_1(&sni, &servname_type) | |
120 | || servname_type != TLSEXT_NAMETYPE_host_name | |
121 | || !PACKET_as_length_prefixed_2(&sni, &hostname)) { | |
c48ffbcc | 122 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
123 | return 0; |
124 | } | |
125 | ||
7955c1f1 MC |
126 | /* |
127 | * In TLSv1.2 and below the SNI is associated with the session. In TLSv1.3 | |
128 | * we always use the SNI value from the handshake. | |
129 | */ | |
38b051a1 | 130 | if (!s->hit || SSL_CONNECTION_IS_TLS13(s)) { |
25670f3e | 131 | if (PACKET_remaining(&hostname) > TLSEXT_MAXLEN_host_name) { |
c48ffbcc | 132 | SSLfatal(s, SSL_AD_UNRECOGNIZED_NAME, SSL_R_BAD_EXTENSION); |
25670f3e MC |
133 | return 0; |
134 | } | |
135 | ||
136 | if (PACKET_contains_zero_byte(&hostname)) { | |
c48ffbcc | 137 | SSLfatal(s, SSL_AD_UNRECOGNIZED_NAME, SSL_R_BAD_EXTENSION); |
25670f3e MC |
138 | return 0; |
139 | } | |
140 | ||
1c4aa31d BK |
141 | /* |
142 | * Store the requested SNI in the SSL as temporary storage. | |
143 | * If we accept it, it will get stored in the SSL_SESSION as well. | |
144 | */ | |
145 | OPENSSL_free(s->ext.hostname); | |
146 | s->ext.hostname = NULL; | |
147 | if (!PACKET_strndup(&hostname, &s->ext.hostname)) { | |
c48ffbcc | 148 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
149 | return 0; |
150 | } | |
151 | ||
152 | s->servername_done = 1; | |
7955c1f1 MC |
153 | } else { |
154 | /* | |
155 | * In TLSv1.2 and below we should check if the SNI is consistent between | |
156 | * the initial handshake and the resumption. In TLSv1.3 SNI is not | |
157 | * associated with the session. | |
158 | */ | |
1c4aa31d | 159 | s->servername_done = (s->session->ext.hostname != NULL) |
aff8c126 RS |
160 | && PACKET_equal(&hostname, s->session->ext.hostname, |
161 | strlen(s->session->ext.hostname)); | |
25670f3e MC |
162 | } |
163 | ||
164 | return 1; | |
165 | } | |
166 | ||
38b051a1 TM |
167 | int tls_parse_ctos_maxfragmentlen(SSL_CONNECTION *s, PACKET *pkt, |
168 | unsigned int context, | |
f63a17d6 | 169 | X509 *x, size_t chainidx) |
cf72c757 F |
170 | { |
171 | unsigned int value; | |
172 | ||
173 | if (PACKET_remaining(pkt) != 1 || !PACKET_get_1(pkt, &value)) { | |
c48ffbcc | 174 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
cf72c757 F |
175 | return 0; |
176 | } | |
177 | ||
178 | /* Received |value| should be a valid max-fragment-length code. */ | |
179 | if (!IS_MAX_FRAGMENT_LENGTH_EXT_VALID(value)) { | |
f63a17d6 | 180 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 | 181 | SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); |
cf72c757 F |
182 | return 0; |
183 | } | |
184 | ||
185 | /* | |
186 | * RFC 6066: The negotiated length applies for the duration of the session | |
187 | * including session resumptions. | |
188 | * We should receive the same code as in resumed session ! | |
189 | */ | |
190 | if (s->hit && s->session->ext.max_fragment_len_mode != value) { | |
f63a17d6 | 191 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 | 192 | SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); |
cf72c757 F |
193 | return 0; |
194 | } | |
195 | ||
196 | /* | |
197 | * Store it in session, so it'll become binding for us | |
198 | * and we'll include it in a next Server Hello. | |
199 | */ | |
200 | s->session->ext.max_fragment_len_mode = value; | |
201 | return 1; | |
202 | } | |
203 | ||
25670f3e | 204 | #ifndef OPENSSL_NO_SRP |
38b051a1 TM |
205 | int tls_parse_ctos_srp(SSL_CONNECTION *s, PACKET *pkt, unsigned int context, |
206 | X509 *x, size_t chainidx) | |
25670f3e MC |
207 | { |
208 | PACKET srp_I; | |
209 | ||
210 | if (!PACKET_as_length_prefixed_1(pkt, &srp_I) | |
211 | || PACKET_contains_zero_byte(&srp_I)) { | |
c48ffbcc | 212 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
213 | return 0; |
214 | } | |
215 | ||
25670f3e | 216 | if (!PACKET_strndup(&srp_I, &s->srp_ctx.login)) { |
c48ffbcc | 217 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
218 | return 0; |
219 | } | |
220 | ||
221 | return 1; | |
222 | } | |
223 | #endif | |
224 | ||
38b051a1 TM |
225 | int tls_parse_ctos_ec_pt_formats(SSL_CONNECTION *s, PACKET *pkt, |
226 | unsigned int context, | |
f63a17d6 | 227 | X509 *x, size_t chainidx) |
25670f3e MC |
228 | { |
229 | PACKET ec_point_format_list; | |
230 | ||
231 | if (!PACKET_as_length_prefixed_1(pkt, &ec_point_format_list) | |
232 | || PACKET_remaining(&ec_point_format_list) == 0) { | |
c48ffbcc | 233 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
234 | return 0; |
235 | } | |
236 | ||
237 | if (!s->hit) { | |
238 | if (!PACKET_memdup(&ec_point_format_list, | |
cd0fb43c MC |
239 | &s->ext.peer_ecpointformats, |
240 | &s->ext.peer_ecpointformats_len)) { | |
c48ffbcc | 241 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
242 | return 0; |
243 | } | |
244 | } | |
245 | ||
246 | return 1; | |
247 | } | |
25670f3e | 248 | |
38b051a1 TM |
249 | int tls_parse_ctos_session_ticket(SSL_CONNECTION *s, PACKET *pkt, |
250 | unsigned int context, | |
f63a17d6 | 251 | X509 *x, size_t chainidx) |
25670f3e | 252 | { |
aff8c126 | 253 | if (s->ext.session_ticket_cb && |
38b051a1 TM |
254 | !s->ext.session_ticket_cb(SSL_CONNECTION_GET_SSL(s), |
255 | PACKET_data(pkt), PACKET_remaining(pkt), | |
256 | s->ext.session_ticket_cb_arg)) { | |
c48ffbcc | 257 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
258 | return 0; |
259 | } | |
260 | ||
261 | return 1; | |
262 | } | |
263 | ||
38b051a1 | 264 | int tls_parse_ctos_sig_algs_cert(SSL_CONNECTION *s, PACKET *pkt, |
a7e6a3d8 P |
265 | ossl_unused unsigned int context, |
266 | ossl_unused X509 *x, | |
267 | ossl_unused size_t chainidx) | |
c589c34e BK |
268 | { |
269 | PACKET supported_sig_algs; | |
270 | ||
271 | if (!PACKET_as_length_prefixed_2(pkt, &supported_sig_algs) | |
272 | || PACKET_remaining(&supported_sig_algs) == 0) { | |
c48ffbcc | 273 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
c589c34e BK |
274 | return 0; |
275 | } | |
276 | ||
277 | if (!s->hit && !tls1_save_sigalgs(s, &supported_sig_algs, 1)) { | |
c48ffbcc | 278 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
c589c34e BK |
279 | return 0; |
280 | } | |
281 | ||
282 | return 1; | |
283 | } | |
284 | ||
38b051a1 TM |
285 | int tls_parse_ctos_sig_algs(SSL_CONNECTION *s, PACKET *pkt, |
286 | unsigned int context, X509 *x, size_t chainidx) | |
25670f3e MC |
287 | { |
288 | PACKET supported_sig_algs; | |
289 | ||
290 | if (!PACKET_as_length_prefixed_2(pkt, &supported_sig_algs) | |
25670f3e | 291 | || PACKET_remaining(&supported_sig_algs) == 0) { |
c48ffbcc | 292 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
293 | return 0; |
294 | } | |
295 | ||
c589c34e | 296 | if (!s->hit && !tls1_save_sigalgs(s, &supported_sig_algs, 0)) { |
c48ffbcc | 297 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
298 | return 0; |
299 | } | |
300 | ||
301 | return 1; | |
302 | } | |
303 | ||
ab83e314 | 304 | #ifndef OPENSSL_NO_OCSP |
38b051a1 TM |
305 | int tls_parse_ctos_status_request(SSL_CONNECTION *s, PACKET *pkt, |
306 | unsigned int context, | |
f63a17d6 | 307 | X509 *x, size_t chainidx) |
25670f3e | 308 | { |
1266eefd MC |
309 | PACKET responder_id_list, exts; |
310 | ||
ded4a83d MC |
311 | /* We ignore this in a resumption handshake */ |
312 | if (s->hit) | |
313 | return 1; | |
314 | ||
e96e0f8e MC |
315 | /* Not defined if we get one of these in a client Certificate */ |
316 | if (x != NULL) | |
317 | return 1; | |
318 | ||
aff8c126 | 319 | if (!PACKET_get_1(pkt, (unsigned int *)&s->ext.status_type)) { |
c48ffbcc | 320 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
321 | return 0; |
322 | } | |
ab83e314 | 323 | |
aff8c126 | 324 | if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) { |
25670f3e | 325 | /* |
1266eefd | 326 | * We don't know what to do with any other type so ignore it. |
25670f3e | 327 | */ |
aff8c126 | 328 | s->ext.status_type = TLSEXT_STATUSTYPE_nothing; |
1266eefd MC |
329 | return 1; |
330 | } | |
25670f3e | 331 | |
1266eefd | 332 | if (!PACKET_get_length_prefixed_2 (pkt, &responder_id_list)) { |
c48ffbcc | 333 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1266eefd MC |
334 | return 0; |
335 | } | |
25670f3e | 336 | |
1266eefd MC |
337 | /* |
338 | * We remove any OCSP_RESPIDs from a previous handshake | |
339 | * to prevent unbounded memory growth - CVE-2016-6304 | |
340 | */ | |
aff8c126 | 341 | sk_OCSP_RESPID_pop_free(s->ext.ocsp.ids, OCSP_RESPID_free); |
1266eefd | 342 | if (PACKET_remaining(&responder_id_list) > 0) { |
aff8c126 RS |
343 | s->ext.ocsp.ids = sk_OCSP_RESPID_new_null(); |
344 | if (s->ext.ocsp.ids == NULL) { | |
c48ffbcc | 345 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); |
1266eefd MC |
346 | return 0; |
347 | } | |
348 | } else { | |
aff8c126 | 349 | s->ext.ocsp.ids = NULL; |
1266eefd | 350 | } |
25670f3e | 351 | |
1266eefd MC |
352 | while (PACKET_remaining(&responder_id_list) > 0) { |
353 | OCSP_RESPID *id; | |
354 | PACKET responder_id; | |
355 | const unsigned char *id_data; | |
25670f3e | 356 | |
1266eefd MC |
357 | if (!PACKET_get_length_prefixed_2(&responder_id_list, &responder_id) |
358 | || PACKET_remaining(&responder_id) == 0) { | |
c48ffbcc | 359 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1266eefd MC |
360 | return 0; |
361 | } | |
25670f3e | 362 | |
1266eefd | 363 | id_data = PACKET_data(&responder_id); |
1266eefd MC |
364 | id = d2i_OCSP_RESPID(NULL, &id_data, |
365 | (int)PACKET_remaining(&responder_id)); | |
366 | if (id == NULL) { | |
c48ffbcc | 367 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1266eefd | 368 | return 0; |
25670f3e MC |
369 | } |
370 | ||
1266eefd MC |
371 | if (id_data != PACKET_end(&responder_id)) { |
372 | OCSP_RESPID_free(id); | |
c48ffbcc | 373 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
f63a17d6 | 374 | |
25670f3e MC |
375 | return 0; |
376 | } | |
377 | ||
aff8c126 | 378 | if (!sk_OCSP_RESPID_push(s->ext.ocsp.ids, id)) { |
1266eefd | 379 | OCSP_RESPID_free(id); |
c48ffbcc | 380 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f63a17d6 | 381 | |
1266eefd MC |
382 | return 0; |
383 | } | |
384 | } | |
385 | ||
386 | /* Read in request_extensions */ | |
387 | if (!PACKET_as_length_prefixed_2(pkt, &exts)) { | |
c48ffbcc | 388 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1266eefd MC |
389 | return 0; |
390 | } | |
391 | ||
392 | if (PACKET_remaining(&exts) > 0) { | |
393 | const unsigned char *ext_data = PACKET_data(&exts); | |
394 | ||
aff8c126 | 395 | sk_X509_EXTENSION_pop_free(s->ext.ocsp.exts, |
1266eefd | 396 | X509_EXTENSION_free); |
aff8c126 | 397 | s->ext.ocsp.exts = |
1266eefd | 398 | d2i_X509_EXTENSIONS(NULL, &ext_data, (int)PACKET_remaining(&exts)); |
aff8c126 | 399 | if (s->ext.ocsp.exts == NULL || ext_data != PACKET_end(&exts)) { |
c48ffbcc | 400 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1266eefd | 401 | return 0; |
25670f3e | 402 | } |
25670f3e MC |
403 | } |
404 | ||
405 | return 1; | |
406 | } | |
ab83e314 | 407 | #endif |
25670f3e MC |
408 | |
409 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
38b051a1 TM |
410 | int tls_parse_ctos_npn(SSL_CONNECTION *s, PACKET *pkt, unsigned int context, |
411 | X509 *x, size_t chainidx) | |
25670f3e | 412 | { |
1266eefd MC |
413 | /* |
414 | * We shouldn't accept this extension on a | |
415 | * renegotiation. | |
1266eefd | 416 | */ |
c7f47786 | 417 | if (SSL_IS_FIRST_HANDSHAKE(s)) |
555cbb32 | 418 | s->s3.npn_seen = 1; |
25670f3e MC |
419 | |
420 | return 1; | |
421 | } | |
422 | #endif | |
423 | ||
424 | /* | |
1266eefd | 425 | * Save the ALPN extension in a ClientHello.|pkt| holds the contents of the ALPN |
29bfd5b7 | 426 | * extension, not including type and length. Returns: 1 on success, 0 on error. |
25670f3e | 427 | */ |
38b051a1 TM |
428 | int tls_parse_ctos_alpn(SSL_CONNECTION *s, PACKET *pkt, unsigned int context, |
429 | X509 *x, size_t chainidx) | |
25670f3e MC |
430 | { |
431 | PACKET protocol_list, save_protocol_list, protocol; | |
432 | ||
c7f47786 | 433 | if (!SSL_IS_FIRST_HANDSHAKE(s)) |
25670f3e MC |
434 | return 1; |
435 | ||
436 | if (!PACKET_as_length_prefixed_2(pkt, &protocol_list) | |
437 | || PACKET_remaining(&protocol_list) < 2) { | |
c48ffbcc | 438 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
439 | return 0; |
440 | } | |
441 | ||
442 | save_protocol_list = protocol_list; | |
443 | do { | |
444 | /* Protocol names can't be empty. */ | |
445 | if (!PACKET_get_length_prefixed_1(&protocol_list, &protocol) | |
446 | || PACKET_remaining(&protocol) == 0) { | |
c48ffbcc | 447 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
448 | return 0; |
449 | } | |
450 | } while (PACKET_remaining(&protocol_list) != 0); | |
451 | ||
555cbb32 TS |
452 | OPENSSL_free(s->s3.alpn_proposed); |
453 | s->s3.alpn_proposed = NULL; | |
454 | s->s3.alpn_proposed_len = 0; | |
25670f3e | 455 | if (!PACKET_memdup(&save_protocol_list, |
555cbb32 | 456 | &s->s3.alpn_proposed, &s->s3.alpn_proposed_len)) { |
c48ffbcc | 457 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
458 | return 0; |
459 | } | |
460 | ||
461 | return 1; | |
462 | } | |
463 | ||
464 | #ifndef OPENSSL_NO_SRTP | |
38b051a1 TM |
465 | int tls_parse_ctos_use_srtp(SSL_CONNECTION *s, PACKET *pkt, |
466 | unsigned int context, X509 *x, size_t chainidx) | |
25670f3e | 467 | { |
25670f3e MC |
468 | STACK_OF(SRTP_PROTECTION_PROFILE) *srvr; |
469 | unsigned int ct, mki_len, id; | |
470 | int i, srtp_pref; | |
471 | PACKET subpkt; | |
38b051a1 | 472 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
25670f3e MC |
473 | |
474 | /* Ignore this if we have no SRTP profiles */ | |
38b051a1 | 475 | if (SSL_get_srtp_profiles(ssl) == NULL) |
25670f3e MC |
476 | return 1; |
477 | ||
478 | /* Pull off the length of the cipher suite list and check it is even */ | |
1266eefd MC |
479 | if (!PACKET_get_net_2(pkt, &ct) || (ct & 1) != 0 |
480 | || !PACKET_get_sub_packet(pkt, &subpkt, ct)) { | |
c48ffbcc | 481 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
25670f3e | 482 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
25670f3e MC |
483 | return 0; |
484 | } | |
485 | ||
38b051a1 | 486 | srvr = SSL_get_srtp_profiles(ssl); |
25670f3e MC |
487 | s->srtp_profile = NULL; |
488 | /* Search all profiles for a match initially */ | |
489 | srtp_pref = sk_SRTP_PROTECTION_PROFILE_num(srvr); | |
490 | ||
491 | while (PACKET_remaining(&subpkt)) { | |
492 | if (!PACKET_get_net_2(&subpkt, &id)) { | |
c48ffbcc | 493 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
f63a17d6 | 494 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
25670f3e MC |
495 | return 0; |
496 | } | |
497 | ||
498 | /* | |
499 | * Only look for match in profiles of higher preference than | |
500 | * current match. | |
501 | * If no profiles have been have been configured then this | |
502 | * does nothing. | |
503 | */ | |
504 | for (i = 0; i < srtp_pref; i++) { | |
d270de32 | 505 | SRTP_PROTECTION_PROFILE *sprof = |
1266eefd MC |
506 | sk_SRTP_PROTECTION_PROFILE_value(srvr, i); |
507 | ||
25670f3e MC |
508 | if (sprof->id == id) { |
509 | s->srtp_profile = sprof; | |
510 | srtp_pref = i; | |
511 | break; | |
512 | } | |
513 | } | |
514 | } | |
515 | ||
1266eefd | 516 | /* Now extract the MKI value as a sanity check, but discard it for now */ |
25670f3e | 517 | if (!PACKET_get_1(pkt, &mki_len)) { |
c48ffbcc | 518 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
f63a17d6 | 519 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
25670f3e MC |
520 | return 0; |
521 | } | |
522 | ||
523 | if (!PACKET_forward(pkt, mki_len) | |
524 | || PACKET_remaining(pkt)) { | |
c48ffbcc | 525 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_SRTP_MKI_VALUE); |
25670f3e MC |
526 | return 0; |
527 | } | |
528 | ||
529 | return 1; | |
530 | } | |
531 | #endif | |
532 | ||
38b051a1 TM |
533 | int tls_parse_ctos_etm(SSL_CONNECTION *s, PACKET *pkt, unsigned int context, |
534 | X509 *x, size_t chainidx) | |
25670f3e MC |
535 | { |
536 | if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC)) | |
28a31a0a | 537 | s->ext.use_etm = 1; |
25670f3e MC |
538 | |
539 | return 1; | |
540 | } | |
541 | ||
b2f7e8c0 MC |
542 | /* |
543 | * Process a psk_kex_modes extension received in the ClientHello. |pkt| contains | |
544 | * the raw PACKET data for the extension. Returns 1 on success or 0 on failure. | |
b2f7e8c0 | 545 | */ |
38b051a1 TM |
546 | int tls_parse_ctos_psk_kex_modes(SSL_CONNECTION *s, PACKET *pkt, |
547 | unsigned int context, | |
f63a17d6 | 548 | X509 *x, size_t chainidx) |
b2f7e8c0 MC |
549 | { |
550 | #ifndef OPENSSL_NO_TLS1_3 | |
551 | PACKET psk_kex_modes; | |
552 | unsigned int mode; | |
553 | ||
554 | if (!PACKET_as_length_prefixed_1(pkt, &psk_kex_modes) | |
555 | || PACKET_remaining(&psk_kex_modes) == 0) { | |
c48ffbcc | 556 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
b2f7e8c0 MC |
557 | return 0; |
558 | } | |
559 | ||
560 | while (PACKET_get_1(&psk_kex_modes, &mode)) { | |
561 | if (mode == TLSEXT_KEX_MODE_KE_DHE) | |
562 | s->ext.psk_kex_mode |= TLSEXT_KEX_MODE_FLAG_KE_DHE; | |
e3c0d76b MC |
563 | else if (mode == TLSEXT_KEX_MODE_KE |
564 | && (s->options & SSL_OP_ALLOW_NO_DHE_KEX) != 0) | |
b2f7e8c0 MC |
565 | s->ext.psk_kex_mode |= TLSEXT_KEX_MODE_FLAG_KE; |
566 | } | |
567 | #endif | |
568 | ||
569 | return 1; | |
570 | } | |
571 | ||
25670f3e MC |
572 | /* |
573 | * Process a key_share extension received in the ClientHello. |pkt| contains | |
574 | * the raw PACKET data for the extension. Returns 1 on success or 0 on failure. | |
25670f3e | 575 | */ |
38b051a1 TM |
576 | int tls_parse_ctos_key_share(SSL_CONNECTION *s, PACKET *pkt, |
577 | unsigned int context, X509 *x, size_t chainidx) | |
25670f3e | 578 | { |
3cf96e88 | 579 | #ifndef OPENSSL_NO_TLS1_3 |
25670f3e MC |
580 | unsigned int group_id; |
581 | PACKET key_share_list, encoded_pt; | |
f48d826e DSH |
582 | const uint16_t *clntgroups, *srvrgroups; |
583 | size_t clnt_num_groups, srvr_num_groups; | |
43b95d73 | 584 | int found = 0; |
25670f3e | 585 | |
f4bbb37c | 586 | if (s->hit && (s->ext.psk_kex_mode & TLSEXT_KEX_MODE_FLAG_KE_DHE) == 0) |
25670f3e MC |
587 | return 1; |
588 | ||
589 | /* Sanity check */ | |
555cbb32 | 590 | if (s->s3.peer_tmp != NULL) { |
c48ffbcc | 591 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
592 | return 0; |
593 | } | |
594 | ||
595 | if (!PACKET_as_length_prefixed_2(pkt, &key_share_list)) { | |
c48ffbcc | 596 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
25670f3e MC |
597 | return 0; |
598 | } | |
599 | ||
f48d826e DSH |
600 | /* Get our list of supported groups */ |
601 | tls1_get_supported_groups(s, &srvrgroups, &srvr_num_groups); | |
602 | /* Get the clients list of supported groups. */ | |
603 | tls1_get_peer_groups(s, &clntgroups, &clnt_num_groups); | |
604 | if (clnt_num_groups == 0) { | |
b6fdc12d MC |
605 | /* |
606 | * This can only happen if the supported_groups extension was not sent, | |
607 | * because we verify that the length is non-zero when we process that | |
608 | * extension. | |
609 | */ | |
c48ffbcc | 610 | SSLfatal(s, SSL_AD_MISSING_EXTENSION, |
f63a17d6 | 611 | SSL_R_MISSING_SUPPORTED_GROUPS_EXTENSION); |
b6fdc12d MC |
612 | return 0; |
613 | } | |
25670f3e | 614 | |
555cbb32 | 615 | if (s->s3.group_id != 0 && PACKET_remaining(&key_share_list) == 0) { |
43054d3d MC |
616 | /* |
617 | * If we set a group_id already, then we must have sent an HRR | |
618 | * requesting a new key_share. If we haven't got one then that is an | |
619 | * error | |
620 | */ | |
c48ffbcc | 621 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_KEY_SHARE); |
43054d3d MC |
622 | return 0; |
623 | } | |
624 | ||
25670f3e MC |
625 | while (PACKET_remaining(&key_share_list) > 0) { |
626 | if (!PACKET_get_net_2(&key_share_list, &group_id) | |
627 | || !PACKET_get_length_prefixed_2(&key_share_list, &encoded_pt) | |
628 | || PACKET_remaining(&encoded_pt) == 0) { | |
c48ffbcc | 629 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
25670f3e MC |
630 | return 0; |
631 | } | |
632 | ||
633 | /* | |
634 | * If we already found a suitable key_share we loop through the | |
635 | * rest to verify the structure, but don't process them. | |
636 | */ | |
637 | if (found) | |
638 | continue; | |
639 | ||
43054d3d MC |
640 | /* |
641 | * If we sent an HRR then the key_share sent back MUST be for the group | |
642 | * we requested, and must be the only key_share sent. | |
643 | */ | |
555cbb32 | 644 | if (s->s3.group_id != 0 |
0a10825a | 645 | && (ssl_group_id_tls13_to_internal(group_id) != s->s3.group_id |
43054d3d | 646 | || PACKET_remaining(&key_share_list) != 0)) { |
c48ffbcc | 647 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_KEY_SHARE); |
43054d3d MC |
648 | return 0; |
649 | } | |
650 | ||
25670f3e | 651 | /* Check if this share is in supported_groups sent from client */ |
f48d826e | 652 | if (!check_in_list(s, group_id, clntgroups, clnt_num_groups, 0)) { |
c48ffbcc | 653 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_KEY_SHARE); |
25670f3e MC |
654 | return 0; |
655 | } | |
656 | ||
657 | /* Check if this share is for a group we can use */ | |
f48d826e | 658 | if (!check_in_list(s, group_id, srvrgroups, srvr_num_groups, 1)) { |
25670f3e MC |
659 | /* Share not suitable */ |
660 | continue; | |
661 | } | |
662 | ||
0a10825a BE |
663 | s->s3.group_id = group_id; |
664 | /* Cache the selected group ID in the SSL_SESSION */ | |
665 | s->session->kex_group = group_id; | |
666 | ||
667 | group_id = ssl_group_id_tls13_to_internal(group_id); | |
668 | ||
ada66e78 | 669 | if ((s->s3.peer_tmp = ssl_generate_param_group(s, group_id)) == NULL) { |
c48ffbcc | 670 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
25670f3e MC |
671 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
672 | return 0; | |
673 | } | |
674 | ||
d5530efa TM |
675 | if (tls13_set_encoded_pub_key(s->s3.peer_tmp, |
676 | PACKET_data(&encoded_pt), | |
677 | PACKET_remaining(&encoded_pt)) <= 0) { | |
c48ffbcc | 678 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_ECPOINT); |
25670f3e MC |
679 | return 0; |
680 | } | |
681 | ||
682 | found = 1; | |
683 | } | |
3cf96e88 | 684 | #endif |
25670f3e MC |
685 | |
686 | return 1; | |
687 | } | |
688 | ||
38b051a1 TM |
689 | int tls_parse_ctos_cookie(SSL_CONNECTION *s, PACKET *pkt, unsigned int context, |
690 | X509 *x, size_t chainidx) | |
43054d3d | 691 | { |
1aac20f5 | 692 | #ifndef OPENSSL_NO_TLS1_3 |
dd77962e | 693 | unsigned int format, version, key_share, group_id; |
43054d3d MC |
694 | EVP_MD_CTX *hctx; |
695 | EVP_PKEY *pkey; | |
696 | PACKET cookie, raw, chhash, appcookie; | |
697 | WPACKET hrrpkt; | |
698 | const unsigned char *data, *mdin, *ciphdata; | |
699 | unsigned char hmac[SHA256_DIGEST_LENGTH]; | |
700 | unsigned char hrr[MAX_HRR_SIZE]; | |
701 | size_t rawlen, hmaclen, hrrlen, ciphlen; | |
d0debc0a | 702 | unsigned long tm, now; |
38b051a1 TM |
703 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
704 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); | |
43054d3d MC |
705 | |
706 | /* Ignore any cookie if we're not set up to verify it */ | |
38b051a1 | 707 | if (sctx->verify_stateless_cookie_cb == NULL |
555cbb32 | 708 | || (s->s3.flags & TLS1_FLAGS_STATELESS) == 0) |
43054d3d MC |
709 | return 1; |
710 | ||
711 | if (!PACKET_as_length_prefixed_2(pkt, &cookie)) { | |
c48ffbcc | 712 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
713 | return 0; |
714 | } | |
715 | ||
716 | raw = cookie; | |
717 | data = PACKET_data(&raw); | |
718 | rawlen = PACKET_remaining(&raw); | |
719 | if (rawlen < SHA256_DIGEST_LENGTH | |
720 | || !PACKET_forward(&raw, rawlen - SHA256_DIGEST_LENGTH)) { | |
c48ffbcc | 721 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
722 | return 0; |
723 | } | |
724 | mdin = PACKET_data(&raw); | |
725 | ||
726 | /* Verify the HMAC of the cookie */ | |
727 | hctx = EVP_MD_CTX_create(); | |
38b051a1 TM |
728 | pkey = EVP_PKEY_new_raw_private_key_ex(sctx->libctx, "HMAC", |
729 | sctx->propq, | |
d8652be0 MC |
730 | s->session_ctx->ext.cookie_hmac_key, |
731 | sizeof(s->session_ctx->ext.cookie_hmac_key)); | |
43054d3d MC |
732 | if (hctx == NULL || pkey == NULL) { |
733 | EVP_MD_CTX_free(hctx); | |
734 | EVP_PKEY_free(pkey); | |
c48ffbcc | 735 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); |
43054d3d MC |
736 | return 0; |
737 | } | |
738 | ||
97ea1e7f | 739 | hmaclen = SHA256_DIGEST_LENGTH; |
38b051a1 TM |
740 | if (EVP_DigestSignInit_ex(hctx, NULL, "SHA2-256", sctx->libctx, |
741 | sctx->propq, pkey, NULL) <= 0 | |
97ea1e7f MC |
742 | || EVP_DigestSign(hctx, hmac, &hmaclen, data, |
743 | rawlen - SHA256_DIGEST_LENGTH) <= 0 | |
43054d3d MC |
744 | || hmaclen != SHA256_DIGEST_LENGTH) { |
745 | EVP_MD_CTX_free(hctx); | |
746 | EVP_PKEY_free(pkey); | |
c48ffbcc | 747 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
748 | return 0; |
749 | } | |
750 | ||
751 | EVP_MD_CTX_free(hctx); | |
752 | EVP_PKEY_free(pkey); | |
753 | ||
754 | if (CRYPTO_memcmp(hmac, mdin, SHA256_DIGEST_LENGTH) != 0) { | |
c48ffbcc | 755 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_COOKIE_MISMATCH); |
43054d3d MC |
756 | return 0; |
757 | } | |
758 | ||
759 | if (!PACKET_get_net_2(&cookie, &format)) { | |
c48ffbcc | 760 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
761 | return 0; |
762 | } | |
763 | /* Check the cookie format is something we recognise. Ignore it if not */ | |
764 | if (format != COOKIE_STATE_FORMAT_VERSION) | |
765 | return 1; | |
766 | ||
767 | /* | |
768 | * The rest of these checks really shouldn't fail since we have verified the | |
769 | * HMAC above. | |
770 | */ | |
771 | ||
772 | /* Check the version number is sane */ | |
773 | if (!PACKET_get_net_2(&cookie, &version)) { | |
c48ffbcc | 774 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
775 | return 0; |
776 | } | |
777 | if (version != TLS1_3_VERSION) { | |
c48ffbcc | 778 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
43054d3d MC |
779 | SSL_R_BAD_PROTOCOL_VERSION_NUMBER); |
780 | return 0; | |
781 | } | |
782 | ||
dd77962e | 783 | if (!PACKET_get_net_2(&cookie, &group_id)) { |
c48ffbcc | 784 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
785 | return 0; |
786 | } | |
dd77962e | 787 | |
43054d3d MC |
788 | ciphdata = PACKET_data(&cookie); |
789 | if (!PACKET_forward(&cookie, 2)) { | |
c48ffbcc | 790 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
791 | return 0; |
792 | } | |
555cbb32 TS |
793 | if (group_id != s->s3.group_id |
794 | || s->s3.tmp.new_cipher | |
dd77962e MC |
795 | != ssl_get_cipher_by_char(s, ciphdata, 0)) { |
796 | /* | |
797 | * We chose a different cipher or group id this time around to what is | |
798 | * in the cookie. Something must have changed. | |
799 | */ | |
c48ffbcc | 800 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_CIPHER); |
43054d3d MC |
801 | return 0; |
802 | } | |
803 | ||
804 | if (!PACKET_get_1(&cookie, &key_share) | |
d0debc0a | 805 | || !PACKET_get_net_4(&cookie, &tm) |
43054d3d MC |
806 | || !PACKET_get_length_prefixed_2(&cookie, &chhash) |
807 | || !PACKET_get_length_prefixed_1(&cookie, &appcookie) | |
808 | || PACKET_remaining(&cookie) != SHA256_DIGEST_LENGTH) { | |
c48ffbcc | 809 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
810 | return 0; |
811 | } | |
812 | ||
d0debc0a MC |
813 | /* We tolerate a cookie age of up to 10 minutes (= 60 * 10 seconds) */ |
814 | now = (unsigned long)time(NULL); | |
815 | if (tm > now || (now - tm) > 600) { | |
816 | /* Cookie is stale. Ignore it */ | |
817 | return 1; | |
818 | } | |
819 | ||
43054d3d | 820 | /* Verify the app cookie */ |
38b051a1 TM |
821 | if (sctx->verify_stateless_cookie_cb(ssl, |
822 | PACKET_data(&appcookie), | |
823 | PACKET_remaining(&appcookie)) == 0) { | |
c48ffbcc | 824 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_COOKIE_MISMATCH); |
43054d3d MC |
825 | return 0; |
826 | } | |
827 | ||
828 | /* | |
829 | * Reconstruct the HRR that we would have sent in response to the original | |
830 | * ClientHello so we can add it to the transcript hash. | |
831 | * Note: This won't work with custom HRR extensions | |
832 | */ | |
833 | if (!WPACKET_init_static_len(&hrrpkt, hrr, sizeof(hrr), 0)) { | |
c48ffbcc | 834 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
835 | return 0; |
836 | } | |
837 | if (!WPACKET_put_bytes_u8(&hrrpkt, SSL3_MT_SERVER_HELLO) | |
838 | || !WPACKET_start_sub_packet_u24(&hrrpkt) | |
839 | || !WPACKET_put_bytes_u16(&hrrpkt, TLS1_2_VERSION) | |
840 | || !WPACKET_memcpy(&hrrpkt, hrrrandom, SSL3_RANDOM_SIZE) | |
841 | || !WPACKET_sub_memcpy_u8(&hrrpkt, s->tmp_session_id, | |
842 | s->tmp_session_id_len) | |
38b051a1 TM |
843 | || !ssl->method->put_cipher_by_char(s->s3.tmp.new_cipher, &hrrpkt, |
844 | &ciphlen) | |
43054d3d MC |
845 | || !WPACKET_put_bytes_u8(&hrrpkt, 0) |
846 | || !WPACKET_start_sub_packet_u16(&hrrpkt)) { | |
847 | WPACKET_cleanup(&hrrpkt); | |
c48ffbcc | 848 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
849 | return 0; |
850 | } | |
851 | if (!WPACKET_put_bytes_u16(&hrrpkt, TLSEXT_TYPE_supported_versions) | |
852 | || !WPACKET_start_sub_packet_u16(&hrrpkt) | |
35e742ec | 853 | || !WPACKET_put_bytes_u16(&hrrpkt, s->version) |
43054d3d MC |
854 | || !WPACKET_close(&hrrpkt)) { |
855 | WPACKET_cleanup(&hrrpkt); | |
c48ffbcc | 856 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
857 | return 0; |
858 | } | |
859 | if (key_share) { | |
860 | if (!WPACKET_put_bytes_u16(&hrrpkt, TLSEXT_TYPE_key_share) | |
861 | || !WPACKET_start_sub_packet_u16(&hrrpkt) | |
555cbb32 | 862 | || !WPACKET_put_bytes_u16(&hrrpkt, s->s3.group_id) |
43054d3d MC |
863 | || !WPACKET_close(&hrrpkt)) { |
864 | WPACKET_cleanup(&hrrpkt); | |
c48ffbcc | 865 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
866 | return 0; |
867 | } | |
868 | } | |
869 | if (!WPACKET_put_bytes_u16(&hrrpkt, TLSEXT_TYPE_cookie) | |
870 | || !WPACKET_start_sub_packet_u16(&hrrpkt) | |
871 | || !WPACKET_sub_memcpy_u16(&hrrpkt, data, rawlen) | |
872 | || !WPACKET_close(&hrrpkt) /* cookie extension */ | |
873 | || !WPACKET_close(&hrrpkt) /* extension block */ | |
874 | || !WPACKET_close(&hrrpkt) /* message */ | |
875 | || !WPACKET_get_total_written(&hrrpkt, &hrrlen) | |
876 | || !WPACKET_finish(&hrrpkt)) { | |
877 | WPACKET_cleanup(&hrrpkt); | |
c48ffbcc | 878 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
879 | return 0; |
880 | } | |
881 | ||
882 | /* Reconstruct the transcript hash */ | |
883 | if (!create_synthetic_message_hash(s, PACKET_data(&chhash), | |
884 | PACKET_remaining(&chhash), hrr, | |
885 | hrrlen)) { | |
886 | /* SSLfatal() already called */ | |
887 | return 0; | |
888 | } | |
889 | ||
890 | /* Act as if this ClientHello came after a HelloRetryRequest */ | |
891 | s->hello_retry_request = 1; | |
892 | ||
c36001c3 | 893 | s->ext.cookieok = 1; |
1aac20f5 | 894 | #endif |
c36001c3 | 895 | |
43054d3d MC |
896 | return 1; |
897 | } | |
898 | ||
38b051a1 TM |
899 | int tls_parse_ctos_supported_groups(SSL_CONNECTION *s, PACKET *pkt, |
900 | unsigned int context, | |
f63a17d6 | 901 | X509 *x, size_t chainidx) |
25670f3e MC |
902 | { |
903 | PACKET supported_groups_list; | |
904 | ||
905 | /* Each group is 2 bytes and we must have at least 1. */ | |
906 | if (!PACKET_as_length_prefixed_2(pkt, &supported_groups_list) | |
907 | || PACKET_remaining(&supported_groups_list) == 0 | |
908 | || (PACKET_remaining(&supported_groups_list) % 2) != 0) { | |
c48ffbcc | 909 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
910 | return 0; |
911 | } | |
912 | ||
38b051a1 | 913 | if (!s->hit || SSL_CONNECTION_IS_TLS13(s)) { |
45436e61 MC |
914 | OPENSSL_free(s->ext.peer_supportedgroups); |
915 | s->ext.peer_supportedgroups = NULL; | |
916 | s->ext.peer_supportedgroups_len = 0; | |
9e84a42d | 917 | if (!tls1_save_u16(&supported_groups_list, |
45436e61 MC |
918 | &s->ext.peer_supportedgroups, |
919 | &s->ext.peer_supportedgroups_len)) { | |
c48ffbcc | 920 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
e3743355 BK |
921 | return 0; |
922 | } | |
25670f3e MC |
923 | } |
924 | ||
925 | return 1; | |
926 | } | |
25670f3e | 927 | |
38b051a1 TM |
928 | int tls_parse_ctos_ems(SSL_CONNECTION *s, PACKET *pkt, unsigned int context, |
929 | X509 *x, size_t chainidx) | |
25670f3e MC |
930 | { |
931 | /* The extension must always be empty */ | |
932 | if (PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 933 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
934 | return 0; |
935 | } | |
936 | ||
088dfa13 TS |
937 | if (s->options & SSL_OP_NO_EXTENDED_MASTER_SECRET) |
938 | return 1; | |
939 | ||
555cbb32 | 940 | s->s3.flags |= TLS1_FLAGS_RECEIVED_EXTMS; |
25670f3e MC |
941 | |
942 | return 1; | |
943 | } | |
7da160b0 | 944 | |
38df5a45 | 945 | |
38b051a1 | 946 | int tls_parse_ctos_early_data(SSL_CONNECTION *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 947 | X509 *x, size_t chainidx) |
38df5a45 MC |
948 | { |
949 | if (PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 950 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
38df5a45 MC |
951 | return 0; |
952 | } | |
953 | ||
fc7129dc | 954 | if (s->hello_retry_request != SSL_HRR_NONE) { |
c48ffbcc | 955 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_EXTENSION); |
d4504fe5 MC |
956 | return 0; |
957 | } | |
958 | ||
38df5a45 MC |
959 | return 1; |
960 | } | |
961 | ||
38b051a1 | 962 | static SSL_TICKET_STATUS tls_get_stateful_ticket(SSL_CONNECTION *s, PACKET *tick, |
6cc0b3c2 MC |
963 | SSL_SESSION **sess) |
964 | { | |
965 | SSL_SESSION *tmpsess = NULL; | |
966 | ||
5f26ddff MC |
967 | s->ext.ticket_expected = 1; |
968 | ||
6cc0b3c2 MC |
969 | switch (PACKET_remaining(tick)) { |
970 | case 0: | |
971 | return SSL_TICKET_EMPTY; | |
972 | ||
973 | case SSL_MAX_SSL_SESSION_ID_LENGTH: | |
974 | break; | |
975 | ||
976 | default: | |
977 | return SSL_TICKET_NO_DECRYPT; | |
978 | } | |
979 | ||
980 | tmpsess = lookup_sess_in_cache(s, PACKET_data(tick), | |
981 | SSL_MAX_SSL_SESSION_ID_LENGTH); | |
982 | ||
983 | if (tmpsess == NULL) | |
984 | return SSL_TICKET_NO_DECRYPT; | |
985 | ||
6cc0b3c2 MC |
986 | *sess = tmpsess; |
987 | return SSL_TICKET_SUCCESS; | |
988 | } | |
989 | ||
38b051a1 TM |
990 | int tls_parse_ctos_psk(SSL_CONNECTION *s, PACKET *pkt, unsigned int context, |
991 | X509 *x, size_t chainidx) | |
1053a6e2 MC |
992 | { |
993 | PACKET identities, binders, binder; | |
994 | size_t binderoffset, hashsize; | |
995 | SSL_SESSION *sess = NULL; | |
3a7c56b2 | 996 | unsigned int id, i, ext = 0; |
1053a6e2 | 997 | const EVP_MD *md = NULL; |
38b051a1 TM |
998 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
999 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); | |
1053a6e2 | 1000 | |
1a9f457c MC |
1001 | /* |
1002 | * If we have no PSK kex mode that we recognise then we can't resume so | |
1003 | * ignore this extension | |
1004 | */ | |
1005 | if ((s->ext.psk_kex_mode | |
1006 | & (TLSEXT_KEX_MODE_FLAG_KE | TLSEXT_KEX_MODE_FLAG_KE_DHE)) == 0) | |
1007 | return 1; | |
1008 | ||
1053a6e2 | 1009 | if (!PACKET_get_length_prefixed_2(pkt, &identities)) { |
c48ffbcc | 1010 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1053a6e2 MC |
1011 | return 0; |
1012 | } | |
1013 | ||
61fb5923 | 1014 | s->ext.ticket_expected = 0; |
1053a6e2 MC |
1015 | for (id = 0; PACKET_remaining(&identities) != 0; id++) { |
1016 | PACKET identity; | |
2c604cb9 | 1017 | unsigned long ticket_agel; |
f3d40db1 | 1018 | size_t idlen; |
1053a6e2 MC |
1019 | |
1020 | if (!PACKET_get_length_prefixed_2(&identities, &identity) | |
2c604cb9 | 1021 | || !PACKET_get_net_4(&identities, &ticket_agel)) { |
c48ffbcc | 1022 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1053a6e2 MC |
1023 | return 0; |
1024 | } | |
1025 | ||
f3d40db1 | 1026 | idlen = PACKET_remaining(&identity); |
3a7c56b2 | 1027 | if (s->psk_find_session_cb != NULL |
38b051a1 | 1028 | && !s->psk_find_session_cb(ssl, PACKET_data(&identity), idlen, |
011d768a | 1029 | &sess)) { |
c48ffbcc | 1030 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_EXTENSION); |
011d768a MC |
1031 | return 0; |
1032 | } | |
1033 | ||
c2b290c3 | 1034 | #ifndef OPENSSL_NO_PSK |
1287dabd | 1035 | if (sess == NULL |
f3d40db1 MC |
1036 | && s->psk_server_callback != NULL |
1037 | && idlen <= PSK_MAX_IDENTITY_LEN) { | |
1038 | char *pskid = NULL; | |
1039 | unsigned char pskdata[PSK_MAX_PSK_LEN]; | |
1040 | unsigned int pskdatalen; | |
1041 | ||
1042 | if (!PACKET_strndup(&identity, &pskid)) { | |
c48ffbcc | 1043 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
1044 | return 0; |
1045 | } | |
38b051a1 | 1046 | pskdatalen = s->psk_server_callback(ssl, pskid, pskdata, |
f3d40db1 MC |
1047 | sizeof(pskdata)); |
1048 | OPENSSL_free(pskid); | |
1049 | if (pskdatalen > PSK_MAX_PSK_LEN) { | |
c48ffbcc | 1050 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
1051 | return 0; |
1052 | } else if (pskdatalen > 0) { | |
1053 | const SSL_CIPHER *cipher; | |
1054 | const unsigned char tls13_aes128gcmsha256_id[] = { 0x13, 0x01 }; | |
1055 | ||
1056 | /* | |
1057 | * We found a PSK using an old style callback. We don't know | |
1058 | * the digest so we default to SHA256 as per the TLSv1.3 spec | |
1059 | */ | |
38b051a1 | 1060 | cipher = SSL_CIPHER_find(ssl, tls13_aes128gcmsha256_id); |
f3d40db1 MC |
1061 | if (cipher == NULL) { |
1062 | OPENSSL_cleanse(pskdata, pskdatalen); | |
c48ffbcc | 1063 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
1064 | return 0; |
1065 | } | |
1066 | ||
1067 | sess = SSL_SESSION_new(); | |
1068 | if (sess == NULL | |
1069 | || !SSL_SESSION_set1_master_key(sess, pskdata, | |
1070 | pskdatalen) | |
1071 | || !SSL_SESSION_set_cipher(sess, cipher) | |
1072 | || !SSL_SESSION_set_protocol_version(sess, | |
1073 | TLS1_3_VERSION)) { | |
1074 | OPENSSL_cleanse(pskdata, pskdatalen); | |
c48ffbcc | 1075 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
1076 | goto err; |
1077 | } | |
1078 | OPENSSL_cleanse(pskdata, pskdatalen); | |
1079 | } | |
1080 | } | |
c2b290c3 | 1081 | #endif /* OPENSSL_NO_PSK */ |
f3d40db1 | 1082 | |
011d768a MC |
1083 | if (sess != NULL) { |
1084 | /* We found a PSK */ | |
3a7c56b2 | 1085 | SSL_SESSION *sesstmp = ssl_session_dup(sess, 0); |
1b8bacff | 1086 | |
3a7c56b2 | 1087 | if (sesstmp == NULL) { |
c48ffbcc | 1088 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
3a7c56b2 MC |
1089 | return 0; |
1090 | } | |
1091 | SSL_SESSION_free(sess); | |
1092 | sess = sesstmp; | |
1093 | ||
1094 | /* | |
1095 | * We've just been told to use this session for this context so | |
1096 | * make sure the sid_ctx matches up. | |
1097 | */ | |
1098 | memcpy(sess->sid_ctx, s->sid_ctx, s->sid_ctx_length); | |
1099 | sess->sid_ctx_length = s->sid_ctx_length; | |
1100 | ext = 1; | |
630369d9 MC |
1101 | if (id == 0) |
1102 | s->ext.early_data_ok = 1; | |
51256b34 | 1103 | s->ext.ticket_expected = 1; |
3a7c56b2 MC |
1104 | } else { |
1105 | uint32_t ticket_age = 0, now, agesec, agems; | |
61fb5923 MC |
1106 | int ret; |
1107 | ||
e880d4e5 MC |
1108 | /* |
1109 | * If we are using anti-replay protection then we behave as if | |
1110 | * SSL_OP_NO_TICKET is set - we are caching tickets anyway so there | |
1111 | * is no point in using full stateless tickets. | |
1112 | */ | |
1113 | if ((s->options & SSL_OP_NO_TICKET) != 0 | |
5d263fb7 MC |
1114 | || (s->max_early_data > 0 |
1115 | && (s->options & SSL_OP_NO_ANTI_REPLAY) == 0)) | |
6cc0b3c2 MC |
1116 | ret = tls_get_stateful_ticket(s, &identity, &sess); |
1117 | else | |
1118 | ret = tls_decrypt_ticket(s, PACKET_data(&identity), | |
1119 | PACKET_remaining(&identity), NULL, 0, | |
1120 | &sess); | |
61fb5923 MC |
1121 | |
1122 | if (ret == SSL_TICKET_EMPTY) { | |
c48ffbcc | 1123 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
61fb5923 MC |
1124 | return 0; |
1125 | } | |
3a7c56b2 | 1126 | |
df0fed9a TS |
1127 | if (ret == SSL_TICKET_FATAL_ERR_MALLOC |
1128 | || ret == SSL_TICKET_FATAL_ERR_OTHER) { | |
c48ffbcc | 1129 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
3a7c56b2 MC |
1130 | return 0; |
1131 | } | |
61fb5923 | 1132 | if (ret == SSL_TICKET_NONE || ret == SSL_TICKET_NO_DECRYPT) |
3a7c56b2 MC |
1133 | continue; |
1134 | ||
66d7de16 MC |
1135 | /* Check for replay */ |
1136 | if (s->max_early_data > 0 | |
5d263fb7 | 1137 | && (s->options & SSL_OP_NO_ANTI_REPLAY) == 0 |
66d7de16 MC |
1138 | && !SSL_CTX_remove_session(s->session_ctx, sess)) { |
1139 | SSL_SESSION_free(sess); | |
1140 | sess = NULL; | |
1141 | continue; | |
1142 | } | |
1143 | ||
3a7c56b2 MC |
1144 | ticket_age = (uint32_t)ticket_agel; |
1145 | now = (uint32_t)time(NULL); | |
1146 | agesec = now - (uint32_t)sess->time; | |
1147 | agems = agesec * (uint32_t)1000; | |
1148 | ticket_age -= sess->ext.tick_age_add; | |
1149 | ||
1150 | /* | |
1151 | * For simplicity we do our age calculations in seconds. If the | |
1152 | * client does it in ms then it could appear that their ticket age | |
1153 | * is longer than ours (our ticket age calculation should always be | |
1154 | * slightly longer than the client's due to the network latency). | |
1155 | * Therefore we add 1000ms to our age calculation to adjust for | |
1156 | * rounding errors. | |
1157 | */ | |
630369d9 MC |
1158 | if (id == 0 |
1159 | && sess->timeout >= (long)agesec | |
3a7c56b2 MC |
1160 | && agems / (uint32_t)1000 == agesec |
1161 | && ticket_age <= agems + 1000 | |
1162 | && ticket_age + TICKET_AGE_ALLOWANCE >= agems + 1000) { | |
1163 | /* | |
1164 | * Ticket age is within tolerance and not expired. We allow it | |
1165 | * for early data | |
1166 | */ | |
1167 | s->ext.early_data_ok = 1; | |
1168 | } | |
1053a6e2 | 1169 | } |
1053a6e2 | 1170 | |
38b051a1 | 1171 | md = ssl_md(sctx, sess->cipher->algorithm2); |
b740012f | 1172 | if (md == NULL) { |
1173 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
1174 | goto err; | |
1175 | } | |
c8f6c28a | 1176 | if (!EVP_MD_is_a(md, |
38b051a1 | 1177 | EVP_MD_get0_name(ssl_md(sctx, |
ed576acd | 1178 | s->s3.tmp.new_cipher->algorithm2)))) { |
0de6d66d | 1179 | /* The ciphersuite is not compatible with this session. */ |
1053a6e2 MC |
1180 | SSL_SESSION_free(sess); |
1181 | sess = NULL; | |
630369d9 | 1182 | s->ext.early_data_ok = 0; |
51256b34 | 1183 | s->ext.ticket_expected = 0; |
1053a6e2 MC |
1184 | continue; |
1185 | } | |
1053a6e2 MC |
1186 | break; |
1187 | } | |
1188 | ||
1189 | if (sess == NULL) | |
1190 | return 1; | |
1191 | ||
1192 | binderoffset = PACKET_data(pkt) - (const unsigned char *)s->init_buf->data; | |
ed576acd | 1193 | hashsize = EVP_MD_get_size(md); |
1053a6e2 MC |
1194 | |
1195 | if (!PACKET_get_length_prefixed_2(pkt, &binders)) { | |
c48ffbcc | 1196 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1053a6e2 MC |
1197 | goto err; |
1198 | } | |
1199 | ||
1200 | for (i = 0; i <= id; i++) { | |
1201 | if (!PACKET_get_length_prefixed_1(&binders, &binder)) { | |
c48ffbcc | 1202 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1053a6e2 MC |
1203 | goto err; |
1204 | } | |
1205 | } | |
1206 | ||
2894e9cb | 1207 | if (PACKET_remaining(&binder) != hashsize) { |
c48ffbcc | 1208 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
2894e9cb MC |
1209 | goto err; |
1210 | } | |
1211 | if (tls_psk_do_binder(s, md, (const unsigned char *)s->init_buf->data, | |
1212 | binderoffset, PACKET_data(&binder), NULL, sess, 0, | |
1213 | ext) != 1) { | |
635c8f77 | 1214 | /* SSLfatal() already called */ |
1053a6e2 MC |
1215 | goto err; |
1216 | } | |
1217 | ||
c96ce52c | 1218 | s->ext.tick_identity = id; |
2c604cb9 | 1219 | |
1053a6e2 MC |
1220 | SSL_SESSION_free(s->session); |
1221 | s->session = sess; | |
1053a6e2 MC |
1222 | return 1; |
1223 | err: | |
312e9387 | 1224 | SSL_SESSION_free(sess); |
1053a6e2 MC |
1225 | return 0; |
1226 | } | |
1227 | ||
38b051a1 | 1228 | int tls_parse_ctos_post_handshake_auth(SSL_CONNECTION *s, PACKET *pkt, |
a7e6a3d8 P |
1229 | ossl_unused unsigned int context, |
1230 | ossl_unused X509 *x, | |
1231 | ossl_unused size_t chainidx) | |
9d75dce3 TS |
1232 | { |
1233 | if (PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 1234 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
9d75dce3 TS |
1235 | SSL_R_POST_HANDSHAKE_AUTH_ENCODING_ERR); |
1236 | return 0; | |
1237 | } | |
1238 | ||
1239 | s->post_handshake_auth = SSL_PHA_EXT_RECEIVED; | |
1240 | ||
1241 | return 1; | |
1242 | } | |
1243 | ||
1266eefd MC |
1244 | /* |
1245 | * Add the server's renegotiation binding | |
1246 | */ | |
38b051a1 | 1247 | EXT_RETURN tls_construct_stoc_renegotiate(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1248 | unsigned int context, X509 *x, |
f63a17d6 | 1249 | size_t chainidx) |
7da160b0 | 1250 | { |
555cbb32 | 1251 | if (!s->s3.send_connection_binding) |
b186a592 | 1252 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 1253 | |
db0f35dd | 1254 | /* Still add this even if SSL_OP_NO_RENEGOTIATION is set */ |
7da160b0 MC |
1255 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_renegotiate) |
1256 | || !WPACKET_start_sub_packet_u16(pkt) | |
1257 | || !WPACKET_start_sub_packet_u8(pkt) | |
555cbb32 TS |
1258 | || !WPACKET_memcpy(pkt, s->s3.previous_client_finished, |
1259 | s->s3.previous_client_finished_len) | |
1260 | || !WPACKET_memcpy(pkt, s->s3.previous_server_finished, | |
1261 | s->s3.previous_server_finished_len) | |
7da160b0 MC |
1262 | || !WPACKET_close(pkt) |
1263 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1264 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1265 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1266 | } |
1267 | ||
b186a592 | 1268 | return EXT_RETURN_SENT; |
7da160b0 MC |
1269 | } |
1270 | ||
38b051a1 | 1271 | EXT_RETURN tls_construct_stoc_server_name(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1272 | unsigned int context, X509 *x, |
f63a17d6 | 1273 | size_t chainidx) |
7da160b0 | 1274 | { |
7955c1f1 MC |
1275 | if (s->servername_done != 1) |
1276 | return EXT_RETURN_NOT_SENT; | |
1277 | ||
1278 | /* | |
1279 | * Prior to TLSv1.3 we ignore any SNI in the current handshake if resuming. | |
1280 | * We just use the servername from the initial handshake. | |
1281 | */ | |
38b051a1 | 1282 | if (s->hit && !SSL_CONNECTION_IS_TLS13(s)) |
b186a592 | 1283 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1284 | |
1285 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_server_name) | |
1286 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
c48ffbcc | 1287 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1288 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1289 | } |
1290 | ||
b186a592 | 1291 | return EXT_RETURN_SENT; |
7da160b0 MC |
1292 | } |
1293 | ||
cf72c757 | 1294 | /* Add/include the server's max fragment len extension into ServerHello */ |
38b051a1 | 1295 | EXT_RETURN tls_construct_stoc_maxfragmentlen(SSL_CONNECTION *s, WPACKET *pkt, |
cf72c757 | 1296 | unsigned int context, X509 *x, |
f63a17d6 | 1297 | size_t chainidx) |
cf72c757 F |
1298 | { |
1299 | if (!USE_MAX_FRAGMENT_LENGTH_EXT(s->session)) | |
1300 | return EXT_RETURN_NOT_SENT; | |
1301 | ||
1302 | /*- | |
1303 | * 4 bytes for this extension type and extension length | |
1304 | * 1 byte for the Max Fragment Length code value. | |
1305 | */ | |
1306 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_max_fragment_length) | |
1307 | || !WPACKET_start_sub_packet_u16(pkt) | |
1308 | || !WPACKET_put_bytes_u8(pkt, s->session->ext.max_fragment_len_mode) | |
1309 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1310 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
cf72c757 F |
1311 | return EXT_RETURN_FAIL; |
1312 | } | |
1313 | ||
1314 | return EXT_RETURN_SENT; | |
1315 | } | |
1316 | ||
38b051a1 | 1317 | EXT_RETURN tls_construct_stoc_ec_pt_formats(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1318 | unsigned int context, X509 *x, |
f63a17d6 | 1319 | size_t chainidx) |
7da160b0 | 1320 | { |
555cbb32 TS |
1321 | unsigned long alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
1322 | unsigned long alg_a = s->s3.tmp.new_cipher->algorithm_auth; | |
89247375 | 1323 | int using_ecc = ((alg_k & SSL_kECDHE) || (alg_a & SSL_aECDSA)) |
cd0fb43c | 1324 | && (s->ext.peer_ecpointformats != NULL); |
7da160b0 MC |
1325 | const unsigned char *plist; |
1326 | size_t plistlen; | |
1327 | ||
1328 | if (!using_ecc) | |
b186a592 | 1329 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1330 | |
1331 | tls1_get_formatlist(s, &plist, &plistlen); | |
7da160b0 MC |
1332 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_ec_point_formats) |
1333 | || !WPACKET_start_sub_packet_u16(pkt) | |
1334 | || !WPACKET_sub_memcpy_u8(pkt, plist, plistlen) | |
1335 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1336 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1337 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1338 | } |
1339 | ||
b186a592 | 1340 | return EXT_RETURN_SENT; |
7da160b0 | 1341 | } |
7da160b0 | 1342 | |
38b051a1 | 1343 | EXT_RETURN tls_construct_stoc_supported_groups(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1344 | unsigned int context, X509 *x, |
f63a17d6 | 1345 | size_t chainidx) |
6af87546 | 1346 | { |
9e84a42d | 1347 | const uint16_t *groups; |
6af87546 | 1348 | size_t numgroups, i, first = 1; |
9d2d857f | 1349 | int version; |
6af87546 | 1350 | |
555cbb32 TS |
1351 | /* s->s3.group_id is non zero if we accepted a key_share */ |
1352 | if (s->s3.group_id == 0) | |
b186a592 | 1353 | return EXT_RETURN_NOT_SENT; |
6af87546 MC |
1354 | |
1355 | /* Get our list of supported groups */ | |
ff6d20a6 | 1356 | tls1_get_supported_groups(s, &groups, &numgroups); |
34e5292c | 1357 | if (numgroups == 0) { |
c48ffbcc | 1358 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1359 | return EXT_RETURN_FAIL; |
6af87546 MC |
1360 | } |
1361 | ||
1362 | /* Copy group ID if supported */ | |
38b051a1 | 1363 | version = SSL_version(SSL_CONNECTION_GET_SSL(s)); |
9e84a42d DSH |
1364 | for (i = 0; i < numgroups; i++) { |
1365 | uint16_t group = groups[i]; | |
1366 | ||
8b1db5d3 | 1367 | if (tls_valid_group(s, group, version, version, 0, NULL) |
dbc6268f | 1368 | && tls_group_allowed(s, group, SSL_SECOP_CURVE_SUPPORTED)) { |
6af87546 MC |
1369 | if (first) { |
1370 | /* | |
1371 | * Check if the client is already using our preferred group. If | |
1372 | * so we don't need to add this extension | |
1373 | */ | |
555cbb32 | 1374 | if (s->s3.group_id == group) |
b186a592 | 1375 | return EXT_RETURN_NOT_SENT; |
6af87546 MC |
1376 | |
1377 | /* Add extension header */ | |
1378 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_groups) | |
1379 | /* Sub-packet for supported_groups extension */ | |
1380 | || !WPACKET_start_sub_packet_u16(pkt) | |
1381 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
c48ffbcc | 1382 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1383 | return EXT_RETURN_FAIL; |
6af87546 MC |
1384 | } |
1385 | ||
1386 | first = 0; | |
1387 | } | |
9e84a42d | 1388 | if (!WPACKET_put_bytes_u16(pkt, group)) { |
c48ffbcc | 1389 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1390 | return EXT_RETURN_FAIL; |
6af87546 MC |
1391 | } |
1392 | } | |
1393 | } | |
1394 | ||
1395 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
c48ffbcc | 1396 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1397 | return EXT_RETURN_FAIL; |
6af87546 MC |
1398 | } |
1399 | ||
b186a592 | 1400 | return EXT_RETURN_SENT; |
6af87546 MC |
1401 | } |
1402 | ||
38b051a1 | 1403 | EXT_RETURN tls_construct_stoc_session_ticket(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1404 | unsigned int context, X509 *x, |
f63a17d6 | 1405 | size_t chainidx) |
7da160b0 | 1406 | { |
aff8c126 RS |
1407 | if (!s->ext.ticket_expected || !tls_use_ticket(s)) { |
1408 | s->ext.ticket_expected = 0; | |
b186a592 | 1409 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1410 | } |
1411 | ||
1412 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket) | |
1413 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
c48ffbcc | 1414 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1415 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1416 | } |
1417 | ||
b186a592 | 1418 | return EXT_RETURN_SENT; |
7da160b0 MC |
1419 | } |
1420 | ||
ab83e314 | 1421 | #ifndef OPENSSL_NO_OCSP |
38b051a1 | 1422 | EXT_RETURN tls_construct_stoc_status_request(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1423 | unsigned int context, X509 *x, |
f63a17d6 | 1424 | size_t chainidx) |
7da160b0 | 1425 | { |
debb64a0 MC |
1426 | /* We don't currently support this extension inside a CertificateRequest */ |
1427 | if (context == SSL_EXT_TLS1_3_CERTIFICATE_REQUEST) | |
1428 | return EXT_RETURN_NOT_SENT; | |
1429 | ||
aff8c126 | 1430 | if (!s->ext.status_expected) |
b186a592 | 1431 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 1432 | |
38b051a1 | 1433 | if (SSL_CONNECTION_IS_TLS13(s) && chainidx != 0) |
b186a592 | 1434 | return EXT_RETURN_NOT_SENT; |
e96e0f8e | 1435 | |
7da160b0 | 1436 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request) |
f63e4288 | 1437 | || !WPACKET_start_sub_packet_u16(pkt)) { |
c48ffbcc | 1438 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1439 | return EXT_RETURN_FAIL; |
f63e4288 MC |
1440 | } |
1441 | ||
1442 | /* | |
1443 | * In TLSv1.3 we include the certificate status itself. In <= TLSv1.2 we | |
1444 | * send back an empty extension, with the certificate status appearing as a | |
1445 | * separate message | |
1446 | */ | |
38b051a1 | 1447 | if (SSL_CONNECTION_IS_TLS13(s) && !tls_construct_cert_status_body(s, pkt)) { |
3ec8d113 | 1448 | /* SSLfatal() already called */ |
56d36288 | 1449 | return EXT_RETURN_FAIL; |
3ec8d113 MC |
1450 | } |
1451 | if (!WPACKET_close(pkt)) { | |
c48ffbcc | 1452 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1453 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1454 | } |
1455 | ||
b186a592 | 1456 | return EXT_RETURN_SENT; |
7da160b0 | 1457 | } |
ab83e314 | 1458 | #endif |
7da160b0 | 1459 | |
7da160b0 | 1460 | #ifndef OPENSSL_NO_NEXTPROTONEG |
38b051a1 | 1461 | EXT_RETURN tls_construct_stoc_next_proto_neg(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1462 | unsigned int context, X509 *x, |
f63a17d6 | 1463 | size_t chainidx) |
7da160b0 MC |
1464 | { |
1465 | const unsigned char *npa; | |
1466 | unsigned int npalen; | |
1467 | int ret; | |
555cbb32 | 1468 | int npn_seen = s->s3.npn_seen; |
38b051a1 | 1469 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
7da160b0 | 1470 | |
555cbb32 | 1471 | s->s3.npn_seen = 0; |
38b051a1 | 1472 | if (!npn_seen || sctx->ext.npn_advertised_cb == NULL) |
b186a592 | 1473 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 1474 | |
38b051a1 TM |
1475 | ret = sctx->ext.npn_advertised_cb(SSL_CONNECTION_GET_SSL(s), &npa, &npalen, |
1476 | sctx->ext.npn_advertised_cb_arg); | |
7da160b0 MC |
1477 | if (ret == SSL_TLSEXT_ERR_OK) { |
1478 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_next_proto_neg) | |
1479 | || !WPACKET_sub_memcpy_u16(pkt, npa, npalen)) { | |
c48ffbcc | 1480 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1481 | return EXT_RETURN_FAIL; |
7da160b0 | 1482 | } |
555cbb32 | 1483 | s->s3.npn_seen = 1; |
7da160b0 MC |
1484 | } |
1485 | ||
b186a592 | 1486 | return EXT_RETURN_SENT; |
7da160b0 MC |
1487 | } |
1488 | #endif | |
1489 | ||
38b051a1 | 1490 | EXT_RETURN tls_construct_stoc_alpn(SSL_CONNECTION *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 1491 | X509 *x, size_t chainidx) |
7da160b0 | 1492 | { |
555cbb32 | 1493 | if (s->s3.alpn_selected == NULL) |
b186a592 | 1494 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1495 | |
1496 | if (!WPACKET_put_bytes_u16(pkt, | |
1497 | TLSEXT_TYPE_application_layer_protocol_negotiation) | |
1498 | || !WPACKET_start_sub_packet_u16(pkt) | |
1499 | || !WPACKET_start_sub_packet_u16(pkt) | |
555cbb32 TS |
1500 | || !WPACKET_sub_memcpy_u8(pkt, s->s3.alpn_selected, |
1501 | s->s3.alpn_selected_len) | |
7da160b0 MC |
1502 | || !WPACKET_close(pkt) |
1503 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1504 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1505 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1506 | } |
1507 | ||
b186a592 | 1508 | return EXT_RETURN_SENT; |
7da160b0 MC |
1509 | } |
1510 | ||
1511 | #ifndef OPENSSL_NO_SRTP | |
38b051a1 | 1512 | EXT_RETURN tls_construct_stoc_use_srtp(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1513 | unsigned int context, X509 *x, |
f63a17d6 | 1514 | size_t chainidx) |
7da160b0 MC |
1515 | { |
1516 | if (s->srtp_profile == NULL) | |
b186a592 | 1517 | return EXT_RETURN_NOT_SENT; |
a1448c26 | 1518 | |
7da160b0 MC |
1519 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp) |
1520 | || !WPACKET_start_sub_packet_u16(pkt) | |
1521 | || !WPACKET_put_bytes_u16(pkt, 2) | |
1522 | || !WPACKET_put_bytes_u16(pkt, s->srtp_profile->id) | |
1523 | || !WPACKET_put_bytes_u8(pkt, 0) | |
1524 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1525 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1526 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1527 | } |
1528 | ||
b186a592 | 1529 | return EXT_RETURN_SENT; |
7da160b0 MC |
1530 | } |
1531 | #endif | |
1532 | ||
38b051a1 TM |
1533 | EXT_RETURN tls_construct_stoc_etm(SSL_CONNECTION *s, WPACKET *pkt, |
1534 | unsigned int context, | |
f63a17d6 | 1535 | X509 *x, size_t chainidx) |
7da160b0 | 1536 | { |
28a31a0a | 1537 | if (!s->ext.use_etm) |
b186a592 | 1538 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1539 | |
1540 | /* | |
1541 | * Don't use encrypt_then_mac if AEAD or RC4 might want to disable | |
1542 | * for other cases too. | |
1543 | */ | |
555cbb32 TS |
1544 | if (s->s3.tmp.new_cipher->algorithm_mac == SSL_AEAD |
1545 | || s->s3.tmp.new_cipher->algorithm_enc == SSL_RC4 | |
1546 | || s->s3.tmp.new_cipher->algorithm_enc == SSL_eGOST2814789CNT | |
5a5530a2 DB |
1547 | || s->s3.tmp.new_cipher->algorithm_enc == SSL_eGOST2814789CNT12 |
1548 | || s->s3.tmp.new_cipher->algorithm_enc == SSL_MAGMA | |
1549 | || s->s3.tmp.new_cipher->algorithm_enc == SSL_KUZNYECHIK) { | |
28a31a0a | 1550 | s->ext.use_etm = 0; |
b186a592 | 1551 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1552 | } |
1553 | ||
1554 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac) | |
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 | ||
38b051a1 TM |
1563 | EXT_RETURN tls_construct_stoc_ems(SSL_CONNECTION *s, WPACKET *pkt, |
1564 | unsigned int context, | |
f63a17d6 | 1565 | X509 *x, size_t chainidx) |
7da160b0 | 1566 | { |
555cbb32 | 1567 | if ((s->s3.flags & TLS1_FLAGS_RECEIVED_EXTMS) == 0) |
b186a592 | 1568 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1569 | |
1570 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret) | |
1571 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
c48ffbcc | 1572 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1573 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1574 | } |
1575 | ||
b186a592 | 1576 | return EXT_RETURN_SENT; |
7da160b0 MC |
1577 | } |
1578 | ||
38b051a1 | 1579 | EXT_RETURN tls_construct_stoc_supported_versions(SSL_CONNECTION *s, WPACKET *pkt, |
88050dd1 MC |
1580 | unsigned int context, X509 *x, |
1581 | size_t chainidx) | |
1582 | { | |
38b051a1 | 1583 | if (!ossl_assert(SSL_CONNECTION_IS_TLS13(s))) { |
c48ffbcc | 1584 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
27e462f1 MC |
1585 | return EXT_RETURN_FAIL; |
1586 | } | |
88050dd1 MC |
1587 | |
1588 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_versions) | |
1589 | || !WPACKET_start_sub_packet_u16(pkt) | |
35e742ec | 1590 | || !WPACKET_put_bytes_u16(pkt, s->version) |
88050dd1 | 1591 | || !WPACKET_close(pkt)) { |
c48ffbcc | 1592 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
88050dd1 MC |
1593 | return EXT_RETURN_FAIL; |
1594 | } | |
1595 | ||
1596 | return EXT_RETURN_SENT; | |
1597 | } | |
1598 | ||
38b051a1 | 1599 | EXT_RETURN tls_construct_stoc_key_share(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1600 | unsigned int context, X509 *x, |
f63a17d6 | 1601 | size_t chainidx) |
7da160b0 | 1602 | { |
3cf96e88 | 1603 | #ifndef OPENSSL_NO_TLS1_3 |
7da160b0 MC |
1604 | unsigned char *encodedPoint; |
1605 | size_t encoded_pt_len = 0; | |
555cbb32 | 1606 | EVP_PKEY *ckey = s->s3.peer_tmp, *skey = NULL; |
8b17fbaf | 1607 | const TLS_GROUP_INFO *ginf = NULL; |
7da160b0 | 1608 | |
dd77962e MC |
1609 | if (s->hello_retry_request == SSL_HRR_PENDING) { |
1610 | if (ckey != NULL) { | |
1611 | /* Original key_share was acceptable so don't ask for another one */ | |
1612 | return EXT_RETURN_NOT_SENT; | |
1613 | } | |
1614 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
1615 | || !WPACKET_start_sub_packet_u16(pkt) | |
0a10825a BE |
1616 | || !WPACKET_put_bytes_u16(pkt, ssl_group_id_internal_to_tls13( |
1617 | s->s3.group_id)) | |
dd77962e | 1618 | || !WPACKET_close(pkt)) { |
c48ffbcc | 1619 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
dd77962e | 1620 | return EXT_RETURN_FAIL; |
7d061fce MC |
1621 | } |
1622 | ||
dd77962e MC |
1623 | return EXT_RETURN_SENT; |
1624 | } | |
1625 | ||
1626 | if (ckey == NULL) { | |
1627 | /* No key_share received from client - must be resuming */ | |
0247086d | 1628 | if (!s->hit || !tls13_generate_handshake_secret(s, NULL, 0)) { |
c48ffbcc | 1629 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1630 | return EXT_RETURN_FAIL; |
0247086d | 1631 | } |
b186a592 | 1632 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 1633 | } |
e776858b BK |
1634 | if (s->hit && (s->ext.psk_kex_mode & TLSEXT_KEX_MODE_FLAG_KE_DHE) == 0) { |
1635 | /* | |
1636 | * PSK ('hit') and explicitly not doing DHE (if the client sent the | |
1637 | * DHE option we always take it); don't send key share. | |
1638 | */ | |
1639 | return EXT_RETURN_NOT_SENT; | |
1640 | } | |
7da160b0 MC |
1641 | |
1642 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
1643 | || !WPACKET_start_sub_packet_u16(pkt) | |
555cbb32 | 1644 | || !WPACKET_put_bytes_u16(pkt, s->s3.group_id)) { |
c48ffbcc | 1645 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1646 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1647 | } |
1648 | ||
38b051a1 TM |
1649 | if ((ginf = tls1_group_id_lookup(SSL_CONNECTION_GET_CTX(s), |
1650 | s->s3.group_id)) == NULL) { | |
c48ffbcc | 1651 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1652 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1653 | } |
1654 | ||
8b17fbaf NT |
1655 | if (!ginf->is_kem) { |
1656 | /* Regular KEX */ | |
1657 | skey = ssl_generate_pkey(s, ckey); | |
1658 | if (skey == NULL) { | |
c48ffbcc | 1659 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); |
8b17fbaf NT |
1660 | return EXT_RETURN_FAIL; |
1661 | } | |
7da160b0 | 1662 | |
8b17fbaf | 1663 | /* Generate encoding of server key */ |
5ac8fb58 | 1664 | encoded_pt_len = EVP_PKEY_get1_encoded_public_key(skey, &encodedPoint); |
8b17fbaf | 1665 | if (encoded_pt_len == 0) { |
c48ffbcc | 1666 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EC_LIB); |
8b17fbaf NT |
1667 | EVP_PKEY_free(skey); |
1668 | return EXT_RETURN_FAIL; | |
1669 | } | |
1670 | ||
1671 | if (!WPACKET_sub_memcpy_u16(pkt, encodedPoint, encoded_pt_len) | |
1672 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1673 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
8b17fbaf NT |
1674 | EVP_PKEY_free(skey); |
1675 | OPENSSL_free(encodedPoint); | |
1676 | return EXT_RETURN_FAIL; | |
1677 | } | |
7da160b0 | 1678 | OPENSSL_free(encodedPoint); |
7da160b0 | 1679 | |
8b17fbaf NT |
1680 | /* |
1681 | * This causes the crypto state to be updated based on the derived keys | |
1682 | */ | |
1683 | s->s3.tmp.pkey = skey; | |
1684 | if (ssl_derive(s, skey, ckey, 1) == 0) { | |
1685 | /* SSLfatal() already called */ | |
1686 | return EXT_RETURN_FAIL; | |
1687 | } | |
1688 | } else { | |
1689 | /* KEM mode */ | |
1690 | unsigned char *ct = NULL; | |
1691 | size_t ctlen = 0; | |
1692 | ||
1693 | /* | |
1694 | * This does not update the crypto state. | |
1695 | * | |
1696 | * The generated pms is stored in `s->s3.tmp.pms` to be later used via | |
1697 | * ssl_gensecret(). | |
1698 | */ | |
1699 | if (ssl_encapsulate(s, ckey, &ct, &ctlen, 0) == 0) { | |
1700 | /* SSLfatal() already called */ | |
1701 | return EXT_RETURN_FAIL; | |
1702 | } | |
1703 | ||
1704 | if (ctlen == 0) { | |
c48ffbcc | 1705 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
8b17fbaf NT |
1706 | OPENSSL_free(ct); |
1707 | return EXT_RETURN_FAIL; | |
1708 | } | |
1709 | ||
1710 | if (!WPACKET_sub_memcpy_u16(pkt, ct, ctlen) | |
1711 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1712 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
8b17fbaf NT |
1713 | OPENSSL_free(ct); |
1714 | return EXT_RETURN_FAIL; | |
1715 | } | |
1716 | OPENSSL_free(ct); | |
1717 | ||
1718 | /* | |
1719 | * This causes the crypto state to be updated based on the generated pms | |
1720 | */ | |
1721 | if (ssl_gensecret(s, s->s3.tmp.pms, s->s3.tmp.pmslen) == 0) { | |
1722 | /* SSLfatal() already called */ | |
1723 | return EXT_RETURN_FAIL; | |
1724 | } | |
7da160b0 | 1725 | } |
aa6bd216 | 1726 | s->s3.did_kex = 1; |
b186a592 | 1727 | return EXT_RETURN_SENT; |
1aac20f5 MC |
1728 | #else |
1729 | return EXT_RETURN_FAIL; | |
1730 | #endif | |
7da160b0 MC |
1731 | } |
1732 | ||
38b051a1 TM |
1733 | EXT_RETURN tls_construct_stoc_cookie(SSL_CONNECTION *s, WPACKET *pkt, |
1734 | unsigned int context, | |
43054d3d MC |
1735 | X509 *x, size_t chainidx) |
1736 | { | |
1aac20f5 | 1737 | #ifndef OPENSSL_NO_TLS1_3 |
43054d3d MC |
1738 | unsigned char *hashval1, *hashval2, *appcookie1, *appcookie2, *cookie; |
1739 | unsigned char *hmac, *hmac2; | |
3fa2812f | 1740 | size_t startlen, ciphlen, totcookielen, hashlen, hmaclen, appcookielen; |
43054d3d MC |
1741 | EVP_MD_CTX *hctx; |
1742 | EVP_PKEY *pkey; | |
1743 | int ret = EXT_RETURN_FAIL; | |
38b051a1 TM |
1744 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
1745 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); | |
43054d3d | 1746 | |
555cbb32 | 1747 | if ((s->s3.flags & TLS1_FLAGS_STATELESS) == 0) |
43054d3d MC |
1748 | return EXT_RETURN_NOT_SENT; |
1749 | ||
38b051a1 | 1750 | if (sctx->gen_stateless_cookie_cb == NULL) { |
c48ffbcc | 1751 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_NO_COOKIE_CALLBACK_SET); |
e440f513 MC |
1752 | return EXT_RETURN_FAIL; |
1753 | } | |
1754 | ||
43054d3d MC |
1755 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_cookie) |
1756 | || !WPACKET_start_sub_packet_u16(pkt) | |
1757 | || !WPACKET_start_sub_packet_u16(pkt) | |
1758 | || !WPACKET_get_total_written(pkt, &startlen) | |
1759 | || !WPACKET_reserve_bytes(pkt, MAX_COOKIE_SIZE, &cookie) | |
1760 | || !WPACKET_put_bytes_u16(pkt, COOKIE_STATE_FORMAT_VERSION) | |
1761 | || !WPACKET_put_bytes_u16(pkt, TLS1_3_VERSION) | |
555cbb32 | 1762 | || !WPACKET_put_bytes_u16(pkt, s->s3.group_id) |
38b051a1 TM |
1763 | || !ssl->method->put_cipher_by_char(s->s3.tmp.new_cipher, pkt, |
1764 | &ciphlen) | |
43054d3d | 1765 | /* Is there a key_share extension present in this HRR? */ |
555cbb32 | 1766 | || !WPACKET_put_bytes_u8(pkt, s->s3.peer_tmp == NULL) |
d0debc0a | 1767 | || !WPACKET_put_bytes_u32(pkt, (unsigned int)time(NULL)) |
43054d3d MC |
1768 | || !WPACKET_start_sub_packet_u16(pkt) |
1769 | || !WPACKET_reserve_bytes(pkt, EVP_MAX_MD_SIZE, &hashval1)) { | |
c48ffbcc | 1770 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1771 | return EXT_RETURN_FAIL; |
1772 | } | |
1773 | ||
1774 | /* | |
1775 | * Get the hash of the initial ClientHello. ssl_handshake_hash() operates | |
1776 | * on raw buffers, so we first reserve sufficient bytes (above) and then | |
1777 | * subsequently allocate them (below) | |
1778 | */ | |
1779 | if (!ssl3_digest_cached_records(s, 0) | |
1780 | || !ssl_handshake_hash(s, hashval1, EVP_MAX_MD_SIZE, &hashlen)) { | |
1781 | /* SSLfatal() already called */ | |
1782 | return EXT_RETURN_FAIL; | |
1783 | } | |
1784 | ||
1785 | if (!WPACKET_allocate_bytes(pkt, hashlen, &hashval2) | |
1786 | || !ossl_assert(hashval1 == hashval2) | |
1787 | || !WPACKET_close(pkt) | |
1788 | || !WPACKET_start_sub_packet_u8(pkt) | |
1789 | || !WPACKET_reserve_bytes(pkt, SSL_COOKIE_LENGTH, &appcookie1)) { | |
c48ffbcc | 1790 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1791 | return EXT_RETURN_FAIL; |
1792 | } | |
1793 | ||
1794 | /* Generate the application cookie */ | |
38b051a1 TM |
1795 | if (sctx->gen_stateless_cookie_cb(ssl, appcookie1, |
1796 | &appcookielen) == 0) { | |
c48ffbcc | 1797 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_COOKIE_GEN_CALLBACK_FAILURE); |
43054d3d MC |
1798 | return EXT_RETURN_FAIL; |
1799 | } | |
1800 | ||
1801 | if (!WPACKET_allocate_bytes(pkt, appcookielen, &appcookie2) | |
1802 | || !ossl_assert(appcookie1 == appcookie2) | |
1803 | || !WPACKET_close(pkt) | |
1804 | || !WPACKET_get_total_written(pkt, &totcookielen) | |
1805 | || !WPACKET_reserve_bytes(pkt, SHA256_DIGEST_LENGTH, &hmac)) { | |
c48ffbcc | 1806 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1807 | return EXT_RETURN_FAIL; |
1808 | } | |
1809 | hmaclen = SHA256_DIGEST_LENGTH; | |
1810 | ||
1811 | totcookielen -= startlen; | |
1812 | if (!ossl_assert(totcookielen <= MAX_COOKIE_SIZE - SHA256_DIGEST_LENGTH)) { | |
c48ffbcc | 1813 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1814 | return EXT_RETURN_FAIL; |
1815 | } | |
1816 | ||
1817 | /* HMAC the cookie */ | |
1818 | hctx = EVP_MD_CTX_create(); | |
38b051a1 TM |
1819 | pkey = EVP_PKEY_new_raw_private_key_ex(sctx->libctx, "HMAC", |
1820 | sctx->propq, | |
d8652be0 MC |
1821 | s->session_ctx->ext.cookie_hmac_key, |
1822 | sizeof(s->session_ctx->ext.cookie_hmac_key)); | |
43054d3d | 1823 | if (hctx == NULL || pkey == NULL) { |
c48ffbcc | 1824 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); |
43054d3d MC |
1825 | goto err; |
1826 | } | |
1827 | ||
38b051a1 TM |
1828 | if (EVP_DigestSignInit_ex(hctx, NULL, "SHA2-256", sctx->libctx, |
1829 | sctx->propq, pkey, NULL) <= 0 | |
43054d3d MC |
1830 | || EVP_DigestSign(hctx, hmac, &hmaclen, cookie, |
1831 | totcookielen) <= 0) { | |
c48ffbcc | 1832 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1833 | goto err; |
1834 | } | |
1835 | ||
1836 | if (!ossl_assert(totcookielen + hmaclen <= MAX_COOKIE_SIZE)) { | |
c48ffbcc | 1837 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1838 | goto err; |
1839 | } | |
1840 | ||
1841 | if (!WPACKET_allocate_bytes(pkt, hmaclen, &hmac2) | |
1842 | || !ossl_assert(hmac == hmac2) | |
1843 | || !ossl_assert(cookie == hmac - totcookielen) | |
1844 | || !WPACKET_close(pkt) | |
1845 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1846 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1847 | goto err; |
1848 | } | |
1849 | ||
1850 | ret = EXT_RETURN_SENT; | |
1851 | ||
1852 | err: | |
1853 | EVP_MD_CTX_free(hctx); | |
1854 | EVP_PKEY_free(pkey); | |
1855 | return ret; | |
1aac20f5 MC |
1856 | #else |
1857 | return EXT_RETURN_FAIL; | |
1858 | #endif | |
43054d3d MC |
1859 | } |
1860 | ||
38b051a1 | 1861 | EXT_RETURN tls_construct_stoc_cryptopro_bug(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1862 | unsigned int context, X509 *x, |
f63a17d6 | 1863 | size_t chainidx) |
7da160b0 MC |
1864 | { |
1865 | const unsigned char cryptopro_ext[36] = { | |
1866 | 0xfd, 0xe8, /* 65000 */ | |
1867 | 0x00, 0x20, /* 32 bytes length */ | |
1868 | 0x30, 0x1e, 0x30, 0x08, 0x06, 0x06, 0x2a, 0x85, | |
1869 | 0x03, 0x02, 0x02, 0x09, 0x30, 0x08, 0x06, 0x06, | |
1870 | 0x2a, 0x85, 0x03, 0x02, 0x02, 0x16, 0x30, 0x08, | |
1871 | 0x06, 0x06, 0x2a, 0x85, 0x03, 0x02, 0x02, 0x17 | |
1872 | }; | |
1873 | ||
555cbb32 TS |
1874 | if (((s->s3.tmp.new_cipher->id & 0xFFFF) != 0x80 |
1875 | && (s->s3.tmp.new_cipher->id & 0xFFFF) != 0x81) | |
38b051a1 TM |
1876 | || (SSL_get_options(SSL_CONNECTION_GET_SSL(s)) |
1877 | & SSL_OP_CRYPTOPRO_TLSEXT_BUG) == 0) | |
b186a592 | 1878 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1879 | |
1880 | if (!WPACKET_memcpy(pkt, cryptopro_ext, sizeof(cryptopro_ext))) { | |
c48ffbcc | 1881 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1882 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1883 | } |
1884 | ||
b186a592 | 1885 | return EXT_RETURN_SENT; |
7da160b0 | 1886 | } |
0247086d | 1887 | |
38b051a1 | 1888 | EXT_RETURN tls_construct_stoc_early_data(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 1889 | unsigned int context, X509 *x, |
f63a17d6 | 1890 | size_t chainidx) |
38df5a45 | 1891 | { |
fe874d27 | 1892 | if (context == SSL_EXT_TLS1_3_NEW_SESSION_TICKET) { |
6594189f | 1893 | if (s->max_early_data == 0) |
b186a592 | 1894 | return EXT_RETURN_NOT_SENT; |
6594189f MC |
1895 | |
1896 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) | |
1897 | || !WPACKET_start_sub_packet_u16(pkt) | |
1898 | || !WPACKET_put_bytes_u32(pkt, s->max_early_data) | |
1899 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1900 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1901 | return EXT_RETURN_FAIL; |
6594189f MC |
1902 | } |
1903 | ||
b186a592 | 1904 | return EXT_RETURN_SENT; |
6594189f MC |
1905 | } |
1906 | ||
38df5a45 | 1907 | if (s->ext.early_data != SSL_EARLY_DATA_ACCEPTED) |
b186a592 | 1908 | return EXT_RETURN_NOT_SENT; |
38df5a45 MC |
1909 | |
1910 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) | |
1911 | || !WPACKET_start_sub_packet_u16(pkt) | |
1912 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1913 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1914 | return EXT_RETURN_FAIL; |
38df5a45 MC |
1915 | } |
1916 | ||
b186a592 | 1917 | return EXT_RETURN_SENT; |
38df5a45 MC |
1918 | } |
1919 | ||
38b051a1 TM |
1920 | EXT_RETURN tls_construct_stoc_psk(SSL_CONNECTION *s, WPACKET *pkt, |
1921 | unsigned int context, | |
f63a17d6 | 1922 | X509 *x, size_t chainidx) |
0247086d MC |
1923 | { |
1924 | if (!s->hit) | |
b186a592 | 1925 | return EXT_RETURN_NOT_SENT; |
0247086d MC |
1926 | |
1927 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk) | |
1928 | || !WPACKET_start_sub_packet_u16(pkt) | |
c96ce52c | 1929 | || !WPACKET_put_bytes_u16(pkt, s->ext.tick_identity) |
0247086d | 1930 | || !WPACKET_close(pkt)) { |
c48ffbcc | 1931 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1932 | return EXT_RETURN_FAIL; |
0247086d MC |
1933 | } |
1934 | ||
b186a592 | 1935 | return EXT_RETURN_SENT; |
0247086d | 1936 | } |