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25670f3e | 1 | /* |
a28d06f3 | 2 | * Copyright 2016-2021 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 | */ | |
1c4aa31d | 158 | s->servername_done = (s->session->ext.hostname != NULL) |
aff8c126 RS |
159 | && PACKET_equal(&hostname, s->session->ext.hostname, |
160 | strlen(s->session->ext.hostname)); | |
25670f3e MC |
161 | } |
162 | ||
163 | return 1; | |
164 | } | |
165 | ||
cf72c757 | 166 | int tls_parse_ctos_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 167 | X509 *x, size_t chainidx) |
cf72c757 F |
168 | { |
169 | unsigned int value; | |
170 | ||
171 | if (PACKET_remaining(pkt) != 1 || !PACKET_get_1(pkt, &value)) { | |
c48ffbcc | 172 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
cf72c757 F |
173 | return 0; |
174 | } | |
175 | ||
176 | /* Received |value| should be a valid max-fragment-length code. */ | |
177 | if (!IS_MAX_FRAGMENT_LENGTH_EXT_VALID(value)) { | |
f63a17d6 | 178 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 | 179 | SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); |
cf72c757 F |
180 | return 0; |
181 | } | |
182 | ||
183 | /* | |
184 | * RFC 6066: The negotiated length applies for the duration of the session | |
185 | * including session resumptions. | |
186 | * We should receive the same code as in resumed session ! | |
187 | */ | |
188 | if (s->hit && s->session->ext.max_fragment_len_mode != value) { | |
f63a17d6 | 189 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 | 190 | SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); |
cf72c757 F |
191 | return 0; |
192 | } | |
193 | ||
194 | /* | |
195 | * Store it in session, so it'll become binding for us | |
196 | * and we'll include it in a next Server Hello. | |
197 | */ | |
198 | s->session->ext.max_fragment_len_mode = value; | |
199 | return 1; | |
200 | } | |
201 | ||
25670f3e | 202 | #ifndef OPENSSL_NO_SRP |
61138358 | 203 | int tls_parse_ctos_srp(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 204 | size_t chainidx) |
25670f3e MC |
205 | { |
206 | PACKET srp_I; | |
207 | ||
208 | if (!PACKET_as_length_prefixed_1(pkt, &srp_I) | |
209 | || PACKET_contains_zero_byte(&srp_I)) { | |
c48ffbcc | 210 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
211 | return 0; |
212 | } | |
213 | ||
25670f3e | 214 | if (!PACKET_strndup(&srp_I, &s->srp_ctx.login)) { |
c48ffbcc | 215 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
216 | return 0; |
217 | } | |
218 | ||
219 | return 1; | |
220 | } | |
221 | #endif | |
222 | ||
61138358 | 223 | int tls_parse_ctos_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 224 | X509 *x, size_t chainidx) |
25670f3e MC |
225 | { |
226 | PACKET ec_point_format_list; | |
227 | ||
228 | if (!PACKET_as_length_prefixed_1(pkt, &ec_point_format_list) | |
229 | || PACKET_remaining(&ec_point_format_list) == 0) { | |
c48ffbcc | 230 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
231 | return 0; |
232 | } | |
233 | ||
234 | if (!s->hit) { | |
235 | if (!PACKET_memdup(&ec_point_format_list, | |
cd0fb43c MC |
236 | &s->ext.peer_ecpointformats, |
237 | &s->ext.peer_ecpointformats_len)) { | |
c48ffbcc | 238 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
239 | return 0; |
240 | } | |
241 | } | |
242 | ||
243 | return 1; | |
244 | } | |
25670f3e | 245 | |
61138358 | 246 | int tls_parse_ctos_session_ticket(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 247 | X509 *x, size_t chainidx) |
25670f3e | 248 | { |
aff8c126 RS |
249 | if (s->ext.session_ticket_cb && |
250 | !s->ext.session_ticket_cb(s, PACKET_data(pkt), | |
251 | PACKET_remaining(pkt), | |
252 | s->ext.session_ticket_cb_arg)) { | |
c48ffbcc | 253 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
254 | return 0; |
255 | } | |
256 | ||
257 | return 1; | |
258 | } | |
259 | ||
a7e6a3d8 P |
260 | int tls_parse_ctos_sig_algs_cert(SSL *s, PACKET *pkt, |
261 | ossl_unused unsigned int context, | |
262 | ossl_unused X509 *x, | |
263 | ossl_unused size_t chainidx) | |
c589c34e BK |
264 | { |
265 | PACKET supported_sig_algs; | |
266 | ||
267 | if (!PACKET_as_length_prefixed_2(pkt, &supported_sig_algs) | |
268 | || PACKET_remaining(&supported_sig_algs) == 0) { | |
c48ffbcc | 269 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
c589c34e BK |
270 | return 0; |
271 | } | |
272 | ||
273 | if (!s->hit && !tls1_save_sigalgs(s, &supported_sig_algs, 1)) { | |
c48ffbcc | 274 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
c589c34e BK |
275 | return 0; |
276 | } | |
277 | ||
278 | return 1; | |
279 | } | |
280 | ||
61138358 | 281 | int tls_parse_ctos_sig_algs(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 282 | size_t chainidx) |
25670f3e MC |
283 | { |
284 | PACKET supported_sig_algs; | |
285 | ||
286 | if (!PACKET_as_length_prefixed_2(pkt, &supported_sig_algs) | |
25670f3e | 287 | || PACKET_remaining(&supported_sig_algs) == 0) { |
c48ffbcc | 288 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
289 | return 0; |
290 | } | |
291 | ||
c589c34e | 292 | if (!s->hit && !tls1_save_sigalgs(s, &supported_sig_algs, 0)) { |
c48ffbcc | 293 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
294 | return 0; |
295 | } | |
296 | ||
297 | return 1; | |
298 | } | |
299 | ||
ab83e314 | 300 | #ifndef OPENSSL_NO_OCSP |
61138358 | 301 | int tls_parse_ctos_status_request(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 302 | X509 *x, size_t chainidx) |
25670f3e | 303 | { |
1266eefd MC |
304 | PACKET responder_id_list, exts; |
305 | ||
ded4a83d MC |
306 | /* We ignore this in a resumption handshake */ |
307 | if (s->hit) | |
308 | return 1; | |
309 | ||
e96e0f8e MC |
310 | /* Not defined if we get one of these in a client Certificate */ |
311 | if (x != NULL) | |
312 | return 1; | |
313 | ||
aff8c126 | 314 | if (!PACKET_get_1(pkt, (unsigned int *)&s->ext.status_type)) { |
c48ffbcc | 315 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
316 | return 0; |
317 | } | |
ab83e314 | 318 | |
aff8c126 | 319 | if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) { |
25670f3e | 320 | /* |
1266eefd | 321 | * We don't know what to do with any other type so ignore it. |
25670f3e | 322 | */ |
aff8c126 | 323 | s->ext.status_type = TLSEXT_STATUSTYPE_nothing; |
1266eefd MC |
324 | return 1; |
325 | } | |
25670f3e | 326 | |
1266eefd | 327 | if (!PACKET_get_length_prefixed_2 (pkt, &responder_id_list)) { |
c48ffbcc | 328 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1266eefd MC |
329 | return 0; |
330 | } | |
25670f3e | 331 | |
1266eefd MC |
332 | /* |
333 | * We remove any OCSP_RESPIDs from a previous handshake | |
334 | * to prevent unbounded memory growth - CVE-2016-6304 | |
335 | */ | |
aff8c126 | 336 | sk_OCSP_RESPID_pop_free(s->ext.ocsp.ids, OCSP_RESPID_free); |
1266eefd | 337 | if (PACKET_remaining(&responder_id_list) > 0) { |
aff8c126 RS |
338 | s->ext.ocsp.ids = sk_OCSP_RESPID_new_null(); |
339 | if (s->ext.ocsp.ids == NULL) { | |
c48ffbcc | 340 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); |
1266eefd MC |
341 | return 0; |
342 | } | |
343 | } else { | |
aff8c126 | 344 | s->ext.ocsp.ids = NULL; |
1266eefd | 345 | } |
25670f3e | 346 | |
1266eefd MC |
347 | while (PACKET_remaining(&responder_id_list) > 0) { |
348 | OCSP_RESPID *id; | |
349 | PACKET responder_id; | |
350 | const unsigned char *id_data; | |
25670f3e | 351 | |
1266eefd MC |
352 | if (!PACKET_get_length_prefixed_2(&responder_id_list, &responder_id) |
353 | || PACKET_remaining(&responder_id) == 0) { | |
c48ffbcc | 354 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1266eefd MC |
355 | return 0; |
356 | } | |
25670f3e | 357 | |
1266eefd | 358 | id_data = PACKET_data(&responder_id); |
1266eefd MC |
359 | id = d2i_OCSP_RESPID(NULL, &id_data, |
360 | (int)PACKET_remaining(&responder_id)); | |
361 | if (id == NULL) { | |
c48ffbcc | 362 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1266eefd | 363 | return 0; |
25670f3e MC |
364 | } |
365 | ||
1266eefd MC |
366 | if (id_data != PACKET_end(&responder_id)) { |
367 | OCSP_RESPID_free(id); | |
c48ffbcc | 368 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
f63a17d6 | 369 | |
25670f3e MC |
370 | return 0; |
371 | } | |
372 | ||
aff8c126 | 373 | if (!sk_OCSP_RESPID_push(s->ext.ocsp.ids, id)) { |
1266eefd | 374 | OCSP_RESPID_free(id); |
c48ffbcc | 375 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f63a17d6 | 376 | |
1266eefd MC |
377 | return 0; |
378 | } | |
379 | } | |
380 | ||
381 | /* Read in request_extensions */ | |
382 | if (!PACKET_as_length_prefixed_2(pkt, &exts)) { | |
c48ffbcc | 383 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1266eefd MC |
384 | return 0; |
385 | } | |
386 | ||
387 | if (PACKET_remaining(&exts) > 0) { | |
388 | const unsigned char *ext_data = PACKET_data(&exts); | |
389 | ||
aff8c126 | 390 | sk_X509_EXTENSION_pop_free(s->ext.ocsp.exts, |
1266eefd | 391 | X509_EXTENSION_free); |
aff8c126 | 392 | s->ext.ocsp.exts = |
1266eefd | 393 | d2i_X509_EXTENSIONS(NULL, &ext_data, (int)PACKET_remaining(&exts)); |
aff8c126 | 394 | if (s->ext.ocsp.exts == NULL || ext_data != PACKET_end(&exts)) { |
c48ffbcc | 395 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1266eefd | 396 | return 0; |
25670f3e | 397 | } |
25670f3e MC |
398 | } |
399 | ||
400 | return 1; | |
401 | } | |
ab83e314 | 402 | #endif |
25670f3e MC |
403 | |
404 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
61138358 | 405 | int tls_parse_ctos_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 406 | size_t chainidx) |
25670f3e | 407 | { |
1266eefd MC |
408 | /* |
409 | * We shouldn't accept this extension on a | |
410 | * renegotiation. | |
1266eefd | 411 | */ |
c7f47786 | 412 | if (SSL_IS_FIRST_HANDSHAKE(s)) |
555cbb32 | 413 | s->s3.npn_seen = 1; |
25670f3e MC |
414 | |
415 | return 1; | |
416 | } | |
417 | #endif | |
418 | ||
419 | /* | |
1266eefd | 420 | * Save the ALPN extension in a ClientHello.|pkt| holds the contents of the ALPN |
29bfd5b7 | 421 | * extension, not including type and length. Returns: 1 on success, 0 on error. |
25670f3e | 422 | */ |
61138358 | 423 | int tls_parse_ctos_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 424 | size_t chainidx) |
25670f3e MC |
425 | { |
426 | PACKET protocol_list, save_protocol_list, protocol; | |
427 | ||
c7f47786 | 428 | if (!SSL_IS_FIRST_HANDSHAKE(s)) |
25670f3e MC |
429 | return 1; |
430 | ||
431 | if (!PACKET_as_length_prefixed_2(pkt, &protocol_list) | |
432 | || PACKET_remaining(&protocol_list) < 2) { | |
c48ffbcc | 433 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
434 | return 0; |
435 | } | |
436 | ||
437 | save_protocol_list = protocol_list; | |
438 | do { | |
439 | /* Protocol names can't be empty. */ | |
440 | if (!PACKET_get_length_prefixed_1(&protocol_list, &protocol) | |
441 | || PACKET_remaining(&protocol) == 0) { | |
c48ffbcc | 442 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
443 | return 0; |
444 | } | |
445 | } while (PACKET_remaining(&protocol_list) != 0); | |
446 | ||
555cbb32 TS |
447 | OPENSSL_free(s->s3.alpn_proposed); |
448 | s->s3.alpn_proposed = NULL; | |
449 | s->s3.alpn_proposed_len = 0; | |
25670f3e | 450 | if (!PACKET_memdup(&save_protocol_list, |
555cbb32 | 451 | &s->s3.alpn_proposed, &s->s3.alpn_proposed_len)) { |
c48ffbcc | 452 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
453 | return 0; |
454 | } | |
455 | ||
456 | return 1; | |
457 | } | |
458 | ||
459 | #ifndef OPENSSL_NO_SRTP | |
61138358 | 460 | int tls_parse_ctos_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 461 | size_t chainidx) |
25670f3e | 462 | { |
25670f3e MC |
463 | STACK_OF(SRTP_PROTECTION_PROFILE) *srvr; |
464 | unsigned int ct, mki_len, id; | |
465 | int i, srtp_pref; | |
466 | PACKET subpkt; | |
467 | ||
468 | /* Ignore this if we have no SRTP profiles */ | |
469 | if (SSL_get_srtp_profiles(s) == NULL) | |
470 | return 1; | |
471 | ||
472 | /* Pull off the length of the cipher suite list and check it is even */ | |
1266eefd MC |
473 | if (!PACKET_get_net_2(pkt, &ct) || (ct & 1) != 0 |
474 | || !PACKET_get_sub_packet(pkt, &subpkt, ct)) { | |
c48ffbcc | 475 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
25670f3e | 476 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
25670f3e MC |
477 | return 0; |
478 | } | |
479 | ||
480 | srvr = SSL_get_srtp_profiles(s); | |
481 | s->srtp_profile = NULL; | |
482 | /* Search all profiles for a match initially */ | |
483 | srtp_pref = sk_SRTP_PROTECTION_PROFILE_num(srvr); | |
484 | ||
485 | while (PACKET_remaining(&subpkt)) { | |
486 | if (!PACKET_get_net_2(&subpkt, &id)) { | |
c48ffbcc | 487 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
f63a17d6 | 488 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
25670f3e MC |
489 | return 0; |
490 | } | |
491 | ||
492 | /* | |
493 | * Only look for match in profiles of higher preference than | |
494 | * current match. | |
495 | * If no profiles have been have been configured then this | |
496 | * does nothing. | |
497 | */ | |
498 | for (i = 0; i < srtp_pref; i++) { | |
d270de32 | 499 | SRTP_PROTECTION_PROFILE *sprof = |
1266eefd MC |
500 | sk_SRTP_PROTECTION_PROFILE_value(srvr, i); |
501 | ||
25670f3e MC |
502 | if (sprof->id == id) { |
503 | s->srtp_profile = sprof; | |
504 | srtp_pref = i; | |
505 | break; | |
506 | } | |
507 | } | |
508 | } | |
509 | ||
1266eefd | 510 | /* Now extract the MKI value as a sanity check, but discard it for now */ |
25670f3e | 511 | if (!PACKET_get_1(pkt, &mki_len)) { |
c48ffbcc | 512 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
f63a17d6 | 513 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
25670f3e MC |
514 | return 0; |
515 | } | |
516 | ||
517 | if (!PACKET_forward(pkt, mki_len) | |
518 | || PACKET_remaining(pkt)) { | |
c48ffbcc | 519 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_SRTP_MKI_VALUE); |
25670f3e MC |
520 | return 0; |
521 | } | |
522 | ||
523 | return 1; | |
524 | } | |
525 | #endif | |
526 | ||
61138358 | 527 | int tls_parse_ctos_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 528 | size_t chainidx) |
25670f3e MC |
529 | { |
530 | if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC)) | |
28a31a0a | 531 | s->ext.use_etm = 1; |
25670f3e MC |
532 | |
533 | return 1; | |
534 | } | |
535 | ||
b2f7e8c0 MC |
536 | /* |
537 | * Process a psk_kex_modes extension received in the ClientHello. |pkt| contains | |
538 | * the raw PACKET data for the extension. Returns 1 on success or 0 on failure. | |
b2f7e8c0 | 539 | */ |
61138358 | 540 | int tls_parse_ctos_psk_kex_modes(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 541 | X509 *x, size_t chainidx) |
b2f7e8c0 MC |
542 | { |
543 | #ifndef OPENSSL_NO_TLS1_3 | |
544 | PACKET psk_kex_modes; | |
545 | unsigned int mode; | |
546 | ||
547 | if (!PACKET_as_length_prefixed_1(pkt, &psk_kex_modes) | |
548 | || PACKET_remaining(&psk_kex_modes) == 0) { | |
c48ffbcc | 549 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
b2f7e8c0 MC |
550 | return 0; |
551 | } | |
552 | ||
553 | while (PACKET_get_1(&psk_kex_modes, &mode)) { | |
554 | if (mode == TLSEXT_KEX_MODE_KE_DHE) | |
555 | s->ext.psk_kex_mode |= TLSEXT_KEX_MODE_FLAG_KE_DHE; | |
e3c0d76b MC |
556 | else if (mode == TLSEXT_KEX_MODE_KE |
557 | && (s->options & SSL_OP_ALLOW_NO_DHE_KEX) != 0) | |
b2f7e8c0 MC |
558 | s->ext.psk_kex_mode |= TLSEXT_KEX_MODE_FLAG_KE; |
559 | } | |
560 | #endif | |
561 | ||
562 | return 1; | |
563 | } | |
564 | ||
25670f3e MC |
565 | /* |
566 | * Process a key_share extension received in the ClientHello. |pkt| contains | |
567 | * the raw PACKET data for the extension. Returns 1 on success or 0 on failure. | |
25670f3e | 568 | */ |
61138358 | 569 | int tls_parse_ctos_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 570 | size_t chainidx) |
25670f3e | 571 | { |
3cf96e88 | 572 | #ifndef OPENSSL_NO_TLS1_3 |
25670f3e MC |
573 | unsigned int group_id; |
574 | PACKET key_share_list, encoded_pt; | |
f48d826e DSH |
575 | const uint16_t *clntgroups, *srvrgroups; |
576 | size_t clnt_num_groups, srvr_num_groups; | |
43b95d73 | 577 | int found = 0; |
25670f3e | 578 | |
f4bbb37c | 579 | if (s->hit && (s->ext.psk_kex_mode & TLSEXT_KEX_MODE_FLAG_KE_DHE) == 0) |
25670f3e MC |
580 | return 1; |
581 | ||
582 | /* Sanity check */ | |
555cbb32 | 583 | if (s->s3.peer_tmp != NULL) { |
c48ffbcc | 584 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
25670f3e MC |
585 | return 0; |
586 | } | |
587 | ||
588 | if (!PACKET_as_length_prefixed_2(pkt, &key_share_list)) { | |
c48ffbcc | 589 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
25670f3e MC |
590 | return 0; |
591 | } | |
592 | ||
f48d826e DSH |
593 | /* Get our list of supported groups */ |
594 | tls1_get_supported_groups(s, &srvrgroups, &srvr_num_groups); | |
595 | /* Get the clients list of supported groups. */ | |
596 | tls1_get_peer_groups(s, &clntgroups, &clnt_num_groups); | |
597 | if (clnt_num_groups == 0) { | |
b6fdc12d MC |
598 | /* |
599 | * This can only happen if the supported_groups extension was not sent, | |
600 | * because we verify that the length is non-zero when we process that | |
601 | * extension. | |
602 | */ | |
c48ffbcc | 603 | SSLfatal(s, SSL_AD_MISSING_EXTENSION, |
f63a17d6 | 604 | SSL_R_MISSING_SUPPORTED_GROUPS_EXTENSION); |
b6fdc12d MC |
605 | return 0; |
606 | } | |
25670f3e | 607 | |
555cbb32 | 608 | if (s->s3.group_id != 0 && PACKET_remaining(&key_share_list) == 0) { |
43054d3d MC |
609 | /* |
610 | * If we set a group_id already, then we must have sent an HRR | |
611 | * requesting a new key_share. If we haven't got one then that is an | |
612 | * error | |
613 | */ | |
c48ffbcc | 614 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_KEY_SHARE); |
43054d3d MC |
615 | return 0; |
616 | } | |
617 | ||
25670f3e MC |
618 | while (PACKET_remaining(&key_share_list) > 0) { |
619 | if (!PACKET_get_net_2(&key_share_list, &group_id) | |
620 | || !PACKET_get_length_prefixed_2(&key_share_list, &encoded_pt) | |
621 | || PACKET_remaining(&encoded_pt) == 0) { | |
c48ffbcc | 622 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
25670f3e MC |
623 | return 0; |
624 | } | |
625 | ||
626 | /* | |
627 | * If we already found a suitable key_share we loop through the | |
628 | * rest to verify the structure, but don't process them. | |
629 | */ | |
630 | if (found) | |
631 | continue; | |
632 | ||
43054d3d MC |
633 | /* |
634 | * If we sent an HRR then the key_share sent back MUST be for the group | |
635 | * we requested, and must be the only key_share sent. | |
636 | */ | |
555cbb32 | 637 | if (s->s3.group_id != 0 |
0a10825a | 638 | && (ssl_group_id_tls13_to_internal(group_id) != s->s3.group_id |
43054d3d | 639 | || PACKET_remaining(&key_share_list) != 0)) { |
c48ffbcc | 640 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_KEY_SHARE); |
43054d3d MC |
641 | return 0; |
642 | } | |
643 | ||
25670f3e | 644 | /* Check if this share is in supported_groups sent from client */ |
f48d826e | 645 | if (!check_in_list(s, group_id, clntgroups, clnt_num_groups, 0)) { |
c48ffbcc | 646 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_KEY_SHARE); |
25670f3e MC |
647 | return 0; |
648 | } | |
649 | ||
650 | /* Check if this share is for a group we can use */ | |
f48d826e | 651 | if (!check_in_list(s, group_id, srvrgroups, srvr_num_groups, 1)) { |
25670f3e MC |
652 | /* Share not suitable */ |
653 | continue; | |
654 | } | |
655 | ||
0a10825a BE |
656 | s->s3.group_id = group_id; |
657 | /* Cache the selected group ID in the SSL_SESSION */ | |
658 | s->session->kex_group = group_id; | |
659 | ||
660 | group_id = ssl_group_id_tls13_to_internal(group_id); | |
661 | ||
ada66e78 | 662 | if ((s->s3.peer_tmp = ssl_generate_param_group(s, group_id)) == NULL) { |
c48ffbcc | 663 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
25670f3e MC |
664 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
665 | return 0; | |
666 | } | |
667 | ||
5ac8fb58 | 668 | if (EVP_PKEY_set1_encoded_public_key(s->s3.peer_tmp, |
25670f3e | 669 | PACKET_data(&encoded_pt), |
5ac8fb58 | 670 | PACKET_remaining(&encoded_pt)) <= 0) { |
c48ffbcc | 671 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_ECPOINT); |
25670f3e MC |
672 | return 0; |
673 | } | |
674 | ||
675 | found = 1; | |
676 | } | |
3cf96e88 | 677 | #endif |
25670f3e MC |
678 | |
679 | return 1; | |
680 | } | |
681 | ||
43054d3d MC |
682 | int tls_parse_ctos_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
683 | size_t chainidx) | |
684 | { | |
1aac20f5 | 685 | #ifndef OPENSSL_NO_TLS1_3 |
dd77962e | 686 | unsigned int format, version, key_share, group_id; |
43054d3d MC |
687 | EVP_MD_CTX *hctx; |
688 | EVP_PKEY *pkey; | |
689 | PACKET cookie, raw, chhash, appcookie; | |
690 | WPACKET hrrpkt; | |
691 | const unsigned char *data, *mdin, *ciphdata; | |
692 | unsigned char hmac[SHA256_DIGEST_LENGTH]; | |
693 | unsigned char hrr[MAX_HRR_SIZE]; | |
694 | size_t rawlen, hmaclen, hrrlen, ciphlen; | |
d0debc0a | 695 | unsigned long tm, now; |
43054d3d MC |
696 | |
697 | /* Ignore any cookie if we're not set up to verify it */ | |
3fa2812f | 698 | if (s->ctx->verify_stateless_cookie_cb == NULL |
555cbb32 | 699 | || (s->s3.flags & TLS1_FLAGS_STATELESS) == 0) |
43054d3d MC |
700 | return 1; |
701 | ||
702 | if (!PACKET_as_length_prefixed_2(pkt, &cookie)) { | |
c48ffbcc | 703 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
704 | return 0; |
705 | } | |
706 | ||
707 | raw = cookie; | |
708 | data = PACKET_data(&raw); | |
709 | rawlen = PACKET_remaining(&raw); | |
710 | if (rawlen < SHA256_DIGEST_LENGTH | |
711 | || !PACKET_forward(&raw, rawlen - SHA256_DIGEST_LENGTH)) { | |
c48ffbcc | 712 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
713 | return 0; |
714 | } | |
715 | mdin = PACKET_data(&raw); | |
716 | ||
717 | /* Verify the HMAC of the cookie */ | |
718 | hctx = EVP_MD_CTX_create(); | |
d8652be0 MC |
719 | pkey = EVP_PKEY_new_raw_private_key_ex(s->ctx->libctx, "HMAC", |
720 | s->ctx->propq, | |
721 | s->session_ctx->ext.cookie_hmac_key, | |
722 | sizeof(s->session_ctx->ext.cookie_hmac_key)); | |
43054d3d MC |
723 | if (hctx == NULL || pkey == NULL) { |
724 | EVP_MD_CTX_free(hctx); | |
725 | EVP_PKEY_free(pkey); | |
c48ffbcc | 726 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); |
43054d3d MC |
727 | return 0; |
728 | } | |
729 | ||
97ea1e7f | 730 | hmaclen = SHA256_DIGEST_LENGTH; |
d8652be0 | 731 | if (EVP_DigestSignInit_ex(hctx, NULL, "SHA2-256", s->ctx->libctx, |
d38b6ae9 | 732 | s->ctx->propq, pkey, NULL) <= 0 |
97ea1e7f MC |
733 | || EVP_DigestSign(hctx, hmac, &hmaclen, data, |
734 | rawlen - SHA256_DIGEST_LENGTH) <= 0 | |
43054d3d MC |
735 | || hmaclen != SHA256_DIGEST_LENGTH) { |
736 | EVP_MD_CTX_free(hctx); | |
737 | EVP_PKEY_free(pkey); | |
c48ffbcc | 738 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
739 | return 0; |
740 | } | |
741 | ||
742 | EVP_MD_CTX_free(hctx); | |
743 | EVP_PKEY_free(pkey); | |
744 | ||
745 | if (CRYPTO_memcmp(hmac, mdin, SHA256_DIGEST_LENGTH) != 0) { | |
c48ffbcc | 746 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_COOKIE_MISMATCH); |
43054d3d MC |
747 | return 0; |
748 | } | |
749 | ||
750 | if (!PACKET_get_net_2(&cookie, &format)) { | |
c48ffbcc | 751 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
752 | return 0; |
753 | } | |
754 | /* Check the cookie format is something we recognise. Ignore it if not */ | |
755 | if (format != COOKIE_STATE_FORMAT_VERSION) | |
756 | return 1; | |
757 | ||
758 | /* | |
759 | * The rest of these checks really shouldn't fail since we have verified the | |
760 | * HMAC above. | |
761 | */ | |
762 | ||
763 | /* Check the version number is sane */ | |
764 | if (!PACKET_get_net_2(&cookie, &version)) { | |
c48ffbcc | 765 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
766 | return 0; |
767 | } | |
768 | if (version != TLS1_3_VERSION) { | |
c48ffbcc | 769 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
43054d3d MC |
770 | SSL_R_BAD_PROTOCOL_VERSION_NUMBER); |
771 | return 0; | |
772 | } | |
773 | ||
dd77962e | 774 | if (!PACKET_get_net_2(&cookie, &group_id)) { |
c48ffbcc | 775 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
776 | return 0; |
777 | } | |
dd77962e | 778 | |
43054d3d MC |
779 | ciphdata = PACKET_data(&cookie); |
780 | if (!PACKET_forward(&cookie, 2)) { | |
c48ffbcc | 781 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
782 | return 0; |
783 | } | |
555cbb32 TS |
784 | if (group_id != s->s3.group_id |
785 | || s->s3.tmp.new_cipher | |
dd77962e MC |
786 | != ssl_get_cipher_by_char(s, ciphdata, 0)) { |
787 | /* | |
788 | * We chose a different cipher or group id this time around to what is | |
789 | * in the cookie. Something must have changed. | |
790 | */ | |
c48ffbcc | 791 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_CIPHER); |
43054d3d MC |
792 | return 0; |
793 | } | |
794 | ||
795 | if (!PACKET_get_1(&cookie, &key_share) | |
d0debc0a | 796 | || !PACKET_get_net_4(&cookie, &tm) |
43054d3d MC |
797 | || !PACKET_get_length_prefixed_2(&cookie, &chhash) |
798 | || !PACKET_get_length_prefixed_1(&cookie, &appcookie) | |
799 | || PACKET_remaining(&cookie) != SHA256_DIGEST_LENGTH) { | |
c48ffbcc | 800 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
43054d3d MC |
801 | return 0; |
802 | } | |
803 | ||
d0debc0a MC |
804 | /* We tolerate a cookie age of up to 10 minutes (= 60 * 10 seconds) */ |
805 | now = (unsigned long)time(NULL); | |
806 | if (tm > now || (now - tm) > 600) { | |
807 | /* Cookie is stale. Ignore it */ | |
808 | return 1; | |
809 | } | |
810 | ||
43054d3d | 811 | /* Verify the app cookie */ |
3fa2812f | 812 | if (s->ctx->verify_stateless_cookie_cb(s, PACKET_data(&appcookie), |
43054d3d | 813 | PACKET_remaining(&appcookie)) == 0) { |
c48ffbcc | 814 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_COOKIE_MISMATCH); |
43054d3d MC |
815 | return 0; |
816 | } | |
817 | ||
818 | /* | |
819 | * Reconstruct the HRR that we would have sent in response to the original | |
820 | * ClientHello so we can add it to the transcript hash. | |
821 | * Note: This won't work with custom HRR extensions | |
822 | */ | |
823 | if (!WPACKET_init_static_len(&hrrpkt, hrr, sizeof(hrr), 0)) { | |
c48ffbcc | 824 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
825 | return 0; |
826 | } | |
827 | if (!WPACKET_put_bytes_u8(&hrrpkt, SSL3_MT_SERVER_HELLO) | |
828 | || !WPACKET_start_sub_packet_u24(&hrrpkt) | |
829 | || !WPACKET_put_bytes_u16(&hrrpkt, TLS1_2_VERSION) | |
830 | || !WPACKET_memcpy(&hrrpkt, hrrrandom, SSL3_RANDOM_SIZE) | |
831 | || !WPACKET_sub_memcpy_u8(&hrrpkt, s->tmp_session_id, | |
832 | s->tmp_session_id_len) | |
555cbb32 | 833 | || !s->method->put_cipher_by_char(s->s3.tmp.new_cipher, &hrrpkt, |
43054d3d MC |
834 | &ciphlen) |
835 | || !WPACKET_put_bytes_u8(&hrrpkt, 0) | |
836 | || !WPACKET_start_sub_packet_u16(&hrrpkt)) { | |
837 | WPACKET_cleanup(&hrrpkt); | |
c48ffbcc | 838 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
839 | return 0; |
840 | } | |
841 | if (!WPACKET_put_bytes_u16(&hrrpkt, TLSEXT_TYPE_supported_versions) | |
842 | || !WPACKET_start_sub_packet_u16(&hrrpkt) | |
35e742ec | 843 | || !WPACKET_put_bytes_u16(&hrrpkt, s->version) |
43054d3d MC |
844 | || !WPACKET_close(&hrrpkt)) { |
845 | WPACKET_cleanup(&hrrpkt); | |
c48ffbcc | 846 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
847 | return 0; |
848 | } | |
849 | if (key_share) { | |
850 | if (!WPACKET_put_bytes_u16(&hrrpkt, TLSEXT_TYPE_key_share) | |
851 | || !WPACKET_start_sub_packet_u16(&hrrpkt) | |
555cbb32 | 852 | || !WPACKET_put_bytes_u16(&hrrpkt, s->s3.group_id) |
43054d3d MC |
853 | || !WPACKET_close(&hrrpkt)) { |
854 | WPACKET_cleanup(&hrrpkt); | |
c48ffbcc | 855 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
856 | return 0; |
857 | } | |
858 | } | |
859 | if (!WPACKET_put_bytes_u16(&hrrpkt, TLSEXT_TYPE_cookie) | |
860 | || !WPACKET_start_sub_packet_u16(&hrrpkt) | |
861 | || !WPACKET_sub_memcpy_u16(&hrrpkt, data, rawlen) | |
862 | || !WPACKET_close(&hrrpkt) /* cookie extension */ | |
863 | || !WPACKET_close(&hrrpkt) /* extension block */ | |
864 | || !WPACKET_close(&hrrpkt) /* message */ | |
865 | || !WPACKET_get_total_written(&hrrpkt, &hrrlen) | |
866 | || !WPACKET_finish(&hrrpkt)) { | |
867 | WPACKET_cleanup(&hrrpkt); | |
c48ffbcc | 868 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
869 | return 0; |
870 | } | |
871 | ||
872 | /* Reconstruct the transcript hash */ | |
873 | if (!create_synthetic_message_hash(s, PACKET_data(&chhash), | |
874 | PACKET_remaining(&chhash), hrr, | |
875 | hrrlen)) { | |
876 | /* SSLfatal() already called */ | |
877 | return 0; | |
878 | } | |
879 | ||
880 | /* Act as if this ClientHello came after a HelloRetryRequest */ | |
881 | s->hello_retry_request = 1; | |
882 | ||
c36001c3 | 883 | s->ext.cookieok = 1; |
1aac20f5 | 884 | #endif |
c36001c3 | 885 | |
43054d3d MC |
886 | return 1; |
887 | } | |
888 | ||
61138358 | 889 | int tls_parse_ctos_supported_groups(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 890 | X509 *x, size_t chainidx) |
25670f3e MC |
891 | { |
892 | PACKET supported_groups_list; | |
893 | ||
894 | /* Each group is 2 bytes and we must have at least 1. */ | |
895 | if (!PACKET_as_length_prefixed_2(pkt, &supported_groups_list) | |
896 | || PACKET_remaining(&supported_groups_list) == 0 | |
897 | || (PACKET_remaining(&supported_groups_list) % 2) != 0) { | |
c48ffbcc | 898 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
899 | return 0; |
900 | } | |
901 | ||
e3743355 | 902 | if (!s->hit || SSL_IS_TLS13(s)) { |
45436e61 MC |
903 | OPENSSL_free(s->ext.peer_supportedgroups); |
904 | s->ext.peer_supportedgroups = NULL; | |
905 | s->ext.peer_supportedgroups_len = 0; | |
9e84a42d | 906 | if (!tls1_save_u16(&supported_groups_list, |
45436e61 MC |
907 | &s->ext.peer_supportedgroups, |
908 | &s->ext.peer_supportedgroups_len)) { | |
c48ffbcc | 909 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
e3743355 BK |
910 | return 0; |
911 | } | |
25670f3e MC |
912 | } |
913 | ||
914 | return 1; | |
915 | } | |
25670f3e | 916 | |
61138358 | 917 | int tls_parse_ctos_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 918 | size_t chainidx) |
25670f3e MC |
919 | { |
920 | /* The extension must always be empty */ | |
921 | if (PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 922 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
25670f3e MC |
923 | return 0; |
924 | } | |
925 | ||
088dfa13 TS |
926 | if (s->options & SSL_OP_NO_EXTENDED_MASTER_SECRET) |
927 | return 1; | |
928 | ||
555cbb32 | 929 | s->s3.flags |= TLS1_FLAGS_RECEIVED_EXTMS; |
25670f3e MC |
930 | |
931 | return 1; | |
932 | } | |
7da160b0 | 933 | |
38df5a45 MC |
934 | |
935 | int tls_parse_ctos_early_data(SSL *s, PACKET *pkt, unsigned int context, | |
f63a17d6 | 936 | X509 *x, size_t chainidx) |
38df5a45 MC |
937 | { |
938 | if (PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 939 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
38df5a45 MC |
940 | return 0; |
941 | } | |
942 | ||
fc7129dc | 943 | if (s->hello_retry_request != SSL_HRR_NONE) { |
c48ffbcc | 944 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_EXTENSION); |
d4504fe5 MC |
945 | return 0; |
946 | } | |
947 | ||
38df5a45 MC |
948 | return 1; |
949 | } | |
950 | ||
6cc0b3c2 MC |
951 | static SSL_TICKET_STATUS tls_get_stateful_ticket(SSL *s, PACKET *tick, |
952 | SSL_SESSION **sess) | |
953 | { | |
954 | SSL_SESSION *tmpsess = NULL; | |
955 | ||
5f26ddff MC |
956 | s->ext.ticket_expected = 1; |
957 | ||
6cc0b3c2 MC |
958 | switch (PACKET_remaining(tick)) { |
959 | case 0: | |
960 | return SSL_TICKET_EMPTY; | |
961 | ||
962 | case SSL_MAX_SSL_SESSION_ID_LENGTH: | |
963 | break; | |
964 | ||
965 | default: | |
966 | return SSL_TICKET_NO_DECRYPT; | |
967 | } | |
968 | ||
969 | tmpsess = lookup_sess_in_cache(s, PACKET_data(tick), | |
970 | SSL_MAX_SSL_SESSION_ID_LENGTH); | |
971 | ||
972 | if (tmpsess == NULL) | |
973 | return SSL_TICKET_NO_DECRYPT; | |
974 | ||
6cc0b3c2 MC |
975 | *sess = tmpsess; |
976 | return SSL_TICKET_SUCCESS; | |
977 | } | |
978 | ||
61138358 | 979 | int tls_parse_ctos_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 980 | size_t chainidx) |
1053a6e2 MC |
981 | { |
982 | PACKET identities, binders, binder; | |
983 | size_t binderoffset, hashsize; | |
984 | SSL_SESSION *sess = NULL; | |
3a7c56b2 | 985 | unsigned int id, i, ext = 0; |
1053a6e2 MC |
986 | const EVP_MD *md = NULL; |
987 | ||
1a9f457c MC |
988 | /* |
989 | * If we have no PSK kex mode that we recognise then we can't resume so | |
990 | * ignore this extension | |
991 | */ | |
992 | if ((s->ext.psk_kex_mode | |
993 | & (TLSEXT_KEX_MODE_FLAG_KE | TLSEXT_KEX_MODE_FLAG_KE_DHE)) == 0) | |
994 | return 1; | |
995 | ||
1053a6e2 | 996 | if (!PACKET_get_length_prefixed_2(pkt, &identities)) { |
c48ffbcc | 997 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1053a6e2 MC |
998 | return 0; |
999 | } | |
1000 | ||
61fb5923 | 1001 | s->ext.ticket_expected = 0; |
1053a6e2 MC |
1002 | for (id = 0; PACKET_remaining(&identities) != 0; id++) { |
1003 | PACKET identity; | |
2c604cb9 | 1004 | unsigned long ticket_agel; |
f3d40db1 | 1005 | size_t idlen; |
1053a6e2 MC |
1006 | |
1007 | if (!PACKET_get_length_prefixed_2(&identities, &identity) | |
2c604cb9 | 1008 | || !PACKET_get_net_4(&identities, &ticket_agel)) { |
c48ffbcc | 1009 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1053a6e2 MC |
1010 | return 0; |
1011 | } | |
1012 | ||
f3d40db1 | 1013 | idlen = PACKET_remaining(&identity); |
3a7c56b2 | 1014 | if (s->psk_find_session_cb != NULL |
f3d40db1 | 1015 | && !s->psk_find_session_cb(s, PACKET_data(&identity), idlen, |
011d768a | 1016 | &sess)) { |
c48ffbcc | 1017 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_EXTENSION); |
011d768a MC |
1018 | return 0; |
1019 | } | |
1020 | ||
c2b290c3 | 1021 | #ifndef OPENSSL_NO_PSK |
1287dabd | 1022 | if (sess == NULL |
f3d40db1 MC |
1023 | && s->psk_server_callback != NULL |
1024 | && idlen <= PSK_MAX_IDENTITY_LEN) { | |
1025 | char *pskid = NULL; | |
1026 | unsigned char pskdata[PSK_MAX_PSK_LEN]; | |
1027 | unsigned int pskdatalen; | |
1028 | ||
1029 | if (!PACKET_strndup(&identity, &pskid)) { | |
c48ffbcc | 1030 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
1031 | return 0; |
1032 | } | |
1033 | pskdatalen = s->psk_server_callback(s, pskid, pskdata, | |
1034 | sizeof(pskdata)); | |
1035 | OPENSSL_free(pskid); | |
1036 | if (pskdatalen > PSK_MAX_PSK_LEN) { | |
c48ffbcc | 1037 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
1038 | return 0; |
1039 | } else if (pskdatalen > 0) { | |
1040 | const SSL_CIPHER *cipher; | |
1041 | const unsigned char tls13_aes128gcmsha256_id[] = { 0x13, 0x01 }; | |
1042 | ||
1043 | /* | |
1044 | * We found a PSK using an old style callback. We don't know | |
1045 | * the digest so we default to SHA256 as per the TLSv1.3 spec | |
1046 | */ | |
1047 | cipher = SSL_CIPHER_find(s, tls13_aes128gcmsha256_id); | |
1048 | if (cipher == NULL) { | |
1049 | OPENSSL_cleanse(pskdata, pskdatalen); | |
c48ffbcc | 1050 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
1051 | return 0; |
1052 | } | |
1053 | ||
1054 | sess = SSL_SESSION_new(); | |
1055 | if (sess == NULL | |
1056 | || !SSL_SESSION_set1_master_key(sess, pskdata, | |
1057 | pskdatalen) | |
1058 | || !SSL_SESSION_set_cipher(sess, cipher) | |
1059 | || !SSL_SESSION_set_protocol_version(sess, | |
1060 | TLS1_3_VERSION)) { | |
1061 | OPENSSL_cleanse(pskdata, pskdatalen); | |
c48ffbcc | 1062 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
1063 | goto err; |
1064 | } | |
1065 | OPENSSL_cleanse(pskdata, pskdatalen); | |
1066 | } | |
1067 | } | |
c2b290c3 | 1068 | #endif /* OPENSSL_NO_PSK */ |
f3d40db1 | 1069 | |
011d768a MC |
1070 | if (sess != NULL) { |
1071 | /* We found a PSK */ | |
3a7c56b2 | 1072 | SSL_SESSION *sesstmp = ssl_session_dup(sess, 0); |
1b8bacff | 1073 | |
3a7c56b2 | 1074 | if (sesstmp == NULL) { |
c48ffbcc | 1075 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
3a7c56b2 MC |
1076 | return 0; |
1077 | } | |
1078 | SSL_SESSION_free(sess); | |
1079 | sess = sesstmp; | |
1080 | ||
1081 | /* | |
1082 | * We've just been told to use this session for this context so | |
1083 | * make sure the sid_ctx matches up. | |
1084 | */ | |
1085 | memcpy(sess->sid_ctx, s->sid_ctx, s->sid_ctx_length); | |
1086 | sess->sid_ctx_length = s->sid_ctx_length; | |
1087 | ext = 1; | |
630369d9 MC |
1088 | if (id == 0) |
1089 | s->ext.early_data_ok = 1; | |
51256b34 | 1090 | s->ext.ticket_expected = 1; |
3a7c56b2 MC |
1091 | } else { |
1092 | uint32_t ticket_age = 0, now, agesec, agems; | |
61fb5923 MC |
1093 | int ret; |
1094 | ||
e880d4e5 MC |
1095 | /* |
1096 | * If we are using anti-replay protection then we behave as if | |
1097 | * SSL_OP_NO_TICKET is set - we are caching tickets anyway so there | |
1098 | * is no point in using full stateless tickets. | |
1099 | */ | |
1100 | if ((s->options & SSL_OP_NO_TICKET) != 0 | |
5d263fb7 MC |
1101 | || (s->max_early_data > 0 |
1102 | && (s->options & SSL_OP_NO_ANTI_REPLAY) == 0)) | |
6cc0b3c2 MC |
1103 | ret = tls_get_stateful_ticket(s, &identity, &sess); |
1104 | else | |
1105 | ret = tls_decrypt_ticket(s, PACKET_data(&identity), | |
1106 | PACKET_remaining(&identity), NULL, 0, | |
1107 | &sess); | |
61fb5923 MC |
1108 | |
1109 | if (ret == SSL_TICKET_EMPTY) { | |
c48ffbcc | 1110 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
61fb5923 MC |
1111 | return 0; |
1112 | } | |
3a7c56b2 | 1113 | |
df0fed9a TS |
1114 | if (ret == SSL_TICKET_FATAL_ERR_MALLOC |
1115 | || ret == SSL_TICKET_FATAL_ERR_OTHER) { | |
c48ffbcc | 1116 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
3a7c56b2 MC |
1117 | return 0; |
1118 | } | |
61fb5923 | 1119 | if (ret == SSL_TICKET_NONE || ret == SSL_TICKET_NO_DECRYPT) |
3a7c56b2 MC |
1120 | continue; |
1121 | ||
66d7de16 MC |
1122 | /* Check for replay */ |
1123 | if (s->max_early_data > 0 | |
5d263fb7 | 1124 | && (s->options & SSL_OP_NO_ANTI_REPLAY) == 0 |
66d7de16 MC |
1125 | && !SSL_CTX_remove_session(s->session_ctx, sess)) { |
1126 | SSL_SESSION_free(sess); | |
1127 | sess = NULL; | |
1128 | continue; | |
1129 | } | |
1130 | ||
3a7c56b2 MC |
1131 | ticket_age = (uint32_t)ticket_agel; |
1132 | now = (uint32_t)time(NULL); | |
1133 | agesec = now - (uint32_t)sess->time; | |
1134 | agems = agesec * (uint32_t)1000; | |
1135 | ticket_age -= sess->ext.tick_age_add; | |
1136 | ||
1137 | /* | |
1138 | * For simplicity we do our age calculations in seconds. If the | |
1139 | * client does it in ms then it could appear that their ticket age | |
1140 | * is longer than ours (our ticket age calculation should always be | |
1141 | * slightly longer than the client's due to the network latency). | |
1142 | * Therefore we add 1000ms to our age calculation to adjust for | |
1143 | * rounding errors. | |
1144 | */ | |
630369d9 MC |
1145 | if (id == 0 |
1146 | && sess->timeout >= (long)agesec | |
3a7c56b2 MC |
1147 | && agems / (uint32_t)1000 == agesec |
1148 | && ticket_age <= agems + 1000 | |
1149 | && ticket_age + TICKET_AGE_ALLOWANCE >= agems + 1000) { | |
1150 | /* | |
1151 | * Ticket age is within tolerance and not expired. We allow it | |
1152 | * for early data | |
1153 | */ | |
1154 | s->ext.early_data_ok = 1; | |
1155 | } | |
1053a6e2 | 1156 | } |
1053a6e2 | 1157 | |
c8f6c28a MC |
1158 | md = ssl_md(s->ctx, sess->cipher->algorithm2); |
1159 | if (!EVP_MD_is_a(md, | |
ed576acd TM |
1160 | EVP_MD_get0_name(ssl_md(s->ctx, |
1161 | s->s3.tmp.new_cipher->algorithm2)))) { | |
0de6d66d | 1162 | /* The ciphersuite is not compatible with this session. */ |
1053a6e2 MC |
1163 | SSL_SESSION_free(sess); |
1164 | sess = NULL; | |
630369d9 | 1165 | s->ext.early_data_ok = 0; |
51256b34 | 1166 | s->ext.ticket_expected = 0; |
1053a6e2 MC |
1167 | continue; |
1168 | } | |
1053a6e2 MC |
1169 | break; |
1170 | } | |
1171 | ||
1172 | if (sess == NULL) | |
1173 | return 1; | |
1174 | ||
1175 | binderoffset = PACKET_data(pkt) - (const unsigned char *)s->init_buf->data; | |
ed576acd | 1176 | hashsize = EVP_MD_get_size(md); |
1053a6e2 MC |
1177 | |
1178 | if (!PACKET_get_length_prefixed_2(pkt, &binders)) { | |
c48ffbcc | 1179 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1053a6e2 MC |
1180 | goto err; |
1181 | } | |
1182 | ||
1183 | for (i = 0; i <= id; i++) { | |
1184 | if (!PACKET_get_length_prefixed_1(&binders, &binder)) { | |
c48ffbcc | 1185 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
1053a6e2 MC |
1186 | goto err; |
1187 | } | |
1188 | } | |
1189 | ||
2894e9cb | 1190 | if (PACKET_remaining(&binder) != hashsize) { |
c48ffbcc | 1191 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
2894e9cb MC |
1192 | goto err; |
1193 | } | |
1194 | if (tls_psk_do_binder(s, md, (const unsigned char *)s->init_buf->data, | |
1195 | binderoffset, PACKET_data(&binder), NULL, sess, 0, | |
1196 | ext) != 1) { | |
635c8f77 | 1197 | /* SSLfatal() already called */ |
1053a6e2 MC |
1198 | goto err; |
1199 | } | |
1200 | ||
c96ce52c | 1201 | s->ext.tick_identity = id; |
2c604cb9 | 1202 | |
1053a6e2 MC |
1203 | SSL_SESSION_free(s->session); |
1204 | s->session = sess; | |
1053a6e2 MC |
1205 | return 1; |
1206 | err: | |
312e9387 | 1207 | SSL_SESSION_free(sess); |
1053a6e2 MC |
1208 | return 0; |
1209 | } | |
1210 | ||
a7e6a3d8 P |
1211 | int tls_parse_ctos_post_handshake_auth(SSL *s, PACKET *pkt, |
1212 | ossl_unused unsigned int context, | |
1213 | ossl_unused X509 *x, | |
1214 | ossl_unused size_t chainidx) | |
9d75dce3 TS |
1215 | { |
1216 | if (PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 1217 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
9d75dce3 TS |
1218 | SSL_R_POST_HANDSHAKE_AUTH_ENCODING_ERR); |
1219 | return 0; | |
1220 | } | |
1221 | ||
1222 | s->post_handshake_auth = SSL_PHA_EXT_RECEIVED; | |
1223 | ||
1224 | return 1; | |
1225 | } | |
1226 | ||
1266eefd MC |
1227 | /* |
1228 | * Add the server's renegotiation binding | |
1229 | */ | |
b186a592 MC |
1230 | EXT_RETURN tls_construct_stoc_renegotiate(SSL *s, WPACKET *pkt, |
1231 | unsigned int context, X509 *x, | |
f63a17d6 | 1232 | size_t chainidx) |
7da160b0 | 1233 | { |
555cbb32 | 1234 | if (!s->s3.send_connection_binding) |
b186a592 | 1235 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 1236 | |
db0f35dd | 1237 | /* Still add this even if SSL_OP_NO_RENEGOTIATION is set */ |
7da160b0 MC |
1238 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_renegotiate) |
1239 | || !WPACKET_start_sub_packet_u16(pkt) | |
1240 | || !WPACKET_start_sub_packet_u8(pkt) | |
555cbb32 TS |
1241 | || !WPACKET_memcpy(pkt, s->s3.previous_client_finished, |
1242 | s->s3.previous_client_finished_len) | |
1243 | || !WPACKET_memcpy(pkt, s->s3.previous_server_finished, | |
1244 | s->s3.previous_server_finished_len) | |
7da160b0 MC |
1245 | || !WPACKET_close(pkt) |
1246 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1247 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1248 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1249 | } |
1250 | ||
b186a592 | 1251 | return EXT_RETURN_SENT; |
7da160b0 MC |
1252 | } |
1253 | ||
b186a592 MC |
1254 | EXT_RETURN tls_construct_stoc_server_name(SSL *s, WPACKET *pkt, |
1255 | unsigned int context, X509 *x, | |
f63a17d6 | 1256 | size_t chainidx) |
7da160b0 | 1257 | { |
7955c1f1 MC |
1258 | if (s->servername_done != 1) |
1259 | return EXT_RETURN_NOT_SENT; | |
1260 | ||
1261 | /* | |
1262 | * Prior to TLSv1.3 we ignore any SNI in the current handshake if resuming. | |
1263 | * We just use the servername from the initial handshake. | |
1264 | */ | |
1265 | if (s->hit && !SSL_IS_TLS13(s)) | |
b186a592 | 1266 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1267 | |
1268 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_server_name) | |
1269 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
c48ffbcc | 1270 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1271 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1272 | } |
1273 | ||
b186a592 | 1274 | return EXT_RETURN_SENT; |
7da160b0 MC |
1275 | } |
1276 | ||
cf72c757 F |
1277 | /* Add/include the server's max fragment len extension into ServerHello */ |
1278 | EXT_RETURN tls_construct_stoc_maxfragmentlen(SSL *s, WPACKET *pkt, | |
1279 | unsigned int context, X509 *x, | |
f63a17d6 | 1280 | size_t chainidx) |
cf72c757 F |
1281 | { |
1282 | if (!USE_MAX_FRAGMENT_LENGTH_EXT(s->session)) | |
1283 | return EXT_RETURN_NOT_SENT; | |
1284 | ||
1285 | /*- | |
1286 | * 4 bytes for this extension type and extension length | |
1287 | * 1 byte for the Max Fragment Length code value. | |
1288 | */ | |
1289 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_max_fragment_length) | |
1290 | || !WPACKET_start_sub_packet_u16(pkt) | |
1291 | || !WPACKET_put_bytes_u8(pkt, s->session->ext.max_fragment_len_mode) | |
1292 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1293 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
cf72c757 F |
1294 | return EXT_RETURN_FAIL; |
1295 | } | |
1296 | ||
1297 | return EXT_RETURN_SENT; | |
1298 | } | |
1299 | ||
b186a592 MC |
1300 | EXT_RETURN tls_construct_stoc_ec_pt_formats(SSL *s, WPACKET *pkt, |
1301 | unsigned int context, X509 *x, | |
f63a17d6 | 1302 | size_t chainidx) |
7da160b0 | 1303 | { |
555cbb32 TS |
1304 | unsigned long alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
1305 | unsigned long alg_a = s->s3.tmp.new_cipher->algorithm_auth; | |
89247375 | 1306 | int using_ecc = ((alg_k & SSL_kECDHE) || (alg_a & SSL_aECDSA)) |
cd0fb43c | 1307 | && (s->ext.peer_ecpointformats != NULL); |
7da160b0 MC |
1308 | const unsigned char *plist; |
1309 | size_t plistlen; | |
1310 | ||
1311 | if (!using_ecc) | |
b186a592 | 1312 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1313 | |
1314 | tls1_get_formatlist(s, &plist, &plistlen); | |
7da160b0 MC |
1315 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_ec_point_formats) |
1316 | || !WPACKET_start_sub_packet_u16(pkt) | |
1317 | || !WPACKET_sub_memcpy_u8(pkt, plist, plistlen) | |
1318 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1319 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1320 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1321 | } |
1322 | ||
b186a592 | 1323 | return EXT_RETURN_SENT; |
7da160b0 | 1324 | } |
7da160b0 | 1325 | |
b186a592 MC |
1326 | EXT_RETURN tls_construct_stoc_supported_groups(SSL *s, WPACKET *pkt, |
1327 | unsigned int context, X509 *x, | |
f63a17d6 | 1328 | size_t chainidx) |
6af87546 | 1329 | { |
9e84a42d | 1330 | const uint16_t *groups; |
6af87546 | 1331 | size_t numgroups, i, first = 1; |
9d2d857f | 1332 | int version; |
6af87546 | 1333 | |
555cbb32 TS |
1334 | /* s->s3.group_id is non zero if we accepted a key_share */ |
1335 | if (s->s3.group_id == 0) | |
b186a592 | 1336 | return EXT_RETURN_NOT_SENT; |
6af87546 MC |
1337 | |
1338 | /* Get our list of supported groups */ | |
ff6d20a6 | 1339 | tls1_get_supported_groups(s, &groups, &numgroups); |
34e5292c | 1340 | if (numgroups == 0) { |
c48ffbcc | 1341 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1342 | return EXT_RETURN_FAIL; |
6af87546 MC |
1343 | } |
1344 | ||
1345 | /* Copy group ID if supported */ | |
9d2d857f | 1346 | version = SSL_version(s); |
9e84a42d DSH |
1347 | for (i = 0; i < numgroups; i++) { |
1348 | uint16_t group = groups[i]; | |
1349 | ||
8b1db5d3 | 1350 | if (tls_valid_group(s, group, version, version, 0, NULL) |
dbc6268f | 1351 | && tls_group_allowed(s, group, SSL_SECOP_CURVE_SUPPORTED)) { |
6af87546 MC |
1352 | if (first) { |
1353 | /* | |
1354 | * Check if the client is already using our preferred group. If | |
1355 | * so we don't need to add this extension | |
1356 | */ | |
555cbb32 | 1357 | if (s->s3.group_id == group) |
b186a592 | 1358 | return EXT_RETURN_NOT_SENT; |
6af87546 MC |
1359 | |
1360 | /* Add extension header */ | |
1361 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_groups) | |
1362 | /* Sub-packet for supported_groups extension */ | |
1363 | || !WPACKET_start_sub_packet_u16(pkt) | |
1364 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
c48ffbcc | 1365 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1366 | return EXT_RETURN_FAIL; |
6af87546 MC |
1367 | } |
1368 | ||
1369 | first = 0; | |
1370 | } | |
9e84a42d | 1371 | if (!WPACKET_put_bytes_u16(pkt, group)) { |
c48ffbcc | 1372 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1373 | return EXT_RETURN_FAIL; |
6af87546 MC |
1374 | } |
1375 | } | |
1376 | } | |
1377 | ||
1378 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
c48ffbcc | 1379 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1380 | return EXT_RETURN_FAIL; |
6af87546 MC |
1381 | } |
1382 | ||
b186a592 | 1383 | return EXT_RETURN_SENT; |
6af87546 MC |
1384 | } |
1385 | ||
b186a592 MC |
1386 | EXT_RETURN tls_construct_stoc_session_ticket(SSL *s, WPACKET *pkt, |
1387 | unsigned int context, X509 *x, | |
f63a17d6 | 1388 | size_t chainidx) |
7da160b0 | 1389 | { |
aff8c126 RS |
1390 | if (!s->ext.ticket_expected || !tls_use_ticket(s)) { |
1391 | s->ext.ticket_expected = 0; | |
b186a592 | 1392 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1393 | } |
1394 | ||
1395 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket) | |
1396 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
c48ffbcc | 1397 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1398 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1399 | } |
1400 | ||
b186a592 | 1401 | return EXT_RETURN_SENT; |
7da160b0 MC |
1402 | } |
1403 | ||
ab83e314 | 1404 | #ifndef OPENSSL_NO_OCSP |
b186a592 MC |
1405 | EXT_RETURN tls_construct_stoc_status_request(SSL *s, WPACKET *pkt, |
1406 | unsigned int context, X509 *x, | |
f63a17d6 | 1407 | size_t chainidx) |
7da160b0 | 1408 | { |
debb64a0 MC |
1409 | /* We don't currently support this extension inside a CertificateRequest */ |
1410 | if (context == SSL_EXT_TLS1_3_CERTIFICATE_REQUEST) | |
1411 | return EXT_RETURN_NOT_SENT; | |
1412 | ||
aff8c126 | 1413 | if (!s->ext.status_expected) |
b186a592 | 1414 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 1415 | |
8521ced6 | 1416 | if (SSL_IS_TLS13(s) && chainidx != 0) |
b186a592 | 1417 | return EXT_RETURN_NOT_SENT; |
e96e0f8e | 1418 | |
7da160b0 | 1419 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request) |
f63e4288 | 1420 | || !WPACKET_start_sub_packet_u16(pkt)) { |
c48ffbcc | 1421 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1422 | return EXT_RETURN_FAIL; |
f63e4288 MC |
1423 | } |
1424 | ||
1425 | /* | |
1426 | * In TLSv1.3 we include the certificate status itself. In <= TLSv1.2 we | |
1427 | * send back an empty extension, with the certificate status appearing as a | |
1428 | * separate message | |
1429 | */ | |
3ec8d113 MC |
1430 | if (SSL_IS_TLS13(s) && !tls_construct_cert_status_body(s, pkt)) { |
1431 | /* SSLfatal() already called */ | |
56d36288 | 1432 | return EXT_RETURN_FAIL; |
3ec8d113 MC |
1433 | } |
1434 | if (!WPACKET_close(pkt)) { | |
c48ffbcc | 1435 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1436 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1437 | } |
1438 | ||
b186a592 | 1439 | return EXT_RETURN_SENT; |
7da160b0 | 1440 | } |
ab83e314 | 1441 | #endif |
7da160b0 | 1442 | |
7da160b0 | 1443 | #ifndef OPENSSL_NO_NEXTPROTONEG |
b186a592 MC |
1444 | EXT_RETURN tls_construct_stoc_next_proto_neg(SSL *s, WPACKET *pkt, |
1445 | unsigned int context, X509 *x, | |
f63a17d6 | 1446 | size_t chainidx) |
7da160b0 MC |
1447 | { |
1448 | const unsigned char *npa; | |
1449 | unsigned int npalen; | |
1450 | int ret; | |
555cbb32 | 1451 | int npn_seen = s->s3.npn_seen; |
7da160b0 | 1452 | |
555cbb32 | 1453 | s->s3.npn_seen = 0; |
aff8c126 | 1454 | if (!npn_seen || s->ctx->ext.npn_advertised_cb == NULL) |
b186a592 | 1455 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 1456 | |
aff8c126 RS |
1457 | ret = s->ctx->ext.npn_advertised_cb(s, &npa, &npalen, |
1458 | s->ctx->ext.npn_advertised_cb_arg); | |
7da160b0 MC |
1459 | if (ret == SSL_TLSEXT_ERR_OK) { |
1460 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_next_proto_neg) | |
1461 | || !WPACKET_sub_memcpy_u16(pkt, npa, npalen)) { | |
c48ffbcc | 1462 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1463 | return EXT_RETURN_FAIL; |
7da160b0 | 1464 | } |
555cbb32 | 1465 | s->s3.npn_seen = 1; |
7da160b0 MC |
1466 | } |
1467 | ||
b186a592 | 1468 | return EXT_RETURN_SENT; |
7da160b0 MC |
1469 | } |
1470 | #endif | |
1471 | ||
b186a592 | 1472 | EXT_RETURN tls_construct_stoc_alpn(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 1473 | X509 *x, size_t chainidx) |
7da160b0 | 1474 | { |
555cbb32 | 1475 | if (s->s3.alpn_selected == NULL) |
b186a592 | 1476 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1477 | |
1478 | if (!WPACKET_put_bytes_u16(pkt, | |
1479 | TLSEXT_TYPE_application_layer_protocol_negotiation) | |
1480 | || !WPACKET_start_sub_packet_u16(pkt) | |
1481 | || !WPACKET_start_sub_packet_u16(pkt) | |
555cbb32 TS |
1482 | || !WPACKET_sub_memcpy_u8(pkt, s->s3.alpn_selected, |
1483 | s->s3.alpn_selected_len) | |
7da160b0 MC |
1484 | || !WPACKET_close(pkt) |
1485 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1486 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1487 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1488 | } |
1489 | ||
b186a592 | 1490 | return EXT_RETURN_SENT; |
7da160b0 MC |
1491 | } |
1492 | ||
1493 | #ifndef OPENSSL_NO_SRTP | |
b186a592 MC |
1494 | EXT_RETURN tls_construct_stoc_use_srtp(SSL *s, WPACKET *pkt, |
1495 | unsigned int context, X509 *x, | |
f63a17d6 | 1496 | size_t chainidx) |
7da160b0 MC |
1497 | { |
1498 | if (s->srtp_profile == NULL) | |
b186a592 | 1499 | return EXT_RETURN_NOT_SENT; |
a1448c26 | 1500 | |
7da160b0 MC |
1501 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp) |
1502 | || !WPACKET_start_sub_packet_u16(pkt) | |
1503 | || !WPACKET_put_bytes_u16(pkt, 2) | |
1504 | || !WPACKET_put_bytes_u16(pkt, s->srtp_profile->id) | |
1505 | || !WPACKET_put_bytes_u8(pkt, 0) | |
1506 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1507 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1508 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1509 | } |
1510 | ||
b186a592 | 1511 | return EXT_RETURN_SENT; |
7da160b0 MC |
1512 | } |
1513 | #endif | |
1514 | ||
b186a592 | 1515 | EXT_RETURN tls_construct_stoc_etm(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 1516 | X509 *x, size_t chainidx) |
7da160b0 | 1517 | { |
28a31a0a | 1518 | if (!s->ext.use_etm) |
b186a592 | 1519 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1520 | |
1521 | /* | |
1522 | * Don't use encrypt_then_mac if AEAD or RC4 might want to disable | |
1523 | * for other cases too. | |
1524 | */ | |
555cbb32 TS |
1525 | if (s->s3.tmp.new_cipher->algorithm_mac == SSL_AEAD |
1526 | || s->s3.tmp.new_cipher->algorithm_enc == SSL_RC4 | |
1527 | || s->s3.tmp.new_cipher->algorithm_enc == SSL_eGOST2814789CNT | |
5a5530a2 DB |
1528 | || s->s3.tmp.new_cipher->algorithm_enc == SSL_eGOST2814789CNT12 |
1529 | || s->s3.tmp.new_cipher->algorithm_enc == SSL_MAGMA | |
1530 | || s->s3.tmp.new_cipher->algorithm_enc == SSL_KUZNYECHIK) { | |
28a31a0a | 1531 | s->ext.use_etm = 0; |
b186a592 | 1532 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1533 | } |
1534 | ||
1535 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac) | |
1536 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
c48ffbcc | 1537 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1538 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1539 | } |
1540 | ||
b186a592 | 1541 | return EXT_RETURN_SENT; |
7da160b0 MC |
1542 | } |
1543 | ||
b186a592 | 1544 | EXT_RETURN tls_construct_stoc_ems(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 1545 | X509 *x, size_t chainidx) |
7da160b0 | 1546 | { |
555cbb32 | 1547 | if ((s->s3.flags & TLS1_FLAGS_RECEIVED_EXTMS) == 0) |
b186a592 | 1548 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1549 | |
1550 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret) | |
1551 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
c48ffbcc | 1552 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1553 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1554 | } |
1555 | ||
b186a592 | 1556 | return EXT_RETURN_SENT; |
7da160b0 MC |
1557 | } |
1558 | ||
88050dd1 MC |
1559 | EXT_RETURN tls_construct_stoc_supported_versions(SSL *s, WPACKET *pkt, |
1560 | unsigned int context, X509 *x, | |
1561 | size_t chainidx) | |
1562 | { | |
27e462f1 | 1563 | if (!ossl_assert(SSL_IS_TLS13(s))) { |
c48ffbcc | 1564 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
27e462f1 MC |
1565 | return EXT_RETURN_FAIL; |
1566 | } | |
88050dd1 MC |
1567 | |
1568 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_versions) | |
1569 | || !WPACKET_start_sub_packet_u16(pkt) | |
35e742ec | 1570 | || !WPACKET_put_bytes_u16(pkt, s->version) |
88050dd1 | 1571 | || !WPACKET_close(pkt)) { |
c48ffbcc | 1572 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
88050dd1 MC |
1573 | return EXT_RETURN_FAIL; |
1574 | } | |
1575 | ||
1576 | return EXT_RETURN_SENT; | |
1577 | } | |
1578 | ||
b186a592 MC |
1579 | EXT_RETURN tls_construct_stoc_key_share(SSL *s, WPACKET *pkt, |
1580 | unsigned int context, X509 *x, | |
f63a17d6 | 1581 | size_t chainidx) |
7da160b0 | 1582 | { |
3cf96e88 | 1583 | #ifndef OPENSSL_NO_TLS1_3 |
7da160b0 MC |
1584 | unsigned char *encodedPoint; |
1585 | size_t encoded_pt_len = 0; | |
555cbb32 | 1586 | EVP_PKEY *ckey = s->s3.peer_tmp, *skey = NULL; |
8b17fbaf | 1587 | const TLS_GROUP_INFO *ginf = NULL; |
7da160b0 | 1588 | |
dd77962e MC |
1589 | if (s->hello_retry_request == SSL_HRR_PENDING) { |
1590 | if (ckey != NULL) { | |
1591 | /* Original key_share was acceptable so don't ask for another one */ | |
1592 | return EXT_RETURN_NOT_SENT; | |
1593 | } | |
1594 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
1595 | || !WPACKET_start_sub_packet_u16(pkt) | |
0a10825a BE |
1596 | || !WPACKET_put_bytes_u16(pkt, ssl_group_id_internal_to_tls13( |
1597 | s->s3.group_id)) | |
dd77962e | 1598 | || !WPACKET_close(pkt)) { |
c48ffbcc | 1599 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
dd77962e | 1600 | return EXT_RETURN_FAIL; |
7d061fce MC |
1601 | } |
1602 | ||
dd77962e MC |
1603 | return EXT_RETURN_SENT; |
1604 | } | |
1605 | ||
1606 | if (ckey == NULL) { | |
1607 | /* No key_share received from client - must be resuming */ | |
0247086d | 1608 | if (!s->hit || !tls13_generate_handshake_secret(s, NULL, 0)) { |
c48ffbcc | 1609 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1610 | return EXT_RETURN_FAIL; |
0247086d | 1611 | } |
b186a592 | 1612 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 1613 | } |
e776858b BK |
1614 | if (s->hit && (s->ext.psk_kex_mode & TLSEXT_KEX_MODE_FLAG_KE_DHE) == 0) { |
1615 | /* | |
1616 | * PSK ('hit') and explicitly not doing DHE (if the client sent the | |
1617 | * DHE option we always take it); don't send key share. | |
1618 | */ | |
1619 | return EXT_RETURN_NOT_SENT; | |
1620 | } | |
7da160b0 MC |
1621 | |
1622 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
1623 | || !WPACKET_start_sub_packet_u16(pkt) | |
555cbb32 | 1624 | || !WPACKET_put_bytes_u16(pkt, s->s3.group_id)) { |
c48ffbcc | 1625 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1626 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1627 | } |
1628 | ||
8b17fbaf | 1629 | if ((ginf = tls1_group_id_lookup(s->ctx, s->s3.group_id)) == NULL) { |
c48ffbcc | 1630 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1631 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1632 | } |
1633 | ||
8b17fbaf NT |
1634 | if (!ginf->is_kem) { |
1635 | /* Regular KEX */ | |
1636 | skey = ssl_generate_pkey(s, ckey); | |
1637 | if (skey == NULL) { | |
c48ffbcc | 1638 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); |
8b17fbaf NT |
1639 | return EXT_RETURN_FAIL; |
1640 | } | |
7da160b0 | 1641 | |
8b17fbaf | 1642 | /* Generate encoding of server key */ |
5ac8fb58 | 1643 | encoded_pt_len = EVP_PKEY_get1_encoded_public_key(skey, &encodedPoint); |
8b17fbaf | 1644 | if (encoded_pt_len == 0) { |
c48ffbcc | 1645 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EC_LIB); |
8b17fbaf NT |
1646 | EVP_PKEY_free(skey); |
1647 | return EXT_RETURN_FAIL; | |
1648 | } | |
1649 | ||
1650 | if (!WPACKET_sub_memcpy_u16(pkt, encodedPoint, encoded_pt_len) | |
1651 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1652 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
8b17fbaf NT |
1653 | EVP_PKEY_free(skey); |
1654 | OPENSSL_free(encodedPoint); | |
1655 | return EXT_RETURN_FAIL; | |
1656 | } | |
7da160b0 | 1657 | OPENSSL_free(encodedPoint); |
7da160b0 | 1658 | |
8b17fbaf NT |
1659 | /* |
1660 | * This causes the crypto state to be updated based on the derived keys | |
1661 | */ | |
1662 | s->s3.tmp.pkey = skey; | |
1663 | if (ssl_derive(s, skey, ckey, 1) == 0) { | |
1664 | /* SSLfatal() already called */ | |
1665 | return EXT_RETURN_FAIL; | |
1666 | } | |
1667 | } else { | |
1668 | /* KEM mode */ | |
1669 | unsigned char *ct = NULL; | |
1670 | size_t ctlen = 0; | |
1671 | ||
1672 | /* | |
1673 | * This does not update the crypto state. | |
1674 | * | |
1675 | * The generated pms is stored in `s->s3.tmp.pms` to be later used via | |
1676 | * ssl_gensecret(). | |
1677 | */ | |
1678 | if (ssl_encapsulate(s, ckey, &ct, &ctlen, 0) == 0) { | |
1679 | /* SSLfatal() already called */ | |
1680 | return EXT_RETURN_FAIL; | |
1681 | } | |
1682 | ||
1683 | if (ctlen == 0) { | |
c48ffbcc | 1684 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
8b17fbaf NT |
1685 | OPENSSL_free(ct); |
1686 | return EXT_RETURN_FAIL; | |
1687 | } | |
1688 | ||
1689 | if (!WPACKET_sub_memcpy_u16(pkt, ct, ctlen) | |
1690 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1691 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
8b17fbaf NT |
1692 | OPENSSL_free(ct); |
1693 | return EXT_RETURN_FAIL; | |
1694 | } | |
1695 | OPENSSL_free(ct); | |
1696 | ||
1697 | /* | |
1698 | * This causes the crypto state to be updated based on the generated pms | |
1699 | */ | |
1700 | if (ssl_gensecret(s, s->s3.tmp.pms, s->s3.tmp.pmslen) == 0) { | |
1701 | /* SSLfatal() already called */ | |
1702 | return EXT_RETURN_FAIL; | |
1703 | } | |
7da160b0 | 1704 | } |
aa6bd216 | 1705 | s->s3.did_kex = 1; |
b186a592 | 1706 | return EXT_RETURN_SENT; |
1aac20f5 MC |
1707 | #else |
1708 | return EXT_RETURN_FAIL; | |
1709 | #endif | |
7da160b0 MC |
1710 | } |
1711 | ||
43054d3d MC |
1712 | EXT_RETURN tls_construct_stoc_cookie(SSL *s, WPACKET *pkt, unsigned int context, |
1713 | X509 *x, size_t chainidx) | |
1714 | { | |
1aac20f5 | 1715 | #ifndef OPENSSL_NO_TLS1_3 |
43054d3d MC |
1716 | unsigned char *hashval1, *hashval2, *appcookie1, *appcookie2, *cookie; |
1717 | unsigned char *hmac, *hmac2; | |
3fa2812f | 1718 | size_t startlen, ciphlen, totcookielen, hashlen, hmaclen, appcookielen; |
43054d3d MC |
1719 | EVP_MD_CTX *hctx; |
1720 | EVP_PKEY *pkey; | |
1721 | int ret = EXT_RETURN_FAIL; | |
1722 | ||
555cbb32 | 1723 | if ((s->s3.flags & TLS1_FLAGS_STATELESS) == 0) |
43054d3d MC |
1724 | return EXT_RETURN_NOT_SENT; |
1725 | ||
3fa2812f | 1726 | if (s->ctx->gen_stateless_cookie_cb == NULL) { |
c48ffbcc | 1727 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_NO_COOKIE_CALLBACK_SET); |
e440f513 MC |
1728 | return EXT_RETURN_FAIL; |
1729 | } | |
1730 | ||
43054d3d MC |
1731 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_cookie) |
1732 | || !WPACKET_start_sub_packet_u16(pkt) | |
1733 | || !WPACKET_start_sub_packet_u16(pkt) | |
1734 | || !WPACKET_get_total_written(pkt, &startlen) | |
1735 | || !WPACKET_reserve_bytes(pkt, MAX_COOKIE_SIZE, &cookie) | |
1736 | || !WPACKET_put_bytes_u16(pkt, COOKIE_STATE_FORMAT_VERSION) | |
1737 | || !WPACKET_put_bytes_u16(pkt, TLS1_3_VERSION) | |
555cbb32 TS |
1738 | || !WPACKET_put_bytes_u16(pkt, s->s3.group_id) |
1739 | || !s->method->put_cipher_by_char(s->s3.tmp.new_cipher, pkt, | |
43054d3d MC |
1740 | &ciphlen) |
1741 | /* Is there a key_share extension present in this HRR? */ | |
555cbb32 | 1742 | || !WPACKET_put_bytes_u8(pkt, s->s3.peer_tmp == NULL) |
d0debc0a | 1743 | || !WPACKET_put_bytes_u32(pkt, (unsigned int)time(NULL)) |
43054d3d MC |
1744 | || !WPACKET_start_sub_packet_u16(pkt) |
1745 | || !WPACKET_reserve_bytes(pkt, EVP_MAX_MD_SIZE, &hashval1)) { | |
c48ffbcc | 1746 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1747 | return EXT_RETURN_FAIL; |
1748 | } | |
1749 | ||
1750 | /* | |
1751 | * Get the hash of the initial ClientHello. ssl_handshake_hash() operates | |
1752 | * on raw buffers, so we first reserve sufficient bytes (above) and then | |
1753 | * subsequently allocate them (below) | |
1754 | */ | |
1755 | if (!ssl3_digest_cached_records(s, 0) | |
1756 | || !ssl_handshake_hash(s, hashval1, EVP_MAX_MD_SIZE, &hashlen)) { | |
1757 | /* SSLfatal() already called */ | |
1758 | return EXT_RETURN_FAIL; | |
1759 | } | |
1760 | ||
1761 | if (!WPACKET_allocate_bytes(pkt, hashlen, &hashval2) | |
1762 | || !ossl_assert(hashval1 == hashval2) | |
1763 | || !WPACKET_close(pkt) | |
1764 | || !WPACKET_start_sub_packet_u8(pkt) | |
1765 | || !WPACKET_reserve_bytes(pkt, SSL_COOKIE_LENGTH, &appcookie1)) { | |
c48ffbcc | 1766 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1767 | return EXT_RETURN_FAIL; |
1768 | } | |
1769 | ||
1770 | /* Generate the application cookie */ | |
3fa2812f | 1771 | if (s->ctx->gen_stateless_cookie_cb(s, appcookie1, &appcookielen) == 0) { |
c48ffbcc | 1772 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_COOKIE_GEN_CALLBACK_FAILURE); |
43054d3d MC |
1773 | return EXT_RETURN_FAIL; |
1774 | } | |
1775 | ||
1776 | if (!WPACKET_allocate_bytes(pkt, appcookielen, &appcookie2) | |
1777 | || !ossl_assert(appcookie1 == appcookie2) | |
1778 | || !WPACKET_close(pkt) | |
1779 | || !WPACKET_get_total_written(pkt, &totcookielen) | |
1780 | || !WPACKET_reserve_bytes(pkt, SHA256_DIGEST_LENGTH, &hmac)) { | |
c48ffbcc | 1781 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1782 | return EXT_RETURN_FAIL; |
1783 | } | |
1784 | hmaclen = SHA256_DIGEST_LENGTH; | |
1785 | ||
1786 | totcookielen -= startlen; | |
1787 | if (!ossl_assert(totcookielen <= MAX_COOKIE_SIZE - SHA256_DIGEST_LENGTH)) { | |
c48ffbcc | 1788 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1789 | return EXT_RETURN_FAIL; |
1790 | } | |
1791 | ||
1792 | /* HMAC the cookie */ | |
1793 | hctx = EVP_MD_CTX_create(); | |
d8652be0 MC |
1794 | pkey = EVP_PKEY_new_raw_private_key_ex(s->ctx->libctx, "HMAC", |
1795 | s->ctx->propq, | |
1796 | s->session_ctx->ext.cookie_hmac_key, | |
1797 | sizeof(s->session_ctx->ext.cookie_hmac_key)); | |
43054d3d | 1798 | if (hctx == NULL || pkey == NULL) { |
c48ffbcc | 1799 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); |
43054d3d MC |
1800 | goto err; |
1801 | } | |
1802 | ||
d8652be0 | 1803 | if (EVP_DigestSignInit_ex(hctx, NULL, "SHA2-256", s->ctx->libctx, |
d38b6ae9 | 1804 | s->ctx->propq, pkey, NULL) <= 0 |
43054d3d MC |
1805 | || EVP_DigestSign(hctx, hmac, &hmaclen, cookie, |
1806 | totcookielen) <= 0) { | |
c48ffbcc | 1807 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1808 | goto err; |
1809 | } | |
1810 | ||
1811 | if (!ossl_assert(totcookielen + hmaclen <= MAX_COOKIE_SIZE)) { | |
c48ffbcc | 1812 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1813 | goto err; |
1814 | } | |
1815 | ||
1816 | if (!WPACKET_allocate_bytes(pkt, hmaclen, &hmac2) | |
1817 | || !ossl_assert(hmac == hmac2) | |
1818 | || !ossl_assert(cookie == hmac - totcookielen) | |
1819 | || !WPACKET_close(pkt) | |
1820 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1821 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
43054d3d MC |
1822 | goto err; |
1823 | } | |
1824 | ||
1825 | ret = EXT_RETURN_SENT; | |
1826 | ||
1827 | err: | |
1828 | EVP_MD_CTX_free(hctx); | |
1829 | EVP_PKEY_free(pkey); | |
1830 | return ret; | |
1aac20f5 MC |
1831 | #else |
1832 | return EXT_RETURN_FAIL; | |
1833 | #endif | |
43054d3d MC |
1834 | } |
1835 | ||
b186a592 MC |
1836 | EXT_RETURN tls_construct_stoc_cryptopro_bug(SSL *s, WPACKET *pkt, |
1837 | unsigned int context, X509 *x, | |
f63a17d6 | 1838 | size_t chainidx) |
7da160b0 MC |
1839 | { |
1840 | const unsigned char cryptopro_ext[36] = { | |
1841 | 0xfd, 0xe8, /* 65000 */ | |
1842 | 0x00, 0x20, /* 32 bytes length */ | |
1843 | 0x30, 0x1e, 0x30, 0x08, 0x06, 0x06, 0x2a, 0x85, | |
1844 | 0x03, 0x02, 0x02, 0x09, 0x30, 0x08, 0x06, 0x06, | |
1845 | 0x2a, 0x85, 0x03, 0x02, 0x02, 0x16, 0x30, 0x08, | |
1846 | 0x06, 0x06, 0x2a, 0x85, 0x03, 0x02, 0x02, 0x17 | |
1847 | }; | |
1848 | ||
555cbb32 TS |
1849 | if (((s->s3.tmp.new_cipher->id & 0xFFFF) != 0x80 |
1850 | && (s->s3.tmp.new_cipher->id & 0xFFFF) != 0x81) | |
7da160b0 | 1851 | || (SSL_get_options(s) & SSL_OP_CRYPTOPRO_TLSEXT_BUG) == 0) |
b186a592 | 1852 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1853 | |
1854 | if (!WPACKET_memcpy(pkt, cryptopro_ext, sizeof(cryptopro_ext))) { | |
c48ffbcc | 1855 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1856 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1857 | } |
1858 | ||
b186a592 | 1859 | return EXT_RETURN_SENT; |
7da160b0 | 1860 | } |
0247086d | 1861 | |
b186a592 MC |
1862 | EXT_RETURN tls_construct_stoc_early_data(SSL *s, WPACKET *pkt, |
1863 | unsigned int context, X509 *x, | |
f63a17d6 | 1864 | size_t chainidx) |
38df5a45 | 1865 | { |
fe874d27 | 1866 | if (context == SSL_EXT_TLS1_3_NEW_SESSION_TICKET) { |
6594189f | 1867 | if (s->max_early_data == 0) |
b186a592 | 1868 | return EXT_RETURN_NOT_SENT; |
6594189f MC |
1869 | |
1870 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) | |
1871 | || !WPACKET_start_sub_packet_u16(pkt) | |
1872 | || !WPACKET_put_bytes_u32(pkt, s->max_early_data) | |
1873 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1874 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1875 | return EXT_RETURN_FAIL; |
6594189f MC |
1876 | } |
1877 | ||
b186a592 | 1878 | return EXT_RETURN_SENT; |
6594189f MC |
1879 | } |
1880 | ||
38df5a45 | 1881 | if (s->ext.early_data != SSL_EARLY_DATA_ACCEPTED) |
b186a592 | 1882 | return EXT_RETURN_NOT_SENT; |
38df5a45 MC |
1883 | |
1884 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) | |
1885 | || !WPACKET_start_sub_packet_u16(pkt) | |
1886 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1887 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1888 | return EXT_RETURN_FAIL; |
38df5a45 MC |
1889 | } |
1890 | ||
b186a592 | 1891 | return EXT_RETURN_SENT; |
38df5a45 MC |
1892 | } |
1893 | ||
b186a592 | 1894 | EXT_RETURN tls_construct_stoc_psk(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 1895 | X509 *x, size_t chainidx) |
0247086d MC |
1896 | { |
1897 | if (!s->hit) | |
b186a592 | 1898 | return EXT_RETURN_NOT_SENT; |
0247086d MC |
1899 | |
1900 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk) | |
1901 | || !WPACKET_start_sub_packet_u16(pkt) | |
c96ce52c | 1902 | || !WPACKET_put_bytes_u16(pkt, s->ext.tick_identity) |
0247086d | 1903 | || !WPACKET_close(pkt)) { |
c48ffbcc | 1904 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1905 | return EXT_RETURN_FAIL; |
0247086d MC |
1906 | } |
1907 | ||
b186a592 | 1908 | return EXT_RETURN_SENT; |
0247086d | 1909 | } |