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25670f3e | 1 | /* |
6738bf14 | 2 | * Copyright 2016-2018 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> | |
11 | #include "../ssl_locl.h" | |
12 | #include "statem_locl.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)) { | |
f63a17d6 MC |
50 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_RENEGOTIATE, |
51 | 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) { |
f63a17d6 MC |
57 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_PARSE_CTOS_RENEGOTIATE, |
58 | SSL_R_RENEGOTIATION_MISMATCH); | |
25670f3e MC |
59 | return 0; |
60 | } | |
61 | ||
555cbb32 TS |
62 | if (memcmp(data, s->s3.previous_client_finished, |
63 | s->s3.previous_client_finished_len)) { | |
f63a17d6 MC |
64 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_PARSE_CTOS_RENEGOTIATE, |
65 | SSL_R_RENEGOTIATION_MISMATCH); | |
25670f3e MC |
66 | return 0; |
67 | } | |
68 | ||
555cbb32 | 69 | s->s3.send_connection_binding = 1; |
25670f3e MC |
70 | |
71 | return 1; | |
72 | } | |
73 | ||
1266eefd MC |
74 | /*- |
75 | * The servername extension is treated as follows: | |
76 | * | |
77 | * - Only the hostname type is supported with a maximum length of 255. | |
78 | * - The servername is rejected if too long or if it contains zeros, | |
79 | * in which case an fatal alert is generated. | |
80 | * - The servername field is maintained together with the session cache. | |
81 | * - When a session is resumed, the servername call back invoked in order | |
82 | * to allow the application to position itself to the right context. | |
83 | * - The servername is acknowledged if it is new for a session or when | |
84 | * it is identical to a previously used for the same session. | |
85 | * Applications can control the behaviour. They can at any time | |
86 | * set a 'desirable' servername for a new SSL object. This can be the | |
87 | * case for example with HTTPS when a Host: header field is received and | |
88 | * a renegotiation is requested. In this case, a possible servername | |
89 | * presented in the new client hello is only acknowledged if it matches | |
90 | * the value of the Host: field. | |
91 | * - Applications must use SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION | |
92 | * if they provide for changing an explicit servername context for the | |
93 | * session, i.e. when the session has been established with a servername | |
94 | * extension. | |
95 | * - On session reconnect, the servername extension may be absent. | |
96 | */ | |
61138358 | 97 | int tls_parse_ctos_server_name(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 98 | X509 *x, size_t chainidx) |
25670f3e MC |
99 | { |
100 | unsigned int servname_type; | |
101 | PACKET sni, hostname; | |
102 | ||
25670f3e MC |
103 | if (!PACKET_as_length_prefixed_2(pkt, &sni) |
104 | /* ServerNameList must be at least 1 byte long. */ | |
105 | || PACKET_remaining(&sni) == 0) { | |
f63a17d6 MC |
106 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_SERVER_NAME, |
107 | SSL_R_BAD_EXTENSION); | |
25670f3e MC |
108 | return 0; |
109 | } | |
110 | ||
111 | /* | |
44e69951 F |
112 | * Although the intent was for server_name to be extensible, RFC 4366 |
113 | * was not clear about it; and so OpenSSL among other implementations, | |
114 | * always and only allows a 'host_name' name types. | |
25670f3e MC |
115 | * RFC 6066 corrected the mistake but adding new name types |
116 | * is nevertheless no longer feasible, so act as if no other | |
117 | * SNI types can exist, to simplify parsing. | |
118 | * | |
119 | * Also note that the RFC permits only one SNI value per type, | |
120 | * i.e., we can only have a single hostname. | |
121 | */ | |
122 | if (!PACKET_get_1(&sni, &servname_type) | |
123 | || servname_type != TLSEXT_NAMETYPE_host_name | |
124 | || !PACKET_as_length_prefixed_2(&sni, &hostname)) { | |
f63a17d6 MC |
125 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_SERVER_NAME, |
126 | SSL_R_BAD_EXTENSION); | |
25670f3e MC |
127 | return 0; |
128 | } | |
129 | ||
1c4aa31d | 130 | if (!s->hit || SSL_IS_TLS13(s)) { |
25670f3e | 131 | if (PACKET_remaining(&hostname) > TLSEXT_MAXLEN_host_name) { |
f63a17d6 MC |
132 | SSLfatal(s, SSL_AD_UNRECOGNIZED_NAME, |
133 | SSL_F_TLS_PARSE_CTOS_SERVER_NAME, | |
134 | SSL_R_BAD_EXTENSION); | |
25670f3e MC |
135 | return 0; |
136 | } | |
137 | ||
138 | if (PACKET_contains_zero_byte(&hostname)) { | |
f63a17d6 MC |
139 | SSLfatal(s, SSL_AD_UNRECOGNIZED_NAME, |
140 | SSL_F_TLS_PARSE_CTOS_SERVER_NAME, | |
141 | SSL_R_BAD_EXTENSION); | |
25670f3e MC |
142 | return 0; |
143 | } | |
144 | ||
1c4aa31d BK |
145 | /* |
146 | * Store the requested SNI in the SSL as temporary storage. | |
147 | * If we accept it, it will get stored in the SSL_SESSION as well. | |
148 | */ | |
149 | OPENSSL_free(s->ext.hostname); | |
150 | s->ext.hostname = NULL; | |
151 | if (!PACKET_strndup(&hostname, &s->ext.hostname)) { | |
f63a17d6 MC |
152 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_SERVER_NAME, |
153 | ERR_R_INTERNAL_ERROR); | |
25670f3e MC |
154 | return 0; |
155 | } | |
156 | ||
157 | s->servername_done = 1; | |
1c4aa31d BK |
158 | } |
159 | if (s->hit) { | |
25670f3e MC |
160 | /* |
161 | * TODO(openssl-team): if the SNI doesn't match, we MUST | |
162 | * fall back to a full handshake. | |
163 | */ | |
1c4aa31d | 164 | s->servername_done = (s->session->ext.hostname != NULL) |
aff8c126 RS |
165 | && PACKET_equal(&hostname, s->session->ext.hostname, |
166 | strlen(s->session->ext.hostname)); | |
630369d9 MC |
167 | |
168 | if (!s->servername_done && s->session->ext.hostname != NULL) | |
169 | s->ext.early_data_ok = 0; | |
25670f3e MC |
170 | } |
171 | ||
172 | return 1; | |
173 | } | |
174 | ||
cf72c757 | 175 | int tls_parse_ctos_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 176 | X509 *x, size_t chainidx) |
cf72c757 F |
177 | { |
178 | unsigned int value; | |
179 | ||
180 | if (PACKET_remaining(pkt) != 1 || !PACKET_get_1(pkt, &value)) { | |
f63a17d6 MC |
181 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_MAXFRAGMENTLEN, |
182 | SSL_R_BAD_EXTENSION); | |
cf72c757 F |
183 | return 0; |
184 | } | |
185 | ||
186 | /* Received |value| should be a valid max-fragment-length code. */ | |
187 | if (!IS_MAX_FRAGMENT_LENGTH_EXT_VALID(value)) { | |
f63a17d6 MC |
188 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
189 | SSL_F_TLS_PARSE_CTOS_MAXFRAGMENTLEN, | |
190 | SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); | |
cf72c757 F |
191 | return 0; |
192 | } | |
193 | ||
194 | /* | |
195 | * RFC 6066: The negotiated length applies for the duration of the session | |
196 | * including session resumptions. | |
197 | * We should receive the same code as in resumed session ! | |
198 | */ | |
199 | if (s->hit && s->session->ext.max_fragment_len_mode != value) { | |
f63a17d6 MC |
200 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
201 | SSL_F_TLS_PARSE_CTOS_MAXFRAGMENTLEN, | |
202 | SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); | |
cf72c757 F |
203 | return 0; |
204 | } | |
205 | ||
206 | /* | |
207 | * Store it in session, so it'll become binding for us | |
208 | * and we'll include it in a next Server Hello. | |
209 | */ | |
210 | s->session->ext.max_fragment_len_mode = value; | |
211 | return 1; | |
212 | } | |
213 | ||
25670f3e | 214 | #ifndef OPENSSL_NO_SRP |
61138358 | 215 | int tls_parse_ctos_srp(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 216 | size_t chainidx) |
25670f3e MC |
217 | { |
218 | PACKET srp_I; | |
219 | ||
220 | if (!PACKET_as_length_prefixed_1(pkt, &srp_I) | |
221 | || PACKET_contains_zero_byte(&srp_I)) { | |
f63a17d6 MC |
222 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
223 | SSL_F_TLS_PARSE_CTOS_SRP, | |
224 | SSL_R_BAD_EXTENSION); | |
25670f3e MC |
225 | return 0; |
226 | } | |
227 | ||
228 | /* | |
229 | * TODO(openssl-team): currently, we re-authenticate the user | |
230 | * upon resumption. Instead, we MUST ignore the login. | |
231 | */ | |
232 | if (!PACKET_strndup(&srp_I, &s->srp_ctx.login)) { | |
f63a17d6 MC |
233 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_SRP, |
234 | ERR_R_INTERNAL_ERROR); | |
25670f3e MC |
235 | return 0; |
236 | } | |
237 | ||
238 | return 1; | |
239 | } | |
240 | #endif | |
241 | ||
242 | #ifndef OPENSSL_NO_EC | |
61138358 | 243 | int tls_parse_ctos_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 244 | X509 *x, size_t chainidx) |
25670f3e MC |
245 | { |
246 | PACKET ec_point_format_list; | |
247 | ||
248 | if (!PACKET_as_length_prefixed_1(pkt, &ec_point_format_list) | |
249 | || PACKET_remaining(&ec_point_format_list) == 0) { | |
f63a17d6 MC |
250 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_EC_PT_FORMATS, |
251 | SSL_R_BAD_EXTENSION); | |
25670f3e MC |
252 | return 0; |
253 | } | |
254 | ||
255 | if (!s->hit) { | |
256 | if (!PACKET_memdup(&ec_point_format_list, | |
aff8c126 RS |
257 | &s->session->ext.ecpointformats, |
258 | &s->session->ext.ecpointformats_len)) { | |
f63a17d6 MC |
259 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
260 | SSL_F_TLS_PARSE_CTOS_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR); | |
25670f3e MC |
261 | return 0; |
262 | } | |
263 | } | |
264 | ||
265 | return 1; | |
266 | } | |
267 | #endif /* OPENSSL_NO_EC */ | |
268 | ||
61138358 | 269 | int tls_parse_ctos_session_ticket(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 270 | X509 *x, size_t chainidx) |
25670f3e | 271 | { |
aff8c126 RS |
272 | if (s->ext.session_ticket_cb && |
273 | !s->ext.session_ticket_cb(s, PACKET_data(pkt), | |
274 | PACKET_remaining(pkt), | |
275 | s->ext.session_ticket_cb_arg)) { | |
f63a17d6 MC |
276 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
277 | SSL_F_TLS_PARSE_CTOS_SESSION_TICKET, ERR_R_INTERNAL_ERROR); | |
25670f3e MC |
278 | return 0; |
279 | } | |
280 | ||
281 | return 1; | |
282 | } | |
283 | ||
c589c34e BK |
284 | int tls_parse_ctos_sig_algs_cert(SSL *s, PACKET *pkt, unsigned int context, |
285 | X509 *x, size_t chainidx) | |
286 | { | |
287 | PACKET supported_sig_algs; | |
288 | ||
289 | if (!PACKET_as_length_prefixed_2(pkt, &supported_sig_algs) | |
290 | || PACKET_remaining(&supported_sig_algs) == 0) { | |
291 | SSLfatal(s, SSL_AD_DECODE_ERROR, | |
292 | SSL_F_TLS_PARSE_CTOS_SIG_ALGS_CERT, SSL_R_BAD_EXTENSION); | |
293 | return 0; | |
294 | } | |
295 | ||
296 | if (!s->hit && !tls1_save_sigalgs(s, &supported_sig_algs, 1)) { | |
297 | SSLfatal(s, SSL_AD_DECODE_ERROR, | |
298 | SSL_F_TLS_PARSE_CTOS_SIG_ALGS_CERT, SSL_R_BAD_EXTENSION); | |
299 | return 0; | |
300 | } | |
301 | ||
302 | return 1; | |
303 | } | |
304 | ||
61138358 | 305 | int tls_parse_ctos_sig_algs(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 306 | size_t chainidx) |
25670f3e MC |
307 | { |
308 | PACKET supported_sig_algs; | |
309 | ||
310 | if (!PACKET_as_length_prefixed_2(pkt, &supported_sig_algs) | |
25670f3e | 311 | || PACKET_remaining(&supported_sig_algs) == 0) { |
f63a17d6 MC |
312 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
313 | SSL_F_TLS_PARSE_CTOS_SIG_ALGS, SSL_R_BAD_EXTENSION); | |
25670f3e MC |
314 | return 0; |
315 | } | |
316 | ||
c589c34e | 317 | if (!s->hit && !tls1_save_sigalgs(s, &supported_sig_algs, 0)) { |
f63a17d6 MC |
318 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
319 | SSL_F_TLS_PARSE_CTOS_SIG_ALGS, SSL_R_BAD_EXTENSION); | |
25670f3e MC |
320 | return 0; |
321 | } | |
322 | ||
323 | return 1; | |
324 | } | |
325 | ||
ab83e314 | 326 | #ifndef OPENSSL_NO_OCSP |
61138358 | 327 | int tls_parse_ctos_status_request(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 328 | X509 *x, size_t chainidx) |
25670f3e | 329 | { |
1266eefd MC |
330 | PACKET responder_id_list, exts; |
331 | ||
ded4a83d MC |
332 | /* We ignore this in a resumption handshake */ |
333 | if (s->hit) | |
334 | return 1; | |
335 | ||
e96e0f8e MC |
336 | /* Not defined if we get one of these in a client Certificate */ |
337 | if (x != NULL) | |
338 | return 1; | |
339 | ||
aff8c126 | 340 | if (!PACKET_get_1(pkt, (unsigned int *)&s->ext.status_type)) { |
f63a17d6 MC |
341 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
342 | SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, SSL_R_BAD_EXTENSION); | |
25670f3e MC |
343 | return 0; |
344 | } | |
ab83e314 | 345 | |
aff8c126 | 346 | if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) { |
25670f3e | 347 | /* |
1266eefd | 348 | * We don't know what to do with any other type so ignore it. |
25670f3e | 349 | */ |
aff8c126 | 350 | s->ext.status_type = TLSEXT_STATUSTYPE_nothing; |
1266eefd MC |
351 | return 1; |
352 | } | |
25670f3e | 353 | |
1266eefd | 354 | if (!PACKET_get_length_prefixed_2 (pkt, &responder_id_list)) { |
f63a17d6 MC |
355 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
356 | SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, SSL_R_BAD_EXTENSION); | |
1266eefd MC |
357 | return 0; |
358 | } | |
25670f3e | 359 | |
1266eefd MC |
360 | /* |
361 | * We remove any OCSP_RESPIDs from a previous handshake | |
362 | * to prevent unbounded memory growth - CVE-2016-6304 | |
363 | */ | |
aff8c126 | 364 | sk_OCSP_RESPID_pop_free(s->ext.ocsp.ids, OCSP_RESPID_free); |
1266eefd | 365 | if (PACKET_remaining(&responder_id_list) > 0) { |
aff8c126 RS |
366 | s->ext.ocsp.ids = sk_OCSP_RESPID_new_null(); |
367 | if (s->ext.ocsp.ids == NULL) { | |
f63a17d6 MC |
368 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
369 | SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, ERR_R_MALLOC_FAILURE); | |
1266eefd MC |
370 | return 0; |
371 | } | |
372 | } else { | |
aff8c126 | 373 | s->ext.ocsp.ids = NULL; |
1266eefd | 374 | } |
25670f3e | 375 | |
1266eefd MC |
376 | while (PACKET_remaining(&responder_id_list) > 0) { |
377 | OCSP_RESPID *id; | |
378 | PACKET responder_id; | |
379 | const unsigned char *id_data; | |
25670f3e | 380 | |
1266eefd MC |
381 | if (!PACKET_get_length_prefixed_2(&responder_id_list, &responder_id) |
382 | || PACKET_remaining(&responder_id) == 0) { | |
f63a17d6 MC |
383 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
384 | SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, SSL_R_BAD_EXTENSION); | |
1266eefd MC |
385 | return 0; |
386 | } | |
25670f3e | 387 | |
1266eefd MC |
388 | id_data = PACKET_data(&responder_id); |
389 | /* TODO(size_t): Convert d2i_* to size_t */ | |
390 | id = d2i_OCSP_RESPID(NULL, &id_data, | |
391 | (int)PACKET_remaining(&responder_id)); | |
392 | if (id == NULL) { | |
f63a17d6 MC |
393 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
394 | SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, SSL_R_BAD_EXTENSION); | |
1266eefd | 395 | return 0; |
25670f3e MC |
396 | } |
397 | ||
1266eefd MC |
398 | if (id_data != PACKET_end(&responder_id)) { |
399 | OCSP_RESPID_free(id); | |
f63a17d6 MC |
400 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
401 | SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, SSL_R_BAD_EXTENSION); | |
402 | ||
25670f3e MC |
403 | return 0; |
404 | } | |
405 | ||
aff8c126 | 406 | if (!sk_OCSP_RESPID_push(s->ext.ocsp.ids, id)) { |
1266eefd | 407 | OCSP_RESPID_free(id); |
f63a17d6 MC |
408 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
409 | SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); | |
410 | ||
1266eefd MC |
411 | return 0; |
412 | } | |
413 | } | |
414 | ||
415 | /* Read in request_extensions */ | |
416 | if (!PACKET_as_length_prefixed_2(pkt, &exts)) { | |
f63a17d6 MC |
417 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
418 | SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, SSL_R_BAD_EXTENSION); | |
1266eefd MC |
419 | return 0; |
420 | } | |
421 | ||
422 | if (PACKET_remaining(&exts) > 0) { | |
423 | const unsigned char *ext_data = PACKET_data(&exts); | |
424 | ||
aff8c126 | 425 | sk_X509_EXTENSION_pop_free(s->ext.ocsp.exts, |
1266eefd | 426 | X509_EXTENSION_free); |
aff8c126 | 427 | s->ext.ocsp.exts = |
1266eefd | 428 | d2i_X509_EXTENSIONS(NULL, &ext_data, (int)PACKET_remaining(&exts)); |
aff8c126 | 429 | if (s->ext.ocsp.exts == NULL || ext_data != PACKET_end(&exts)) { |
f63a17d6 MC |
430 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
431 | SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, SSL_R_BAD_EXTENSION); | |
1266eefd | 432 | return 0; |
25670f3e | 433 | } |
25670f3e MC |
434 | } |
435 | ||
436 | return 1; | |
437 | } | |
ab83e314 | 438 | #endif |
25670f3e MC |
439 | |
440 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
61138358 | 441 | int tls_parse_ctos_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 442 | size_t chainidx) |
25670f3e | 443 | { |
1266eefd MC |
444 | /* |
445 | * We shouldn't accept this extension on a | |
446 | * renegotiation. | |
1266eefd | 447 | */ |
c7f47786 | 448 | if (SSL_IS_FIRST_HANDSHAKE(s)) |
555cbb32 | 449 | s->s3.npn_seen = 1; |
25670f3e MC |
450 | |
451 | return 1; | |
452 | } | |
453 | #endif | |
454 | ||
455 | /* | |
1266eefd | 456 | * Save the ALPN extension in a ClientHello.|pkt| holds the contents of the ALPN |
29bfd5b7 | 457 | * extension, not including type and length. Returns: 1 on success, 0 on error. |
25670f3e | 458 | */ |
61138358 | 459 | int tls_parse_ctos_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 460 | size_t chainidx) |
25670f3e MC |
461 | { |
462 | PACKET protocol_list, save_protocol_list, protocol; | |
463 | ||
c7f47786 | 464 | if (!SSL_IS_FIRST_HANDSHAKE(s)) |
25670f3e MC |
465 | return 1; |
466 | ||
467 | if (!PACKET_as_length_prefixed_2(pkt, &protocol_list) | |
468 | || PACKET_remaining(&protocol_list) < 2) { | |
f63a17d6 MC |
469 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_ALPN, |
470 | SSL_R_BAD_EXTENSION); | |
25670f3e MC |
471 | return 0; |
472 | } | |
473 | ||
474 | save_protocol_list = protocol_list; | |
475 | do { | |
476 | /* Protocol names can't be empty. */ | |
477 | if (!PACKET_get_length_prefixed_1(&protocol_list, &protocol) | |
478 | || PACKET_remaining(&protocol) == 0) { | |
f63a17d6 MC |
479 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_ALPN, |
480 | SSL_R_BAD_EXTENSION); | |
25670f3e MC |
481 | return 0; |
482 | } | |
483 | } while (PACKET_remaining(&protocol_list) != 0); | |
484 | ||
555cbb32 TS |
485 | OPENSSL_free(s->s3.alpn_proposed); |
486 | s->s3.alpn_proposed = NULL; | |
487 | s->s3.alpn_proposed_len = 0; | |
25670f3e | 488 | if (!PACKET_memdup(&save_protocol_list, |
555cbb32 | 489 | &s->s3.alpn_proposed, &s->s3.alpn_proposed_len)) { |
f63a17d6 MC |
490 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_ALPN, |
491 | ERR_R_INTERNAL_ERROR); | |
25670f3e MC |
492 | return 0; |
493 | } | |
494 | ||
495 | return 1; | |
496 | } | |
497 | ||
498 | #ifndef OPENSSL_NO_SRTP | |
61138358 | 499 | int tls_parse_ctos_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 500 | size_t chainidx) |
25670f3e | 501 | { |
25670f3e MC |
502 | STACK_OF(SRTP_PROTECTION_PROFILE) *srvr; |
503 | unsigned int ct, mki_len, id; | |
504 | int i, srtp_pref; | |
505 | PACKET subpkt; | |
506 | ||
507 | /* Ignore this if we have no SRTP profiles */ | |
508 | if (SSL_get_srtp_profiles(s) == NULL) | |
509 | return 1; | |
510 | ||
511 | /* Pull off the length of the cipher suite list and check it is even */ | |
1266eefd MC |
512 | if (!PACKET_get_net_2(pkt, &ct) || (ct & 1) != 0 |
513 | || !PACKET_get_sub_packet(pkt, &subpkt, ct)) { | |
f63a17d6 | 514 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_USE_SRTP, |
25670f3e | 515 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
25670f3e MC |
516 | return 0; |
517 | } | |
518 | ||
519 | srvr = SSL_get_srtp_profiles(s); | |
520 | s->srtp_profile = NULL; | |
521 | /* Search all profiles for a match initially */ | |
522 | srtp_pref = sk_SRTP_PROTECTION_PROFILE_num(srvr); | |
523 | ||
524 | while (PACKET_remaining(&subpkt)) { | |
525 | if (!PACKET_get_net_2(&subpkt, &id)) { | |
f63a17d6 MC |
526 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_USE_SRTP, |
527 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); | |
25670f3e MC |
528 | return 0; |
529 | } | |
530 | ||
531 | /* | |
532 | * Only look for match in profiles of higher preference than | |
533 | * current match. | |
534 | * If no profiles have been have been configured then this | |
535 | * does nothing. | |
536 | */ | |
537 | for (i = 0; i < srtp_pref; i++) { | |
d270de32 | 538 | SRTP_PROTECTION_PROFILE *sprof = |
1266eefd MC |
539 | sk_SRTP_PROTECTION_PROFILE_value(srvr, i); |
540 | ||
25670f3e MC |
541 | if (sprof->id == id) { |
542 | s->srtp_profile = sprof; | |
543 | srtp_pref = i; | |
544 | break; | |
545 | } | |
546 | } | |
547 | } | |
548 | ||
1266eefd | 549 | /* Now extract the MKI value as a sanity check, but discard it for now */ |
25670f3e | 550 | if (!PACKET_get_1(pkt, &mki_len)) { |
f63a17d6 MC |
551 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_USE_SRTP, |
552 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); | |
25670f3e MC |
553 | return 0; |
554 | } | |
555 | ||
556 | if (!PACKET_forward(pkt, mki_len) | |
557 | || PACKET_remaining(pkt)) { | |
f63a17d6 MC |
558 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_USE_SRTP, |
559 | SSL_R_BAD_SRTP_MKI_VALUE); | |
25670f3e MC |
560 | return 0; |
561 | } | |
562 | ||
563 | return 1; | |
564 | } | |
565 | #endif | |
566 | ||
61138358 | 567 | int tls_parse_ctos_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 568 | size_t chainidx) |
25670f3e MC |
569 | { |
570 | if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC)) | |
28a31a0a | 571 | s->ext.use_etm = 1; |
25670f3e MC |
572 | |
573 | return 1; | |
574 | } | |
575 | ||
b2f7e8c0 MC |
576 | /* |
577 | * Process a psk_kex_modes extension received in the ClientHello. |pkt| contains | |
578 | * the raw PACKET data for the extension. Returns 1 on success or 0 on failure. | |
b2f7e8c0 | 579 | */ |
61138358 | 580 | int tls_parse_ctos_psk_kex_modes(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 581 | X509 *x, size_t chainidx) |
b2f7e8c0 MC |
582 | { |
583 | #ifndef OPENSSL_NO_TLS1_3 | |
584 | PACKET psk_kex_modes; | |
585 | unsigned int mode; | |
586 | ||
587 | if (!PACKET_as_length_prefixed_1(pkt, &psk_kex_modes) | |
588 | || PACKET_remaining(&psk_kex_modes) == 0) { | |
f63a17d6 MC |
589 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_PSK_KEX_MODES, |
590 | SSL_R_BAD_EXTENSION); | |
b2f7e8c0 MC |
591 | return 0; |
592 | } | |
593 | ||
594 | while (PACKET_get_1(&psk_kex_modes, &mode)) { | |
595 | if (mode == TLSEXT_KEX_MODE_KE_DHE) | |
596 | s->ext.psk_kex_mode |= TLSEXT_KEX_MODE_FLAG_KE_DHE; | |
e3c0d76b MC |
597 | else if (mode == TLSEXT_KEX_MODE_KE |
598 | && (s->options & SSL_OP_ALLOW_NO_DHE_KEX) != 0) | |
b2f7e8c0 MC |
599 | s->ext.psk_kex_mode |= TLSEXT_KEX_MODE_FLAG_KE; |
600 | } | |
601 | #endif | |
602 | ||
603 | return 1; | |
604 | } | |
605 | ||
25670f3e MC |
606 | /* |
607 | * Process a key_share extension received in the ClientHello. |pkt| contains | |
608 | * the raw PACKET data for the extension. Returns 1 on success or 0 on failure. | |
25670f3e | 609 | */ |
61138358 | 610 | int tls_parse_ctos_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 611 | size_t chainidx) |
25670f3e | 612 | { |
3cf96e88 | 613 | #ifndef OPENSSL_NO_TLS1_3 |
25670f3e MC |
614 | unsigned int group_id; |
615 | PACKET key_share_list, encoded_pt; | |
f48d826e DSH |
616 | const uint16_t *clntgroups, *srvrgroups; |
617 | size_t clnt_num_groups, srvr_num_groups; | |
43b95d73 | 618 | int found = 0; |
25670f3e | 619 | |
f4bbb37c | 620 | if (s->hit && (s->ext.psk_kex_mode & TLSEXT_KEX_MODE_FLAG_KE_DHE) == 0) |
25670f3e MC |
621 | return 1; |
622 | ||
623 | /* Sanity check */ | |
555cbb32 | 624 | if (s->s3.peer_tmp != NULL) { |
f63a17d6 MC |
625 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_KEY_SHARE, |
626 | ERR_R_INTERNAL_ERROR); | |
25670f3e MC |
627 | return 0; |
628 | } | |
629 | ||
630 | if (!PACKET_as_length_prefixed_2(pkt, &key_share_list)) { | |
f63a17d6 MC |
631 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_KEY_SHARE, |
632 | SSL_R_LENGTH_MISMATCH); | |
25670f3e MC |
633 | return 0; |
634 | } | |
635 | ||
f48d826e DSH |
636 | /* Get our list of supported groups */ |
637 | tls1_get_supported_groups(s, &srvrgroups, &srvr_num_groups); | |
638 | /* Get the clients list of supported groups. */ | |
639 | tls1_get_peer_groups(s, &clntgroups, &clnt_num_groups); | |
640 | if (clnt_num_groups == 0) { | |
b6fdc12d MC |
641 | /* |
642 | * This can only happen if the supported_groups extension was not sent, | |
643 | * because we verify that the length is non-zero when we process that | |
644 | * extension. | |
645 | */ | |
f63a17d6 MC |
646 | SSLfatal(s, SSL_AD_MISSING_EXTENSION, SSL_F_TLS_PARSE_CTOS_KEY_SHARE, |
647 | SSL_R_MISSING_SUPPORTED_GROUPS_EXTENSION); | |
b6fdc12d MC |
648 | return 0; |
649 | } | |
25670f3e | 650 | |
555cbb32 | 651 | if (s->s3.group_id != 0 && PACKET_remaining(&key_share_list) == 0) { |
43054d3d MC |
652 | /* |
653 | * If we set a group_id already, then we must have sent an HRR | |
654 | * requesting a new key_share. If we haven't got one then that is an | |
655 | * error | |
656 | */ | |
657 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_CTOS_KEY_SHARE, | |
658 | SSL_R_BAD_KEY_SHARE); | |
659 | return 0; | |
660 | } | |
661 | ||
25670f3e MC |
662 | while (PACKET_remaining(&key_share_list) > 0) { |
663 | if (!PACKET_get_net_2(&key_share_list, &group_id) | |
664 | || !PACKET_get_length_prefixed_2(&key_share_list, &encoded_pt) | |
665 | || PACKET_remaining(&encoded_pt) == 0) { | |
f63a17d6 MC |
666 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_KEY_SHARE, |
667 | SSL_R_LENGTH_MISMATCH); | |
25670f3e MC |
668 | return 0; |
669 | } | |
670 | ||
671 | /* | |
672 | * If we already found a suitable key_share we loop through the | |
673 | * rest to verify the structure, but don't process them. | |
674 | */ | |
675 | if (found) | |
676 | continue; | |
677 | ||
43054d3d MC |
678 | /* |
679 | * If we sent an HRR then the key_share sent back MUST be for the group | |
680 | * we requested, and must be the only key_share sent. | |
681 | */ | |
555cbb32 TS |
682 | if (s->s3.group_id != 0 |
683 | && (group_id != s->s3.group_id | |
43054d3d MC |
684 | || PACKET_remaining(&key_share_list) != 0)) { |
685 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, | |
686 | SSL_F_TLS_PARSE_CTOS_KEY_SHARE, SSL_R_BAD_KEY_SHARE); | |
687 | return 0; | |
688 | } | |
689 | ||
25670f3e | 690 | /* Check if this share is in supported_groups sent from client */ |
f48d826e | 691 | if (!check_in_list(s, group_id, clntgroups, clnt_num_groups, 0)) { |
f63a17d6 MC |
692 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
693 | SSL_F_TLS_PARSE_CTOS_KEY_SHARE, SSL_R_BAD_KEY_SHARE); | |
25670f3e MC |
694 | return 0; |
695 | } | |
696 | ||
697 | /* Check if this share is for a group we can use */ | |
f48d826e | 698 | if (!check_in_list(s, group_id, srvrgroups, srvr_num_groups, 1)) { |
25670f3e MC |
699 | /* Share not suitable */ |
700 | continue; | |
701 | } | |
702 | ||
555cbb32 | 703 | if ((s->s3.peer_tmp = ssl_generate_param_group(group_id)) == NULL) { |
f63a17d6 | 704 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_KEY_SHARE, |
25670f3e MC |
705 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
706 | return 0; | |
707 | } | |
708 | ||
555cbb32 | 709 | s->s3.group_id = group_id; |
25670f3e | 710 | |
555cbb32 | 711 | if (!EVP_PKEY_set1_tls_encodedpoint(s->s3.peer_tmp, |
25670f3e MC |
712 | PACKET_data(&encoded_pt), |
713 | PACKET_remaining(&encoded_pt))) { | |
f63a17d6 MC |
714 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
715 | SSL_F_TLS_PARSE_CTOS_KEY_SHARE, SSL_R_BAD_ECPOINT); | |
25670f3e MC |
716 | return 0; |
717 | } | |
718 | ||
719 | found = 1; | |
720 | } | |
3cf96e88 | 721 | #endif |
25670f3e MC |
722 | |
723 | return 1; | |
724 | } | |
725 | ||
43054d3d MC |
726 | int tls_parse_ctos_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
727 | size_t chainidx) | |
728 | { | |
1aac20f5 | 729 | #ifndef OPENSSL_NO_TLS1_3 |
dd77962e | 730 | unsigned int format, version, key_share, group_id; |
43054d3d MC |
731 | EVP_MD_CTX *hctx; |
732 | EVP_PKEY *pkey; | |
733 | PACKET cookie, raw, chhash, appcookie; | |
734 | WPACKET hrrpkt; | |
735 | const unsigned char *data, *mdin, *ciphdata; | |
736 | unsigned char hmac[SHA256_DIGEST_LENGTH]; | |
737 | unsigned char hrr[MAX_HRR_SIZE]; | |
738 | size_t rawlen, hmaclen, hrrlen, ciphlen; | |
d0debc0a | 739 | unsigned long tm, now; |
43054d3d MC |
740 | |
741 | /* Ignore any cookie if we're not set up to verify it */ | |
3fa2812f | 742 | if (s->ctx->verify_stateless_cookie_cb == NULL |
555cbb32 | 743 | || (s->s3.flags & TLS1_FLAGS_STATELESS) == 0) |
43054d3d MC |
744 | return 1; |
745 | ||
746 | if (!PACKET_as_length_prefixed_2(pkt, &cookie)) { | |
747 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
748 | SSL_R_LENGTH_MISMATCH); | |
749 | return 0; | |
750 | } | |
751 | ||
752 | raw = cookie; | |
753 | data = PACKET_data(&raw); | |
754 | rawlen = PACKET_remaining(&raw); | |
755 | if (rawlen < SHA256_DIGEST_LENGTH | |
756 | || !PACKET_forward(&raw, rawlen - SHA256_DIGEST_LENGTH)) { | |
757 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
758 | SSL_R_LENGTH_MISMATCH); | |
759 | return 0; | |
760 | } | |
761 | mdin = PACKET_data(&raw); | |
762 | ||
763 | /* Verify the HMAC of the cookie */ | |
764 | hctx = EVP_MD_CTX_create(); | |
f929439f MC |
765 | pkey = EVP_PKEY_new_raw_private_key(EVP_PKEY_HMAC, NULL, |
766 | s->session_ctx->ext.cookie_hmac_key, | |
767 | sizeof(s->session_ctx->ext | |
768 | .cookie_hmac_key)); | |
43054d3d MC |
769 | if (hctx == NULL || pkey == NULL) { |
770 | EVP_MD_CTX_free(hctx); | |
771 | EVP_PKEY_free(pkey); | |
772 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
773 | ERR_R_MALLOC_FAILURE); | |
774 | return 0; | |
775 | } | |
776 | ||
97ea1e7f | 777 | hmaclen = SHA256_DIGEST_LENGTH; |
43054d3d | 778 | if (EVP_DigestSignInit(hctx, NULL, EVP_sha256(), NULL, pkey) <= 0 |
97ea1e7f MC |
779 | || EVP_DigestSign(hctx, hmac, &hmaclen, data, |
780 | rawlen - SHA256_DIGEST_LENGTH) <= 0 | |
43054d3d MC |
781 | || hmaclen != SHA256_DIGEST_LENGTH) { |
782 | EVP_MD_CTX_free(hctx); | |
783 | EVP_PKEY_free(pkey); | |
784 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
785 | ERR_R_INTERNAL_ERROR); | |
786 | return 0; | |
787 | } | |
788 | ||
789 | EVP_MD_CTX_free(hctx); | |
790 | EVP_PKEY_free(pkey); | |
791 | ||
792 | if (CRYPTO_memcmp(hmac, mdin, SHA256_DIGEST_LENGTH) != 0) { | |
793 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
794 | SSL_R_COOKIE_MISMATCH); | |
795 | return 0; | |
796 | } | |
797 | ||
798 | if (!PACKET_get_net_2(&cookie, &format)) { | |
799 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
800 | SSL_R_LENGTH_MISMATCH); | |
801 | return 0; | |
802 | } | |
803 | /* Check the cookie format is something we recognise. Ignore it if not */ | |
804 | if (format != COOKIE_STATE_FORMAT_VERSION) | |
805 | return 1; | |
806 | ||
807 | /* | |
808 | * The rest of these checks really shouldn't fail since we have verified the | |
809 | * HMAC above. | |
810 | */ | |
811 | ||
812 | /* Check the version number is sane */ | |
813 | if (!PACKET_get_net_2(&cookie, &version)) { | |
814 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
815 | SSL_R_LENGTH_MISMATCH); | |
816 | return 0; | |
817 | } | |
818 | if (version != TLS1_3_VERSION) { | |
819 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
820 | SSL_R_BAD_PROTOCOL_VERSION_NUMBER); | |
821 | return 0; | |
822 | } | |
823 | ||
dd77962e | 824 | if (!PACKET_get_net_2(&cookie, &group_id)) { |
43054d3d MC |
825 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, |
826 | SSL_R_LENGTH_MISMATCH); | |
827 | return 0; | |
828 | } | |
dd77962e | 829 | |
43054d3d MC |
830 | ciphdata = PACKET_data(&cookie); |
831 | if (!PACKET_forward(&cookie, 2)) { | |
832 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
833 | SSL_R_LENGTH_MISMATCH); | |
834 | return 0; | |
835 | } | |
555cbb32 TS |
836 | if (group_id != s->s3.group_id |
837 | || s->s3.tmp.new_cipher | |
dd77962e MC |
838 | != ssl_get_cipher_by_char(s, ciphdata, 0)) { |
839 | /* | |
840 | * We chose a different cipher or group id this time around to what is | |
841 | * in the cookie. Something must have changed. | |
842 | */ | |
843 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
844 | SSL_R_BAD_CIPHER); | |
43054d3d MC |
845 | return 0; |
846 | } | |
847 | ||
848 | if (!PACKET_get_1(&cookie, &key_share) | |
d0debc0a | 849 | || !PACKET_get_net_4(&cookie, &tm) |
43054d3d MC |
850 | || !PACKET_get_length_prefixed_2(&cookie, &chhash) |
851 | || !PACKET_get_length_prefixed_1(&cookie, &appcookie) | |
852 | || PACKET_remaining(&cookie) != SHA256_DIGEST_LENGTH) { | |
853 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
854 | SSL_R_LENGTH_MISMATCH); | |
855 | return 0; | |
856 | } | |
857 | ||
d0debc0a MC |
858 | /* We tolerate a cookie age of up to 10 minutes (= 60 * 10 seconds) */ |
859 | now = (unsigned long)time(NULL); | |
860 | if (tm > now || (now - tm) > 600) { | |
861 | /* Cookie is stale. Ignore it */ | |
862 | return 1; | |
863 | } | |
864 | ||
43054d3d | 865 | /* Verify the app cookie */ |
3fa2812f | 866 | if (s->ctx->verify_stateless_cookie_cb(s, PACKET_data(&appcookie), |
43054d3d MC |
867 | PACKET_remaining(&appcookie)) == 0) { |
868 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
869 | SSL_R_COOKIE_MISMATCH); | |
870 | return 0; | |
871 | } | |
872 | ||
873 | /* | |
874 | * Reconstruct the HRR that we would have sent in response to the original | |
875 | * ClientHello so we can add it to the transcript hash. | |
876 | * Note: This won't work with custom HRR extensions | |
877 | */ | |
878 | if (!WPACKET_init_static_len(&hrrpkt, hrr, sizeof(hrr), 0)) { | |
879 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
880 | ERR_R_INTERNAL_ERROR); | |
881 | return 0; | |
882 | } | |
883 | if (!WPACKET_put_bytes_u8(&hrrpkt, SSL3_MT_SERVER_HELLO) | |
884 | || !WPACKET_start_sub_packet_u24(&hrrpkt) | |
885 | || !WPACKET_put_bytes_u16(&hrrpkt, TLS1_2_VERSION) | |
886 | || !WPACKET_memcpy(&hrrpkt, hrrrandom, SSL3_RANDOM_SIZE) | |
887 | || !WPACKET_sub_memcpy_u8(&hrrpkt, s->tmp_session_id, | |
888 | s->tmp_session_id_len) | |
555cbb32 | 889 | || !s->method->put_cipher_by_char(s->s3.tmp.new_cipher, &hrrpkt, |
43054d3d MC |
890 | &ciphlen) |
891 | || !WPACKET_put_bytes_u8(&hrrpkt, 0) | |
892 | || !WPACKET_start_sub_packet_u16(&hrrpkt)) { | |
893 | WPACKET_cleanup(&hrrpkt); | |
894 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
895 | ERR_R_INTERNAL_ERROR); | |
896 | return 0; | |
897 | } | |
898 | if (!WPACKET_put_bytes_u16(&hrrpkt, TLSEXT_TYPE_supported_versions) | |
899 | || !WPACKET_start_sub_packet_u16(&hrrpkt) | |
35e742ec | 900 | || !WPACKET_put_bytes_u16(&hrrpkt, s->version) |
43054d3d MC |
901 | || !WPACKET_close(&hrrpkt)) { |
902 | WPACKET_cleanup(&hrrpkt); | |
903 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
904 | ERR_R_INTERNAL_ERROR); | |
905 | return 0; | |
906 | } | |
907 | if (key_share) { | |
908 | if (!WPACKET_put_bytes_u16(&hrrpkt, TLSEXT_TYPE_key_share) | |
909 | || !WPACKET_start_sub_packet_u16(&hrrpkt) | |
555cbb32 | 910 | || !WPACKET_put_bytes_u16(&hrrpkt, s->s3.group_id) |
43054d3d MC |
911 | || !WPACKET_close(&hrrpkt)) { |
912 | WPACKET_cleanup(&hrrpkt); | |
913 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
914 | ERR_R_INTERNAL_ERROR); | |
915 | return 0; | |
916 | } | |
917 | } | |
918 | if (!WPACKET_put_bytes_u16(&hrrpkt, TLSEXT_TYPE_cookie) | |
919 | || !WPACKET_start_sub_packet_u16(&hrrpkt) | |
920 | || !WPACKET_sub_memcpy_u16(&hrrpkt, data, rawlen) | |
921 | || !WPACKET_close(&hrrpkt) /* cookie extension */ | |
922 | || !WPACKET_close(&hrrpkt) /* extension block */ | |
923 | || !WPACKET_close(&hrrpkt) /* message */ | |
924 | || !WPACKET_get_total_written(&hrrpkt, &hrrlen) | |
925 | || !WPACKET_finish(&hrrpkt)) { | |
926 | WPACKET_cleanup(&hrrpkt); | |
927 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
928 | ERR_R_INTERNAL_ERROR); | |
929 | return 0; | |
930 | } | |
931 | ||
932 | /* Reconstruct the transcript hash */ | |
933 | if (!create_synthetic_message_hash(s, PACKET_data(&chhash), | |
934 | PACKET_remaining(&chhash), hrr, | |
935 | hrrlen)) { | |
936 | /* SSLfatal() already called */ | |
937 | return 0; | |
938 | } | |
939 | ||
940 | /* Act as if this ClientHello came after a HelloRetryRequest */ | |
941 | s->hello_retry_request = 1; | |
942 | ||
c36001c3 | 943 | s->ext.cookieok = 1; |
1aac20f5 | 944 | #endif |
c36001c3 | 945 | |
43054d3d MC |
946 | return 1; |
947 | } | |
948 | ||
25670f3e | 949 | #ifndef OPENSSL_NO_EC |
61138358 | 950 | int tls_parse_ctos_supported_groups(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 951 | X509 *x, size_t chainidx) |
25670f3e MC |
952 | { |
953 | PACKET supported_groups_list; | |
954 | ||
955 | /* Each group is 2 bytes and we must have at least 1. */ | |
956 | if (!PACKET_as_length_prefixed_2(pkt, &supported_groups_list) | |
957 | || PACKET_remaining(&supported_groups_list) == 0 | |
958 | || (PACKET_remaining(&supported_groups_list) % 2) != 0) { | |
f63a17d6 MC |
959 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
960 | SSL_F_TLS_PARSE_CTOS_SUPPORTED_GROUPS, SSL_R_BAD_EXTENSION); | |
25670f3e MC |
961 | return 0; |
962 | } | |
963 | ||
e3743355 BK |
964 | if (!s->hit || SSL_IS_TLS13(s)) { |
965 | OPENSSL_free(s->session->ext.supportedgroups); | |
966 | s->session->ext.supportedgroups = NULL; | |
967 | s->session->ext.supportedgroups_len = 0; | |
9e84a42d | 968 | if (!tls1_save_u16(&supported_groups_list, |
e3743355 BK |
969 | &s->session->ext.supportedgroups, |
970 | &s->session->ext.supportedgroups_len)) { | |
f63a17d6 MC |
971 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
972 | SSL_F_TLS_PARSE_CTOS_SUPPORTED_GROUPS, | |
973 | ERR_R_INTERNAL_ERROR); | |
e3743355 BK |
974 | return 0; |
975 | } | |
25670f3e MC |
976 | } |
977 | ||
978 | return 1; | |
979 | } | |
980 | #endif | |
981 | ||
61138358 | 982 | int tls_parse_ctos_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 983 | size_t chainidx) |
25670f3e MC |
984 | { |
985 | /* The extension must always be empty */ | |
986 | if (PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
987 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
988 | SSL_F_TLS_PARSE_CTOS_EMS, SSL_R_BAD_EXTENSION); | |
25670f3e MC |
989 | return 0; |
990 | } | |
991 | ||
088dfa13 TS |
992 | if (s->options & SSL_OP_NO_EXTENDED_MASTER_SECRET) |
993 | return 1; | |
994 | ||
555cbb32 | 995 | s->s3.flags |= TLS1_FLAGS_RECEIVED_EXTMS; |
25670f3e MC |
996 | |
997 | return 1; | |
998 | } | |
7da160b0 | 999 | |
38df5a45 MC |
1000 | |
1001 | int tls_parse_ctos_early_data(SSL *s, PACKET *pkt, unsigned int context, | |
f63a17d6 | 1002 | X509 *x, size_t chainidx) |
38df5a45 MC |
1003 | { |
1004 | if (PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
1005 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
1006 | SSL_F_TLS_PARSE_CTOS_EARLY_DATA, SSL_R_BAD_EXTENSION); | |
38df5a45 MC |
1007 | return 0; |
1008 | } | |
1009 | ||
fc7129dc | 1010 | if (s->hello_retry_request != SSL_HRR_NONE) { |
f63a17d6 MC |
1011 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1012 | SSL_F_TLS_PARSE_CTOS_EARLY_DATA, SSL_R_BAD_EXTENSION); | |
d4504fe5 MC |
1013 | return 0; |
1014 | } | |
1015 | ||
38df5a45 MC |
1016 | return 1; |
1017 | } | |
1018 | ||
6cc0b3c2 MC |
1019 | static SSL_TICKET_STATUS tls_get_stateful_ticket(SSL *s, PACKET *tick, |
1020 | SSL_SESSION **sess) | |
1021 | { | |
1022 | SSL_SESSION *tmpsess = NULL; | |
1023 | ||
5f26ddff MC |
1024 | s->ext.ticket_expected = 1; |
1025 | ||
6cc0b3c2 MC |
1026 | switch (PACKET_remaining(tick)) { |
1027 | case 0: | |
1028 | return SSL_TICKET_EMPTY; | |
1029 | ||
1030 | case SSL_MAX_SSL_SESSION_ID_LENGTH: | |
1031 | break; | |
1032 | ||
1033 | default: | |
1034 | return SSL_TICKET_NO_DECRYPT; | |
1035 | } | |
1036 | ||
1037 | tmpsess = lookup_sess_in_cache(s, PACKET_data(tick), | |
1038 | SSL_MAX_SSL_SESSION_ID_LENGTH); | |
1039 | ||
1040 | if (tmpsess == NULL) | |
1041 | return SSL_TICKET_NO_DECRYPT; | |
1042 | ||
6cc0b3c2 MC |
1043 | *sess = tmpsess; |
1044 | return SSL_TICKET_SUCCESS; | |
1045 | } | |
1046 | ||
61138358 | 1047 | int tls_parse_ctos_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1048 | size_t chainidx) |
1053a6e2 MC |
1049 | { |
1050 | PACKET identities, binders, binder; | |
1051 | size_t binderoffset, hashsize; | |
1052 | SSL_SESSION *sess = NULL; | |
3a7c56b2 | 1053 | unsigned int id, i, ext = 0; |
1053a6e2 MC |
1054 | const EVP_MD *md = NULL; |
1055 | ||
1a9f457c MC |
1056 | /* |
1057 | * If we have no PSK kex mode that we recognise then we can't resume so | |
1058 | * ignore this extension | |
1059 | */ | |
1060 | if ((s->ext.psk_kex_mode | |
1061 | & (TLSEXT_KEX_MODE_FLAG_KE | TLSEXT_KEX_MODE_FLAG_KE_DHE)) == 0) | |
1062 | return 1; | |
1063 | ||
1053a6e2 | 1064 | if (!PACKET_get_length_prefixed_2(pkt, &identities)) { |
f63a17d6 MC |
1065 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
1066 | SSL_F_TLS_PARSE_CTOS_PSK, SSL_R_BAD_EXTENSION); | |
1053a6e2 MC |
1067 | return 0; |
1068 | } | |
1069 | ||
61fb5923 | 1070 | s->ext.ticket_expected = 0; |
1053a6e2 MC |
1071 | for (id = 0; PACKET_remaining(&identities) != 0; id++) { |
1072 | PACKET identity; | |
2c604cb9 | 1073 | unsigned long ticket_agel; |
f3d40db1 | 1074 | size_t idlen; |
1053a6e2 MC |
1075 | |
1076 | if (!PACKET_get_length_prefixed_2(&identities, &identity) | |
2c604cb9 | 1077 | || !PACKET_get_net_4(&identities, &ticket_agel)) { |
f63a17d6 MC |
1078 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
1079 | SSL_F_TLS_PARSE_CTOS_PSK, SSL_R_BAD_EXTENSION); | |
1053a6e2 MC |
1080 | return 0; |
1081 | } | |
1082 | ||
f3d40db1 | 1083 | idlen = PACKET_remaining(&identity); |
3a7c56b2 | 1084 | if (s->psk_find_session_cb != NULL |
f3d40db1 | 1085 | && !s->psk_find_session_cb(s, PACKET_data(&identity), idlen, |
011d768a | 1086 | &sess)) { |
f63a17d6 MC |
1087 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1088 | SSL_F_TLS_PARSE_CTOS_PSK, SSL_R_BAD_EXTENSION); | |
011d768a MC |
1089 | return 0; |
1090 | } | |
1091 | ||
c2b290c3 | 1092 | #ifndef OPENSSL_NO_PSK |
f3d40db1 MC |
1093 | if(sess == NULL |
1094 | && s->psk_server_callback != NULL | |
1095 | && idlen <= PSK_MAX_IDENTITY_LEN) { | |
1096 | char *pskid = NULL; | |
1097 | unsigned char pskdata[PSK_MAX_PSK_LEN]; | |
1098 | unsigned int pskdatalen; | |
1099 | ||
1100 | if (!PACKET_strndup(&identity, &pskid)) { | |
1101 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_PSK, | |
1102 | ERR_R_INTERNAL_ERROR); | |
1103 | return 0; | |
1104 | } | |
1105 | pskdatalen = s->psk_server_callback(s, pskid, pskdata, | |
1106 | sizeof(pskdata)); | |
1107 | OPENSSL_free(pskid); | |
1108 | if (pskdatalen > PSK_MAX_PSK_LEN) { | |
1109 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_PSK, | |
1110 | ERR_R_INTERNAL_ERROR); | |
1111 | return 0; | |
1112 | } else if (pskdatalen > 0) { | |
1113 | const SSL_CIPHER *cipher; | |
1114 | const unsigned char tls13_aes128gcmsha256_id[] = { 0x13, 0x01 }; | |
1115 | ||
1116 | /* | |
1117 | * We found a PSK using an old style callback. We don't know | |
1118 | * the digest so we default to SHA256 as per the TLSv1.3 spec | |
1119 | */ | |
1120 | cipher = SSL_CIPHER_find(s, tls13_aes128gcmsha256_id); | |
1121 | if (cipher == NULL) { | |
1122 | OPENSSL_cleanse(pskdata, pskdatalen); | |
1123 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_PSK, | |
1124 | ERR_R_INTERNAL_ERROR); | |
1125 | return 0; | |
1126 | } | |
1127 | ||
1128 | sess = SSL_SESSION_new(); | |
1129 | if (sess == NULL | |
1130 | || !SSL_SESSION_set1_master_key(sess, pskdata, | |
1131 | pskdatalen) | |
1132 | || !SSL_SESSION_set_cipher(sess, cipher) | |
1133 | || !SSL_SESSION_set_protocol_version(sess, | |
1134 | TLS1_3_VERSION)) { | |
1135 | OPENSSL_cleanse(pskdata, pskdatalen); | |
1136 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_PSK, | |
1137 | ERR_R_INTERNAL_ERROR); | |
1138 | goto err; | |
1139 | } | |
1140 | OPENSSL_cleanse(pskdata, pskdatalen); | |
1141 | } | |
1142 | } | |
c2b290c3 | 1143 | #endif /* OPENSSL_NO_PSK */ |
f3d40db1 | 1144 | |
011d768a MC |
1145 | if (sess != NULL) { |
1146 | /* We found a PSK */ | |
3a7c56b2 | 1147 | SSL_SESSION *sesstmp = ssl_session_dup(sess, 0); |
1b8bacff | 1148 | |
3a7c56b2 | 1149 | if (sesstmp == NULL) { |
f63a17d6 MC |
1150 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1151 | SSL_F_TLS_PARSE_CTOS_PSK, ERR_R_INTERNAL_ERROR); | |
3a7c56b2 MC |
1152 | return 0; |
1153 | } | |
1154 | SSL_SESSION_free(sess); | |
1155 | sess = sesstmp; | |
1156 | ||
1157 | /* | |
1158 | * We've just been told to use this session for this context so | |
1159 | * make sure the sid_ctx matches up. | |
1160 | */ | |
1161 | memcpy(sess->sid_ctx, s->sid_ctx, s->sid_ctx_length); | |
1162 | sess->sid_ctx_length = s->sid_ctx_length; | |
1163 | ext = 1; | |
630369d9 MC |
1164 | if (id == 0) |
1165 | s->ext.early_data_ok = 1; | |
51256b34 | 1166 | s->ext.ticket_expected = 1; |
3a7c56b2 MC |
1167 | } else { |
1168 | uint32_t ticket_age = 0, now, agesec, agems; | |
61fb5923 MC |
1169 | int ret; |
1170 | ||
e880d4e5 MC |
1171 | /* |
1172 | * If we are using anti-replay protection then we behave as if | |
1173 | * SSL_OP_NO_TICKET is set - we are caching tickets anyway so there | |
1174 | * is no point in using full stateless tickets. | |
1175 | */ | |
1176 | if ((s->options & SSL_OP_NO_TICKET) != 0 | |
5d263fb7 MC |
1177 | || (s->max_early_data > 0 |
1178 | && (s->options & SSL_OP_NO_ANTI_REPLAY) == 0)) | |
6cc0b3c2 MC |
1179 | ret = tls_get_stateful_ticket(s, &identity, &sess); |
1180 | else | |
1181 | ret = tls_decrypt_ticket(s, PACKET_data(&identity), | |
1182 | PACKET_remaining(&identity), NULL, 0, | |
1183 | &sess); | |
61fb5923 MC |
1184 | |
1185 | if (ret == SSL_TICKET_EMPTY) { | |
1186 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_PSK, | |
1187 | SSL_R_BAD_EXTENSION); | |
1188 | return 0; | |
1189 | } | |
3a7c56b2 | 1190 | |
df0fed9a TS |
1191 | if (ret == SSL_TICKET_FATAL_ERR_MALLOC |
1192 | || ret == SSL_TICKET_FATAL_ERR_OTHER) { | |
f63a17d6 MC |
1193 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1194 | SSL_F_TLS_PARSE_CTOS_PSK, ERR_R_INTERNAL_ERROR); | |
3a7c56b2 MC |
1195 | return 0; |
1196 | } | |
61fb5923 | 1197 | if (ret == SSL_TICKET_NONE || ret == SSL_TICKET_NO_DECRYPT) |
3a7c56b2 MC |
1198 | continue; |
1199 | ||
66d7de16 MC |
1200 | /* Check for replay */ |
1201 | if (s->max_early_data > 0 | |
5d263fb7 | 1202 | && (s->options & SSL_OP_NO_ANTI_REPLAY) == 0 |
66d7de16 MC |
1203 | && !SSL_CTX_remove_session(s->session_ctx, sess)) { |
1204 | SSL_SESSION_free(sess); | |
1205 | sess = NULL; | |
1206 | continue; | |
1207 | } | |
1208 | ||
3a7c56b2 MC |
1209 | ticket_age = (uint32_t)ticket_agel; |
1210 | now = (uint32_t)time(NULL); | |
1211 | agesec = now - (uint32_t)sess->time; | |
1212 | agems = agesec * (uint32_t)1000; | |
1213 | ticket_age -= sess->ext.tick_age_add; | |
1214 | ||
1215 | /* | |
1216 | * For simplicity we do our age calculations in seconds. If the | |
1217 | * client does it in ms then it could appear that their ticket age | |
1218 | * is longer than ours (our ticket age calculation should always be | |
1219 | * slightly longer than the client's due to the network latency). | |
1220 | * Therefore we add 1000ms to our age calculation to adjust for | |
1221 | * rounding errors. | |
1222 | */ | |
630369d9 MC |
1223 | if (id == 0 |
1224 | && sess->timeout >= (long)agesec | |
3a7c56b2 MC |
1225 | && agems / (uint32_t)1000 == agesec |
1226 | && ticket_age <= agems + 1000 | |
1227 | && ticket_age + TICKET_AGE_ALLOWANCE >= agems + 1000) { | |
1228 | /* | |
1229 | * Ticket age is within tolerance and not expired. We allow it | |
1230 | * for early data | |
1231 | */ | |
1232 | s->ext.early_data_ok = 1; | |
1233 | } | |
1053a6e2 | 1234 | } |
1053a6e2 | 1235 | |
534a43ff | 1236 | md = ssl_md(sess->cipher->algorithm2); |
555cbb32 | 1237 | if (md != ssl_md(s->s3.tmp.new_cipher->algorithm2)) { |
0de6d66d | 1238 | /* The ciphersuite is not compatible with this session. */ |
1053a6e2 MC |
1239 | SSL_SESSION_free(sess); |
1240 | sess = NULL; | |
630369d9 | 1241 | s->ext.early_data_ok = 0; |
51256b34 | 1242 | s->ext.ticket_expected = 0; |
1053a6e2 MC |
1243 | continue; |
1244 | } | |
1053a6e2 MC |
1245 | break; |
1246 | } | |
1247 | ||
1248 | if (sess == NULL) | |
1249 | return 1; | |
1250 | ||
1251 | binderoffset = PACKET_data(pkt) - (const unsigned char *)s->init_buf->data; | |
1053a6e2 MC |
1252 | hashsize = EVP_MD_size(md); |
1253 | ||
1254 | if (!PACKET_get_length_prefixed_2(pkt, &binders)) { | |
f63a17d6 MC |
1255 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_PSK, |
1256 | SSL_R_BAD_EXTENSION); | |
1053a6e2 MC |
1257 | goto err; |
1258 | } | |
1259 | ||
1260 | for (i = 0; i <= id; i++) { | |
1261 | if (!PACKET_get_length_prefixed_1(&binders, &binder)) { | |
f63a17d6 MC |
1262 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_PSK, |
1263 | SSL_R_BAD_EXTENSION); | |
1053a6e2 MC |
1264 | goto err; |
1265 | } | |
1266 | } | |
1267 | ||
2894e9cb MC |
1268 | if (PACKET_remaining(&binder) != hashsize) { |
1269 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_PSK, | |
1270 | SSL_R_BAD_EXTENSION); | |
1271 | goto err; | |
1272 | } | |
1273 | if (tls_psk_do_binder(s, md, (const unsigned char *)s->init_buf->data, | |
1274 | binderoffset, PACKET_data(&binder), NULL, sess, 0, | |
1275 | ext) != 1) { | |
635c8f77 | 1276 | /* SSLfatal() already called */ |
1053a6e2 MC |
1277 | goto err; |
1278 | } | |
1279 | ||
c96ce52c | 1280 | s->ext.tick_identity = id; |
2c604cb9 | 1281 | |
1053a6e2 MC |
1282 | SSL_SESSION_free(s->session); |
1283 | s->session = sess; | |
1053a6e2 MC |
1284 | return 1; |
1285 | err: | |
312e9387 | 1286 | SSL_SESSION_free(sess); |
1053a6e2 MC |
1287 | return 0; |
1288 | } | |
1289 | ||
9d75dce3 TS |
1290 | int tls_parse_ctos_post_handshake_auth(SSL *s, PACKET *pkt, unsigned int context, |
1291 | X509 *x, size_t chainidx) | |
1292 | { | |
1293 | if (PACKET_remaining(pkt) != 0) { | |
1294 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_POST_HANDSHAKE_AUTH, | |
1295 | SSL_R_POST_HANDSHAKE_AUTH_ENCODING_ERR); | |
1296 | return 0; | |
1297 | } | |
1298 | ||
1299 | s->post_handshake_auth = SSL_PHA_EXT_RECEIVED; | |
1300 | ||
1301 | return 1; | |
1302 | } | |
1303 | ||
1266eefd MC |
1304 | /* |
1305 | * Add the server's renegotiation binding | |
1306 | */ | |
b186a592 MC |
1307 | EXT_RETURN tls_construct_stoc_renegotiate(SSL *s, WPACKET *pkt, |
1308 | unsigned int context, X509 *x, | |
f63a17d6 | 1309 | size_t chainidx) |
7da160b0 | 1310 | { |
555cbb32 | 1311 | if (!s->s3.send_connection_binding) |
b186a592 | 1312 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 1313 | |
db0f35dd | 1314 | /* Still add this even if SSL_OP_NO_RENEGOTIATION is set */ |
7da160b0 MC |
1315 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_renegotiate) |
1316 | || !WPACKET_start_sub_packet_u16(pkt) | |
1317 | || !WPACKET_start_sub_packet_u8(pkt) | |
555cbb32 TS |
1318 | || !WPACKET_memcpy(pkt, s->s3.previous_client_finished, |
1319 | s->s3.previous_client_finished_len) | |
1320 | || !WPACKET_memcpy(pkt, s->s3.previous_server_finished, | |
1321 | s->s3.previous_server_finished_len) | |
7da160b0 MC |
1322 | || !WPACKET_close(pkt) |
1323 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
1324 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_RENEGOTIATE, |
1325 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1326 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1327 | } |
1328 | ||
b186a592 | 1329 | return EXT_RETURN_SENT; |
7da160b0 MC |
1330 | } |
1331 | ||
b186a592 MC |
1332 | EXT_RETURN tls_construct_stoc_server_name(SSL *s, WPACKET *pkt, |
1333 | unsigned int context, X509 *x, | |
f63a17d6 | 1334 | size_t chainidx) |
7da160b0 MC |
1335 | { |
1336 | if (s->hit || s->servername_done != 1 | |
1c4aa31d | 1337 | || s->ext.hostname == NULL) |
b186a592 | 1338 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1339 | |
1340 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_server_name) | |
1341 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
f63a17d6 MC |
1342 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_SERVER_NAME, |
1343 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1344 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1345 | } |
1346 | ||
b186a592 | 1347 | return EXT_RETURN_SENT; |
7da160b0 MC |
1348 | } |
1349 | ||
cf72c757 F |
1350 | /* Add/include the server's max fragment len extension into ServerHello */ |
1351 | EXT_RETURN tls_construct_stoc_maxfragmentlen(SSL *s, WPACKET *pkt, | |
1352 | unsigned int context, X509 *x, | |
f63a17d6 | 1353 | size_t chainidx) |
cf72c757 F |
1354 | { |
1355 | if (!USE_MAX_FRAGMENT_LENGTH_EXT(s->session)) | |
1356 | return EXT_RETURN_NOT_SENT; | |
1357 | ||
1358 | /*- | |
1359 | * 4 bytes for this extension type and extension length | |
1360 | * 1 byte for the Max Fragment Length code value. | |
1361 | */ | |
1362 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_max_fragment_length) | |
1363 | || !WPACKET_start_sub_packet_u16(pkt) | |
1364 | || !WPACKET_put_bytes_u8(pkt, s->session->ext.max_fragment_len_mode) | |
1365 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
1366 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1367 | SSL_F_TLS_CONSTRUCT_STOC_MAXFRAGMENTLEN, ERR_R_INTERNAL_ERROR); | |
cf72c757 F |
1368 | return EXT_RETURN_FAIL; |
1369 | } | |
1370 | ||
1371 | return EXT_RETURN_SENT; | |
1372 | } | |
1373 | ||
7da160b0 | 1374 | #ifndef OPENSSL_NO_EC |
b186a592 MC |
1375 | EXT_RETURN tls_construct_stoc_ec_pt_formats(SSL *s, WPACKET *pkt, |
1376 | unsigned int context, X509 *x, | |
f63a17d6 | 1377 | size_t chainidx) |
7da160b0 | 1378 | { |
555cbb32 TS |
1379 | unsigned long alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
1380 | unsigned long alg_a = s->s3.tmp.new_cipher->algorithm_auth; | |
89247375 | 1381 | int using_ecc = ((alg_k & SSL_kECDHE) || (alg_a & SSL_aECDSA)) |
aff8c126 | 1382 | && (s->session->ext.ecpointformats != NULL); |
7da160b0 MC |
1383 | const unsigned char *plist; |
1384 | size_t plistlen; | |
1385 | ||
1386 | if (!using_ecc) | |
b186a592 | 1387 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1388 | |
1389 | tls1_get_formatlist(s, &plist, &plistlen); | |
7da160b0 MC |
1390 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_ec_point_formats) |
1391 | || !WPACKET_start_sub_packet_u16(pkt) | |
1392 | || !WPACKET_sub_memcpy_u8(pkt, plist, plistlen) | |
1393 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
1394 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1395 | SSL_F_TLS_CONSTRUCT_STOC_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1396 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1397 | } |
1398 | ||
b186a592 | 1399 | return EXT_RETURN_SENT; |
7da160b0 MC |
1400 | } |
1401 | #endif | |
1402 | ||
cf53cbea | 1403 | #ifndef OPENSSL_NO_EC |
b186a592 MC |
1404 | EXT_RETURN tls_construct_stoc_supported_groups(SSL *s, WPACKET *pkt, |
1405 | unsigned int context, X509 *x, | |
f63a17d6 | 1406 | size_t chainidx) |
6af87546 | 1407 | { |
9e84a42d | 1408 | const uint16_t *groups; |
6af87546 MC |
1409 | size_t numgroups, i, first = 1; |
1410 | ||
555cbb32 TS |
1411 | /* s->s3.group_id is non zero if we accepted a key_share */ |
1412 | if (s->s3.group_id == 0) | |
b186a592 | 1413 | return EXT_RETURN_NOT_SENT; |
6af87546 MC |
1414 | |
1415 | /* Get our list of supported groups */ | |
ff6d20a6 | 1416 | tls1_get_supported_groups(s, &groups, &numgroups); |
34e5292c | 1417 | if (numgroups == 0) { |
f63a17d6 MC |
1418 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1419 | SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1420 | return EXT_RETURN_FAIL; |
6af87546 MC |
1421 | } |
1422 | ||
1423 | /* Copy group ID if supported */ | |
9e84a42d DSH |
1424 | for (i = 0; i < numgroups; i++) { |
1425 | uint16_t group = groups[i]; | |
1426 | ||
9aaecbfc | 1427 | if (tls_valid_group(s, group, SSL_version(s)) |
1428 | && tls_curve_allowed(s, group, SSL_SECOP_CURVE_SUPPORTED)) { | |
6af87546 MC |
1429 | if (first) { |
1430 | /* | |
1431 | * Check if the client is already using our preferred group. If | |
1432 | * so we don't need to add this extension | |
1433 | */ | |
555cbb32 | 1434 | if (s->s3.group_id == group) |
b186a592 | 1435 | return EXT_RETURN_NOT_SENT; |
6af87546 MC |
1436 | |
1437 | /* Add extension header */ | |
1438 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_groups) | |
1439 | /* Sub-packet for supported_groups extension */ | |
1440 | || !WPACKET_start_sub_packet_u16(pkt) | |
1441 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
f63a17d6 MC |
1442 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1443 | SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS, | |
1444 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1445 | return EXT_RETURN_FAIL; |
6af87546 MC |
1446 | } |
1447 | ||
1448 | first = 0; | |
1449 | } | |
9e84a42d | 1450 | if (!WPACKET_put_bytes_u16(pkt, group)) { |
f63a17d6 MC |
1451 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1452 | SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS, | |
1453 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1454 | return EXT_RETURN_FAIL; |
6af87546 MC |
1455 | } |
1456 | } | |
1457 | } | |
1458 | ||
1459 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
1460 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1461 | SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS, | |
1462 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1463 | return EXT_RETURN_FAIL; |
6af87546 MC |
1464 | } |
1465 | ||
b186a592 | 1466 | return EXT_RETURN_SENT; |
6af87546 | 1467 | } |
cf53cbea | 1468 | #endif |
6af87546 | 1469 | |
b186a592 MC |
1470 | EXT_RETURN tls_construct_stoc_session_ticket(SSL *s, WPACKET *pkt, |
1471 | unsigned int context, X509 *x, | |
f63a17d6 | 1472 | size_t chainidx) |
7da160b0 | 1473 | { |
aff8c126 RS |
1474 | if (!s->ext.ticket_expected || !tls_use_ticket(s)) { |
1475 | s->ext.ticket_expected = 0; | |
b186a592 | 1476 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1477 | } |
1478 | ||
1479 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket) | |
1480 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
f63a17d6 MC |
1481 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1482 | SSL_F_TLS_CONSTRUCT_STOC_SESSION_TICKET, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1483 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1484 | } |
1485 | ||
b186a592 | 1486 | return EXT_RETURN_SENT; |
7da160b0 MC |
1487 | } |
1488 | ||
ab83e314 | 1489 | #ifndef OPENSSL_NO_OCSP |
b186a592 MC |
1490 | EXT_RETURN tls_construct_stoc_status_request(SSL *s, WPACKET *pkt, |
1491 | unsigned int context, X509 *x, | |
f63a17d6 | 1492 | size_t chainidx) |
7da160b0 | 1493 | { |
aff8c126 | 1494 | if (!s->ext.status_expected) |
b186a592 | 1495 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 1496 | |
8521ced6 | 1497 | if (SSL_IS_TLS13(s) && chainidx != 0) |
b186a592 | 1498 | return EXT_RETURN_NOT_SENT; |
e96e0f8e | 1499 | |
7da160b0 | 1500 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request) |
f63e4288 | 1501 | || !WPACKET_start_sub_packet_u16(pkt)) { |
f63a17d6 MC |
1502 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1503 | SSL_F_TLS_CONSTRUCT_STOC_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1504 | return EXT_RETURN_FAIL; |
f63e4288 MC |
1505 | } |
1506 | ||
1507 | /* | |
1508 | * In TLSv1.3 we include the certificate status itself. In <= TLSv1.2 we | |
1509 | * send back an empty extension, with the certificate status appearing as a | |
1510 | * separate message | |
1511 | */ | |
3ec8d113 MC |
1512 | if (SSL_IS_TLS13(s) && !tls_construct_cert_status_body(s, pkt)) { |
1513 | /* SSLfatal() already called */ | |
56d36288 | 1514 | return EXT_RETURN_FAIL; |
3ec8d113 MC |
1515 | } |
1516 | if (!WPACKET_close(pkt)) { | |
f63a17d6 MC |
1517 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1518 | SSL_F_TLS_CONSTRUCT_STOC_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1519 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1520 | } |
1521 | ||
b186a592 | 1522 | return EXT_RETURN_SENT; |
7da160b0 | 1523 | } |
ab83e314 | 1524 | #endif |
7da160b0 | 1525 | |
7da160b0 | 1526 | #ifndef OPENSSL_NO_NEXTPROTONEG |
b186a592 MC |
1527 | EXT_RETURN tls_construct_stoc_next_proto_neg(SSL *s, WPACKET *pkt, |
1528 | unsigned int context, X509 *x, | |
f63a17d6 | 1529 | size_t chainidx) |
7da160b0 MC |
1530 | { |
1531 | const unsigned char *npa; | |
1532 | unsigned int npalen; | |
1533 | int ret; | |
555cbb32 | 1534 | int npn_seen = s->s3.npn_seen; |
7da160b0 | 1535 | |
555cbb32 | 1536 | s->s3.npn_seen = 0; |
aff8c126 | 1537 | if (!npn_seen || s->ctx->ext.npn_advertised_cb == NULL) |
b186a592 | 1538 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 1539 | |
aff8c126 RS |
1540 | ret = s->ctx->ext.npn_advertised_cb(s, &npa, &npalen, |
1541 | s->ctx->ext.npn_advertised_cb_arg); | |
7da160b0 MC |
1542 | if (ret == SSL_TLSEXT_ERR_OK) { |
1543 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_next_proto_neg) | |
1544 | || !WPACKET_sub_memcpy_u16(pkt, npa, npalen)) { | |
f63a17d6 MC |
1545 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1546 | SSL_F_TLS_CONSTRUCT_STOC_NEXT_PROTO_NEG, | |
1547 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1548 | return EXT_RETURN_FAIL; |
7da160b0 | 1549 | } |
555cbb32 | 1550 | s->s3.npn_seen = 1; |
7da160b0 MC |
1551 | } |
1552 | ||
b186a592 | 1553 | return EXT_RETURN_SENT; |
7da160b0 MC |
1554 | } |
1555 | #endif | |
1556 | ||
b186a592 | 1557 | EXT_RETURN tls_construct_stoc_alpn(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 1558 | X509 *x, size_t chainidx) |
7da160b0 | 1559 | { |
555cbb32 | 1560 | if (s->s3.alpn_selected == NULL) |
b186a592 | 1561 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1562 | |
1563 | if (!WPACKET_put_bytes_u16(pkt, | |
1564 | TLSEXT_TYPE_application_layer_protocol_negotiation) | |
1565 | || !WPACKET_start_sub_packet_u16(pkt) | |
1566 | || !WPACKET_start_sub_packet_u16(pkt) | |
555cbb32 TS |
1567 | || !WPACKET_sub_memcpy_u8(pkt, s->s3.alpn_selected, |
1568 | s->s3.alpn_selected_len) | |
7da160b0 MC |
1569 | || !WPACKET_close(pkt) |
1570 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
1571 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1572 | SSL_F_TLS_CONSTRUCT_STOC_ALPN, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1573 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1574 | } |
1575 | ||
b186a592 | 1576 | return EXT_RETURN_SENT; |
7da160b0 MC |
1577 | } |
1578 | ||
1579 | #ifndef OPENSSL_NO_SRTP | |
b186a592 MC |
1580 | EXT_RETURN tls_construct_stoc_use_srtp(SSL *s, WPACKET *pkt, |
1581 | unsigned int context, X509 *x, | |
f63a17d6 | 1582 | size_t chainidx) |
7da160b0 MC |
1583 | { |
1584 | if (s->srtp_profile == NULL) | |
b186a592 | 1585 | return EXT_RETURN_NOT_SENT; |
a1448c26 | 1586 | |
7da160b0 MC |
1587 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp) |
1588 | || !WPACKET_start_sub_packet_u16(pkt) | |
1589 | || !WPACKET_put_bytes_u16(pkt, 2) | |
1590 | || !WPACKET_put_bytes_u16(pkt, s->srtp_profile->id) | |
1591 | || !WPACKET_put_bytes_u8(pkt, 0) | |
1592 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
1593 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_USE_SRTP, |
1594 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1595 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1596 | } |
1597 | ||
b186a592 | 1598 | return EXT_RETURN_SENT; |
7da160b0 MC |
1599 | } |
1600 | #endif | |
1601 | ||
b186a592 | 1602 | EXT_RETURN tls_construct_stoc_etm(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 1603 | X509 *x, size_t chainidx) |
7da160b0 | 1604 | { |
28a31a0a | 1605 | if (!s->ext.use_etm) |
b186a592 | 1606 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1607 | |
1608 | /* | |
1609 | * Don't use encrypt_then_mac if AEAD or RC4 might want to disable | |
1610 | * for other cases too. | |
1611 | */ | |
555cbb32 TS |
1612 | if (s->s3.tmp.new_cipher->algorithm_mac == SSL_AEAD |
1613 | || s->s3.tmp.new_cipher->algorithm_enc == SSL_RC4 | |
1614 | || s->s3.tmp.new_cipher->algorithm_enc == SSL_eGOST2814789CNT | |
1615 | || s->s3.tmp.new_cipher->algorithm_enc == SSL_eGOST2814789CNT12) { | |
28a31a0a | 1616 | s->ext.use_etm = 0; |
b186a592 | 1617 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1618 | } |
1619 | ||
1620 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac) | |
1621 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
f63a17d6 MC |
1622 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_ETM, |
1623 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1624 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1625 | } |
1626 | ||
b186a592 | 1627 | return EXT_RETURN_SENT; |
7da160b0 MC |
1628 | } |
1629 | ||
b186a592 | 1630 | EXT_RETURN tls_construct_stoc_ems(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 1631 | X509 *x, size_t chainidx) |
7da160b0 | 1632 | { |
555cbb32 | 1633 | if ((s->s3.flags & TLS1_FLAGS_RECEIVED_EXTMS) == 0) |
b186a592 | 1634 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1635 | |
1636 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret) | |
1637 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
f63a17d6 MC |
1638 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_EMS, |
1639 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1640 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1641 | } |
1642 | ||
b186a592 | 1643 | return EXT_RETURN_SENT; |
7da160b0 MC |
1644 | } |
1645 | ||
88050dd1 MC |
1646 | EXT_RETURN tls_construct_stoc_supported_versions(SSL *s, WPACKET *pkt, |
1647 | unsigned int context, X509 *x, | |
1648 | size_t chainidx) | |
1649 | { | |
27e462f1 MC |
1650 | if (!ossl_assert(SSL_IS_TLS13(s))) { |
1651 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
1652 | SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_VERSIONS, | |
1653 | ERR_R_INTERNAL_ERROR); | |
1654 | return EXT_RETURN_FAIL; | |
1655 | } | |
88050dd1 MC |
1656 | |
1657 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_versions) | |
1658 | || !WPACKET_start_sub_packet_u16(pkt) | |
35e742ec | 1659 | || !WPACKET_put_bytes_u16(pkt, s->version) |
88050dd1 MC |
1660 | || !WPACKET_close(pkt)) { |
1661 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
1662 | SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_VERSIONS, | |
1663 | ERR_R_INTERNAL_ERROR); | |
1664 | return EXT_RETURN_FAIL; | |
1665 | } | |
1666 | ||
1667 | return EXT_RETURN_SENT; | |
1668 | } | |
1669 | ||
b186a592 MC |
1670 | EXT_RETURN tls_construct_stoc_key_share(SSL *s, WPACKET *pkt, |
1671 | unsigned int context, X509 *x, | |
f63a17d6 | 1672 | size_t chainidx) |
7da160b0 | 1673 | { |
3cf96e88 | 1674 | #ifndef OPENSSL_NO_TLS1_3 |
7da160b0 MC |
1675 | unsigned char *encodedPoint; |
1676 | size_t encoded_pt_len = 0; | |
555cbb32 | 1677 | EVP_PKEY *ckey = s->s3.peer_tmp, *skey = NULL; |
7da160b0 | 1678 | |
dd77962e MC |
1679 | if (s->hello_retry_request == SSL_HRR_PENDING) { |
1680 | if (ckey != NULL) { | |
1681 | /* Original key_share was acceptable so don't ask for another one */ | |
1682 | return EXT_RETURN_NOT_SENT; | |
1683 | } | |
1684 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
1685 | || !WPACKET_start_sub_packet_u16(pkt) | |
555cbb32 | 1686 | || !WPACKET_put_bytes_u16(pkt, s->s3.group_id) |
dd77962e MC |
1687 | || !WPACKET_close(pkt)) { |
1688 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
1689 | SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, | |
1690 | ERR_R_INTERNAL_ERROR); | |
1691 | return EXT_RETURN_FAIL; | |
7d061fce MC |
1692 | } |
1693 | ||
dd77962e MC |
1694 | return EXT_RETURN_SENT; |
1695 | } | |
1696 | ||
1697 | if (ckey == NULL) { | |
1698 | /* No key_share received from client - must be resuming */ | |
0247086d | 1699 | if (!s->hit || !tls13_generate_handshake_secret(s, NULL, 0)) { |
f63a17d6 MC |
1700 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1701 | SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1702 | return EXT_RETURN_FAIL; |
0247086d | 1703 | } |
b186a592 | 1704 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1705 | } |
1706 | ||
1707 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
1708 | || !WPACKET_start_sub_packet_u16(pkt) | |
555cbb32 | 1709 | || !WPACKET_put_bytes_u16(pkt, s->s3.group_id)) { |
f63a17d6 MC |
1710 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1711 | SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1712 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1713 | } |
1714 | ||
1715 | skey = ssl_generate_pkey(ckey); | |
1716 | if (skey == NULL) { | |
f63a17d6 MC |
1717 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, |
1718 | ERR_R_MALLOC_FAILURE); | |
b186a592 | 1719 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1720 | } |
1721 | ||
1722 | /* Generate encoding of server key */ | |
1723 | encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(skey, &encodedPoint); | |
1724 | if (encoded_pt_len == 0) { | |
f63a17d6 MC |
1725 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, |
1726 | ERR_R_EC_LIB); | |
7da160b0 | 1727 | EVP_PKEY_free(skey); |
b186a592 | 1728 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1729 | } |
1730 | ||
1731 | if (!WPACKET_sub_memcpy_u16(pkt, encodedPoint, encoded_pt_len) | |
1732 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
1733 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, |
1734 | ERR_R_INTERNAL_ERROR); | |
7da160b0 MC |
1735 | EVP_PKEY_free(skey); |
1736 | OPENSSL_free(encodedPoint); | |
b186a592 | 1737 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1738 | } |
1739 | OPENSSL_free(encodedPoint); | |
1740 | ||
1741 | /* This causes the crypto state to be updated based on the derived keys */ | |
555cbb32 | 1742 | s->s3.tmp.pkey = skey; |
7da160b0 | 1743 | if (ssl_derive(s, skey, ckey, 1) == 0) { |
f63a17d6 | 1744 | /* SSLfatal() already called */ |
b186a592 | 1745 | return EXT_RETURN_FAIL; |
7da160b0 | 1746 | } |
b186a592 | 1747 | return EXT_RETURN_SENT; |
1aac20f5 MC |
1748 | #else |
1749 | return EXT_RETURN_FAIL; | |
1750 | #endif | |
7da160b0 MC |
1751 | } |
1752 | ||
43054d3d MC |
1753 | EXT_RETURN tls_construct_stoc_cookie(SSL *s, WPACKET *pkt, unsigned int context, |
1754 | X509 *x, size_t chainidx) | |
1755 | { | |
1aac20f5 | 1756 | #ifndef OPENSSL_NO_TLS1_3 |
43054d3d MC |
1757 | unsigned char *hashval1, *hashval2, *appcookie1, *appcookie2, *cookie; |
1758 | unsigned char *hmac, *hmac2; | |
3fa2812f | 1759 | size_t startlen, ciphlen, totcookielen, hashlen, hmaclen, appcookielen; |
43054d3d MC |
1760 | EVP_MD_CTX *hctx; |
1761 | EVP_PKEY *pkey; | |
1762 | int ret = EXT_RETURN_FAIL; | |
1763 | ||
555cbb32 | 1764 | if ((s->s3.flags & TLS1_FLAGS_STATELESS) == 0) |
43054d3d MC |
1765 | return EXT_RETURN_NOT_SENT; |
1766 | ||
3fa2812f | 1767 | if (s->ctx->gen_stateless_cookie_cb == NULL) { |
e440f513 MC |
1768 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_COOKIE, |
1769 | SSL_R_NO_COOKIE_CALLBACK_SET); | |
1770 | return EXT_RETURN_FAIL; | |
1771 | } | |
1772 | ||
43054d3d MC |
1773 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_cookie) |
1774 | || !WPACKET_start_sub_packet_u16(pkt) | |
1775 | || !WPACKET_start_sub_packet_u16(pkt) | |
1776 | || !WPACKET_get_total_written(pkt, &startlen) | |
1777 | || !WPACKET_reserve_bytes(pkt, MAX_COOKIE_SIZE, &cookie) | |
1778 | || !WPACKET_put_bytes_u16(pkt, COOKIE_STATE_FORMAT_VERSION) | |
1779 | || !WPACKET_put_bytes_u16(pkt, TLS1_3_VERSION) | |
555cbb32 TS |
1780 | || !WPACKET_put_bytes_u16(pkt, s->s3.group_id) |
1781 | || !s->method->put_cipher_by_char(s->s3.tmp.new_cipher, pkt, | |
43054d3d MC |
1782 | &ciphlen) |
1783 | /* Is there a key_share extension present in this HRR? */ | |
555cbb32 | 1784 | || !WPACKET_put_bytes_u8(pkt, s->s3.peer_tmp == NULL) |
d0debc0a | 1785 | || !WPACKET_put_bytes_u32(pkt, (unsigned int)time(NULL)) |
43054d3d MC |
1786 | || !WPACKET_start_sub_packet_u16(pkt) |
1787 | || !WPACKET_reserve_bytes(pkt, EVP_MAX_MD_SIZE, &hashval1)) { | |
1788 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_COOKIE, | |
1789 | ERR_R_INTERNAL_ERROR); | |
1790 | return EXT_RETURN_FAIL; | |
1791 | } | |
1792 | ||
1793 | /* | |
1794 | * Get the hash of the initial ClientHello. ssl_handshake_hash() operates | |
1795 | * on raw buffers, so we first reserve sufficient bytes (above) and then | |
1796 | * subsequently allocate them (below) | |
1797 | */ | |
1798 | if (!ssl3_digest_cached_records(s, 0) | |
1799 | || !ssl_handshake_hash(s, hashval1, EVP_MAX_MD_SIZE, &hashlen)) { | |
1800 | /* SSLfatal() already called */ | |
1801 | return EXT_RETURN_FAIL; | |
1802 | } | |
1803 | ||
1804 | if (!WPACKET_allocate_bytes(pkt, hashlen, &hashval2) | |
1805 | || !ossl_assert(hashval1 == hashval2) | |
1806 | || !WPACKET_close(pkt) | |
1807 | || !WPACKET_start_sub_packet_u8(pkt) | |
1808 | || !WPACKET_reserve_bytes(pkt, SSL_COOKIE_LENGTH, &appcookie1)) { | |
1809 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_COOKIE, | |
1810 | ERR_R_INTERNAL_ERROR); | |
1811 | return EXT_RETURN_FAIL; | |
1812 | } | |
1813 | ||
1814 | /* Generate the application cookie */ | |
3fa2812f | 1815 | if (s->ctx->gen_stateless_cookie_cb(s, appcookie1, &appcookielen) == 0) { |
43054d3d MC |
1816 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_COOKIE, |
1817 | SSL_R_COOKIE_GEN_CALLBACK_FAILURE); | |
1818 | return EXT_RETURN_FAIL; | |
1819 | } | |
1820 | ||
1821 | if (!WPACKET_allocate_bytes(pkt, appcookielen, &appcookie2) | |
1822 | || !ossl_assert(appcookie1 == appcookie2) | |
1823 | || !WPACKET_close(pkt) | |
1824 | || !WPACKET_get_total_written(pkt, &totcookielen) | |
1825 | || !WPACKET_reserve_bytes(pkt, SHA256_DIGEST_LENGTH, &hmac)) { | |
1826 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_COOKIE, | |
1827 | ERR_R_INTERNAL_ERROR); | |
1828 | return EXT_RETURN_FAIL; | |
1829 | } | |
1830 | hmaclen = SHA256_DIGEST_LENGTH; | |
1831 | ||
1832 | totcookielen -= startlen; | |
1833 | if (!ossl_assert(totcookielen <= MAX_COOKIE_SIZE - SHA256_DIGEST_LENGTH)) { | |
1834 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_COOKIE, | |
1835 | ERR_R_INTERNAL_ERROR); | |
1836 | return EXT_RETURN_FAIL; | |
1837 | } | |
1838 | ||
1839 | /* HMAC the cookie */ | |
1840 | hctx = EVP_MD_CTX_create(); | |
f929439f MC |
1841 | pkey = EVP_PKEY_new_raw_private_key(EVP_PKEY_HMAC, NULL, |
1842 | s->session_ctx->ext.cookie_hmac_key, | |
1843 | sizeof(s->session_ctx->ext | |
1844 | .cookie_hmac_key)); | |
43054d3d MC |
1845 | if (hctx == NULL || pkey == NULL) { |
1846 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_COOKIE, | |
1847 | ERR_R_MALLOC_FAILURE); | |
1848 | goto err; | |
1849 | } | |
1850 | ||
1851 | if (EVP_DigestSignInit(hctx, NULL, EVP_sha256(), NULL, pkey) <= 0 | |
1852 | || EVP_DigestSign(hctx, hmac, &hmaclen, cookie, | |
1853 | totcookielen) <= 0) { | |
1854 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_COOKIE, | |
1855 | ERR_R_INTERNAL_ERROR); | |
1856 | goto err; | |
1857 | } | |
1858 | ||
1859 | if (!ossl_assert(totcookielen + hmaclen <= MAX_COOKIE_SIZE)) { | |
1860 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_COOKIE, | |
1861 | ERR_R_INTERNAL_ERROR); | |
1862 | goto err; | |
1863 | } | |
1864 | ||
1865 | if (!WPACKET_allocate_bytes(pkt, hmaclen, &hmac2) | |
1866 | || !ossl_assert(hmac == hmac2) | |
1867 | || !ossl_assert(cookie == hmac - totcookielen) | |
1868 | || !WPACKET_close(pkt) | |
1869 | || !WPACKET_close(pkt)) { | |
1870 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_COOKIE, | |
1871 | ERR_R_INTERNAL_ERROR); | |
1872 | goto err; | |
1873 | } | |
1874 | ||
1875 | ret = EXT_RETURN_SENT; | |
1876 | ||
1877 | err: | |
1878 | EVP_MD_CTX_free(hctx); | |
1879 | EVP_PKEY_free(pkey); | |
1880 | return ret; | |
1aac20f5 MC |
1881 | #else |
1882 | return EXT_RETURN_FAIL; | |
1883 | #endif | |
43054d3d MC |
1884 | } |
1885 | ||
b186a592 MC |
1886 | EXT_RETURN tls_construct_stoc_cryptopro_bug(SSL *s, WPACKET *pkt, |
1887 | unsigned int context, X509 *x, | |
f63a17d6 | 1888 | size_t chainidx) |
7da160b0 MC |
1889 | { |
1890 | const unsigned char cryptopro_ext[36] = { | |
1891 | 0xfd, 0xe8, /* 65000 */ | |
1892 | 0x00, 0x20, /* 32 bytes length */ | |
1893 | 0x30, 0x1e, 0x30, 0x08, 0x06, 0x06, 0x2a, 0x85, | |
1894 | 0x03, 0x02, 0x02, 0x09, 0x30, 0x08, 0x06, 0x06, | |
1895 | 0x2a, 0x85, 0x03, 0x02, 0x02, 0x16, 0x30, 0x08, | |
1896 | 0x06, 0x06, 0x2a, 0x85, 0x03, 0x02, 0x02, 0x17 | |
1897 | }; | |
1898 | ||
555cbb32 TS |
1899 | if (((s->s3.tmp.new_cipher->id & 0xFFFF) != 0x80 |
1900 | && (s->s3.tmp.new_cipher->id & 0xFFFF) != 0x81) | |
7da160b0 | 1901 | || (SSL_get_options(s) & SSL_OP_CRYPTOPRO_TLSEXT_BUG) == 0) |
b186a592 | 1902 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1903 | |
1904 | if (!WPACKET_memcpy(pkt, cryptopro_ext, sizeof(cryptopro_ext))) { | |
f63a17d6 MC |
1905 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1906 | SSL_F_TLS_CONSTRUCT_STOC_CRYPTOPRO_BUG, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1907 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1908 | } |
1909 | ||
b186a592 | 1910 | return EXT_RETURN_SENT; |
7da160b0 | 1911 | } |
0247086d | 1912 | |
b186a592 MC |
1913 | EXT_RETURN tls_construct_stoc_early_data(SSL *s, WPACKET *pkt, |
1914 | unsigned int context, X509 *x, | |
f63a17d6 | 1915 | size_t chainidx) |
38df5a45 | 1916 | { |
fe874d27 | 1917 | if (context == SSL_EXT_TLS1_3_NEW_SESSION_TICKET) { |
6594189f | 1918 | if (s->max_early_data == 0) |
b186a592 | 1919 | return EXT_RETURN_NOT_SENT; |
6594189f MC |
1920 | |
1921 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) | |
1922 | || !WPACKET_start_sub_packet_u16(pkt) | |
1923 | || !WPACKET_put_bytes_u32(pkt, s->max_early_data) | |
1924 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
1925 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1926 | SSL_F_TLS_CONSTRUCT_STOC_EARLY_DATA, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1927 | return EXT_RETURN_FAIL; |
6594189f MC |
1928 | } |
1929 | ||
b186a592 | 1930 | return EXT_RETURN_SENT; |
6594189f MC |
1931 | } |
1932 | ||
38df5a45 | 1933 | if (s->ext.early_data != SSL_EARLY_DATA_ACCEPTED) |
b186a592 | 1934 | return EXT_RETURN_NOT_SENT; |
38df5a45 MC |
1935 | |
1936 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) | |
1937 | || !WPACKET_start_sub_packet_u16(pkt) | |
1938 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
1939 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_EARLY_DATA, |
1940 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1941 | return EXT_RETURN_FAIL; |
38df5a45 MC |
1942 | } |
1943 | ||
b186a592 | 1944 | return EXT_RETURN_SENT; |
38df5a45 MC |
1945 | } |
1946 | ||
b186a592 | 1947 | EXT_RETURN tls_construct_stoc_psk(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 1948 | X509 *x, size_t chainidx) |
0247086d MC |
1949 | { |
1950 | if (!s->hit) | |
b186a592 | 1951 | return EXT_RETURN_NOT_SENT; |
0247086d MC |
1952 | |
1953 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk) | |
1954 | || !WPACKET_start_sub_packet_u16(pkt) | |
c96ce52c | 1955 | || !WPACKET_put_bytes_u16(pkt, s->ext.tick_identity) |
0247086d | 1956 | || !WPACKET_close(pkt)) { |
f63a17d6 MC |
1957 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1958 | SSL_F_TLS_CONSTRUCT_STOC_PSK, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1959 | return EXT_RETURN_FAIL; |
0247086d MC |
1960 | } |
1961 | ||
b186a592 | 1962 | return EXT_RETURN_SENT; |
0247086d | 1963 | } |