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25670f3e | 1 | /* |
6738bf14 | 2 | * Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved. |
25670f3e MC |
3 | * |
4 | * Licensed under the OpenSSL license (the "License"). You may not use | |
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 */ | |
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 | ||
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 | ||
69 | s->s3->send_connection_binding = 1; | |
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 | ||
130 | if (!s->hit) { | |
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 | ||
7d061fce MC |
145 | OPENSSL_free(s->session->ext.hostname); |
146 | s->session->ext.hostname = NULL; | |
aff8c126 | 147 | if (!PACKET_strndup(&hostname, &s->session->ext.hostname)) { |
f63a17d6 MC |
148 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_SERVER_NAME, |
149 | ERR_R_INTERNAL_ERROR); | |
25670f3e MC |
150 | return 0; |
151 | } | |
152 | ||
153 | s->servername_done = 1; | |
154 | } else { | |
155 | /* | |
156 | * TODO(openssl-team): if the SNI doesn't match, we MUST | |
157 | * fall back to a full handshake. | |
158 | */ | |
aff8c126 RS |
159 | s->servername_done = s->session->ext.hostname |
160 | && PACKET_equal(&hostname, s->session->ext.hostname, | |
161 | strlen(s->session->ext.hostname)); | |
630369d9 MC |
162 | |
163 | if (!s->servername_done && s->session->ext.hostname != NULL) | |
164 | s->ext.early_data_ok = 0; | |
25670f3e MC |
165 | } |
166 | ||
167 | return 1; | |
168 | } | |
169 | ||
cf72c757 | 170 | int tls_parse_ctos_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 171 | X509 *x, size_t chainidx) |
cf72c757 F |
172 | { |
173 | unsigned int value; | |
174 | ||
175 | if (PACKET_remaining(pkt) != 1 || !PACKET_get_1(pkt, &value)) { | |
f63a17d6 MC |
176 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_MAXFRAGMENTLEN, |
177 | SSL_R_BAD_EXTENSION); | |
cf72c757 F |
178 | return 0; |
179 | } | |
180 | ||
181 | /* Received |value| should be a valid max-fragment-length code. */ | |
182 | if (!IS_MAX_FRAGMENT_LENGTH_EXT_VALID(value)) { | |
f63a17d6 MC |
183 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
184 | SSL_F_TLS_PARSE_CTOS_MAXFRAGMENTLEN, | |
185 | SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); | |
cf72c757 F |
186 | return 0; |
187 | } | |
188 | ||
189 | /* | |
190 | * RFC 6066: The negotiated length applies for the duration of the session | |
191 | * including session resumptions. | |
192 | * We should receive the same code as in resumed session ! | |
193 | */ | |
194 | if (s->hit && s->session->ext.max_fragment_len_mode != value) { | |
f63a17d6 MC |
195 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
196 | SSL_F_TLS_PARSE_CTOS_MAXFRAGMENTLEN, | |
197 | SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); | |
cf72c757 F |
198 | return 0; |
199 | } | |
200 | ||
201 | /* | |
202 | * Store it in session, so it'll become binding for us | |
203 | * and we'll include it in a next Server Hello. | |
204 | */ | |
205 | s->session->ext.max_fragment_len_mode = value; | |
206 | return 1; | |
207 | } | |
208 | ||
25670f3e | 209 | #ifndef OPENSSL_NO_SRP |
61138358 | 210 | int tls_parse_ctos_srp(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 211 | size_t chainidx) |
25670f3e MC |
212 | { |
213 | PACKET srp_I; | |
214 | ||
215 | if (!PACKET_as_length_prefixed_1(pkt, &srp_I) | |
216 | || PACKET_contains_zero_byte(&srp_I)) { | |
f63a17d6 MC |
217 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
218 | SSL_F_TLS_PARSE_CTOS_SRP, | |
219 | SSL_R_BAD_EXTENSION); | |
25670f3e MC |
220 | return 0; |
221 | } | |
222 | ||
223 | /* | |
224 | * TODO(openssl-team): currently, we re-authenticate the user | |
225 | * upon resumption. Instead, we MUST ignore the login. | |
226 | */ | |
227 | if (!PACKET_strndup(&srp_I, &s->srp_ctx.login)) { | |
f63a17d6 MC |
228 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_SRP, |
229 | ERR_R_INTERNAL_ERROR); | |
25670f3e MC |
230 | return 0; |
231 | } | |
232 | ||
233 | return 1; | |
234 | } | |
235 | #endif | |
236 | ||
237 | #ifndef OPENSSL_NO_EC | |
61138358 | 238 | int tls_parse_ctos_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 239 | X509 *x, size_t chainidx) |
25670f3e MC |
240 | { |
241 | PACKET ec_point_format_list; | |
242 | ||
243 | if (!PACKET_as_length_prefixed_1(pkt, &ec_point_format_list) | |
244 | || PACKET_remaining(&ec_point_format_list) == 0) { | |
f63a17d6 MC |
245 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_EC_PT_FORMATS, |
246 | SSL_R_BAD_EXTENSION); | |
25670f3e MC |
247 | return 0; |
248 | } | |
249 | ||
250 | if (!s->hit) { | |
251 | if (!PACKET_memdup(&ec_point_format_list, | |
aff8c126 RS |
252 | &s->session->ext.ecpointformats, |
253 | &s->session->ext.ecpointformats_len)) { | |
f63a17d6 MC |
254 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
255 | SSL_F_TLS_PARSE_CTOS_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR); | |
25670f3e MC |
256 | return 0; |
257 | } | |
258 | } | |
259 | ||
260 | return 1; | |
261 | } | |
262 | #endif /* OPENSSL_NO_EC */ | |
263 | ||
61138358 | 264 | int tls_parse_ctos_session_ticket(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 265 | X509 *x, size_t chainidx) |
25670f3e | 266 | { |
aff8c126 RS |
267 | if (s->ext.session_ticket_cb && |
268 | !s->ext.session_ticket_cb(s, PACKET_data(pkt), | |
269 | PACKET_remaining(pkt), | |
270 | s->ext.session_ticket_cb_arg)) { | |
f63a17d6 MC |
271 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
272 | SSL_F_TLS_PARSE_CTOS_SESSION_TICKET, ERR_R_INTERNAL_ERROR); | |
25670f3e MC |
273 | return 0; |
274 | } | |
275 | ||
276 | return 1; | |
277 | } | |
278 | ||
c589c34e BK |
279 | int tls_parse_ctos_sig_algs_cert(SSL *s, PACKET *pkt, unsigned int context, |
280 | X509 *x, size_t chainidx) | |
281 | { | |
282 | PACKET supported_sig_algs; | |
283 | ||
284 | if (!PACKET_as_length_prefixed_2(pkt, &supported_sig_algs) | |
285 | || PACKET_remaining(&supported_sig_algs) == 0) { | |
286 | SSLfatal(s, SSL_AD_DECODE_ERROR, | |
287 | SSL_F_TLS_PARSE_CTOS_SIG_ALGS_CERT, SSL_R_BAD_EXTENSION); | |
288 | return 0; | |
289 | } | |
290 | ||
291 | if (!s->hit && !tls1_save_sigalgs(s, &supported_sig_algs, 1)) { | |
292 | SSLfatal(s, SSL_AD_DECODE_ERROR, | |
293 | SSL_F_TLS_PARSE_CTOS_SIG_ALGS_CERT, SSL_R_BAD_EXTENSION); | |
294 | return 0; | |
295 | } | |
296 | ||
297 | return 1; | |
298 | } | |
299 | ||
61138358 | 300 | int tls_parse_ctos_sig_algs(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 301 | size_t chainidx) |
25670f3e MC |
302 | { |
303 | PACKET supported_sig_algs; | |
304 | ||
305 | if (!PACKET_as_length_prefixed_2(pkt, &supported_sig_algs) | |
25670f3e | 306 | || PACKET_remaining(&supported_sig_algs) == 0) { |
f63a17d6 MC |
307 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
308 | SSL_F_TLS_PARSE_CTOS_SIG_ALGS, SSL_R_BAD_EXTENSION); | |
25670f3e MC |
309 | return 0; |
310 | } | |
311 | ||
c589c34e | 312 | if (!s->hit && !tls1_save_sigalgs(s, &supported_sig_algs, 0)) { |
f63a17d6 MC |
313 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
314 | SSL_F_TLS_PARSE_CTOS_SIG_ALGS, SSL_R_BAD_EXTENSION); | |
25670f3e MC |
315 | return 0; |
316 | } | |
317 | ||
318 | return 1; | |
319 | } | |
320 | ||
ab83e314 | 321 | #ifndef OPENSSL_NO_OCSP |
61138358 | 322 | int tls_parse_ctos_status_request(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 323 | X509 *x, size_t chainidx) |
25670f3e | 324 | { |
1266eefd MC |
325 | PACKET responder_id_list, exts; |
326 | ||
ded4a83d MC |
327 | /* We ignore this in a resumption handshake */ |
328 | if (s->hit) | |
329 | return 1; | |
330 | ||
e96e0f8e MC |
331 | /* Not defined if we get one of these in a client Certificate */ |
332 | if (x != NULL) | |
333 | return 1; | |
334 | ||
aff8c126 | 335 | if (!PACKET_get_1(pkt, (unsigned int *)&s->ext.status_type)) { |
f63a17d6 MC |
336 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
337 | SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, SSL_R_BAD_EXTENSION); | |
25670f3e MC |
338 | return 0; |
339 | } | |
ab83e314 | 340 | |
aff8c126 | 341 | if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) { |
25670f3e | 342 | /* |
1266eefd | 343 | * We don't know what to do with any other type so ignore it. |
25670f3e | 344 | */ |
aff8c126 | 345 | s->ext.status_type = TLSEXT_STATUSTYPE_nothing; |
1266eefd MC |
346 | return 1; |
347 | } | |
25670f3e | 348 | |
1266eefd | 349 | if (!PACKET_get_length_prefixed_2 (pkt, &responder_id_list)) { |
f63a17d6 MC |
350 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
351 | SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, SSL_R_BAD_EXTENSION); | |
1266eefd MC |
352 | return 0; |
353 | } | |
25670f3e | 354 | |
1266eefd MC |
355 | /* |
356 | * We remove any OCSP_RESPIDs from a previous handshake | |
357 | * to prevent unbounded memory growth - CVE-2016-6304 | |
358 | */ | |
aff8c126 | 359 | sk_OCSP_RESPID_pop_free(s->ext.ocsp.ids, OCSP_RESPID_free); |
1266eefd | 360 | if (PACKET_remaining(&responder_id_list) > 0) { |
aff8c126 RS |
361 | s->ext.ocsp.ids = sk_OCSP_RESPID_new_null(); |
362 | if (s->ext.ocsp.ids == NULL) { | |
f63a17d6 MC |
363 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
364 | SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, ERR_R_MALLOC_FAILURE); | |
1266eefd MC |
365 | return 0; |
366 | } | |
367 | } else { | |
aff8c126 | 368 | s->ext.ocsp.ids = NULL; |
1266eefd | 369 | } |
25670f3e | 370 | |
1266eefd MC |
371 | while (PACKET_remaining(&responder_id_list) > 0) { |
372 | OCSP_RESPID *id; | |
373 | PACKET responder_id; | |
374 | const unsigned char *id_data; | |
25670f3e | 375 | |
1266eefd MC |
376 | if (!PACKET_get_length_prefixed_2(&responder_id_list, &responder_id) |
377 | || PACKET_remaining(&responder_id) == 0) { | |
f63a17d6 MC |
378 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
379 | SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, SSL_R_BAD_EXTENSION); | |
1266eefd MC |
380 | return 0; |
381 | } | |
25670f3e | 382 | |
1266eefd MC |
383 | id_data = PACKET_data(&responder_id); |
384 | /* TODO(size_t): Convert d2i_* to size_t */ | |
385 | id = d2i_OCSP_RESPID(NULL, &id_data, | |
386 | (int)PACKET_remaining(&responder_id)); | |
387 | if (id == NULL) { | |
f63a17d6 MC |
388 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
389 | SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, SSL_R_BAD_EXTENSION); | |
1266eefd | 390 | return 0; |
25670f3e MC |
391 | } |
392 | ||
1266eefd MC |
393 | if (id_data != PACKET_end(&responder_id)) { |
394 | OCSP_RESPID_free(id); | |
f63a17d6 MC |
395 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
396 | SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, SSL_R_BAD_EXTENSION); | |
397 | ||
25670f3e MC |
398 | return 0; |
399 | } | |
400 | ||
aff8c126 | 401 | if (!sk_OCSP_RESPID_push(s->ext.ocsp.ids, id)) { |
1266eefd | 402 | OCSP_RESPID_free(id); |
f63a17d6 MC |
403 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
404 | SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); | |
405 | ||
1266eefd MC |
406 | return 0; |
407 | } | |
408 | } | |
409 | ||
410 | /* Read in request_extensions */ | |
411 | if (!PACKET_as_length_prefixed_2(pkt, &exts)) { | |
f63a17d6 MC |
412 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
413 | SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, SSL_R_BAD_EXTENSION); | |
1266eefd MC |
414 | return 0; |
415 | } | |
416 | ||
417 | if (PACKET_remaining(&exts) > 0) { | |
418 | const unsigned char *ext_data = PACKET_data(&exts); | |
419 | ||
aff8c126 | 420 | sk_X509_EXTENSION_pop_free(s->ext.ocsp.exts, |
1266eefd | 421 | X509_EXTENSION_free); |
aff8c126 | 422 | s->ext.ocsp.exts = |
1266eefd | 423 | d2i_X509_EXTENSIONS(NULL, &ext_data, (int)PACKET_remaining(&exts)); |
aff8c126 | 424 | if (s->ext.ocsp.exts == NULL || ext_data != PACKET_end(&exts)) { |
f63a17d6 MC |
425 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
426 | SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, SSL_R_BAD_EXTENSION); | |
1266eefd | 427 | return 0; |
25670f3e | 428 | } |
25670f3e MC |
429 | } |
430 | ||
431 | return 1; | |
432 | } | |
ab83e314 | 433 | #endif |
25670f3e MC |
434 | |
435 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
61138358 | 436 | int tls_parse_ctos_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 437 | size_t chainidx) |
25670f3e | 438 | { |
1266eefd MC |
439 | /* |
440 | * We shouldn't accept this extension on a | |
441 | * renegotiation. | |
1266eefd | 442 | */ |
c7f47786 | 443 | if (SSL_IS_FIRST_HANDSHAKE(s)) |
aff8c126 | 444 | s->s3->npn_seen = 1; |
25670f3e MC |
445 | |
446 | return 1; | |
447 | } | |
448 | #endif | |
449 | ||
450 | /* | |
1266eefd | 451 | * Save the ALPN extension in a ClientHello.|pkt| holds the contents of the ALPN |
29bfd5b7 | 452 | * extension, not including type and length. Returns: 1 on success, 0 on error. |
25670f3e | 453 | */ |
61138358 | 454 | int tls_parse_ctos_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 455 | size_t chainidx) |
25670f3e MC |
456 | { |
457 | PACKET protocol_list, save_protocol_list, protocol; | |
458 | ||
c7f47786 | 459 | if (!SSL_IS_FIRST_HANDSHAKE(s)) |
25670f3e MC |
460 | return 1; |
461 | ||
462 | if (!PACKET_as_length_prefixed_2(pkt, &protocol_list) | |
463 | || PACKET_remaining(&protocol_list) < 2) { | |
f63a17d6 MC |
464 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_ALPN, |
465 | SSL_R_BAD_EXTENSION); | |
25670f3e MC |
466 | return 0; |
467 | } | |
468 | ||
469 | save_protocol_list = protocol_list; | |
470 | do { | |
471 | /* Protocol names can't be empty. */ | |
472 | if (!PACKET_get_length_prefixed_1(&protocol_list, &protocol) | |
473 | || PACKET_remaining(&protocol) == 0) { | |
f63a17d6 MC |
474 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_ALPN, |
475 | SSL_R_BAD_EXTENSION); | |
25670f3e MC |
476 | return 0; |
477 | } | |
478 | } while (PACKET_remaining(&protocol_list) != 0); | |
479 | ||
7d061fce MC |
480 | OPENSSL_free(s->s3->alpn_proposed); |
481 | s->s3->alpn_proposed = NULL; | |
482 | s->s3->alpn_proposed_len = 0; | |
25670f3e MC |
483 | if (!PACKET_memdup(&save_protocol_list, |
484 | &s->s3->alpn_proposed, &s->s3->alpn_proposed_len)) { | |
f63a17d6 MC |
485 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_ALPN, |
486 | ERR_R_INTERNAL_ERROR); | |
25670f3e MC |
487 | return 0; |
488 | } | |
489 | ||
490 | return 1; | |
491 | } | |
492 | ||
493 | #ifndef OPENSSL_NO_SRTP | |
61138358 | 494 | int tls_parse_ctos_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 495 | size_t chainidx) |
25670f3e | 496 | { |
25670f3e MC |
497 | STACK_OF(SRTP_PROTECTION_PROFILE) *srvr; |
498 | unsigned int ct, mki_len, id; | |
499 | int i, srtp_pref; | |
500 | PACKET subpkt; | |
501 | ||
502 | /* Ignore this if we have no SRTP profiles */ | |
503 | if (SSL_get_srtp_profiles(s) == NULL) | |
504 | return 1; | |
505 | ||
506 | /* Pull off the length of the cipher suite list and check it is even */ | |
1266eefd MC |
507 | if (!PACKET_get_net_2(pkt, &ct) || (ct & 1) != 0 |
508 | || !PACKET_get_sub_packet(pkt, &subpkt, ct)) { | |
f63a17d6 | 509 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_USE_SRTP, |
25670f3e | 510 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
25670f3e MC |
511 | return 0; |
512 | } | |
513 | ||
514 | srvr = SSL_get_srtp_profiles(s); | |
515 | s->srtp_profile = NULL; | |
516 | /* Search all profiles for a match initially */ | |
517 | srtp_pref = sk_SRTP_PROTECTION_PROFILE_num(srvr); | |
518 | ||
519 | while (PACKET_remaining(&subpkt)) { | |
520 | if (!PACKET_get_net_2(&subpkt, &id)) { | |
f63a17d6 MC |
521 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_USE_SRTP, |
522 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); | |
25670f3e MC |
523 | return 0; |
524 | } | |
525 | ||
526 | /* | |
527 | * Only look for match in profiles of higher preference than | |
528 | * current match. | |
529 | * If no profiles have been have been configured then this | |
530 | * does nothing. | |
531 | */ | |
532 | for (i = 0; i < srtp_pref; i++) { | |
d270de32 | 533 | SRTP_PROTECTION_PROFILE *sprof = |
1266eefd MC |
534 | sk_SRTP_PROTECTION_PROFILE_value(srvr, i); |
535 | ||
25670f3e MC |
536 | if (sprof->id == id) { |
537 | s->srtp_profile = sprof; | |
538 | srtp_pref = i; | |
539 | break; | |
540 | } | |
541 | } | |
542 | } | |
543 | ||
1266eefd | 544 | /* Now extract the MKI value as a sanity check, but discard it for now */ |
25670f3e | 545 | if (!PACKET_get_1(pkt, &mki_len)) { |
f63a17d6 MC |
546 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_USE_SRTP, |
547 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); | |
25670f3e MC |
548 | return 0; |
549 | } | |
550 | ||
551 | if (!PACKET_forward(pkt, mki_len) | |
552 | || PACKET_remaining(pkt)) { | |
f63a17d6 MC |
553 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_USE_SRTP, |
554 | SSL_R_BAD_SRTP_MKI_VALUE); | |
25670f3e MC |
555 | return 0; |
556 | } | |
557 | ||
558 | return 1; | |
559 | } | |
560 | #endif | |
561 | ||
61138358 | 562 | int tls_parse_ctos_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 563 | size_t chainidx) |
25670f3e MC |
564 | { |
565 | if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC)) | |
28a31a0a | 566 | s->ext.use_etm = 1; |
25670f3e MC |
567 | |
568 | return 1; | |
569 | } | |
570 | ||
b2f7e8c0 MC |
571 | /* |
572 | * Process a psk_kex_modes extension received in the ClientHello. |pkt| contains | |
573 | * the raw PACKET data for the extension. Returns 1 on success or 0 on failure. | |
b2f7e8c0 | 574 | */ |
61138358 | 575 | int tls_parse_ctos_psk_kex_modes(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 576 | X509 *x, size_t chainidx) |
b2f7e8c0 MC |
577 | { |
578 | #ifndef OPENSSL_NO_TLS1_3 | |
579 | PACKET psk_kex_modes; | |
580 | unsigned int mode; | |
581 | ||
582 | if (!PACKET_as_length_prefixed_1(pkt, &psk_kex_modes) | |
583 | || PACKET_remaining(&psk_kex_modes) == 0) { | |
f63a17d6 MC |
584 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_PSK_KEX_MODES, |
585 | SSL_R_BAD_EXTENSION); | |
b2f7e8c0 MC |
586 | return 0; |
587 | } | |
588 | ||
589 | while (PACKET_get_1(&psk_kex_modes, &mode)) { | |
590 | if (mode == TLSEXT_KEX_MODE_KE_DHE) | |
591 | s->ext.psk_kex_mode |= TLSEXT_KEX_MODE_FLAG_KE_DHE; | |
e3c0d76b MC |
592 | else if (mode == TLSEXT_KEX_MODE_KE |
593 | && (s->options & SSL_OP_ALLOW_NO_DHE_KEX) != 0) | |
b2f7e8c0 MC |
594 | s->ext.psk_kex_mode |= TLSEXT_KEX_MODE_FLAG_KE; |
595 | } | |
596 | #endif | |
597 | ||
598 | return 1; | |
599 | } | |
600 | ||
25670f3e MC |
601 | /* |
602 | * Process a key_share extension received in the ClientHello. |pkt| contains | |
603 | * the raw PACKET data for the extension. Returns 1 on success or 0 on failure. | |
25670f3e | 604 | */ |
61138358 | 605 | int tls_parse_ctos_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 606 | size_t chainidx) |
25670f3e | 607 | { |
3cf96e88 | 608 | #ifndef OPENSSL_NO_TLS1_3 |
25670f3e MC |
609 | unsigned int group_id; |
610 | PACKET key_share_list, encoded_pt; | |
f48d826e DSH |
611 | const uint16_t *clntgroups, *srvrgroups; |
612 | size_t clnt_num_groups, srvr_num_groups; | |
43b95d73 | 613 | int found = 0; |
25670f3e | 614 | |
f4bbb37c | 615 | if (s->hit && (s->ext.psk_kex_mode & TLSEXT_KEX_MODE_FLAG_KE_DHE) == 0) |
25670f3e MC |
616 | return 1; |
617 | ||
618 | /* Sanity check */ | |
619 | if (s->s3->peer_tmp != NULL) { | |
f63a17d6 MC |
620 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_KEY_SHARE, |
621 | ERR_R_INTERNAL_ERROR); | |
25670f3e MC |
622 | return 0; |
623 | } | |
624 | ||
625 | if (!PACKET_as_length_prefixed_2(pkt, &key_share_list)) { | |
f63a17d6 MC |
626 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_KEY_SHARE, |
627 | SSL_R_LENGTH_MISMATCH); | |
25670f3e MC |
628 | return 0; |
629 | } | |
630 | ||
f48d826e DSH |
631 | /* Get our list of supported groups */ |
632 | tls1_get_supported_groups(s, &srvrgroups, &srvr_num_groups); | |
633 | /* Get the clients list of supported groups. */ | |
634 | tls1_get_peer_groups(s, &clntgroups, &clnt_num_groups); | |
635 | if (clnt_num_groups == 0) { | |
b6fdc12d MC |
636 | /* |
637 | * This can only happen if the supported_groups extension was not sent, | |
638 | * because we verify that the length is non-zero when we process that | |
639 | * extension. | |
640 | */ | |
f63a17d6 MC |
641 | SSLfatal(s, SSL_AD_MISSING_EXTENSION, SSL_F_TLS_PARSE_CTOS_KEY_SHARE, |
642 | SSL_R_MISSING_SUPPORTED_GROUPS_EXTENSION); | |
b6fdc12d MC |
643 | return 0; |
644 | } | |
25670f3e | 645 | |
43054d3d MC |
646 | if (s->s3->group_id != 0 && PACKET_remaining(&key_share_list) == 0) { |
647 | /* | |
648 | * If we set a group_id already, then we must have sent an HRR | |
649 | * requesting a new key_share. If we haven't got one then that is an | |
650 | * error | |
651 | */ | |
652 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_CTOS_KEY_SHARE, | |
653 | SSL_R_BAD_KEY_SHARE); | |
654 | return 0; | |
655 | } | |
656 | ||
25670f3e MC |
657 | while (PACKET_remaining(&key_share_list) > 0) { |
658 | if (!PACKET_get_net_2(&key_share_list, &group_id) | |
659 | || !PACKET_get_length_prefixed_2(&key_share_list, &encoded_pt) | |
660 | || PACKET_remaining(&encoded_pt) == 0) { | |
f63a17d6 MC |
661 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_KEY_SHARE, |
662 | SSL_R_LENGTH_MISMATCH); | |
25670f3e MC |
663 | return 0; |
664 | } | |
665 | ||
666 | /* | |
667 | * If we already found a suitable key_share we loop through the | |
668 | * rest to verify the structure, but don't process them. | |
669 | */ | |
670 | if (found) | |
671 | continue; | |
672 | ||
43054d3d MC |
673 | /* |
674 | * If we sent an HRR then the key_share sent back MUST be for the group | |
675 | * we requested, and must be the only key_share sent. | |
676 | */ | |
677 | if (s->s3->group_id != 0 | |
678 | && (group_id != s->s3->group_id | |
679 | || PACKET_remaining(&key_share_list) != 0)) { | |
680 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, | |
681 | SSL_F_TLS_PARSE_CTOS_KEY_SHARE, SSL_R_BAD_KEY_SHARE); | |
682 | return 0; | |
683 | } | |
684 | ||
25670f3e | 685 | /* Check if this share is in supported_groups sent from client */ |
f48d826e | 686 | if (!check_in_list(s, group_id, clntgroups, clnt_num_groups, 0)) { |
f63a17d6 MC |
687 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
688 | SSL_F_TLS_PARSE_CTOS_KEY_SHARE, SSL_R_BAD_KEY_SHARE); | |
25670f3e MC |
689 | return 0; |
690 | } | |
691 | ||
692 | /* Check if this share is for a group we can use */ | |
f48d826e | 693 | if (!check_in_list(s, group_id, srvrgroups, srvr_num_groups, 1)) { |
25670f3e MC |
694 | /* Share not suitable */ |
695 | continue; | |
696 | } | |
697 | ||
612f9d22 | 698 | if ((s->s3->peer_tmp = ssl_generate_param_group(group_id)) == NULL) { |
f63a17d6 | 699 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_KEY_SHARE, |
25670f3e MC |
700 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
701 | return 0; | |
702 | } | |
703 | ||
25670f3e MC |
704 | s->s3->group_id = group_id; |
705 | ||
706 | if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp, | |
707 | PACKET_data(&encoded_pt), | |
708 | PACKET_remaining(&encoded_pt))) { | |
f63a17d6 MC |
709 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
710 | SSL_F_TLS_PARSE_CTOS_KEY_SHARE, SSL_R_BAD_ECPOINT); | |
25670f3e MC |
711 | return 0; |
712 | } | |
713 | ||
714 | found = 1; | |
715 | } | |
3cf96e88 | 716 | #endif |
25670f3e MC |
717 | |
718 | return 1; | |
719 | } | |
720 | ||
43054d3d MC |
721 | int tls_parse_ctos_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
722 | size_t chainidx) | |
723 | { | |
1aac20f5 | 724 | #ifndef OPENSSL_NO_TLS1_3 |
dd77962e | 725 | unsigned int format, version, key_share, group_id; |
43054d3d MC |
726 | EVP_MD_CTX *hctx; |
727 | EVP_PKEY *pkey; | |
728 | PACKET cookie, raw, chhash, appcookie; | |
729 | WPACKET hrrpkt; | |
730 | const unsigned char *data, *mdin, *ciphdata; | |
731 | unsigned char hmac[SHA256_DIGEST_LENGTH]; | |
732 | unsigned char hrr[MAX_HRR_SIZE]; | |
733 | size_t rawlen, hmaclen, hrrlen, ciphlen; | |
d0debc0a | 734 | unsigned long tm, now; |
43054d3d MC |
735 | |
736 | /* Ignore any cookie if we're not set up to verify it */ | |
3fa2812f | 737 | if (s->ctx->verify_stateless_cookie_cb == NULL |
43054d3d MC |
738 | || (s->s3->flags & TLS1_FLAGS_STATELESS) == 0) |
739 | return 1; | |
740 | ||
741 | if (!PACKET_as_length_prefixed_2(pkt, &cookie)) { | |
742 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
743 | SSL_R_LENGTH_MISMATCH); | |
744 | return 0; | |
745 | } | |
746 | ||
747 | raw = cookie; | |
748 | data = PACKET_data(&raw); | |
749 | rawlen = PACKET_remaining(&raw); | |
750 | if (rawlen < SHA256_DIGEST_LENGTH | |
751 | || !PACKET_forward(&raw, rawlen - SHA256_DIGEST_LENGTH)) { | |
752 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
753 | SSL_R_LENGTH_MISMATCH); | |
754 | return 0; | |
755 | } | |
756 | mdin = PACKET_data(&raw); | |
757 | ||
758 | /* Verify the HMAC of the cookie */ | |
759 | hctx = EVP_MD_CTX_create(); | |
f929439f MC |
760 | pkey = EVP_PKEY_new_raw_private_key(EVP_PKEY_HMAC, NULL, |
761 | s->session_ctx->ext.cookie_hmac_key, | |
762 | sizeof(s->session_ctx->ext | |
763 | .cookie_hmac_key)); | |
43054d3d MC |
764 | if (hctx == NULL || pkey == NULL) { |
765 | EVP_MD_CTX_free(hctx); | |
766 | EVP_PKEY_free(pkey); | |
767 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
768 | ERR_R_MALLOC_FAILURE); | |
769 | return 0; | |
770 | } | |
771 | ||
97ea1e7f | 772 | hmaclen = SHA256_DIGEST_LENGTH; |
43054d3d | 773 | if (EVP_DigestSignInit(hctx, NULL, EVP_sha256(), NULL, pkey) <= 0 |
97ea1e7f MC |
774 | || EVP_DigestSign(hctx, hmac, &hmaclen, data, |
775 | rawlen - SHA256_DIGEST_LENGTH) <= 0 | |
43054d3d MC |
776 | || hmaclen != SHA256_DIGEST_LENGTH) { |
777 | EVP_MD_CTX_free(hctx); | |
778 | EVP_PKEY_free(pkey); | |
779 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
780 | ERR_R_INTERNAL_ERROR); | |
781 | return 0; | |
782 | } | |
783 | ||
784 | EVP_MD_CTX_free(hctx); | |
785 | EVP_PKEY_free(pkey); | |
786 | ||
787 | if (CRYPTO_memcmp(hmac, mdin, SHA256_DIGEST_LENGTH) != 0) { | |
788 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
789 | SSL_R_COOKIE_MISMATCH); | |
790 | return 0; | |
791 | } | |
792 | ||
793 | if (!PACKET_get_net_2(&cookie, &format)) { | |
794 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
795 | SSL_R_LENGTH_MISMATCH); | |
796 | return 0; | |
797 | } | |
798 | /* Check the cookie format is something we recognise. Ignore it if not */ | |
799 | if (format != COOKIE_STATE_FORMAT_VERSION) | |
800 | return 1; | |
801 | ||
802 | /* | |
803 | * The rest of these checks really shouldn't fail since we have verified the | |
804 | * HMAC above. | |
805 | */ | |
806 | ||
807 | /* Check the version number is sane */ | |
808 | if (!PACKET_get_net_2(&cookie, &version)) { | |
809 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
810 | SSL_R_LENGTH_MISMATCH); | |
811 | return 0; | |
812 | } | |
813 | if (version != TLS1_3_VERSION) { | |
814 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
815 | SSL_R_BAD_PROTOCOL_VERSION_NUMBER); | |
816 | return 0; | |
817 | } | |
818 | ||
dd77962e | 819 | if (!PACKET_get_net_2(&cookie, &group_id)) { |
43054d3d MC |
820 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, |
821 | SSL_R_LENGTH_MISMATCH); | |
822 | return 0; | |
823 | } | |
dd77962e | 824 | |
43054d3d MC |
825 | ciphdata = PACKET_data(&cookie); |
826 | if (!PACKET_forward(&cookie, 2)) { | |
827 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
828 | SSL_R_LENGTH_MISMATCH); | |
829 | return 0; | |
830 | } | |
dd77962e MC |
831 | if (group_id != s->s3->group_id |
832 | || s->s3->tmp.new_cipher | |
833 | != ssl_get_cipher_by_char(s, ciphdata, 0)) { | |
834 | /* | |
835 | * We chose a different cipher or group id this time around to what is | |
836 | * in the cookie. Something must have changed. | |
837 | */ | |
838 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
839 | SSL_R_BAD_CIPHER); | |
43054d3d MC |
840 | return 0; |
841 | } | |
842 | ||
843 | if (!PACKET_get_1(&cookie, &key_share) | |
d0debc0a | 844 | || !PACKET_get_net_4(&cookie, &tm) |
43054d3d MC |
845 | || !PACKET_get_length_prefixed_2(&cookie, &chhash) |
846 | || !PACKET_get_length_prefixed_1(&cookie, &appcookie) | |
847 | || PACKET_remaining(&cookie) != SHA256_DIGEST_LENGTH) { | |
848 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
849 | SSL_R_LENGTH_MISMATCH); | |
850 | return 0; | |
851 | } | |
852 | ||
d0debc0a MC |
853 | /* We tolerate a cookie age of up to 10 minutes (= 60 * 10 seconds) */ |
854 | now = (unsigned long)time(NULL); | |
855 | if (tm > now || (now - tm) > 600) { | |
856 | /* Cookie is stale. Ignore it */ | |
857 | return 1; | |
858 | } | |
859 | ||
43054d3d | 860 | /* Verify the app cookie */ |
3fa2812f | 861 | if (s->ctx->verify_stateless_cookie_cb(s, PACKET_data(&appcookie), |
43054d3d MC |
862 | PACKET_remaining(&appcookie)) == 0) { |
863 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
864 | SSL_R_COOKIE_MISMATCH); | |
865 | return 0; | |
866 | } | |
867 | ||
868 | /* | |
869 | * Reconstruct the HRR that we would have sent in response to the original | |
870 | * ClientHello so we can add it to the transcript hash. | |
871 | * Note: This won't work with custom HRR extensions | |
872 | */ | |
873 | if (!WPACKET_init_static_len(&hrrpkt, hrr, sizeof(hrr), 0)) { | |
874 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
875 | ERR_R_INTERNAL_ERROR); | |
876 | return 0; | |
877 | } | |
878 | if (!WPACKET_put_bytes_u8(&hrrpkt, SSL3_MT_SERVER_HELLO) | |
879 | || !WPACKET_start_sub_packet_u24(&hrrpkt) | |
880 | || !WPACKET_put_bytes_u16(&hrrpkt, TLS1_2_VERSION) | |
881 | || !WPACKET_memcpy(&hrrpkt, hrrrandom, SSL3_RANDOM_SIZE) | |
882 | || !WPACKET_sub_memcpy_u8(&hrrpkt, s->tmp_session_id, | |
883 | s->tmp_session_id_len) | |
884 | || !s->method->put_cipher_by_char(s->s3->tmp.new_cipher, &hrrpkt, | |
885 | &ciphlen) | |
886 | || !WPACKET_put_bytes_u8(&hrrpkt, 0) | |
887 | || !WPACKET_start_sub_packet_u16(&hrrpkt)) { | |
888 | WPACKET_cleanup(&hrrpkt); | |
889 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
890 | ERR_R_INTERNAL_ERROR); | |
891 | return 0; | |
892 | } | |
893 | if (!WPACKET_put_bytes_u16(&hrrpkt, TLSEXT_TYPE_supported_versions) | |
894 | || !WPACKET_start_sub_packet_u16(&hrrpkt) | |
895 | /* TODO(TLS1.3): Fix this before release */ | |
73cc84a1 | 896 | || !WPACKET_put_bytes_u16(&hrrpkt, s->version_draft) |
43054d3d MC |
897 | || !WPACKET_close(&hrrpkt)) { |
898 | WPACKET_cleanup(&hrrpkt); | |
899 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
900 | ERR_R_INTERNAL_ERROR); | |
901 | return 0; | |
902 | } | |
903 | if (key_share) { | |
904 | if (!WPACKET_put_bytes_u16(&hrrpkt, TLSEXT_TYPE_key_share) | |
905 | || !WPACKET_start_sub_packet_u16(&hrrpkt) | |
906 | || !WPACKET_put_bytes_u16(&hrrpkt, s->s3->group_id) | |
907 | || !WPACKET_close(&hrrpkt)) { | |
908 | WPACKET_cleanup(&hrrpkt); | |
909 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
910 | ERR_R_INTERNAL_ERROR); | |
911 | return 0; | |
912 | } | |
913 | } | |
914 | if (!WPACKET_put_bytes_u16(&hrrpkt, TLSEXT_TYPE_cookie) | |
915 | || !WPACKET_start_sub_packet_u16(&hrrpkt) | |
916 | || !WPACKET_sub_memcpy_u16(&hrrpkt, data, rawlen) | |
917 | || !WPACKET_close(&hrrpkt) /* cookie extension */ | |
918 | || !WPACKET_close(&hrrpkt) /* extension block */ | |
919 | || !WPACKET_close(&hrrpkt) /* message */ | |
920 | || !WPACKET_get_total_written(&hrrpkt, &hrrlen) | |
921 | || !WPACKET_finish(&hrrpkt)) { | |
922 | WPACKET_cleanup(&hrrpkt); | |
923 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
924 | ERR_R_INTERNAL_ERROR); | |
925 | return 0; | |
926 | } | |
927 | ||
928 | /* Reconstruct the transcript hash */ | |
929 | if (!create_synthetic_message_hash(s, PACKET_data(&chhash), | |
930 | PACKET_remaining(&chhash), hrr, | |
931 | hrrlen)) { | |
932 | /* SSLfatal() already called */ | |
933 | return 0; | |
934 | } | |
935 | ||
936 | /* Act as if this ClientHello came after a HelloRetryRequest */ | |
937 | s->hello_retry_request = 1; | |
938 | ||
c36001c3 | 939 | s->ext.cookieok = 1; |
1aac20f5 | 940 | #endif |
c36001c3 | 941 | |
43054d3d MC |
942 | return 1; |
943 | } | |
944 | ||
25670f3e | 945 | #ifndef OPENSSL_NO_EC |
61138358 | 946 | int tls_parse_ctos_supported_groups(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 947 | X509 *x, size_t chainidx) |
25670f3e MC |
948 | { |
949 | PACKET supported_groups_list; | |
950 | ||
951 | /* Each group is 2 bytes and we must have at least 1. */ | |
952 | if (!PACKET_as_length_prefixed_2(pkt, &supported_groups_list) | |
953 | || PACKET_remaining(&supported_groups_list) == 0 | |
954 | || (PACKET_remaining(&supported_groups_list) % 2) != 0) { | |
f63a17d6 MC |
955 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
956 | SSL_F_TLS_PARSE_CTOS_SUPPORTED_GROUPS, SSL_R_BAD_EXTENSION); | |
25670f3e MC |
957 | return 0; |
958 | } | |
959 | ||
e3743355 BK |
960 | if (!s->hit || SSL_IS_TLS13(s)) { |
961 | OPENSSL_free(s->session->ext.supportedgroups); | |
962 | s->session->ext.supportedgroups = NULL; | |
963 | s->session->ext.supportedgroups_len = 0; | |
9e84a42d | 964 | if (!tls1_save_u16(&supported_groups_list, |
e3743355 BK |
965 | &s->session->ext.supportedgroups, |
966 | &s->session->ext.supportedgroups_len)) { | |
f63a17d6 MC |
967 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
968 | SSL_F_TLS_PARSE_CTOS_SUPPORTED_GROUPS, | |
969 | ERR_R_INTERNAL_ERROR); | |
e3743355 BK |
970 | return 0; |
971 | } | |
25670f3e MC |
972 | } |
973 | ||
974 | return 1; | |
975 | } | |
976 | #endif | |
977 | ||
61138358 | 978 | int tls_parse_ctos_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 979 | size_t chainidx) |
25670f3e MC |
980 | { |
981 | /* The extension must always be empty */ | |
982 | if (PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
983 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
984 | SSL_F_TLS_PARSE_CTOS_EMS, SSL_R_BAD_EXTENSION); | |
25670f3e MC |
985 | return 0; |
986 | } | |
987 | ||
988 | s->s3->flags |= TLS1_FLAGS_RECEIVED_EXTMS; | |
989 | ||
990 | return 1; | |
991 | } | |
7da160b0 | 992 | |
38df5a45 MC |
993 | |
994 | int tls_parse_ctos_early_data(SSL *s, PACKET *pkt, unsigned int context, | |
f63a17d6 | 995 | X509 *x, size_t chainidx) |
38df5a45 MC |
996 | { |
997 | if (PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
998 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
999 | SSL_F_TLS_PARSE_CTOS_EARLY_DATA, SSL_R_BAD_EXTENSION); | |
38df5a45 MC |
1000 | return 0; |
1001 | } | |
1002 | ||
fc7129dc | 1003 | if (s->hello_retry_request != SSL_HRR_NONE) { |
f63a17d6 MC |
1004 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1005 | SSL_F_TLS_PARSE_CTOS_EARLY_DATA, SSL_R_BAD_EXTENSION); | |
d4504fe5 MC |
1006 | return 0; |
1007 | } | |
1008 | ||
38df5a45 MC |
1009 | return 1; |
1010 | } | |
1011 | ||
6cc0b3c2 MC |
1012 | static SSL_TICKET_STATUS tls_get_stateful_ticket(SSL *s, PACKET *tick, |
1013 | SSL_SESSION **sess) | |
1014 | { | |
1015 | SSL_SESSION *tmpsess = NULL; | |
1016 | ||
1017 | switch (PACKET_remaining(tick)) { | |
1018 | case 0: | |
1019 | return SSL_TICKET_EMPTY; | |
1020 | ||
1021 | case SSL_MAX_SSL_SESSION_ID_LENGTH: | |
1022 | break; | |
1023 | ||
1024 | default: | |
1025 | return SSL_TICKET_NO_DECRYPT; | |
1026 | } | |
1027 | ||
1028 | tmpsess = lookup_sess_in_cache(s, PACKET_data(tick), | |
1029 | SSL_MAX_SSL_SESSION_ID_LENGTH); | |
1030 | ||
1031 | if (tmpsess == NULL) | |
1032 | return SSL_TICKET_NO_DECRYPT; | |
1033 | ||
1034 | s->ext.ticket_expected = 1; | |
1035 | *sess = tmpsess; | |
1036 | return SSL_TICKET_SUCCESS; | |
1037 | } | |
1038 | ||
61138358 | 1039 | int tls_parse_ctos_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1040 | size_t chainidx) |
1053a6e2 MC |
1041 | { |
1042 | PACKET identities, binders, binder; | |
1043 | size_t binderoffset, hashsize; | |
1044 | SSL_SESSION *sess = NULL; | |
3a7c56b2 | 1045 | unsigned int id, i, ext = 0; |
1053a6e2 MC |
1046 | const EVP_MD *md = NULL; |
1047 | ||
1a9f457c MC |
1048 | /* |
1049 | * If we have no PSK kex mode that we recognise then we can't resume so | |
1050 | * ignore this extension | |
1051 | */ | |
1052 | if ((s->ext.psk_kex_mode | |
1053 | & (TLSEXT_KEX_MODE_FLAG_KE | TLSEXT_KEX_MODE_FLAG_KE_DHE)) == 0) | |
1054 | return 1; | |
1055 | ||
1053a6e2 | 1056 | if (!PACKET_get_length_prefixed_2(pkt, &identities)) { |
f63a17d6 MC |
1057 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
1058 | SSL_F_TLS_PARSE_CTOS_PSK, SSL_R_BAD_EXTENSION); | |
1053a6e2 MC |
1059 | return 0; |
1060 | } | |
1061 | ||
61fb5923 | 1062 | s->ext.ticket_expected = 0; |
1053a6e2 MC |
1063 | for (id = 0; PACKET_remaining(&identities) != 0; id++) { |
1064 | PACKET identity; | |
2c604cb9 | 1065 | unsigned long ticket_agel; |
f3d40db1 | 1066 | size_t idlen; |
1053a6e2 MC |
1067 | |
1068 | if (!PACKET_get_length_prefixed_2(&identities, &identity) | |
2c604cb9 | 1069 | || !PACKET_get_net_4(&identities, &ticket_agel)) { |
f63a17d6 MC |
1070 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
1071 | SSL_F_TLS_PARSE_CTOS_PSK, SSL_R_BAD_EXTENSION); | |
1053a6e2 MC |
1072 | return 0; |
1073 | } | |
1074 | ||
f3d40db1 | 1075 | idlen = PACKET_remaining(&identity); |
3a7c56b2 | 1076 | if (s->psk_find_session_cb != NULL |
f3d40db1 | 1077 | && !s->psk_find_session_cb(s, PACKET_data(&identity), idlen, |
011d768a | 1078 | &sess)) { |
f63a17d6 MC |
1079 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1080 | SSL_F_TLS_PARSE_CTOS_PSK, SSL_R_BAD_EXTENSION); | |
011d768a MC |
1081 | return 0; |
1082 | } | |
1083 | ||
c2b290c3 | 1084 | #ifndef OPENSSL_NO_PSK |
f3d40db1 MC |
1085 | if(sess == NULL |
1086 | && s->psk_server_callback != NULL | |
1087 | && idlen <= PSK_MAX_IDENTITY_LEN) { | |
1088 | char *pskid = NULL; | |
1089 | unsigned char pskdata[PSK_MAX_PSK_LEN]; | |
1090 | unsigned int pskdatalen; | |
1091 | ||
1092 | if (!PACKET_strndup(&identity, &pskid)) { | |
1093 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_PSK, | |
1094 | ERR_R_INTERNAL_ERROR); | |
1095 | return 0; | |
1096 | } | |
1097 | pskdatalen = s->psk_server_callback(s, pskid, pskdata, | |
1098 | sizeof(pskdata)); | |
1099 | OPENSSL_free(pskid); | |
1100 | if (pskdatalen > PSK_MAX_PSK_LEN) { | |
1101 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_PSK, | |
1102 | ERR_R_INTERNAL_ERROR); | |
1103 | return 0; | |
1104 | } else if (pskdatalen > 0) { | |
1105 | const SSL_CIPHER *cipher; | |
1106 | const unsigned char tls13_aes128gcmsha256_id[] = { 0x13, 0x01 }; | |
1107 | ||
1108 | /* | |
1109 | * We found a PSK using an old style callback. We don't know | |
1110 | * the digest so we default to SHA256 as per the TLSv1.3 spec | |
1111 | */ | |
1112 | cipher = SSL_CIPHER_find(s, tls13_aes128gcmsha256_id); | |
1113 | if (cipher == NULL) { | |
1114 | OPENSSL_cleanse(pskdata, pskdatalen); | |
1115 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_PSK, | |
1116 | ERR_R_INTERNAL_ERROR); | |
1117 | return 0; | |
1118 | } | |
1119 | ||
1120 | sess = SSL_SESSION_new(); | |
1121 | if (sess == NULL | |
1122 | || !SSL_SESSION_set1_master_key(sess, pskdata, | |
1123 | pskdatalen) | |
1124 | || !SSL_SESSION_set_cipher(sess, cipher) | |
1125 | || !SSL_SESSION_set_protocol_version(sess, | |
1126 | TLS1_3_VERSION)) { | |
1127 | OPENSSL_cleanse(pskdata, pskdatalen); | |
1128 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_PSK, | |
1129 | ERR_R_INTERNAL_ERROR); | |
1130 | goto err; | |
1131 | } | |
1132 | OPENSSL_cleanse(pskdata, pskdatalen); | |
1133 | } | |
1134 | } | |
c2b290c3 | 1135 | #endif /* OPENSSL_NO_PSK */ |
f3d40db1 | 1136 | |
011d768a MC |
1137 | if (sess != NULL) { |
1138 | /* We found a PSK */ | |
3a7c56b2 | 1139 | SSL_SESSION *sesstmp = ssl_session_dup(sess, 0); |
1b8bacff | 1140 | |
3a7c56b2 | 1141 | if (sesstmp == NULL) { |
f63a17d6 MC |
1142 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1143 | SSL_F_TLS_PARSE_CTOS_PSK, ERR_R_INTERNAL_ERROR); | |
3a7c56b2 MC |
1144 | return 0; |
1145 | } | |
1146 | SSL_SESSION_free(sess); | |
1147 | sess = sesstmp; | |
1148 | ||
1149 | /* | |
1150 | * We've just been told to use this session for this context so | |
1151 | * make sure the sid_ctx matches up. | |
1152 | */ | |
1153 | memcpy(sess->sid_ctx, s->sid_ctx, s->sid_ctx_length); | |
1154 | sess->sid_ctx_length = s->sid_ctx_length; | |
1155 | ext = 1; | |
630369d9 MC |
1156 | if (id == 0) |
1157 | s->ext.early_data_ok = 1; | |
3a7c56b2 MC |
1158 | } else { |
1159 | uint32_t ticket_age = 0, now, agesec, agems; | |
61fb5923 MC |
1160 | int ret; |
1161 | ||
e880d4e5 MC |
1162 | /* |
1163 | * If we are using anti-replay protection then we behave as if | |
1164 | * SSL_OP_NO_TICKET is set - we are caching tickets anyway so there | |
1165 | * is no point in using full stateless tickets. | |
1166 | */ | |
1167 | if ((s->options & SSL_OP_NO_TICKET) != 0 | |
5d263fb7 MC |
1168 | || (s->max_early_data > 0 |
1169 | && (s->options & SSL_OP_NO_ANTI_REPLAY) == 0)) | |
6cc0b3c2 MC |
1170 | ret = tls_get_stateful_ticket(s, &identity, &sess); |
1171 | else | |
1172 | ret = tls_decrypt_ticket(s, PACKET_data(&identity), | |
1173 | PACKET_remaining(&identity), NULL, 0, | |
1174 | &sess); | |
61fb5923 MC |
1175 | |
1176 | if (ret == SSL_TICKET_EMPTY) { | |
1177 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_PSK, | |
1178 | SSL_R_BAD_EXTENSION); | |
1179 | return 0; | |
1180 | } | |
3a7c56b2 | 1181 | |
df0fed9a TS |
1182 | if (ret == SSL_TICKET_FATAL_ERR_MALLOC |
1183 | || ret == SSL_TICKET_FATAL_ERR_OTHER) { | |
f63a17d6 MC |
1184 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1185 | SSL_F_TLS_PARSE_CTOS_PSK, ERR_R_INTERNAL_ERROR); | |
3a7c56b2 MC |
1186 | return 0; |
1187 | } | |
61fb5923 | 1188 | if (ret == SSL_TICKET_NONE || ret == SSL_TICKET_NO_DECRYPT) |
3a7c56b2 MC |
1189 | continue; |
1190 | ||
66d7de16 MC |
1191 | /* Check for replay */ |
1192 | if (s->max_early_data > 0 | |
5d263fb7 | 1193 | && (s->options & SSL_OP_NO_ANTI_REPLAY) == 0 |
66d7de16 MC |
1194 | && !SSL_CTX_remove_session(s->session_ctx, sess)) { |
1195 | SSL_SESSION_free(sess); | |
1196 | sess = NULL; | |
1197 | continue; | |
1198 | } | |
1199 | ||
3a7c56b2 MC |
1200 | ticket_age = (uint32_t)ticket_agel; |
1201 | now = (uint32_t)time(NULL); | |
1202 | agesec = now - (uint32_t)sess->time; | |
1203 | agems = agesec * (uint32_t)1000; | |
1204 | ticket_age -= sess->ext.tick_age_add; | |
1205 | ||
1206 | /* | |
1207 | * For simplicity we do our age calculations in seconds. If the | |
1208 | * client does it in ms then it could appear that their ticket age | |
1209 | * is longer than ours (our ticket age calculation should always be | |
1210 | * slightly longer than the client's due to the network latency). | |
1211 | * Therefore we add 1000ms to our age calculation to adjust for | |
1212 | * rounding errors. | |
1213 | */ | |
630369d9 MC |
1214 | if (id == 0 |
1215 | && sess->timeout >= (long)agesec | |
3a7c56b2 MC |
1216 | && agems / (uint32_t)1000 == agesec |
1217 | && ticket_age <= agems + 1000 | |
1218 | && ticket_age + TICKET_AGE_ALLOWANCE >= agems + 1000) { | |
1219 | /* | |
1220 | * Ticket age is within tolerance and not expired. We allow it | |
1221 | * for early data | |
1222 | */ | |
1223 | s->ext.early_data_ok = 1; | |
1224 | } | |
1053a6e2 | 1225 | } |
1053a6e2 | 1226 | |
534a43ff | 1227 | md = ssl_md(sess->cipher->algorithm2); |
0de6d66d MC |
1228 | if (md != ssl_md(s->s3->tmp.new_cipher->algorithm2)) { |
1229 | /* The ciphersuite is not compatible with this session. */ | |
1053a6e2 MC |
1230 | SSL_SESSION_free(sess); |
1231 | sess = NULL; | |
630369d9 | 1232 | s->ext.early_data_ok = 0; |
1053a6e2 MC |
1233 | continue; |
1234 | } | |
1053a6e2 MC |
1235 | break; |
1236 | } | |
1237 | ||
1238 | if (sess == NULL) | |
1239 | return 1; | |
1240 | ||
1241 | binderoffset = PACKET_data(pkt) - (const unsigned char *)s->init_buf->data; | |
1053a6e2 MC |
1242 | hashsize = EVP_MD_size(md); |
1243 | ||
1244 | if (!PACKET_get_length_prefixed_2(pkt, &binders)) { | |
f63a17d6 MC |
1245 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_PSK, |
1246 | SSL_R_BAD_EXTENSION); | |
1053a6e2 MC |
1247 | goto err; |
1248 | } | |
1249 | ||
1250 | for (i = 0; i <= id; i++) { | |
1251 | if (!PACKET_get_length_prefixed_1(&binders, &binder)) { | |
f63a17d6 MC |
1252 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_PSK, |
1253 | SSL_R_BAD_EXTENSION); | |
1053a6e2 MC |
1254 | goto err; |
1255 | } | |
1256 | } | |
1257 | ||
2894e9cb MC |
1258 | if (PACKET_remaining(&binder) != hashsize) { |
1259 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_PSK, | |
1260 | SSL_R_BAD_EXTENSION); | |
1261 | goto err; | |
1262 | } | |
1263 | if (tls_psk_do_binder(s, md, (const unsigned char *)s->init_buf->data, | |
1264 | binderoffset, PACKET_data(&binder), NULL, sess, 0, | |
1265 | ext) != 1) { | |
635c8f77 | 1266 | /* SSLfatal() already called */ |
1053a6e2 MC |
1267 | goto err; |
1268 | } | |
1269 | ||
1270 | sess->ext.tick_identity = id; | |
2c604cb9 | 1271 | |
1053a6e2 MC |
1272 | SSL_SESSION_free(s->session); |
1273 | s->session = sess; | |
1053a6e2 MC |
1274 | return 1; |
1275 | err: | |
312e9387 | 1276 | SSL_SESSION_free(sess); |
1053a6e2 MC |
1277 | return 0; |
1278 | } | |
1279 | ||
9d75dce3 TS |
1280 | int tls_parse_ctos_post_handshake_auth(SSL *s, PACKET *pkt, unsigned int context, |
1281 | X509 *x, size_t chainidx) | |
1282 | { | |
1283 | if (PACKET_remaining(pkt) != 0) { | |
1284 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_POST_HANDSHAKE_AUTH, | |
1285 | SSL_R_POST_HANDSHAKE_AUTH_ENCODING_ERR); | |
1286 | return 0; | |
1287 | } | |
1288 | ||
1289 | s->post_handshake_auth = SSL_PHA_EXT_RECEIVED; | |
1290 | ||
1291 | return 1; | |
1292 | } | |
1293 | ||
1266eefd MC |
1294 | /* |
1295 | * Add the server's renegotiation binding | |
1296 | */ | |
b186a592 MC |
1297 | EXT_RETURN tls_construct_stoc_renegotiate(SSL *s, WPACKET *pkt, |
1298 | unsigned int context, X509 *x, | |
f63a17d6 | 1299 | size_t chainidx) |
7da160b0 MC |
1300 | { |
1301 | if (!s->s3->send_connection_binding) | |
b186a592 | 1302 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 1303 | |
db0f35dd | 1304 | /* Still add this even if SSL_OP_NO_RENEGOTIATION is set */ |
7da160b0 MC |
1305 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_renegotiate) |
1306 | || !WPACKET_start_sub_packet_u16(pkt) | |
1307 | || !WPACKET_start_sub_packet_u8(pkt) | |
1308 | || !WPACKET_memcpy(pkt, s->s3->previous_client_finished, | |
1309 | s->s3->previous_client_finished_len) | |
1310 | || !WPACKET_memcpy(pkt, s->s3->previous_server_finished, | |
1311 | s->s3->previous_server_finished_len) | |
1312 | || !WPACKET_close(pkt) | |
1313 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
1314 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_RENEGOTIATE, |
1315 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1316 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1317 | } |
1318 | ||
b186a592 | 1319 | return EXT_RETURN_SENT; |
7da160b0 MC |
1320 | } |
1321 | ||
b186a592 MC |
1322 | EXT_RETURN tls_construct_stoc_server_name(SSL *s, WPACKET *pkt, |
1323 | unsigned int context, X509 *x, | |
f63a17d6 | 1324 | size_t chainidx) |
7da160b0 MC |
1325 | { |
1326 | if (s->hit || s->servername_done != 1 | |
aff8c126 | 1327 | || s->session->ext.hostname == NULL) |
b186a592 | 1328 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1329 | |
1330 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_server_name) | |
1331 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
f63a17d6 MC |
1332 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_SERVER_NAME, |
1333 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1334 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1335 | } |
1336 | ||
b186a592 | 1337 | return EXT_RETURN_SENT; |
7da160b0 MC |
1338 | } |
1339 | ||
cf72c757 F |
1340 | /* Add/include the server's max fragment len extension into ServerHello */ |
1341 | EXT_RETURN tls_construct_stoc_maxfragmentlen(SSL *s, WPACKET *pkt, | |
1342 | unsigned int context, X509 *x, | |
f63a17d6 | 1343 | size_t chainidx) |
cf72c757 F |
1344 | { |
1345 | if (!USE_MAX_FRAGMENT_LENGTH_EXT(s->session)) | |
1346 | return EXT_RETURN_NOT_SENT; | |
1347 | ||
1348 | /*- | |
1349 | * 4 bytes for this extension type and extension length | |
1350 | * 1 byte for the Max Fragment Length code value. | |
1351 | */ | |
1352 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_max_fragment_length) | |
1353 | || !WPACKET_start_sub_packet_u16(pkt) | |
1354 | || !WPACKET_put_bytes_u8(pkt, s->session->ext.max_fragment_len_mode) | |
1355 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
1356 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1357 | SSL_F_TLS_CONSTRUCT_STOC_MAXFRAGMENTLEN, ERR_R_INTERNAL_ERROR); | |
cf72c757 F |
1358 | return EXT_RETURN_FAIL; |
1359 | } | |
1360 | ||
1361 | return EXT_RETURN_SENT; | |
1362 | } | |
1363 | ||
7da160b0 | 1364 | #ifndef OPENSSL_NO_EC |
b186a592 MC |
1365 | EXT_RETURN tls_construct_stoc_ec_pt_formats(SSL *s, WPACKET *pkt, |
1366 | unsigned int context, X509 *x, | |
f63a17d6 | 1367 | size_t chainidx) |
7da160b0 MC |
1368 | { |
1369 | unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
1370 | unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
89247375 | 1371 | int using_ecc = ((alg_k & SSL_kECDHE) || (alg_a & SSL_aECDSA)) |
aff8c126 | 1372 | && (s->session->ext.ecpointformats != NULL); |
7da160b0 MC |
1373 | const unsigned char *plist; |
1374 | size_t plistlen; | |
1375 | ||
1376 | if (!using_ecc) | |
b186a592 | 1377 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1378 | |
1379 | tls1_get_formatlist(s, &plist, &plistlen); | |
7da160b0 MC |
1380 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_ec_point_formats) |
1381 | || !WPACKET_start_sub_packet_u16(pkt) | |
1382 | || !WPACKET_sub_memcpy_u8(pkt, plist, plistlen) | |
1383 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
1384 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1385 | SSL_F_TLS_CONSTRUCT_STOC_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1386 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1387 | } |
1388 | ||
b186a592 | 1389 | return EXT_RETURN_SENT; |
7da160b0 MC |
1390 | } |
1391 | #endif | |
1392 | ||
cf53cbea | 1393 | #ifndef OPENSSL_NO_EC |
b186a592 MC |
1394 | EXT_RETURN tls_construct_stoc_supported_groups(SSL *s, WPACKET *pkt, |
1395 | unsigned int context, X509 *x, | |
f63a17d6 | 1396 | size_t chainidx) |
6af87546 | 1397 | { |
9e84a42d | 1398 | const uint16_t *groups; |
6af87546 MC |
1399 | size_t numgroups, i, first = 1; |
1400 | ||
1401 | /* s->s3->group_id is non zero if we accepted a key_share */ | |
1402 | if (s->s3->group_id == 0) | |
b186a592 | 1403 | return EXT_RETURN_NOT_SENT; |
6af87546 MC |
1404 | |
1405 | /* Get our list of supported groups */ | |
ff6d20a6 | 1406 | tls1_get_supported_groups(s, &groups, &numgroups); |
34e5292c | 1407 | if (numgroups == 0) { |
f63a17d6 MC |
1408 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1409 | SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1410 | return EXT_RETURN_FAIL; |
6af87546 MC |
1411 | } |
1412 | ||
1413 | /* Copy group ID if supported */ | |
9e84a42d DSH |
1414 | for (i = 0; i < numgroups; i++) { |
1415 | uint16_t group = groups[i]; | |
1416 | ||
1417 | if (tls_curve_allowed(s, group, SSL_SECOP_CURVE_SUPPORTED)) { | |
6af87546 MC |
1418 | if (first) { |
1419 | /* | |
1420 | * Check if the client is already using our preferred group. If | |
1421 | * so we don't need to add this extension | |
1422 | */ | |
9e84a42d | 1423 | if (s->s3->group_id == group) |
b186a592 | 1424 | return EXT_RETURN_NOT_SENT; |
6af87546 MC |
1425 | |
1426 | /* Add extension header */ | |
1427 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_groups) | |
1428 | /* Sub-packet for supported_groups extension */ | |
1429 | || !WPACKET_start_sub_packet_u16(pkt) | |
1430 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
f63a17d6 MC |
1431 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1432 | SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS, | |
1433 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1434 | return EXT_RETURN_FAIL; |
6af87546 MC |
1435 | } |
1436 | ||
1437 | first = 0; | |
1438 | } | |
9e84a42d | 1439 | if (!WPACKET_put_bytes_u16(pkt, group)) { |
f63a17d6 MC |
1440 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1441 | SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS, | |
1442 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1443 | return EXT_RETURN_FAIL; |
6af87546 MC |
1444 | } |
1445 | } | |
1446 | } | |
1447 | ||
1448 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
1449 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1450 | SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS, | |
1451 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1452 | return EXT_RETURN_FAIL; |
6af87546 MC |
1453 | } |
1454 | ||
b186a592 | 1455 | return EXT_RETURN_SENT; |
6af87546 | 1456 | } |
cf53cbea | 1457 | #endif |
6af87546 | 1458 | |
b186a592 MC |
1459 | EXT_RETURN tls_construct_stoc_session_ticket(SSL *s, WPACKET *pkt, |
1460 | unsigned int context, X509 *x, | |
f63a17d6 | 1461 | size_t chainidx) |
7da160b0 | 1462 | { |
aff8c126 RS |
1463 | if (!s->ext.ticket_expected || !tls_use_ticket(s)) { |
1464 | s->ext.ticket_expected = 0; | |
b186a592 | 1465 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1466 | } |
1467 | ||
1468 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket) | |
1469 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
f63a17d6 MC |
1470 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1471 | SSL_F_TLS_CONSTRUCT_STOC_SESSION_TICKET, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1472 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1473 | } |
1474 | ||
b186a592 | 1475 | return EXT_RETURN_SENT; |
7da160b0 MC |
1476 | } |
1477 | ||
ab83e314 | 1478 | #ifndef OPENSSL_NO_OCSP |
b186a592 MC |
1479 | EXT_RETURN tls_construct_stoc_status_request(SSL *s, WPACKET *pkt, |
1480 | unsigned int context, X509 *x, | |
f63a17d6 | 1481 | size_t chainidx) |
7da160b0 | 1482 | { |
aff8c126 | 1483 | if (!s->ext.status_expected) |
b186a592 | 1484 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 1485 | |
8521ced6 | 1486 | if (SSL_IS_TLS13(s) && chainidx != 0) |
b186a592 | 1487 | return EXT_RETURN_NOT_SENT; |
e96e0f8e | 1488 | |
7da160b0 | 1489 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request) |
f63e4288 | 1490 | || !WPACKET_start_sub_packet_u16(pkt)) { |
f63a17d6 MC |
1491 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1492 | SSL_F_TLS_CONSTRUCT_STOC_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1493 | return EXT_RETURN_FAIL; |
f63e4288 MC |
1494 | } |
1495 | ||
1496 | /* | |
1497 | * In TLSv1.3 we include the certificate status itself. In <= TLSv1.2 we | |
1498 | * send back an empty extension, with the certificate status appearing as a | |
1499 | * separate message | |
1500 | */ | |
3ec8d113 MC |
1501 | if (SSL_IS_TLS13(s) && !tls_construct_cert_status_body(s, pkt)) { |
1502 | /* SSLfatal() already called */ | |
56d36288 | 1503 | return EXT_RETURN_FAIL; |
3ec8d113 MC |
1504 | } |
1505 | if (!WPACKET_close(pkt)) { | |
f63a17d6 MC |
1506 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1507 | SSL_F_TLS_CONSTRUCT_STOC_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1508 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1509 | } |
1510 | ||
b186a592 | 1511 | return EXT_RETURN_SENT; |
7da160b0 | 1512 | } |
ab83e314 | 1513 | #endif |
7da160b0 | 1514 | |
7da160b0 | 1515 | #ifndef OPENSSL_NO_NEXTPROTONEG |
b186a592 MC |
1516 | EXT_RETURN tls_construct_stoc_next_proto_neg(SSL *s, WPACKET *pkt, |
1517 | unsigned int context, X509 *x, | |
f63a17d6 | 1518 | size_t chainidx) |
7da160b0 MC |
1519 | { |
1520 | const unsigned char *npa; | |
1521 | unsigned int npalen; | |
1522 | int ret; | |
aff8c126 | 1523 | int npn_seen = s->s3->npn_seen; |
7da160b0 | 1524 | |
aff8c126 RS |
1525 | s->s3->npn_seen = 0; |
1526 | if (!npn_seen || s->ctx->ext.npn_advertised_cb == NULL) | |
b186a592 | 1527 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 1528 | |
aff8c126 RS |
1529 | ret = s->ctx->ext.npn_advertised_cb(s, &npa, &npalen, |
1530 | s->ctx->ext.npn_advertised_cb_arg); | |
7da160b0 MC |
1531 | if (ret == SSL_TLSEXT_ERR_OK) { |
1532 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_next_proto_neg) | |
1533 | || !WPACKET_sub_memcpy_u16(pkt, npa, npalen)) { | |
f63a17d6 MC |
1534 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1535 | SSL_F_TLS_CONSTRUCT_STOC_NEXT_PROTO_NEG, | |
1536 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1537 | return EXT_RETURN_FAIL; |
7da160b0 | 1538 | } |
aff8c126 | 1539 | s->s3->npn_seen = 1; |
7da160b0 MC |
1540 | } |
1541 | ||
b186a592 | 1542 | return EXT_RETURN_SENT; |
7da160b0 MC |
1543 | } |
1544 | #endif | |
1545 | ||
b186a592 | 1546 | EXT_RETURN tls_construct_stoc_alpn(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 1547 | X509 *x, size_t chainidx) |
7da160b0 MC |
1548 | { |
1549 | if (s->s3->alpn_selected == NULL) | |
b186a592 | 1550 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1551 | |
1552 | if (!WPACKET_put_bytes_u16(pkt, | |
1553 | TLSEXT_TYPE_application_layer_protocol_negotiation) | |
1554 | || !WPACKET_start_sub_packet_u16(pkt) | |
1555 | || !WPACKET_start_sub_packet_u16(pkt) | |
1556 | || !WPACKET_sub_memcpy_u8(pkt, s->s3->alpn_selected, | |
1557 | s->s3->alpn_selected_len) | |
1558 | || !WPACKET_close(pkt) | |
1559 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
1560 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1561 | SSL_F_TLS_CONSTRUCT_STOC_ALPN, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1562 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1563 | } |
1564 | ||
b186a592 | 1565 | return EXT_RETURN_SENT; |
7da160b0 MC |
1566 | } |
1567 | ||
1568 | #ifndef OPENSSL_NO_SRTP | |
b186a592 MC |
1569 | EXT_RETURN tls_construct_stoc_use_srtp(SSL *s, WPACKET *pkt, |
1570 | unsigned int context, X509 *x, | |
f63a17d6 | 1571 | size_t chainidx) |
7da160b0 MC |
1572 | { |
1573 | if (s->srtp_profile == NULL) | |
b186a592 | 1574 | return EXT_RETURN_NOT_SENT; |
a1448c26 | 1575 | |
7da160b0 MC |
1576 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp) |
1577 | || !WPACKET_start_sub_packet_u16(pkt) | |
1578 | || !WPACKET_put_bytes_u16(pkt, 2) | |
1579 | || !WPACKET_put_bytes_u16(pkt, s->srtp_profile->id) | |
1580 | || !WPACKET_put_bytes_u8(pkt, 0) | |
1581 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
1582 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_USE_SRTP, |
1583 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1584 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1585 | } |
1586 | ||
b186a592 | 1587 | return EXT_RETURN_SENT; |
7da160b0 MC |
1588 | } |
1589 | #endif | |
1590 | ||
b186a592 | 1591 | EXT_RETURN tls_construct_stoc_etm(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 1592 | X509 *x, size_t chainidx) |
7da160b0 | 1593 | { |
28a31a0a | 1594 | if (!s->ext.use_etm) |
b186a592 | 1595 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1596 | |
1597 | /* | |
1598 | * Don't use encrypt_then_mac if AEAD or RC4 might want to disable | |
1599 | * for other cases too. | |
1600 | */ | |
1601 | if (s->s3->tmp.new_cipher->algorithm_mac == SSL_AEAD | |
1602 | || s->s3->tmp.new_cipher->algorithm_enc == SSL_RC4 | |
1603 | || s->s3->tmp.new_cipher->algorithm_enc == SSL_eGOST2814789CNT | |
1604 | || s->s3->tmp.new_cipher->algorithm_enc == SSL_eGOST2814789CNT12) { | |
28a31a0a | 1605 | s->ext.use_etm = 0; |
b186a592 | 1606 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1607 | } |
1608 | ||
1609 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac) | |
1610 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
f63a17d6 MC |
1611 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_ETM, |
1612 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1613 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1614 | } |
1615 | ||
b186a592 | 1616 | return EXT_RETURN_SENT; |
7da160b0 MC |
1617 | } |
1618 | ||
b186a592 | 1619 | EXT_RETURN tls_construct_stoc_ems(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 1620 | X509 *x, size_t chainidx) |
7da160b0 MC |
1621 | { |
1622 | if ((s->s3->flags & TLS1_FLAGS_RECEIVED_EXTMS) == 0) | |
b186a592 | 1623 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1624 | |
1625 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret) | |
1626 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
f63a17d6 MC |
1627 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_EMS, |
1628 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1629 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1630 | } |
1631 | ||
b186a592 | 1632 | return EXT_RETURN_SENT; |
7da160b0 MC |
1633 | } |
1634 | ||
88050dd1 MC |
1635 | EXT_RETURN tls_construct_stoc_supported_versions(SSL *s, WPACKET *pkt, |
1636 | unsigned int context, X509 *x, | |
1637 | size_t chainidx) | |
1638 | { | |
27e462f1 MC |
1639 | if (!ossl_assert(SSL_IS_TLS13(s))) { |
1640 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
1641 | SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_VERSIONS, | |
1642 | ERR_R_INTERNAL_ERROR); | |
1643 | return EXT_RETURN_FAIL; | |
1644 | } | |
88050dd1 MC |
1645 | |
1646 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_versions) | |
1647 | || !WPACKET_start_sub_packet_u16(pkt) | |
1648 | /* TODO(TLS1.3): Update to remove the TLSv1.3 draft indicator */ | |
73cc84a1 | 1649 | || !WPACKET_put_bytes_u16(pkt, s->version_draft) |
88050dd1 MC |
1650 | || !WPACKET_close(pkt)) { |
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 | } | |
1656 | ||
1657 | return EXT_RETURN_SENT; | |
1658 | } | |
1659 | ||
b186a592 MC |
1660 | EXT_RETURN tls_construct_stoc_key_share(SSL *s, WPACKET *pkt, |
1661 | unsigned int context, X509 *x, | |
f63a17d6 | 1662 | size_t chainidx) |
7da160b0 | 1663 | { |
3cf96e88 | 1664 | #ifndef OPENSSL_NO_TLS1_3 |
7da160b0 MC |
1665 | unsigned char *encodedPoint; |
1666 | size_t encoded_pt_len = 0; | |
1667 | EVP_PKEY *ckey = s->s3->peer_tmp, *skey = NULL; | |
1668 | ||
dd77962e MC |
1669 | if (s->hello_retry_request == SSL_HRR_PENDING) { |
1670 | if (ckey != NULL) { | |
1671 | /* Original key_share was acceptable so don't ask for another one */ | |
1672 | return EXT_RETURN_NOT_SENT; | |
1673 | } | |
1674 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
1675 | || !WPACKET_start_sub_packet_u16(pkt) | |
1676 | || !WPACKET_put_bytes_u16(pkt, s->s3->group_id) | |
1677 | || !WPACKET_close(pkt)) { | |
1678 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
1679 | SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, | |
1680 | ERR_R_INTERNAL_ERROR); | |
1681 | return EXT_RETURN_FAIL; | |
7d061fce MC |
1682 | } |
1683 | ||
dd77962e MC |
1684 | return EXT_RETURN_SENT; |
1685 | } | |
1686 | ||
1687 | if (ckey == NULL) { | |
1688 | /* No key_share received from client - must be resuming */ | |
0247086d | 1689 | if (!s->hit || !tls13_generate_handshake_secret(s, NULL, 0)) { |
f63a17d6 MC |
1690 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1691 | SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1692 | return EXT_RETURN_FAIL; |
0247086d | 1693 | } |
b186a592 | 1694 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1695 | } |
1696 | ||
1697 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
1698 | || !WPACKET_start_sub_packet_u16(pkt) | |
1699 | || !WPACKET_put_bytes_u16(pkt, s->s3->group_id)) { | |
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; |
7da160b0 MC |
1703 | } |
1704 | ||
1705 | skey = ssl_generate_pkey(ckey); | |
1706 | if (skey == NULL) { | |
f63a17d6 MC |
1707 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, |
1708 | ERR_R_MALLOC_FAILURE); | |
b186a592 | 1709 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1710 | } |
1711 | ||
1712 | /* Generate encoding of server key */ | |
1713 | encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(skey, &encodedPoint); | |
1714 | if (encoded_pt_len == 0) { | |
f63a17d6 MC |
1715 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, |
1716 | ERR_R_EC_LIB); | |
7da160b0 | 1717 | EVP_PKEY_free(skey); |
b186a592 | 1718 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1719 | } |
1720 | ||
1721 | if (!WPACKET_sub_memcpy_u16(pkt, encodedPoint, encoded_pt_len) | |
1722 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
1723 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, |
1724 | ERR_R_INTERNAL_ERROR); | |
7da160b0 MC |
1725 | EVP_PKEY_free(skey); |
1726 | OPENSSL_free(encodedPoint); | |
b186a592 | 1727 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1728 | } |
1729 | OPENSSL_free(encodedPoint); | |
1730 | ||
1731 | /* This causes the crypto state to be updated based on the derived keys */ | |
1732 | s->s3->tmp.pkey = skey; | |
1733 | if (ssl_derive(s, skey, ckey, 1) == 0) { | |
f63a17d6 | 1734 | /* SSLfatal() already called */ |
b186a592 | 1735 | return EXT_RETURN_FAIL; |
7da160b0 | 1736 | } |
b186a592 | 1737 | return EXT_RETURN_SENT; |
1aac20f5 MC |
1738 | #else |
1739 | return EXT_RETURN_FAIL; | |
1740 | #endif | |
7da160b0 MC |
1741 | } |
1742 | ||
43054d3d MC |
1743 | EXT_RETURN tls_construct_stoc_cookie(SSL *s, WPACKET *pkt, unsigned int context, |
1744 | X509 *x, size_t chainidx) | |
1745 | { | |
1aac20f5 | 1746 | #ifndef OPENSSL_NO_TLS1_3 |
43054d3d MC |
1747 | unsigned char *hashval1, *hashval2, *appcookie1, *appcookie2, *cookie; |
1748 | unsigned char *hmac, *hmac2; | |
3fa2812f | 1749 | size_t startlen, ciphlen, totcookielen, hashlen, hmaclen, appcookielen; |
43054d3d MC |
1750 | EVP_MD_CTX *hctx; |
1751 | EVP_PKEY *pkey; | |
1752 | int ret = EXT_RETURN_FAIL; | |
1753 | ||
e440f513 | 1754 | if ((s->s3->flags & TLS1_FLAGS_STATELESS) == 0) |
43054d3d MC |
1755 | return EXT_RETURN_NOT_SENT; |
1756 | ||
3fa2812f | 1757 | if (s->ctx->gen_stateless_cookie_cb == NULL) { |
e440f513 MC |
1758 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_COOKIE, |
1759 | SSL_R_NO_COOKIE_CALLBACK_SET); | |
1760 | return EXT_RETURN_FAIL; | |
1761 | } | |
1762 | ||
43054d3d MC |
1763 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_cookie) |
1764 | || !WPACKET_start_sub_packet_u16(pkt) | |
1765 | || !WPACKET_start_sub_packet_u16(pkt) | |
1766 | || !WPACKET_get_total_written(pkt, &startlen) | |
1767 | || !WPACKET_reserve_bytes(pkt, MAX_COOKIE_SIZE, &cookie) | |
1768 | || !WPACKET_put_bytes_u16(pkt, COOKIE_STATE_FORMAT_VERSION) | |
1769 | || !WPACKET_put_bytes_u16(pkt, TLS1_3_VERSION) | |
1770 | || !WPACKET_put_bytes_u16(pkt, s->s3->group_id) | |
1771 | || !s->method->put_cipher_by_char(s->s3->tmp.new_cipher, pkt, | |
1772 | &ciphlen) | |
1773 | /* Is there a key_share extension present in this HRR? */ | |
1774 | || !WPACKET_put_bytes_u8(pkt, s->s3->peer_tmp == NULL) | |
d0debc0a | 1775 | || !WPACKET_put_bytes_u32(pkt, (unsigned int)time(NULL)) |
43054d3d MC |
1776 | || !WPACKET_start_sub_packet_u16(pkt) |
1777 | || !WPACKET_reserve_bytes(pkt, EVP_MAX_MD_SIZE, &hashval1)) { | |
1778 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_COOKIE, | |
1779 | ERR_R_INTERNAL_ERROR); | |
1780 | return EXT_RETURN_FAIL; | |
1781 | } | |
1782 | ||
1783 | /* | |
1784 | * Get the hash of the initial ClientHello. ssl_handshake_hash() operates | |
1785 | * on raw buffers, so we first reserve sufficient bytes (above) and then | |
1786 | * subsequently allocate them (below) | |
1787 | */ | |
1788 | if (!ssl3_digest_cached_records(s, 0) | |
1789 | || !ssl_handshake_hash(s, hashval1, EVP_MAX_MD_SIZE, &hashlen)) { | |
1790 | /* SSLfatal() already called */ | |
1791 | return EXT_RETURN_FAIL; | |
1792 | } | |
1793 | ||
1794 | if (!WPACKET_allocate_bytes(pkt, hashlen, &hashval2) | |
1795 | || !ossl_assert(hashval1 == hashval2) | |
1796 | || !WPACKET_close(pkt) | |
1797 | || !WPACKET_start_sub_packet_u8(pkt) | |
1798 | || !WPACKET_reserve_bytes(pkt, SSL_COOKIE_LENGTH, &appcookie1)) { | |
1799 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_COOKIE, | |
1800 | ERR_R_INTERNAL_ERROR); | |
1801 | return EXT_RETURN_FAIL; | |
1802 | } | |
1803 | ||
1804 | /* Generate the application cookie */ | |
3fa2812f | 1805 | if (s->ctx->gen_stateless_cookie_cb(s, appcookie1, &appcookielen) == 0) { |
43054d3d MC |
1806 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_COOKIE, |
1807 | SSL_R_COOKIE_GEN_CALLBACK_FAILURE); | |
1808 | return EXT_RETURN_FAIL; | |
1809 | } | |
1810 | ||
1811 | if (!WPACKET_allocate_bytes(pkt, appcookielen, &appcookie2) | |
1812 | || !ossl_assert(appcookie1 == appcookie2) | |
1813 | || !WPACKET_close(pkt) | |
1814 | || !WPACKET_get_total_written(pkt, &totcookielen) | |
1815 | || !WPACKET_reserve_bytes(pkt, SHA256_DIGEST_LENGTH, &hmac)) { | |
1816 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_COOKIE, | |
1817 | ERR_R_INTERNAL_ERROR); | |
1818 | return EXT_RETURN_FAIL; | |
1819 | } | |
1820 | hmaclen = SHA256_DIGEST_LENGTH; | |
1821 | ||
1822 | totcookielen -= startlen; | |
1823 | if (!ossl_assert(totcookielen <= MAX_COOKIE_SIZE - SHA256_DIGEST_LENGTH)) { | |
1824 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_COOKIE, | |
1825 | ERR_R_INTERNAL_ERROR); | |
1826 | return EXT_RETURN_FAIL; | |
1827 | } | |
1828 | ||
1829 | /* HMAC the cookie */ | |
1830 | hctx = EVP_MD_CTX_create(); | |
f929439f MC |
1831 | pkey = EVP_PKEY_new_raw_private_key(EVP_PKEY_HMAC, NULL, |
1832 | s->session_ctx->ext.cookie_hmac_key, | |
1833 | sizeof(s->session_ctx->ext | |
1834 | .cookie_hmac_key)); | |
43054d3d MC |
1835 | if (hctx == NULL || pkey == NULL) { |
1836 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_COOKIE, | |
1837 | ERR_R_MALLOC_FAILURE); | |
1838 | goto err; | |
1839 | } | |
1840 | ||
1841 | if (EVP_DigestSignInit(hctx, NULL, EVP_sha256(), NULL, pkey) <= 0 | |
1842 | || EVP_DigestSign(hctx, hmac, &hmaclen, cookie, | |
1843 | totcookielen) <= 0) { | |
1844 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_COOKIE, | |
1845 | ERR_R_INTERNAL_ERROR); | |
1846 | goto err; | |
1847 | } | |
1848 | ||
1849 | if (!ossl_assert(totcookielen + hmaclen <= MAX_COOKIE_SIZE)) { | |
1850 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_COOKIE, | |
1851 | ERR_R_INTERNAL_ERROR); | |
1852 | goto err; | |
1853 | } | |
1854 | ||
1855 | if (!WPACKET_allocate_bytes(pkt, hmaclen, &hmac2) | |
1856 | || !ossl_assert(hmac == hmac2) | |
1857 | || !ossl_assert(cookie == hmac - totcookielen) | |
1858 | || !WPACKET_close(pkt) | |
1859 | || !WPACKET_close(pkt)) { | |
1860 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_COOKIE, | |
1861 | ERR_R_INTERNAL_ERROR); | |
1862 | goto err; | |
1863 | } | |
1864 | ||
1865 | ret = EXT_RETURN_SENT; | |
1866 | ||
1867 | err: | |
1868 | EVP_MD_CTX_free(hctx); | |
1869 | EVP_PKEY_free(pkey); | |
1870 | return ret; | |
1aac20f5 MC |
1871 | #else |
1872 | return EXT_RETURN_FAIL; | |
1873 | #endif | |
43054d3d MC |
1874 | } |
1875 | ||
b186a592 MC |
1876 | EXT_RETURN tls_construct_stoc_cryptopro_bug(SSL *s, WPACKET *pkt, |
1877 | unsigned int context, X509 *x, | |
f63a17d6 | 1878 | size_t chainidx) |
7da160b0 MC |
1879 | { |
1880 | const unsigned char cryptopro_ext[36] = { | |
1881 | 0xfd, 0xe8, /* 65000 */ | |
1882 | 0x00, 0x20, /* 32 bytes length */ | |
1883 | 0x30, 0x1e, 0x30, 0x08, 0x06, 0x06, 0x2a, 0x85, | |
1884 | 0x03, 0x02, 0x02, 0x09, 0x30, 0x08, 0x06, 0x06, | |
1885 | 0x2a, 0x85, 0x03, 0x02, 0x02, 0x16, 0x30, 0x08, | |
1886 | 0x06, 0x06, 0x2a, 0x85, 0x03, 0x02, 0x02, 0x17 | |
1887 | }; | |
1888 | ||
1889 | if (((s->s3->tmp.new_cipher->id & 0xFFFF) != 0x80 | |
1890 | && (s->s3->tmp.new_cipher->id & 0xFFFF) != 0x81) | |
1891 | || (SSL_get_options(s) & SSL_OP_CRYPTOPRO_TLSEXT_BUG) == 0) | |
b186a592 | 1892 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1893 | |
1894 | if (!WPACKET_memcpy(pkt, cryptopro_ext, sizeof(cryptopro_ext))) { | |
f63a17d6 MC |
1895 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1896 | SSL_F_TLS_CONSTRUCT_STOC_CRYPTOPRO_BUG, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1897 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1898 | } |
1899 | ||
b186a592 | 1900 | return EXT_RETURN_SENT; |
7da160b0 | 1901 | } |
0247086d | 1902 | |
b186a592 MC |
1903 | EXT_RETURN tls_construct_stoc_early_data(SSL *s, WPACKET *pkt, |
1904 | unsigned int context, X509 *x, | |
f63a17d6 | 1905 | size_t chainidx) |
38df5a45 | 1906 | { |
fe874d27 | 1907 | if (context == SSL_EXT_TLS1_3_NEW_SESSION_TICKET) { |
6594189f | 1908 | if (s->max_early_data == 0) |
b186a592 | 1909 | return EXT_RETURN_NOT_SENT; |
6594189f MC |
1910 | |
1911 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) | |
1912 | || !WPACKET_start_sub_packet_u16(pkt) | |
1913 | || !WPACKET_put_bytes_u32(pkt, s->max_early_data) | |
1914 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
1915 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1916 | SSL_F_TLS_CONSTRUCT_STOC_EARLY_DATA, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1917 | return EXT_RETURN_FAIL; |
6594189f MC |
1918 | } |
1919 | ||
b186a592 | 1920 | return EXT_RETURN_SENT; |
6594189f MC |
1921 | } |
1922 | ||
38df5a45 | 1923 | if (s->ext.early_data != SSL_EARLY_DATA_ACCEPTED) |
b186a592 | 1924 | return EXT_RETURN_NOT_SENT; |
38df5a45 MC |
1925 | |
1926 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) | |
1927 | || !WPACKET_start_sub_packet_u16(pkt) | |
1928 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
1929 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_EARLY_DATA, |
1930 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1931 | return EXT_RETURN_FAIL; |
38df5a45 MC |
1932 | } |
1933 | ||
b186a592 | 1934 | return EXT_RETURN_SENT; |
38df5a45 MC |
1935 | } |
1936 | ||
b186a592 | 1937 | EXT_RETURN tls_construct_stoc_psk(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 1938 | X509 *x, size_t chainidx) |
0247086d MC |
1939 | { |
1940 | if (!s->hit) | |
b186a592 | 1941 | return EXT_RETURN_NOT_SENT; |
0247086d MC |
1942 | |
1943 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk) | |
1944 | || !WPACKET_start_sub_packet_u16(pkt) | |
1945 | || !WPACKET_put_bytes_u16(pkt, s->session->ext.tick_identity) | |
1946 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
1947 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1948 | SSL_F_TLS_CONSTRUCT_STOC_PSK, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1949 | return EXT_RETURN_FAIL; |
0247086d MC |
1950 | } |
1951 | ||
b186a592 | 1952 | return EXT_RETURN_SENT; |
0247086d | 1953 | } |