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25670f3e | 1 | /* |
b186a592 | 2 | * Copyright 2016-2017 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 | ||
e96e0f8e MC |
327 | /* Not defined if we get one of these in a client Certificate */ |
328 | if (x != NULL) | |
329 | return 1; | |
330 | ||
aff8c126 | 331 | if (!PACKET_get_1(pkt, (unsigned int *)&s->ext.status_type)) { |
f63a17d6 MC |
332 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
333 | SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, SSL_R_BAD_EXTENSION); | |
25670f3e MC |
334 | return 0; |
335 | } | |
ab83e314 | 336 | |
aff8c126 | 337 | if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) { |
25670f3e | 338 | /* |
1266eefd | 339 | * We don't know what to do with any other type so ignore it. |
25670f3e | 340 | */ |
aff8c126 | 341 | s->ext.status_type = TLSEXT_STATUSTYPE_nothing; |
1266eefd MC |
342 | return 1; |
343 | } | |
25670f3e | 344 | |
1266eefd | 345 | if (!PACKET_get_length_prefixed_2 (pkt, &responder_id_list)) { |
f63a17d6 MC |
346 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
347 | SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, SSL_R_BAD_EXTENSION); | |
1266eefd MC |
348 | return 0; |
349 | } | |
25670f3e | 350 | |
1266eefd MC |
351 | /* |
352 | * We remove any OCSP_RESPIDs from a previous handshake | |
353 | * to prevent unbounded memory growth - CVE-2016-6304 | |
354 | */ | |
aff8c126 | 355 | sk_OCSP_RESPID_pop_free(s->ext.ocsp.ids, OCSP_RESPID_free); |
1266eefd | 356 | if (PACKET_remaining(&responder_id_list) > 0) { |
aff8c126 RS |
357 | s->ext.ocsp.ids = sk_OCSP_RESPID_new_null(); |
358 | if (s->ext.ocsp.ids == NULL) { | |
f63a17d6 MC |
359 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
360 | SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, ERR_R_MALLOC_FAILURE); | |
1266eefd MC |
361 | return 0; |
362 | } | |
363 | } else { | |
aff8c126 | 364 | s->ext.ocsp.ids = NULL; |
1266eefd | 365 | } |
25670f3e | 366 | |
1266eefd MC |
367 | while (PACKET_remaining(&responder_id_list) > 0) { |
368 | OCSP_RESPID *id; | |
369 | PACKET responder_id; | |
370 | const unsigned char *id_data; | |
25670f3e | 371 | |
1266eefd MC |
372 | if (!PACKET_get_length_prefixed_2(&responder_id_list, &responder_id) |
373 | || PACKET_remaining(&responder_id) == 0) { | |
f63a17d6 MC |
374 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
375 | SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, SSL_R_BAD_EXTENSION); | |
1266eefd MC |
376 | return 0; |
377 | } | |
25670f3e | 378 | |
1266eefd MC |
379 | id_data = PACKET_data(&responder_id); |
380 | /* TODO(size_t): Convert d2i_* to size_t */ | |
381 | id = d2i_OCSP_RESPID(NULL, &id_data, | |
382 | (int)PACKET_remaining(&responder_id)); | |
383 | if (id == NULL) { | |
f63a17d6 MC |
384 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
385 | SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, SSL_R_BAD_EXTENSION); | |
1266eefd | 386 | return 0; |
25670f3e MC |
387 | } |
388 | ||
1266eefd MC |
389 | if (id_data != PACKET_end(&responder_id)) { |
390 | OCSP_RESPID_free(id); | |
f63a17d6 MC |
391 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
392 | SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, SSL_R_BAD_EXTENSION); | |
393 | ||
25670f3e MC |
394 | return 0; |
395 | } | |
396 | ||
aff8c126 | 397 | if (!sk_OCSP_RESPID_push(s->ext.ocsp.ids, id)) { |
1266eefd | 398 | OCSP_RESPID_free(id); |
f63a17d6 MC |
399 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
400 | SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); | |
401 | ||
1266eefd MC |
402 | return 0; |
403 | } | |
404 | } | |
405 | ||
406 | /* Read in request_extensions */ | |
407 | if (!PACKET_as_length_prefixed_2(pkt, &exts)) { | |
f63a17d6 MC |
408 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
409 | SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, SSL_R_BAD_EXTENSION); | |
1266eefd MC |
410 | return 0; |
411 | } | |
412 | ||
413 | if (PACKET_remaining(&exts) > 0) { | |
414 | const unsigned char *ext_data = PACKET_data(&exts); | |
415 | ||
aff8c126 | 416 | sk_X509_EXTENSION_pop_free(s->ext.ocsp.exts, |
1266eefd | 417 | X509_EXTENSION_free); |
aff8c126 | 418 | s->ext.ocsp.exts = |
1266eefd | 419 | d2i_X509_EXTENSIONS(NULL, &ext_data, (int)PACKET_remaining(&exts)); |
aff8c126 | 420 | if (s->ext.ocsp.exts == NULL || ext_data != PACKET_end(&exts)) { |
f63a17d6 MC |
421 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
422 | SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, SSL_R_BAD_EXTENSION); | |
1266eefd | 423 | return 0; |
25670f3e | 424 | } |
25670f3e MC |
425 | } |
426 | ||
427 | return 1; | |
428 | } | |
ab83e314 | 429 | #endif |
25670f3e MC |
430 | |
431 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
61138358 | 432 | int tls_parse_ctos_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 433 | size_t chainidx) |
25670f3e | 434 | { |
1266eefd MC |
435 | /* |
436 | * We shouldn't accept this extension on a | |
437 | * renegotiation. | |
1266eefd | 438 | */ |
c7f47786 | 439 | if (SSL_IS_FIRST_HANDSHAKE(s)) |
aff8c126 | 440 | s->s3->npn_seen = 1; |
25670f3e MC |
441 | |
442 | return 1; | |
443 | } | |
444 | #endif | |
445 | ||
446 | /* | |
1266eefd | 447 | * Save the ALPN extension in a ClientHello.|pkt| holds the contents of the ALPN |
29bfd5b7 | 448 | * extension, not including type and length. Returns: 1 on success, 0 on error. |
25670f3e | 449 | */ |
61138358 | 450 | int tls_parse_ctos_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 451 | size_t chainidx) |
25670f3e MC |
452 | { |
453 | PACKET protocol_list, save_protocol_list, protocol; | |
454 | ||
c7f47786 | 455 | if (!SSL_IS_FIRST_HANDSHAKE(s)) |
25670f3e MC |
456 | return 1; |
457 | ||
458 | if (!PACKET_as_length_prefixed_2(pkt, &protocol_list) | |
459 | || PACKET_remaining(&protocol_list) < 2) { | |
f63a17d6 MC |
460 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_ALPN, |
461 | SSL_R_BAD_EXTENSION); | |
25670f3e MC |
462 | return 0; |
463 | } | |
464 | ||
465 | save_protocol_list = protocol_list; | |
466 | do { | |
467 | /* Protocol names can't be empty. */ | |
468 | if (!PACKET_get_length_prefixed_1(&protocol_list, &protocol) | |
469 | || PACKET_remaining(&protocol) == 0) { | |
f63a17d6 MC |
470 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_ALPN, |
471 | SSL_R_BAD_EXTENSION); | |
25670f3e MC |
472 | return 0; |
473 | } | |
474 | } while (PACKET_remaining(&protocol_list) != 0); | |
475 | ||
7d061fce MC |
476 | OPENSSL_free(s->s3->alpn_proposed); |
477 | s->s3->alpn_proposed = NULL; | |
478 | s->s3->alpn_proposed_len = 0; | |
25670f3e MC |
479 | if (!PACKET_memdup(&save_protocol_list, |
480 | &s->s3->alpn_proposed, &s->s3->alpn_proposed_len)) { | |
f63a17d6 MC |
481 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_ALPN, |
482 | ERR_R_INTERNAL_ERROR); | |
25670f3e MC |
483 | return 0; |
484 | } | |
485 | ||
486 | return 1; | |
487 | } | |
488 | ||
489 | #ifndef OPENSSL_NO_SRTP | |
61138358 | 490 | int tls_parse_ctos_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 491 | size_t chainidx) |
25670f3e | 492 | { |
25670f3e MC |
493 | STACK_OF(SRTP_PROTECTION_PROFILE) *srvr; |
494 | unsigned int ct, mki_len, id; | |
495 | int i, srtp_pref; | |
496 | PACKET subpkt; | |
497 | ||
498 | /* Ignore this if we have no SRTP profiles */ | |
499 | if (SSL_get_srtp_profiles(s) == NULL) | |
500 | return 1; | |
501 | ||
502 | /* Pull off the length of the cipher suite list and check it is even */ | |
1266eefd MC |
503 | if (!PACKET_get_net_2(pkt, &ct) || (ct & 1) != 0 |
504 | || !PACKET_get_sub_packet(pkt, &subpkt, ct)) { | |
f63a17d6 | 505 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_USE_SRTP, |
25670f3e | 506 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
25670f3e MC |
507 | return 0; |
508 | } | |
509 | ||
510 | srvr = SSL_get_srtp_profiles(s); | |
511 | s->srtp_profile = NULL; | |
512 | /* Search all profiles for a match initially */ | |
513 | srtp_pref = sk_SRTP_PROTECTION_PROFILE_num(srvr); | |
514 | ||
515 | while (PACKET_remaining(&subpkt)) { | |
516 | if (!PACKET_get_net_2(&subpkt, &id)) { | |
f63a17d6 MC |
517 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_USE_SRTP, |
518 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); | |
25670f3e MC |
519 | return 0; |
520 | } | |
521 | ||
522 | /* | |
523 | * Only look for match in profiles of higher preference than | |
524 | * current match. | |
525 | * If no profiles have been have been configured then this | |
526 | * does nothing. | |
527 | */ | |
528 | for (i = 0; i < srtp_pref; i++) { | |
d270de32 | 529 | SRTP_PROTECTION_PROFILE *sprof = |
1266eefd MC |
530 | sk_SRTP_PROTECTION_PROFILE_value(srvr, i); |
531 | ||
25670f3e MC |
532 | if (sprof->id == id) { |
533 | s->srtp_profile = sprof; | |
534 | srtp_pref = i; | |
535 | break; | |
536 | } | |
537 | } | |
538 | } | |
539 | ||
1266eefd | 540 | /* Now extract the MKI value as a sanity check, but discard it for now */ |
25670f3e | 541 | if (!PACKET_get_1(pkt, &mki_len)) { |
f63a17d6 MC |
542 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_USE_SRTP, |
543 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); | |
25670f3e MC |
544 | return 0; |
545 | } | |
546 | ||
547 | if (!PACKET_forward(pkt, mki_len) | |
548 | || PACKET_remaining(pkt)) { | |
f63a17d6 MC |
549 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_USE_SRTP, |
550 | SSL_R_BAD_SRTP_MKI_VALUE); | |
25670f3e MC |
551 | return 0; |
552 | } | |
553 | ||
554 | return 1; | |
555 | } | |
556 | #endif | |
557 | ||
61138358 | 558 | int tls_parse_ctos_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 559 | size_t chainidx) |
25670f3e MC |
560 | { |
561 | if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC)) | |
28a31a0a | 562 | s->ext.use_etm = 1; |
25670f3e MC |
563 | |
564 | return 1; | |
565 | } | |
566 | ||
b2f7e8c0 MC |
567 | /* |
568 | * Process a psk_kex_modes extension received in the ClientHello. |pkt| contains | |
569 | * the raw PACKET data for the extension. Returns 1 on success or 0 on failure. | |
b2f7e8c0 | 570 | */ |
61138358 | 571 | int tls_parse_ctos_psk_kex_modes(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 572 | X509 *x, size_t chainidx) |
b2f7e8c0 MC |
573 | { |
574 | #ifndef OPENSSL_NO_TLS1_3 | |
575 | PACKET psk_kex_modes; | |
576 | unsigned int mode; | |
577 | ||
578 | if (!PACKET_as_length_prefixed_1(pkt, &psk_kex_modes) | |
579 | || PACKET_remaining(&psk_kex_modes) == 0) { | |
f63a17d6 MC |
580 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_PSK_KEX_MODES, |
581 | SSL_R_BAD_EXTENSION); | |
b2f7e8c0 MC |
582 | return 0; |
583 | } | |
584 | ||
585 | while (PACKET_get_1(&psk_kex_modes, &mode)) { | |
586 | if (mode == TLSEXT_KEX_MODE_KE_DHE) | |
587 | s->ext.psk_kex_mode |= TLSEXT_KEX_MODE_FLAG_KE_DHE; | |
e3c0d76b MC |
588 | else if (mode == TLSEXT_KEX_MODE_KE |
589 | && (s->options & SSL_OP_ALLOW_NO_DHE_KEX) != 0) | |
b2f7e8c0 MC |
590 | s->ext.psk_kex_mode |= TLSEXT_KEX_MODE_FLAG_KE; |
591 | } | |
592 | #endif | |
593 | ||
594 | return 1; | |
595 | } | |
596 | ||
25670f3e MC |
597 | /* |
598 | * Process a key_share extension received in the ClientHello. |pkt| contains | |
599 | * the raw PACKET data for the extension. Returns 1 on success or 0 on failure. | |
25670f3e | 600 | */ |
61138358 | 601 | int tls_parse_ctos_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 602 | size_t chainidx) |
25670f3e | 603 | { |
3cf96e88 | 604 | #ifndef OPENSSL_NO_TLS1_3 |
25670f3e MC |
605 | unsigned int group_id; |
606 | PACKET key_share_list, encoded_pt; | |
f48d826e DSH |
607 | const uint16_t *clntgroups, *srvrgroups; |
608 | size_t clnt_num_groups, srvr_num_groups; | |
43b95d73 | 609 | int found = 0; |
25670f3e | 610 | |
f4bbb37c | 611 | if (s->hit && (s->ext.psk_kex_mode & TLSEXT_KEX_MODE_FLAG_KE_DHE) == 0) |
25670f3e MC |
612 | return 1; |
613 | ||
614 | /* Sanity check */ | |
615 | if (s->s3->peer_tmp != NULL) { | |
f63a17d6 MC |
616 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_KEY_SHARE, |
617 | ERR_R_INTERNAL_ERROR); | |
25670f3e MC |
618 | return 0; |
619 | } | |
620 | ||
621 | if (!PACKET_as_length_prefixed_2(pkt, &key_share_list)) { | |
f63a17d6 MC |
622 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_KEY_SHARE, |
623 | SSL_R_LENGTH_MISMATCH); | |
25670f3e MC |
624 | return 0; |
625 | } | |
626 | ||
f48d826e DSH |
627 | /* Get our list of supported groups */ |
628 | tls1_get_supported_groups(s, &srvrgroups, &srvr_num_groups); | |
629 | /* Get the clients list of supported groups. */ | |
630 | tls1_get_peer_groups(s, &clntgroups, &clnt_num_groups); | |
631 | if (clnt_num_groups == 0) { | |
b6fdc12d MC |
632 | /* |
633 | * This can only happen if the supported_groups extension was not sent, | |
634 | * because we verify that the length is non-zero when we process that | |
635 | * extension. | |
636 | */ | |
f63a17d6 MC |
637 | SSLfatal(s, SSL_AD_MISSING_EXTENSION, SSL_F_TLS_PARSE_CTOS_KEY_SHARE, |
638 | SSL_R_MISSING_SUPPORTED_GROUPS_EXTENSION); | |
b6fdc12d MC |
639 | return 0; |
640 | } | |
25670f3e | 641 | |
43054d3d MC |
642 | if (s->s3->group_id != 0 && PACKET_remaining(&key_share_list) == 0) { |
643 | /* | |
644 | * If we set a group_id already, then we must have sent an HRR | |
645 | * requesting a new key_share. If we haven't got one then that is an | |
646 | * error | |
647 | */ | |
648 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_CTOS_KEY_SHARE, | |
649 | SSL_R_BAD_KEY_SHARE); | |
650 | return 0; | |
651 | } | |
652 | ||
25670f3e MC |
653 | while (PACKET_remaining(&key_share_list) > 0) { |
654 | if (!PACKET_get_net_2(&key_share_list, &group_id) | |
655 | || !PACKET_get_length_prefixed_2(&key_share_list, &encoded_pt) | |
656 | || PACKET_remaining(&encoded_pt) == 0) { | |
f63a17d6 MC |
657 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_KEY_SHARE, |
658 | SSL_R_LENGTH_MISMATCH); | |
25670f3e MC |
659 | return 0; |
660 | } | |
661 | ||
662 | /* | |
663 | * If we already found a suitable key_share we loop through the | |
664 | * rest to verify the structure, but don't process them. | |
665 | */ | |
666 | if (found) | |
667 | continue; | |
668 | ||
43054d3d MC |
669 | /* |
670 | * If we sent an HRR then the key_share sent back MUST be for the group | |
671 | * we requested, and must be the only key_share sent. | |
672 | */ | |
673 | if (s->s3->group_id != 0 | |
674 | && (group_id != s->s3->group_id | |
675 | || PACKET_remaining(&key_share_list) != 0)) { | |
676 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, | |
677 | SSL_F_TLS_PARSE_CTOS_KEY_SHARE, SSL_R_BAD_KEY_SHARE); | |
678 | return 0; | |
679 | } | |
680 | ||
25670f3e | 681 | /* Check if this share is in supported_groups sent from client */ |
f48d826e | 682 | if (!check_in_list(s, group_id, clntgroups, clnt_num_groups, 0)) { |
f63a17d6 MC |
683 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
684 | SSL_F_TLS_PARSE_CTOS_KEY_SHARE, SSL_R_BAD_KEY_SHARE); | |
25670f3e MC |
685 | return 0; |
686 | } | |
687 | ||
688 | /* Check if this share is for a group we can use */ | |
f48d826e | 689 | if (!check_in_list(s, group_id, srvrgroups, srvr_num_groups, 1)) { |
25670f3e MC |
690 | /* Share not suitable */ |
691 | continue; | |
692 | } | |
693 | ||
612f9d22 | 694 | if ((s->s3->peer_tmp = ssl_generate_param_group(group_id)) == NULL) { |
f63a17d6 | 695 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_KEY_SHARE, |
25670f3e MC |
696 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
697 | return 0; | |
698 | } | |
699 | ||
25670f3e MC |
700 | s->s3->group_id = group_id; |
701 | ||
702 | if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp, | |
703 | PACKET_data(&encoded_pt), | |
704 | PACKET_remaining(&encoded_pt))) { | |
f63a17d6 MC |
705 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
706 | SSL_F_TLS_PARSE_CTOS_KEY_SHARE, SSL_R_BAD_ECPOINT); | |
25670f3e MC |
707 | return 0; |
708 | } | |
709 | ||
710 | found = 1; | |
711 | } | |
3cf96e88 | 712 | #endif |
25670f3e MC |
713 | |
714 | return 1; | |
715 | } | |
716 | ||
43054d3d MC |
717 | int tls_parse_ctos_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
718 | size_t chainidx) | |
719 | { | |
dd77962e | 720 | unsigned int format, version, key_share, group_id; |
43054d3d MC |
721 | EVP_MD_CTX *hctx; |
722 | EVP_PKEY *pkey; | |
723 | PACKET cookie, raw, chhash, appcookie; | |
724 | WPACKET hrrpkt; | |
725 | const unsigned char *data, *mdin, *ciphdata; | |
726 | unsigned char hmac[SHA256_DIGEST_LENGTH]; | |
727 | unsigned char hrr[MAX_HRR_SIZE]; | |
728 | size_t rawlen, hmaclen, hrrlen, ciphlen; | |
d0debc0a | 729 | unsigned long tm, now; |
43054d3d MC |
730 | |
731 | /* Ignore any cookie if we're not set up to verify it */ | |
732 | if (s->ctx->app_verify_cookie_cb == NULL | |
733 | || (s->s3->flags & TLS1_FLAGS_STATELESS) == 0) | |
734 | return 1; | |
735 | ||
736 | if (!PACKET_as_length_prefixed_2(pkt, &cookie)) { | |
737 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
738 | SSL_R_LENGTH_MISMATCH); | |
739 | return 0; | |
740 | } | |
741 | ||
742 | raw = cookie; | |
743 | data = PACKET_data(&raw); | |
744 | rawlen = PACKET_remaining(&raw); | |
745 | if (rawlen < SHA256_DIGEST_LENGTH | |
746 | || !PACKET_forward(&raw, rawlen - SHA256_DIGEST_LENGTH)) { | |
747 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
748 | SSL_R_LENGTH_MISMATCH); | |
749 | return 0; | |
750 | } | |
751 | mdin = PACKET_data(&raw); | |
752 | ||
753 | /* Verify the HMAC of the cookie */ | |
754 | hctx = EVP_MD_CTX_create(); | |
755 | pkey = EVP_PKEY_new_mac_key(EVP_PKEY_HMAC, NULL, | |
756 | s->session_ctx->ext.cookie_hmac_key, | |
757 | sizeof(s->session_ctx->ext.cookie_hmac_key)); | |
758 | if (hctx == NULL || pkey == NULL) { | |
759 | EVP_MD_CTX_free(hctx); | |
760 | EVP_PKEY_free(pkey); | |
761 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
762 | ERR_R_MALLOC_FAILURE); | |
763 | return 0; | |
764 | } | |
765 | ||
97ea1e7f | 766 | hmaclen = SHA256_DIGEST_LENGTH; |
43054d3d | 767 | if (EVP_DigestSignInit(hctx, NULL, EVP_sha256(), NULL, pkey) <= 0 |
97ea1e7f MC |
768 | || EVP_DigestSign(hctx, hmac, &hmaclen, data, |
769 | rawlen - SHA256_DIGEST_LENGTH) <= 0 | |
43054d3d MC |
770 | || hmaclen != SHA256_DIGEST_LENGTH) { |
771 | EVP_MD_CTX_free(hctx); | |
772 | EVP_PKEY_free(pkey); | |
773 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
774 | ERR_R_INTERNAL_ERROR); | |
775 | return 0; | |
776 | } | |
777 | ||
778 | EVP_MD_CTX_free(hctx); | |
779 | EVP_PKEY_free(pkey); | |
780 | ||
781 | if (CRYPTO_memcmp(hmac, mdin, SHA256_DIGEST_LENGTH) != 0) { | |
782 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
783 | SSL_R_COOKIE_MISMATCH); | |
784 | return 0; | |
785 | } | |
786 | ||
787 | if (!PACKET_get_net_2(&cookie, &format)) { | |
788 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
789 | SSL_R_LENGTH_MISMATCH); | |
790 | return 0; | |
791 | } | |
792 | /* Check the cookie format is something we recognise. Ignore it if not */ | |
793 | if (format != COOKIE_STATE_FORMAT_VERSION) | |
794 | return 1; | |
795 | ||
796 | /* | |
797 | * The rest of these checks really shouldn't fail since we have verified the | |
798 | * HMAC above. | |
799 | */ | |
800 | ||
801 | /* Check the version number is sane */ | |
802 | if (!PACKET_get_net_2(&cookie, &version)) { | |
803 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
804 | SSL_R_LENGTH_MISMATCH); | |
805 | return 0; | |
806 | } | |
807 | if (version != TLS1_3_VERSION) { | |
808 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
809 | SSL_R_BAD_PROTOCOL_VERSION_NUMBER); | |
810 | return 0; | |
811 | } | |
812 | ||
dd77962e | 813 | if (!PACKET_get_net_2(&cookie, &group_id)) { |
43054d3d MC |
814 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, |
815 | SSL_R_LENGTH_MISMATCH); | |
816 | return 0; | |
817 | } | |
dd77962e | 818 | |
43054d3d MC |
819 | ciphdata = PACKET_data(&cookie); |
820 | if (!PACKET_forward(&cookie, 2)) { | |
821 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
822 | SSL_R_LENGTH_MISMATCH); | |
823 | return 0; | |
824 | } | |
dd77962e MC |
825 | if (group_id != s->s3->group_id |
826 | || s->s3->tmp.new_cipher | |
827 | != ssl_get_cipher_by_char(s, ciphdata, 0)) { | |
828 | /* | |
829 | * We chose a different cipher or group id this time around to what is | |
830 | * in the cookie. Something must have changed. | |
831 | */ | |
832 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
833 | SSL_R_BAD_CIPHER); | |
43054d3d MC |
834 | return 0; |
835 | } | |
836 | ||
837 | if (!PACKET_get_1(&cookie, &key_share) | |
d0debc0a | 838 | || !PACKET_get_net_4(&cookie, &tm) |
43054d3d MC |
839 | || !PACKET_get_length_prefixed_2(&cookie, &chhash) |
840 | || !PACKET_get_length_prefixed_1(&cookie, &appcookie) | |
841 | || PACKET_remaining(&cookie) != SHA256_DIGEST_LENGTH) { | |
842 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
843 | SSL_R_LENGTH_MISMATCH); | |
844 | return 0; | |
845 | } | |
846 | ||
d0debc0a MC |
847 | /* We tolerate a cookie age of up to 10 minutes (= 60 * 10 seconds) */ |
848 | now = (unsigned long)time(NULL); | |
849 | if (tm > now || (now - tm) > 600) { | |
850 | /* Cookie is stale. Ignore it */ | |
851 | return 1; | |
852 | } | |
853 | ||
43054d3d MC |
854 | /* Verify the app cookie */ |
855 | if (s->ctx->app_verify_cookie_cb(s, PACKET_data(&appcookie), | |
856 | PACKET_remaining(&appcookie)) == 0) { | |
857 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
858 | SSL_R_COOKIE_MISMATCH); | |
859 | return 0; | |
860 | } | |
861 | ||
862 | /* | |
863 | * Reconstruct the HRR that we would have sent in response to the original | |
864 | * ClientHello so we can add it to the transcript hash. | |
865 | * Note: This won't work with custom HRR extensions | |
866 | */ | |
867 | if (!WPACKET_init_static_len(&hrrpkt, hrr, sizeof(hrr), 0)) { | |
868 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
869 | ERR_R_INTERNAL_ERROR); | |
870 | return 0; | |
871 | } | |
872 | if (!WPACKET_put_bytes_u8(&hrrpkt, SSL3_MT_SERVER_HELLO) | |
873 | || !WPACKET_start_sub_packet_u24(&hrrpkt) | |
874 | || !WPACKET_put_bytes_u16(&hrrpkt, TLS1_2_VERSION) | |
875 | || !WPACKET_memcpy(&hrrpkt, hrrrandom, SSL3_RANDOM_SIZE) | |
876 | || !WPACKET_sub_memcpy_u8(&hrrpkt, s->tmp_session_id, | |
877 | s->tmp_session_id_len) | |
878 | || !s->method->put_cipher_by_char(s->s3->tmp.new_cipher, &hrrpkt, | |
879 | &ciphlen) | |
880 | || !WPACKET_put_bytes_u8(&hrrpkt, 0) | |
881 | || !WPACKET_start_sub_packet_u16(&hrrpkt)) { | |
882 | WPACKET_cleanup(&hrrpkt); | |
883 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
884 | ERR_R_INTERNAL_ERROR); | |
885 | return 0; | |
886 | } | |
887 | if (!WPACKET_put_bytes_u16(&hrrpkt, TLSEXT_TYPE_supported_versions) | |
888 | || !WPACKET_start_sub_packet_u16(&hrrpkt) | |
889 | /* TODO(TLS1.3): Fix this before release */ | |
890 | || !WPACKET_put_bytes_u16(&hrrpkt, TLS1_3_VERSION_DRAFT) | |
891 | || !WPACKET_close(&hrrpkt)) { | |
892 | WPACKET_cleanup(&hrrpkt); | |
893 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
894 | ERR_R_INTERNAL_ERROR); | |
895 | return 0; | |
896 | } | |
897 | if (key_share) { | |
898 | if (!WPACKET_put_bytes_u16(&hrrpkt, TLSEXT_TYPE_key_share) | |
899 | || !WPACKET_start_sub_packet_u16(&hrrpkt) | |
900 | || !WPACKET_put_bytes_u16(&hrrpkt, s->s3->group_id) | |
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 | } | |
908 | if (!WPACKET_put_bytes_u16(&hrrpkt, TLSEXT_TYPE_cookie) | |
909 | || !WPACKET_start_sub_packet_u16(&hrrpkt) | |
910 | || !WPACKET_sub_memcpy_u16(&hrrpkt, data, rawlen) | |
911 | || !WPACKET_close(&hrrpkt) /* cookie extension */ | |
912 | || !WPACKET_close(&hrrpkt) /* extension block */ | |
913 | || !WPACKET_close(&hrrpkt) /* message */ | |
914 | || !WPACKET_get_total_written(&hrrpkt, &hrrlen) | |
915 | || !WPACKET_finish(&hrrpkt)) { | |
916 | WPACKET_cleanup(&hrrpkt); | |
917 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_COOKIE, | |
918 | ERR_R_INTERNAL_ERROR); | |
919 | return 0; | |
920 | } | |
921 | ||
922 | /* Reconstruct the transcript hash */ | |
923 | if (!create_synthetic_message_hash(s, PACKET_data(&chhash), | |
924 | PACKET_remaining(&chhash), hrr, | |
925 | hrrlen)) { | |
926 | /* SSLfatal() already called */ | |
927 | return 0; | |
928 | } | |
929 | ||
930 | /* Act as if this ClientHello came after a HelloRetryRequest */ | |
931 | s->hello_retry_request = 1; | |
932 | ||
c36001c3 MC |
933 | s->ext.cookieok = 1; |
934 | ||
43054d3d MC |
935 | return 1; |
936 | } | |
937 | ||
25670f3e | 938 | #ifndef OPENSSL_NO_EC |
61138358 | 939 | int tls_parse_ctos_supported_groups(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 940 | X509 *x, size_t chainidx) |
25670f3e MC |
941 | { |
942 | PACKET supported_groups_list; | |
943 | ||
944 | /* Each group is 2 bytes and we must have at least 1. */ | |
945 | if (!PACKET_as_length_prefixed_2(pkt, &supported_groups_list) | |
946 | || PACKET_remaining(&supported_groups_list) == 0 | |
947 | || (PACKET_remaining(&supported_groups_list) % 2) != 0) { | |
f63a17d6 MC |
948 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
949 | SSL_F_TLS_PARSE_CTOS_SUPPORTED_GROUPS, SSL_R_BAD_EXTENSION); | |
25670f3e MC |
950 | return 0; |
951 | } | |
952 | ||
e3743355 BK |
953 | if (!s->hit || SSL_IS_TLS13(s)) { |
954 | OPENSSL_free(s->session->ext.supportedgroups); | |
955 | s->session->ext.supportedgroups = NULL; | |
956 | s->session->ext.supportedgroups_len = 0; | |
9e84a42d | 957 | if (!tls1_save_u16(&supported_groups_list, |
e3743355 BK |
958 | &s->session->ext.supportedgroups, |
959 | &s->session->ext.supportedgroups_len)) { | |
f63a17d6 MC |
960 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
961 | SSL_F_TLS_PARSE_CTOS_SUPPORTED_GROUPS, | |
962 | ERR_R_INTERNAL_ERROR); | |
e3743355 BK |
963 | return 0; |
964 | } | |
25670f3e MC |
965 | } |
966 | ||
967 | return 1; | |
968 | } | |
969 | #endif | |
970 | ||
61138358 | 971 | int tls_parse_ctos_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 972 | size_t chainidx) |
25670f3e MC |
973 | { |
974 | /* The extension must always be empty */ | |
975 | if (PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
976 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
977 | SSL_F_TLS_PARSE_CTOS_EMS, SSL_R_BAD_EXTENSION); | |
25670f3e MC |
978 | return 0; |
979 | } | |
980 | ||
981 | s->s3->flags |= TLS1_FLAGS_RECEIVED_EXTMS; | |
982 | ||
983 | return 1; | |
984 | } | |
7da160b0 | 985 | |
38df5a45 MC |
986 | |
987 | int tls_parse_ctos_early_data(SSL *s, PACKET *pkt, unsigned int context, | |
f63a17d6 | 988 | X509 *x, size_t chainidx) |
38df5a45 MC |
989 | { |
990 | if (PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
991 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
992 | SSL_F_TLS_PARSE_CTOS_EARLY_DATA, SSL_R_BAD_EXTENSION); | |
38df5a45 MC |
993 | return 0; |
994 | } | |
995 | ||
fc7129dc | 996 | if (s->hello_retry_request != SSL_HRR_NONE) { |
f63a17d6 MC |
997 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
998 | SSL_F_TLS_PARSE_CTOS_EARLY_DATA, SSL_R_BAD_EXTENSION); | |
d4504fe5 MC |
999 | return 0; |
1000 | } | |
1001 | ||
38df5a45 MC |
1002 | return 1; |
1003 | } | |
1004 | ||
61138358 | 1005 | int tls_parse_ctos_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1006 | size_t chainidx) |
1053a6e2 MC |
1007 | { |
1008 | PACKET identities, binders, binder; | |
1009 | size_t binderoffset, hashsize; | |
1010 | SSL_SESSION *sess = NULL; | |
3a7c56b2 | 1011 | unsigned int id, i, ext = 0; |
1053a6e2 MC |
1012 | const EVP_MD *md = NULL; |
1013 | ||
1a9f457c MC |
1014 | /* |
1015 | * If we have no PSK kex mode that we recognise then we can't resume so | |
1016 | * ignore this extension | |
1017 | */ | |
1018 | if ((s->ext.psk_kex_mode | |
1019 | & (TLSEXT_KEX_MODE_FLAG_KE | TLSEXT_KEX_MODE_FLAG_KE_DHE)) == 0) | |
1020 | return 1; | |
1021 | ||
1053a6e2 | 1022 | if (!PACKET_get_length_prefixed_2(pkt, &identities)) { |
f63a17d6 MC |
1023 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
1024 | SSL_F_TLS_PARSE_CTOS_PSK, SSL_R_BAD_EXTENSION); | |
1053a6e2 MC |
1025 | return 0; |
1026 | } | |
1027 | ||
1028 | for (id = 0; PACKET_remaining(&identities) != 0; id++) { | |
1029 | PACKET identity; | |
2c604cb9 | 1030 | unsigned long ticket_agel; |
1053a6e2 MC |
1031 | |
1032 | if (!PACKET_get_length_prefixed_2(&identities, &identity) | |
2c604cb9 | 1033 | || !PACKET_get_net_4(&identities, &ticket_agel)) { |
f63a17d6 MC |
1034 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
1035 | SSL_F_TLS_PARSE_CTOS_PSK, SSL_R_BAD_EXTENSION); | |
1053a6e2 MC |
1036 | return 0; |
1037 | } | |
1038 | ||
3a7c56b2 | 1039 | if (s->psk_find_session_cb != NULL |
011d768a MC |
1040 | && !s->psk_find_session_cb(s, PACKET_data(&identity), |
1041 | PACKET_remaining(&identity), | |
1042 | &sess)) { | |
f63a17d6 MC |
1043 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1044 | SSL_F_TLS_PARSE_CTOS_PSK, SSL_R_BAD_EXTENSION); | |
011d768a MC |
1045 | return 0; |
1046 | } | |
1047 | ||
1048 | if (sess != NULL) { | |
1049 | /* We found a PSK */ | |
3a7c56b2 | 1050 | SSL_SESSION *sesstmp = ssl_session_dup(sess, 0); |
1b8bacff | 1051 | |
3a7c56b2 | 1052 | if (sesstmp == NULL) { |
f63a17d6 MC |
1053 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1054 | SSL_F_TLS_PARSE_CTOS_PSK, ERR_R_INTERNAL_ERROR); | |
3a7c56b2 MC |
1055 | return 0; |
1056 | } | |
1057 | SSL_SESSION_free(sess); | |
1058 | sess = sesstmp; | |
1059 | ||
1060 | /* | |
1061 | * We've just been told to use this session for this context so | |
1062 | * make sure the sid_ctx matches up. | |
1063 | */ | |
1064 | memcpy(sess->sid_ctx, s->sid_ctx, s->sid_ctx_length); | |
1065 | sess->sid_ctx_length = s->sid_ctx_length; | |
1066 | ext = 1; | |
630369d9 MC |
1067 | if (id == 0) |
1068 | s->ext.early_data_ok = 1; | |
3a7c56b2 MC |
1069 | } else { |
1070 | uint32_t ticket_age = 0, now, agesec, agems; | |
1071 | int ret = tls_decrypt_ticket(s, PACKET_data(&identity), | |
1072 | PACKET_remaining(&identity), NULL, 0, | |
1073 | &sess); | |
1074 | ||
1075 | if (ret == TICKET_FATAL_ERR_MALLOC | |
1076 | || ret == TICKET_FATAL_ERR_OTHER) { | |
f63a17d6 MC |
1077 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1078 | SSL_F_TLS_PARSE_CTOS_PSK, ERR_R_INTERNAL_ERROR); | |
3a7c56b2 MC |
1079 | return 0; |
1080 | } | |
1081 | if (ret == TICKET_NO_DECRYPT) | |
1082 | continue; | |
1083 | ||
1084 | ticket_age = (uint32_t)ticket_agel; | |
1085 | now = (uint32_t)time(NULL); | |
1086 | agesec = now - (uint32_t)sess->time; | |
1087 | agems = agesec * (uint32_t)1000; | |
1088 | ticket_age -= sess->ext.tick_age_add; | |
1089 | ||
1090 | /* | |
1091 | * For simplicity we do our age calculations in seconds. If the | |
1092 | * client does it in ms then it could appear that their ticket age | |
1093 | * is longer than ours (our ticket age calculation should always be | |
1094 | * slightly longer than the client's due to the network latency). | |
1095 | * Therefore we add 1000ms to our age calculation to adjust for | |
1096 | * rounding errors. | |
1097 | */ | |
630369d9 MC |
1098 | if (id == 0 |
1099 | && sess->timeout >= (long)agesec | |
3a7c56b2 MC |
1100 | && agems / (uint32_t)1000 == agesec |
1101 | && ticket_age <= agems + 1000 | |
1102 | && ticket_age + TICKET_AGE_ALLOWANCE >= agems + 1000) { | |
1103 | /* | |
1104 | * Ticket age is within tolerance and not expired. We allow it | |
1105 | * for early data | |
1106 | */ | |
1107 | s->ext.early_data_ok = 1; | |
1108 | } | |
1053a6e2 | 1109 | } |
1053a6e2 | 1110 | |
534a43ff | 1111 | md = ssl_md(sess->cipher->algorithm2); |
0de6d66d MC |
1112 | if (md != ssl_md(s->s3->tmp.new_cipher->algorithm2)) { |
1113 | /* The ciphersuite is not compatible with this session. */ | |
1053a6e2 MC |
1114 | SSL_SESSION_free(sess); |
1115 | sess = NULL; | |
630369d9 | 1116 | s->ext.early_data_ok = 0; |
1053a6e2 MC |
1117 | continue; |
1118 | } | |
1053a6e2 MC |
1119 | break; |
1120 | } | |
1121 | ||
1122 | if (sess == NULL) | |
1123 | return 1; | |
1124 | ||
1125 | binderoffset = PACKET_data(pkt) - (const unsigned char *)s->init_buf->data; | |
1053a6e2 MC |
1126 | hashsize = EVP_MD_size(md); |
1127 | ||
1128 | if (!PACKET_get_length_prefixed_2(pkt, &binders)) { | |
f63a17d6 MC |
1129 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_PSK, |
1130 | SSL_R_BAD_EXTENSION); | |
1053a6e2 MC |
1131 | goto err; |
1132 | } | |
1133 | ||
1134 | for (i = 0; i <= id; i++) { | |
1135 | if (!PACKET_get_length_prefixed_1(&binders, &binder)) { | |
f63a17d6 MC |
1136 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_PSK, |
1137 | SSL_R_BAD_EXTENSION); | |
1053a6e2 MC |
1138 | goto err; |
1139 | } | |
1140 | } | |
1141 | ||
2894e9cb MC |
1142 | if (PACKET_remaining(&binder) != hashsize) { |
1143 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_PSK, | |
1144 | SSL_R_BAD_EXTENSION); | |
1145 | goto err; | |
1146 | } | |
1147 | if (tls_psk_do_binder(s, md, (const unsigned char *)s->init_buf->data, | |
1148 | binderoffset, PACKET_data(&binder), NULL, sess, 0, | |
1149 | ext) != 1) { | |
635c8f77 | 1150 | /* SSLfatal() already called */ |
1053a6e2 MC |
1151 | goto err; |
1152 | } | |
1153 | ||
1154 | sess->ext.tick_identity = id; | |
2c604cb9 | 1155 | |
1053a6e2 MC |
1156 | SSL_SESSION_free(s->session); |
1157 | s->session = sess; | |
1053a6e2 MC |
1158 | return 1; |
1159 | err: | |
312e9387 | 1160 | SSL_SESSION_free(sess); |
1053a6e2 MC |
1161 | return 0; |
1162 | } | |
1163 | ||
1266eefd MC |
1164 | /* |
1165 | * Add the server's renegotiation binding | |
1166 | */ | |
b186a592 MC |
1167 | EXT_RETURN tls_construct_stoc_renegotiate(SSL *s, WPACKET *pkt, |
1168 | unsigned int context, X509 *x, | |
f63a17d6 | 1169 | size_t chainidx) |
7da160b0 MC |
1170 | { |
1171 | if (!s->s3->send_connection_binding) | |
b186a592 | 1172 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 1173 | |
db0f35dd | 1174 | /* Still add this even if SSL_OP_NO_RENEGOTIATION is set */ |
7da160b0 MC |
1175 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_renegotiate) |
1176 | || !WPACKET_start_sub_packet_u16(pkt) | |
1177 | || !WPACKET_start_sub_packet_u8(pkt) | |
1178 | || !WPACKET_memcpy(pkt, s->s3->previous_client_finished, | |
1179 | s->s3->previous_client_finished_len) | |
1180 | || !WPACKET_memcpy(pkt, s->s3->previous_server_finished, | |
1181 | s->s3->previous_server_finished_len) | |
1182 | || !WPACKET_close(pkt) | |
1183 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
1184 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_RENEGOTIATE, |
1185 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1186 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1187 | } |
1188 | ||
b186a592 | 1189 | return EXT_RETURN_SENT; |
7da160b0 MC |
1190 | } |
1191 | ||
b186a592 MC |
1192 | EXT_RETURN tls_construct_stoc_server_name(SSL *s, WPACKET *pkt, |
1193 | unsigned int context, X509 *x, | |
f63a17d6 | 1194 | size_t chainidx) |
7da160b0 MC |
1195 | { |
1196 | if (s->hit || s->servername_done != 1 | |
aff8c126 | 1197 | || s->session->ext.hostname == NULL) |
b186a592 | 1198 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1199 | |
1200 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_server_name) | |
1201 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
f63a17d6 MC |
1202 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_SERVER_NAME, |
1203 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1204 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1205 | } |
1206 | ||
b186a592 | 1207 | return EXT_RETURN_SENT; |
7da160b0 MC |
1208 | } |
1209 | ||
cf72c757 F |
1210 | /* Add/include the server's max fragment len extension into ServerHello */ |
1211 | EXT_RETURN tls_construct_stoc_maxfragmentlen(SSL *s, WPACKET *pkt, | |
1212 | unsigned int context, X509 *x, | |
f63a17d6 | 1213 | size_t chainidx) |
cf72c757 F |
1214 | { |
1215 | if (!USE_MAX_FRAGMENT_LENGTH_EXT(s->session)) | |
1216 | return EXT_RETURN_NOT_SENT; | |
1217 | ||
1218 | /*- | |
1219 | * 4 bytes for this extension type and extension length | |
1220 | * 1 byte for the Max Fragment Length code value. | |
1221 | */ | |
1222 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_max_fragment_length) | |
1223 | || !WPACKET_start_sub_packet_u16(pkt) | |
1224 | || !WPACKET_put_bytes_u8(pkt, s->session->ext.max_fragment_len_mode) | |
1225 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
1226 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1227 | SSL_F_TLS_CONSTRUCT_STOC_MAXFRAGMENTLEN, ERR_R_INTERNAL_ERROR); | |
cf72c757 F |
1228 | return EXT_RETURN_FAIL; |
1229 | } | |
1230 | ||
1231 | return EXT_RETURN_SENT; | |
1232 | } | |
1233 | ||
7da160b0 | 1234 | #ifndef OPENSSL_NO_EC |
b186a592 MC |
1235 | EXT_RETURN tls_construct_stoc_ec_pt_formats(SSL *s, WPACKET *pkt, |
1236 | unsigned int context, X509 *x, | |
f63a17d6 | 1237 | size_t chainidx) |
7da160b0 MC |
1238 | { |
1239 | unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
1240 | unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
89247375 | 1241 | int using_ecc = ((alg_k & SSL_kECDHE) || (alg_a & SSL_aECDSA)) |
aff8c126 | 1242 | && (s->session->ext.ecpointformats != NULL); |
7da160b0 MC |
1243 | const unsigned char *plist; |
1244 | size_t plistlen; | |
1245 | ||
1246 | if (!using_ecc) | |
b186a592 | 1247 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1248 | |
1249 | tls1_get_formatlist(s, &plist, &plistlen); | |
7da160b0 MC |
1250 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_ec_point_formats) |
1251 | || !WPACKET_start_sub_packet_u16(pkt) | |
1252 | || !WPACKET_sub_memcpy_u8(pkt, plist, plistlen) | |
1253 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
1254 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1255 | SSL_F_TLS_CONSTRUCT_STOC_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1256 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1257 | } |
1258 | ||
b186a592 | 1259 | return EXT_RETURN_SENT; |
7da160b0 MC |
1260 | } |
1261 | #endif | |
1262 | ||
cf53cbea | 1263 | #ifndef OPENSSL_NO_EC |
b186a592 MC |
1264 | EXT_RETURN tls_construct_stoc_supported_groups(SSL *s, WPACKET *pkt, |
1265 | unsigned int context, X509 *x, | |
f63a17d6 | 1266 | size_t chainidx) |
6af87546 | 1267 | { |
9e84a42d | 1268 | const uint16_t *groups; |
6af87546 MC |
1269 | size_t numgroups, i, first = 1; |
1270 | ||
1271 | /* s->s3->group_id is non zero if we accepted a key_share */ | |
1272 | if (s->s3->group_id == 0) | |
b186a592 | 1273 | return EXT_RETURN_NOT_SENT; |
6af87546 MC |
1274 | |
1275 | /* Get our list of supported groups */ | |
ff6d20a6 | 1276 | tls1_get_supported_groups(s, &groups, &numgroups); |
34e5292c | 1277 | if (numgroups == 0) { |
f63a17d6 MC |
1278 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1279 | SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1280 | return EXT_RETURN_FAIL; |
6af87546 MC |
1281 | } |
1282 | ||
1283 | /* Copy group ID if supported */ | |
9e84a42d DSH |
1284 | for (i = 0; i < numgroups; i++) { |
1285 | uint16_t group = groups[i]; | |
1286 | ||
1287 | if (tls_curve_allowed(s, group, SSL_SECOP_CURVE_SUPPORTED)) { | |
6af87546 MC |
1288 | if (first) { |
1289 | /* | |
1290 | * Check if the client is already using our preferred group. If | |
1291 | * so we don't need to add this extension | |
1292 | */ | |
9e84a42d | 1293 | if (s->s3->group_id == group) |
b186a592 | 1294 | return EXT_RETURN_NOT_SENT; |
6af87546 MC |
1295 | |
1296 | /* Add extension header */ | |
1297 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_groups) | |
1298 | /* Sub-packet for supported_groups extension */ | |
1299 | || !WPACKET_start_sub_packet_u16(pkt) | |
1300 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
f63a17d6 MC |
1301 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1302 | SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS, | |
1303 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1304 | return EXT_RETURN_FAIL; |
6af87546 MC |
1305 | } |
1306 | ||
1307 | first = 0; | |
1308 | } | |
9e84a42d | 1309 | if (!WPACKET_put_bytes_u16(pkt, group)) { |
f63a17d6 MC |
1310 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1311 | SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS, | |
1312 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1313 | return EXT_RETURN_FAIL; |
6af87546 MC |
1314 | } |
1315 | } | |
1316 | } | |
1317 | ||
1318 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
1319 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1320 | SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS, | |
1321 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1322 | return EXT_RETURN_FAIL; |
6af87546 MC |
1323 | } |
1324 | ||
b186a592 | 1325 | return EXT_RETURN_SENT; |
6af87546 | 1326 | } |
cf53cbea | 1327 | #endif |
6af87546 | 1328 | |
b186a592 MC |
1329 | EXT_RETURN tls_construct_stoc_session_ticket(SSL *s, WPACKET *pkt, |
1330 | unsigned int context, X509 *x, | |
f63a17d6 | 1331 | size_t chainidx) |
7da160b0 | 1332 | { |
aff8c126 RS |
1333 | if (!s->ext.ticket_expected || !tls_use_ticket(s)) { |
1334 | s->ext.ticket_expected = 0; | |
b186a592 | 1335 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1336 | } |
1337 | ||
1338 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket) | |
1339 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
f63a17d6 MC |
1340 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1341 | SSL_F_TLS_CONSTRUCT_STOC_SESSION_TICKET, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1342 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1343 | } |
1344 | ||
b186a592 | 1345 | return EXT_RETURN_SENT; |
7da160b0 MC |
1346 | } |
1347 | ||
ab83e314 | 1348 | #ifndef OPENSSL_NO_OCSP |
b186a592 MC |
1349 | EXT_RETURN tls_construct_stoc_status_request(SSL *s, WPACKET *pkt, |
1350 | unsigned int context, X509 *x, | |
f63a17d6 | 1351 | size_t chainidx) |
7da160b0 | 1352 | { |
aff8c126 | 1353 | if (!s->ext.status_expected) |
b186a592 | 1354 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 1355 | |
8521ced6 | 1356 | if (SSL_IS_TLS13(s) && chainidx != 0) |
b186a592 | 1357 | return EXT_RETURN_NOT_SENT; |
e96e0f8e | 1358 | |
7da160b0 | 1359 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request) |
f63e4288 | 1360 | || !WPACKET_start_sub_packet_u16(pkt)) { |
f63a17d6 MC |
1361 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1362 | SSL_F_TLS_CONSTRUCT_STOC_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1363 | return EXT_RETURN_FAIL; |
f63e4288 MC |
1364 | } |
1365 | ||
1366 | /* | |
1367 | * In TLSv1.3 we include the certificate status itself. In <= TLSv1.2 we | |
1368 | * send back an empty extension, with the certificate status appearing as a | |
1369 | * separate message | |
1370 | */ | |
3ec8d113 MC |
1371 | if (SSL_IS_TLS13(s) && !tls_construct_cert_status_body(s, pkt)) { |
1372 | /* SSLfatal() already called */ | |
56d36288 | 1373 | return EXT_RETURN_FAIL; |
3ec8d113 MC |
1374 | } |
1375 | if (!WPACKET_close(pkt)) { | |
f63a17d6 MC |
1376 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1377 | SSL_F_TLS_CONSTRUCT_STOC_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1378 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1379 | } |
1380 | ||
b186a592 | 1381 | return EXT_RETURN_SENT; |
7da160b0 | 1382 | } |
ab83e314 | 1383 | #endif |
7da160b0 | 1384 | |
7da160b0 | 1385 | #ifndef OPENSSL_NO_NEXTPROTONEG |
b186a592 MC |
1386 | EXT_RETURN tls_construct_stoc_next_proto_neg(SSL *s, WPACKET *pkt, |
1387 | unsigned int context, X509 *x, | |
f63a17d6 | 1388 | size_t chainidx) |
7da160b0 MC |
1389 | { |
1390 | const unsigned char *npa; | |
1391 | unsigned int npalen; | |
1392 | int ret; | |
aff8c126 | 1393 | int npn_seen = s->s3->npn_seen; |
7da160b0 | 1394 | |
aff8c126 RS |
1395 | s->s3->npn_seen = 0; |
1396 | if (!npn_seen || s->ctx->ext.npn_advertised_cb == NULL) | |
b186a592 | 1397 | return EXT_RETURN_NOT_SENT; |
7da160b0 | 1398 | |
aff8c126 RS |
1399 | ret = s->ctx->ext.npn_advertised_cb(s, &npa, &npalen, |
1400 | s->ctx->ext.npn_advertised_cb_arg); | |
7da160b0 MC |
1401 | if (ret == SSL_TLSEXT_ERR_OK) { |
1402 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_next_proto_neg) | |
1403 | || !WPACKET_sub_memcpy_u16(pkt, npa, npalen)) { | |
f63a17d6 MC |
1404 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1405 | SSL_F_TLS_CONSTRUCT_STOC_NEXT_PROTO_NEG, | |
1406 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1407 | return EXT_RETURN_FAIL; |
7da160b0 | 1408 | } |
aff8c126 | 1409 | s->s3->npn_seen = 1; |
7da160b0 MC |
1410 | } |
1411 | ||
b186a592 | 1412 | return EXT_RETURN_SENT; |
7da160b0 MC |
1413 | } |
1414 | #endif | |
1415 | ||
b186a592 | 1416 | EXT_RETURN tls_construct_stoc_alpn(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 1417 | X509 *x, size_t chainidx) |
7da160b0 MC |
1418 | { |
1419 | if (s->s3->alpn_selected == NULL) | |
b186a592 | 1420 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1421 | |
1422 | if (!WPACKET_put_bytes_u16(pkt, | |
1423 | TLSEXT_TYPE_application_layer_protocol_negotiation) | |
1424 | || !WPACKET_start_sub_packet_u16(pkt) | |
1425 | || !WPACKET_start_sub_packet_u16(pkt) | |
1426 | || !WPACKET_sub_memcpy_u8(pkt, s->s3->alpn_selected, | |
1427 | s->s3->alpn_selected_len) | |
1428 | || !WPACKET_close(pkt) | |
1429 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
1430 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1431 | SSL_F_TLS_CONSTRUCT_STOC_ALPN, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1432 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1433 | } |
1434 | ||
b186a592 | 1435 | return EXT_RETURN_SENT; |
7da160b0 MC |
1436 | } |
1437 | ||
1438 | #ifndef OPENSSL_NO_SRTP | |
b186a592 MC |
1439 | EXT_RETURN tls_construct_stoc_use_srtp(SSL *s, WPACKET *pkt, |
1440 | unsigned int context, X509 *x, | |
f63a17d6 | 1441 | size_t chainidx) |
7da160b0 MC |
1442 | { |
1443 | if (s->srtp_profile == NULL) | |
b186a592 | 1444 | return EXT_RETURN_NOT_SENT; |
a1448c26 | 1445 | |
7da160b0 MC |
1446 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp) |
1447 | || !WPACKET_start_sub_packet_u16(pkt) | |
1448 | || !WPACKET_put_bytes_u16(pkt, 2) | |
1449 | || !WPACKET_put_bytes_u16(pkt, s->srtp_profile->id) | |
1450 | || !WPACKET_put_bytes_u8(pkt, 0) | |
1451 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
1452 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_USE_SRTP, |
1453 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1454 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1455 | } |
1456 | ||
b186a592 | 1457 | return EXT_RETURN_SENT; |
7da160b0 MC |
1458 | } |
1459 | #endif | |
1460 | ||
b186a592 | 1461 | EXT_RETURN tls_construct_stoc_etm(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 1462 | X509 *x, size_t chainidx) |
7da160b0 | 1463 | { |
28a31a0a | 1464 | if (!s->ext.use_etm) |
b186a592 | 1465 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1466 | |
1467 | /* | |
1468 | * Don't use encrypt_then_mac if AEAD or RC4 might want to disable | |
1469 | * for other cases too. | |
1470 | */ | |
1471 | if (s->s3->tmp.new_cipher->algorithm_mac == SSL_AEAD | |
1472 | || s->s3->tmp.new_cipher->algorithm_enc == SSL_RC4 | |
1473 | || s->s3->tmp.new_cipher->algorithm_enc == SSL_eGOST2814789CNT | |
1474 | || s->s3->tmp.new_cipher->algorithm_enc == SSL_eGOST2814789CNT12) { | |
28a31a0a | 1475 | s->ext.use_etm = 0; |
b186a592 | 1476 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1477 | } |
1478 | ||
1479 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac) | |
1480 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
f63a17d6 MC |
1481 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_ETM, |
1482 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1483 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1484 | } |
1485 | ||
b186a592 | 1486 | return EXT_RETURN_SENT; |
7da160b0 MC |
1487 | } |
1488 | ||
b186a592 | 1489 | EXT_RETURN tls_construct_stoc_ems(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 1490 | X509 *x, size_t chainidx) |
7da160b0 MC |
1491 | { |
1492 | if ((s->s3->flags & TLS1_FLAGS_RECEIVED_EXTMS) == 0) | |
b186a592 | 1493 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1494 | |
1495 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret) | |
1496 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
f63a17d6 MC |
1497 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_EMS, |
1498 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1499 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1500 | } |
1501 | ||
b186a592 | 1502 | return EXT_RETURN_SENT; |
7da160b0 MC |
1503 | } |
1504 | ||
88050dd1 MC |
1505 | EXT_RETURN tls_construct_stoc_supported_versions(SSL *s, WPACKET *pkt, |
1506 | unsigned int context, X509 *x, | |
1507 | size_t chainidx) | |
1508 | { | |
1509 | if (!SSL_IS_TLS13(s)) | |
1510 | return EXT_RETURN_NOT_SENT; | |
1511 | ||
1512 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_versions) | |
1513 | || !WPACKET_start_sub_packet_u16(pkt) | |
1514 | /* TODO(TLS1.3): Update to remove the TLSv1.3 draft indicator */ | |
1515 | || !WPACKET_put_bytes_u16(pkt, TLS1_3_VERSION_DRAFT) | |
1516 | || !WPACKET_close(pkt)) { | |
1517 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
1518 | SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_VERSIONS, | |
1519 | ERR_R_INTERNAL_ERROR); | |
1520 | return EXT_RETURN_FAIL; | |
1521 | } | |
1522 | ||
1523 | return EXT_RETURN_SENT; | |
1524 | } | |
1525 | ||
b186a592 MC |
1526 | EXT_RETURN tls_construct_stoc_key_share(SSL *s, WPACKET *pkt, |
1527 | unsigned int context, X509 *x, | |
f63a17d6 | 1528 | size_t chainidx) |
7da160b0 | 1529 | { |
3cf96e88 | 1530 | #ifndef OPENSSL_NO_TLS1_3 |
7da160b0 MC |
1531 | unsigned char *encodedPoint; |
1532 | size_t encoded_pt_len = 0; | |
1533 | EVP_PKEY *ckey = s->s3->peer_tmp, *skey = NULL; | |
1534 | ||
dd77962e MC |
1535 | if (s->hello_retry_request == SSL_HRR_PENDING) { |
1536 | if (ckey != NULL) { | |
1537 | /* Original key_share was acceptable so don't ask for another one */ | |
1538 | return EXT_RETURN_NOT_SENT; | |
1539 | } | |
1540 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
1541 | || !WPACKET_start_sub_packet_u16(pkt) | |
1542 | || !WPACKET_put_bytes_u16(pkt, s->s3->group_id) | |
1543 | || !WPACKET_close(pkt)) { | |
1544 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
1545 | SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, | |
1546 | ERR_R_INTERNAL_ERROR); | |
1547 | return EXT_RETURN_FAIL; | |
7d061fce MC |
1548 | } |
1549 | ||
dd77962e MC |
1550 | return EXT_RETURN_SENT; |
1551 | } | |
1552 | ||
1553 | if (ckey == NULL) { | |
1554 | /* No key_share received from client - must be resuming */ | |
0247086d | 1555 | if (!s->hit || !tls13_generate_handshake_secret(s, NULL, 0)) { |
f63a17d6 MC |
1556 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1557 | SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1558 | return EXT_RETURN_FAIL; |
0247086d | 1559 | } |
b186a592 | 1560 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1561 | } |
1562 | ||
1563 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
1564 | || !WPACKET_start_sub_packet_u16(pkt) | |
1565 | || !WPACKET_put_bytes_u16(pkt, s->s3->group_id)) { | |
f63a17d6 MC |
1566 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1567 | SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1568 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1569 | } |
1570 | ||
1571 | skey = ssl_generate_pkey(ckey); | |
1572 | if (skey == NULL) { | |
f63a17d6 MC |
1573 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, |
1574 | ERR_R_MALLOC_FAILURE); | |
b186a592 | 1575 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1576 | } |
1577 | ||
1578 | /* Generate encoding of server key */ | |
1579 | encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(skey, &encodedPoint); | |
1580 | if (encoded_pt_len == 0) { | |
f63a17d6 MC |
1581 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, |
1582 | ERR_R_EC_LIB); | |
7da160b0 | 1583 | EVP_PKEY_free(skey); |
b186a592 | 1584 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1585 | } |
1586 | ||
1587 | if (!WPACKET_sub_memcpy_u16(pkt, encodedPoint, encoded_pt_len) | |
1588 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
1589 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, |
1590 | ERR_R_INTERNAL_ERROR); | |
7da160b0 MC |
1591 | EVP_PKEY_free(skey); |
1592 | OPENSSL_free(encodedPoint); | |
b186a592 | 1593 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1594 | } |
1595 | OPENSSL_free(encodedPoint); | |
1596 | ||
1597 | /* This causes the crypto state to be updated based on the derived keys */ | |
1598 | s->s3->tmp.pkey = skey; | |
1599 | if (ssl_derive(s, skey, ckey, 1) == 0) { | |
f63a17d6 | 1600 | /* SSLfatal() already called */ |
b186a592 | 1601 | return EXT_RETURN_FAIL; |
7da160b0 | 1602 | } |
3cf96e88 | 1603 | #endif |
7da160b0 | 1604 | |
b186a592 | 1605 | return EXT_RETURN_SENT; |
7da160b0 MC |
1606 | } |
1607 | ||
43054d3d MC |
1608 | EXT_RETURN tls_construct_stoc_cookie(SSL *s, WPACKET *pkt, unsigned int context, |
1609 | X509 *x, size_t chainidx) | |
1610 | { | |
1611 | unsigned char *hashval1, *hashval2, *appcookie1, *appcookie2, *cookie; | |
1612 | unsigned char *hmac, *hmac2; | |
1613 | size_t startlen, ciphlen, totcookielen, hashlen, hmaclen; | |
1614 | unsigned int appcookielen; | |
1615 | EVP_MD_CTX *hctx; | |
1616 | EVP_PKEY *pkey; | |
1617 | int ret = EXT_RETURN_FAIL; | |
1618 | ||
1619 | if (s->ctx->app_gen_cookie_cb == NULL | |
1620 | || (s->s3->flags & TLS1_FLAGS_STATELESS) == 0) | |
1621 | return EXT_RETURN_NOT_SENT; | |
1622 | ||
1623 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_cookie) | |
1624 | || !WPACKET_start_sub_packet_u16(pkt) | |
1625 | || !WPACKET_start_sub_packet_u16(pkt) | |
1626 | || !WPACKET_get_total_written(pkt, &startlen) | |
1627 | || !WPACKET_reserve_bytes(pkt, MAX_COOKIE_SIZE, &cookie) | |
1628 | || !WPACKET_put_bytes_u16(pkt, COOKIE_STATE_FORMAT_VERSION) | |
1629 | || !WPACKET_put_bytes_u16(pkt, TLS1_3_VERSION) | |
1630 | || !WPACKET_put_bytes_u16(pkt, s->s3->group_id) | |
1631 | || !s->method->put_cipher_by_char(s->s3->tmp.new_cipher, pkt, | |
1632 | &ciphlen) | |
1633 | /* Is there a key_share extension present in this HRR? */ | |
1634 | || !WPACKET_put_bytes_u8(pkt, s->s3->peer_tmp == NULL) | |
d0debc0a | 1635 | || !WPACKET_put_bytes_u32(pkt, (unsigned int)time(NULL)) |
43054d3d MC |
1636 | || !WPACKET_start_sub_packet_u16(pkt) |
1637 | || !WPACKET_reserve_bytes(pkt, EVP_MAX_MD_SIZE, &hashval1)) { | |
1638 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_COOKIE, | |
1639 | ERR_R_INTERNAL_ERROR); | |
1640 | return EXT_RETURN_FAIL; | |
1641 | } | |
1642 | ||
1643 | /* | |
1644 | * Get the hash of the initial ClientHello. ssl_handshake_hash() operates | |
1645 | * on raw buffers, so we first reserve sufficient bytes (above) and then | |
1646 | * subsequently allocate them (below) | |
1647 | */ | |
1648 | if (!ssl3_digest_cached_records(s, 0) | |
1649 | || !ssl_handshake_hash(s, hashval1, EVP_MAX_MD_SIZE, &hashlen)) { | |
1650 | /* SSLfatal() already called */ | |
1651 | return EXT_RETURN_FAIL; | |
1652 | } | |
1653 | ||
1654 | if (!WPACKET_allocate_bytes(pkt, hashlen, &hashval2) | |
1655 | || !ossl_assert(hashval1 == hashval2) | |
1656 | || !WPACKET_close(pkt) | |
1657 | || !WPACKET_start_sub_packet_u8(pkt) | |
1658 | || !WPACKET_reserve_bytes(pkt, SSL_COOKIE_LENGTH, &appcookie1)) { | |
1659 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_COOKIE, | |
1660 | ERR_R_INTERNAL_ERROR); | |
1661 | return EXT_RETURN_FAIL; | |
1662 | } | |
1663 | ||
1664 | /* Generate the application cookie */ | |
1665 | if (s->ctx->app_gen_cookie_cb(s, appcookie1, &appcookielen) == 0) { | |
1666 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_COOKIE, | |
1667 | SSL_R_COOKIE_GEN_CALLBACK_FAILURE); | |
1668 | return EXT_RETURN_FAIL; | |
1669 | } | |
1670 | ||
1671 | if (!WPACKET_allocate_bytes(pkt, appcookielen, &appcookie2) | |
1672 | || !ossl_assert(appcookie1 == appcookie2) | |
1673 | || !WPACKET_close(pkt) | |
1674 | || !WPACKET_get_total_written(pkt, &totcookielen) | |
1675 | || !WPACKET_reserve_bytes(pkt, SHA256_DIGEST_LENGTH, &hmac)) { | |
1676 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_COOKIE, | |
1677 | ERR_R_INTERNAL_ERROR); | |
1678 | return EXT_RETURN_FAIL; | |
1679 | } | |
1680 | hmaclen = SHA256_DIGEST_LENGTH; | |
1681 | ||
1682 | totcookielen -= startlen; | |
1683 | if (!ossl_assert(totcookielen <= MAX_COOKIE_SIZE - SHA256_DIGEST_LENGTH)) { | |
1684 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_COOKIE, | |
1685 | ERR_R_INTERNAL_ERROR); | |
1686 | return EXT_RETURN_FAIL; | |
1687 | } | |
1688 | ||
1689 | /* HMAC the cookie */ | |
1690 | hctx = EVP_MD_CTX_create(); | |
1691 | pkey = EVP_PKEY_new_mac_key(EVP_PKEY_HMAC, NULL, | |
1692 | s->session_ctx->ext.cookie_hmac_key, | |
1693 | sizeof(s->session_ctx->ext.cookie_hmac_key)); | |
1694 | if (hctx == NULL || pkey == NULL) { | |
1695 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_COOKIE, | |
1696 | ERR_R_MALLOC_FAILURE); | |
1697 | goto err; | |
1698 | } | |
1699 | ||
1700 | if (EVP_DigestSignInit(hctx, NULL, EVP_sha256(), NULL, pkey) <= 0 | |
1701 | || EVP_DigestSign(hctx, hmac, &hmaclen, cookie, | |
1702 | totcookielen) <= 0) { | |
1703 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_COOKIE, | |
1704 | ERR_R_INTERNAL_ERROR); | |
1705 | goto err; | |
1706 | } | |
1707 | ||
1708 | if (!ossl_assert(totcookielen + hmaclen <= MAX_COOKIE_SIZE)) { | |
1709 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_COOKIE, | |
1710 | ERR_R_INTERNAL_ERROR); | |
1711 | goto err; | |
1712 | } | |
1713 | ||
1714 | if (!WPACKET_allocate_bytes(pkt, hmaclen, &hmac2) | |
1715 | || !ossl_assert(hmac == hmac2) | |
1716 | || !ossl_assert(cookie == hmac - totcookielen) | |
1717 | || !WPACKET_close(pkt) | |
1718 | || !WPACKET_close(pkt)) { | |
1719 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_COOKIE, | |
1720 | ERR_R_INTERNAL_ERROR); | |
1721 | goto err; | |
1722 | } | |
1723 | ||
1724 | ret = EXT_RETURN_SENT; | |
1725 | ||
1726 | err: | |
1727 | EVP_MD_CTX_free(hctx); | |
1728 | EVP_PKEY_free(pkey); | |
1729 | return ret; | |
1730 | } | |
1731 | ||
b186a592 MC |
1732 | EXT_RETURN tls_construct_stoc_cryptopro_bug(SSL *s, WPACKET *pkt, |
1733 | unsigned int context, X509 *x, | |
f63a17d6 | 1734 | size_t chainidx) |
7da160b0 MC |
1735 | { |
1736 | const unsigned char cryptopro_ext[36] = { | |
1737 | 0xfd, 0xe8, /* 65000 */ | |
1738 | 0x00, 0x20, /* 32 bytes length */ | |
1739 | 0x30, 0x1e, 0x30, 0x08, 0x06, 0x06, 0x2a, 0x85, | |
1740 | 0x03, 0x02, 0x02, 0x09, 0x30, 0x08, 0x06, 0x06, | |
1741 | 0x2a, 0x85, 0x03, 0x02, 0x02, 0x16, 0x30, 0x08, | |
1742 | 0x06, 0x06, 0x2a, 0x85, 0x03, 0x02, 0x02, 0x17 | |
1743 | }; | |
1744 | ||
1745 | if (((s->s3->tmp.new_cipher->id & 0xFFFF) != 0x80 | |
1746 | && (s->s3->tmp.new_cipher->id & 0xFFFF) != 0x81) | |
1747 | || (SSL_get_options(s) & SSL_OP_CRYPTOPRO_TLSEXT_BUG) == 0) | |
b186a592 | 1748 | return EXT_RETURN_NOT_SENT; |
7da160b0 MC |
1749 | |
1750 | if (!WPACKET_memcpy(pkt, cryptopro_ext, sizeof(cryptopro_ext))) { | |
f63a17d6 MC |
1751 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1752 | SSL_F_TLS_CONSTRUCT_STOC_CRYPTOPRO_BUG, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1753 | return EXT_RETURN_FAIL; |
7da160b0 MC |
1754 | } |
1755 | ||
b186a592 | 1756 | return EXT_RETURN_SENT; |
7da160b0 | 1757 | } |
0247086d | 1758 | |
b186a592 MC |
1759 | EXT_RETURN tls_construct_stoc_early_data(SSL *s, WPACKET *pkt, |
1760 | unsigned int context, X509 *x, | |
f63a17d6 | 1761 | size_t chainidx) |
38df5a45 | 1762 | { |
fe874d27 | 1763 | if (context == SSL_EXT_TLS1_3_NEW_SESSION_TICKET) { |
6594189f | 1764 | if (s->max_early_data == 0) |
b186a592 | 1765 | return EXT_RETURN_NOT_SENT; |
6594189f MC |
1766 | |
1767 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) | |
1768 | || !WPACKET_start_sub_packet_u16(pkt) | |
1769 | || !WPACKET_put_bytes_u32(pkt, s->max_early_data) | |
1770 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
1771 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1772 | SSL_F_TLS_CONSTRUCT_STOC_EARLY_DATA, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1773 | return EXT_RETURN_FAIL; |
6594189f MC |
1774 | } |
1775 | ||
b186a592 | 1776 | return EXT_RETURN_SENT; |
6594189f MC |
1777 | } |
1778 | ||
38df5a45 | 1779 | if (s->ext.early_data != SSL_EARLY_DATA_ACCEPTED) |
b186a592 | 1780 | return EXT_RETURN_NOT_SENT; |
38df5a45 MC |
1781 | |
1782 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) | |
1783 | || !WPACKET_start_sub_packet_u16(pkt) | |
1784 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
1785 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_EARLY_DATA, |
1786 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1787 | return EXT_RETURN_FAIL; |
38df5a45 MC |
1788 | } |
1789 | ||
b186a592 | 1790 | return EXT_RETURN_SENT; |
38df5a45 MC |
1791 | } |
1792 | ||
b186a592 | 1793 | EXT_RETURN tls_construct_stoc_psk(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 1794 | X509 *x, size_t chainidx) |
0247086d MC |
1795 | { |
1796 | if (!s->hit) | |
b186a592 | 1797 | return EXT_RETURN_NOT_SENT; |
0247086d MC |
1798 | |
1799 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk) | |
1800 | || !WPACKET_start_sub_packet_u16(pkt) | |
1801 | || !WPACKET_put_bytes_u16(pkt, s->session->ext.tick_identity) | |
1802 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
1803 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1804 | SSL_F_TLS_CONSTRUCT_STOC_PSK, ERR_R_INTERNAL_ERROR); | |
b186a592 | 1805 | return EXT_RETURN_FAIL; |
0247086d MC |
1806 | } |
1807 | ||
b186a592 | 1808 | return EXT_RETURN_SENT; |
0247086d | 1809 | } |