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6dd083fd | 1 | /* |
a28d06f3 | 2 | * Copyright 2016-2021 The OpenSSL Project Authors. All Rights Reserved. |
6dd083fd | 3 | * |
2c18d164 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
6dd083fd MC |
5 | * this file except in compliance with the License. You can obtain a copy |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
8 | */ | |
9 | ||
ab83e314 | 10 | #include <openssl/ocsp.h> |
706457b7 | 11 | #include "../ssl_local.h" |
67dc995e | 12 | #include "internal/cryptlib.h" |
706457b7 | 13 | #include "statem_local.h" |
6dd083fd | 14 | |
b186a592 MC |
15 | EXT_RETURN tls_construct_ctos_renegotiate(SSL *s, WPACKET *pkt, |
16 | unsigned int context, X509 *x, | |
f63a17d6 | 17 | size_t chainidx) |
ab83e314 MC |
18 | { |
19 | /* Add RI if renegotiating */ | |
20 | if (!s->renegotiate) | |
b186a592 | 21 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
22 | |
23 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_renegotiate) | |
24 | || !WPACKET_start_sub_packet_u16(pkt) | |
555cbb32 TS |
25 | || !WPACKET_sub_memcpy_u8(pkt, s->s3.previous_client_finished, |
26 | s->s3.previous_client_finished_len) | |
ab83e314 | 27 | || !WPACKET_close(pkt)) { |
c48ffbcc | 28 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 29 | return EXT_RETURN_FAIL; |
ab83e314 MC |
30 | } |
31 | ||
b186a592 | 32 | return EXT_RETURN_SENT; |
ab83e314 MC |
33 | } |
34 | ||
b186a592 MC |
35 | EXT_RETURN tls_construct_ctos_server_name(SSL *s, WPACKET *pkt, |
36 | unsigned int context, X509 *x, | |
f63a17d6 | 37 | size_t chainidx) |
ab83e314 | 38 | { |
aff8c126 | 39 | if (s->ext.hostname == NULL) |
b186a592 | 40 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
41 | |
42 | /* Add TLS extension servername to the Client Hello message */ | |
43 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_server_name) | |
44 | /* Sub-packet for server_name extension */ | |
45 | || !WPACKET_start_sub_packet_u16(pkt) | |
46 | /* Sub-packet for servername list (always 1 hostname)*/ | |
47 | || !WPACKET_start_sub_packet_u16(pkt) | |
48 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_NAMETYPE_host_name) | |
aff8c126 RS |
49 | || !WPACKET_sub_memcpy_u16(pkt, s->ext.hostname, |
50 | strlen(s->ext.hostname)) | |
ab83e314 MC |
51 | || !WPACKET_close(pkt) |
52 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 53 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 54 | return EXT_RETURN_FAIL; |
ab83e314 MC |
55 | } |
56 | ||
b186a592 | 57 | return EXT_RETURN_SENT; |
ab83e314 MC |
58 | } |
59 | ||
cf72c757 F |
60 | /* Push a Max Fragment Len extension into ClientHello */ |
61 | EXT_RETURN tls_construct_ctos_maxfragmentlen(SSL *s, WPACKET *pkt, | |
62 | unsigned int context, X509 *x, | |
f63a17d6 | 63 | size_t chainidx) |
cf72c757 F |
64 | { |
65 | if (s->ext.max_fragment_len_mode == TLSEXT_max_fragment_length_DISABLED) | |
66 | return EXT_RETURN_NOT_SENT; | |
67 | ||
68 | /* Add Max Fragment Length extension if client enabled it. */ | |
69 | /*- | |
70 | * 4 bytes for this extension type and extension length | |
71 | * 1 byte for the Max Fragment Length code value. | |
72 | */ | |
73 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_max_fragment_length) | |
74 | /* Sub-packet for Max Fragment Length extension (1 byte) */ | |
75 | || !WPACKET_start_sub_packet_u16(pkt) | |
76 | || !WPACKET_put_bytes_u8(pkt, s->ext.max_fragment_len_mode) | |
77 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 78 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
cf72c757 F |
79 | return EXT_RETURN_FAIL; |
80 | } | |
81 | ||
82 | return EXT_RETURN_SENT; | |
83 | } | |
84 | ||
ab83e314 | 85 | #ifndef OPENSSL_NO_SRP |
b186a592 | 86 | EXT_RETURN tls_construct_ctos_srp(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 87 | X509 *x, size_t chainidx) |
ab83e314 MC |
88 | { |
89 | /* Add SRP username if there is one */ | |
90 | if (s->srp_ctx.login == NULL) | |
b186a592 | 91 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
92 | |
93 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_srp) | |
94 | /* Sub-packet for SRP extension */ | |
95 | || !WPACKET_start_sub_packet_u16(pkt) | |
96 | || !WPACKET_start_sub_packet_u8(pkt) | |
97 | /* login must not be zero...internal error if so */ | |
98 | || !WPACKET_set_flags(pkt, WPACKET_FLAGS_NON_ZERO_LENGTH) | |
99 | || !WPACKET_memcpy(pkt, s->srp_ctx.login, | |
100 | strlen(s->srp_ctx.login)) | |
101 | || !WPACKET_close(pkt) | |
102 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 103 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 104 | return EXT_RETURN_FAIL; |
ab83e314 MC |
105 | } |
106 | ||
b186a592 | 107 | return EXT_RETURN_SENT; |
ab83e314 MC |
108 | } |
109 | #endif | |
110 | ||
9d2d857f | 111 | static int use_ecc(SSL *s, int min_version, int max_version) |
ab83e314 | 112 | { |
589b6227 | 113 | int i, end, ret = 0; |
ab83e314 MC |
114 | unsigned long alg_k, alg_a; |
115 | STACK_OF(SSL_CIPHER) *cipher_stack = NULL; | |
dbc6268f MC |
116 | const uint16_t *pgroups = NULL; |
117 | size_t num_groups, j; | |
ab83e314 MC |
118 | |
119 | /* See if we support any ECC ciphersuites */ | |
120 | if (s->version == SSL3_VERSION) | |
121 | return 0; | |
122 | ||
589b6227 | 123 | cipher_stack = SSL_get1_supported_ciphers(s); |
1266eefd MC |
124 | end = sk_SSL_CIPHER_num(cipher_stack); |
125 | for (i = 0; i < end; i++) { | |
ab83e314 MC |
126 | const SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i); |
127 | ||
128 | alg_k = c->algorithm_mkey; | |
129 | alg_a = c->algorithm_auth; | |
130 | if ((alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) | |
1266eefd | 131 | || (alg_a & SSL_aECDSA) |
589b6227 MC |
132 | || c->min_tls >= TLS1_3_VERSION) { |
133 | ret = 1; | |
134 | break; | |
135 | } | |
ab83e314 | 136 | } |
589b6227 | 137 | sk_SSL_CIPHER_free(cipher_stack); |
dbc6268f MC |
138 | if (!ret) |
139 | return 0; | |
140 | ||
141 | /* Check we have at least one EC supported group */ | |
142 | tls1_get_supported_groups(s, &pgroups, &num_groups); | |
143 | for (j = 0; j < num_groups; j++) { | |
144 | uint16_t ctmp = pgroups[j]; | |
145 | ||
8b1db5d3 | 146 | if (tls_valid_group(s, ctmp, min_version, max_version, 1, NULL) |
dbc6268f MC |
147 | && tls_group_allowed(s, ctmp, SSL_SECOP_CURVE_SUPPORTED)) |
148 | return 1; | |
149 | } | |
150 | ||
151 | return 0; | |
ab83e314 MC |
152 | } |
153 | ||
b186a592 MC |
154 | EXT_RETURN tls_construct_ctos_ec_pt_formats(SSL *s, WPACKET *pkt, |
155 | unsigned int context, X509 *x, | |
f63a17d6 | 156 | size_t chainidx) |
ab83e314 MC |
157 | { |
158 | const unsigned char *pformats; | |
159 | size_t num_formats; | |
dbc6268f | 160 | int reason, min_version, max_version; |
ab83e314 | 161 | |
dbc6268f MC |
162 | reason = ssl_get_min_max_version(s, &min_version, &max_version, NULL); |
163 | if (reason != 0) { | |
c48ffbcc | 164 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, reason); |
dbc6268f MC |
165 | return EXT_RETURN_FAIL; |
166 | } | |
9d2d857f | 167 | if (!use_ecc(s, min_version, max_version)) |
b186a592 | 168 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
169 | |
170 | /* Add TLS extension ECPointFormats to the ClientHello message */ | |
ab83e314 MC |
171 | tls1_get_formatlist(s, &pformats, &num_formats); |
172 | ||
173 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_ec_point_formats) | |
174 | /* Sub-packet for formats extension */ | |
175 | || !WPACKET_start_sub_packet_u16(pkt) | |
176 | || !WPACKET_sub_memcpy_u8(pkt, pformats, num_formats) | |
177 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 178 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 179 | return EXT_RETURN_FAIL; |
ab83e314 MC |
180 | } |
181 | ||
b186a592 | 182 | return EXT_RETURN_SENT; |
ab83e314 MC |
183 | } |
184 | ||
b186a592 MC |
185 | EXT_RETURN tls_construct_ctos_supported_groups(SSL *s, WPACKET *pkt, |
186 | unsigned int context, X509 *x, | |
f63a17d6 | 187 | size_t chainidx) |
ab83e314 | 188 | { |
f48d826e | 189 | const uint16_t *pgroups = NULL; |
8b1db5d3 | 190 | size_t num_groups = 0, i, tls13added = 0, added = 0; |
9aaecbfc | 191 | int min_version, max_version, reason; |
ab83e314 | 192 | |
9aaecbfc | 193 | reason = ssl_get_min_max_version(s, &min_version, &max_version, NULL); |
194 | if (reason != 0) { | |
c48ffbcc | 195 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, reason); |
9aaecbfc | 196 | return EXT_RETURN_FAIL; |
197 | } | |
198 | ||
8b1db5d3 MC |
199 | /* |
200 | * We only support EC groups in TLSv1.2 or below, and in DTLS. Therefore | |
201 | * if we don't have EC support then we don't send this extension. | |
202 | */ | |
203 | if (!use_ecc(s, min_version, max_version) | |
204 | && (SSL_IS_DTLS(s) || max_version < TLS1_3_VERSION)) | |
dbc6268f | 205 | return EXT_RETURN_NOT_SENT; |
dbc6268f | 206 | |
ab83e314 MC |
207 | /* |
208 | * Add TLS extension supported_groups to the ClientHello message | |
209 | */ | |
f48d826e | 210 | tls1_get_supported_groups(s, &pgroups, &num_groups); |
ab83e314 MC |
211 | |
212 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_groups) | |
213 | /* Sub-packet for supported_groups extension */ | |
214 | || !WPACKET_start_sub_packet_u16(pkt) | |
9aaecbfc | 215 | || !WPACKET_start_sub_packet_u16(pkt) |
216 | || !WPACKET_set_flags(pkt, WPACKET_FLAGS_NON_ZERO_LENGTH)) { | |
c48ffbcc | 217 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 218 | return EXT_RETURN_FAIL; |
ab83e314 | 219 | } |
9aaecbfc | 220 | /* Copy group ID if supported */ |
f48d826e DSH |
221 | for (i = 0; i < num_groups; i++) { |
222 | uint16_t ctmp = pgroups[i]; | |
8b1db5d3 | 223 | int okfortls13; |
9e84a42d | 224 | |
8b1db5d3 | 225 | if (tls_valid_group(s, ctmp, min_version, max_version, 0, &okfortls13) |
dbc6268f | 226 | && tls_group_allowed(s, ctmp, SSL_SECOP_CURVE_SUPPORTED)) { |
0a10825a BE |
227 | #ifndef OPENSSL_NO_TLS1_3 |
228 | int ctmp13 = ssl_group_id_internal_to_tls13(ctmp); | |
229 | ||
230 | if (ctmp13 != 0 && ctmp13 != ctmp | |
231 | && max_version == TLS1_3_VERSION) { | |
232 | if (!WPACKET_put_bytes_u16(pkt, ctmp13)) { | |
233 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
234 | return EXT_RETURN_FAIL; | |
235 | } | |
236 | tls13added++; | |
237 | added++; | |
238 | if (min_version == TLS1_3_VERSION) | |
239 | continue; | |
240 | } | |
241 | #endif | |
9e84a42d | 242 | if (!WPACKET_put_bytes_u16(pkt, ctmp)) { |
c48ffbcc | 243 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
9aaecbfc | 244 | return EXT_RETURN_FAIL; |
245 | } | |
8b1db5d3 MC |
246 | if (okfortls13 && max_version == TLS1_3_VERSION) |
247 | tls13added++; | |
248 | added++; | |
ab83e314 MC |
249 | } |
250 | } | |
251 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
9afc6c54 | 252 | if (added == 0) |
8b1db5d3 MC |
253 | SSLfatal_data(s, SSL_AD_INTERNAL_ERROR, SSL_R_NO_SUITABLE_GROUPS, |
254 | "No groups enabled for max supported SSL/TLS version"); | |
255 | else | |
256 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
b186a592 | 257 | return EXT_RETURN_FAIL; |
9afc6c54 MC |
258 | } |
259 | ||
260 | if (tls13added == 0 && max_version == TLS1_3_VERSION) { | |
261 | SSLfatal_data(s, SSL_AD_INTERNAL_ERROR, SSL_R_NO_SUITABLE_GROUPS, | |
262 | "No groups enabled for max supported SSL/TLS version"); | |
263 | return EXT_RETURN_FAIL; | |
ab83e314 MC |
264 | } |
265 | ||
b186a592 | 266 | return EXT_RETURN_SENT; |
ab83e314 | 267 | } |
ab83e314 | 268 | |
b186a592 MC |
269 | EXT_RETURN tls_construct_ctos_session_ticket(SSL *s, WPACKET *pkt, |
270 | unsigned int context, X509 *x, | |
f63a17d6 | 271 | size_t chainidx) |
ab83e314 MC |
272 | { |
273 | size_t ticklen; | |
274 | ||
275 | if (!tls_use_ticket(s)) | |
b186a592 | 276 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
277 | |
278 | if (!s->new_session && s->session != NULL | |
08191294 MC |
279 | && s->session->ext.tick != NULL |
280 | && s->session->ssl_version != TLS1_3_VERSION) { | |
aff8c126 RS |
281 | ticklen = s->session->ext.ticklen; |
282 | } else if (s->session && s->ext.session_ticket != NULL | |
283 | && s->ext.session_ticket->data != NULL) { | |
284 | ticklen = s->ext.session_ticket->length; | |
285 | s->session->ext.tick = OPENSSL_malloc(ticklen); | |
286 | if (s->session->ext.tick == NULL) { | |
c48ffbcc | 287 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 288 | return EXT_RETURN_FAIL; |
ab83e314 | 289 | } |
aff8c126 RS |
290 | memcpy(s->session->ext.tick, |
291 | s->ext.session_ticket->data, ticklen); | |
292 | s->session->ext.ticklen = ticklen; | |
ab83e314 MC |
293 | } else { |
294 | ticklen = 0; | |
295 | } | |
296 | ||
aff8c126 RS |
297 | if (ticklen == 0 && s->ext.session_ticket != NULL && |
298 | s->ext.session_ticket->data == NULL) | |
b186a592 | 299 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
300 | |
301 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket) | |
aff8c126 | 302 | || !WPACKET_sub_memcpy_u16(pkt, s->session->ext.tick, ticklen)) { |
c48ffbcc | 303 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 304 | return EXT_RETURN_FAIL; |
ab83e314 MC |
305 | } |
306 | ||
b186a592 | 307 | return EXT_RETURN_SENT; |
ab83e314 MC |
308 | } |
309 | ||
b186a592 MC |
310 | EXT_RETURN tls_construct_ctos_sig_algs(SSL *s, WPACKET *pkt, |
311 | unsigned int context, X509 *x, | |
f63a17d6 | 312 | size_t chainidx) |
ab83e314 MC |
313 | { |
314 | size_t salglen; | |
98c792d1 | 315 | const uint16_t *salg; |
ab83e314 MC |
316 | |
317 | if (!SSL_CLIENT_USE_SIGALGS(s)) | |
b186a592 | 318 | return EXT_RETURN_NOT_SENT; |
ab83e314 | 319 | |
a9669ddc | 320 | salglen = tls12_get_psigalgs(s, 1, &salg); |
ab83e314 MC |
321 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signature_algorithms) |
322 | /* Sub-packet for sig-algs extension */ | |
323 | || !WPACKET_start_sub_packet_u16(pkt) | |
324 | /* Sub-packet for the actual list */ | |
325 | || !WPACKET_start_sub_packet_u16(pkt) | |
326 | || !tls12_copy_sigalgs(s, pkt, salg, salglen) | |
327 | || !WPACKET_close(pkt) | |
328 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 329 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 330 | return EXT_RETURN_FAIL; |
ab83e314 MC |
331 | } |
332 | ||
b186a592 | 333 | return EXT_RETURN_SENT; |
ab83e314 MC |
334 | } |
335 | ||
336 | #ifndef OPENSSL_NO_OCSP | |
b186a592 MC |
337 | EXT_RETURN tls_construct_ctos_status_request(SSL *s, WPACKET *pkt, |
338 | unsigned int context, X509 *x, | |
f63a17d6 | 339 | size_t chainidx) |
ab83e314 MC |
340 | { |
341 | int i; | |
342 | ||
e96e0f8e MC |
343 | /* This extension isn't defined for client Certificates */ |
344 | if (x != NULL) | |
b186a592 | 345 | return EXT_RETURN_NOT_SENT; |
e96e0f8e | 346 | |
aff8c126 | 347 | if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) |
b186a592 | 348 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
349 | |
350 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request) | |
351 | /* Sub-packet for status request extension */ | |
352 | || !WPACKET_start_sub_packet_u16(pkt) | |
353 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_STATUSTYPE_ocsp) | |
354 | /* Sub-packet for the ids */ | |
355 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
c48ffbcc | 356 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 357 | return EXT_RETURN_FAIL; |
ab83e314 | 358 | } |
aff8c126 | 359 | for (i = 0; i < sk_OCSP_RESPID_num(s->ext.ocsp.ids); i++) { |
ab83e314 | 360 | unsigned char *idbytes; |
aff8c126 | 361 | OCSP_RESPID *id = sk_OCSP_RESPID_value(s->ext.ocsp.ids, i); |
1266eefd | 362 | int idlen = i2d_OCSP_RESPID(id, NULL); |
ab83e314 | 363 | |
ab83e314 MC |
364 | if (idlen <= 0 |
365 | /* Sub-packet for an individual id */ | |
366 | || !WPACKET_sub_allocate_bytes_u16(pkt, idlen, &idbytes) | |
367 | || i2d_OCSP_RESPID(id, &idbytes) != idlen) { | |
c48ffbcc | 368 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 369 | return EXT_RETURN_FAIL; |
ab83e314 MC |
370 | } |
371 | } | |
372 | if (!WPACKET_close(pkt) | |
373 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
c48ffbcc | 374 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 375 | return EXT_RETURN_FAIL; |
ab83e314 | 376 | } |
aff8c126 | 377 | if (s->ext.ocsp.exts) { |
ab83e314 | 378 | unsigned char *extbytes; |
aff8c126 | 379 | int extlen = i2d_X509_EXTENSIONS(s->ext.ocsp.exts, NULL); |
ab83e314 MC |
380 | |
381 | if (extlen < 0) { | |
c48ffbcc | 382 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 383 | return EXT_RETURN_FAIL; |
ab83e314 MC |
384 | } |
385 | if (!WPACKET_allocate_bytes(pkt, extlen, &extbytes) | |
aff8c126 | 386 | || i2d_X509_EXTENSIONS(s->ext.ocsp.exts, &extbytes) |
ab83e314 | 387 | != extlen) { |
c48ffbcc | 388 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 389 | return EXT_RETURN_FAIL; |
ab83e314 MC |
390 | } |
391 | } | |
392 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
c48ffbcc | 393 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 394 | return EXT_RETURN_FAIL; |
ab83e314 MC |
395 | } |
396 | ||
b186a592 | 397 | return EXT_RETURN_SENT; |
ab83e314 MC |
398 | } |
399 | #endif | |
400 | ||
401 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
b186a592 | 402 | EXT_RETURN tls_construct_ctos_npn(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 403 | X509 *x, size_t chainidx) |
ab83e314 | 404 | { |
c7f47786 | 405 | if (s->ctx->ext.npn_select_cb == NULL || !SSL_IS_FIRST_HANDSHAKE(s)) |
b186a592 | 406 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
407 | |
408 | /* | |
409 | * The client advertises an empty extension to indicate its support | |
410 | * for Next Protocol Negotiation | |
411 | */ | |
412 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_next_proto_neg) | |
413 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
c48ffbcc | 414 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 415 | return EXT_RETURN_FAIL; |
ab83e314 MC |
416 | } |
417 | ||
b186a592 | 418 | return EXT_RETURN_SENT; |
ab83e314 MC |
419 | } |
420 | #endif | |
421 | ||
b186a592 | 422 | EXT_RETURN tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 423 | X509 *x, size_t chainidx) |
ab83e314 | 424 | { |
555cbb32 | 425 | s->s3.alpn_sent = 0; |
ab83e314 | 426 | |
c7f47786 | 427 | if (s->ext.alpn == NULL || !SSL_IS_FIRST_HANDSHAKE(s)) |
b186a592 | 428 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
429 | |
430 | if (!WPACKET_put_bytes_u16(pkt, | |
431 | TLSEXT_TYPE_application_layer_protocol_negotiation) | |
432 | /* Sub-packet ALPN extension */ | |
433 | || !WPACKET_start_sub_packet_u16(pkt) | |
aff8c126 | 434 | || !WPACKET_sub_memcpy_u16(pkt, s->ext.alpn, s->ext.alpn_len) |
ab83e314 | 435 | || !WPACKET_close(pkt)) { |
c48ffbcc | 436 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 437 | return EXT_RETURN_FAIL; |
ab83e314 | 438 | } |
555cbb32 | 439 | s->s3.alpn_sent = 1; |
ab83e314 | 440 | |
b186a592 | 441 | return EXT_RETURN_SENT; |
ab83e314 MC |
442 | } |
443 | ||
444 | ||
445 | #ifndef OPENSSL_NO_SRTP | |
b186a592 MC |
446 | EXT_RETURN tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt, |
447 | unsigned int context, X509 *x, | |
f63a17d6 | 448 | size_t chainidx) |
ab83e314 MC |
449 | { |
450 | STACK_OF(SRTP_PROTECTION_PROFILE) *clnt = SSL_get_srtp_profiles(s); | |
1266eefd | 451 | int i, end; |
ab83e314 MC |
452 | |
453 | if (clnt == NULL) | |
b186a592 | 454 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
455 | |
456 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp) | |
457 | /* Sub-packet for SRTP extension */ | |
458 | || !WPACKET_start_sub_packet_u16(pkt) | |
459 | /* Sub-packet for the protection profile list */ | |
460 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
c48ffbcc | 461 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 462 | return EXT_RETURN_FAIL; |
ab83e314 | 463 | } |
1266eefd MC |
464 | |
465 | end = sk_SRTP_PROTECTION_PROFILE_num(clnt); | |
466 | for (i = 0; i < end; i++) { | |
467 | const SRTP_PROTECTION_PROFILE *prof = | |
468 | sk_SRTP_PROTECTION_PROFILE_value(clnt, i); | |
469 | ||
ab83e314 | 470 | if (prof == NULL || !WPACKET_put_bytes_u16(pkt, prof->id)) { |
c48ffbcc | 471 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 472 | return EXT_RETURN_FAIL; |
ab83e314 MC |
473 | } |
474 | } | |
475 | if (!WPACKET_close(pkt) | |
476 | /* Add an empty use_mki value */ | |
477 | || !WPACKET_put_bytes_u8(pkt, 0) | |
478 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 479 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 480 | return EXT_RETURN_FAIL; |
ab83e314 MC |
481 | } |
482 | ||
b186a592 | 483 | return EXT_RETURN_SENT; |
ab83e314 MC |
484 | } |
485 | #endif | |
486 | ||
b186a592 | 487 | EXT_RETURN tls_construct_ctos_etm(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 488 | X509 *x, size_t chainidx) |
ab83e314 MC |
489 | { |
490 | if (s->options & SSL_OP_NO_ENCRYPT_THEN_MAC) | |
b186a592 | 491 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
492 | |
493 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac) | |
494 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
c48ffbcc | 495 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 496 | return EXT_RETURN_FAIL; |
ab83e314 MC |
497 | } |
498 | ||
b186a592 | 499 | return EXT_RETURN_SENT; |
ab83e314 MC |
500 | } |
501 | ||
502 | #ifndef OPENSSL_NO_CT | |
b186a592 | 503 | EXT_RETURN tls_construct_ctos_sct(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 504 | X509 *x, size_t chainidx) |
ab83e314 MC |
505 | { |
506 | if (s->ct_validation_callback == NULL) | |
b186a592 | 507 | return EXT_RETURN_NOT_SENT; |
ab83e314 | 508 | |
e96e0f8e MC |
509 | /* Not defined for client Certificates */ |
510 | if (x != NULL) | |
b186a592 | 511 | return EXT_RETURN_NOT_SENT; |
e96e0f8e | 512 | |
ab83e314 MC |
513 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signed_certificate_timestamp) |
514 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
c48ffbcc | 515 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 516 | return EXT_RETURN_FAIL; |
ab83e314 MC |
517 | } |
518 | ||
b186a592 | 519 | return EXT_RETURN_SENT; |
ab83e314 MC |
520 | } |
521 | #endif | |
522 | ||
b186a592 | 523 | EXT_RETURN tls_construct_ctos_ems(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 524 | X509 *x, size_t chainidx) |
ab83e314 | 525 | { |
088dfa13 TS |
526 | if (s->options & SSL_OP_NO_EXTENDED_MASTER_SECRET) |
527 | return EXT_RETURN_NOT_SENT; | |
528 | ||
ab83e314 MC |
529 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret) |
530 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
c48ffbcc | 531 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 532 | return EXT_RETURN_FAIL; |
ab83e314 MC |
533 | } |
534 | ||
b186a592 | 535 | return EXT_RETURN_SENT; |
ab83e314 MC |
536 | } |
537 | ||
b186a592 MC |
538 | EXT_RETURN tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt, |
539 | unsigned int context, X509 *x, | |
f63a17d6 | 540 | size_t chainidx) |
ab83e314 MC |
541 | { |
542 | int currv, min_version, max_version, reason; | |
543 | ||
b5b993b2 | 544 | reason = ssl_get_min_max_version(s, &min_version, &max_version, NULL); |
88050dd1 | 545 | if (reason != 0) { |
c48ffbcc | 546 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, reason); |
88050dd1 MC |
547 | return EXT_RETURN_FAIL; |
548 | } | |
549 | ||
550 | /* | |
551 | * Don't include this if we can't negotiate TLSv1.3. We can do a straight | |
552 | * comparison here because we will never be called in DTLS. | |
553 | */ | |
554 | if (max_version < TLS1_3_VERSION) | |
555 | return EXT_RETURN_NOT_SENT; | |
556 | ||
ab83e314 MC |
557 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_versions) |
558 | || !WPACKET_start_sub_packet_u16(pkt) | |
559 | || !WPACKET_start_sub_packet_u8(pkt)) { | |
c48ffbcc | 560 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 561 | return EXT_RETURN_FAIL; |
ab83e314 MC |
562 | } |
563 | ||
ab83e314 | 564 | for (currv = max_version; currv >= min_version; currv--) { |
35e742ec | 565 | if (!WPACKET_put_bytes_u16(pkt, currv)) { |
c48ffbcc | 566 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 567 | return EXT_RETURN_FAIL; |
ab83e314 MC |
568 | } |
569 | } | |
570 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
c48ffbcc | 571 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 572 | return EXT_RETURN_FAIL; |
ab83e314 MC |
573 | } |
574 | ||
b186a592 | 575 | return EXT_RETURN_SENT; |
ab83e314 MC |
576 | } |
577 | ||
b2f7e8c0 | 578 | /* |
e3c0d76b | 579 | * Construct a psk_kex_modes extension. |
b2f7e8c0 | 580 | */ |
b186a592 MC |
581 | EXT_RETURN tls_construct_ctos_psk_kex_modes(SSL *s, WPACKET *pkt, |
582 | unsigned int context, X509 *x, | |
f63a17d6 | 583 | size_t chainidx) |
b2f7e8c0 MC |
584 | { |
585 | #ifndef OPENSSL_NO_TLS1_3 | |
e3c0d76b MC |
586 | int nodhe = s->options & SSL_OP_ALLOW_NO_DHE_KEX; |
587 | ||
b2f7e8c0 MC |
588 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk_kex_modes) |
589 | || !WPACKET_start_sub_packet_u16(pkt) | |
590 | || !WPACKET_start_sub_packet_u8(pkt) | |
591 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE_DHE) | |
e3c0d76b | 592 | || (nodhe && !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE)) |
b2f7e8c0 MC |
593 | || !WPACKET_close(pkt) |
594 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 595 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 596 | return EXT_RETURN_FAIL; |
b2f7e8c0 | 597 | } |
b3ad72ce | 598 | |
e3c0d76b MC |
599 | s->ext.psk_kex_mode = TLSEXT_KEX_MODE_FLAG_KE_DHE; |
600 | if (nodhe) | |
601 | s->ext.psk_kex_mode |= TLSEXT_KEX_MODE_FLAG_KE; | |
b2f7e8c0 MC |
602 | #endif |
603 | ||
b186a592 | 604 | return EXT_RETURN_SENT; |
b2f7e8c0 MC |
605 | } |
606 | ||
3847d426 MC |
607 | #ifndef OPENSSL_NO_TLS1_3 |
608 | static int add_key_share(SSL *s, WPACKET *pkt, unsigned int curve_id) | |
609 | { | |
7b1ec1cf MC |
610 | unsigned char *encoded_point = NULL; |
611 | EVP_PKEY *key_share_key = NULL; | |
3847d426 MC |
612 | size_t encodedlen; |
613 | ||
555cbb32 | 614 | if (s->s3.tmp.pkey != NULL) { |
fc7129dc | 615 | if (!ossl_assert(s->hello_retry_request == SSL_HRR_PENDING)) { |
c48ffbcc | 616 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
d8028b20 | 617 | return 0; |
7b1ec1cf MC |
618 | } |
619 | /* | |
620 | * Could happen if we got an HRR that wasn't requesting a new key_share | |
621 | */ | |
555cbb32 | 622 | key_share_key = s->s3.tmp.pkey; |
7b1ec1cf | 623 | } else { |
f63a17d6 | 624 | key_share_key = ssl_generate_pkey_group(s, curve_id); |
7b1ec1cf | 625 | if (key_share_key == NULL) { |
f63a17d6 | 626 | /* SSLfatal() already called */ |
d8028b20 | 627 | return 0; |
7b1ec1cf | 628 | } |
3847d426 MC |
629 | } |
630 | ||
631 | /* Encode the public key. */ | |
5ac8fb58 MC |
632 | encodedlen = EVP_PKEY_get1_encoded_public_key(key_share_key, |
633 | &encoded_point); | |
3847d426 | 634 | if (encodedlen == 0) { |
c48ffbcc | 635 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EC_LIB); |
7b1ec1cf | 636 | goto err; |
3847d426 MC |
637 | } |
638 | ||
639 | /* Create KeyShareEntry */ | |
0a10825a | 640 | if (!WPACKET_put_bytes_u16(pkt, ssl_group_id_internal_to_tls13(curve_id)) |
2248dbeb | 641 | || !WPACKET_sub_memcpy_u16(pkt, encoded_point, encodedlen)) { |
c48ffbcc | 642 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
7b1ec1cf | 643 | goto err; |
3847d426 MC |
644 | } |
645 | ||
646 | /* | |
407820c0 | 647 | * When changing to send more than one key_share we're |
3847d426 MC |
648 | * going to need to be able to save more than one EVP_PKEY. For now |
649 | * we reuse the existing tmp.pkey | |
650 | */ | |
555cbb32 TS |
651 | s->s3.tmp.pkey = key_share_key; |
652 | s->s3.group_id = curve_id; | |
2248dbeb | 653 | OPENSSL_free(encoded_point); |
3847d426 | 654 | |
d8028b20 | 655 | return 1; |
7b1ec1cf | 656 | err: |
555cbb32 | 657 | if (s->s3.tmp.pkey == NULL) |
7b1ec1cf MC |
658 | EVP_PKEY_free(key_share_key); |
659 | OPENSSL_free(encoded_point); | |
d8028b20 | 660 | return 0; |
3847d426 MC |
661 | } |
662 | #endif | |
663 | ||
b186a592 MC |
664 | EXT_RETURN tls_construct_ctos_key_share(SSL *s, WPACKET *pkt, |
665 | unsigned int context, X509 *x, | |
f63a17d6 | 666 | size_t chainidx) |
ab83e314 | 667 | { |
3cf96e88 | 668 | #ifndef OPENSSL_NO_TLS1_3 |
f48d826e DSH |
669 | size_t i, num_groups = 0; |
670 | const uint16_t *pgroups = NULL; | |
9e84a42d | 671 | uint16_t curve_id = 0; |
ab83e314 MC |
672 | |
673 | /* key_share extension */ | |
674 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
675 | /* Extension data sub-packet */ | |
676 | || !WPACKET_start_sub_packet_u16(pkt) | |
677 | /* KeyShare list sub-packet */ | |
678 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
c48ffbcc | 679 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 680 | return EXT_RETURN_FAIL; |
ab83e314 MC |
681 | } |
682 | ||
f48d826e | 683 | tls1_get_supported_groups(s, &pgroups, &num_groups); |
ab83e314 MC |
684 | |
685 | /* | |
407820c0 P |
686 | * Make the number of key_shares sent configurable. For |
687 | * now, we just send one | |
ab83e314 | 688 | */ |
555cbb32 TS |
689 | if (s->s3.group_id != 0) { |
690 | curve_id = s->s3.group_id; | |
3847d426 | 691 | } else { |
f48d826e | 692 | for (i = 0; i < num_groups; i++) { |
0a10825a BE |
693 | if (ssl_group_id_internal_to_tls13(pgroups[i]) == 0) |
694 | continue; | |
ab83e314 | 695 | |
dbc6268f | 696 | if (!tls_group_allowed(s, pgroups[i], SSL_SECOP_CURVE_SUPPORTED)) |
3847d426 | 697 | continue; |
ab83e314 | 698 | |
f48d826e | 699 | curve_id = pgroups[i]; |
3847d426 | 700 | break; |
ab83e314 | 701 | } |
3847d426 | 702 | } |
ab83e314 | 703 | |
3847d426 | 704 | if (curve_id == 0) { |
c48ffbcc | 705 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_NO_SUITABLE_KEY_SHARE); |
b186a592 | 706 | return EXT_RETURN_FAIL; |
ab83e314 MC |
707 | } |
708 | ||
f63a17d6 MC |
709 | if (!add_key_share(s, pkt, curve_id)) { |
710 | /* SSLfatal() already called */ | |
b186a592 | 711 | return EXT_RETURN_FAIL; |
f63a17d6 | 712 | } |
3847d426 | 713 | |
ab83e314 | 714 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { |
c48ffbcc | 715 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 716 | return EXT_RETURN_FAIL; |
ab83e314 | 717 | } |
b186a592 | 718 | return EXT_RETURN_SENT; |
aa2ed504 TS |
719 | #else |
720 | return EXT_RETURN_NOT_SENT; | |
721 | #endif | |
ab83e314 MC |
722 | } |
723 | ||
b186a592 | 724 | EXT_RETURN tls_construct_ctos_cookie(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 725 | X509 *x, size_t chainidx) |
cfef5027 | 726 | { |
b186a592 | 727 | EXT_RETURN ret = EXT_RETURN_FAIL; |
cfef5027 MC |
728 | |
729 | /* Should only be set if we've had an HRR */ | |
730 | if (s->ext.tls13_cookie_len == 0) | |
b186a592 | 731 | return EXT_RETURN_NOT_SENT; |
cfef5027 MC |
732 | |
733 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_cookie) | |
734 | /* Extension data sub-packet */ | |
735 | || !WPACKET_start_sub_packet_u16(pkt) | |
736 | || !WPACKET_sub_memcpy_u16(pkt, s->ext.tls13_cookie, | |
737 | s->ext.tls13_cookie_len) | |
738 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 739 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
cfef5027 MC |
740 | goto end; |
741 | } | |
742 | ||
b186a592 | 743 | ret = EXT_RETURN_SENT; |
cfef5027 MC |
744 | end: |
745 | OPENSSL_free(s->ext.tls13_cookie); | |
febb0afa | 746 | s->ext.tls13_cookie = NULL; |
cfef5027 MC |
747 | s->ext.tls13_cookie_len = 0; |
748 | ||
749 | return ret; | |
750 | } | |
751 | ||
b186a592 MC |
752 | EXT_RETURN tls_construct_ctos_early_data(SSL *s, WPACKET *pkt, |
753 | unsigned int context, X509 *x, | |
f63a17d6 | 754 | size_t chainidx) |
38df5a45 | 755 | { |
696de86f PW |
756 | #ifndef OPENSSL_NO_PSK |
757 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
758 | #endif /* OPENSSL_NO_PSK */ | |
ccb76685 | 759 | const unsigned char *id = NULL; |
fff202e5 | 760 | size_t idlen = 0; |
add8d0e9 | 761 | SSL_SESSION *psksess = NULL; |
ffc5bbaa | 762 | SSL_SESSION *edsess = NULL; |
add8d0e9 MC |
763 | const EVP_MD *handmd = NULL; |
764 | ||
fc7129dc | 765 | if (s->hello_retry_request == SSL_HRR_PENDING) |
add8d0e9 MC |
766 | handmd = ssl_handshake_md(s); |
767 | ||
768 | if (s->psk_use_session_cb != NULL | |
ffc5bbaa MC |
769 | && (!s->psk_use_session_cb(s, handmd, &id, &idlen, &psksess) |
770 | || (psksess != NULL | |
771 | && psksess->ssl_version != TLS1_3_VERSION))) { | |
772 | SSL_SESSION_free(psksess); | |
c48ffbcc | 773 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_PSK); |
add8d0e9 MC |
774 | return EXT_RETURN_FAIL; |
775 | } | |
776 | ||
c2b290c3 | 777 | #ifndef OPENSSL_NO_PSK |
f3d40db1 MC |
778 | if (psksess == NULL && s->psk_client_callback != NULL) { |
779 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
780 | size_t psklen = 0; | |
781 | ||
782 | memset(identity, 0, sizeof(identity)); | |
783 | psklen = s->psk_client_callback(s, NULL, identity, sizeof(identity) - 1, | |
784 | psk, sizeof(psk)); | |
785 | ||
786 | if (psklen > PSK_MAX_PSK_LEN) { | |
c48ffbcc | 787 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
788 | return EXT_RETURN_FAIL; |
789 | } else if (psklen > 0) { | |
790 | const unsigned char tls13_aes128gcmsha256_id[] = { 0x13, 0x01 }; | |
791 | const SSL_CIPHER *cipher; | |
792 | ||
793 | idlen = strlen(identity); | |
794 | if (idlen > PSK_MAX_IDENTITY_LEN) { | |
c48ffbcc | 795 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
796 | return EXT_RETURN_FAIL; |
797 | } | |
798 | id = (unsigned char *)identity; | |
799 | ||
800 | /* | |
801 | * We found a PSK using an old style callback. We don't know | |
802 | * the digest so we default to SHA256 as per the TLSv1.3 spec | |
803 | */ | |
804 | cipher = SSL_CIPHER_find(s, tls13_aes128gcmsha256_id); | |
805 | if (cipher == NULL) { | |
c48ffbcc | 806 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
807 | return EXT_RETURN_FAIL; |
808 | } | |
809 | ||
810 | psksess = SSL_SESSION_new(); | |
811 | if (psksess == NULL | |
812 | || !SSL_SESSION_set1_master_key(psksess, psk, psklen) | |
813 | || !SSL_SESSION_set_cipher(psksess, cipher) | |
814 | || !SSL_SESSION_set_protocol_version(psksess, TLS1_3_VERSION)) { | |
c48ffbcc | 815 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
816 | OPENSSL_cleanse(psk, psklen); |
817 | return EXT_RETURN_FAIL; | |
818 | } | |
819 | OPENSSL_cleanse(psk, psklen); | |
820 | } | |
821 | } | |
c2b290c3 | 822 | #endif /* OPENSSL_NO_PSK */ |
f3d40db1 | 823 | |
add8d0e9 MC |
824 | SSL_SESSION_free(s->psksession); |
825 | s->psksession = psksess; | |
826 | if (psksess != NULL) { | |
827 | OPENSSL_free(s->psksession_id); | |
828 | s->psksession_id = OPENSSL_memdup(id, idlen); | |
829 | if (s->psksession_id == NULL) { | |
39a14059 | 830 | s->psksession_id_len = 0; |
c48ffbcc | 831 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
add8d0e9 MC |
832 | return EXT_RETURN_FAIL; |
833 | } | |
834 | s->psksession_id_len = idlen; | |
835 | } | |
836 | ||
38df5a45 | 837 | if (s->early_data_state != SSL_EARLY_DATA_CONNECTING |
add8d0e9 MC |
838 | || (s->session->ext.max_early_data == 0 |
839 | && (psksess == NULL || psksess->ext.max_early_data == 0))) { | |
38df5a45 | 840 | s->max_early_data = 0; |
b186a592 | 841 | return EXT_RETURN_NOT_SENT; |
38df5a45 | 842 | } |
ffc5bbaa MC |
843 | edsess = s->session->ext.max_early_data != 0 ? s->session : psksess; |
844 | s->max_early_data = edsess->ext.max_early_data; | |
845 | ||
bfab12bb MC |
846 | if (edsess->ext.hostname != NULL) { |
847 | if (s->ext.hostname == NULL | |
848 | || (s->ext.hostname != NULL | |
849 | && strcmp(s->ext.hostname, edsess->ext.hostname) != 0)) { | |
f63a17d6 | 850 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
f63a17d6 | 851 | SSL_R_INCONSISTENT_EARLY_DATA_SNI); |
bfab12bb MC |
852 | return EXT_RETURN_FAIL; |
853 | } | |
ffc5bbaa MC |
854 | } |
855 | ||
856 | if ((s->ext.alpn == NULL && edsess->ext.alpn_selected != NULL)) { | |
c48ffbcc | 857 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_INCONSISTENT_EARLY_DATA_ALPN); |
ffc5bbaa MC |
858 | return EXT_RETURN_FAIL; |
859 | } | |
860 | ||
861 | /* | |
862 | * Verify that we are offering an ALPN protocol consistent with the early | |
863 | * data. | |
864 | */ | |
865 | if (edsess->ext.alpn_selected != NULL) { | |
866 | PACKET prots, alpnpkt; | |
867 | int found = 0; | |
868 | ||
869 | if (!PACKET_buf_init(&prots, s->ext.alpn, s->ext.alpn_len)) { | |
c48ffbcc | 870 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
ffc5bbaa MC |
871 | return EXT_RETURN_FAIL; |
872 | } | |
873 | while (PACKET_get_length_prefixed_1(&prots, &alpnpkt)) { | |
874 | if (PACKET_equal(&alpnpkt, edsess->ext.alpn_selected, | |
875 | edsess->ext.alpn_selected_len)) { | |
876 | found = 1; | |
877 | break; | |
878 | } | |
879 | } | |
880 | if (!found) { | |
f63a17d6 | 881 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
f63a17d6 | 882 | SSL_R_INCONSISTENT_EARLY_DATA_ALPN); |
ffc5bbaa MC |
883 | return EXT_RETURN_FAIL; |
884 | } | |
885 | } | |
38df5a45 MC |
886 | |
887 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) | |
888 | || !WPACKET_start_sub_packet_u16(pkt) | |
889 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 890 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 891 | return EXT_RETURN_FAIL; |
38df5a45 MC |
892 | } |
893 | ||
894 | /* | |
895 | * We set this to rejected here. Later, if the server acknowledges the | |
896 | * extension, we set it to accepted. | |
897 | */ | |
898 | s->ext.early_data = SSL_EARLY_DATA_REJECTED; | |
4be3a7c7 | 899 | s->ext.early_data_ok = 1; |
38df5a45 | 900 | |
b186a592 | 901 | return EXT_RETURN_SENT; |
38df5a45 MC |
902 | } |
903 | ||
1266eefd MC |
904 | #define F5_WORKAROUND_MIN_MSG_LEN 0xff |
905 | #define F5_WORKAROUND_MAX_MSG_LEN 0x200 | |
906 | ||
d702ad12 MC |
907 | /* |
908 | * PSK pre binder overhead = | |
909 | * 2 bytes for TLSEXT_TYPE_psk | |
910 | * 2 bytes for extension length | |
911 | * 2 bytes for identities list length | |
912 | * 2 bytes for identity length | |
913 | * 4 bytes for obfuscated_ticket_age | |
914 | * 2 bytes for binder list length | |
915 | * 1 byte for binder length | |
916 | * The above excludes the number of bytes for the identity itself and the | |
917 | * subsequent binder bytes | |
918 | */ | |
919 | #define PSK_PRE_BINDER_OVERHEAD (2 + 2 + 2 + 2 + 4 + 2 + 1) | |
920 | ||
b186a592 MC |
921 | EXT_RETURN tls_construct_ctos_padding(SSL *s, WPACKET *pkt, |
922 | unsigned int context, X509 *x, | |
f63a17d6 | 923 | size_t chainidx) |
ab83e314 MC |
924 | { |
925 | unsigned char *padbytes; | |
926 | size_t hlen; | |
927 | ||
928 | if ((s->options & SSL_OP_TLSEXT_PADDING) == 0) | |
b186a592 | 929 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
930 | |
931 | /* | |
d702ad12 MC |
932 | * Add padding to workaround bugs in F5 terminators. See RFC7685. |
933 | * This code calculates the length of all extensions added so far but | |
934 | * excludes the PSK extension (because that MUST be written last). Therefore | |
935 | * this extension MUST always appear second to last. | |
ab83e314 MC |
936 | */ |
937 | if (!WPACKET_get_total_written(pkt, &hlen)) { | |
c48ffbcc | 938 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 939 | return EXT_RETURN_FAIL; |
ab83e314 MC |
940 | } |
941 | ||
d702ad12 MC |
942 | /* |
943 | * If we're going to send a PSK then that will be written out after this | |
944 | * extension, so we need to calculate how long it is going to be. | |
945 | */ | |
946 | if (s->session->ssl_version == TLS1_3_VERSION | |
947 | && s->session->ext.ticklen != 0 | |
948 | && s->session->cipher != NULL) { | |
c8f6c28a | 949 | const EVP_MD *md = ssl_md(s->ctx, s->session->cipher->algorithm2); |
d702ad12 MC |
950 | |
951 | if (md != NULL) { | |
952 | /* | |
953 | * Add the fixed PSK overhead, the identity length and the binder | |
954 | * length. | |
955 | */ | |
956 | hlen += PSK_PRE_BINDER_OVERHEAD + s->session->ext.ticklen | |
ed576acd | 957 | + EVP_MD_get_size(md); |
d702ad12 MC |
958 | } |
959 | } | |
960 | ||
1266eefd | 961 | if (hlen > F5_WORKAROUND_MIN_MSG_LEN && hlen < F5_WORKAROUND_MAX_MSG_LEN) { |
1ee4b98e | 962 | /* Calculate the amount of padding we need to add */ |
1266eefd MC |
963 | hlen = F5_WORKAROUND_MAX_MSG_LEN - hlen; |
964 | ||
965 | /* | |
966 | * Take off the size of extension header itself (2 bytes for type and | |
10ed1b72 TS |
967 | * 2 bytes for length bytes), but ensure that the extension is at least |
968 | * 1 byte long so as not to have an empty extension last (WebSphere 7.x, | |
969 | * 8.x are intolerant of that condition) | |
1266eefd | 970 | */ |
3d85c7f4 | 971 | if (hlen > 4) |
ab83e314 MC |
972 | hlen -= 4; |
973 | else | |
10ed1b72 | 974 | hlen = 1; |
ab83e314 MC |
975 | |
976 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_padding) | |
977 | || !WPACKET_sub_allocate_bytes_u16(pkt, hlen, &padbytes)) { | |
c48ffbcc | 978 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
eb5fd03b | 979 | return EXT_RETURN_FAIL; |
ab83e314 MC |
980 | } |
981 | memset(padbytes, 0, hlen); | |
982 | } | |
983 | ||
b186a592 | 984 | return EXT_RETURN_SENT; |
ab83e314 MC |
985 | } |
986 | ||
ec15acb6 MC |
987 | /* |
988 | * Construct the pre_shared_key extension | |
989 | */ | |
b186a592 | 990 | EXT_RETURN tls_construct_ctos_psk(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 991 | X509 *x, size_t chainidx) |
ec15acb6 MC |
992 | { |
993 | #ifndef OPENSSL_NO_TLS1_3 | |
15b1688a | 994 | uint32_t now, agesec, agems = 0; |
add8d0e9 | 995 | size_t reshashsize = 0, pskhashsize = 0, binderoffset, msglen; |
9368f865 | 996 | unsigned char *resbinder = NULL, *pskbinder = NULL, *msgstart = NULL; |
15b1688a | 997 | const EVP_MD *handmd = NULL, *mdres = NULL, *mdpsk = NULL; |
9368f865 | 998 | int dores = 0; |
ec15acb6 | 999 | |
c96ce52c | 1000 | s->ext.tick_identity = 0; |
ec15acb6 | 1001 | |
d702ad12 MC |
1002 | /* |
1003 | * Note: At this stage of the code we only support adding a single | |
1004 | * resumption PSK. If we add support for multiple PSKs then the length | |
1005 | * calculations in the padding extension will need to be adjusted. | |
1006 | */ | |
1007 | ||
ec15acb6 | 1008 | /* |
08191294 MC |
1009 | * If this is an incompatible or new session then we have nothing to resume |
1010 | * so don't add this extension. | |
ec15acb6 | 1011 | */ |
08191294 | 1012 | if (s->session->ssl_version != TLS1_3_VERSION |
add8d0e9 | 1013 | || (s->session->ext.ticklen == 0 && s->psksession == NULL)) |
b186a592 | 1014 | return EXT_RETURN_NOT_SENT; |
ec15acb6 | 1015 | |
fc7129dc | 1016 | if (s->hello_retry_request == SSL_HRR_PENDING) |
9368f865 MC |
1017 | handmd = ssl_handshake_md(s); |
1018 | ||
9368f865 | 1019 | if (s->session->ext.ticklen != 0) { |
72257204 | 1020 | /* Get the digest associated with the ciphersuite in the session */ |
9368f865 | 1021 | if (s->session->cipher == NULL) { |
c48ffbcc | 1022 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
635c8f77 | 1023 | return EXT_RETURN_FAIL; |
9368f865 | 1024 | } |
c8f6c28a | 1025 | mdres = ssl_md(s->ctx, s->session->cipher->algorithm2); |
9368f865 | 1026 | if (mdres == NULL) { |
72257204 MC |
1027 | /* |
1028 | * Don't recognize this cipher so we can't use the session. | |
1029 | * Ignore it | |
1030 | */ | |
9368f865 MC |
1031 | goto dopsksess; |
1032 | } | |
1033 | ||
fc7129dc | 1034 | if (s->hello_retry_request == SSL_HRR_PENDING && mdres != handmd) { |
9368f865 | 1035 | /* |
72257204 MC |
1036 | * Selected ciphersuite hash does not match the hash for the session |
1037 | * so we can't use it. | |
9368f865 MC |
1038 | */ |
1039 | goto dopsksess; | |
1040 | } | |
1f5b44e9 | 1041 | |
cf3e221b | 1042 | /* |
9368f865 | 1043 | * Technically the C standard just says time() returns a time_t and says |
72257204 MC |
1044 | * nothing about the encoding of that type. In practice most |
1045 | * implementations follow POSIX which holds it as an integral type in | |
1046 | * seconds since epoch. We've already made the assumption that we can do | |
1047 | * this in multiple places in the code, so portability shouldn't be an | |
1048 | * issue. | |
cf3e221b | 1049 | */ |
9368f865 MC |
1050 | now = (uint32_t)time(NULL); |
1051 | agesec = now - (uint32_t)s->session->time; | |
7e70213f MC |
1052 | /* |
1053 | * We calculate the age in seconds but the server may work in ms. Due to | |
1054 | * rounding errors we could overestimate the age by up to 1s. It is | |
1055 | * better to underestimate it. Otherwise, if the RTT is very short, when | |
1056 | * the server calculates the age reported by the client it could be | |
1057 | * bigger than the age calculated on the server - which should never | |
1058 | * happen. | |
1059 | */ | |
1060 | if (agesec > 0) | |
1061 | agesec--; | |
cf3e221b | 1062 | |
9368f865 MC |
1063 | if (s->session->ext.tick_lifetime_hint < agesec) { |
1064 | /* Ticket is too old. Ignore it. */ | |
1065 | goto dopsksess; | |
1066 | } | |
ec15acb6 | 1067 | |
9368f865 MC |
1068 | /* |
1069 | * Calculate age in ms. We're just doing it to nearest second. Should be | |
1070 | * good enough. | |
1071 | */ | |
1072 | agems = agesec * (uint32_t)1000; | |
fc24f0bf | 1073 | |
9368f865 MC |
1074 | if (agesec != 0 && agems / (uint32_t)1000 != agesec) { |
1075 | /* | |
72257204 MC |
1076 | * Overflow. Shouldn't happen unless this is a *really* old session. |
1077 | * If so we just ignore it. | |
9368f865 MC |
1078 | */ |
1079 | goto dopsksess; | |
1080 | } | |
ec15acb6 | 1081 | |
ec15acb6 | 1082 | /* |
72257204 MC |
1083 | * Obfuscate the age. Overflow here is fine, this addition is supposed |
1084 | * to be mod 2^32. | |
ec15acb6 | 1085 | */ |
9368f865 MC |
1086 | agems += s->session->ext.tick_age_add; |
1087 | ||
ed576acd | 1088 | reshashsize = EVP_MD_get_size(mdres); |
c96ce52c | 1089 | s->ext.tick_identity++; |
9368f865 | 1090 | dores = 1; |
ec15acb6 MC |
1091 | } |
1092 | ||
9368f865 | 1093 | dopsksess: |
add8d0e9 | 1094 | if (!dores && s->psksession == NULL) |
9368f865 | 1095 | return EXT_RETURN_NOT_SENT; |
ec15acb6 | 1096 | |
add8d0e9 | 1097 | if (s->psksession != NULL) { |
c8f6c28a | 1098 | mdpsk = ssl_md(s->ctx, s->psksession->cipher->algorithm2); |
9368f865 MC |
1099 | if (mdpsk == NULL) { |
1100 | /* | |
1101 | * Don't recognize this cipher so we can't use the session. | |
1102 | * If this happens it's an application bug. | |
1103 | */ | |
c48ffbcc | 1104 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_PSK); |
635c8f77 | 1105 | return EXT_RETURN_FAIL; |
9368f865 MC |
1106 | } |
1107 | ||
fc7129dc | 1108 | if (s->hello_retry_request == SSL_HRR_PENDING && mdpsk != handmd) { |
9368f865 MC |
1109 | /* |
1110 | * Selected ciphersuite hash does not match the hash for the PSK | |
1111 | * session. This is an application bug. | |
1112 | */ | |
c48ffbcc | 1113 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_PSK); |
635c8f77 | 1114 | return EXT_RETURN_FAIL; |
9368f865 MC |
1115 | } |
1116 | ||
ed576acd | 1117 | pskhashsize = EVP_MD_get_size(mdpsk); |
9368f865 | 1118 | } |
ec15acb6 MC |
1119 | |
1120 | /* Create the extension, but skip over the binder for now */ | |
1121 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk) | |
1122 | || !WPACKET_start_sub_packet_u16(pkt) | |
9368f865 | 1123 | || !WPACKET_start_sub_packet_u16(pkt)) { |
c48ffbcc | 1124 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
635c8f77 | 1125 | return EXT_RETURN_FAIL; |
9368f865 MC |
1126 | } |
1127 | ||
1128 | if (dores) { | |
1129 | if (!WPACKET_sub_memcpy_u16(pkt, s->session->ext.tick, | |
1130 | s->session->ext.ticklen) | |
1131 | || !WPACKET_put_bytes_u32(pkt, agems)) { | |
c48ffbcc | 1132 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
635c8f77 | 1133 | return EXT_RETURN_FAIL; |
9368f865 MC |
1134 | } |
1135 | } | |
1136 | ||
add8d0e9 MC |
1137 | if (s->psksession != NULL) { |
1138 | if (!WPACKET_sub_memcpy_u16(pkt, s->psksession_id, | |
1139 | s->psksession_id_len) | |
9368f865 | 1140 | || !WPACKET_put_bytes_u32(pkt, 0)) { |
c48ffbcc | 1141 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
635c8f77 | 1142 | return EXT_RETURN_FAIL; |
9368f865 | 1143 | } |
c96ce52c | 1144 | s->ext.tick_identity++; |
9368f865 MC |
1145 | } |
1146 | ||
1147 | if (!WPACKET_close(pkt) | |
ec15acb6 MC |
1148 | || !WPACKET_get_total_written(pkt, &binderoffset) |
1149 | || !WPACKET_start_sub_packet_u16(pkt) | |
9368f865 MC |
1150 | || (dores |
1151 | && !WPACKET_sub_allocate_bytes_u8(pkt, reshashsize, &resbinder)) | |
add8d0e9 | 1152 | || (s->psksession != NULL |
9368f865 | 1153 | && !WPACKET_sub_allocate_bytes_u8(pkt, pskhashsize, &pskbinder)) |
ec15acb6 MC |
1154 | || !WPACKET_close(pkt) |
1155 | || !WPACKET_close(pkt) | |
1156 | || !WPACKET_get_total_written(pkt, &msglen) | |
1157 | /* | |
1158 | * We need to fill in all the sub-packet lengths now so we can | |
1159 | * calculate the HMAC of the message up to the binders | |
1160 | */ | |
1161 | || !WPACKET_fill_lengths(pkt)) { | |
c48ffbcc | 1162 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
635c8f77 | 1163 | return EXT_RETURN_FAIL; |
ec15acb6 MC |
1164 | } |
1165 | ||
1166 | msgstart = WPACKET_get_curr(pkt) - msglen; | |
1167 | ||
72257204 MC |
1168 | if (dores |
1169 | && tls_psk_do_binder(s, mdres, msgstart, binderoffset, NULL, | |
1170 | resbinder, s->session, 1, 0) != 1) { | |
635c8f77 MC |
1171 | /* SSLfatal() already called */ |
1172 | return EXT_RETURN_FAIL; | |
ec15acb6 MC |
1173 | } |
1174 | ||
add8d0e9 | 1175 | if (s->psksession != NULL |
72257204 | 1176 | && tls_psk_do_binder(s, mdpsk, msgstart, binderoffset, NULL, |
add8d0e9 | 1177 | pskbinder, s->psksession, 1, 1) != 1) { |
635c8f77 MC |
1178 | /* SSLfatal() already called */ |
1179 | return EXT_RETURN_FAIL; | |
9368f865 MC |
1180 | } |
1181 | ||
635c8f77 | 1182 | return EXT_RETURN_SENT; |
ec15acb6 | 1183 | #else |
89bc9cf6 | 1184 | return EXT_RETURN_NOT_SENT; |
ec15acb6 MC |
1185 | #endif |
1186 | } | |
1187 | ||
9d75dce3 | 1188 | EXT_RETURN tls_construct_ctos_post_handshake_auth(SSL *s, WPACKET *pkt, |
a7e6a3d8 P |
1189 | ossl_unused unsigned int context, |
1190 | ossl_unused X509 *x, | |
1191 | ossl_unused size_t chainidx) | |
9d75dce3 TS |
1192 | { |
1193 | #ifndef OPENSSL_NO_TLS1_3 | |
32097b33 MC |
1194 | if (!s->pha_enabled) |
1195 | return EXT_RETURN_NOT_SENT; | |
9d75dce3 TS |
1196 | |
1197 | /* construct extension - 0 length, no contents */ | |
1198 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_post_handshake_auth) | |
1199 | || !WPACKET_start_sub_packet_u16(pkt) | |
1200 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1201 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
9d75dce3 TS |
1202 | return EXT_RETURN_FAIL; |
1203 | } | |
1204 | ||
1205 | s->post_handshake_auth = SSL_PHA_EXT_SENT; | |
1206 | ||
1207 | return EXT_RETURN_SENT; | |
1208 | #else | |
1209 | return EXT_RETURN_NOT_SENT; | |
1210 | #endif | |
1211 | } | |
1212 | ||
1213 | ||
6dd083fd MC |
1214 | /* |
1215 | * Parse the server's renegotiation binding and abort if it's not right | |
1216 | */ | |
61138358 | 1217 | int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 1218 | X509 *x, size_t chainidx) |
6dd083fd | 1219 | { |
555cbb32 TS |
1220 | size_t expected_len = s->s3.previous_client_finished_len |
1221 | + s->s3.previous_server_finished_len; | |
6dd083fd MC |
1222 | size_t ilen; |
1223 | const unsigned char *data; | |
1224 | ||
1225 | /* Check for logic errors */ | |
b77f3ed1 | 1226 | if (!ossl_assert(expected_len == 0 |
555cbb32 | 1227 | || s->s3.previous_client_finished_len != 0) |
b77f3ed1 | 1228 | || !ossl_assert(expected_len == 0 |
555cbb32 | 1229 | || s->s3.previous_server_finished_len != 0)) { |
c48ffbcc | 1230 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b77f3ed1 MC |
1231 | return 0; |
1232 | } | |
6dd083fd MC |
1233 | |
1234 | /* Parse the length byte */ | |
1235 | if (!PACKET_get_1_len(pkt, &ilen)) { | |
c48ffbcc | 1236 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_RENEGOTIATION_ENCODING_ERR); |
6dd083fd MC |
1237 | return 0; |
1238 | } | |
1239 | ||
1240 | /* Consistency check */ | |
1241 | if (PACKET_remaining(pkt) != ilen) { | |
c48ffbcc | 1242 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_RENEGOTIATION_ENCODING_ERR); |
6dd083fd MC |
1243 | return 0; |
1244 | } | |
1245 | ||
1246 | /* Check that the extension matches */ | |
1247 | if (ilen != expected_len) { | |
c48ffbcc | 1248 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_RENEGOTIATION_MISMATCH); |
6dd083fd MC |
1249 | return 0; |
1250 | } | |
1251 | ||
555cbb32 TS |
1252 | if (!PACKET_get_bytes(pkt, &data, s->s3.previous_client_finished_len) |
1253 | || memcmp(data, s->s3.previous_client_finished, | |
1254 | s->s3.previous_client_finished_len) != 0) { | |
c48ffbcc | 1255 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_RENEGOTIATION_MISMATCH); |
6dd083fd MC |
1256 | return 0; |
1257 | } | |
1258 | ||
555cbb32 TS |
1259 | if (!PACKET_get_bytes(pkt, &data, s->s3.previous_server_finished_len) |
1260 | || memcmp(data, s->s3.previous_server_finished, | |
1261 | s->s3.previous_server_finished_len) != 0) { | |
c48ffbcc | 1262 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_RENEGOTIATION_MISMATCH); |
6dd083fd MC |
1263 | return 0; |
1264 | } | |
555cbb32 | 1265 | s->s3.send_connection_binding = 1; |
6dd083fd MC |
1266 | |
1267 | return 1; | |
1268 | } | |
1269 | ||
cf72c757 F |
1270 | /* Parse the server's max fragment len extension packet */ |
1271 | int tls_parse_stoc_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context, | |
f63a17d6 | 1272 | X509 *x, size_t chainidx) |
cf72c757 F |
1273 | { |
1274 | unsigned int value; | |
1275 | ||
1276 | if (PACKET_remaining(pkt) != 1 || !PACKET_get_1(pkt, &value)) { | |
c48ffbcc | 1277 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
cf72c757 F |
1278 | return 0; |
1279 | } | |
1280 | ||
1281 | /* |value| should contains a valid max-fragment-length code. */ | |
1282 | if (!IS_MAX_FRAGMENT_LENGTH_EXT_VALID(value)) { | |
f63a17d6 | 1283 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 | 1284 | SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); |
cf72c757 F |
1285 | return 0; |
1286 | } | |
1287 | ||
1288 | /* Must be the same value as client-configured one who was sent to server */ | |
1289 | /*- | |
1290 | * RFC 6066: if a client receives a maximum fragment length negotiation | |
1291 | * response that differs from the length it requested, ... | |
1292 | * It must abort with SSL_AD_ILLEGAL_PARAMETER alert | |
1293 | */ | |
1294 | if (value != s->ext.max_fragment_len_mode) { | |
f63a17d6 | 1295 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 | 1296 | SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); |
cf72c757 F |
1297 | return 0; |
1298 | } | |
1299 | ||
1300 | /* | |
1301 | * Maximum Fragment Length Negotiation succeeded. | |
1302 | * The negotiated Maximum Fragment Length is binding now. | |
1303 | */ | |
1304 | s->session->ext.max_fragment_len_mode = value; | |
1305 | ||
1306 | return 1; | |
1307 | } | |
1308 | ||
61138358 | 1309 | int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 1310 | X509 *x, size_t chainidx) |
6dd083fd | 1311 | { |
fb34a0f4 | 1312 | if (s->ext.hostname == NULL) { |
c48ffbcc | 1313 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
fb34a0f4 MC |
1314 | return 0; |
1315 | } | |
1316 | ||
1317 | if (PACKET_remaining(pkt) > 0) { | |
c48ffbcc | 1318 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
6dd083fd MC |
1319 | return 0; |
1320 | } | |
1321 | ||
1322 | if (!s->hit) { | |
aff8c126 | 1323 | if (s->session->ext.hostname != NULL) { |
c48ffbcc | 1324 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1325 | return 0; |
1326 | } | |
aff8c126 RS |
1327 | s->session->ext.hostname = OPENSSL_strdup(s->ext.hostname); |
1328 | if (s->session->ext.hostname == NULL) { | |
c48ffbcc | 1329 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1330 | return 0; |
1331 | } | |
1332 | } | |
1333 | ||
1334 | return 1; | |
1335 | } | |
1336 | ||
61138358 | 1337 | int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 1338 | X509 *x, size_t chainidx) |
6dd083fd | 1339 | { |
848a950b | 1340 | size_t ecpointformats_len; |
6dd083fd MC |
1341 | PACKET ecptformatlist; |
1342 | ||
1343 | if (!PACKET_as_length_prefixed_1(pkt, &ecptformatlist)) { | |
c48ffbcc | 1344 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
6dd083fd MC |
1345 | return 0; |
1346 | } | |
1347 | if (!s->hit) { | |
aff8c126 | 1348 | ecpointformats_len = PACKET_remaining(&ecptformatlist); |
848a950b | 1349 | if (ecpointformats_len == 0) { |
c48ffbcc | 1350 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_LENGTH); |
848a950b MC |
1351 | return 0; |
1352 | } | |
6dd083fd | 1353 | |
cd0fb43c MC |
1354 | s->ext.peer_ecpointformats_len = 0; |
1355 | OPENSSL_free(s->ext.peer_ecpointformats); | |
1356 | s->ext.peer_ecpointformats = OPENSSL_malloc(ecpointformats_len); | |
1357 | if (s->ext.peer_ecpointformats == NULL) { | |
39a14059 | 1358 | s->ext.peer_ecpointformats_len = 0; |
c48ffbcc | 1359 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1360 | return 0; |
1361 | } | |
1362 | ||
cd0fb43c | 1363 | s->ext.peer_ecpointformats_len = ecpointformats_len; |
6dd083fd MC |
1364 | |
1365 | if (!PACKET_copy_bytes(&ecptformatlist, | |
cd0fb43c | 1366 | s->ext.peer_ecpointformats, |
aff8c126 | 1367 | ecpointformats_len)) { |
c48ffbcc | 1368 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1369 | return 0; |
1370 | } | |
1371 | } | |
1372 | ||
1373 | return 1; | |
1374 | } | |
6dd083fd | 1375 | |
61138358 | 1376 | int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 1377 | X509 *x, size_t chainidx) |
6dd083fd | 1378 | { |
aff8c126 RS |
1379 | if (s->ext.session_ticket_cb != NULL && |
1380 | !s->ext.session_ticket_cb(s, PACKET_data(pkt), | |
1381 | PACKET_remaining(pkt), | |
1382 | s->ext.session_ticket_cb_arg)) { | |
c48ffbcc | 1383 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_BAD_EXTENSION); |
6dd083fd MC |
1384 | return 0; |
1385 | } | |
1266eefd | 1386 | |
fb34a0f4 | 1387 | if (!tls_use_ticket(s)) { |
c48ffbcc | 1388 | SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION, SSL_R_BAD_EXTENSION); |
6dd083fd MC |
1389 | return 0; |
1390 | } | |
fb34a0f4 | 1391 | if (PACKET_remaining(pkt) > 0) { |
c48ffbcc | 1392 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
fb34a0f4 MC |
1393 | return 0; |
1394 | } | |
1266eefd | 1395 | |
aff8c126 | 1396 | s->ext.ticket_expected = 1; |
6dd083fd MC |
1397 | |
1398 | return 1; | |
1399 | } | |
1400 | ||
ab83e314 | 1401 | #ifndef OPENSSL_NO_OCSP |
61138358 | 1402 | int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 1403 | X509 *x, size_t chainidx) |
6dd083fd | 1404 | { |
5de683d2 MC |
1405 | if (context == SSL_EXT_TLS1_3_CERTIFICATE_REQUEST) { |
1406 | /* We ignore this if the server sends a CertificateRequest */ | |
5de683d2 MC |
1407 | return 1; |
1408 | } | |
1409 | ||
6dd083fd | 1410 | /* |
f63e4288 MC |
1411 | * MUST only be sent if we've requested a status |
1412 | * request message. In TLS <= 1.2 it must also be empty. | |
6dd083fd | 1413 | */ |
fb34a0f4 | 1414 | if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) { |
c48ffbcc | 1415 | SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION, SSL_R_BAD_EXTENSION); |
6dd083fd MC |
1416 | return 0; |
1417 | } | |
fb34a0f4 | 1418 | if (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) > 0) { |
c48ffbcc | 1419 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
fb34a0f4 MC |
1420 | return 0; |
1421 | } | |
f63e4288 MC |
1422 | |
1423 | if (SSL_IS_TLS13(s)) { | |
1424 | /* We only know how to handle this if it's for the first Certificate in | |
1ee4b98e | 1425 | * the chain. We ignore any other responses. |
f63e4288 | 1426 | */ |
8521ced6 | 1427 | if (chainidx != 0) |
f63e4288 | 1428 | return 1; |
f63a17d6 MC |
1429 | |
1430 | /* SSLfatal() already called */ | |
1431 | return tls_process_cert_status_body(s, pkt); | |
f63e4288 MC |
1432 | } |
1433 | ||
6dd083fd | 1434 | /* Set flag to expect CertificateStatus message */ |
aff8c126 | 1435 | s->ext.status_expected = 1; |
6dd083fd MC |
1436 | |
1437 | return 1; | |
1438 | } | |
ab83e314 | 1439 | #endif |
6dd083fd MC |
1440 | |
1441 | ||
1442 | #ifndef OPENSSL_NO_CT | |
61138358 | 1443 | int tls_parse_stoc_sct(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1444 | size_t chainidx) |
6dd083fd | 1445 | { |
5de683d2 MC |
1446 | if (context == SSL_EXT_TLS1_3_CERTIFICATE_REQUEST) { |
1447 | /* We ignore this if the server sends it in a CertificateRequest */ | |
5de683d2 MC |
1448 | return 1; |
1449 | } | |
1450 | ||
6dd083fd MC |
1451 | /* |
1452 | * Only take it if we asked for it - i.e if there is no CT validation | |
1453 | * callback set, then a custom extension MAY be processing it, so we | |
1454 | * need to let control continue to flow to that. | |
1455 | */ | |
1456 | if (s->ct_validation_callback != NULL) { | |
1457 | size_t size = PACKET_remaining(pkt); | |
1458 | ||
1459 | /* Simply copy it off for later processing */ | |
aff8c126 RS |
1460 | OPENSSL_free(s->ext.scts); |
1461 | s->ext.scts = NULL; | |
1266eefd | 1462 | |
3a63c0ed | 1463 | s->ext.scts_len = (uint16_t)size; |
6dd083fd | 1464 | if (size > 0) { |
aff8c126 | 1465 | s->ext.scts = OPENSSL_malloc(size); |
39a14059 MC |
1466 | if (s->ext.scts == NULL) { |
1467 | s->ext.scts_len = 0; | |
1468 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); | |
1469 | return 0; | |
1470 | } | |
1471 | if (!PACKET_copy_bytes(pkt, s->ext.scts, size)) { | |
c48ffbcc | 1472 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1473 | return 0; |
1474 | } | |
1475 | } | |
1476 | } else { | |
b186a592 MC |
1477 | ENDPOINT role = (context & SSL_EXT_TLS1_2_SERVER_HELLO) != 0 |
1478 | ? ENDPOINT_CLIENT : ENDPOINT_BOTH; | |
1479 | ||
1480 | /* | |
1481 | * If we didn't ask for it then there must be a custom extension, | |
1482 | * otherwise this is unsolicited. | |
1483 | */ | |
1484 | if (custom_ext_find(&s->cert->custext, role, | |
1485 | TLSEXT_TYPE_signed_certificate_timestamp, | |
1486 | NULL) == NULL) { | |
c48ffbcc | 1487 | SSLfatal(s, TLS1_AD_UNSUPPORTED_EXTENSION, SSL_R_BAD_EXTENSION); |
b186a592 MC |
1488 | return 0; |
1489 | } | |
1490 | ||
f63a17d6 | 1491 | if (!custom_ext_parse(s, context, |
43ae5eed MC |
1492 | TLSEXT_TYPE_signed_certificate_timestamp, |
1493 | PACKET_data(pkt), PACKET_remaining(pkt), | |
f63a17d6 MC |
1494 | x, chainidx)) { |
1495 | /* SSLfatal already called */ | |
6dd083fd | 1496 | return 0; |
f63a17d6 | 1497 | } |
6dd083fd MC |
1498 | } |
1499 | ||
1500 | return 1; | |
1501 | } | |
1502 | #endif | |
1503 | ||
1504 | ||
1505 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
1506 | /* | |
1507 | * ssl_next_proto_validate validates a Next Protocol Negotiation block. No | |
1508 | * elements of zero length are allowed and the set of elements must exactly | |
1509 | * fill the length of the block. Returns 1 on success or 0 on failure. | |
1510 | */ | |
f63a17d6 | 1511 | static int ssl_next_proto_validate(SSL *s, PACKET *pkt) |
6dd083fd MC |
1512 | { |
1513 | PACKET tmp_protocol; | |
1514 | ||
1515 | while (PACKET_remaining(pkt)) { | |
1516 | if (!PACKET_get_length_prefixed_1(pkt, &tmp_protocol) | |
f63a17d6 | 1517 | || PACKET_remaining(&tmp_protocol) == 0) { |
c48ffbcc | 1518 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
6dd083fd | 1519 | return 0; |
f63a17d6 | 1520 | } |
6dd083fd MC |
1521 | } |
1522 | ||
1523 | return 1; | |
1524 | } | |
1525 | ||
61138358 | 1526 | int tls_parse_stoc_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1527 | size_t chainidx) |
6dd083fd MC |
1528 | { |
1529 | unsigned char *selected; | |
1530 | unsigned char selected_len; | |
1531 | PACKET tmppkt; | |
1532 | ||
1266eefd | 1533 | /* Check if we are in a renegotiation. If so ignore this extension */ |
c7f47786 | 1534 | if (!SSL_IS_FIRST_HANDSHAKE(s)) |
6dd083fd MC |
1535 | return 1; |
1536 | ||
1537 | /* We must have requested it. */ | |
aff8c126 | 1538 | if (s->ctx->ext.npn_select_cb == NULL) { |
c48ffbcc | 1539 | SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION, SSL_R_BAD_EXTENSION); |
6dd083fd MC |
1540 | return 0; |
1541 | } | |
1266eefd | 1542 | |
6dd083fd MC |
1543 | /* The data must be valid */ |
1544 | tmppkt = *pkt; | |
f63a17d6 MC |
1545 | if (!ssl_next_proto_validate(s, &tmppkt)) { |
1546 | /* SSLfatal() already called */ | |
6dd083fd MC |
1547 | return 0; |
1548 | } | |
aff8c126 RS |
1549 | if (s->ctx->ext.npn_select_cb(s, &selected, &selected_len, |
1550 | PACKET_data(pkt), | |
1551 | PACKET_remaining(pkt), | |
1552 | s->ctx->ext.npn_select_cb_arg) != | |
6dd083fd | 1553 | SSL_TLSEXT_ERR_OK) { |
c48ffbcc | 1554 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_BAD_EXTENSION); |
6dd083fd MC |
1555 | return 0; |
1556 | } | |
1266eefd | 1557 | |
6dd083fd MC |
1558 | /* |
1559 | * Could be non-NULL if server has sent multiple NPN extensions in | |
1560 | * a single Serverhello | |
1561 | */ | |
aff8c126 RS |
1562 | OPENSSL_free(s->ext.npn); |
1563 | s->ext.npn = OPENSSL_malloc(selected_len); | |
1564 | if (s->ext.npn == NULL) { | |
39a14059 | 1565 | s->ext.npn_len = 0; |
c48ffbcc | 1566 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1567 | return 0; |
1568 | } | |
1569 | ||
aff8c126 RS |
1570 | memcpy(s->ext.npn, selected, selected_len); |
1571 | s->ext.npn_len = selected_len; | |
555cbb32 | 1572 | s->s3.npn_seen = 1; |
6dd083fd MC |
1573 | |
1574 | return 1; | |
1575 | } | |
1576 | #endif | |
1577 | ||
61138358 | 1578 | int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1579 | size_t chainidx) |
6dd083fd MC |
1580 | { |
1581 | size_t len; | |
1582 | ||
1583 | /* We must have requested it. */ | |
555cbb32 | 1584 | if (!s->s3.alpn_sent) { |
c48ffbcc | 1585 | SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION, SSL_R_BAD_EXTENSION); |
6dd083fd MC |
1586 | return 0; |
1587 | } | |
1588 | /*- | |
1589 | * The extension data consists of: | |
1590 | * uint16 list_length | |
1591 | * uint8 proto_length; | |
1592 | * uint8 proto[proto_length]; | |
1593 | */ | |
1594 | if (!PACKET_get_net_2_len(pkt, &len) | |
1595 | || PACKET_remaining(pkt) != len || !PACKET_get_1_len(pkt, &len) | |
1596 | || PACKET_remaining(pkt) != len) { | |
c48ffbcc | 1597 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
6dd083fd MC |
1598 | return 0; |
1599 | } | |
555cbb32 TS |
1600 | OPENSSL_free(s->s3.alpn_selected); |
1601 | s->s3.alpn_selected = OPENSSL_malloc(len); | |
1602 | if (s->s3.alpn_selected == NULL) { | |
39a14059 | 1603 | s->s3.alpn_selected_len = 0; |
c48ffbcc | 1604 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1605 | return 0; |
1606 | } | |
555cbb32 | 1607 | if (!PACKET_copy_bytes(pkt, s->s3.alpn_selected, len)) { |
c48ffbcc | 1608 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
6dd083fd MC |
1609 | return 0; |
1610 | } | |
555cbb32 | 1611 | s->s3.alpn_selected_len = len; |
6dd083fd | 1612 | |
0ef28021 MC |
1613 | if (s->session->ext.alpn_selected == NULL |
1614 | || s->session->ext.alpn_selected_len != len | |
555cbb32 | 1615 | || memcmp(s->session->ext.alpn_selected, s->s3.alpn_selected, len) |
0ef28021 | 1616 | != 0) { |
4be3a7c7 MC |
1617 | /* ALPN not consistent with the old session so cannot use early_data */ |
1618 | s->ext.early_data_ok = 0; | |
1619 | } | |
1620 | if (!s->hit) { | |
9d5db9c9 MC |
1621 | /* |
1622 | * This is a new session and so alpn_selected should have been | |
1623 | * initialised to NULL. We should update it with the selected ALPN. | |
1624 | */ | |
1625 | if (!ossl_assert(s->session->ext.alpn_selected == NULL)) { | |
c48ffbcc | 1626 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
9d5db9c9 MC |
1627 | return 0; |
1628 | } | |
4be3a7c7 | 1629 | s->session->ext.alpn_selected = |
555cbb32 | 1630 | OPENSSL_memdup(s->s3.alpn_selected, s->s3.alpn_selected_len); |
4be3a7c7 | 1631 | if (s->session->ext.alpn_selected == NULL) { |
39a14059 | 1632 | s->session->ext.alpn_selected_len = 0; |
c48ffbcc | 1633 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
4be3a7c7 MC |
1634 | return 0; |
1635 | } | |
555cbb32 | 1636 | s->session->ext.alpn_selected_len = s->s3.alpn_selected_len; |
ae8d7d99 MC |
1637 | } |
1638 | ||
6dd083fd MC |
1639 | return 1; |
1640 | } | |
1641 | ||
1642 | #ifndef OPENSSL_NO_SRTP | |
61138358 | 1643 | int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1644 | size_t chainidx) |
6dd083fd MC |
1645 | { |
1646 | unsigned int id, ct, mki; | |
1647 | int i; | |
1648 | STACK_OF(SRTP_PROTECTION_PROFILE) *clnt; | |
1649 | SRTP_PROTECTION_PROFILE *prof; | |
1650 | ||
1266eefd MC |
1651 | if (!PACKET_get_net_2(pkt, &ct) || ct != 2 |
1652 | || !PACKET_get_net_2(pkt, &id) | |
1653 | || !PACKET_get_1(pkt, &mki) | |
1654 | || PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 1655 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
f63a17d6 | 1656 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
6dd083fd MC |
1657 | return 0; |
1658 | } | |
1659 | ||
1660 | if (mki != 0) { | |
1661 | /* Must be no MKI, since we never offer one */ | |
c48ffbcc | 1662 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_SRTP_MKI_VALUE); |
6dd083fd MC |
1663 | return 0; |
1664 | } | |
1665 | ||
6dd083fd | 1666 | /* Throw an error if the server gave us an unsolicited extension */ |
1266eefd | 1667 | clnt = SSL_get_srtp_profiles(s); |
6dd083fd | 1668 | if (clnt == NULL) { |
c48ffbcc | 1669 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_NO_SRTP_PROFILES); |
6dd083fd MC |
1670 | return 0; |
1671 | } | |
1672 | ||
1673 | /* | |
1674 | * Check to see if the server gave us something we support (and | |
1675 | * presumably offered) | |
1676 | */ | |
1677 | for (i = 0; i < sk_SRTP_PROTECTION_PROFILE_num(clnt); i++) { | |
1678 | prof = sk_SRTP_PROTECTION_PROFILE_value(clnt, i); | |
1679 | ||
1680 | if (prof->id == id) { | |
1681 | s->srtp_profile = prof; | |
6dd083fd MC |
1682 | return 1; |
1683 | } | |
1684 | } | |
1685 | ||
c48ffbcc | 1686 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
f63a17d6 | 1687 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
6dd083fd MC |
1688 | return 0; |
1689 | } | |
1690 | #endif | |
1691 | ||
61138358 | 1692 | int tls_parse_stoc_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1693 | size_t chainidx) |
6dd083fd MC |
1694 | { |
1695 | /* Ignore if inappropriate ciphersuite */ | |
1696 | if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC) | |
555cbb32 TS |
1697 | && s->s3.tmp.new_cipher->algorithm_mac != SSL_AEAD |
1698 | && s->s3.tmp.new_cipher->algorithm_enc != SSL_RC4) | |
28a31a0a | 1699 | s->ext.use_etm = 1; |
6dd083fd MC |
1700 | |
1701 | return 1; | |
1702 | } | |
1703 | ||
61138358 | 1704 | int tls_parse_stoc_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1705 | size_t chainidx) |
6dd083fd | 1706 | { |
088dfa13 TS |
1707 | if (s->options & SSL_OP_NO_EXTENDED_MASTER_SECRET) |
1708 | return 1; | |
555cbb32 | 1709 | s->s3.flags |= TLS1_FLAGS_RECEIVED_EXTMS; |
6dd083fd MC |
1710 | if (!s->hit) |
1711 | s->session->flags |= SSL_SESS_FLAG_EXTMS; | |
1712 | ||
1713 | return 1; | |
1714 | } | |
1715 | ||
88050dd1 MC |
1716 | int tls_parse_stoc_supported_versions(SSL *s, PACKET *pkt, unsigned int context, |
1717 | X509 *x, size_t chainidx) | |
1718 | { | |
1719 | unsigned int version; | |
1720 | ||
1721 | if (!PACKET_get_net_2(pkt, &version) | |
1722 | || PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 1723 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
88050dd1 MC |
1724 | return 0; |
1725 | } | |
1726 | ||
27e462f1 MC |
1727 | /* |
1728 | * The only protocol version we support which is valid in this extension in | |
1729 | * a ServerHello is TLSv1.3 therefore we shouldn't be getting anything else. | |
1730 | */ | |
1731 | if (version != TLS1_3_VERSION) { | |
1732 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, | |
27e462f1 MC |
1733 | SSL_R_BAD_PROTOCOL_VERSION_NUMBER); |
1734 | return 0; | |
1735 | } | |
1736 | ||
426dfc9f | 1737 | /* We ignore this extension for HRRs except to sanity check it */ |
27e462f1 | 1738 | if (context == SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST) |
426dfc9f | 1739 | return 1; |
426dfc9f | 1740 | |
88050dd1 MC |
1741 | /* We just set it here. We validate it in ssl_choose_client_version */ |
1742 | s->version = version; | |
1743 | ||
1744 | return 1; | |
1745 | } | |
1746 | ||
61138358 | 1747 | int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1748 | size_t chainidx) |
6dd083fd | 1749 | { |
3cf96e88 | 1750 | #ifndef OPENSSL_NO_TLS1_3 |
6dd083fd MC |
1751 | unsigned int group_id; |
1752 | PACKET encoded_pt; | |
555cbb32 | 1753 | EVP_PKEY *ckey = s->s3.tmp.pkey, *skey = NULL; |
a011b586 | 1754 | const TLS_GROUP_INFO *ginf = NULL; |
6dd083fd MC |
1755 | |
1756 | /* Sanity check */ | |
555cbb32 | 1757 | if (ckey == NULL || s->s3.peer_tmp != NULL) { |
c48ffbcc | 1758 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1759 | return 0; |
1760 | } | |
1761 | ||
1762 | if (!PACKET_get_net_2(pkt, &group_id)) { | |
c48ffbcc | 1763 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
6dd083fd MC |
1764 | return 0; |
1765 | } | |
1766 | ||
0a10825a | 1767 | group_id = ssl_group_id_tls13_to_internal(group_id); |
fe874d27 | 1768 | if ((context & SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST) != 0) { |
f48d826e DSH |
1769 | const uint16_t *pgroups = NULL; |
1770 | size_t i, num_groups; | |
3847d426 MC |
1771 | |
1772 | if (PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 1773 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
3847d426 MC |
1774 | return 0; |
1775 | } | |
1776 | ||
1777 | /* | |
1778 | * It is an error if the HelloRetryRequest wants a key_share that we | |
1779 | * already sent in the first ClientHello | |
1780 | */ | |
555cbb32 | 1781 | if (group_id == s->s3.group_id) { |
c48ffbcc | 1782 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_KEY_SHARE); |
3847d426 MC |
1783 | return 0; |
1784 | } | |
1785 | ||
1786 | /* Validate the selected group is one we support */ | |
f48d826e DSH |
1787 | tls1_get_supported_groups(s, &pgroups, &num_groups); |
1788 | for (i = 0; i < num_groups; i++) { | |
1789 | if (group_id == pgroups[i]) | |
3847d426 MC |
1790 | break; |
1791 | } | |
f48d826e | 1792 | if (i >= num_groups |
dbc6268f | 1793 | || !tls_group_allowed(s, group_id, SSL_SECOP_CURVE_SUPPORTED)) { |
c48ffbcc | 1794 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_KEY_SHARE); |
3847d426 MC |
1795 | return 0; |
1796 | } | |
1797 | ||
555cbb32 TS |
1798 | s->s3.group_id = group_id; |
1799 | EVP_PKEY_free(s->s3.tmp.pkey); | |
1800 | s->s3.tmp.pkey = NULL; | |
3847d426 MC |
1801 | return 1; |
1802 | } | |
1803 | ||
555cbb32 | 1804 | if (group_id != s->s3.group_id) { |
6dd083fd MC |
1805 | /* |
1806 | * This isn't for the group that we sent in the original | |
1807 | * key_share! | |
1808 | */ | |
c48ffbcc | 1809 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_KEY_SHARE); |
6dd083fd MC |
1810 | return 0; |
1811 | } | |
aa6bd216 BK |
1812 | /* Retain this group in the SSL_SESSION */ |
1813 | if (!s->hit) { | |
1814 | s->session->kex_group = group_id; | |
1815 | } else if (group_id != s->session->kex_group) { | |
1816 | /* | |
1817 | * If this is a resumption but changed what group was used, we need | |
1818 | * to record the new group in the session, but the session is not | |
1819 | * a new session and could be in use by other threads. So, make | |
1820 | * a copy of the session to record the new information so that it's | |
1821 | * useful for any sessions resumed from tickets issued on this | |
1822 | * connection. | |
1823 | */ | |
1824 | SSL_SESSION *new_sess; | |
1825 | ||
1826 | if ((new_sess = ssl_session_dup(s->session, 0)) == NULL) { | |
1827 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); | |
1828 | return 0; | |
1829 | } | |
1830 | SSL_SESSION_free(s->session); | |
1831 | s->session = new_sess; | |
1832 | s->session->kex_group = group_id; | |
1833 | } | |
6dd083fd | 1834 | |
a011b586 | 1835 | if ((ginf = tls1_group_id_lookup(s->ctx, group_id)) == NULL) { |
c48ffbcc | 1836 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_KEY_SHARE); |
a011b586 NT |
1837 | return 0; |
1838 | } | |
1839 | ||
6dd083fd MC |
1840 | if (!PACKET_as_length_prefixed_2(pkt, &encoded_pt) |
1841 | || PACKET_remaining(&encoded_pt) == 0) { | |
c48ffbcc | 1842 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
6dd083fd MC |
1843 | return 0; |
1844 | } | |
1845 | ||
a011b586 NT |
1846 | if (!ginf->is_kem) { |
1847 | /* Regular KEX */ | |
1848 | skey = EVP_PKEY_new(); | |
1849 | if (skey == NULL || EVP_PKEY_copy_parameters(skey, ckey) <= 0) { | |
c48ffbcc | 1850 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_COPY_PARAMETERS_FAILED); |
b3c34401 | 1851 | EVP_PKEY_free(skey); |
a011b586 NT |
1852 | return 0; |
1853 | } | |
afce590b | 1854 | |
5ac8fb58 MC |
1855 | if (EVP_PKEY_set1_encoded_public_key(skey, PACKET_data(&encoded_pt), |
1856 | PACKET_remaining(&encoded_pt)) <= 0) { | |
c48ffbcc | 1857 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_ECPOINT); |
a011b586 NT |
1858 | EVP_PKEY_free(skey); |
1859 | return 0; | |
1860 | } | |
6dd083fd | 1861 | |
a011b586 NT |
1862 | if (ssl_derive(s, ckey, skey, 1) == 0) { |
1863 | /* SSLfatal() already called */ | |
1864 | EVP_PKEY_free(skey); | |
1865 | return 0; | |
1866 | } | |
1867 | s->s3.peer_tmp = skey; | |
1868 | } else { | |
1869 | /* KEM Mode */ | |
1870 | const unsigned char *ct = PACKET_data(&encoded_pt); | |
1871 | size_t ctlen = PACKET_remaining(&encoded_pt); | |
1872 | ||
1873 | if (ssl_decapsulate(s, ckey, ct, ctlen, 1) == 0) { | |
1874 | /* SSLfatal() already called */ | |
1875 | return 0; | |
1876 | } | |
6dd083fd | 1877 | } |
aa6bd216 | 1878 | s->s3.did_kex = 1; |
3cf96e88 | 1879 | #endif |
6dd083fd MC |
1880 | |
1881 | return 1; | |
1882 | } | |
4ff65f77 | 1883 | |
cfef5027 | 1884 | int tls_parse_stoc_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1885 | size_t chainidx) |
cfef5027 MC |
1886 | { |
1887 | PACKET cookie; | |
1888 | ||
1889 | if (!PACKET_as_length_prefixed_2(pkt, &cookie) | |
1890 | || !PACKET_memdup(&cookie, &s->ext.tls13_cookie, | |
1891 | &s->ext.tls13_cookie_len)) { | |
c48ffbcc | 1892 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
cfef5027 MC |
1893 | return 0; |
1894 | } | |
1895 | ||
1896 | return 1; | |
1897 | } | |
1898 | ||
38df5a45 | 1899 | int tls_parse_stoc_early_data(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 1900 | X509 *x, size_t chainidx) |
38df5a45 | 1901 | { |
fe874d27 | 1902 | if (context == SSL_EXT_TLS1_3_NEW_SESSION_TICKET) { |
6594189f MC |
1903 | unsigned long max_early_data; |
1904 | ||
1905 | if (!PACKET_get_net_4(pkt, &max_early_data) | |
1906 | || PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 1907 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_INVALID_MAX_EARLY_DATA); |
6594189f MC |
1908 | return 0; |
1909 | } | |
1910 | ||
1911 | s->session->ext.max_early_data = max_early_data; | |
1912 | ||
1913 | return 1; | |
1914 | } | |
1915 | ||
38df5a45 | 1916 | if (PACKET_remaining(pkt) != 0) { |
c48ffbcc | 1917 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
38df5a45 MC |
1918 | return 0; |
1919 | } | |
1920 | ||
4be3a7c7 | 1921 | if (!s->ext.early_data_ok |
c96ce52c | 1922 | || !s->hit) { |
38df5a45 MC |
1923 | /* |
1924 | * If we get here then we didn't send early data, or we didn't resume | |
4be3a7c7 MC |
1925 | * using the first identity, or the SNI/ALPN is not consistent so the |
1926 | * server should not be accepting it. | |
38df5a45 | 1927 | */ |
c48ffbcc | 1928 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_EXTENSION); |
38df5a45 MC |
1929 | return 0; |
1930 | } | |
1931 | ||
1932 | s->ext.early_data = SSL_EARLY_DATA_ACCEPTED; | |
1933 | ||
1934 | return 1; | |
1935 | } | |
1936 | ||
61138358 | 1937 | int tls_parse_stoc_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1938 | size_t chainidx) |
4ff65f77 MC |
1939 | { |
1940 | #ifndef OPENSSL_NO_TLS1_3 | |
1941 | unsigned int identity; | |
1942 | ||
1943 | if (!PACKET_get_net_2(pkt, &identity) || PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 1944 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
4ff65f77 MC |
1945 | return 0; |
1946 | } | |
1947 | ||
c96ce52c | 1948 | if (identity >= (unsigned int)s->ext.tick_identity) { |
c48ffbcc | 1949 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_PSK_IDENTITY); |
c96ce52c MC |
1950 | return 0; |
1951 | } | |
1952 | ||
1953 | /* | |
1954 | * Session resumption tickets are always sent before PSK tickets. If the | |
1955 | * ticket index is 0 then it must be for a session resumption ticket if we | |
1956 | * sent two tickets, or if we didn't send a PSK ticket. | |
1957 | */ | |
1958 | if (identity == 0 && (s->psksession == NULL || s->ext.tick_identity == 2)) { | |
9368f865 MC |
1959 | s->hit = 1; |
1960 | SSL_SESSION_free(s->psksession); | |
1961 | s->psksession = NULL; | |
1962 | return 1; | |
1963 | } | |
1964 | ||
c96ce52c MC |
1965 | if (s->psksession == NULL) { |
1966 | /* Should never happen */ | |
c48ffbcc | 1967 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
4ff65f77 MC |
1968 | return 0; |
1969 | } | |
1970 | ||
add8d0e9 MC |
1971 | /* |
1972 | * If we used the external PSK for sending early_data then s->early_secret | |
1973 | * is already set up, so don't overwrite it. Otherwise we copy the | |
1974 | * early_secret across that we generated earlier. | |
1975 | */ | |
1976 | if ((s->early_data_state != SSL_EARLY_DATA_WRITE_RETRY | |
1977 | && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING) | |
1978 | || s->session->ext.max_early_data > 0 | |
1979 | || s->psksession->ext.max_early_data == 0) | |
1980 | memcpy(s->early_secret, s->psksession->early_secret, EVP_MAX_MD_SIZE); | |
1981 | ||
9368f865 MC |
1982 | SSL_SESSION_free(s->session); |
1983 | s->session = s->psksession; | |
1984 | s->psksession = NULL; | |
4ff65f77 | 1985 | s->hit = 1; |
c96ce52c MC |
1986 | /* Early data is only allowed if we used the first ticket */ |
1987 | if (identity != 0) | |
1988 | s->ext.early_data_ok = 0; | |
4ff65f77 MC |
1989 | #endif |
1990 | ||
1991 | return 1; | |
1992 | } |