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6dd083fd | 1 | /* |
fecb3aae | 2 | * Copyright 2016-2022 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 | |
38b051a1 | 15 | EXT_RETURN tls_construct_ctos_renegotiate(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 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 | ||
38b051a1 | 35 | EXT_RETURN tls_construct_ctos_server_name(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 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 | 60 | /* Push a Max Fragment Len extension into ClientHello */ |
38b051a1 | 61 | EXT_RETURN tls_construct_ctos_maxfragmentlen(SSL_CONNECTION *s, WPACKET *pkt, |
cf72c757 | 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 |
38b051a1 TM |
86 | EXT_RETURN tls_construct_ctos_srp(SSL_CONNECTION *s, WPACKET *pkt, |
87 | unsigned int context, | |
f63a17d6 | 88 | X509 *x, size_t chainidx) |
ab83e314 MC |
89 | { |
90 | /* Add SRP username if there is one */ | |
91 | if (s->srp_ctx.login == NULL) | |
b186a592 | 92 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
93 | |
94 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_srp) | |
95 | /* Sub-packet for SRP extension */ | |
96 | || !WPACKET_start_sub_packet_u16(pkt) | |
97 | || !WPACKET_start_sub_packet_u8(pkt) | |
98 | /* login must not be zero...internal error if so */ | |
99 | || !WPACKET_set_flags(pkt, WPACKET_FLAGS_NON_ZERO_LENGTH) | |
100 | || !WPACKET_memcpy(pkt, s->srp_ctx.login, | |
101 | strlen(s->srp_ctx.login)) | |
102 | || !WPACKET_close(pkt) | |
103 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 104 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 105 | return EXT_RETURN_FAIL; |
ab83e314 MC |
106 | } |
107 | ||
b186a592 | 108 | return EXT_RETURN_SENT; |
ab83e314 MC |
109 | } |
110 | #endif | |
111 | ||
38b051a1 | 112 | static int use_ecc(SSL_CONNECTION *s, int min_version, int max_version) |
ab83e314 | 113 | { |
589b6227 | 114 | int i, end, ret = 0; |
ab83e314 MC |
115 | unsigned long alg_k, alg_a; |
116 | STACK_OF(SSL_CIPHER) *cipher_stack = NULL; | |
dbc6268f MC |
117 | const uint16_t *pgroups = NULL; |
118 | size_t num_groups, j; | |
38b051a1 | 119 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
ab83e314 MC |
120 | |
121 | /* See if we support any ECC ciphersuites */ | |
122 | if (s->version == SSL3_VERSION) | |
123 | return 0; | |
124 | ||
38b051a1 | 125 | cipher_stack = SSL_get1_supported_ciphers(ssl); |
1266eefd MC |
126 | end = sk_SSL_CIPHER_num(cipher_stack); |
127 | for (i = 0; i < end; i++) { | |
ab83e314 MC |
128 | const SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i); |
129 | ||
130 | alg_k = c->algorithm_mkey; | |
131 | alg_a = c->algorithm_auth; | |
132 | if ((alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) | |
1266eefd | 133 | || (alg_a & SSL_aECDSA) |
589b6227 MC |
134 | || c->min_tls >= TLS1_3_VERSION) { |
135 | ret = 1; | |
136 | break; | |
137 | } | |
ab83e314 | 138 | } |
589b6227 | 139 | sk_SSL_CIPHER_free(cipher_stack); |
dbc6268f MC |
140 | if (!ret) |
141 | return 0; | |
142 | ||
143 | /* Check we have at least one EC supported group */ | |
144 | tls1_get_supported_groups(s, &pgroups, &num_groups); | |
145 | for (j = 0; j < num_groups; j++) { | |
146 | uint16_t ctmp = pgroups[j]; | |
147 | ||
8b1db5d3 | 148 | if (tls_valid_group(s, ctmp, min_version, max_version, 1, NULL) |
dbc6268f MC |
149 | && tls_group_allowed(s, ctmp, SSL_SECOP_CURVE_SUPPORTED)) |
150 | return 1; | |
151 | } | |
152 | ||
153 | return 0; | |
ab83e314 MC |
154 | } |
155 | ||
38b051a1 | 156 | EXT_RETURN tls_construct_ctos_ec_pt_formats(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 157 | unsigned int context, X509 *x, |
f63a17d6 | 158 | size_t chainidx) |
ab83e314 MC |
159 | { |
160 | const unsigned char *pformats; | |
161 | size_t num_formats; | |
dbc6268f | 162 | int reason, min_version, max_version; |
ab83e314 | 163 | |
dbc6268f MC |
164 | reason = ssl_get_min_max_version(s, &min_version, &max_version, NULL); |
165 | if (reason != 0) { | |
c48ffbcc | 166 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, reason); |
dbc6268f MC |
167 | return EXT_RETURN_FAIL; |
168 | } | |
9d2d857f | 169 | if (!use_ecc(s, min_version, max_version)) |
b186a592 | 170 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
171 | |
172 | /* Add TLS extension ECPointFormats to the ClientHello message */ | |
ab83e314 MC |
173 | tls1_get_formatlist(s, &pformats, &num_formats); |
174 | ||
175 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_ec_point_formats) | |
176 | /* Sub-packet for formats extension */ | |
177 | || !WPACKET_start_sub_packet_u16(pkt) | |
178 | || !WPACKET_sub_memcpy_u8(pkt, pformats, num_formats) | |
179 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 180 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 181 | return EXT_RETURN_FAIL; |
ab83e314 MC |
182 | } |
183 | ||
b186a592 | 184 | return EXT_RETURN_SENT; |
ab83e314 MC |
185 | } |
186 | ||
38b051a1 | 187 | EXT_RETURN tls_construct_ctos_supported_groups(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 188 | unsigned int context, X509 *x, |
f63a17d6 | 189 | size_t chainidx) |
ab83e314 | 190 | { |
f48d826e | 191 | const uint16_t *pgroups = NULL; |
8b1db5d3 | 192 | size_t num_groups = 0, i, tls13added = 0, added = 0; |
9aaecbfc | 193 | int min_version, max_version, reason; |
ab83e314 | 194 | |
9aaecbfc | 195 | reason = ssl_get_min_max_version(s, &min_version, &max_version, NULL); |
196 | if (reason != 0) { | |
c48ffbcc | 197 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, reason); |
9aaecbfc | 198 | return EXT_RETURN_FAIL; |
199 | } | |
200 | ||
8b1db5d3 MC |
201 | /* |
202 | * We only support EC groups in TLSv1.2 or below, and in DTLS. Therefore | |
203 | * if we don't have EC support then we don't send this extension. | |
204 | */ | |
205 | if (!use_ecc(s, min_version, max_version) | |
38b051a1 | 206 | && (SSL_CONNECTION_IS_DTLS(s) || max_version < TLS1_3_VERSION)) |
dbc6268f | 207 | return EXT_RETURN_NOT_SENT; |
dbc6268f | 208 | |
ab83e314 MC |
209 | /* |
210 | * Add TLS extension supported_groups to the ClientHello message | |
211 | */ | |
f48d826e | 212 | tls1_get_supported_groups(s, &pgroups, &num_groups); |
ab83e314 MC |
213 | |
214 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_groups) | |
215 | /* Sub-packet for supported_groups extension */ | |
216 | || !WPACKET_start_sub_packet_u16(pkt) | |
9aaecbfc | 217 | || !WPACKET_start_sub_packet_u16(pkt) |
218 | || !WPACKET_set_flags(pkt, WPACKET_FLAGS_NON_ZERO_LENGTH)) { | |
c48ffbcc | 219 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 220 | return EXT_RETURN_FAIL; |
ab83e314 | 221 | } |
9aaecbfc | 222 | /* Copy group ID if supported */ |
f48d826e DSH |
223 | for (i = 0; i < num_groups; i++) { |
224 | uint16_t ctmp = pgroups[i]; | |
8b1db5d3 | 225 | int okfortls13; |
9e84a42d | 226 | |
8b1db5d3 | 227 | if (tls_valid_group(s, ctmp, min_version, max_version, 0, &okfortls13) |
dbc6268f | 228 | && tls_group_allowed(s, ctmp, SSL_SECOP_CURVE_SUPPORTED)) { |
0a10825a BE |
229 | #ifndef OPENSSL_NO_TLS1_3 |
230 | int ctmp13 = ssl_group_id_internal_to_tls13(ctmp); | |
231 | ||
232 | if (ctmp13 != 0 && ctmp13 != ctmp | |
233 | && max_version == TLS1_3_VERSION) { | |
234 | if (!WPACKET_put_bytes_u16(pkt, ctmp13)) { | |
235 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
236 | return EXT_RETURN_FAIL; | |
237 | } | |
238 | tls13added++; | |
239 | added++; | |
240 | if (min_version == TLS1_3_VERSION) | |
241 | continue; | |
242 | } | |
243 | #endif | |
9e84a42d | 244 | if (!WPACKET_put_bytes_u16(pkt, ctmp)) { |
c48ffbcc | 245 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
9aaecbfc | 246 | return EXT_RETURN_FAIL; |
247 | } | |
8b1db5d3 MC |
248 | if (okfortls13 && max_version == TLS1_3_VERSION) |
249 | tls13added++; | |
250 | added++; | |
ab83e314 MC |
251 | } |
252 | } | |
253 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
9afc6c54 | 254 | if (added == 0) |
8b1db5d3 MC |
255 | SSLfatal_data(s, SSL_AD_INTERNAL_ERROR, SSL_R_NO_SUITABLE_GROUPS, |
256 | "No groups enabled for max supported SSL/TLS version"); | |
257 | else | |
258 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
b186a592 | 259 | return EXT_RETURN_FAIL; |
9afc6c54 MC |
260 | } |
261 | ||
262 | if (tls13added == 0 && max_version == TLS1_3_VERSION) { | |
263 | SSLfatal_data(s, SSL_AD_INTERNAL_ERROR, SSL_R_NO_SUITABLE_GROUPS, | |
264 | "No groups enabled for max supported SSL/TLS version"); | |
265 | return EXT_RETURN_FAIL; | |
ab83e314 MC |
266 | } |
267 | ||
b186a592 | 268 | return EXT_RETURN_SENT; |
ab83e314 | 269 | } |
ab83e314 | 270 | |
38b051a1 | 271 | EXT_RETURN tls_construct_ctos_session_ticket(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 272 | unsigned int context, X509 *x, |
f63a17d6 | 273 | size_t chainidx) |
ab83e314 MC |
274 | { |
275 | size_t ticklen; | |
276 | ||
277 | if (!tls_use_ticket(s)) | |
b186a592 | 278 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
279 | |
280 | if (!s->new_session && s->session != NULL | |
08191294 MC |
281 | && s->session->ext.tick != NULL |
282 | && s->session->ssl_version != TLS1_3_VERSION) { | |
aff8c126 RS |
283 | ticklen = s->session->ext.ticklen; |
284 | } else if (s->session && s->ext.session_ticket != NULL | |
285 | && s->ext.session_ticket->data != NULL) { | |
286 | ticklen = s->ext.session_ticket->length; | |
287 | s->session->ext.tick = OPENSSL_malloc(ticklen); | |
288 | if (s->session->ext.tick == NULL) { | |
c48ffbcc | 289 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 290 | return EXT_RETURN_FAIL; |
ab83e314 | 291 | } |
aff8c126 RS |
292 | memcpy(s->session->ext.tick, |
293 | s->ext.session_ticket->data, ticklen); | |
294 | s->session->ext.ticklen = ticklen; | |
ab83e314 MC |
295 | } else { |
296 | ticklen = 0; | |
297 | } | |
298 | ||
aff8c126 RS |
299 | if (ticklen == 0 && s->ext.session_ticket != NULL && |
300 | s->ext.session_ticket->data == NULL) | |
b186a592 | 301 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
302 | |
303 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket) | |
aff8c126 | 304 | || !WPACKET_sub_memcpy_u16(pkt, s->session->ext.tick, ticklen)) { |
c48ffbcc | 305 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 306 | return EXT_RETURN_FAIL; |
ab83e314 MC |
307 | } |
308 | ||
b186a592 | 309 | return EXT_RETURN_SENT; |
ab83e314 MC |
310 | } |
311 | ||
38b051a1 | 312 | EXT_RETURN tls_construct_ctos_sig_algs(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 313 | unsigned int context, X509 *x, |
f63a17d6 | 314 | size_t chainidx) |
ab83e314 MC |
315 | { |
316 | size_t salglen; | |
98c792d1 | 317 | const uint16_t *salg; |
ab83e314 MC |
318 | |
319 | if (!SSL_CLIENT_USE_SIGALGS(s)) | |
b186a592 | 320 | return EXT_RETURN_NOT_SENT; |
ab83e314 | 321 | |
a9669ddc | 322 | salglen = tls12_get_psigalgs(s, 1, &salg); |
ab83e314 MC |
323 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signature_algorithms) |
324 | /* Sub-packet for sig-algs extension */ | |
325 | || !WPACKET_start_sub_packet_u16(pkt) | |
326 | /* Sub-packet for the actual list */ | |
327 | || !WPACKET_start_sub_packet_u16(pkt) | |
328 | || !tls12_copy_sigalgs(s, pkt, salg, salglen) | |
329 | || !WPACKET_close(pkt) | |
330 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 331 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 332 | return EXT_RETURN_FAIL; |
ab83e314 MC |
333 | } |
334 | ||
b186a592 | 335 | return EXT_RETURN_SENT; |
ab83e314 MC |
336 | } |
337 | ||
338 | #ifndef OPENSSL_NO_OCSP | |
38b051a1 | 339 | EXT_RETURN tls_construct_ctos_status_request(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 340 | unsigned int context, X509 *x, |
f63a17d6 | 341 | size_t chainidx) |
ab83e314 MC |
342 | { |
343 | int i; | |
344 | ||
e96e0f8e MC |
345 | /* This extension isn't defined for client Certificates */ |
346 | if (x != NULL) | |
b186a592 | 347 | return EXT_RETURN_NOT_SENT; |
e96e0f8e | 348 | |
aff8c126 | 349 | if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) |
b186a592 | 350 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
351 | |
352 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request) | |
353 | /* Sub-packet for status request extension */ | |
354 | || !WPACKET_start_sub_packet_u16(pkt) | |
355 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_STATUSTYPE_ocsp) | |
356 | /* Sub-packet for the ids */ | |
357 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
c48ffbcc | 358 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 359 | return EXT_RETURN_FAIL; |
ab83e314 | 360 | } |
aff8c126 | 361 | for (i = 0; i < sk_OCSP_RESPID_num(s->ext.ocsp.ids); i++) { |
ab83e314 | 362 | unsigned char *idbytes; |
aff8c126 | 363 | OCSP_RESPID *id = sk_OCSP_RESPID_value(s->ext.ocsp.ids, i); |
1266eefd | 364 | int idlen = i2d_OCSP_RESPID(id, NULL); |
ab83e314 | 365 | |
ab83e314 MC |
366 | if (idlen <= 0 |
367 | /* Sub-packet for an individual id */ | |
368 | || !WPACKET_sub_allocate_bytes_u16(pkt, idlen, &idbytes) | |
369 | || i2d_OCSP_RESPID(id, &idbytes) != idlen) { | |
c48ffbcc | 370 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 371 | return EXT_RETURN_FAIL; |
ab83e314 MC |
372 | } |
373 | } | |
374 | if (!WPACKET_close(pkt) | |
375 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
c48ffbcc | 376 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 377 | return EXT_RETURN_FAIL; |
ab83e314 | 378 | } |
aff8c126 | 379 | if (s->ext.ocsp.exts) { |
ab83e314 | 380 | unsigned char *extbytes; |
aff8c126 | 381 | int extlen = i2d_X509_EXTENSIONS(s->ext.ocsp.exts, NULL); |
ab83e314 MC |
382 | |
383 | if (extlen < 0) { | |
c48ffbcc | 384 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 385 | return EXT_RETURN_FAIL; |
ab83e314 MC |
386 | } |
387 | if (!WPACKET_allocate_bytes(pkt, extlen, &extbytes) | |
aff8c126 | 388 | || i2d_X509_EXTENSIONS(s->ext.ocsp.exts, &extbytes) |
ab83e314 | 389 | != extlen) { |
c48ffbcc | 390 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 391 | return EXT_RETURN_FAIL; |
ab83e314 MC |
392 | } |
393 | } | |
394 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
c48ffbcc | 395 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 396 | return EXT_RETURN_FAIL; |
ab83e314 MC |
397 | } |
398 | ||
b186a592 | 399 | return EXT_RETURN_SENT; |
ab83e314 MC |
400 | } |
401 | #endif | |
402 | ||
403 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
38b051a1 TM |
404 | EXT_RETURN tls_construct_ctos_npn(SSL_CONNECTION *s, WPACKET *pkt, |
405 | unsigned int context, | |
f63a17d6 | 406 | X509 *x, size_t chainidx) |
ab83e314 | 407 | { |
38b051a1 TM |
408 | if (SSL_CONNECTION_GET_CTX(s)->ext.npn_select_cb == NULL |
409 | || !SSL_IS_FIRST_HANDSHAKE(s)) | |
b186a592 | 410 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
411 | |
412 | /* | |
413 | * The client advertises an empty extension to indicate its support | |
414 | * for Next Protocol Negotiation | |
415 | */ | |
416 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_next_proto_neg) | |
417 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
c48ffbcc | 418 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 419 | return EXT_RETURN_FAIL; |
ab83e314 MC |
420 | } |
421 | ||
b186a592 | 422 | return EXT_RETURN_SENT; |
ab83e314 MC |
423 | } |
424 | #endif | |
425 | ||
38b051a1 TM |
426 | EXT_RETURN tls_construct_ctos_alpn(SSL_CONNECTION *s, WPACKET *pkt, |
427 | unsigned int context, | |
f63a17d6 | 428 | X509 *x, size_t chainidx) |
ab83e314 | 429 | { |
555cbb32 | 430 | s->s3.alpn_sent = 0; |
ab83e314 | 431 | |
c7f47786 | 432 | if (s->ext.alpn == NULL || !SSL_IS_FIRST_HANDSHAKE(s)) |
b186a592 | 433 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
434 | |
435 | if (!WPACKET_put_bytes_u16(pkt, | |
436 | TLSEXT_TYPE_application_layer_protocol_negotiation) | |
437 | /* Sub-packet ALPN extension */ | |
438 | || !WPACKET_start_sub_packet_u16(pkt) | |
aff8c126 | 439 | || !WPACKET_sub_memcpy_u16(pkt, s->ext.alpn, s->ext.alpn_len) |
ab83e314 | 440 | || !WPACKET_close(pkt)) { |
c48ffbcc | 441 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 442 | return EXT_RETURN_FAIL; |
ab83e314 | 443 | } |
555cbb32 | 444 | s->s3.alpn_sent = 1; |
ab83e314 | 445 | |
b186a592 | 446 | return EXT_RETURN_SENT; |
ab83e314 MC |
447 | } |
448 | ||
449 | ||
450 | #ifndef OPENSSL_NO_SRTP | |
38b051a1 | 451 | EXT_RETURN tls_construct_ctos_use_srtp(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 452 | unsigned int context, X509 *x, |
f63a17d6 | 453 | size_t chainidx) |
ab83e314 | 454 | { |
38b051a1 TM |
455 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
456 | STACK_OF(SRTP_PROTECTION_PROFILE) *clnt = SSL_get_srtp_profiles(ssl); | |
1266eefd | 457 | int i, end; |
ab83e314 MC |
458 | |
459 | if (clnt == NULL) | |
b186a592 | 460 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
461 | |
462 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp) | |
463 | /* Sub-packet for SRTP extension */ | |
464 | || !WPACKET_start_sub_packet_u16(pkt) | |
465 | /* Sub-packet for the protection profile list */ | |
466 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
c48ffbcc | 467 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 468 | return EXT_RETURN_FAIL; |
ab83e314 | 469 | } |
1266eefd MC |
470 | |
471 | end = sk_SRTP_PROTECTION_PROFILE_num(clnt); | |
472 | for (i = 0; i < end; i++) { | |
473 | const SRTP_PROTECTION_PROFILE *prof = | |
474 | sk_SRTP_PROTECTION_PROFILE_value(clnt, i); | |
475 | ||
ab83e314 | 476 | if (prof == NULL || !WPACKET_put_bytes_u16(pkt, prof->id)) { |
c48ffbcc | 477 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 478 | return EXT_RETURN_FAIL; |
ab83e314 MC |
479 | } |
480 | } | |
481 | if (!WPACKET_close(pkt) | |
482 | /* Add an empty use_mki value */ | |
483 | || !WPACKET_put_bytes_u8(pkt, 0) | |
484 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 485 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 486 | return EXT_RETURN_FAIL; |
ab83e314 MC |
487 | } |
488 | ||
b186a592 | 489 | return EXT_RETURN_SENT; |
ab83e314 MC |
490 | } |
491 | #endif | |
492 | ||
38b051a1 TM |
493 | EXT_RETURN tls_construct_ctos_etm(SSL_CONNECTION *s, WPACKET *pkt, |
494 | unsigned int context, | |
f63a17d6 | 495 | X509 *x, size_t chainidx) |
ab83e314 MC |
496 | { |
497 | if (s->options & SSL_OP_NO_ENCRYPT_THEN_MAC) | |
b186a592 | 498 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
499 | |
500 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac) | |
501 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
c48ffbcc | 502 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 503 | return EXT_RETURN_FAIL; |
ab83e314 MC |
504 | } |
505 | ||
b186a592 | 506 | return EXT_RETURN_SENT; |
ab83e314 MC |
507 | } |
508 | ||
509 | #ifndef OPENSSL_NO_CT | |
38b051a1 TM |
510 | EXT_RETURN tls_construct_ctos_sct(SSL_CONNECTION *s, WPACKET *pkt, |
511 | unsigned int context, | |
f63a17d6 | 512 | X509 *x, size_t chainidx) |
ab83e314 MC |
513 | { |
514 | if (s->ct_validation_callback == NULL) | |
b186a592 | 515 | return EXT_RETURN_NOT_SENT; |
ab83e314 | 516 | |
e96e0f8e MC |
517 | /* Not defined for client Certificates */ |
518 | if (x != NULL) | |
b186a592 | 519 | return EXT_RETURN_NOT_SENT; |
e96e0f8e | 520 | |
ab83e314 MC |
521 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signed_certificate_timestamp) |
522 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
c48ffbcc | 523 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 524 | return EXT_RETURN_FAIL; |
ab83e314 MC |
525 | } |
526 | ||
b186a592 | 527 | return EXT_RETURN_SENT; |
ab83e314 MC |
528 | } |
529 | #endif | |
530 | ||
38b051a1 TM |
531 | EXT_RETURN tls_construct_ctos_ems(SSL_CONNECTION *s, WPACKET *pkt, |
532 | unsigned int context, | |
f63a17d6 | 533 | X509 *x, size_t chainidx) |
ab83e314 | 534 | { |
088dfa13 TS |
535 | if (s->options & SSL_OP_NO_EXTENDED_MASTER_SECRET) |
536 | return EXT_RETURN_NOT_SENT; | |
537 | ||
ab83e314 MC |
538 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret) |
539 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
c48ffbcc | 540 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 541 | return EXT_RETURN_FAIL; |
ab83e314 MC |
542 | } |
543 | ||
b186a592 | 544 | return EXT_RETURN_SENT; |
ab83e314 MC |
545 | } |
546 | ||
38b051a1 | 547 | EXT_RETURN tls_construct_ctos_supported_versions(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 548 | unsigned int context, X509 *x, |
f63a17d6 | 549 | size_t chainidx) |
ab83e314 MC |
550 | { |
551 | int currv, min_version, max_version, reason; | |
552 | ||
b5b993b2 | 553 | reason = ssl_get_min_max_version(s, &min_version, &max_version, NULL); |
88050dd1 | 554 | if (reason != 0) { |
c48ffbcc | 555 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, reason); |
88050dd1 MC |
556 | return EXT_RETURN_FAIL; |
557 | } | |
558 | ||
559 | /* | |
560 | * Don't include this if we can't negotiate TLSv1.3. We can do a straight | |
561 | * comparison here because we will never be called in DTLS. | |
562 | */ | |
563 | if (max_version < TLS1_3_VERSION) | |
564 | return EXT_RETURN_NOT_SENT; | |
565 | ||
ab83e314 MC |
566 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_versions) |
567 | || !WPACKET_start_sub_packet_u16(pkt) | |
568 | || !WPACKET_start_sub_packet_u8(pkt)) { | |
c48ffbcc | 569 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 570 | return EXT_RETURN_FAIL; |
ab83e314 MC |
571 | } |
572 | ||
ab83e314 | 573 | for (currv = max_version; currv >= min_version; currv--) { |
35e742ec | 574 | if (!WPACKET_put_bytes_u16(pkt, currv)) { |
c48ffbcc | 575 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 576 | return EXT_RETURN_FAIL; |
ab83e314 MC |
577 | } |
578 | } | |
579 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
c48ffbcc | 580 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 581 | return EXT_RETURN_FAIL; |
ab83e314 MC |
582 | } |
583 | ||
b186a592 | 584 | return EXT_RETURN_SENT; |
ab83e314 MC |
585 | } |
586 | ||
b2f7e8c0 | 587 | /* |
e3c0d76b | 588 | * Construct a psk_kex_modes extension. |
b2f7e8c0 | 589 | */ |
38b051a1 | 590 | EXT_RETURN tls_construct_ctos_psk_kex_modes(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 591 | unsigned int context, X509 *x, |
f63a17d6 | 592 | size_t chainidx) |
b2f7e8c0 MC |
593 | { |
594 | #ifndef OPENSSL_NO_TLS1_3 | |
e3c0d76b MC |
595 | int nodhe = s->options & SSL_OP_ALLOW_NO_DHE_KEX; |
596 | ||
b2f7e8c0 MC |
597 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk_kex_modes) |
598 | || !WPACKET_start_sub_packet_u16(pkt) | |
599 | || !WPACKET_start_sub_packet_u8(pkt) | |
600 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE_DHE) | |
e3c0d76b | 601 | || (nodhe && !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE)) |
b2f7e8c0 MC |
602 | || !WPACKET_close(pkt) |
603 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 604 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 605 | return EXT_RETURN_FAIL; |
b2f7e8c0 | 606 | } |
b3ad72ce | 607 | |
e3c0d76b MC |
608 | s->ext.psk_kex_mode = TLSEXT_KEX_MODE_FLAG_KE_DHE; |
609 | if (nodhe) | |
610 | s->ext.psk_kex_mode |= TLSEXT_KEX_MODE_FLAG_KE; | |
b2f7e8c0 MC |
611 | #endif |
612 | ||
b186a592 | 613 | return EXT_RETURN_SENT; |
b2f7e8c0 MC |
614 | } |
615 | ||
3847d426 | 616 | #ifndef OPENSSL_NO_TLS1_3 |
38b051a1 | 617 | static int add_key_share(SSL_CONNECTION *s, WPACKET *pkt, unsigned int curve_id) |
3847d426 | 618 | { |
7b1ec1cf MC |
619 | unsigned char *encoded_point = NULL; |
620 | EVP_PKEY *key_share_key = NULL; | |
3847d426 MC |
621 | size_t encodedlen; |
622 | ||
555cbb32 | 623 | if (s->s3.tmp.pkey != NULL) { |
fc7129dc | 624 | if (!ossl_assert(s->hello_retry_request == SSL_HRR_PENDING)) { |
c48ffbcc | 625 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
d8028b20 | 626 | return 0; |
7b1ec1cf MC |
627 | } |
628 | /* | |
629 | * Could happen if we got an HRR that wasn't requesting a new key_share | |
630 | */ | |
555cbb32 | 631 | key_share_key = s->s3.tmp.pkey; |
7b1ec1cf | 632 | } else { |
f63a17d6 | 633 | key_share_key = ssl_generate_pkey_group(s, curve_id); |
7b1ec1cf | 634 | if (key_share_key == NULL) { |
f63a17d6 | 635 | /* SSLfatal() already called */ |
d8028b20 | 636 | return 0; |
7b1ec1cf | 637 | } |
3847d426 MC |
638 | } |
639 | ||
640 | /* Encode the public key. */ | |
5ac8fb58 MC |
641 | encodedlen = EVP_PKEY_get1_encoded_public_key(key_share_key, |
642 | &encoded_point); | |
3847d426 | 643 | if (encodedlen == 0) { |
c48ffbcc | 644 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EC_LIB); |
7b1ec1cf | 645 | goto err; |
3847d426 MC |
646 | } |
647 | ||
648 | /* Create KeyShareEntry */ | |
0a10825a | 649 | if (!WPACKET_put_bytes_u16(pkt, ssl_group_id_internal_to_tls13(curve_id)) |
2248dbeb | 650 | || !WPACKET_sub_memcpy_u16(pkt, encoded_point, encodedlen)) { |
c48ffbcc | 651 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
7b1ec1cf | 652 | goto err; |
3847d426 MC |
653 | } |
654 | ||
655 | /* | |
407820c0 | 656 | * When changing to send more than one key_share we're |
3847d426 MC |
657 | * going to need to be able to save more than one EVP_PKEY. For now |
658 | * we reuse the existing tmp.pkey | |
659 | */ | |
555cbb32 TS |
660 | s->s3.tmp.pkey = key_share_key; |
661 | s->s3.group_id = curve_id; | |
2248dbeb | 662 | OPENSSL_free(encoded_point); |
3847d426 | 663 | |
d8028b20 | 664 | return 1; |
7b1ec1cf | 665 | err: |
555cbb32 | 666 | if (s->s3.tmp.pkey == NULL) |
7b1ec1cf MC |
667 | EVP_PKEY_free(key_share_key); |
668 | OPENSSL_free(encoded_point); | |
d8028b20 | 669 | return 0; |
3847d426 MC |
670 | } |
671 | #endif | |
672 | ||
38b051a1 | 673 | EXT_RETURN tls_construct_ctos_key_share(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 674 | unsigned int context, X509 *x, |
f63a17d6 | 675 | size_t chainidx) |
ab83e314 | 676 | { |
3cf96e88 | 677 | #ifndef OPENSSL_NO_TLS1_3 |
f48d826e DSH |
678 | size_t i, num_groups = 0; |
679 | const uint16_t *pgroups = NULL; | |
9e84a42d | 680 | uint16_t curve_id = 0; |
ab83e314 MC |
681 | |
682 | /* key_share extension */ | |
683 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
684 | /* Extension data sub-packet */ | |
685 | || !WPACKET_start_sub_packet_u16(pkt) | |
686 | /* KeyShare list sub-packet */ | |
687 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
c48ffbcc | 688 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 689 | return EXT_RETURN_FAIL; |
ab83e314 MC |
690 | } |
691 | ||
f48d826e | 692 | tls1_get_supported_groups(s, &pgroups, &num_groups); |
ab83e314 MC |
693 | |
694 | /* | |
407820c0 P |
695 | * Make the number of key_shares sent configurable. For |
696 | * now, we just send one | |
ab83e314 | 697 | */ |
555cbb32 TS |
698 | if (s->s3.group_id != 0) { |
699 | curve_id = s->s3.group_id; | |
3847d426 | 700 | } else { |
f48d826e | 701 | for (i = 0; i < num_groups; i++) { |
0a10825a BE |
702 | if (ssl_group_id_internal_to_tls13(pgroups[i]) == 0) |
703 | continue; | |
ab83e314 | 704 | |
dbc6268f | 705 | if (!tls_group_allowed(s, pgroups[i], SSL_SECOP_CURVE_SUPPORTED)) |
3847d426 | 706 | continue; |
ab83e314 | 707 | |
f48d826e | 708 | curve_id = pgroups[i]; |
3847d426 | 709 | break; |
ab83e314 | 710 | } |
3847d426 | 711 | } |
ab83e314 | 712 | |
3847d426 | 713 | if (curve_id == 0) { |
c48ffbcc | 714 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_NO_SUITABLE_KEY_SHARE); |
b186a592 | 715 | return EXT_RETURN_FAIL; |
ab83e314 MC |
716 | } |
717 | ||
f63a17d6 MC |
718 | if (!add_key_share(s, pkt, curve_id)) { |
719 | /* SSLfatal() already called */ | |
b186a592 | 720 | return EXT_RETURN_FAIL; |
f63a17d6 | 721 | } |
3847d426 | 722 | |
ab83e314 | 723 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { |
c48ffbcc | 724 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 725 | return EXT_RETURN_FAIL; |
ab83e314 | 726 | } |
b186a592 | 727 | return EXT_RETURN_SENT; |
aa2ed504 TS |
728 | #else |
729 | return EXT_RETURN_NOT_SENT; | |
730 | #endif | |
ab83e314 MC |
731 | } |
732 | ||
38b051a1 TM |
733 | EXT_RETURN tls_construct_ctos_cookie(SSL_CONNECTION *s, WPACKET *pkt, |
734 | unsigned int context, | |
f63a17d6 | 735 | X509 *x, size_t chainidx) |
cfef5027 | 736 | { |
b186a592 | 737 | EXT_RETURN ret = EXT_RETURN_FAIL; |
cfef5027 MC |
738 | |
739 | /* Should only be set if we've had an HRR */ | |
740 | if (s->ext.tls13_cookie_len == 0) | |
b186a592 | 741 | return EXT_RETURN_NOT_SENT; |
cfef5027 MC |
742 | |
743 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_cookie) | |
744 | /* Extension data sub-packet */ | |
745 | || !WPACKET_start_sub_packet_u16(pkt) | |
746 | || !WPACKET_sub_memcpy_u16(pkt, s->ext.tls13_cookie, | |
747 | s->ext.tls13_cookie_len) | |
748 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 749 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
cfef5027 MC |
750 | goto end; |
751 | } | |
752 | ||
b186a592 | 753 | ret = EXT_RETURN_SENT; |
cfef5027 MC |
754 | end: |
755 | OPENSSL_free(s->ext.tls13_cookie); | |
febb0afa | 756 | s->ext.tls13_cookie = NULL; |
cfef5027 MC |
757 | s->ext.tls13_cookie_len = 0; |
758 | ||
759 | return ret; | |
760 | } | |
761 | ||
38b051a1 | 762 | EXT_RETURN tls_construct_ctos_early_data(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 763 | unsigned int context, X509 *x, |
f63a17d6 | 764 | size_t chainidx) |
38df5a45 | 765 | { |
696de86f PW |
766 | #ifndef OPENSSL_NO_PSK |
767 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
768 | #endif /* OPENSSL_NO_PSK */ | |
ccb76685 | 769 | const unsigned char *id = NULL; |
fff202e5 | 770 | size_t idlen = 0; |
add8d0e9 | 771 | SSL_SESSION *psksess = NULL; |
ffc5bbaa | 772 | SSL_SESSION *edsess = NULL; |
add8d0e9 | 773 | const EVP_MD *handmd = NULL; |
38b051a1 | 774 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
add8d0e9 | 775 | |
fc7129dc | 776 | if (s->hello_retry_request == SSL_HRR_PENDING) |
add8d0e9 MC |
777 | handmd = ssl_handshake_md(s); |
778 | ||
779 | if (s->psk_use_session_cb != NULL | |
38b051a1 | 780 | && (!s->psk_use_session_cb(ssl, handmd, &id, &idlen, &psksess) |
ffc5bbaa MC |
781 | || (psksess != NULL |
782 | && psksess->ssl_version != TLS1_3_VERSION))) { | |
783 | SSL_SESSION_free(psksess); | |
c48ffbcc | 784 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_PSK); |
add8d0e9 MC |
785 | return EXT_RETURN_FAIL; |
786 | } | |
787 | ||
c2b290c3 | 788 | #ifndef OPENSSL_NO_PSK |
f3d40db1 MC |
789 | if (psksess == NULL && s->psk_client_callback != NULL) { |
790 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
791 | size_t psklen = 0; | |
792 | ||
793 | memset(identity, 0, sizeof(identity)); | |
38b051a1 TM |
794 | psklen = s->psk_client_callback(ssl, NULL, |
795 | identity, sizeof(identity) - 1, | |
f3d40db1 MC |
796 | psk, sizeof(psk)); |
797 | ||
798 | if (psklen > PSK_MAX_PSK_LEN) { | |
c48ffbcc | 799 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
800 | return EXT_RETURN_FAIL; |
801 | } else if (psklen > 0) { | |
802 | const unsigned char tls13_aes128gcmsha256_id[] = { 0x13, 0x01 }; | |
803 | const SSL_CIPHER *cipher; | |
804 | ||
805 | idlen = strlen(identity); | |
806 | if (idlen > PSK_MAX_IDENTITY_LEN) { | |
c48ffbcc | 807 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
808 | return EXT_RETURN_FAIL; |
809 | } | |
810 | id = (unsigned char *)identity; | |
811 | ||
812 | /* | |
813 | * We found a PSK using an old style callback. We don't know | |
814 | * the digest so we default to SHA256 as per the TLSv1.3 spec | |
815 | */ | |
38b051a1 | 816 | cipher = SSL_CIPHER_find(ssl, tls13_aes128gcmsha256_id); |
f3d40db1 | 817 | if (cipher == NULL) { |
c48ffbcc | 818 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
819 | return EXT_RETURN_FAIL; |
820 | } | |
821 | ||
822 | psksess = SSL_SESSION_new(); | |
823 | if (psksess == NULL | |
824 | || !SSL_SESSION_set1_master_key(psksess, psk, psklen) | |
825 | || !SSL_SESSION_set_cipher(psksess, cipher) | |
826 | || !SSL_SESSION_set_protocol_version(psksess, TLS1_3_VERSION)) { | |
c48ffbcc | 827 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
828 | OPENSSL_cleanse(psk, psklen); |
829 | return EXT_RETURN_FAIL; | |
830 | } | |
831 | OPENSSL_cleanse(psk, psklen); | |
832 | } | |
833 | } | |
c2b290c3 | 834 | #endif /* OPENSSL_NO_PSK */ |
f3d40db1 | 835 | |
add8d0e9 MC |
836 | SSL_SESSION_free(s->psksession); |
837 | s->psksession = psksess; | |
838 | if (psksess != NULL) { | |
839 | OPENSSL_free(s->psksession_id); | |
840 | s->psksession_id = OPENSSL_memdup(id, idlen); | |
841 | if (s->psksession_id == NULL) { | |
39a14059 | 842 | s->psksession_id_len = 0; |
c48ffbcc | 843 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
add8d0e9 MC |
844 | return EXT_RETURN_FAIL; |
845 | } | |
846 | s->psksession_id_len = idlen; | |
847 | } | |
848 | ||
38df5a45 | 849 | if (s->early_data_state != SSL_EARLY_DATA_CONNECTING |
add8d0e9 MC |
850 | || (s->session->ext.max_early_data == 0 |
851 | && (psksess == NULL || psksess->ext.max_early_data == 0))) { | |
38df5a45 | 852 | s->max_early_data = 0; |
b186a592 | 853 | return EXT_RETURN_NOT_SENT; |
38df5a45 | 854 | } |
ffc5bbaa MC |
855 | edsess = s->session->ext.max_early_data != 0 ? s->session : psksess; |
856 | s->max_early_data = edsess->ext.max_early_data; | |
857 | ||
bfab12bb MC |
858 | if (edsess->ext.hostname != NULL) { |
859 | if (s->ext.hostname == NULL | |
860 | || (s->ext.hostname != NULL | |
861 | && strcmp(s->ext.hostname, edsess->ext.hostname) != 0)) { | |
f63a17d6 | 862 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
f63a17d6 | 863 | SSL_R_INCONSISTENT_EARLY_DATA_SNI); |
bfab12bb MC |
864 | return EXT_RETURN_FAIL; |
865 | } | |
ffc5bbaa MC |
866 | } |
867 | ||
868 | if ((s->ext.alpn == NULL && edsess->ext.alpn_selected != NULL)) { | |
c48ffbcc | 869 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_INCONSISTENT_EARLY_DATA_ALPN); |
ffc5bbaa MC |
870 | return EXT_RETURN_FAIL; |
871 | } | |
872 | ||
873 | /* | |
874 | * Verify that we are offering an ALPN protocol consistent with the early | |
875 | * data. | |
876 | */ | |
877 | if (edsess->ext.alpn_selected != NULL) { | |
878 | PACKET prots, alpnpkt; | |
879 | int found = 0; | |
880 | ||
881 | if (!PACKET_buf_init(&prots, s->ext.alpn, s->ext.alpn_len)) { | |
c48ffbcc | 882 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
ffc5bbaa MC |
883 | return EXT_RETURN_FAIL; |
884 | } | |
885 | while (PACKET_get_length_prefixed_1(&prots, &alpnpkt)) { | |
886 | if (PACKET_equal(&alpnpkt, edsess->ext.alpn_selected, | |
887 | edsess->ext.alpn_selected_len)) { | |
888 | found = 1; | |
889 | break; | |
890 | } | |
891 | } | |
892 | if (!found) { | |
f63a17d6 | 893 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
f63a17d6 | 894 | SSL_R_INCONSISTENT_EARLY_DATA_ALPN); |
ffc5bbaa MC |
895 | return EXT_RETURN_FAIL; |
896 | } | |
897 | } | |
38df5a45 MC |
898 | |
899 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) | |
900 | || !WPACKET_start_sub_packet_u16(pkt) | |
901 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 902 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 903 | return EXT_RETURN_FAIL; |
38df5a45 MC |
904 | } |
905 | ||
906 | /* | |
907 | * We set this to rejected here. Later, if the server acknowledges the | |
908 | * extension, we set it to accepted. | |
909 | */ | |
910 | s->ext.early_data = SSL_EARLY_DATA_REJECTED; | |
4be3a7c7 | 911 | s->ext.early_data_ok = 1; |
38df5a45 | 912 | |
b186a592 | 913 | return EXT_RETURN_SENT; |
38df5a45 MC |
914 | } |
915 | ||
1266eefd MC |
916 | #define F5_WORKAROUND_MIN_MSG_LEN 0xff |
917 | #define F5_WORKAROUND_MAX_MSG_LEN 0x200 | |
918 | ||
d702ad12 MC |
919 | /* |
920 | * PSK pre binder overhead = | |
921 | * 2 bytes for TLSEXT_TYPE_psk | |
922 | * 2 bytes for extension length | |
923 | * 2 bytes for identities list length | |
924 | * 2 bytes for identity length | |
925 | * 4 bytes for obfuscated_ticket_age | |
926 | * 2 bytes for binder list length | |
927 | * 1 byte for binder length | |
928 | * The above excludes the number of bytes for the identity itself and the | |
929 | * subsequent binder bytes | |
930 | */ | |
931 | #define PSK_PRE_BINDER_OVERHEAD (2 + 2 + 2 + 2 + 4 + 2 + 1) | |
932 | ||
38b051a1 | 933 | EXT_RETURN tls_construct_ctos_padding(SSL_CONNECTION *s, WPACKET *pkt, |
b186a592 | 934 | unsigned int context, X509 *x, |
f63a17d6 | 935 | size_t chainidx) |
ab83e314 MC |
936 | { |
937 | unsigned char *padbytes; | |
938 | size_t hlen; | |
939 | ||
940 | if ((s->options & SSL_OP_TLSEXT_PADDING) == 0) | |
b186a592 | 941 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
942 | |
943 | /* | |
d702ad12 MC |
944 | * Add padding to workaround bugs in F5 terminators. See RFC7685. |
945 | * This code calculates the length of all extensions added so far but | |
946 | * excludes the PSK extension (because that MUST be written last). Therefore | |
947 | * this extension MUST always appear second to last. | |
ab83e314 MC |
948 | */ |
949 | if (!WPACKET_get_total_written(pkt, &hlen)) { | |
c48ffbcc | 950 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 951 | return EXT_RETURN_FAIL; |
ab83e314 MC |
952 | } |
953 | ||
d702ad12 MC |
954 | /* |
955 | * If we're going to send a PSK then that will be written out after this | |
956 | * extension, so we need to calculate how long it is going to be. | |
957 | */ | |
958 | if (s->session->ssl_version == TLS1_3_VERSION | |
959 | && s->session->ext.ticklen != 0 | |
960 | && s->session->cipher != NULL) { | |
38b051a1 TM |
961 | const EVP_MD *md = ssl_md(SSL_CONNECTION_GET_CTX(s), |
962 | s->session->cipher->algorithm2); | |
d702ad12 MC |
963 | |
964 | if (md != NULL) { | |
965 | /* | |
966 | * Add the fixed PSK overhead, the identity length and the binder | |
967 | * length. | |
968 | */ | |
969 | hlen += PSK_PRE_BINDER_OVERHEAD + s->session->ext.ticklen | |
ed576acd | 970 | + EVP_MD_get_size(md); |
d702ad12 MC |
971 | } |
972 | } | |
973 | ||
1266eefd | 974 | if (hlen > F5_WORKAROUND_MIN_MSG_LEN && hlen < F5_WORKAROUND_MAX_MSG_LEN) { |
1ee4b98e | 975 | /* Calculate the amount of padding we need to add */ |
1266eefd MC |
976 | hlen = F5_WORKAROUND_MAX_MSG_LEN - hlen; |
977 | ||
978 | /* | |
979 | * Take off the size of extension header itself (2 bytes for type and | |
10ed1b72 TS |
980 | * 2 bytes for length bytes), but ensure that the extension is at least |
981 | * 1 byte long so as not to have an empty extension last (WebSphere 7.x, | |
982 | * 8.x are intolerant of that condition) | |
1266eefd | 983 | */ |
3d85c7f4 | 984 | if (hlen > 4) |
ab83e314 MC |
985 | hlen -= 4; |
986 | else | |
10ed1b72 | 987 | hlen = 1; |
ab83e314 MC |
988 | |
989 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_padding) | |
990 | || !WPACKET_sub_allocate_bytes_u16(pkt, hlen, &padbytes)) { | |
c48ffbcc | 991 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
eb5fd03b | 992 | return EXT_RETURN_FAIL; |
ab83e314 MC |
993 | } |
994 | memset(padbytes, 0, hlen); | |
995 | } | |
996 | ||
b186a592 | 997 | return EXT_RETURN_SENT; |
ab83e314 MC |
998 | } |
999 | ||
ec15acb6 MC |
1000 | /* |
1001 | * Construct the pre_shared_key extension | |
1002 | */ | |
38b051a1 TM |
1003 | EXT_RETURN tls_construct_ctos_psk(SSL_CONNECTION *s, WPACKET *pkt, |
1004 | unsigned int context, | |
f63a17d6 | 1005 | X509 *x, size_t chainidx) |
ec15acb6 MC |
1006 | { |
1007 | #ifndef OPENSSL_NO_TLS1_3 | |
15b1688a | 1008 | uint32_t now, agesec, agems = 0; |
add8d0e9 | 1009 | size_t reshashsize = 0, pskhashsize = 0, binderoffset, msglen; |
9368f865 | 1010 | unsigned char *resbinder = NULL, *pskbinder = NULL, *msgstart = NULL; |
15b1688a | 1011 | const EVP_MD *handmd = NULL, *mdres = NULL, *mdpsk = NULL; |
9368f865 | 1012 | int dores = 0; |
38b051a1 | 1013 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
ec15acb6 | 1014 | |
c96ce52c | 1015 | s->ext.tick_identity = 0; |
ec15acb6 | 1016 | |
d702ad12 MC |
1017 | /* |
1018 | * Note: At this stage of the code we only support adding a single | |
1019 | * resumption PSK. If we add support for multiple PSKs then the length | |
1020 | * calculations in the padding extension will need to be adjusted. | |
1021 | */ | |
1022 | ||
ec15acb6 | 1023 | /* |
08191294 MC |
1024 | * If this is an incompatible or new session then we have nothing to resume |
1025 | * so don't add this extension. | |
ec15acb6 | 1026 | */ |
08191294 | 1027 | if (s->session->ssl_version != TLS1_3_VERSION |
add8d0e9 | 1028 | || (s->session->ext.ticklen == 0 && s->psksession == NULL)) |
b186a592 | 1029 | return EXT_RETURN_NOT_SENT; |
ec15acb6 | 1030 | |
fc7129dc | 1031 | if (s->hello_retry_request == SSL_HRR_PENDING) |
9368f865 MC |
1032 | handmd = ssl_handshake_md(s); |
1033 | ||
9368f865 | 1034 | if (s->session->ext.ticklen != 0) { |
72257204 | 1035 | /* Get the digest associated with the ciphersuite in the session */ |
9368f865 | 1036 | if (s->session->cipher == NULL) { |
c48ffbcc | 1037 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
635c8f77 | 1038 | return EXT_RETURN_FAIL; |
9368f865 | 1039 | } |
38b051a1 | 1040 | mdres = ssl_md(sctx, s->session->cipher->algorithm2); |
9368f865 | 1041 | if (mdres == NULL) { |
72257204 MC |
1042 | /* |
1043 | * Don't recognize this cipher so we can't use the session. | |
1044 | * Ignore it | |
1045 | */ | |
9368f865 MC |
1046 | goto dopsksess; |
1047 | } | |
1048 | ||
fc7129dc | 1049 | if (s->hello_retry_request == SSL_HRR_PENDING && mdres != handmd) { |
9368f865 | 1050 | /* |
72257204 MC |
1051 | * Selected ciphersuite hash does not match the hash for the session |
1052 | * so we can't use it. | |
9368f865 MC |
1053 | */ |
1054 | goto dopsksess; | |
1055 | } | |
1f5b44e9 | 1056 | |
cf3e221b | 1057 | /* |
9368f865 | 1058 | * Technically the C standard just says time() returns a time_t and says |
72257204 MC |
1059 | * nothing about the encoding of that type. In practice most |
1060 | * implementations follow POSIX which holds it as an integral type in | |
1061 | * seconds since epoch. We've already made the assumption that we can do | |
1062 | * this in multiple places in the code, so portability shouldn't be an | |
1063 | * issue. | |
cf3e221b | 1064 | */ |
9368f865 MC |
1065 | now = (uint32_t)time(NULL); |
1066 | agesec = now - (uint32_t)s->session->time; | |
7e70213f MC |
1067 | /* |
1068 | * We calculate the age in seconds but the server may work in ms. Due to | |
1069 | * rounding errors we could overestimate the age by up to 1s. It is | |
1070 | * better to underestimate it. Otherwise, if the RTT is very short, when | |
1071 | * the server calculates the age reported by the client it could be | |
1072 | * bigger than the age calculated on the server - which should never | |
1073 | * happen. | |
1074 | */ | |
1075 | if (agesec > 0) | |
1076 | agesec--; | |
cf3e221b | 1077 | |
9368f865 MC |
1078 | if (s->session->ext.tick_lifetime_hint < agesec) { |
1079 | /* Ticket is too old. Ignore it. */ | |
1080 | goto dopsksess; | |
1081 | } | |
ec15acb6 | 1082 | |
9368f865 MC |
1083 | /* |
1084 | * Calculate age in ms. We're just doing it to nearest second. Should be | |
1085 | * good enough. | |
1086 | */ | |
1087 | agems = agesec * (uint32_t)1000; | |
fc24f0bf | 1088 | |
9368f865 MC |
1089 | if (agesec != 0 && agems / (uint32_t)1000 != agesec) { |
1090 | /* | |
72257204 MC |
1091 | * Overflow. Shouldn't happen unless this is a *really* old session. |
1092 | * If so we just ignore it. | |
9368f865 MC |
1093 | */ |
1094 | goto dopsksess; | |
1095 | } | |
ec15acb6 | 1096 | |
ec15acb6 | 1097 | /* |
72257204 MC |
1098 | * Obfuscate the age. Overflow here is fine, this addition is supposed |
1099 | * to be mod 2^32. | |
ec15acb6 | 1100 | */ |
9368f865 MC |
1101 | agems += s->session->ext.tick_age_add; |
1102 | ||
ed576acd | 1103 | reshashsize = EVP_MD_get_size(mdres); |
c96ce52c | 1104 | s->ext.tick_identity++; |
9368f865 | 1105 | dores = 1; |
ec15acb6 MC |
1106 | } |
1107 | ||
9368f865 | 1108 | dopsksess: |
add8d0e9 | 1109 | if (!dores && s->psksession == NULL) |
9368f865 | 1110 | return EXT_RETURN_NOT_SENT; |
ec15acb6 | 1111 | |
add8d0e9 | 1112 | if (s->psksession != NULL) { |
38b051a1 | 1113 | mdpsk = ssl_md(sctx, s->psksession->cipher->algorithm2); |
9368f865 MC |
1114 | if (mdpsk == NULL) { |
1115 | /* | |
1116 | * Don't recognize this cipher so we can't use the session. | |
1117 | * If this happens it's an application bug. | |
1118 | */ | |
c48ffbcc | 1119 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_PSK); |
635c8f77 | 1120 | return EXT_RETURN_FAIL; |
9368f865 MC |
1121 | } |
1122 | ||
fc7129dc | 1123 | if (s->hello_retry_request == SSL_HRR_PENDING && mdpsk != handmd) { |
9368f865 MC |
1124 | /* |
1125 | * Selected ciphersuite hash does not match the hash for the PSK | |
1126 | * session. This is an application bug. | |
1127 | */ | |
c48ffbcc | 1128 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_PSK); |
635c8f77 | 1129 | return EXT_RETURN_FAIL; |
9368f865 MC |
1130 | } |
1131 | ||
ed576acd | 1132 | pskhashsize = EVP_MD_get_size(mdpsk); |
9368f865 | 1133 | } |
ec15acb6 MC |
1134 | |
1135 | /* Create the extension, but skip over the binder for now */ | |
1136 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk) | |
1137 | || !WPACKET_start_sub_packet_u16(pkt) | |
9368f865 | 1138 | || !WPACKET_start_sub_packet_u16(pkt)) { |
c48ffbcc | 1139 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
635c8f77 | 1140 | return EXT_RETURN_FAIL; |
9368f865 MC |
1141 | } |
1142 | ||
1143 | if (dores) { | |
1144 | if (!WPACKET_sub_memcpy_u16(pkt, s->session->ext.tick, | |
1145 | s->session->ext.ticklen) | |
1146 | || !WPACKET_put_bytes_u32(pkt, agems)) { | |
c48ffbcc | 1147 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
635c8f77 | 1148 | return EXT_RETURN_FAIL; |
9368f865 MC |
1149 | } |
1150 | } | |
1151 | ||
add8d0e9 MC |
1152 | if (s->psksession != NULL) { |
1153 | if (!WPACKET_sub_memcpy_u16(pkt, s->psksession_id, | |
1154 | s->psksession_id_len) | |
9368f865 | 1155 | || !WPACKET_put_bytes_u32(pkt, 0)) { |
c48ffbcc | 1156 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
635c8f77 | 1157 | return EXT_RETURN_FAIL; |
9368f865 | 1158 | } |
c96ce52c | 1159 | s->ext.tick_identity++; |
9368f865 MC |
1160 | } |
1161 | ||
1162 | if (!WPACKET_close(pkt) | |
ec15acb6 MC |
1163 | || !WPACKET_get_total_written(pkt, &binderoffset) |
1164 | || !WPACKET_start_sub_packet_u16(pkt) | |
9368f865 MC |
1165 | || (dores |
1166 | && !WPACKET_sub_allocate_bytes_u8(pkt, reshashsize, &resbinder)) | |
add8d0e9 | 1167 | || (s->psksession != NULL |
9368f865 | 1168 | && !WPACKET_sub_allocate_bytes_u8(pkt, pskhashsize, &pskbinder)) |
ec15acb6 MC |
1169 | || !WPACKET_close(pkt) |
1170 | || !WPACKET_close(pkt) | |
1171 | || !WPACKET_get_total_written(pkt, &msglen) | |
1172 | /* | |
1173 | * We need to fill in all the sub-packet lengths now so we can | |
1174 | * calculate the HMAC of the message up to the binders | |
1175 | */ | |
1176 | || !WPACKET_fill_lengths(pkt)) { | |
c48ffbcc | 1177 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
635c8f77 | 1178 | return EXT_RETURN_FAIL; |
ec15acb6 MC |
1179 | } |
1180 | ||
1181 | msgstart = WPACKET_get_curr(pkt) - msglen; | |
1182 | ||
72257204 MC |
1183 | if (dores |
1184 | && tls_psk_do_binder(s, mdres, msgstart, binderoffset, NULL, | |
1185 | resbinder, s->session, 1, 0) != 1) { | |
635c8f77 MC |
1186 | /* SSLfatal() already called */ |
1187 | return EXT_RETURN_FAIL; | |
ec15acb6 MC |
1188 | } |
1189 | ||
add8d0e9 | 1190 | if (s->psksession != NULL |
72257204 | 1191 | && tls_psk_do_binder(s, mdpsk, msgstart, binderoffset, NULL, |
add8d0e9 | 1192 | pskbinder, s->psksession, 1, 1) != 1) { |
635c8f77 MC |
1193 | /* SSLfatal() already called */ |
1194 | return EXT_RETURN_FAIL; | |
9368f865 MC |
1195 | } |
1196 | ||
635c8f77 | 1197 | return EXT_RETURN_SENT; |
ec15acb6 | 1198 | #else |
89bc9cf6 | 1199 | return EXT_RETURN_NOT_SENT; |
ec15acb6 MC |
1200 | #endif |
1201 | } | |
1202 | ||
38b051a1 | 1203 | EXT_RETURN tls_construct_ctos_post_handshake_auth(SSL_CONNECTION *s, WPACKET *pkt, |
a7e6a3d8 P |
1204 | ossl_unused unsigned int context, |
1205 | ossl_unused X509 *x, | |
1206 | ossl_unused size_t chainidx) | |
9d75dce3 TS |
1207 | { |
1208 | #ifndef OPENSSL_NO_TLS1_3 | |
32097b33 MC |
1209 | if (!s->pha_enabled) |
1210 | return EXT_RETURN_NOT_SENT; | |
9d75dce3 TS |
1211 | |
1212 | /* construct extension - 0 length, no contents */ | |
1213 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_post_handshake_auth) | |
1214 | || !WPACKET_start_sub_packet_u16(pkt) | |
1215 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1216 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
9d75dce3 TS |
1217 | return EXT_RETURN_FAIL; |
1218 | } | |
1219 | ||
1220 | s->post_handshake_auth = SSL_PHA_EXT_SENT; | |
1221 | ||
1222 | return EXT_RETURN_SENT; | |
1223 | #else | |
1224 | return EXT_RETURN_NOT_SENT; | |
1225 | #endif | |
1226 | } | |
1227 | ||
1228 | ||
6dd083fd MC |
1229 | /* |
1230 | * Parse the server's renegotiation binding and abort if it's not right | |
1231 | */ | |
38b051a1 TM |
1232 | int tls_parse_stoc_renegotiate(SSL_CONNECTION *s, PACKET *pkt, |
1233 | unsigned int context, | |
f63a17d6 | 1234 | X509 *x, size_t chainidx) |
6dd083fd | 1235 | { |
555cbb32 TS |
1236 | size_t expected_len = s->s3.previous_client_finished_len |
1237 | + s->s3.previous_server_finished_len; | |
6dd083fd MC |
1238 | size_t ilen; |
1239 | const unsigned char *data; | |
1240 | ||
1241 | /* Check for logic errors */ | |
b77f3ed1 | 1242 | if (!ossl_assert(expected_len == 0 |
555cbb32 | 1243 | || s->s3.previous_client_finished_len != 0) |
b77f3ed1 | 1244 | || !ossl_assert(expected_len == 0 |
555cbb32 | 1245 | || s->s3.previous_server_finished_len != 0)) { |
c48ffbcc | 1246 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b77f3ed1 MC |
1247 | return 0; |
1248 | } | |
6dd083fd MC |
1249 | |
1250 | /* Parse the length byte */ | |
1251 | if (!PACKET_get_1_len(pkt, &ilen)) { | |
c48ffbcc | 1252 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_RENEGOTIATION_ENCODING_ERR); |
6dd083fd MC |
1253 | return 0; |
1254 | } | |
1255 | ||
1256 | /* Consistency check */ | |
1257 | if (PACKET_remaining(pkt) != ilen) { | |
c48ffbcc | 1258 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_RENEGOTIATION_ENCODING_ERR); |
6dd083fd MC |
1259 | return 0; |
1260 | } | |
1261 | ||
1262 | /* Check that the extension matches */ | |
1263 | if (ilen != expected_len) { | |
c48ffbcc | 1264 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_RENEGOTIATION_MISMATCH); |
6dd083fd MC |
1265 | return 0; |
1266 | } | |
1267 | ||
555cbb32 TS |
1268 | if (!PACKET_get_bytes(pkt, &data, s->s3.previous_client_finished_len) |
1269 | || memcmp(data, s->s3.previous_client_finished, | |
1270 | s->s3.previous_client_finished_len) != 0) { | |
c48ffbcc | 1271 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_RENEGOTIATION_MISMATCH); |
6dd083fd MC |
1272 | return 0; |
1273 | } | |
1274 | ||
555cbb32 TS |
1275 | if (!PACKET_get_bytes(pkt, &data, s->s3.previous_server_finished_len) |
1276 | || memcmp(data, s->s3.previous_server_finished, | |
1277 | s->s3.previous_server_finished_len) != 0) { | |
c48ffbcc | 1278 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_RENEGOTIATION_MISMATCH); |
6dd083fd MC |
1279 | return 0; |
1280 | } | |
555cbb32 | 1281 | s->s3.send_connection_binding = 1; |
6dd083fd MC |
1282 | |
1283 | return 1; | |
1284 | } | |
1285 | ||
cf72c757 | 1286 | /* Parse the server's max fragment len extension packet */ |
38b051a1 TM |
1287 | int tls_parse_stoc_maxfragmentlen(SSL_CONNECTION *s, PACKET *pkt, |
1288 | unsigned int context, | |
f63a17d6 | 1289 | X509 *x, size_t chainidx) |
cf72c757 F |
1290 | { |
1291 | unsigned int value; | |
1292 | ||
1293 | if (PACKET_remaining(pkt) != 1 || !PACKET_get_1(pkt, &value)) { | |
c48ffbcc | 1294 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
cf72c757 F |
1295 | return 0; |
1296 | } | |
1297 | ||
1298 | /* |value| should contains a valid max-fragment-length code. */ | |
1299 | if (!IS_MAX_FRAGMENT_LENGTH_EXT_VALID(value)) { | |
f63a17d6 | 1300 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 | 1301 | SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); |
cf72c757 F |
1302 | return 0; |
1303 | } | |
1304 | ||
1305 | /* Must be the same value as client-configured one who was sent to server */ | |
1306 | /*- | |
1307 | * RFC 6066: if a client receives a maximum fragment length negotiation | |
1308 | * response that differs from the length it requested, ... | |
1309 | * It must abort with SSL_AD_ILLEGAL_PARAMETER alert | |
1310 | */ | |
1311 | if (value != s->ext.max_fragment_len_mode) { | |
f63a17d6 | 1312 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 | 1313 | SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); |
cf72c757 F |
1314 | return 0; |
1315 | } | |
1316 | ||
1317 | /* | |
1318 | * Maximum Fragment Length Negotiation succeeded. | |
1319 | * The negotiated Maximum Fragment Length is binding now. | |
1320 | */ | |
1321 | s->session->ext.max_fragment_len_mode = value; | |
1322 | ||
1323 | return 1; | |
1324 | } | |
1325 | ||
38b051a1 TM |
1326 | int tls_parse_stoc_server_name(SSL_CONNECTION *s, PACKET *pkt, |
1327 | unsigned int context, | |
f63a17d6 | 1328 | X509 *x, size_t chainidx) |
6dd083fd | 1329 | { |
fb34a0f4 | 1330 | if (s->ext.hostname == NULL) { |
c48ffbcc | 1331 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
fb34a0f4 MC |
1332 | return 0; |
1333 | } | |
1334 | ||
1335 | if (PACKET_remaining(pkt) > 0) { | |
c48ffbcc | 1336 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
6dd083fd MC |
1337 | return 0; |
1338 | } | |
1339 | ||
1340 | if (!s->hit) { | |
aff8c126 | 1341 | if (s->session->ext.hostname != NULL) { |
c48ffbcc | 1342 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1343 | return 0; |
1344 | } | |
aff8c126 RS |
1345 | s->session->ext.hostname = OPENSSL_strdup(s->ext.hostname); |
1346 | if (s->session->ext.hostname == NULL) { | |
c48ffbcc | 1347 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1348 | return 0; |
1349 | } | |
1350 | } | |
1351 | ||
1352 | return 1; | |
1353 | } | |
1354 | ||
38b051a1 TM |
1355 | int tls_parse_stoc_ec_pt_formats(SSL_CONNECTION *s, PACKET *pkt, |
1356 | unsigned int context, | |
f63a17d6 | 1357 | X509 *x, size_t chainidx) |
6dd083fd | 1358 | { |
848a950b | 1359 | size_t ecpointformats_len; |
6dd083fd MC |
1360 | PACKET ecptformatlist; |
1361 | ||
1362 | if (!PACKET_as_length_prefixed_1(pkt, &ecptformatlist)) { | |
c48ffbcc | 1363 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
6dd083fd MC |
1364 | return 0; |
1365 | } | |
1366 | if (!s->hit) { | |
aff8c126 | 1367 | ecpointformats_len = PACKET_remaining(&ecptformatlist); |
848a950b | 1368 | if (ecpointformats_len == 0) { |
c48ffbcc | 1369 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_LENGTH); |
848a950b MC |
1370 | return 0; |
1371 | } | |
6dd083fd | 1372 | |
cd0fb43c MC |
1373 | s->ext.peer_ecpointformats_len = 0; |
1374 | OPENSSL_free(s->ext.peer_ecpointformats); | |
1375 | s->ext.peer_ecpointformats = OPENSSL_malloc(ecpointformats_len); | |
1376 | if (s->ext.peer_ecpointformats == NULL) { | |
39a14059 | 1377 | s->ext.peer_ecpointformats_len = 0; |
c48ffbcc | 1378 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1379 | return 0; |
1380 | } | |
1381 | ||
cd0fb43c | 1382 | s->ext.peer_ecpointformats_len = ecpointformats_len; |
6dd083fd MC |
1383 | |
1384 | if (!PACKET_copy_bytes(&ecptformatlist, | |
cd0fb43c | 1385 | s->ext.peer_ecpointformats, |
aff8c126 | 1386 | ecpointformats_len)) { |
c48ffbcc | 1387 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1388 | return 0; |
1389 | } | |
1390 | } | |
1391 | ||
1392 | return 1; | |
1393 | } | |
6dd083fd | 1394 | |
38b051a1 TM |
1395 | int tls_parse_stoc_session_ticket(SSL_CONNECTION *s, PACKET *pkt, |
1396 | unsigned int context, | |
f63a17d6 | 1397 | X509 *x, size_t chainidx) |
6dd083fd | 1398 | { |
38b051a1 TM |
1399 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
1400 | ||
aff8c126 | 1401 | if (s->ext.session_ticket_cb != NULL && |
38b051a1 TM |
1402 | !s->ext.session_ticket_cb(ssl, PACKET_data(pkt), |
1403 | PACKET_remaining(pkt), | |
1404 | s->ext.session_ticket_cb_arg)) { | |
c48ffbcc | 1405 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_BAD_EXTENSION); |
6dd083fd MC |
1406 | return 0; |
1407 | } | |
1266eefd | 1408 | |
fb34a0f4 | 1409 | if (!tls_use_ticket(s)) { |
c48ffbcc | 1410 | SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION, SSL_R_BAD_EXTENSION); |
6dd083fd MC |
1411 | return 0; |
1412 | } | |
fb34a0f4 | 1413 | if (PACKET_remaining(pkt) > 0) { |
c48ffbcc | 1414 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
fb34a0f4 MC |
1415 | return 0; |
1416 | } | |
1266eefd | 1417 | |
aff8c126 | 1418 | s->ext.ticket_expected = 1; |
6dd083fd MC |
1419 | |
1420 | return 1; | |
1421 | } | |
1422 | ||
ab83e314 | 1423 | #ifndef OPENSSL_NO_OCSP |
38b051a1 TM |
1424 | int tls_parse_stoc_status_request(SSL_CONNECTION *s, PACKET *pkt, |
1425 | unsigned int context, | |
f63a17d6 | 1426 | X509 *x, size_t chainidx) |
6dd083fd | 1427 | { |
5de683d2 MC |
1428 | if (context == SSL_EXT_TLS1_3_CERTIFICATE_REQUEST) { |
1429 | /* We ignore this if the server sends a CertificateRequest */ | |
5de683d2 MC |
1430 | return 1; |
1431 | } | |
1432 | ||
6dd083fd | 1433 | /* |
f63e4288 MC |
1434 | * MUST only be sent if we've requested a status |
1435 | * request message. In TLS <= 1.2 it must also be empty. | |
6dd083fd | 1436 | */ |
fb34a0f4 | 1437 | if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) { |
c48ffbcc | 1438 | SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION, SSL_R_BAD_EXTENSION); |
6dd083fd MC |
1439 | return 0; |
1440 | } | |
38b051a1 | 1441 | if (!SSL_CONNECTION_IS_TLS13(s) && PACKET_remaining(pkt) > 0) { |
c48ffbcc | 1442 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
fb34a0f4 MC |
1443 | return 0; |
1444 | } | |
f63e4288 | 1445 | |
38b051a1 | 1446 | if (SSL_CONNECTION_IS_TLS13(s)) { |
f63e4288 | 1447 | /* We only know how to handle this if it's for the first Certificate in |
1ee4b98e | 1448 | * the chain. We ignore any other responses. |
f63e4288 | 1449 | */ |
8521ced6 | 1450 | if (chainidx != 0) |
f63e4288 | 1451 | return 1; |
f63a17d6 MC |
1452 | |
1453 | /* SSLfatal() already called */ | |
1454 | return tls_process_cert_status_body(s, pkt); | |
f63e4288 MC |
1455 | } |
1456 | ||
6dd083fd | 1457 | /* Set flag to expect CertificateStatus message */ |
aff8c126 | 1458 | s->ext.status_expected = 1; |
6dd083fd MC |
1459 | |
1460 | return 1; | |
1461 | } | |
ab83e314 | 1462 | #endif |
6dd083fd MC |
1463 | |
1464 | ||
1465 | #ifndef OPENSSL_NO_CT | |
38b051a1 TM |
1466 | int tls_parse_stoc_sct(SSL_CONNECTION *s, PACKET *pkt, unsigned int context, |
1467 | X509 *x, size_t chainidx) | |
6dd083fd | 1468 | { |
5de683d2 MC |
1469 | if (context == SSL_EXT_TLS1_3_CERTIFICATE_REQUEST) { |
1470 | /* We ignore this if the server sends it in a CertificateRequest */ | |
5de683d2 MC |
1471 | return 1; |
1472 | } | |
1473 | ||
6dd083fd MC |
1474 | /* |
1475 | * Only take it if we asked for it - i.e if there is no CT validation | |
1476 | * callback set, then a custom extension MAY be processing it, so we | |
1477 | * need to let control continue to flow to that. | |
1478 | */ | |
1479 | if (s->ct_validation_callback != NULL) { | |
1480 | size_t size = PACKET_remaining(pkt); | |
1481 | ||
1482 | /* Simply copy it off for later processing */ | |
aff8c126 RS |
1483 | OPENSSL_free(s->ext.scts); |
1484 | s->ext.scts = NULL; | |
1266eefd | 1485 | |
3a63c0ed | 1486 | s->ext.scts_len = (uint16_t)size; |
6dd083fd | 1487 | if (size > 0) { |
aff8c126 | 1488 | s->ext.scts = OPENSSL_malloc(size); |
39a14059 MC |
1489 | if (s->ext.scts == NULL) { |
1490 | s->ext.scts_len = 0; | |
1491 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); | |
1492 | return 0; | |
1493 | } | |
1494 | if (!PACKET_copy_bytes(pkt, s->ext.scts, size)) { | |
c48ffbcc | 1495 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1496 | return 0; |
1497 | } | |
1498 | } | |
1499 | } else { | |
b186a592 MC |
1500 | ENDPOINT role = (context & SSL_EXT_TLS1_2_SERVER_HELLO) != 0 |
1501 | ? ENDPOINT_CLIENT : ENDPOINT_BOTH; | |
1502 | ||
1503 | /* | |
1504 | * If we didn't ask for it then there must be a custom extension, | |
1505 | * otherwise this is unsolicited. | |
1506 | */ | |
1507 | if (custom_ext_find(&s->cert->custext, role, | |
1508 | TLSEXT_TYPE_signed_certificate_timestamp, | |
1509 | NULL) == NULL) { | |
c48ffbcc | 1510 | SSLfatal(s, TLS1_AD_UNSUPPORTED_EXTENSION, SSL_R_BAD_EXTENSION); |
b186a592 MC |
1511 | return 0; |
1512 | } | |
1513 | ||
f63a17d6 | 1514 | if (!custom_ext_parse(s, context, |
43ae5eed MC |
1515 | TLSEXT_TYPE_signed_certificate_timestamp, |
1516 | PACKET_data(pkt), PACKET_remaining(pkt), | |
f63a17d6 MC |
1517 | x, chainidx)) { |
1518 | /* SSLfatal already called */ | |
6dd083fd | 1519 | return 0; |
f63a17d6 | 1520 | } |
6dd083fd MC |
1521 | } |
1522 | ||
1523 | return 1; | |
1524 | } | |
1525 | #endif | |
1526 | ||
1527 | ||
1528 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
1529 | /* | |
1530 | * ssl_next_proto_validate validates a Next Protocol Negotiation block. No | |
1531 | * elements of zero length are allowed and the set of elements must exactly | |
1532 | * fill the length of the block. Returns 1 on success or 0 on failure. | |
1533 | */ | |
38b051a1 | 1534 | static int ssl_next_proto_validate(SSL_CONNECTION *s, PACKET *pkt) |
6dd083fd MC |
1535 | { |
1536 | PACKET tmp_protocol; | |
1537 | ||
1538 | while (PACKET_remaining(pkt)) { | |
1539 | if (!PACKET_get_length_prefixed_1(pkt, &tmp_protocol) | |
f63a17d6 | 1540 | || PACKET_remaining(&tmp_protocol) == 0) { |
c48ffbcc | 1541 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
6dd083fd | 1542 | return 0; |
f63a17d6 | 1543 | } |
6dd083fd MC |
1544 | } |
1545 | ||
1546 | return 1; | |
1547 | } | |
1548 | ||
38b051a1 TM |
1549 | int tls_parse_stoc_npn(SSL_CONNECTION *s, PACKET *pkt, unsigned int context, |
1550 | X509 *x, size_t chainidx) | |
6dd083fd MC |
1551 | { |
1552 | unsigned char *selected; | |
1553 | unsigned char selected_len; | |
1554 | PACKET tmppkt; | |
38b051a1 | 1555 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
6dd083fd | 1556 | |
1266eefd | 1557 | /* Check if we are in a renegotiation. If so ignore this extension */ |
c7f47786 | 1558 | if (!SSL_IS_FIRST_HANDSHAKE(s)) |
6dd083fd MC |
1559 | return 1; |
1560 | ||
1561 | /* We must have requested it. */ | |
38b051a1 | 1562 | if (sctx->ext.npn_select_cb == NULL) { |
c48ffbcc | 1563 | SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION, SSL_R_BAD_EXTENSION); |
6dd083fd MC |
1564 | return 0; |
1565 | } | |
1266eefd | 1566 | |
6dd083fd MC |
1567 | /* The data must be valid */ |
1568 | tmppkt = *pkt; | |
f63a17d6 MC |
1569 | if (!ssl_next_proto_validate(s, &tmppkt)) { |
1570 | /* SSLfatal() already called */ | |
6dd083fd MC |
1571 | return 0; |
1572 | } | |
38b051a1 TM |
1573 | if (sctx->ext.npn_select_cb(SSL_CONNECTION_GET_SSL(s), |
1574 | &selected, &selected_len, | |
1575 | PACKET_data(pkt), PACKET_remaining(pkt), | |
1576 | sctx->ext.npn_select_cb_arg) != | |
6dd083fd | 1577 | SSL_TLSEXT_ERR_OK) { |
c48ffbcc | 1578 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_BAD_EXTENSION); |
6dd083fd MC |
1579 | return 0; |
1580 | } | |
1266eefd | 1581 | |
6dd083fd MC |
1582 | /* |
1583 | * Could be non-NULL if server has sent multiple NPN extensions in | |
1584 | * a single Serverhello | |
1585 | */ | |
aff8c126 RS |
1586 | OPENSSL_free(s->ext.npn); |
1587 | s->ext.npn = OPENSSL_malloc(selected_len); | |
1588 | if (s->ext.npn == NULL) { | |
39a14059 | 1589 | s->ext.npn_len = 0; |
c48ffbcc | 1590 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1591 | return 0; |
1592 | } | |
1593 | ||
aff8c126 RS |
1594 | memcpy(s->ext.npn, selected, selected_len); |
1595 | s->ext.npn_len = selected_len; | |
555cbb32 | 1596 | s->s3.npn_seen = 1; |
6dd083fd MC |
1597 | |
1598 | return 1; | |
1599 | } | |
1600 | #endif | |
1601 | ||
38b051a1 TM |
1602 | int tls_parse_stoc_alpn(SSL_CONNECTION *s, PACKET *pkt, unsigned int context, |
1603 | X509 *x, size_t chainidx) | |
6dd083fd MC |
1604 | { |
1605 | size_t len; | |
1606 | ||
1607 | /* We must have requested it. */ | |
555cbb32 | 1608 | if (!s->s3.alpn_sent) { |
c48ffbcc | 1609 | SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION, SSL_R_BAD_EXTENSION); |
6dd083fd MC |
1610 | return 0; |
1611 | } | |
1612 | /*- | |
1613 | * The extension data consists of: | |
1614 | * uint16 list_length | |
1615 | * uint8 proto_length; | |
1616 | * uint8 proto[proto_length]; | |
1617 | */ | |
1618 | if (!PACKET_get_net_2_len(pkt, &len) | |
1619 | || PACKET_remaining(pkt) != len || !PACKET_get_1_len(pkt, &len) | |
1620 | || PACKET_remaining(pkt) != len) { | |
c48ffbcc | 1621 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
6dd083fd MC |
1622 | return 0; |
1623 | } | |
555cbb32 TS |
1624 | OPENSSL_free(s->s3.alpn_selected); |
1625 | s->s3.alpn_selected = OPENSSL_malloc(len); | |
1626 | if (s->s3.alpn_selected == NULL) { | |
39a14059 | 1627 | s->s3.alpn_selected_len = 0; |
c48ffbcc | 1628 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1629 | return 0; |
1630 | } | |
555cbb32 | 1631 | if (!PACKET_copy_bytes(pkt, s->s3.alpn_selected, len)) { |
c48ffbcc | 1632 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
6dd083fd MC |
1633 | return 0; |
1634 | } | |
555cbb32 | 1635 | s->s3.alpn_selected_len = len; |
6dd083fd | 1636 | |
0ef28021 MC |
1637 | if (s->session->ext.alpn_selected == NULL |
1638 | || s->session->ext.alpn_selected_len != len | |
555cbb32 | 1639 | || memcmp(s->session->ext.alpn_selected, s->s3.alpn_selected, len) |
0ef28021 | 1640 | != 0) { |
4be3a7c7 MC |
1641 | /* ALPN not consistent with the old session so cannot use early_data */ |
1642 | s->ext.early_data_ok = 0; | |
1643 | } | |
1644 | if (!s->hit) { | |
9d5db9c9 MC |
1645 | /* |
1646 | * This is a new session and so alpn_selected should have been | |
1647 | * initialised to NULL. We should update it with the selected ALPN. | |
1648 | */ | |
1649 | if (!ossl_assert(s->session->ext.alpn_selected == NULL)) { | |
c48ffbcc | 1650 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
9d5db9c9 MC |
1651 | return 0; |
1652 | } | |
4be3a7c7 | 1653 | s->session->ext.alpn_selected = |
555cbb32 | 1654 | OPENSSL_memdup(s->s3.alpn_selected, s->s3.alpn_selected_len); |
4be3a7c7 | 1655 | if (s->session->ext.alpn_selected == NULL) { |
39a14059 | 1656 | s->session->ext.alpn_selected_len = 0; |
c48ffbcc | 1657 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
4be3a7c7 MC |
1658 | return 0; |
1659 | } | |
555cbb32 | 1660 | s->session->ext.alpn_selected_len = s->s3.alpn_selected_len; |
ae8d7d99 MC |
1661 | } |
1662 | ||
6dd083fd MC |
1663 | return 1; |
1664 | } | |
1665 | ||
1666 | #ifndef OPENSSL_NO_SRTP | |
38b051a1 TM |
1667 | int tls_parse_stoc_use_srtp(SSL_CONNECTION *s, PACKET *pkt, |
1668 | unsigned int context, X509 *x, size_t chainidx) | |
6dd083fd MC |
1669 | { |
1670 | unsigned int id, ct, mki; | |
1671 | int i; | |
1672 | STACK_OF(SRTP_PROTECTION_PROFILE) *clnt; | |
1673 | SRTP_PROTECTION_PROFILE *prof; | |
1674 | ||
1266eefd MC |
1675 | if (!PACKET_get_net_2(pkt, &ct) || ct != 2 |
1676 | || !PACKET_get_net_2(pkt, &id) | |
1677 | || !PACKET_get_1(pkt, &mki) | |
1678 | || PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 1679 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
f63a17d6 | 1680 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
6dd083fd MC |
1681 | return 0; |
1682 | } | |
1683 | ||
1684 | if (mki != 0) { | |
1685 | /* Must be no MKI, since we never offer one */ | |
c48ffbcc | 1686 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_SRTP_MKI_VALUE); |
6dd083fd MC |
1687 | return 0; |
1688 | } | |
1689 | ||
6dd083fd | 1690 | /* Throw an error if the server gave us an unsolicited extension */ |
38b051a1 | 1691 | clnt = SSL_get_srtp_profiles(SSL_CONNECTION_GET_SSL(s)); |
6dd083fd | 1692 | if (clnt == NULL) { |
c48ffbcc | 1693 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_NO_SRTP_PROFILES); |
6dd083fd MC |
1694 | return 0; |
1695 | } | |
1696 | ||
1697 | /* | |
1698 | * Check to see if the server gave us something we support (and | |
1699 | * presumably offered) | |
1700 | */ | |
1701 | for (i = 0; i < sk_SRTP_PROTECTION_PROFILE_num(clnt); i++) { | |
1702 | prof = sk_SRTP_PROTECTION_PROFILE_value(clnt, i); | |
1703 | ||
1704 | if (prof->id == id) { | |
1705 | s->srtp_profile = prof; | |
6dd083fd MC |
1706 | return 1; |
1707 | } | |
1708 | } | |
1709 | ||
c48ffbcc | 1710 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
f63a17d6 | 1711 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
6dd083fd MC |
1712 | return 0; |
1713 | } | |
1714 | #endif | |
1715 | ||
38b051a1 TM |
1716 | int tls_parse_stoc_etm(SSL_CONNECTION *s, PACKET *pkt, unsigned int context, |
1717 | X509 *x, size_t chainidx) | |
6dd083fd MC |
1718 | { |
1719 | /* Ignore if inappropriate ciphersuite */ | |
1720 | if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC) | |
555cbb32 | 1721 | && s->s3.tmp.new_cipher->algorithm_mac != SSL_AEAD |
d724da69 DB |
1722 | && s->s3.tmp.new_cipher->algorithm_enc != SSL_RC4 |
1723 | && s->s3.tmp.new_cipher->algorithm_enc != SSL_eGOST2814789CNT | |
1724 | && s->s3.tmp.new_cipher->algorithm_enc != SSL_eGOST2814789CNT12 | |
1725 | && s->s3.tmp.new_cipher->algorithm_enc != SSL_MAGMA | |
1726 | && s->s3.tmp.new_cipher->algorithm_enc != SSL_KUZNYECHIK) | |
28a31a0a | 1727 | s->ext.use_etm = 1; |
6dd083fd MC |
1728 | |
1729 | return 1; | |
1730 | } | |
1731 | ||
38b051a1 TM |
1732 | int tls_parse_stoc_ems(SSL_CONNECTION *s, PACKET *pkt, unsigned int context, |
1733 | X509 *x, size_t chainidx) | |
6dd083fd | 1734 | { |
088dfa13 TS |
1735 | if (s->options & SSL_OP_NO_EXTENDED_MASTER_SECRET) |
1736 | return 1; | |
555cbb32 | 1737 | s->s3.flags |= TLS1_FLAGS_RECEIVED_EXTMS; |
6dd083fd MC |
1738 | if (!s->hit) |
1739 | s->session->flags |= SSL_SESS_FLAG_EXTMS; | |
1740 | ||
1741 | return 1; | |
1742 | } | |
1743 | ||
38b051a1 TM |
1744 | int tls_parse_stoc_supported_versions(SSL_CONNECTION *s, PACKET *pkt, |
1745 | unsigned int context, | |
88050dd1 MC |
1746 | X509 *x, size_t chainidx) |
1747 | { | |
1748 | unsigned int version; | |
1749 | ||
1750 | if (!PACKET_get_net_2(pkt, &version) | |
1751 | || PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 1752 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
88050dd1 MC |
1753 | return 0; |
1754 | } | |
1755 | ||
27e462f1 MC |
1756 | /* |
1757 | * The only protocol version we support which is valid in this extension in | |
1758 | * a ServerHello is TLSv1.3 therefore we shouldn't be getting anything else. | |
1759 | */ | |
1760 | if (version != TLS1_3_VERSION) { | |
1761 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, | |
27e462f1 MC |
1762 | SSL_R_BAD_PROTOCOL_VERSION_NUMBER); |
1763 | return 0; | |
1764 | } | |
1765 | ||
426dfc9f | 1766 | /* We ignore this extension for HRRs except to sanity check it */ |
27e462f1 | 1767 | if (context == SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST) |
426dfc9f | 1768 | return 1; |
426dfc9f | 1769 | |
88050dd1 MC |
1770 | /* We just set it here. We validate it in ssl_choose_client_version */ |
1771 | s->version = version; | |
1772 | ||
1773 | return 1; | |
1774 | } | |
1775 | ||
38b051a1 TM |
1776 | int tls_parse_stoc_key_share(SSL_CONNECTION *s, PACKET *pkt, |
1777 | unsigned int context, X509 *x, | |
f63a17d6 | 1778 | size_t chainidx) |
6dd083fd | 1779 | { |
3cf96e88 | 1780 | #ifndef OPENSSL_NO_TLS1_3 |
6dd083fd MC |
1781 | unsigned int group_id; |
1782 | PACKET encoded_pt; | |
555cbb32 | 1783 | EVP_PKEY *ckey = s->s3.tmp.pkey, *skey = NULL; |
a011b586 | 1784 | const TLS_GROUP_INFO *ginf = NULL; |
6dd083fd MC |
1785 | |
1786 | /* Sanity check */ | |
555cbb32 | 1787 | if (ckey == NULL || s->s3.peer_tmp != NULL) { |
c48ffbcc | 1788 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1789 | return 0; |
1790 | } | |
1791 | ||
1792 | if (!PACKET_get_net_2(pkt, &group_id)) { | |
c48ffbcc | 1793 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
6dd083fd MC |
1794 | return 0; |
1795 | } | |
1796 | ||
0a10825a | 1797 | group_id = ssl_group_id_tls13_to_internal(group_id); |
fe874d27 | 1798 | if ((context & SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST) != 0) { |
f48d826e DSH |
1799 | const uint16_t *pgroups = NULL; |
1800 | size_t i, num_groups; | |
3847d426 MC |
1801 | |
1802 | if (PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 1803 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
3847d426 MC |
1804 | return 0; |
1805 | } | |
1806 | ||
1807 | /* | |
1808 | * It is an error if the HelloRetryRequest wants a key_share that we | |
1809 | * already sent in the first ClientHello | |
1810 | */ | |
555cbb32 | 1811 | if (group_id == s->s3.group_id) { |
c48ffbcc | 1812 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_KEY_SHARE); |
3847d426 MC |
1813 | return 0; |
1814 | } | |
1815 | ||
1816 | /* Validate the selected group is one we support */ | |
f48d826e DSH |
1817 | tls1_get_supported_groups(s, &pgroups, &num_groups); |
1818 | for (i = 0; i < num_groups; i++) { | |
1819 | if (group_id == pgroups[i]) | |
3847d426 MC |
1820 | break; |
1821 | } | |
f48d826e | 1822 | if (i >= num_groups |
dbc6268f | 1823 | || !tls_group_allowed(s, group_id, SSL_SECOP_CURVE_SUPPORTED)) { |
c48ffbcc | 1824 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_KEY_SHARE); |
3847d426 MC |
1825 | return 0; |
1826 | } | |
1827 | ||
555cbb32 TS |
1828 | s->s3.group_id = group_id; |
1829 | EVP_PKEY_free(s->s3.tmp.pkey); | |
1830 | s->s3.tmp.pkey = NULL; | |
3847d426 MC |
1831 | return 1; |
1832 | } | |
1833 | ||
555cbb32 | 1834 | if (group_id != s->s3.group_id) { |
6dd083fd MC |
1835 | /* |
1836 | * This isn't for the group that we sent in the original | |
1837 | * key_share! | |
1838 | */ | |
c48ffbcc | 1839 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_KEY_SHARE); |
6dd083fd MC |
1840 | return 0; |
1841 | } | |
aa6bd216 BK |
1842 | /* Retain this group in the SSL_SESSION */ |
1843 | if (!s->hit) { | |
1844 | s->session->kex_group = group_id; | |
1845 | } else if (group_id != s->session->kex_group) { | |
1846 | /* | |
1847 | * If this is a resumption but changed what group was used, we need | |
1848 | * to record the new group in the session, but the session is not | |
1849 | * a new session and could be in use by other threads. So, make | |
1850 | * a copy of the session to record the new information so that it's | |
1851 | * useful for any sessions resumed from tickets issued on this | |
1852 | * connection. | |
1853 | */ | |
1854 | SSL_SESSION *new_sess; | |
1855 | ||
1856 | if ((new_sess = ssl_session_dup(s->session, 0)) == NULL) { | |
1857 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); | |
1858 | return 0; | |
1859 | } | |
1860 | SSL_SESSION_free(s->session); | |
1861 | s->session = new_sess; | |
1862 | s->session->kex_group = group_id; | |
1863 | } | |
6dd083fd | 1864 | |
38b051a1 TM |
1865 | if ((ginf = tls1_group_id_lookup(SSL_CONNECTION_GET_CTX(s), |
1866 | group_id)) == NULL) { | |
c48ffbcc | 1867 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_KEY_SHARE); |
a011b586 NT |
1868 | return 0; |
1869 | } | |
1870 | ||
6dd083fd MC |
1871 | if (!PACKET_as_length_prefixed_2(pkt, &encoded_pt) |
1872 | || PACKET_remaining(&encoded_pt) == 0) { | |
c48ffbcc | 1873 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
6dd083fd MC |
1874 | return 0; |
1875 | } | |
1876 | ||
a011b586 NT |
1877 | if (!ginf->is_kem) { |
1878 | /* Regular KEX */ | |
1879 | skey = EVP_PKEY_new(); | |
1880 | if (skey == NULL || EVP_PKEY_copy_parameters(skey, ckey) <= 0) { | |
c48ffbcc | 1881 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_COPY_PARAMETERS_FAILED); |
b3c34401 | 1882 | EVP_PKEY_free(skey); |
a011b586 NT |
1883 | return 0; |
1884 | } | |
afce590b | 1885 | |
d5530efa TM |
1886 | if (tls13_set_encoded_pub_key(skey, PACKET_data(&encoded_pt), |
1887 | PACKET_remaining(&encoded_pt)) <= 0) { | |
c48ffbcc | 1888 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_ECPOINT); |
a011b586 NT |
1889 | EVP_PKEY_free(skey); |
1890 | return 0; | |
1891 | } | |
6dd083fd | 1892 | |
a011b586 NT |
1893 | if (ssl_derive(s, ckey, skey, 1) == 0) { |
1894 | /* SSLfatal() already called */ | |
1895 | EVP_PKEY_free(skey); | |
1896 | return 0; | |
1897 | } | |
1898 | s->s3.peer_tmp = skey; | |
1899 | } else { | |
1900 | /* KEM Mode */ | |
1901 | const unsigned char *ct = PACKET_data(&encoded_pt); | |
1902 | size_t ctlen = PACKET_remaining(&encoded_pt); | |
1903 | ||
1904 | if (ssl_decapsulate(s, ckey, ct, ctlen, 1) == 0) { | |
1905 | /* SSLfatal() already called */ | |
1906 | return 0; | |
1907 | } | |
6dd083fd | 1908 | } |
aa6bd216 | 1909 | s->s3.did_kex = 1; |
3cf96e88 | 1910 | #endif |
6dd083fd MC |
1911 | |
1912 | return 1; | |
1913 | } | |
4ff65f77 | 1914 | |
38b051a1 TM |
1915 | int tls_parse_stoc_cookie(SSL_CONNECTION *s, PACKET *pkt, unsigned int context, |
1916 | X509 *x, size_t chainidx) | |
cfef5027 MC |
1917 | { |
1918 | PACKET cookie; | |
1919 | ||
1920 | if (!PACKET_as_length_prefixed_2(pkt, &cookie) | |
1921 | || !PACKET_memdup(&cookie, &s->ext.tls13_cookie, | |
1922 | &s->ext.tls13_cookie_len)) { | |
c48ffbcc | 1923 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
cfef5027 MC |
1924 | return 0; |
1925 | } | |
1926 | ||
1927 | return 1; | |
1928 | } | |
1929 | ||
38b051a1 TM |
1930 | int tls_parse_stoc_early_data(SSL_CONNECTION *s, PACKET *pkt, |
1931 | unsigned int context, | |
f63a17d6 | 1932 | X509 *x, size_t chainidx) |
38df5a45 | 1933 | { |
fe874d27 | 1934 | if (context == SSL_EXT_TLS1_3_NEW_SESSION_TICKET) { |
6594189f MC |
1935 | unsigned long max_early_data; |
1936 | ||
1937 | if (!PACKET_get_net_4(pkt, &max_early_data) | |
1938 | || PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 1939 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_INVALID_MAX_EARLY_DATA); |
6594189f MC |
1940 | return 0; |
1941 | } | |
1942 | ||
1943 | s->session->ext.max_early_data = max_early_data; | |
1944 | ||
1945 | return 1; | |
1946 | } | |
1947 | ||
38df5a45 | 1948 | if (PACKET_remaining(pkt) != 0) { |
c48ffbcc | 1949 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
38df5a45 MC |
1950 | return 0; |
1951 | } | |
1952 | ||
4be3a7c7 | 1953 | if (!s->ext.early_data_ok |
c96ce52c | 1954 | || !s->hit) { |
38df5a45 MC |
1955 | /* |
1956 | * If we get here then we didn't send early data, or we didn't resume | |
4be3a7c7 MC |
1957 | * using the first identity, or the SNI/ALPN is not consistent so the |
1958 | * server should not be accepting it. | |
38df5a45 | 1959 | */ |
c48ffbcc | 1960 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_EXTENSION); |
38df5a45 MC |
1961 | return 0; |
1962 | } | |
1963 | ||
1964 | s->ext.early_data = SSL_EARLY_DATA_ACCEPTED; | |
1965 | ||
1966 | return 1; | |
1967 | } | |
1968 | ||
38b051a1 TM |
1969 | int tls_parse_stoc_psk(SSL_CONNECTION *s, PACKET *pkt, |
1970 | unsigned int context, X509 *x, | |
f63a17d6 | 1971 | size_t chainidx) |
4ff65f77 MC |
1972 | { |
1973 | #ifndef OPENSSL_NO_TLS1_3 | |
1974 | unsigned int identity; | |
1975 | ||
1976 | if (!PACKET_get_net_2(pkt, &identity) || PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 1977 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
4ff65f77 MC |
1978 | return 0; |
1979 | } | |
1980 | ||
c96ce52c | 1981 | if (identity >= (unsigned int)s->ext.tick_identity) { |
c48ffbcc | 1982 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_PSK_IDENTITY); |
c96ce52c MC |
1983 | return 0; |
1984 | } | |
1985 | ||
1986 | /* | |
1987 | * Session resumption tickets are always sent before PSK tickets. If the | |
1988 | * ticket index is 0 then it must be for a session resumption ticket if we | |
1989 | * sent two tickets, or if we didn't send a PSK ticket. | |
1990 | */ | |
1991 | if (identity == 0 && (s->psksession == NULL || s->ext.tick_identity == 2)) { | |
9368f865 MC |
1992 | s->hit = 1; |
1993 | SSL_SESSION_free(s->psksession); | |
1994 | s->psksession = NULL; | |
1995 | return 1; | |
1996 | } | |
1997 | ||
c96ce52c MC |
1998 | if (s->psksession == NULL) { |
1999 | /* Should never happen */ | |
c48ffbcc | 2000 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
4ff65f77 MC |
2001 | return 0; |
2002 | } | |
2003 | ||
add8d0e9 MC |
2004 | /* |
2005 | * If we used the external PSK for sending early_data then s->early_secret | |
2006 | * is already set up, so don't overwrite it. Otherwise we copy the | |
2007 | * early_secret across that we generated earlier. | |
2008 | */ | |
2009 | if ((s->early_data_state != SSL_EARLY_DATA_WRITE_RETRY | |
2010 | && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING) | |
2011 | || s->session->ext.max_early_data > 0 | |
2012 | || s->psksession->ext.max_early_data == 0) | |
2013 | memcpy(s->early_secret, s->psksession->early_secret, EVP_MAX_MD_SIZE); | |
2014 | ||
9368f865 MC |
2015 | SSL_SESSION_free(s->session); |
2016 | s->session = s->psksession; | |
2017 | s->psksession = NULL; | |
4ff65f77 | 2018 | s->hit = 1; |
c96ce52c MC |
2019 | /* Early data is only allowed if we used the first ticket */ |
2020 | if (identity != 0) | |
2021 | s->ext.early_data_ok = 0; | |
4ff65f77 MC |
2022 | #endif |
2023 | ||
2024 | return 1; | |
2025 | } |