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6dd083fd | 1 | /* |
33388b44 | 2 | * Copyright 2016-2020 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 | ||
8b1db5d3 | 154 | #ifndef OPENSSL_NO_EC |
b186a592 MC |
155 | EXT_RETURN tls_construct_ctos_ec_pt_formats(SSL *s, WPACKET *pkt, |
156 | unsigned int context, X509 *x, | |
f63a17d6 | 157 | size_t chainidx) |
ab83e314 MC |
158 | { |
159 | const unsigned char *pformats; | |
160 | size_t num_formats; | |
dbc6268f | 161 | int reason, min_version, max_version; |
ab83e314 | 162 | |
dbc6268f MC |
163 | reason = ssl_get_min_max_version(s, &min_version, &max_version, NULL); |
164 | if (reason != 0) { | |
c48ffbcc | 165 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, reason); |
dbc6268f MC |
166 | return EXT_RETURN_FAIL; |
167 | } | |
9d2d857f | 168 | if (!use_ecc(s, min_version, max_version)) |
b186a592 | 169 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
170 | |
171 | /* Add TLS extension ECPointFormats to the ClientHello message */ | |
ab83e314 MC |
172 | tls1_get_formatlist(s, &pformats, &num_formats); |
173 | ||
174 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_ec_point_formats) | |
175 | /* Sub-packet for formats extension */ | |
176 | || !WPACKET_start_sub_packet_u16(pkt) | |
177 | || !WPACKET_sub_memcpy_u8(pkt, pformats, num_formats) | |
178 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 179 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 180 | return EXT_RETURN_FAIL; |
ab83e314 MC |
181 | } |
182 | ||
b186a592 | 183 | return EXT_RETURN_SENT; |
ab83e314 | 184 | } |
dbc6268f | 185 | #endif |
ab83e314 | 186 | |
b186a592 MC |
187 | EXT_RETURN tls_construct_ctos_supported_groups(SSL *s, WPACKET *pkt, |
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) | |
206 | && (SSL_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)) { |
9e84a42d | 229 | if (!WPACKET_put_bytes_u16(pkt, ctmp)) { |
c48ffbcc | 230 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
9aaecbfc | 231 | return EXT_RETURN_FAIL; |
232 | } | |
8b1db5d3 MC |
233 | if (okfortls13 && max_version == TLS1_3_VERSION) |
234 | tls13added++; | |
235 | added++; | |
ab83e314 MC |
236 | } |
237 | } | |
238 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
8b1db5d3 MC |
239 | if (added == 0 || (tls13added == 0 && max_version == TLS1_3_VERSION)) |
240 | SSLfatal_data(s, SSL_AD_INTERNAL_ERROR, SSL_R_NO_SUITABLE_GROUPS, | |
241 | "No groups enabled for max supported SSL/TLS version"); | |
242 | else | |
243 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
b186a592 | 244 | return EXT_RETURN_FAIL; |
ab83e314 MC |
245 | } |
246 | ||
b186a592 | 247 | return EXT_RETURN_SENT; |
ab83e314 | 248 | } |
ab83e314 | 249 | |
b186a592 MC |
250 | EXT_RETURN tls_construct_ctos_session_ticket(SSL *s, WPACKET *pkt, |
251 | unsigned int context, X509 *x, | |
f63a17d6 | 252 | size_t chainidx) |
ab83e314 MC |
253 | { |
254 | size_t ticklen; | |
255 | ||
256 | if (!tls_use_ticket(s)) | |
b186a592 | 257 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
258 | |
259 | if (!s->new_session && s->session != NULL | |
08191294 MC |
260 | && s->session->ext.tick != NULL |
261 | && s->session->ssl_version != TLS1_3_VERSION) { | |
aff8c126 RS |
262 | ticklen = s->session->ext.ticklen; |
263 | } else if (s->session && s->ext.session_ticket != NULL | |
264 | && s->ext.session_ticket->data != NULL) { | |
265 | ticklen = s->ext.session_ticket->length; | |
266 | s->session->ext.tick = OPENSSL_malloc(ticklen); | |
267 | if (s->session->ext.tick == NULL) { | |
c48ffbcc | 268 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 269 | return EXT_RETURN_FAIL; |
ab83e314 | 270 | } |
aff8c126 RS |
271 | memcpy(s->session->ext.tick, |
272 | s->ext.session_ticket->data, ticklen); | |
273 | s->session->ext.ticklen = ticklen; | |
ab83e314 MC |
274 | } else { |
275 | ticklen = 0; | |
276 | } | |
277 | ||
aff8c126 RS |
278 | if (ticklen == 0 && s->ext.session_ticket != NULL && |
279 | s->ext.session_ticket->data == NULL) | |
b186a592 | 280 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
281 | |
282 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket) | |
aff8c126 | 283 | || !WPACKET_sub_memcpy_u16(pkt, s->session->ext.tick, ticklen)) { |
c48ffbcc | 284 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 285 | return EXT_RETURN_FAIL; |
ab83e314 MC |
286 | } |
287 | ||
b186a592 | 288 | return EXT_RETURN_SENT; |
ab83e314 MC |
289 | } |
290 | ||
b186a592 MC |
291 | EXT_RETURN tls_construct_ctos_sig_algs(SSL *s, WPACKET *pkt, |
292 | unsigned int context, X509 *x, | |
f63a17d6 | 293 | size_t chainidx) |
ab83e314 MC |
294 | { |
295 | size_t salglen; | |
98c792d1 | 296 | const uint16_t *salg; |
ab83e314 MC |
297 | |
298 | if (!SSL_CLIENT_USE_SIGALGS(s)) | |
b186a592 | 299 | return EXT_RETURN_NOT_SENT; |
ab83e314 | 300 | |
a9669ddc | 301 | salglen = tls12_get_psigalgs(s, 1, &salg); |
ab83e314 MC |
302 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signature_algorithms) |
303 | /* Sub-packet for sig-algs extension */ | |
304 | || !WPACKET_start_sub_packet_u16(pkt) | |
305 | /* Sub-packet for the actual list */ | |
306 | || !WPACKET_start_sub_packet_u16(pkt) | |
307 | || !tls12_copy_sigalgs(s, pkt, salg, salglen) | |
308 | || !WPACKET_close(pkt) | |
309 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 310 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 311 | return EXT_RETURN_FAIL; |
ab83e314 MC |
312 | } |
313 | ||
b186a592 | 314 | return EXT_RETURN_SENT; |
ab83e314 MC |
315 | } |
316 | ||
317 | #ifndef OPENSSL_NO_OCSP | |
b186a592 MC |
318 | EXT_RETURN tls_construct_ctos_status_request(SSL *s, WPACKET *pkt, |
319 | unsigned int context, X509 *x, | |
f63a17d6 | 320 | size_t chainidx) |
ab83e314 MC |
321 | { |
322 | int i; | |
323 | ||
e96e0f8e MC |
324 | /* This extension isn't defined for client Certificates */ |
325 | if (x != NULL) | |
b186a592 | 326 | return EXT_RETURN_NOT_SENT; |
e96e0f8e | 327 | |
aff8c126 | 328 | if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) |
b186a592 | 329 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
330 | |
331 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request) | |
332 | /* Sub-packet for status request extension */ | |
333 | || !WPACKET_start_sub_packet_u16(pkt) | |
334 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_STATUSTYPE_ocsp) | |
335 | /* Sub-packet for the ids */ | |
336 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
c48ffbcc | 337 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 338 | return EXT_RETURN_FAIL; |
ab83e314 | 339 | } |
aff8c126 | 340 | for (i = 0; i < sk_OCSP_RESPID_num(s->ext.ocsp.ids); i++) { |
ab83e314 | 341 | unsigned char *idbytes; |
aff8c126 | 342 | OCSP_RESPID *id = sk_OCSP_RESPID_value(s->ext.ocsp.ids, i); |
1266eefd | 343 | int idlen = i2d_OCSP_RESPID(id, NULL); |
ab83e314 | 344 | |
ab83e314 MC |
345 | if (idlen <= 0 |
346 | /* Sub-packet for an individual id */ | |
347 | || !WPACKET_sub_allocate_bytes_u16(pkt, idlen, &idbytes) | |
348 | || i2d_OCSP_RESPID(id, &idbytes) != idlen) { | |
c48ffbcc | 349 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 350 | return EXT_RETURN_FAIL; |
ab83e314 MC |
351 | } |
352 | } | |
353 | if (!WPACKET_close(pkt) | |
354 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
c48ffbcc | 355 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 356 | return EXT_RETURN_FAIL; |
ab83e314 | 357 | } |
aff8c126 | 358 | if (s->ext.ocsp.exts) { |
ab83e314 | 359 | unsigned char *extbytes; |
aff8c126 | 360 | int extlen = i2d_X509_EXTENSIONS(s->ext.ocsp.exts, NULL); |
ab83e314 MC |
361 | |
362 | if (extlen < 0) { | |
c48ffbcc | 363 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 364 | return EXT_RETURN_FAIL; |
ab83e314 MC |
365 | } |
366 | if (!WPACKET_allocate_bytes(pkt, extlen, &extbytes) | |
aff8c126 | 367 | || i2d_X509_EXTENSIONS(s->ext.ocsp.exts, &extbytes) |
ab83e314 | 368 | != extlen) { |
c48ffbcc | 369 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 370 | return EXT_RETURN_FAIL; |
ab83e314 MC |
371 | } |
372 | } | |
373 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
c48ffbcc | 374 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 375 | return EXT_RETURN_FAIL; |
ab83e314 MC |
376 | } |
377 | ||
b186a592 | 378 | return EXT_RETURN_SENT; |
ab83e314 MC |
379 | } |
380 | #endif | |
381 | ||
382 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
b186a592 | 383 | EXT_RETURN tls_construct_ctos_npn(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 384 | X509 *x, size_t chainidx) |
ab83e314 | 385 | { |
c7f47786 | 386 | if (s->ctx->ext.npn_select_cb == NULL || !SSL_IS_FIRST_HANDSHAKE(s)) |
b186a592 | 387 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
388 | |
389 | /* | |
390 | * The client advertises an empty extension to indicate its support | |
391 | * for Next Protocol Negotiation | |
392 | */ | |
393 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_next_proto_neg) | |
394 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
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 | ||
b186a592 | 403 | EXT_RETURN tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 404 | X509 *x, size_t chainidx) |
ab83e314 | 405 | { |
555cbb32 | 406 | s->s3.alpn_sent = 0; |
ab83e314 | 407 | |
c7f47786 | 408 | if (s->ext.alpn == NULL || !SSL_IS_FIRST_HANDSHAKE(s)) |
b186a592 | 409 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
410 | |
411 | if (!WPACKET_put_bytes_u16(pkt, | |
412 | TLSEXT_TYPE_application_layer_protocol_negotiation) | |
413 | /* Sub-packet ALPN extension */ | |
414 | || !WPACKET_start_sub_packet_u16(pkt) | |
aff8c126 | 415 | || !WPACKET_sub_memcpy_u16(pkt, s->ext.alpn, s->ext.alpn_len) |
ab83e314 | 416 | || !WPACKET_close(pkt)) { |
c48ffbcc | 417 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 418 | return EXT_RETURN_FAIL; |
ab83e314 | 419 | } |
555cbb32 | 420 | s->s3.alpn_sent = 1; |
ab83e314 | 421 | |
b186a592 | 422 | return EXT_RETURN_SENT; |
ab83e314 MC |
423 | } |
424 | ||
425 | ||
426 | #ifndef OPENSSL_NO_SRTP | |
b186a592 MC |
427 | EXT_RETURN tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt, |
428 | unsigned int context, X509 *x, | |
f63a17d6 | 429 | size_t chainidx) |
ab83e314 MC |
430 | { |
431 | STACK_OF(SRTP_PROTECTION_PROFILE) *clnt = SSL_get_srtp_profiles(s); | |
1266eefd | 432 | int i, end; |
ab83e314 MC |
433 | |
434 | if (clnt == NULL) | |
b186a592 | 435 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
436 | |
437 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp) | |
438 | /* Sub-packet for SRTP extension */ | |
439 | || !WPACKET_start_sub_packet_u16(pkt) | |
440 | /* Sub-packet for the protection profile list */ | |
441 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
c48ffbcc | 442 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 443 | return EXT_RETURN_FAIL; |
ab83e314 | 444 | } |
1266eefd MC |
445 | |
446 | end = sk_SRTP_PROTECTION_PROFILE_num(clnt); | |
447 | for (i = 0; i < end; i++) { | |
448 | const SRTP_PROTECTION_PROFILE *prof = | |
449 | sk_SRTP_PROTECTION_PROFILE_value(clnt, i); | |
450 | ||
ab83e314 | 451 | if (prof == NULL || !WPACKET_put_bytes_u16(pkt, prof->id)) { |
c48ffbcc | 452 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 453 | return EXT_RETURN_FAIL; |
ab83e314 MC |
454 | } |
455 | } | |
456 | if (!WPACKET_close(pkt) | |
457 | /* Add an empty use_mki value */ | |
458 | || !WPACKET_put_bytes_u8(pkt, 0) | |
459 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 460 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 461 | return EXT_RETURN_FAIL; |
ab83e314 MC |
462 | } |
463 | ||
b186a592 | 464 | return EXT_RETURN_SENT; |
ab83e314 MC |
465 | } |
466 | #endif | |
467 | ||
b186a592 | 468 | EXT_RETURN tls_construct_ctos_etm(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 469 | X509 *x, size_t chainidx) |
ab83e314 MC |
470 | { |
471 | if (s->options & SSL_OP_NO_ENCRYPT_THEN_MAC) | |
b186a592 | 472 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
473 | |
474 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac) | |
475 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
c48ffbcc | 476 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 477 | return EXT_RETURN_FAIL; |
ab83e314 MC |
478 | } |
479 | ||
b186a592 | 480 | return EXT_RETURN_SENT; |
ab83e314 MC |
481 | } |
482 | ||
483 | #ifndef OPENSSL_NO_CT | |
b186a592 | 484 | EXT_RETURN tls_construct_ctos_sct(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 485 | X509 *x, size_t chainidx) |
ab83e314 MC |
486 | { |
487 | if (s->ct_validation_callback == NULL) | |
b186a592 | 488 | return EXT_RETURN_NOT_SENT; |
ab83e314 | 489 | |
e96e0f8e MC |
490 | /* Not defined for client Certificates */ |
491 | if (x != NULL) | |
b186a592 | 492 | return EXT_RETURN_NOT_SENT; |
e96e0f8e | 493 | |
ab83e314 MC |
494 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signed_certificate_timestamp) |
495 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
c48ffbcc | 496 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 497 | return EXT_RETURN_FAIL; |
ab83e314 MC |
498 | } |
499 | ||
b186a592 | 500 | return EXT_RETURN_SENT; |
ab83e314 MC |
501 | } |
502 | #endif | |
503 | ||
b186a592 | 504 | EXT_RETURN tls_construct_ctos_ems(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 505 | X509 *x, size_t chainidx) |
ab83e314 | 506 | { |
088dfa13 TS |
507 | if (s->options & SSL_OP_NO_EXTENDED_MASTER_SECRET) |
508 | return EXT_RETURN_NOT_SENT; | |
509 | ||
ab83e314 MC |
510 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret) |
511 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
c48ffbcc | 512 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 513 | return EXT_RETURN_FAIL; |
ab83e314 MC |
514 | } |
515 | ||
b186a592 | 516 | return EXT_RETURN_SENT; |
ab83e314 MC |
517 | } |
518 | ||
b186a592 MC |
519 | EXT_RETURN tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt, |
520 | unsigned int context, X509 *x, | |
f63a17d6 | 521 | size_t chainidx) |
ab83e314 MC |
522 | { |
523 | int currv, min_version, max_version, reason; | |
524 | ||
b5b993b2 | 525 | reason = ssl_get_min_max_version(s, &min_version, &max_version, NULL); |
88050dd1 | 526 | if (reason != 0) { |
c48ffbcc | 527 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, reason); |
88050dd1 MC |
528 | return EXT_RETURN_FAIL; |
529 | } | |
530 | ||
531 | /* | |
532 | * Don't include this if we can't negotiate TLSv1.3. We can do a straight | |
533 | * comparison here because we will never be called in DTLS. | |
534 | */ | |
535 | if (max_version < TLS1_3_VERSION) | |
536 | return EXT_RETURN_NOT_SENT; | |
537 | ||
ab83e314 MC |
538 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_versions) |
539 | || !WPACKET_start_sub_packet_u16(pkt) | |
540 | || !WPACKET_start_sub_packet_u8(pkt)) { | |
c48ffbcc | 541 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 542 | return EXT_RETURN_FAIL; |
ab83e314 MC |
543 | } |
544 | ||
ab83e314 | 545 | for (currv = max_version; currv >= min_version; currv--) { |
35e742ec | 546 | if (!WPACKET_put_bytes_u16(pkt, currv)) { |
c48ffbcc | 547 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 548 | return EXT_RETURN_FAIL; |
ab83e314 MC |
549 | } |
550 | } | |
551 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
c48ffbcc | 552 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 553 | return EXT_RETURN_FAIL; |
ab83e314 MC |
554 | } |
555 | ||
b186a592 | 556 | return EXT_RETURN_SENT; |
ab83e314 MC |
557 | } |
558 | ||
b2f7e8c0 | 559 | /* |
e3c0d76b | 560 | * Construct a psk_kex_modes extension. |
b2f7e8c0 | 561 | */ |
b186a592 MC |
562 | EXT_RETURN tls_construct_ctos_psk_kex_modes(SSL *s, WPACKET *pkt, |
563 | unsigned int context, X509 *x, | |
f63a17d6 | 564 | size_t chainidx) |
b2f7e8c0 MC |
565 | { |
566 | #ifndef OPENSSL_NO_TLS1_3 | |
e3c0d76b MC |
567 | int nodhe = s->options & SSL_OP_ALLOW_NO_DHE_KEX; |
568 | ||
b2f7e8c0 MC |
569 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk_kex_modes) |
570 | || !WPACKET_start_sub_packet_u16(pkt) | |
571 | || !WPACKET_start_sub_packet_u8(pkt) | |
572 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE_DHE) | |
e3c0d76b | 573 | || (nodhe && !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE)) |
b2f7e8c0 MC |
574 | || !WPACKET_close(pkt) |
575 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 576 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 577 | return EXT_RETURN_FAIL; |
b2f7e8c0 | 578 | } |
b3ad72ce | 579 | |
e3c0d76b MC |
580 | s->ext.psk_kex_mode = TLSEXT_KEX_MODE_FLAG_KE_DHE; |
581 | if (nodhe) | |
582 | s->ext.psk_kex_mode |= TLSEXT_KEX_MODE_FLAG_KE; | |
b2f7e8c0 MC |
583 | #endif |
584 | ||
b186a592 | 585 | return EXT_RETURN_SENT; |
b2f7e8c0 MC |
586 | } |
587 | ||
3847d426 MC |
588 | #ifndef OPENSSL_NO_TLS1_3 |
589 | static int add_key_share(SSL *s, WPACKET *pkt, unsigned int curve_id) | |
590 | { | |
7b1ec1cf MC |
591 | unsigned char *encoded_point = NULL; |
592 | EVP_PKEY *key_share_key = NULL; | |
3847d426 MC |
593 | size_t encodedlen; |
594 | ||
555cbb32 | 595 | if (s->s3.tmp.pkey != NULL) { |
fc7129dc | 596 | if (!ossl_assert(s->hello_retry_request == SSL_HRR_PENDING)) { |
c48ffbcc | 597 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
d8028b20 | 598 | return 0; |
7b1ec1cf MC |
599 | } |
600 | /* | |
601 | * Could happen if we got an HRR that wasn't requesting a new key_share | |
602 | */ | |
555cbb32 | 603 | key_share_key = s->s3.tmp.pkey; |
7b1ec1cf | 604 | } else { |
f63a17d6 | 605 | key_share_key = ssl_generate_pkey_group(s, curve_id); |
7b1ec1cf | 606 | if (key_share_key == NULL) { |
f63a17d6 | 607 | /* SSLfatal() already called */ |
d8028b20 | 608 | return 0; |
7b1ec1cf | 609 | } |
3847d426 MC |
610 | } |
611 | ||
612 | /* Encode the public key. */ | |
5ac8fb58 MC |
613 | encodedlen = EVP_PKEY_get1_encoded_public_key(key_share_key, |
614 | &encoded_point); | |
3847d426 | 615 | if (encodedlen == 0) { |
c48ffbcc | 616 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EC_LIB); |
7b1ec1cf | 617 | goto err; |
3847d426 MC |
618 | } |
619 | ||
620 | /* Create KeyShareEntry */ | |
621 | if (!WPACKET_put_bytes_u16(pkt, curve_id) | |
2248dbeb | 622 | || !WPACKET_sub_memcpy_u16(pkt, encoded_point, encodedlen)) { |
c48ffbcc | 623 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
7b1ec1cf | 624 | goto err; |
3847d426 MC |
625 | } |
626 | ||
627 | /* | |
628 | * TODO(TLS1.3): When changing to send more than one key_share we're | |
629 | * going to need to be able to save more than one EVP_PKEY. For now | |
630 | * we reuse the existing tmp.pkey | |
631 | */ | |
555cbb32 TS |
632 | s->s3.tmp.pkey = key_share_key; |
633 | s->s3.group_id = curve_id; | |
2248dbeb | 634 | OPENSSL_free(encoded_point); |
3847d426 | 635 | |
d8028b20 | 636 | return 1; |
7b1ec1cf | 637 | err: |
555cbb32 | 638 | if (s->s3.tmp.pkey == NULL) |
7b1ec1cf MC |
639 | EVP_PKEY_free(key_share_key); |
640 | OPENSSL_free(encoded_point); | |
d8028b20 | 641 | return 0; |
3847d426 MC |
642 | } |
643 | #endif | |
644 | ||
b186a592 MC |
645 | EXT_RETURN tls_construct_ctos_key_share(SSL *s, WPACKET *pkt, |
646 | unsigned int context, X509 *x, | |
f63a17d6 | 647 | size_t chainidx) |
ab83e314 | 648 | { |
3cf96e88 | 649 | #ifndef OPENSSL_NO_TLS1_3 |
f48d826e DSH |
650 | size_t i, num_groups = 0; |
651 | const uint16_t *pgroups = NULL; | |
9e84a42d | 652 | uint16_t curve_id = 0; |
ab83e314 MC |
653 | |
654 | /* key_share extension */ | |
655 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
656 | /* Extension data sub-packet */ | |
657 | || !WPACKET_start_sub_packet_u16(pkt) | |
658 | /* KeyShare list sub-packet */ | |
659 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
c48ffbcc | 660 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 661 | return EXT_RETURN_FAIL; |
ab83e314 MC |
662 | } |
663 | ||
f48d826e | 664 | tls1_get_supported_groups(s, &pgroups, &num_groups); |
ab83e314 MC |
665 | |
666 | /* | |
667 | * TODO(TLS1.3): Make the number of key_shares sent configurable. For | |
668 | * now, just send one | |
669 | */ | |
555cbb32 TS |
670 | if (s->s3.group_id != 0) { |
671 | curve_id = s->s3.group_id; | |
3847d426 | 672 | } else { |
f48d826e | 673 | for (i = 0; i < num_groups; i++) { |
ab83e314 | 674 | |
dbc6268f | 675 | if (!tls_group_allowed(s, pgroups[i], SSL_SECOP_CURVE_SUPPORTED)) |
3847d426 | 676 | continue; |
ab83e314 | 677 | |
f48d826e | 678 | curve_id = pgroups[i]; |
3847d426 | 679 | break; |
ab83e314 | 680 | } |
3847d426 | 681 | } |
ab83e314 | 682 | |
3847d426 | 683 | if (curve_id == 0) { |
c48ffbcc | 684 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_NO_SUITABLE_KEY_SHARE); |
b186a592 | 685 | return EXT_RETURN_FAIL; |
ab83e314 MC |
686 | } |
687 | ||
f63a17d6 MC |
688 | if (!add_key_share(s, pkt, curve_id)) { |
689 | /* SSLfatal() already called */ | |
b186a592 | 690 | return EXT_RETURN_FAIL; |
f63a17d6 | 691 | } |
3847d426 | 692 | |
ab83e314 | 693 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { |
c48ffbcc | 694 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 695 | return EXT_RETURN_FAIL; |
ab83e314 | 696 | } |
b186a592 | 697 | return EXT_RETURN_SENT; |
aa2ed504 TS |
698 | #else |
699 | return EXT_RETURN_NOT_SENT; | |
700 | #endif | |
ab83e314 MC |
701 | } |
702 | ||
b186a592 | 703 | EXT_RETURN tls_construct_ctos_cookie(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 704 | X509 *x, size_t chainidx) |
cfef5027 | 705 | { |
b186a592 | 706 | EXT_RETURN ret = EXT_RETURN_FAIL; |
cfef5027 MC |
707 | |
708 | /* Should only be set if we've had an HRR */ | |
709 | if (s->ext.tls13_cookie_len == 0) | |
b186a592 | 710 | return EXT_RETURN_NOT_SENT; |
cfef5027 MC |
711 | |
712 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_cookie) | |
713 | /* Extension data sub-packet */ | |
714 | || !WPACKET_start_sub_packet_u16(pkt) | |
715 | || !WPACKET_sub_memcpy_u16(pkt, s->ext.tls13_cookie, | |
716 | s->ext.tls13_cookie_len) | |
717 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 718 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
cfef5027 MC |
719 | goto end; |
720 | } | |
721 | ||
b186a592 | 722 | ret = EXT_RETURN_SENT; |
cfef5027 MC |
723 | end: |
724 | OPENSSL_free(s->ext.tls13_cookie); | |
febb0afa | 725 | s->ext.tls13_cookie = NULL; |
cfef5027 MC |
726 | s->ext.tls13_cookie_len = 0; |
727 | ||
728 | return ret; | |
729 | } | |
730 | ||
b186a592 MC |
731 | EXT_RETURN tls_construct_ctos_early_data(SSL *s, WPACKET *pkt, |
732 | unsigned int context, X509 *x, | |
f63a17d6 | 733 | size_t chainidx) |
38df5a45 | 734 | { |
696de86f PW |
735 | #ifndef OPENSSL_NO_PSK |
736 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
737 | #endif /* OPENSSL_NO_PSK */ | |
ccb76685 | 738 | const unsigned char *id = NULL; |
fff202e5 | 739 | size_t idlen = 0; |
add8d0e9 | 740 | SSL_SESSION *psksess = NULL; |
ffc5bbaa | 741 | SSL_SESSION *edsess = NULL; |
add8d0e9 MC |
742 | const EVP_MD *handmd = NULL; |
743 | ||
fc7129dc | 744 | if (s->hello_retry_request == SSL_HRR_PENDING) |
add8d0e9 MC |
745 | handmd = ssl_handshake_md(s); |
746 | ||
747 | if (s->psk_use_session_cb != NULL | |
ffc5bbaa MC |
748 | && (!s->psk_use_session_cb(s, handmd, &id, &idlen, &psksess) |
749 | || (psksess != NULL | |
750 | && psksess->ssl_version != TLS1_3_VERSION))) { | |
751 | SSL_SESSION_free(psksess); | |
c48ffbcc | 752 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_PSK); |
add8d0e9 MC |
753 | return EXT_RETURN_FAIL; |
754 | } | |
755 | ||
c2b290c3 | 756 | #ifndef OPENSSL_NO_PSK |
f3d40db1 MC |
757 | if (psksess == NULL && s->psk_client_callback != NULL) { |
758 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
759 | size_t psklen = 0; | |
760 | ||
761 | memset(identity, 0, sizeof(identity)); | |
762 | psklen = s->psk_client_callback(s, NULL, identity, sizeof(identity) - 1, | |
763 | psk, sizeof(psk)); | |
764 | ||
765 | if (psklen > PSK_MAX_PSK_LEN) { | |
c48ffbcc | 766 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
767 | return EXT_RETURN_FAIL; |
768 | } else if (psklen > 0) { | |
769 | const unsigned char tls13_aes128gcmsha256_id[] = { 0x13, 0x01 }; | |
770 | const SSL_CIPHER *cipher; | |
771 | ||
772 | idlen = strlen(identity); | |
773 | if (idlen > PSK_MAX_IDENTITY_LEN) { | |
c48ffbcc | 774 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
775 | return EXT_RETURN_FAIL; |
776 | } | |
777 | id = (unsigned char *)identity; | |
778 | ||
779 | /* | |
780 | * We found a PSK using an old style callback. We don't know | |
781 | * the digest so we default to SHA256 as per the TLSv1.3 spec | |
782 | */ | |
783 | cipher = SSL_CIPHER_find(s, tls13_aes128gcmsha256_id); | |
784 | if (cipher == NULL) { | |
c48ffbcc | 785 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
786 | return EXT_RETURN_FAIL; |
787 | } | |
788 | ||
789 | psksess = SSL_SESSION_new(); | |
790 | if (psksess == NULL | |
791 | || !SSL_SESSION_set1_master_key(psksess, psk, psklen) | |
792 | || !SSL_SESSION_set_cipher(psksess, cipher) | |
793 | || !SSL_SESSION_set_protocol_version(psksess, TLS1_3_VERSION)) { | |
c48ffbcc | 794 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f3d40db1 MC |
795 | OPENSSL_cleanse(psk, psklen); |
796 | return EXT_RETURN_FAIL; | |
797 | } | |
798 | OPENSSL_cleanse(psk, psklen); | |
799 | } | |
800 | } | |
c2b290c3 | 801 | #endif /* OPENSSL_NO_PSK */ |
f3d40db1 | 802 | |
add8d0e9 MC |
803 | SSL_SESSION_free(s->psksession); |
804 | s->psksession = psksess; | |
805 | if (psksess != NULL) { | |
806 | OPENSSL_free(s->psksession_id); | |
807 | s->psksession_id = OPENSSL_memdup(id, idlen); | |
808 | if (s->psksession_id == NULL) { | |
c48ffbcc | 809 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
add8d0e9 MC |
810 | return EXT_RETURN_FAIL; |
811 | } | |
812 | s->psksession_id_len = idlen; | |
813 | } | |
814 | ||
38df5a45 | 815 | if (s->early_data_state != SSL_EARLY_DATA_CONNECTING |
add8d0e9 MC |
816 | || (s->session->ext.max_early_data == 0 |
817 | && (psksess == NULL || psksess->ext.max_early_data == 0))) { | |
38df5a45 | 818 | s->max_early_data = 0; |
b186a592 | 819 | return EXT_RETURN_NOT_SENT; |
38df5a45 | 820 | } |
ffc5bbaa MC |
821 | edsess = s->session->ext.max_early_data != 0 ? s->session : psksess; |
822 | s->max_early_data = edsess->ext.max_early_data; | |
823 | ||
bfab12bb MC |
824 | if (edsess->ext.hostname != NULL) { |
825 | if (s->ext.hostname == NULL | |
826 | || (s->ext.hostname != NULL | |
827 | && strcmp(s->ext.hostname, edsess->ext.hostname) != 0)) { | |
f63a17d6 | 828 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
f63a17d6 | 829 | SSL_R_INCONSISTENT_EARLY_DATA_SNI); |
bfab12bb MC |
830 | return EXT_RETURN_FAIL; |
831 | } | |
ffc5bbaa MC |
832 | } |
833 | ||
834 | if ((s->ext.alpn == NULL && edsess->ext.alpn_selected != NULL)) { | |
c48ffbcc | 835 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_INCONSISTENT_EARLY_DATA_ALPN); |
ffc5bbaa MC |
836 | return EXT_RETURN_FAIL; |
837 | } | |
838 | ||
839 | /* | |
840 | * Verify that we are offering an ALPN protocol consistent with the early | |
841 | * data. | |
842 | */ | |
843 | if (edsess->ext.alpn_selected != NULL) { | |
844 | PACKET prots, alpnpkt; | |
845 | int found = 0; | |
846 | ||
847 | if (!PACKET_buf_init(&prots, s->ext.alpn, s->ext.alpn_len)) { | |
c48ffbcc | 848 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
ffc5bbaa MC |
849 | return EXT_RETURN_FAIL; |
850 | } | |
851 | while (PACKET_get_length_prefixed_1(&prots, &alpnpkt)) { | |
852 | if (PACKET_equal(&alpnpkt, edsess->ext.alpn_selected, | |
853 | edsess->ext.alpn_selected_len)) { | |
854 | found = 1; | |
855 | break; | |
856 | } | |
857 | } | |
858 | if (!found) { | |
f63a17d6 | 859 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
f63a17d6 | 860 | SSL_R_INCONSISTENT_EARLY_DATA_ALPN); |
ffc5bbaa MC |
861 | return EXT_RETURN_FAIL; |
862 | } | |
863 | } | |
38df5a45 MC |
864 | |
865 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) | |
866 | || !WPACKET_start_sub_packet_u16(pkt) | |
867 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 868 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 869 | return EXT_RETURN_FAIL; |
38df5a45 MC |
870 | } |
871 | ||
872 | /* | |
873 | * We set this to rejected here. Later, if the server acknowledges the | |
874 | * extension, we set it to accepted. | |
875 | */ | |
876 | s->ext.early_data = SSL_EARLY_DATA_REJECTED; | |
4be3a7c7 | 877 | s->ext.early_data_ok = 1; |
38df5a45 | 878 | |
b186a592 | 879 | return EXT_RETURN_SENT; |
38df5a45 MC |
880 | } |
881 | ||
1266eefd MC |
882 | #define F5_WORKAROUND_MIN_MSG_LEN 0xff |
883 | #define F5_WORKAROUND_MAX_MSG_LEN 0x200 | |
884 | ||
d702ad12 MC |
885 | /* |
886 | * PSK pre binder overhead = | |
887 | * 2 bytes for TLSEXT_TYPE_psk | |
888 | * 2 bytes for extension length | |
889 | * 2 bytes for identities list length | |
890 | * 2 bytes for identity length | |
891 | * 4 bytes for obfuscated_ticket_age | |
892 | * 2 bytes for binder list length | |
893 | * 1 byte for binder length | |
894 | * The above excludes the number of bytes for the identity itself and the | |
895 | * subsequent binder bytes | |
896 | */ | |
897 | #define PSK_PRE_BINDER_OVERHEAD (2 + 2 + 2 + 2 + 4 + 2 + 1) | |
898 | ||
b186a592 MC |
899 | EXT_RETURN tls_construct_ctos_padding(SSL *s, WPACKET *pkt, |
900 | unsigned int context, X509 *x, | |
f63a17d6 | 901 | size_t chainidx) |
ab83e314 MC |
902 | { |
903 | unsigned char *padbytes; | |
904 | size_t hlen; | |
905 | ||
906 | if ((s->options & SSL_OP_TLSEXT_PADDING) == 0) | |
b186a592 | 907 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
908 | |
909 | /* | |
d702ad12 MC |
910 | * Add padding to workaround bugs in F5 terminators. See RFC7685. |
911 | * This code calculates the length of all extensions added so far but | |
912 | * excludes the PSK extension (because that MUST be written last). Therefore | |
913 | * this extension MUST always appear second to last. | |
ab83e314 MC |
914 | */ |
915 | if (!WPACKET_get_total_written(pkt, &hlen)) { | |
c48ffbcc | 916 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 917 | return EXT_RETURN_FAIL; |
ab83e314 MC |
918 | } |
919 | ||
d702ad12 MC |
920 | /* |
921 | * If we're going to send a PSK then that will be written out after this | |
922 | * extension, so we need to calculate how long it is going to be. | |
923 | */ | |
924 | if (s->session->ssl_version == TLS1_3_VERSION | |
925 | && s->session->ext.ticklen != 0 | |
926 | && s->session->cipher != NULL) { | |
c8f6c28a | 927 | const EVP_MD *md = ssl_md(s->ctx, s->session->cipher->algorithm2); |
d702ad12 MC |
928 | |
929 | if (md != NULL) { | |
930 | /* | |
931 | * Add the fixed PSK overhead, the identity length and the binder | |
932 | * length. | |
933 | */ | |
934 | hlen += PSK_PRE_BINDER_OVERHEAD + s->session->ext.ticklen | |
935 | + EVP_MD_size(md); | |
936 | } | |
937 | } | |
938 | ||
1266eefd | 939 | if (hlen > F5_WORKAROUND_MIN_MSG_LEN && hlen < F5_WORKAROUND_MAX_MSG_LEN) { |
1ee4b98e | 940 | /* Calculate the amount of padding we need to add */ |
1266eefd MC |
941 | hlen = F5_WORKAROUND_MAX_MSG_LEN - hlen; |
942 | ||
943 | /* | |
944 | * Take off the size of extension header itself (2 bytes for type and | |
10ed1b72 TS |
945 | * 2 bytes for length bytes), but ensure that the extension is at least |
946 | * 1 byte long so as not to have an empty extension last (WebSphere 7.x, | |
947 | * 8.x are intolerant of that condition) | |
1266eefd | 948 | */ |
3d85c7f4 | 949 | if (hlen > 4) |
ab83e314 MC |
950 | hlen -= 4; |
951 | else | |
10ed1b72 | 952 | hlen = 1; |
ab83e314 MC |
953 | |
954 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_padding) | |
955 | || !WPACKET_sub_allocate_bytes_u16(pkt, hlen, &padbytes)) { | |
c48ffbcc | 956 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
eb5fd03b | 957 | return EXT_RETURN_FAIL; |
ab83e314 MC |
958 | } |
959 | memset(padbytes, 0, hlen); | |
960 | } | |
961 | ||
b186a592 | 962 | return EXT_RETURN_SENT; |
ab83e314 MC |
963 | } |
964 | ||
ec15acb6 MC |
965 | /* |
966 | * Construct the pre_shared_key extension | |
967 | */ | |
b186a592 | 968 | EXT_RETURN tls_construct_ctos_psk(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 969 | X509 *x, size_t chainidx) |
ec15acb6 MC |
970 | { |
971 | #ifndef OPENSSL_NO_TLS1_3 | |
15b1688a | 972 | uint32_t now, agesec, agems = 0; |
add8d0e9 | 973 | size_t reshashsize = 0, pskhashsize = 0, binderoffset, msglen; |
9368f865 | 974 | unsigned char *resbinder = NULL, *pskbinder = NULL, *msgstart = NULL; |
15b1688a | 975 | const EVP_MD *handmd = NULL, *mdres = NULL, *mdpsk = NULL; |
9368f865 | 976 | int dores = 0; |
ec15acb6 | 977 | |
c96ce52c | 978 | s->ext.tick_identity = 0; |
ec15acb6 | 979 | |
d702ad12 MC |
980 | /* |
981 | * Note: At this stage of the code we only support adding a single | |
982 | * resumption PSK. If we add support for multiple PSKs then the length | |
983 | * calculations in the padding extension will need to be adjusted. | |
984 | */ | |
985 | ||
ec15acb6 | 986 | /* |
08191294 MC |
987 | * If this is an incompatible or new session then we have nothing to resume |
988 | * so don't add this extension. | |
ec15acb6 | 989 | */ |
08191294 | 990 | if (s->session->ssl_version != TLS1_3_VERSION |
add8d0e9 | 991 | || (s->session->ext.ticklen == 0 && s->psksession == NULL)) |
b186a592 | 992 | return EXT_RETURN_NOT_SENT; |
ec15acb6 | 993 | |
fc7129dc | 994 | if (s->hello_retry_request == SSL_HRR_PENDING) |
9368f865 MC |
995 | handmd = ssl_handshake_md(s); |
996 | ||
9368f865 | 997 | if (s->session->ext.ticklen != 0) { |
72257204 | 998 | /* Get the digest associated with the ciphersuite in the session */ |
9368f865 | 999 | if (s->session->cipher == NULL) { |
c48ffbcc | 1000 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
635c8f77 | 1001 | return EXT_RETURN_FAIL; |
9368f865 | 1002 | } |
c8f6c28a | 1003 | mdres = ssl_md(s->ctx, s->session->cipher->algorithm2); |
9368f865 | 1004 | if (mdres == NULL) { |
72257204 MC |
1005 | /* |
1006 | * Don't recognize this cipher so we can't use the session. | |
1007 | * Ignore it | |
1008 | */ | |
9368f865 MC |
1009 | goto dopsksess; |
1010 | } | |
1011 | ||
fc7129dc | 1012 | if (s->hello_retry_request == SSL_HRR_PENDING && mdres != handmd) { |
9368f865 | 1013 | /* |
72257204 MC |
1014 | * Selected ciphersuite hash does not match the hash for the session |
1015 | * so we can't use it. | |
9368f865 MC |
1016 | */ |
1017 | goto dopsksess; | |
1018 | } | |
1f5b44e9 | 1019 | |
cf3e221b | 1020 | /* |
9368f865 | 1021 | * Technically the C standard just says time() returns a time_t and says |
72257204 MC |
1022 | * nothing about the encoding of that type. In practice most |
1023 | * implementations follow POSIX which holds it as an integral type in | |
1024 | * seconds since epoch. We've already made the assumption that we can do | |
1025 | * this in multiple places in the code, so portability shouldn't be an | |
1026 | * issue. | |
cf3e221b | 1027 | */ |
9368f865 MC |
1028 | now = (uint32_t)time(NULL); |
1029 | agesec = now - (uint32_t)s->session->time; | |
7e70213f MC |
1030 | /* |
1031 | * We calculate the age in seconds but the server may work in ms. Due to | |
1032 | * rounding errors we could overestimate the age by up to 1s. It is | |
1033 | * better to underestimate it. Otherwise, if the RTT is very short, when | |
1034 | * the server calculates the age reported by the client it could be | |
1035 | * bigger than the age calculated on the server - which should never | |
1036 | * happen. | |
1037 | */ | |
1038 | if (agesec > 0) | |
1039 | agesec--; | |
cf3e221b | 1040 | |
9368f865 MC |
1041 | if (s->session->ext.tick_lifetime_hint < agesec) { |
1042 | /* Ticket is too old. Ignore it. */ | |
1043 | goto dopsksess; | |
1044 | } | |
ec15acb6 | 1045 | |
9368f865 MC |
1046 | /* |
1047 | * Calculate age in ms. We're just doing it to nearest second. Should be | |
1048 | * good enough. | |
1049 | */ | |
1050 | agems = agesec * (uint32_t)1000; | |
fc24f0bf | 1051 | |
9368f865 MC |
1052 | if (agesec != 0 && agems / (uint32_t)1000 != agesec) { |
1053 | /* | |
72257204 MC |
1054 | * Overflow. Shouldn't happen unless this is a *really* old session. |
1055 | * If so we just ignore it. | |
9368f865 MC |
1056 | */ |
1057 | goto dopsksess; | |
1058 | } | |
ec15acb6 | 1059 | |
ec15acb6 | 1060 | /* |
72257204 MC |
1061 | * Obfuscate the age. Overflow here is fine, this addition is supposed |
1062 | * to be mod 2^32. | |
ec15acb6 | 1063 | */ |
9368f865 MC |
1064 | agems += s->session->ext.tick_age_add; |
1065 | ||
1066 | reshashsize = EVP_MD_size(mdres); | |
c96ce52c | 1067 | s->ext.tick_identity++; |
9368f865 | 1068 | dores = 1; |
ec15acb6 MC |
1069 | } |
1070 | ||
9368f865 | 1071 | dopsksess: |
add8d0e9 | 1072 | if (!dores && s->psksession == NULL) |
9368f865 | 1073 | return EXT_RETURN_NOT_SENT; |
ec15acb6 | 1074 | |
add8d0e9 | 1075 | if (s->psksession != NULL) { |
c8f6c28a | 1076 | mdpsk = ssl_md(s->ctx, s->psksession->cipher->algorithm2); |
9368f865 MC |
1077 | if (mdpsk == NULL) { |
1078 | /* | |
1079 | * Don't recognize this cipher so we can't use the session. | |
1080 | * If this happens it's an application bug. | |
1081 | */ | |
c48ffbcc | 1082 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_PSK); |
635c8f77 | 1083 | return EXT_RETURN_FAIL; |
9368f865 MC |
1084 | } |
1085 | ||
fc7129dc | 1086 | if (s->hello_retry_request == SSL_HRR_PENDING && mdpsk != handmd) { |
9368f865 MC |
1087 | /* |
1088 | * Selected ciphersuite hash does not match the hash for the PSK | |
1089 | * session. This is an application bug. | |
1090 | */ | |
c48ffbcc | 1091 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_PSK); |
635c8f77 | 1092 | return EXT_RETURN_FAIL; |
9368f865 MC |
1093 | } |
1094 | ||
1095 | pskhashsize = EVP_MD_size(mdpsk); | |
1096 | } | |
ec15acb6 MC |
1097 | |
1098 | /* Create the extension, but skip over the binder for now */ | |
1099 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk) | |
1100 | || !WPACKET_start_sub_packet_u16(pkt) | |
9368f865 | 1101 | || !WPACKET_start_sub_packet_u16(pkt)) { |
c48ffbcc | 1102 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
635c8f77 | 1103 | return EXT_RETURN_FAIL; |
9368f865 MC |
1104 | } |
1105 | ||
1106 | if (dores) { | |
1107 | if (!WPACKET_sub_memcpy_u16(pkt, s->session->ext.tick, | |
1108 | s->session->ext.ticklen) | |
1109 | || !WPACKET_put_bytes_u32(pkt, agems)) { | |
c48ffbcc | 1110 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
635c8f77 | 1111 | return EXT_RETURN_FAIL; |
9368f865 MC |
1112 | } |
1113 | } | |
1114 | ||
add8d0e9 MC |
1115 | if (s->psksession != NULL) { |
1116 | if (!WPACKET_sub_memcpy_u16(pkt, s->psksession_id, | |
1117 | s->psksession_id_len) | |
9368f865 | 1118 | || !WPACKET_put_bytes_u32(pkt, 0)) { |
c48ffbcc | 1119 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
635c8f77 | 1120 | return EXT_RETURN_FAIL; |
9368f865 | 1121 | } |
c96ce52c | 1122 | s->ext.tick_identity++; |
9368f865 MC |
1123 | } |
1124 | ||
1125 | if (!WPACKET_close(pkt) | |
ec15acb6 MC |
1126 | || !WPACKET_get_total_written(pkt, &binderoffset) |
1127 | || !WPACKET_start_sub_packet_u16(pkt) | |
9368f865 MC |
1128 | || (dores |
1129 | && !WPACKET_sub_allocate_bytes_u8(pkt, reshashsize, &resbinder)) | |
add8d0e9 | 1130 | || (s->psksession != NULL |
9368f865 | 1131 | && !WPACKET_sub_allocate_bytes_u8(pkt, pskhashsize, &pskbinder)) |
ec15acb6 MC |
1132 | || !WPACKET_close(pkt) |
1133 | || !WPACKET_close(pkt) | |
1134 | || !WPACKET_get_total_written(pkt, &msglen) | |
1135 | /* | |
1136 | * We need to fill in all the sub-packet lengths now so we can | |
1137 | * calculate the HMAC of the message up to the binders | |
1138 | */ | |
1139 | || !WPACKET_fill_lengths(pkt)) { | |
c48ffbcc | 1140 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
635c8f77 | 1141 | return EXT_RETURN_FAIL; |
ec15acb6 MC |
1142 | } |
1143 | ||
1144 | msgstart = WPACKET_get_curr(pkt) - msglen; | |
1145 | ||
72257204 MC |
1146 | if (dores |
1147 | && tls_psk_do_binder(s, mdres, msgstart, binderoffset, NULL, | |
1148 | resbinder, s->session, 1, 0) != 1) { | |
635c8f77 MC |
1149 | /* SSLfatal() already called */ |
1150 | return EXT_RETURN_FAIL; | |
ec15acb6 MC |
1151 | } |
1152 | ||
add8d0e9 | 1153 | if (s->psksession != NULL |
72257204 | 1154 | && tls_psk_do_binder(s, mdpsk, msgstart, binderoffset, NULL, |
add8d0e9 | 1155 | pskbinder, s->psksession, 1, 1) != 1) { |
635c8f77 MC |
1156 | /* SSLfatal() already called */ |
1157 | return EXT_RETURN_FAIL; | |
9368f865 MC |
1158 | } |
1159 | ||
635c8f77 | 1160 | return EXT_RETURN_SENT; |
ec15acb6 | 1161 | #else |
89bc9cf6 | 1162 | return EXT_RETURN_NOT_SENT; |
ec15acb6 MC |
1163 | #endif |
1164 | } | |
1165 | ||
9d75dce3 | 1166 | EXT_RETURN tls_construct_ctos_post_handshake_auth(SSL *s, WPACKET *pkt, |
a7e6a3d8 P |
1167 | ossl_unused unsigned int context, |
1168 | ossl_unused X509 *x, | |
1169 | ossl_unused size_t chainidx) | |
9d75dce3 TS |
1170 | { |
1171 | #ifndef OPENSSL_NO_TLS1_3 | |
32097b33 MC |
1172 | if (!s->pha_enabled) |
1173 | return EXT_RETURN_NOT_SENT; | |
9d75dce3 TS |
1174 | |
1175 | /* construct extension - 0 length, no contents */ | |
1176 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_post_handshake_auth) | |
1177 | || !WPACKET_start_sub_packet_u16(pkt) | |
1178 | || !WPACKET_close(pkt)) { | |
c48ffbcc | 1179 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
9d75dce3 TS |
1180 | return EXT_RETURN_FAIL; |
1181 | } | |
1182 | ||
1183 | s->post_handshake_auth = SSL_PHA_EXT_SENT; | |
1184 | ||
1185 | return EXT_RETURN_SENT; | |
1186 | #else | |
1187 | return EXT_RETURN_NOT_SENT; | |
1188 | #endif | |
1189 | } | |
1190 | ||
1191 | ||
6dd083fd MC |
1192 | /* |
1193 | * Parse the server's renegotiation binding and abort if it's not right | |
1194 | */ | |
61138358 | 1195 | int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 1196 | X509 *x, size_t chainidx) |
6dd083fd | 1197 | { |
555cbb32 TS |
1198 | size_t expected_len = s->s3.previous_client_finished_len |
1199 | + s->s3.previous_server_finished_len; | |
6dd083fd MC |
1200 | size_t ilen; |
1201 | const unsigned char *data; | |
1202 | ||
1203 | /* Check for logic errors */ | |
b77f3ed1 | 1204 | if (!ossl_assert(expected_len == 0 |
555cbb32 | 1205 | || s->s3.previous_client_finished_len != 0) |
b77f3ed1 | 1206 | || !ossl_assert(expected_len == 0 |
555cbb32 | 1207 | || s->s3.previous_server_finished_len != 0)) { |
c48ffbcc | 1208 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b77f3ed1 MC |
1209 | return 0; |
1210 | } | |
6dd083fd MC |
1211 | |
1212 | /* Parse the length byte */ | |
1213 | if (!PACKET_get_1_len(pkt, &ilen)) { | |
c48ffbcc | 1214 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_RENEGOTIATION_ENCODING_ERR); |
6dd083fd MC |
1215 | return 0; |
1216 | } | |
1217 | ||
1218 | /* Consistency check */ | |
1219 | if (PACKET_remaining(pkt) != ilen) { | |
c48ffbcc | 1220 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_RENEGOTIATION_ENCODING_ERR); |
6dd083fd MC |
1221 | return 0; |
1222 | } | |
1223 | ||
1224 | /* Check that the extension matches */ | |
1225 | if (ilen != expected_len) { | |
c48ffbcc | 1226 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_RENEGOTIATION_MISMATCH); |
6dd083fd MC |
1227 | return 0; |
1228 | } | |
1229 | ||
555cbb32 TS |
1230 | if (!PACKET_get_bytes(pkt, &data, s->s3.previous_client_finished_len) |
1231 | || memcmp(data, s->s3.previous_client_finished, | |
1232 | s->s3.previous_client_finished_len) != 0) { | |
c48ffbcc | 1233 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_RENEGOTIATION_MISMATCH); |
6dd083fd MC |
1234 | return 0; |
1235 | } | |
1236 | ||
555cbb32 TS |
1237 | if (!PACKET_get_bytes(pkt, &data, s->s3.previous_server_finished_len) |
1238 | || memcmp(data, s->s3.previous_server_finished, | |
1239 | s->s3.previous_server_finished_len) != 0) { | |
c48ffbcc | 1240 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_RENEGOTIATION_MISMATCH); |
6dd083fd MC |
1241 | return 0; |
1242 | } | |
555cbb32 | 1243 | s->s3.send_connection_binding = 1; |
6dd083fd MC |
1244 | |
1245 | return 1; | |
1246 | } | |
1247 | ||
cf72c757 F |
1248 | /* Parse the server's max fragment len extension packet */ |
1249 | int tls_parse_stoc_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context, | |
f63a17d6 | 1250 | X509 *x, size_t chainidx) |
cf72c757 F |
1251 | { |
1252 | unsigned int value; | |
1253 | ||
1254 | if (PACKET_remaining(pkt) != 1 || !PACKET_get_1(pkt, &value)) { | |
c48ffbcc | 1255 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
cf72c757 F |
1256 | return 0; |
1257 | } | |
1258 | ||
1259 | /* |value| should contains a valid max-fragment-length code. */ | |
1260 | if (!IS_MAX_FRAGMENT_LENGTH_EXT_VALID(value)) { | |
f63a17d6 | 1261 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 | 1262 | SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); |
cf72c757 F |
1263 | return 0; |
1264 | } | |
1265 | ||
1266 | /* Must be the same value as client-configured one who was sent to server */ | |
1267 | /*- | |
1268 | * RFC 6066: if a client receives a maximum fragment length negotiation | |
1269 | * response that differs from the length it requested, ... | |
1270 | * It must abort with SSL_AD_ILLEGAL_PARAMETER alert | |
1271 | */ | |
1272 | if (value != s->ext.max_fragment_len_mode) { | |
f63a17d6 | 1273 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 | 1274 | SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); |
cf72c757 F |
1275 | return 0; |
1276 | } | |
1277 | ||
1278 | /* | |
1279 | * Maximum Fragment Length Negotiation succeeded. | |
1280 | * The negotiated Maximum Fragment Length is binding now. | |
1281 | */ | |
1282 | s->session->ext.max_fragment_len_mode = value; | |
1283 | ||
1284 | return 1; | |
1285 | } | |
1286 | ||
61138358 | 1287 | int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 1288 | X509 *x, size_t chainidx) |
6dd083fd | 1289 | { |
fb34a0f4 | 1290 | if (s->ext.hostname == NULL) { |
c48ffbcc | 1291 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
fb34a0f4 MC |
1292 | return 0; |
1293 | } | |
1294 | ||
1295 | if (PACKET_remaining(pkt) > 0) { | |
c48ffbcc | 1296 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
6dd083fd MC |
1297 | return 0; |
1298 | } | |
1299 | ||
1300 | if (!s->hit) { | |
aff8c126 | 1301 | if (s->session->ext.hostname != NULL) { |
c48ffbcc | 1302 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1303 | return 0; |
1304 | } | |
aff8c126 RS |
1305 | s->session->ext.hostname = OPENSSL_strdup(s->ext.hostname); |
1306 | if (s->session->ext.hostname == NULL) { | |
c48ffbcc | 1307 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1308 | return 0; |
1309 | } | |
1310 | } | |
1311 | ||
1312 | return 1; | |
1313 | } | |
1314 | ||
1315 | #ifndef OPENSSL_NO_EC | |
61138358 | 1316 | int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 1317 | X509 *x, size_t chainidx) |
6dd083fd | 1318 | { |
848a950b | 1319 | size_t ecpointformats_len; |
6dd083fd MC |
1320 | PACKET ecptformatlist; |
1321 | ||
1322 | if (!PACKET_as_length_prefixed_1(pkt, &ecptformatlist)) { | |
c48ffbcc | 1323 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
6dd083fd MC |
1324 | return 0; |
1325 | } | |
1326 | if (!s->hit) { | |
aff8c126 | 1327 | ecpointformats_len = PACKET_remaining(&ecptformatlist); |
848a950b | 1328 | if (ecpointformats_len == 0) { |
c48ffbcc | 1329 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_LENGTH); |
848a950b MC |
1330 | return 0; |
1331 | } | |
6dd083fd | 1332 | |
cd0fb43c MC |
1333 | s->ext.peer_ecpointformats_len = 0; |
1334 | OPENSSL_free(s->ext.peer_ecpointformats); | |
1335 | s->ext.peer_ecpointformats = OPENSSL_malloc(ecpointformats_len); | |
1336 | if (s->ext.peer_ecpointformats == NULL) { | |
c48ffbcc | 1337 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1338 | return 0; |
1339 | } | |
1340 | ||
cd0fb43c | 1341 | s->ext.peer_ecpointformats_len = ecpointformats_len; |
6dd083fd MC |
1342 | |
1343 | if (!PACKET_copy_bytes(&ecptformatlist, | |
cd0fb43c | 1344 | s->ext.peer_ecpointformats, |
aff8c126 | 1345 | ecpointformats_len)) { |
c48ffbcc | 1346 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1347 | return 0; |
1348 | } | |
1349 | } | |
1350 | ||
1351 | return 1; | |
1352 | } | |
1353 | #endif | |
1354 | ||
61138358 | 1355 | int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 1356 | X509 *x, size_t chainidx) |
6dd083fd | 1357 | { |
aff8c126 RS |
1358 | if (s->ext.session_ticket_cb != NULL && |
1359 | !s->ext.session_ticket_cb(s, PACKET_data(pkt), | |
1360 | PACKET_remaining(pkt), | |
1361 | s->ext.session_ticket_cb_arg)) { | |
c48ffbcc | 1362 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_BAD_EXTENSION); |
6dd083fd MC |
1363 | return 0; |
1364 | } | |
1266eefd | 1365 | |
fb34a0f4 | 1366 | if (!tls_use_ticket(s)) { |
c48ffbcc | 1367 | SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION, SSL_R_BAD_EXTENSION); |
6dd083fd MC |
1368 | return 0; |
1369 | } | |
fb34a0f4 | 1370 | if (PACKET_remaining(pkt) > 0) { |
c48ffbcc | 1371 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
fb34a0f4 MC |
1372 | return 0; |
1373 | } | |
1266eefd | 1374 | |
aff8c126 | 1375 | s->ext.ticket_expected = 1; |
6dd083fd MC |
1376 | |
1377 | return 1; | |
1378 | } | |
1379 | ||
ab83e314 | 1380 | #ifndef OPENSSL_NO_OCSP |
61138358 | 1381 | int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 1382 | X509 *x, size_t chainidx) |
6dd083fd | 1383 | { |
5de683d2 MC |
1384 | if (context == SSL_EXT_TLS1_3_CERTIFICATE_REQUEST) { |
1385 | /* We ignore this if the server sends a CertificateRequest */ | |
1386 | /* TODO(TLS1.3): Add support for this */ | |
1387 | return 1; | |
1388 | } | |
1389 | ||
6dd083fd | 1390 | /* |
f63e4288 MC |
1391 | * MUST only be sent if we've requested a status |
1392 | * request message. In TLS <= 1.2 it must also be empty. | |
6dd083fd | 1393 | */ |
fb34a0f4 | 1394 | if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) { |
c48ffbcc | 1395 | SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION, SSL_R_BAD_EXTENSION); |
6dd083fd MC |
1396 | return 0; |
1397 | } | |
fb34a0f4 | 1398 | if (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) > 0) { |
c48ffbcc | 1399 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
fb34a0f4 MC |
1400 | return 0; |
1401 | } | |
f63e4288 MC |
1402 | |
1403 | if (SSL_IS_TLS13(s)) { | |
1404 | /* We only know how to handle this if it's for the first Certificate in | |
1ee4b98e | 1405 | * the chain. We ignore any other responses. |
f63e4288 | 1406 | */ |
8521ced6 | 1407 | if (chainidx != 0) |
f63e4288 | 1408 | return 1; |
f63a17d6 MC |
1409 | |
1410 | /* SSLfatal() already called */ | |
1411 | return tls_process_cert_status_body(s, pkt); | |
f63e4288 MC |
1412 | } |
1413 | ||
6dd083fd | 1414 | /* Set flag to expect CertificateStatus message */ |
aff8c126 | 1415 | s->ext.status_expected = 1; |
6dd083fd MC |
1416 | |
1417 | return 1; | |
1418 | } | |
ab83e314 | 1419 | #endif |
6dd083fd MC |
1420 | |
1421 | ||
1422 | #ifndef OPENSSL_NO_CT | |
61138358 | 1423 | int tls_parse_stoc_sct(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1424 | size_t chainidx) |
6dd083fd | 1425 | { |
5de683d2 MC |
1426 | if (context == SSL_EXT_TLS1_3_CERTIFICATE_REQUEST) { |
1427 | /* We ignore this if the server sends it in a CertificateRequest */ | |
1428 | /* TODO(TLS1.3): Add support for this */ | |
1429 | return 1; | |
1430 | } | |
1431 | ||
6dd083fd MC |
1432 | /* |
1433 | * Only take it if we asked for it - i.e if there is no CT validation | |
1434 | * callback set, then a custom extension MAY be processing it, so we | |
1435 | * need to let control continue to flow to that. | |
1436 | */ | |
1437 | if (s->ct_validation_callback != NULL) { | |
1438 | size_t size = PACKET_remaining(pkt); | |
1439 | ||
1440 | /* Simply copy it off for later processing */ | |
aff8c126 RS |
1441 | OPENSSL_free(s->ext.scts); |
1442 | s->ext.scts = NULL; | |
1266eefd | 1443 | |
3a63c0ed | 1444 | s->ext.scts_len = (uint16_t)size; |
6dd083fd | 1445 | if (size > 0) { |
aff8c126 RS |
1446 | s->ext.scts = OPENSSL_malloc(size); |
1447 | if (s->ext.scts == NULL | |
1448 | || !PACKET_copy_bytes(pkt, s->ext.scts, size)) { | |
c48ffbcc | 1449 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1450 | return 0; |
1451 | } | |
1452 | } | |
1453 | } else { | |
b186a592 MC |
1454 | ENDPOINT role = (context & SSL_EXT_TLS1_2_SERVER_HELLO) != 0 |
1455 | ? ENDPOINT_CLIENT : ENDPOINT_BOTH; | |
1456 | ||
1457 | /* | |
1458 | * If we didn't ask for it then there must be a custom extension, | |
1459 | * otherwise this is unsolicited. | |
1460 | */ | |
1461 | if (custom_ext_find(&s->cert->custext, role, | |
1462 | TLSEXT_TYPE_signed_certificate_timestamp, | |
1463 | NULL) == NULL) { | |
c48ffbcc | 1464 | SSLfatal(s, TLS1_AD_UNSUPPORTED_EXTENSION, SSL_R_BAD_EXTENSION); |
b186a592 MC |
1465 | return 0; |
1466 | } | |
1467 | ||
f63a17d6 | 1468 | if (!custom_ext_parse(s, context, |
43ae5eed MC |
1469 | TLSEXT_TYPE_signed_certificate_timestamp, |
1470 | PACKET_data(pkt), PACKET_remaining(pkt), | |
f63a17d6 MC |
1471 | x, chainidx)) { |
1472 | /* SSLfatal already called */ | |
6dd083fd | 1473 | return 0; |
f63a17d6 | 1474 | } |
6dd083fd MC |
1475 | } |
1476 | ||
1477 | return 1; | |
1478 | } | |
1479 | #endif | |
1480 | ||
1481 | ||
1482 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
1483 | /* | |
1484 | * ssl_next_proto_validate validates a Next Protocol Negotiation block. No | |
1485 | * elements of zero length are allowed and the set of elements must exactly | |
1486 | * fill the length of the block. Returns 1 on success or 0 on failure. | |
1487 | */ | |
f63a17d6 | 1488 | static int ssl_next_proto_validate(SSL *s, PACKET *pkt) |
6dd083fd MC |
1489 | { |
1490 | PACKET tmp_protocol; | |
1491 | ||
1492 | while (PACKET_remaining(pkt)) { | |
1493 | if (!PACKET_get_length_prefixed_1(pkt, &tmp_protocol) | |
f63a17d6 | 1494 | || PACKET_remaining(&tmp_protocol) == 0) { |
c48ffbcc | 1495 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
6dd083fd | 1496 | return 0; |
f63a17d6 | 1497 | } |
6dd083fd MC |
1498 | } |
1499 | ||
1500 | return 1; | |
1501 | } | |
1502 | ||
61138358 | 1503 | int tls_parse_stoc_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1504 | size_t chainidx) |
6dd083fd MC |
1505 | { |
1506 | unsigned char *selected; | |
1507 | unsigned char selected_len; | |
1508 | PACKET tmppkt; | |
1509 | ||
1266eefd | 1510 | /* Check if we are in a renegotiation. If so ignore this extension */ |
c7f47786 | 1511 | if (!SSL_IS_FIRST_HANDSHAKE(s)) |
6dd083fd MC |
1512 | return 1; |
1513 | ||
1514 | /* We must have requested it. */ | |
aff8c126 | 1515 | if (s->ctx->ext.npn_select_cb == NULL) { |
c48ffbcc | 1516 | SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION, SSL_R_BAD_EXTENSION); |
6dd083fd MC |
1517 | return 0; |
1518 | } | |
1266eefd | 1519 | |
6dd083fd MC |
1520 | /* The data must be valid */ |
1521 | tmppkt = *pkt; | |
f63a17d6 MC |
1522 | if (!ssl_next_proto_validate(s, &tmppkt)) { |
1523 | /* SSLfatal() already called */ | |
6dd083fd MC |
1524 | return 0; |
1525 | } | |
aff8c126 RS |
1526 | if (s->ctx->ext.npn_select_cb(s, &selected, &selected_len, |
1527 | PACKET_data(pkt), | |
1528 | PACKET_remaining(pkt), | |
1529 | s->ctx->ext.npn_select_cb_arg) != | |
6dd083fd | 1530 | SSL_TLSEXT_ERR_OK) { |
c48ffbcc | 1531 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_BAD_EXTENSION); |
6dd083fd MC |
1532 | return 0; |
1533 | } | |
1266eefd | 1534 | |
6dd083fd MC |
1535 | /* |
1536 | * Could be non-NULL if server has sent multiple NPN extensions in | |
1537 | * a single Serverhello | |
1538 | */ | |
aff8c126 RS |
1539 | OPENSSL_free(s->ext.npn); |
1540 | s->ext.npn = OPENSSL_malloc(selected_len); | |
1541 | if (s->ext.npn == NULL) { | |
c48ffbcc | 1542 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1543 | return 0; |
1544 | } | |
1545 | ||
aff8c126 RS |
1546 | memcpy(s->ext.npn, selected, selected_len); |
1547 | s->ext.npn_len = selected_len; | |
555cbb32 | 1548 | s->s3.npn_seen = 1; |
6dd083fd MC |
1549 | |
1550 | return 1; | |
1551 | } | |
1552 | #endif | |
1553 | ||
61138358 | 1554 | int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1555 | size_t chainidx) |
6dd083fd MC |
1556 | { |
1557 | size_t len; | |
1558 | ||
1559 | /* We must have requested it. */ | |
555cbb32 | 1560 | if (!s->s3.alpn_sent) { |
c48ffbcc | 1561 | SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION, SSL_R_BAD_EXTENSION); |
6dd083fd MC |
1562 | return 0; |
1563 | } | |
1564 | /*- | |
1565 | * The extension data consists of: | |
1566 | * uint16 list_length | |
1567 | * uint8 proto_length; | |
1568 | * uint8 proto[proto_length]; | |
1569 | */ | |
1570 | if (!PACKET_get_net_2_len(pkt, &len) | |
1571 | || PACKET_remaining(pkt) != len || !PACKET_get_1_len(pkt, &len) | |
1572 | || PACKET_remaining(pkt) != len) { | |
c48ffbcc | 1573 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
6dd083fd MC |
1574 | return 0; |
1575 | } | |
555cbb32 TS |
1576 | OPENSSL_free(s->s3.alpn_selected); |
1577 | s->s3.alpn_selected = OPENSSL_malloc(len); | |
1578 | if (s->s3.alpn_selected == NULL) { | |
c48ffbcc | 1579 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1580 | return 0; |
1581 | } | |
555cbb32 | 1582 | if (!PACKET_copy_bytes(pkt, s->s3.alpn_selected, len)) { |
c48ffbcc | 1583 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
6dd083fd MC |
1584 | return 0; |
1585 | } | |
555cbb32 | 1586 | s->s3.alpn_selected_len = len; |
6dd083fd | 1587 | |
0ef28021 MC |
1588 | if (s->session->ext.alpn_selected == NULL |
1589 | || s->session->ext.alpn_selected_len != len | |
555cbb32 | 1590 | || memcmp(s->session->ext.alpn_selected, s->s3.alpn_selected, len) |
0ef28021 | 1591 | != 0) { |
4be3a7c7 MC |
1592 | /* ALPN not consistent with the old session so cannot use early_data */ |
1593 | s->ext.early_data_ok = 0; | |
1594 | } | |
1595 | if (!s->hit) { | |
9d5db9c9 MC |
1596 | /* |
1597 | * This is a new session and so alpn_selected should have been | |
1598 | * initialised to NULL. We should update it with the selected ALPN. | |
1599 | */ | |
1600 | if (!ossl_assert(s->session->ext.alpn_selected == NULL)) { | |
c48ffbcc | 1601 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
9d5db9c9 MC |
1602 | return 0; |
1603 | } | |
4be3a7c7 | 1604 | s->session->ext.alpn_selected = |
555cbb32 | 1605 | OPENSSL_memdup(s->s3.alpn_selected, s->s3.alpn_selected_len); |
4be3a7c7 | 1606 | if (s->session->ext.alpn_selected == NULL) { |
c48ffbcc | 1607 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
4be3a7c7 MC |
1608 | return 0; |
1609 | } | |
555cbb32 | 1610 | s->session->ext.alpn_selected_len = s->s3.alpn_selected_len; |
ae8d7d99 MC |
1611 | } |
1612 | ||
6dd083fd MC |
1613 | return 1; |
1614 | } | |
1615 | ||
1616 | #ifndef OPENSSL_NO_SRTP | |
61138358 | 1617 | int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1618 | size_t chainidx) |
6dd083fd MC |
1619 | { |
1620 | unsigned int id, ct, mki; | |
1621 | int i; | |
1622 | STACK_OF(SRTP_PROTECTION_PROFILE) *clnt; | |
1623 | SRTP_PROTECTION_PROFILE *prof; | |
1624 | ||
1266eefd MC |
1625 | if (!PACKET_get_net_2(pkt, &ct) || ct != 2 |
1626 | || !PACKET_get_net_2(pkt, &id) | |
1627 | || !PACKET_get_1(pkt, &mki) | |
1628 | || PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 1629 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
f63a17d6 | 1630 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
6dd083fd MC |
1631 | return 0; |
1632 | } | |
1633 | ||
1634 | if (mki != 0) { | |
1635 | /* Must be no MKI, since we never offer one */ | |
c48ffbcc | 1636 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_SRTP_MKI_VALUE); |
6dd083fd MC |
1637 | return 0; |
1638 | } | |
1639 | ||
6dd083fd | 1640 | /* Throw an error if the server gave us an unsolicited extension */ |
1266eefd | 1641 | clnt = SSL_get_srtp_profiles(s); |
6dd083fd | 1642 | if (clnt == NULL) { |
c48ffbcc | 1643 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_NO_SRTP_PROFILES); |
6dd083fd MC |
1644 | return 0; |
1645 | } | |
1646 | ||
1647 | /* | |
1648 | * Check to see if the server gave us something we support (and | |
1649 | * presumably offered) | |
1650 | */ | |
1651 | for (i = 0; i < sk_SRTP_PROTECTION_PROFILE_num(clnt); i++) { | |
1652 | prof = sk_SRTP_PROTECTION_PROFILE_value(clnt, i); | |
1653 | ||
1654 | if (prof->id == id) { | |
1655 | s->srtp_profile = prof; | |
6dd083fd MC |
1656 | return 1; |
1657 | } | |
1658 | } | |
1659 | ||
c48ffbcc | 1660 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
f63a17d6 | 1661 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
6dd083fd MC |
1662 | return 0; |
1663 | } | |
1664 | #endif | |
1665 | ||
61138358 | 1666 | int tls_parse_stoc_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1667 | size_t chainidx) |
6dd083fd MC |
1668 | { |
1669 | /* Ignore if inappropriate ciphersuite */ | |
1670 | if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC) | |
555cbb32 TS |
1671 | && s->s3.tmp.new_cipher->algorithm_mac != SSL_AEAD |
1672 | && s->s3.tmp.new_cipher->algorithm_enc != SSL_RC4) | |
28a31a0a | 1673 | s->ext.use_etm = 1; |
6dd083fd MC |
1674 | |
1675 | return 1; | |
1676 | } | |
1677 | ||
61138358 | 1678 | int tls_parse_stoc_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1679 | size_t chainidx) |
6dd083fd | 1680 | { |
088dfa13 TS |
1681 | if (s->options & SSL_OP_NO_EXTENDED_MASTER_SECRET) |
1682 | return 1; | |
555cbb32 | 1683 | s->s3.flags |= TLS1_FLAGS_RECEIVED_EXTMS; |
6dd083fd MC |
1684 | if (!s->hit) |
1685 | s->session->flags |= SSL_SESS_FLAG_EXTMS; | |
1686 | ||
1687 | return 1; | |
1688 | } | |
1689 | ||
88050dd1 MC |
1690 | int tls_parse_stoc_supported_versions(SSL *s, PACKET *pkt, unsigned int context, |
1691 | X509 *x, size_t chainidx) | |
1692 | { | |
1693 | unsigned int version; | |
1694 | ||
1695 | if (!PACKET_get_net_2(pkt, &version) | |
1696 | || PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 1697 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
88050dd1 MC |
1698 | return 0; |
1699 | } | |
1700 | ||
27e462f1 MC |
1701 | /* |
1702 | * The only protocol version we support which is valid in this extension in | |
1703 | * a ServerHello is TLSv1.3 therefore we shouldn't be getting anything else. | |
1704 | */ | |
1705 | if (version != TLS1_3_VERSION) { | |
1706 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, | |
27e462f1 MC |
1707 | SSL_R_BAD_PROTOCOL_VERSION_NUMBER); |
1708 | return 0; | |
1709 | } | |
1710 | ||
426dfc9f | 1711 | /* We ignore this extension for HRRs except to sanity check it */ |
27e462f1 | 1712 | if (context == SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST) |
426dfc9f | 1713 | return 1; |
426dfc9f | 1714 | |
88050dd1 MC |
1715 | /* We just set it here. We validate it in ssl_choose_client_version */ |
1716 | s->version = version; | |
1717 | ||
1718 | return 1; | |
1719 | } | |
1720 | ||
61138358 | 1721 | int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1722 | size_t chainidx) |
6dd083fd | 1723 | { |
3cf96e88 | 1724 | #ifndef OPENSSL_NO_TLS1_3 |
6dd083fd MC |
1725 | unsigned int group_id; |
1726 | PACKET encoded_pt; | |
555cbb32 | 1727 | EVP_PKEY *ckey = s->s3.tmp.pkey, *skey = NULL; |
a011b586 | 1728 | const TLS_GROUP_INFO *ginf = NULL; |
6dd083fd MC |
1729 | |
1730 | /* Sanity check */ | |
555cbb32 | 1731 | if (ckey == NULL || s->s3.peer_tmp != NULL) { |
c48ffbcc | 1732 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1733 | return 0; |
1734 | } | |
1735 | ||
1736 | if (!PACKET_get_net_2(pkt, &group_id)) { | |
c48ffbcc | 1737 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
6dd083fd MC |
1738 | return 0; |
1739 | } | |
1740 | ||
fe874d27 | 1741 | if ((context & SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST) != 0) { |
f48d826e DSH |
1742 | const uint16_t *pgroups = NULL; |
1743 | size_t i, num_groups; | |
3847d426 MC |
1744 | |
1745 | if (PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 1746 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
3847d426 MC |
1747 | return 0; |
1748 | } | |
1749 | ||
1750 | /* | |
1751 | * It is an error if the HelloRetryRequest wants a key_share that we | |
1752 | * already sent in the first ClientHello | |
1753 | */ | |
555cbb32 | 1754 | if (group_id == s->s3.group_id) { |
c48ffbcc | 1755 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_KEY_SHARE); |
3847d426 MC |
1756 | return 0; |
1757 | } | |
1758 | ||
1759 | /* Validate the selected group is one we support */ | |
f48d826e DSH |
1760 | tls1_get_supported_groups(s, &pgroups, &num_groups); |
1761 | for (i = 0; i < num_groups; i++) { | |
1762 | if (group_id == pgroups[i]) | |
3847d426 MC |
1763 | break; |
1764 | } | |
f48d826e | 1765 | if (i >= num_groups |
dbc6268f | 1766 | || !tls_group_allowed(s, group_id, SSL_SECOP_CURVE_SUPPORTED)) { |
c48ffbcc | 1767 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_KEY_SHARE); |
3847d426 MC |
1768 | return 0; |
1769 | } | |
1770 | ||
555cbb32 TS |
1771 | s->s3.group_id = group_id; |
1772 | EVP_PKEY_free(s->s3.tmp.pkey); | |
1773 | s->s3.tmp.pkey = NULL; | |
3847d426 MC |
1774 | return 1; |
1775 | } | |
1776 | ||
555cbb32 | 1777 | if (group_id != s->s3.group_id) { |
6dd083fd MC |
1778 | /* |
1779 | * This isn't for the group that we sent in the original | |
1780 | * key_share! | |
1781 | */ | |
c48ffbcc | 1782 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_KEY_SHARE); |
6dd083fd MC |
1783 | return 0; |
1784 | } | |
1785 | ||
a011b586 | 1786 | if ((ginf = tls1_group_id_lookup(s->ctx, group_id)) == NULL) { |
c48ffbcc | 1787 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_KEY_SHARE); |
a011b586 NT |
1788 | return 0; |
1789 | } | |
1790 | ||
6dd083fd MC |
1791 | if (!PACKET_as_length_prefixed_2(pkt, &encoded_pt) |
1792 | || PACKET_remaining(&encoded_pt) == 0) { | |
c48ffbcc | 1793 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
6dd083fd MC |
1794 | return 0; |
1795 | } | |
1796 | ||
a011b586 NT |
1797 | if (!ginf->is_kem) { |
1798 | /* Regular KEX */ | |
1799 | skey = EVP_PKEY_new(); | |
1800 | if (skey == NULL || EVP_PKEY_copy_parameters(skey, ckey) <= 0) { | |
c48ffbcc | 1801 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_COPY_PARAMETERS_FAILED); |
a011b586 NT |
1802 | return 0; |
1803 | } | |
afce590b | 1804 | |
5ac8fb58 MC |
1805 | if (EVP_PKEY_set1_encoded_public_key(skey, PACKET_data(&encoded_pt), |
1806 | PACKET_remaining(&encoded_pt)) <= 0) { | |
c48ffbcc | 1807 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_ECPOINT); |
a011b586 NT |
1808 | EVP_PKEY_free(skey); |
1809 | return 0; | |
1810 | } | |
6dd083fd | 1811 | |
a011b586 NT |
1812 | if (ssl_derive(s, ckey, skey, 1) == 0) { |
1813 | /* SSLfatal() already called */ | |
1814 | EVP_PKEY_free(skey); | |
1815 | return 0; | |
1816 | } | |
1817 | s->s3.peer_tmp = skey; | |
1818 | } else { | |
1819 | /* KEM Mode */ | |
1820 | const unsigned char *ct = PACKET_data(&encoded_pt); | |
1821 | size_t ctlen = PACKET_remaining(&encoded_pt); | |
1822 | ||
1823 | if (ssl_decapsulate(s, ckey, ct, ctlen, 1) == 0) { | |
1824 | /* SSLfatal() already called */ | |
1825 | return 0; | |
1826 | } | |
6dd083fd | 1827 | } |
3cf96e88 | 1828 | #endif |
6dd083fd MC |
1829 | |
1830 | return 1; | |
1831 | } | |
4ff65f77 | 1832 | |
cfef5027 | 1833 | int tls_parse_stoc_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1834 | size_t chainidx) |
cfef5027 MC |
1835 | { |
1836 | PACKET cookie; | |
1837 | ||
1838 | if (!PACKET_as_length_prefixed_2(pkt, &cookie) | |
1839 | || !PACKET_memdup(&cookie, &s->ext.tls13_cookie, | |
1840 | &s->ext.tls13_cookie_len)) { | |
c48ffbcc | 1841 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
cfef5027 MC |
1842 | return 0; |
1843 | } | |
1844 | ||
1845 | return 1; | |
1846 | } | |
1847 | ||
38df5a45 | 1848 | int tls_parse_stoc_early_data(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 1849 | X509 *x, size_t chainidx) |
38df5a45 | 1850 | { |
fe874d27 | 1851 | if (context == SSL_EXT_TLS1_3_NEW_SESSION_TICKET) { |
6594189f MC |
1852 | unsigned long max_early_data; |
1853 | ||
1854 | if (!PACKET_get_net_4(pkt, &max_early_data) | |
1855 | || PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 1856 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_INVALID_MAX_EARLY_DATA); |
6594189f MC |
1857 | return 0; |
1858 | } | |
1859 | ||
1860 | s->session->ext.max_early_data = max_early_data; | |
1861 | ||
1862 | return 1; | |
1863 | } | |
1864 | ||
38df5a45 | 1865 | if (PACKET_remaining(pkt) != 0) { |
c48ffbcc | 1866 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
38df5a45 MC |
1867 | return 0; |
1868 | } | |
1869 | ||
4be3a7c7 | 1870 | if (!s->ext.early_data_ok |
c96ce52c | 1871 | || !s->hit) { |
38df5a45 MC |
1872 | /* |
1873 | * If we get here then we didn't send early data, or we didn't resume | |
4be3a7c7 MC |
1874 | * using the first identity, or the SNI/ALPN is not consistent so the |
1875 | * server should not be accepting it. | |
38df5a45 | 1876 | */ |
c48ffbcc | 1877 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_EXTENSION); |
38df5a45 MC |
1878 | return 0; |
1879 | } | |
1880 | ||
1881 | s->ext.early_data = SSL_EARLY_DATA_ACCEPTED; | |
1882 | ||
1883 | return 1; | |
1884 | } | |
1885 | ||
61138358 | 1886 | int tls_parse_stoc_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1887 | size_t chainidx) |
4ff65f77 MC |
1888 | { |
1889 | #ifndef OPENSSL_NO_TLS1_3 | |
1890 | unsigned int identity; | |
1891 | ||
1892 | if (!PACKET_get_net_2(pkt, &identity) || PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 1893 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH); |
4ff65f77 MC |
1894 | return 0; |
1895 | } | |
1896 | ||
c96ce52c | 1897 | if (identity >= (unsigned int)s->ext.tick_identity) { |
c48ffbcc | 1898 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_PSK_IDENTITY); |
c96ce52c MC |
1899 | return 0; |
1900 | } | |
1901 | ||
1902 | /* | |
1903 | * Session resumption tickets are always sent before PSK tickets. If the | |
1904 | * ticket index is 0 then it must be for a session resumption ticket if we | |
1905 | * sent two tickets, or if we didn't send a PSK ticket. | |
1906 | */ | |
1907 | if (identity == 0 && (s->psksession == NULL || s->ext.tick_identity == 2)) { | |
9368f865 MC |
1908 | s->hit = 1; |
1909 | SSL_SESSION_free(s->psksession); | |
1910 | s->psksession = NULL; | |
1911 | return 1; | |
1912 | } | |
1913 | ||
c96ce52c MC |
1914 | if (s->psksession == NULL) { |
1915 | /* Should never happen */ | |
c48ffbcc | 1916 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
4ff65f77 MC |
1917 | return 0; |
1918 | } | |
1919 | ||
add8d0e9 MC |
1920 | /* |
1921 | * If we used the external PSK for sending early_data then s->early_secret | |
1922 | * is already set up, so don't overwrite it. Otherwise we copy the | |
1923 | * early_secret across that we generated earlier. | |
1924 | */ | |
1925 | if ((s->early_data_state != SSL_EARLY_DATA_WRITE_RETRY | |
1926 | && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING) | |
1927 | || s->session->ext.max_early_data > 0 | |
1928 | || s->psksession->ext.max_early_data == 0) | |
1929 | memcpy(s->early_secret, s->psksession->early_secret, EVP_MAX_MD_SIZE); | |
1930 | ||
9368f865 MC |
1931 | SSL_SESSION_free(s->session); |
1932 | s->session = s->psksession; | |
1933 | s->psksession = NULL; | |
4ff65f77 | 1934 | s->hit = 1; |
c96ce52c MC |
1935 | /* Early data is only allowed if we used the first ticket */ |
1936 | if (identity != 0) | |
1937 | s->ext.early_data_ok = 0; | |
4ff65f77 MC |
1938 | #endif |
1939 | ||
1940 | return 1; | |
1941 | } |