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6dd083fd | 1 | /* |
6738bf14 | 2 | * Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved. |
6dd083fd MC |
3 | * |
4 | * Licensed under the OpenSSL license (the "License"). You may not use | |
5 | * this file except in compliance with the License. You can obtain a copy | |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
8 | */ | |
9 | ||
ab83e314 | 10 | #include <openssl/ocsp.h> |
6dd083fd | 11 | #include "../ssl_locl.h" |
67dc995e | 12 | #include "internal/cryptlib.h" |
6dd083fd MC |
13 | #include "statem_locl.h" |
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) | |
25 | || !WPACKET_sub_memcpy_u8(pkt, s->s3->previous_client_finished, | |
26 | s->s3->previous_client_finished_len) | |
27 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
28 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_RENEGOTIATE, |
29 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 30 | return EXT_RETURN_FAIL; |
ab83e314 MC |
31 | } |
32 | ||
b186a592 | 33 | return EXT_RETURN_SENT; |
ab83e314 MC |
34 | } |
35 | ||
b186a592 MC |
36 | EXT_RETURN tls_construct_ctos_server_name(SSL *s, WPACKET *pkt, |
37 | unsigned int context, X509 *x, | |
f63a17d6 | 38 | size_t chainidx) |
ab83e314 | 39 | { |
aff8c126 | 40 | if (s->ext.hostname == NULL) |
b186a592 | 41 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
42 | |
43 | /* Add TLS extension servername to the Client Hello message */ | |
44 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_server_name) | |
45 | /* Sub-packet for server_name extension */ | |
46 | || !WPACKET_start_sub_packet_u16(pkt) | |
47 | /* Sub-packet for servername list (always 1 hostname)*/ | |
48 | || !WPACKET_start_sub_packet_u16(pkt) | |
49 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_NAMETYPE_host_name) | |
aff8c126 RS |
50 | || !WPACKET_sub_memcpy_u16(pkt, s->ext.hostname, |
51 | strlen(s->ext.hostname)) | |
ab83e314 MC |
52 | || !WPACKET_close(pkt) |
53 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
54 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_SERVER_NAME, |
55 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 56 | return EXT_RETURN_FAIL; |
ab83e314 MC |
57 | } |
58 | ||
b186a592 | 59 | return EXT_RETURN_SENT; |
ab83e314 MC |
60 | } |
61 | ||
cf72c757 F |
62 | /* Push a Max Fragment Len extension into ClientHello */ |
63 | EXT_RETURN tls_construct_ctos_maxfragmentlen(SSL *s, WPACKET *pkt, | |
64 | unsigned int context, X509 *x, | |
f63a17d6 | 65 | size_t chainidx) |
cf72c757 F |
66 | { |
67 | if (s->ext.max_fragment_len_mode == TLSEXT_max_fragment_length_DISABLED) | |
68 | return EXT_RETURN_NOT_SENT; | |
69 | ||
70 | /* Add Max Fragment Length extension if client enabled it. */ | |
71 | /*- | |
72 | * 4 bytes for this extension type and extension length | |
73 | * 1 byte for the Max Fragment Length code value. | |
74 | */ | |
75 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_max_fragment_length) | |
76 | /* Sub-packet for Max Fragment Length extension (1 byte) */ | |
77 | || !WPACKET_start_sub_packet_u16(pkt) | |
78 | || !WPACKET_put_bytes_u8(pkt, s->ext.max_fragment_len_mode) | |
79 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
80 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
81 | SSL_F_TLS_CONSTRUCT_CTOS_MAXFRAGMENTLEN, ERR_R_INTERNAL_ERROR); | |
cf72c757 F |
82 | return EXT_RETURN_FAIL; |
83 | } | |
84 | ||
85 | return EXT_RETURN_SENT; | |
86 | } | |
87 | ||
ab83e314 | 88 | #ifndef OPENSSL_NO_SRP |
b186a592 | 89 | EXT_RETURN tls_construct_ctos_srp(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 90 | X509 *x, size_t chainidx) |
ab83e314 MC |
91 | { |
92 | /* Add SRP username if there is one */ | |
93 | if (s->srp_ctx.login == NULL) | |
b186a592 | 94 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
95 | |
96 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_srp) | |
97 | /* Sub-packet for SRP extension */ | |
98 | || !WPACKET_start_sub_packet_u16(pkt) | |
99 | || !WPACKET_start_sub_packet_u8(pkt) | |
100 | /* login must not be zero...internal error if so */ | |
101 | || !WPACKET_set_flags(pkt, WPACKET_FLAGS_NON_ZERO_LENGTH) | |
102 | || !WPACKET_memcpy(pkt, s->srp_ctx.login, | |
103 | strlen(s->srp_ctx.login)) | |
104 | || !WPACKET_close(pkt) | |
105 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
106 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_SRP, |
107 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 108 | return EXT_RETURN_FAIL; |
ab83e314 MC |
109 | } |
110 | ||
b186a592 | 111 | return EXT_RETURN_SENT; |
ab83e314 MC |
112 | } |
113 | #endif | |
114 | ||
115 | #ifndef OPENSSL_NO_EC | |
116 | static int use_ecc(SSL *s) | |
117 | { | |
1266eefd | 118 | int i, end; |
ab83e314 MC |
119 | unsigned long alg_k, alg_a; |
120 | STACK_OF(SSL_CIPHER) *cipher_stack = NULL; | |
121 | ||
122 | /* See if we support any ECC ciphersuites */ | |
123 | if (s->version == SSL3_VERSION) | |
124 | return 0; | |
125 | ||
ab83e314 | 126 | cipher_stack = SSL_get_ciphers(s); |
1266eefd MC |
127 | end = sk_SSL_CIPHER_num(cipher_stack); |
128 | for (i = 0; i < end; i++) { | |
ab83e314 MC |
129 | const SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i); |
130 | ||
131 | alg_k = c->algorithm_mkey; | |
132 | alg_a = c->algorithm_auth; | |
133 | if ((alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) | |
1266eefd MC |
134 | || (alg_a & SSL_aECDSA) |
135 | || c->min_tls >= TLS1_3_VERSION) | |
e0926ef4 | 136 | return 1; |
ab83e314 MC |
137 | } |
138 | ||
e0926ef4 | 139 | return 0; |
ab83e314 MC |
140 | } |
141 | ||
b186a592 MC |
142 | EXT_RETURN tls_construct_ctos_ec_pt_formats(SSL *s, WPACKET *pkt, |
143 | unsigned int context, X509 *x, | |
f63a17d6 | 144 | size_t chainidx) |
ab83e314 MC |
145 | { |
146 | const unsigned char *pformats; | |
147 | size_t num_formats; | |
148 | ||
149 | if (!use_ecc(s)) | |
b186a592 | 150 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
151 | |
152 | /* Add TLS extension ECPointFormats to the ClientHello message */ | |
ab83e314 MC |
153 | tls1_get_formatlist(s, &pformats, &num_formats); |
154 | ||
155 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_ec_point_formats) | |
156 | /* Sub-packet for formats extension */ | |
157 | || !WPACKET_start_sub_packet_u16(pkt) | |
158 | || !WPACKET_sub_memcpy_u8(pkt, pformats, num_formats) | |
159 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
160 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
161 | SSL_F_TLS_CONSTRUCT_CTOS_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR); | |
b186a592 | 162 | return EXT_RETURN_FAIL; |
ab83e314 MC |
163 | } |
164 | ||
b186a592 | 165 | return EXT_RETURN_SENT; |
ab83e314 MC |
166 | } |
167 | ||
b186a592 MC |
168 | EXT_RETURN tls_construct_ctos_supported_groups(SSL *s, WPACKET *pkt, |
169 | unsigned int context, X509 *x, | |
f63a17d6 | 170 | size_t chainidx) |
ab83e314 | 171 | { |
f48d826e DSH |
172 | const uint16_t *pgroups = NULL; |
173 | size_t num_groups = 0, i; | |
ab83e314 MC |
174 | |
175 | if (!use_ecc(s)) | |
b186a592 | 176 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
177 | |
178 | /* | |
179 | * Add TLS extension supported_groups to the ClientHello message | |
180 | */ | |
181 | /* TODO(TLS1.3): Add support for DHE groups */ | |
f48d826e | 182 | tls1_get_supported_groups(s, &pgroups, &num_groups); |
ab83e314 MC |
183 | |
184 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_groups) | |
185 | /* Sub-packet for supported_groups extension */ | |
186 | || !WPACKET_start_sub_packet_u16(pkt) | |
187 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
f63a17d6 MC |
188 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
189 | SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, | |
190 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 191 | return EXT_RETURN_FAIL; |
ab83e314 MC |
192 | } |
193 | /* Copy curve ID if supported */ | |
f48d826e DSH |
194 | for (i = 0; i < num_groups; i++) { |
195 | uint16_t ctmp = pgroups[i]; | |
9e84a42d DSH |
196 | |
197 | if (tls_curve_allowed(s, ctmp, SSL_SECOP_CURVE_SUPPORTED)) { | |
198 | if (!WPACKET_put_bytes_u16(pkt, ctmp)) { | |
635c8f77 MC |
199 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
200 | SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, | |
201 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 202 | return EXT_RETURN_FAIL; |
ab83e314 MC |
203 | } |
204 | } | |
205 | } | |
206 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
635c8f77 MC |
207 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
208 | SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, | |
209 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 210 | return EXT_RETURN_FAIL; |
ab83e314 MC |
211 | } |
212 | ||
b186a592 | 213 | return EXT_RETURN_SENT; |
ab83e314 MC |
214 | } |
215 | #endif | |
216 | ||
b186a592 MC |
217 | EXT_RETURN tls_construct_ctos_session_ticket(SSL *s, WPACKET *pkt, |
218 | unsigned int context, X509 *x, | |
f63a17d6 | 219 | size_t chainidx) |
ab83e314 MC |
220 | { |
221 | size_t ticklen; | |
222 | ||
223 | if (!tls_use_ticket(s)) | |
b186a592 | 224 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
225 | |
226 | if (!s->new_session && s->session != NULL | |
08191294 MC |
227 | && s->session->ext.tick != NULL |
228 | && s->session->ssl_version != TLS1_3_VERSION) { | |
aff8c126 RS |
229 | ticklen = s->session->ext.ticklen; |
230 | } else if (s->session && s->ext.session_ticket != NULL | |
231 | && s->ext.session_ticket->data != NULL) { | |
232 | ticklen = s->ext.session_ticket->length; | |
233 | s->session->ext.tick = OPENSSL_malloc(ticklen); | |
234 | if (s->session->ext.tick == NULL) { | |
f63a17d6 MC |
235 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
236 | SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET, | |
237 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 238 | return EXT_RETURN_FAIL; |
ab83e314 | 239 | } |
aff8c126 RS |
240 | memcpy(s->session->ext.tick, |
241 | s->ext.session_ticket->data, ticklen); | |
242 | s->session->ext.ticklen = ticklen; | |
ab83e314 MC |
243 | } else { |
244 | ticklen = 0; | |
245 | } | |
246 | ||
aff8c126 RS |
247 | if (ticklen == 0 && s->ext.session_ticket != NULL && |
248 | s->ext.session_ticket->data == NULL) | |
b186a592 | 249 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
250 | |
251 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket) | |
aff8c126 | 252 | || !WPACKET_sub_memcpy_u16(pkt, s->session->ext.tick, ticklen)) { |
f63a17d6 MC |
253 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
254 | SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET, ERR_R_INTERNAL_ERROR); | |
b186a592 | 255 | return EXT_RETURN_FAIL; |
ab83e314 MC |
256 | } |
257 | ||
b186a592 | 258 | return EXT_RETURN_SENT; |
ab83e314 MC |
259 | } |
260 | ||
b186a592 MC |
261 | EXT_RETURN tls_construct_ctos_sig_algs(SSL *s, WPACKET *pkt, |
262 | unsigned int context, X509 *x, | |
f63a17d6 | 263 | size_t chainidx) |
ab83e314 MC |
264 | { |
265 | size_t salglen; | |
98c792d1 | 266 | const uint16_t *salg; |
ab83e314 MC |
267 | |
268 | if (!SSL_CLIENT_USE_SIGALGS(s)) | |
b186a592 | 269 | return EXT_RETURN_NOT_SENT; |
ab83e314 | 270 | |
a9669ddc | 271 | salglen = tls12_get_psigalgs(s, 1, &salg); |
ab83e314 MC |
272 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signature_algorithms) |
273 | /* Sub-packet for sig-algs extension */ | |
274 | || !WPACKET_start_sub_packet_u16(pkt) | |
275 | /* Sub-packet for the actual list */ | |
276 | || !WPACKET_start_sub_packet_u16(pkt) | |
277 | || !tls12_copy_sigalgs(s, pkt, salg, salglen) | |
278 | || !WPACKET_close(pkt) | |
279 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
280 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_SIG_ALGS, |
281 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 282 | return EXT_RETURN_FAIL; |
ab83e314 MC |
283 | } |
284 | ||
b186a592 | 285 | return EXT_RETURN_SENT; |
ab83e314 MC |
286 | } |
287 | ||
288 | #ifndef OPENSSL_NO_OCSP | |
b186a592 MC |
289 | EXT_RETURN tls_construct_ctos_status_request(SSL *s, WPACKET *pkt, |
290 | unsigned int context, X509 *x, | |
f63a17d6 | 291 | size_t chainidx) |
ab83e314 MC |
292 | { |
293 | int i; | |
294 | ||
e96e0f8e MC |
295 | /* This extension isn't defined for client Certificates */ |
296 | if (x != NULL) | |
b186a592 | 297 | return EXT_RETURN_NOT_SENT; |
e96e0f8e | 298 | |
aff8c126 | 299 | if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) |
b186a592 | 300 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
301 | |
302 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request) | |
303 | /* Sub-packet for status request extension */ | |
304 | || !WPACKET_start_sub_packet_u16(pkt) | |
305 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_STATUSTYPE_ocsp) | |
306 | /* Sub-packet for the ids */ | |
307 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
f63a17d6 MC |
308 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
309 | SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); | |
b186a592 | 310 | return EXT_RETURN_FAIL; |
ab83e314 | 311 | } |
aff8c126 | 312 | for (i = 0; i < sk_OCSP_RESPID_num(s->ext.ocsp.ids); i++) { |
ab83e314 | 313 | unsigned char *idbytes; |
aff8c126 | 314 | OCSP_RESPID *id = sk_OCSP_RESPID_value(s->ext.ocsp.ids, i); |
1266eefd | 315 | int idlen = i2d_OCSP_RESPID(id, NULL); |
ab83e314 | 316 | |
ab83e314 MC |
317 | if (idlen <= 0 |
318 | /* Sub-packet for an individual id */ | |
319 | || !WPACKET_sub_allocate_bytes_u16(pkt, idlen, &idbytes) | |
320 | || i2d_OCSP_RESPID(id, &idbytes) != idlen) { | |
f63a17d6 MC |
321 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
322 | SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, | |
323 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 324 | return EXT_RETURN_FAIL; |
ab83e314 MC |
325 | } |
326 | } | |
327 | if (!WPACKET_close(pkt) | |
328 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
f63a17d6 MC |
329 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
330 | SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); | |
b186a592 | 331 | return EXT_RETURN_FAIL; |
ab83e314 | 332 | } |
aff8c126 | 333 | if (s->ext.ocsp.exts) { |
ab83e314 | 334 | unsigned char *extbytes; |
aff8c126 | 335 | int extlen = i2d_X509_EXTENSIONS(s->ext.ocsp.exts, NULL); |
ab83e314 MC |
336 | |
337 | if (extlen < 0) { | |
f63a17d6 MC |
338 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
339 | SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, | |
340 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 341 | return EXT_RETURN_FAIL; |
ab83e314 MC |
342 | } |
343 | if (!WPACKET_allocate_bytes(pkt, extlen, &extbytes) | |
aff8c126 | 344 | || i2d_X509_EXTENSIONS(s->ext.ocsp.exts, &extbytes) |
ab83e314 | 345 | != extlen) { |
f63a17d6 MC |
346 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
347 | SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, | |
348 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 349 | return EXT_RETURN_FAIL; |
ab83e314 MC |
350 | } |
351 | } | |
352 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
353 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
354 | SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); | |
b186a592 | 355 | return EXT_RETURN_FAIL; |
ab83e314 MC |
356 | } |
357 | ||
b186a592 | 358 | return EXT_RETURN_SENT; |
ab83e314 MC |
359 | } |
360 | #endif | |
361 | ||
362 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
b186a592 | 363 | EXT_RETURN tls_construct_ctos_npn(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 364 | X509 *x, size_t chainidx) |
ab83e314 | 365 | { |
c7f47786 | 366 | if (s->ctx->ext.npn_select_cb == NULL || !SSL_IS_FIRST_HANDSHAKE(s)) |
b186a592 | 367 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
368 | |
369 | /* | |
370 | * The client advertises an empty extension to indicate its support | |
371 | * for Next Protocol Negotiation | |
372 | */ | |
373 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_next_proto_neg) | |
374 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
f63a17d6 MC |
375 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_NPN, |
376 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 377 | return EXT_RETURN_FAIL; |
ab83e314 MC |
378 | } |
379 | ||
b186a592 | 380 | return EXT_RETURN_SENT; |
ab83e314 MC |
381 | } |
382 | #endif | |
383 | ||
b186a592 | 384 | EXT_RETURN tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 385 | X509 *x, size_t chainidx) |
ab83e314 MC |
386 | { |
387 | s->s3->alpn_sent = 0; | |
388 | ||
c7f47786 | 389 | if (s->ext.alpn == NULL || !SSL_IS_FIRST_HANDSHAKE(s)) |
b186a592 | 390 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
391 | |
392 | if (!WPACKET_put_bytes_u16(pkt, | |
393 | TLSEXT_TYPE_application_layer_protocol_negotiation) | |
394 | /* Sub-packet ALPN extension */ | |
395 | || !WPACKET_start_sub_packet_u16(pkt) | |
aff8c126 | 396 | || !WPACKET_sub_memcpy_u16(pkt, s->ext.alpn, s->ext.alpn_len) |
ab83e314 | 397 | || !WPACKET_close(pkt)) { |
f63a17d6 MC |
398 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_ALPN, |
399 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 400 | return EXT_RETURN_FAIL; |
ab83e314 MC |
401 | } |
402 | s->s3->alpn_sent = 1; | |
403 | ||
b186a592 | 404 | return EXT_RETURN_SENT; |
ab83e314 MC |
405 | } |
406 | ||
407 | ||
408 | #ifndef OPENSSL_NO_SRTP | |
b186a592 MC |
409 | EXT_RETURN tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt, |
410 | unsigned int context, X509 *x, | |
f63a17d6 | 411 | size_t chainidx) |
ab83e314 MC |
412 | { |
413 | STACK_OF(SRTP_PROTECTION_PROFILE) *clnt = SSL_get_srtp_profiles(s); | |
1266eefd | 414 | int i, end; |
ab83e314 MC |
415 | |
416 | if (clnt == NULL) | |
b186a592 | 417 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
418 | |
419 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp) | |
420 | /* Sub-packet for SRTP extension */ | |
421 | || !WPACKET_start_sub_packet_u16(pkt) | |
422 | /* Sub-packet for the protection profile list */ | |
423 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
f63a17d6 MC |
424 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, |
425 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 426 | return EXT_RETURN_FAIL; |
ab83e314 | 427 | } |
1266eefd MC |
428 | |
429 | end = sk_SRTP_PROTECTION_PROFILE_num(clnt); | |
430 | for (i = 0; i < end; i++) { | |
431 | const SRTP_PROTECTION_PROFILE *prof = | |
432 | sk_SRTP_PROTECTION_PROFILE_value(clnt, i); | |
433 | ||
ab83e314 | 434 | if (prof == NULL || !WPACKET_put_bytes_u16(pkt, prof->id)) { |
f63a17d6 MC |
435 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
436 | SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR); | |
b186a592 | 437 | return EXT_RETURN_FAIL; |
ab83e314 MC |
438 | } |
439 | } | |
440 | if (!WPACKET_close(pkt) | |
441 | /* Add an empty use_mki value */ | |
442 | || !WPACKET_put_bytes_u8(pkt, 0) | |
443 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
444 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, |
445 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 446 | return EXT_RETURN_FAIL; |
ab83e314 MC |
447 | } |
448 | ||
b186a592 | 449 | return EXT_RETURN_SENT; |
ab83e314 MC |
450 | } |
451 | #endif | |
452 | ||
b186a592 | 453 | EXT_RETURN tls_construct_ctos_etm(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 454 | X509 *x, size_t chainidx) |
ab83e314 MC |
455 | { |
456 | if (s->options & SSL_OP_NO_ENCRYPT_THEN_MAC) | |
b186a592 | 457 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
458 | |
459 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac) | |
460 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
f63a17d6 MC |
461 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_ETM, |
462 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 463 | return EXT_RETURN_FAIL; |
ab83e314 MC |
464 | } |
465 | ||
b186a592 | 466 | return EXT_RETURN_SENT; |
ab83e314 MC |
467 | } |
468 | ||
469 | #ifndef OPENSSL_NO_CT | |
b186a592 | 470 | EXT_RETURN tls_construct_ctos_sct(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 471 | X509 *x, size_t chainidx) |
ab83e314 MC |
472 | { |
473 | if (s->ct_validation_callback == NULL) | |
b186a592 | 474 | return EXT_RETURN_NOT_SENT; |
ab83e314 | 475 | |
e96e0f8e MC |
476 | /* Not defined for client Certificates */ |
477 | if (x != NULL) | |
b186a592 | 478 | return EXT_RETURN_NOT_SENT; |
e96e0f8e | 479 | |
ab83e314 MC |
480 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signed_certificate_timestamp) |
481 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
f63a17d6 MC |
482 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_SCT, |
483 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 484 | return EXT_RETURN_FAIL; |
ab83e314 MC |
485 | } |
486 | ||
b186a592 | 487 | return EXT_RETURN_SENT; |
ab83e314 MC |
488 | } |
489 | #endif | |
490 | ||
b186a592 | 491 | EXT_RETURN tls_construct_ctos_ems(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 492 | X509 *x, size_t chainidx) |
ab83e314 MC |
493 | { |
494 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret) | |
495 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
f63a17d6 MC |
496 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_EMS, |
497 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 498 | return EXT_RETURN_FAIL; |
ab83e314 MC |
499 | } |
500 | ||
b186a592 | 501 | return EXT_RETURN_SENT; |
ab83e314 MC |
502 | } |
503 | ||
b186a592 MC |
504 | EXT_RETURN tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt, |
505 | unsigned int context, X509 *x, | |
f63a17d6 | 506 | size_t chainidx) |
ab83e314 MC |
507 | { |
508 | int currv, min_version, max_version, reason; | |
509 | ||
88050dd1 MC |
510 | reason = ssl_get_min_max_version(s, &min_version, &max_version); |
511 | if (reason != 0) { | |
512 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
513 | SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, reason); | |
514 | return EXT_RETURN_FAIL; | |
515 | } | |
516 | ||
517 | /* | |
518 | * Don't include this if we can't negotiate TLSv1.3. We can do a straight | |
519 | * comparison here because we will never be called in DTLS. | |
520 | */ | |
521 | if (max_version < TLS1_3_VERSION) | |
522 | return EXT_RETURN_NOT_SENT; | |
523 | ||
ab83e314 MC |
524 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_versions) |
525 | || !WPACKET_start_sub_packet_u16(pkt) | |
526 | || !WPACKET_start_sub_packet_u8(pkt)) { | |
f63a17d6 MC |
527 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
528 | SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, | |
529 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 530 | return EXT_RETURN_FAIL; |
ab83e314 MC |
531 | } |
532 | ||
ab83e314 | 533 | /* |
1ee4b98e | 534 | * TODO(TLS1.3): There is some discussion on the TLS list as to whether |
ab83e314 MC |
535 | * we should include versions <TLS1.2. For the moment we do. To be |
536 | * reviewed later. | |
537 | */ | |
538 | for (currv = max_version; currv >= min_version; currv--) { | |
539 | /* TODO(TLS1.3): Remove this first if clause prior to release!! */ | |
540 | if (currv == TLS1_3_VERSION) { | |
541 | if (!WPACKET_put_bytes_u16(pkt, TLS1_3_VERSION_DRAFT)) { | |
f63a17d6 MC |
542 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
543 | SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, | |
544 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 545 | return EXT_RETURN_FAIL; |
ab83e314 MC |
546 | } |
547 | } else if (!WPACKET_put_bytes_u16(pkt, currv)) { | |
f63a17d6 MC |
548 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
549 | SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, | |
550 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 551 | return EXT_RETURN_FAIL; |
ab83e314 MC |
552 | } |
553 | } | |
554 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
555 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
556 | SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, | |
557 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 558 | return EXT_RETURN_FAIL; |
ab83e314 MC |
559 | } |
560 | ||
b186a592 | 561 | return EXT_RETURN_SENT; |
ab83e314 MC |
562 | } |
563 | ||
b2f7e8c0 | 564 | /* |
e3c0d76b | 565 | * Construct a psk_kex_modes extension. |
b2f7e8c0 | 566 | */ |
b186a592 MC |
567 | EXT_RETURN tls_construct_ctos_psk_kex_modes(SSL *s, WPACKET *pkt, |
568 | unsigned int context, X509 *x, | |
f63a17d6 | 569 | size_t chainidx) |
b2f7e8c0 MC |
570 | { |
571 | #ifndef OPENSSL_NO_TLS1_3 | |
e3c0d76b MC |
572 | int nodhe = s->options & SSL_OP_ALLOW_NO_DHE_KEX; |
573 | ||
b2f7e8c0 MC |
574 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk_kex_modes) |
575 | || !WPACKET_start_sub_packet_u16(pkt) | |
576 | || !WPACKET_start_sub_packet_u8(pkt) | |
577 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE_DHE) | |
e3c0d76b | 578 | || (nodhe && !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE)) |
b2f7e8c0 MC |
579 | || !WPACKET_close(pkt) |
580 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
581 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
582 | SSL_F_TLS_CONSTRUCT_CTOS_PSK_KEX_MODES, ERR_R_INTERNAL_ERROR); | |
b186a592 | 583 | return EXT_RETURN_FAIL; |
b2f7e8c0 | 584 | } |
b3ad72ce | 585 | |
e3c0d76b MC |
586 | s->ext.psk_kex_mode = TLSEXT_KEX_MODE_FLAG_KE_DHE; |
587 | if (nodhe) | |
588 | s->ext.psk_kex_mode |= TLSEXT_KEX_MODE_FLAG_KE; | |
b2f7e8c0 MC |
589 | #endif |
590 | ||
b186a592 | 591 | return EXT_RETURN_SENT; |
b2f7e8c0 MC |
592 | } |
593 | ||
3847d426 MC |
594 | #ifndef OPENSSL_NO_TLS1_3 |
595 | static int add_key_share(SSL *s, WPACKET *pkt, unsigned int curve_id) | |
596 | { | |
7b1ec1cf MC |
597 | unsigned char *encoded_point = NULL; |
598 | EVP_PKEY *key_share_key = NULL; | |
3847d426 MC |
599 | size_t encodedlen; |
600 | ||
7b1ec1cf | 601 | if (s->s3->tmp.pkey != NULL) { |
fc7129dc | 602 | if (!ossl_assert(s->hello_retry_request == SSL_HRR_PENDING)) { |
f63a17d6 MC |
603 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_ADD_KEY_SHARE, |
604 | ERR_R_INTERNAL_ERROR); | |
d8028b20 | 605 | return 0; |
7b1ec1cf MC |
606 | } |
607 | /* | |
608 | * Could happen if we got an HRR that wasn't requesting a new key_share | |
609 | */ | |
610 | key_share_key = s->s3->tmp.pkey; | |
611 | } else { | |
f63a17d6 | 612 | key_share_key = ssl_generate_pkey_group(s, curve_id); |
7b1ec1cf | 613 | if (key_share_key == NULL) { |
f63a17d6 | 614 | /* SSLfatal() already called */ |
d8028b20 | 615 | return 0; |
7b1ec1cf | 616 | } |
3847d426 MC |
617 | } |
618 | ||
619 | /* Encode the public key. */ | |
620 | encodedlen = EVP_PKEY_get1_tls_encodedpoint(key_share_key, | |
2248dbeb | 621 | &encoded_point); |
3847d426 | 622 | if (encodedlen == 0) { |
f63a17d6 | 623 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_ADD_KEY_SHARE, ERR_R_EC_LIB); |
7b1ec1cf | 624 | goto err; |
3847d426 MC |
625 | } |
626 | ||
627 | /* Create KeyShareEntry */ | |
628 | if (!WPACKET_put_bytes_u16(pkt, curve_id) | |
2248dbeb | 629 | || !WPACKET_sub_memcpy_u16(pkt, encoded_point, encodedlen)) { |
f63a17d6 MC |
630 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_ADD_KEY_SHARE, |
631 | ERR_R_INTERNAL_ERROR); | |
7b1ec1cf | 632 | goto err; |
3847d426 MC |
633 | } |
634 | ||
635 | /* | |
636 | * TODO(TLS1.3): When changing to send more than one key_share we're | |
637 | * going to need to be able to save more than one EVP_PKEY. For now | |
638 | * we reuse the existing tmp.pkey | |
639 | */ | |
640 | s->s3->tmp.pkey = key_share_key; | |
641 | s->s3->group_id = curve_id; | |
2248dbeb | 642 | OPENSSL_free(encoded_point); |
3847d426 | 643 | |
d8028b20 | 644 | return 1; |
7b1ec1cf MC |
645 | err: |
646 | if (s->s3->tmp.pkey == NULL) | |
647 | EVP_PKEY_free(key_share_key); | |
648 | OPENSSL_free(encoded_point); | |
d8028b20 | 649 | return 0; |
3847d426 MC |
650 | } |
651 | #endif | |
652 | ||
b186a592 MC |
653 | EXT_RETURN tls_construct_ctos_key_share(SSL *s, WPACKET *pkt, |
654 | unsigned int context, X509 *x, | |
f63a17d6 | 655 | size_t chainidx) |
ab83e314 | 656 | { |
3cf96e88 | 657 | #ifndef OPENSSL_NO_TLS1_3 |
f48d826e DSH |
658 | size_t i, num_groups = 0; |
659 | const uint16_t *pgroups = NULL; | |
9e84a42d | 660 | uint16_t curve_id = 0; |
ab83e314 MC |
661 | |
662 | /* key_share extension */ | |
663 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
664 | /* Extension data sub-packet */ | |
665 | || !WPACKET_start_sub_packet_u16(pkt) | |
666 | /* KeyShare list sub-packet */ | |
667 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
f63a17d6 MC |
668 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, |
669 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 670 | return EXT_RETURN_FAIL; |
ab83e314 MC |
671 | } |
672 | ||
f48d826e | 673 | tls1_get_supported_groups(s, &pgroups, &num_groups); |
ab83e314 MC |
674 | |
675 | /* | |
676 | * TODO(TLS1.3): Make the number of key_shares sent configurable. For | |
677 | * now, just send one | |
678 | */ | |
3847d426 MC |
679 | if (s->s3->group_id != 0) { |
680 | curve_id = s->s3->group_id; | |
681 | } else { | |
f48d826e | 682 | for (i = 0; i < num_groups; i++) { |
ab83e314 | 683 | |
f48d826e | 684 | if (!tls_curve_allowed(s, pgroups[i], SSL_SECOP_CURVE_SUPPORTED)) |
3847d426 | 685 | continue; |
ab83e314 | 686 | |
f48d826e | 687 | curve_id = pgroups[i]; |
3847d426 | 688 | break; |
ab83e314 | 689 | } |
3847d426 | 690 | } |
ab83e314 | 691 | |
3847d426 | 692 | if (curve_id == 0) { |
f63a17d6 MC |
693 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, |
694 | SSL_R_NO_SUITABLE_KEY_SHARE); | |
b186a592 | 695 | return EXT_RETURN_FAIL; |
ab83e314 MC |
696 | } |
697 | ||
f63a17d6 MC |
698 | if (!add_key_share(s, pkt, curve_id)) { |
699 | /* SSLfatal() already called */ | |
b186a592 | 700 | return EXT_RETURN_FAIL; |
f63a17d6 | 701 | } |
3847d426 | 702 | |
ab83e314 | 703 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { |
f63a17d6 MC |
704 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, |
705 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 706 | return EXT_RETURN_FAIL; |
ab83e314 | 707 | } |
3cf96e88 | 708 | #endif |
ab83e314 | 709 | |
b186a592 | 710 | return EXT_RETURN_SENT; |
ab83e314 MC |
711 | } |
712 | ||
b186a592 | 713 | EXT_RETURN tls_construct_ctos_cookie(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 714 | X509 *x, size_t chainidx) |
cfef5027 | 715 | { |
b186a592 | 716 | EXT_RETURN ret = EXT_RETURN_FAIL; |
cfef5027 MC |
717 | |
718 | /* Should only be set if we've had an HRR */ | |
719 | if (s->ext.tls13_cookie_len == 0) | |
b186a592 | 720 | return EXT_RETURN_NOT_SENT; |
cfef5027 MC |
721 | |
722 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_cookie) | |
723 | /* Extension data sub-packet */ | |
724 | || !WPACKET_start_sub_packet_u16(pkt) | |
725 | || !WPACKET_sub_memcpy_u16(pkt, s->ext.tls13_cookie, | |
726 | s->ext.tls13_cookie_len) | |
727 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
728 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_COOKIE, |
729 | ERR_R_INTERNAL_ERROR); | |
cfef5027 MC |
730 | goto end; |
731 | } | |
732 | ||
b186a592 | 733 | ret = EXT_RETURN_SENT; |
cfef5027 MC |
734 | end: |
735 | OPENSSL_free(s->ext.tls13_cookie); | |
febb0afa | 736 | s->ext.tls13_cookie = NULL; |
cfef5027 MC |
737 | s->ext.tls13_cookie_len = 0; |
738 | ||
739 | return ret; | |
740 | } | |
741 | ||
b186a592 MC |
742 | EXT_RETURN tls_construct_ctos_early_data(SSL *s, WPACKET *pkt, |
743 | unsigned int context, X509 *x, | |
f63a17d6 | 744 | size_t chainidx) |
38df5a45 | 745 | { |
ccb76685 | 746 | const unsigned char *id = NULL; |
fff202e5 | 747 | size_t idlen = 0; |
add8d0e9 | 748 | SSL_SESSION *psksess = NULL; |
ffc5bbaa | 749 | SSL_SESSION *edsess = NULL; |
add8d0e9 MC |
750 | const EVP_MD *handmd = NULL; |
751 | ||
fc7129dc | 752 | if (s->hello_retry_request == SSL_HRR_PENDING) |
add8d0e9 MC |
753 | handmd = ssl_handshake_md(s); |
754 | ||
755 | if (s->psk_use_session_cb != NULL | |
ffc5bbaa MC |
756 | && (!s->psk_use_session_cb(s, handmd, &id, &idlen, &psksess) |
757 | || (psksess != NULL | |
758 | && psksess->ssl_version != TLS1_3_VERSION))) { | |
759 | SSL_SESSION_free(psksess); | |
f63a17d6 MC |
760 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, |
761 | SSL_R_BAD_PSK); | |
add8d0e9 MC |
762 | return EXT_RETURN_FAIL; |
763 | } | |
764 | ||
765 | SSL_SESSION_free(s->psksession); | |
766 | s->psksession = psksess; | |
767 | if (psksess != NULL) { | |
768 | OPENSSL_free(s->psksession_id); | |
769 | s->psksession_id = OPENSSL_memdup(id, idlen); | |
770 | if (s->psksession_id == NULL) { | |
f63a17d6 MC |
771 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
772 | SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, ERR_R_INTERNAL_ERROR); | |
add8d0e9 MC |
773 | return EXT_RETURN_FAIL; |
774 | } | |
775 | s->psksession_id_len = idlen; | |
776 | } | |
777 | ||
38df5a45 | 778 | if (s->early_data_state != SSL_EARLY_DATA_CONNECTING |
add8d0e9 MC |
779 | || (s->session->ext.max_early_data == 0 |
780 | && (psksess == NULL || psksess->ext.max_early_data == 0))) { | |
38df5a45 | 781 | s->max_early_data = 0; |
b186a592 | 782 | return EXT_RETURN_NOT_SENT; |
38df5a45 | 783 | } |
ffc5bbaa MC |
784 | edsess = s->session->ext.max_early_data != 0 ? s->session : psksess; |
785 | s->max_early_data = edsess->ext.max_early_data; | |
786 | ||
bfab12bb MC |
787 | if (edsess->ext.hostname != NULL) { |
788 | if (s->ext.hostname == NULL | |
789 | || (s->ext.hostname != NULL | |
790 | && strcmp(s->ext.hostname, edsess->ext.hostname) != 0)) { | |
f63a17d6 MC |
791 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
792 | SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, | |
793 | SSL_R_INCONSISTENT_EARLY_DATA_SNI); | |
bfab12bb MC |
794 | return EXT_RETURN_FAIL; |
795 | } | |
ffc5bbaa MC |
796 | } |
797 | ||
798 | if ((s->ext.alpn == NULL && edsess->ext.alpn_selected != NULL)) { | |
f63a17d6 MC |
799 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, |
800 | SSL_R_INCONSISTENT_EARLY_DATA_ALPN); | |
ffc5bbaa MC |
801 | return EXT_RETURN_FAIL; |
802 | } | |
803 | ||
804 | /* | |
805 | * Verify that we are offering an ALPN protocol consistent with the early | |
806 | * data. | |
807 | */ | |
808 | if (edsess->ext.alpn_selected != NULL) { | |
809 | PACKET prots, alpnpkt; | |
810 | int found = 0; | |
811 | ||
812 | if (!PACKET_buf_init(&prots, s->ext.alpn, s->ext.alpn_len)) { | |
f63a17d6 MC |
813 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
814 | SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, ERR_R_INTERNAL_ERROR); | |
ffc5bbaa MC |
815 | return EXT_RETURN_FAIL; |
816 | } | |
817 | while (PACKET_get_length_prefixed_1(&prots, &alpnpkt)) { | |
818 | if (PACKET_equal(&alpnpkt, edsess->ext.alpn_selected, | |
819 | edsess->ext.alpn_selected_len)) { | |
820 | found = 1; | |
821 | break; | |
822 | } | |
823 | } | |
824 | if (!found) { | |
f63a17d6 MC |
825 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
826 | SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, | |
827 | SSL_R_INCONSISTENT_EARLY_DATA_ALPN); | |
ffc5bbaa MC |
828 | return EXT_RETURN_FAIL; |
829 | } | |
830 | } | |
38df5a45 MC |
831 | |
832 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) | |
833 | || !WPACKET_start_sub_packet_u16(pkt) | |
834 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
835 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, |
836 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 837 | return EXT_RETURN_FAIL; |
38df5a45 MC |
838 | } |
839 | ||
840 | /* | |
841 | * We set this to rejected here. Later, if the server acknowledges the | |
842 | * extension, we set it to accepted. | |
843 | */ | |
844 | s->ext.early_data = SSL_EARLY_DATA_REJECTED; | |
4be3a7c7 | 845 | s->ext.early_data_ok = 1; |
38df5a45 | 846 | |
b186a592 | 847 | return EXT_RETURN_SENT; |
38df5a45 MC |
848 | } |
849 | ||
1266eefd MC |
850 | #define F5_WORKAROUND_MIN_MSG_LEN 0xff |
851 | #define F5_WORKAROUND_MAX_MSG_LEN 0x200 | |
852 | ||
d702ad12 MC |
853 | /* |
854 | * PSK pre binder overhead = | |
855 | * 2 bytes for TLSEXT_TYPE_psk | |
856 | * 2 bytes for extension length | |
857 | * 2 bytes for identities list length | |
858 | * 2 bytes for identity length | |
859 | * 4 bytes for obfuscated_ticket_age | |
860 | * 2 bytes for binder list length | |
861 | * 1 byte for binder length | |
862 | * The above excludes the number of bytes for the identity itself and the | |
863 | * subsequent binder bytes | |
864 | */ | |
865 | #define PSK_PRE_BINDER_OVERHEAD (2 + 2 + 2 + 2 + 4 + 2 + 1) | |
866 | ||
b186a592 MC |
867 | EXT_RETURN tls_construct_ctos_padding(SSL *s, WPACKET *pkt, |
868 | unsigned int context, X509 *x, | |
f63a17d6 | 869 | size_t chainidx) |
ab83e314 MC |
870 | { |
871 | unsigned char *padbytes; | |
872 | size_t hlen; | |
873 | ||
874 | if ((s->options & SSL_OP_TLSEXT_PADDING) == 0) | |
b186a592 | 875 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
876 | |
877 | /* | |
d702ad12 MC |
878 | * Add padding to workaround bugs in F5 terminators. See RFC7685. |
879 | * This code calculates the length of all extensions added so far but | |
880 | * excludes the PSK extension (because that MUST be written last). Therefore | |
881 | * this extension MUST always appear second to last. | |
ab83e314 MC |
882 | */ |
883 | if (!WPACKET_get_total_written(pkt, &hlen)) { | |
f63a17d6 MC |
884 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PADDING, |
885 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 886 | return EXT_RETURN_FAIL; |
ab83e314 MC |
887 | } |
888 | ||
d702ad12 MC |
889 | /* |
890 | * If we're going to send a PSK then that will be written out after this | |
891 | * extension, so we need to calculate how long it is going to be. | |
892 | */ | |
893 | if (s->session->ssl_version == TLS1_3_VERSION | |
894 | && s->session->ext.ticklen != 0 | |
895 | && s->session->cipher != NULL) { | |
896 | const EVP_MD *md = ssl_md(s->session->cipher->algorithm2); | |
897 | ||
898 | if (md != NULL) { | |
899 | /* | |
900 | * Add the fixed PSK overhead, the identity length and the binder | |
901 | * length. | |
902 | */ | |
903 | hlen += PSK_PRE_BINDER_OVERHEAD + s->session->ext.ticklen | |
904 | + EVP_MD_size(md); | |
905 | } | |
906 | } | |
907 | ||
1266eefd | 908 | if (hlen > F5_WORKAROUND_MIN_MSG_LEN && hlen < F5_WORKAROUND_MAX_MSG_LEN) { |
1ee4b98e | 909 | /* Calculate the amount of padding we need to add */ |
1266eefd MC |
910 | hlen = F5_WORKAROUND_MAX_MSG_LEN - hlen; |
911 | ||
912 | /* | |
913 | * Take off the size of extension header itself (2 bytes for type and | |
10ed1b72 TS |
914 | * 2 bytes for length bytes), but ensure that the extension is at least |
915 | * 1 byte long so as not to have an empty extension last (WebSphere 7.x, | |
916 | * 8.x are intolerant of that condition) | |
1266eefd | 917 | */ |
3d85c7f4 | 918 | if (hlen > 4) |
ab83e314 MC |
919 | hlen -= 4; |
920 | else | |
10ed1b72 | 921 | hlen = 1; |
ab83e314 MC |
922 | |
923 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_padding) | |
924 | || !WPACKET_sub_allocate_bytes_u16(pkt, hlen, &padbytes)) { | |
f63a17d6 MC |
925 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PADDING, |
926 | ERR_R_INTERNAL_ERROR); | |
eb5fd03b | 927 | return EXT_RETURN_FAIL; |
ab83e314 MC |
928 | } |
929 | memset(padbytes, 0, hlen); | |
930 | } | |
931 | ||
b186a592 | 932 | return EXT_RETURN_SENT; |
ab83e314 MC |
933 | } |
934 | ||
ec15acb6 MC |
935 | /* |
936 | * Construct the pre_shared_key extension | |
937 | */ | |
b186a592 | 938 | EXT_RETURN tls_construct_ctos_psk(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 939 | X509 *x, size_t chainidx) |
ec15acb6 MC |
940 | { |
941 | #ifndef OPENSSL_NO_TLS1_3 | |
15b1688a | 942 | uint32_t now, agesec, agems = 0; |
add8d0e9 | 943 | size_t reshashsize = 0, pskhashsize = 0, binderoffset, msglen; |
9368f865 | 944 | unsigned char *resbinder = NULL, *pskbinder = NULL, *msgstart = NULL; |
15b1688a | 945 | const EVP_MD *handmd = NULL, *mdres = NULL, *mdpsk = NULL; |
9368f865 | 946 | int dores = 0; |
ec15acb6 MC |
947 | |
948 | s->session->ext.tick_identity = TLSEXT_PSK_BAD_IDENTITY; | |
949 | ||
d702ad12 MC |
950 | /* |
951 | * Note: At this stage of the code we only support adding a single | |
952 | * resumption PSK. If we add support for multiple PSKs then the length | |
953 | * calculations in the padding extension will need to be adjusted. | |
954 | */ | |
955 | ||
ec15acb6 | 956 | /* |
08191294 MC |
957 | * If this is an incompatible or new session then we have nothing to resume |
958 | * so don't add this extension. | |
ec15acb6 | 959 | */ |
08191294 | 960 | if (s->session->ssl_version != TLS1_3_VERSION |
add8d0e9 | 961 | || (s->session->ext.ticklen == 0 && s->psksession == NULL)) |
b186a592 | 962 | return EXT_RETURN_NOT_SENT; |
ec15acb6 | 963 | |
fc7129dc | 964 | if (s->hello_retry_request == SSL_HRR_PENDING) |
9368f865 MC |
965 | handmd = ssl_handshake_md(s); |
966 | ||
9368f865 | 967 | if (s->session->ext.ticklen != 0) { |
72257204 | 968 | /* Get the digest associated with the ciphersuite in the session */ |
9368f865 | 969 | if (s->session->cipher == NULL) { |
f63a17d6 MC |
970 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK, |
971 | ERR_R_INTERNAL_ERROR); | |
635c8f77 | 972 | return EXT_RETURN_FAIL; |
9368f865 | 973 | } |
9368f865 MC |
974 | mdres = ssl_md(s->session->cipher->algorithm2); |
975 | if (mdres == NULL) { | |
72257204 MC |
976 | /* |
977 | * Don't recognize this cipher so we can't use the session. | |
978 | * Ignore it | |
979 | */ | |
9368f865 MC |
980 | goto dopsksess; |
981 | } | |
982 | ||
fc7129dc | 983 | if (s->hello_retry_request == SSL_HRR_PENDING && mdres != handmd) { |
9368f865 | 984 | /* |
72257204 MC |
985 | * Selected ciphersuite hash does not match the hash for the session |
986 | * so we can't use it. | |
9368f865 MC |
987 | */ |
988 | goto dopsksess; | |
989 | } | |
1f5b44e9 | 990 | |
cf3e221b | 991 | /* |
9368f865 | 992 | * Technically the C standard just says time() returns a time_t and says |
72257204 MC |
993 | * nothing about the encoding of that type. In practice most |
994 | * implementations follow POSIX which holds it as an integral type in | |
995 | * seconds since epoch. We've already made the assumption that we can do | |
996 | * this in multiple places in the code, so portability shouldn't be an | |
997 | * issue. | |
cf3e221b | 998 | */ |
9368f865 MC |
999 | now = (uint32_t)time(NULL); |
1000 | agesec = now - (uint32_t)s->session->time; | |
7e70213f MC |
1001 | /* |
1002 | * We calculate the age in seconds but the server may work in ms. Due to | |
1003 | * rounding errors we could overestimate the age by up to 1s. It is | |
1004 | * better to underestimate it. Otherwise, if the RTT is very short, when | |
1005 | * the server calculates the age reported by the client it could be | |
1006 | * bigger than the age calculated on the server - which should never | |
1007 | * happen. | |
1008 | */ | |
1009 | if (agesec > 0) | |
1010 | agesec--; | |
cf3e221b | 1011 | |
9368f865 MC |
1012 | if (s->session->ext.tick_lifetime_hint < agesec) { |
1013 | /* Ticket is too old. Ignore it. */ | |
1014 | goto dopsksess; | |
1015 | } | |
ec15acb6 | 1016 | |
9368f865 MC |
1017 | /* |
1018 | * Calculate age in ms. We're just doing it to nearest second. Should be | |
1019 | * good enough. | |
1020 | */ | |
1021 | agems = agesec * (uint32_t)1000; | |
fc24f0bf | 1022 | |
9368f865 MC |
1023 | if (agesec != 0 && agems / (uint32_t)1000 != agesec) { |
1024 | /* | |
72257204 MC |
1025 | * Overflow. Shouldn't happen unless this is a *really* old session. |
1026 | * If so we just ignore it. | |
9368f865 MC |
1027 | */ |
1028 | goto dopsksess; | |
1029 | } | |
ec15acb6 | 1030 | |
ec15acb6 | 1031 | /* |
72257204 MC |
1032 | * Obfuscate the age. Overflow here is fine, this addition is supposed |
1033 | * to be mod 2^32. | |
ec15acb6 | 1034 | */ |
9368f865 MC |
1035 | agems += s->session->ext.tick_age_add; |
1036 | ||
1037 | reshashsize = EVP_MD_size(mdres); | |
1038 | dores = 1; | |
ec15acb6 MC |
1039 | } |
1040 | ||
9368f865 | 1041 | dopsksess: |
add8d0e9 | 1042 | if (!dores && s->psksession == NULL) |
9368f865 | 1043 | return EXT_RETURN_NOT_SENT; |
ec15acb6 | 1044 | |
add8d0e9 MC |
1045 | if (s->psksession != NULL) { |
1046 | mdpsk = ssl_md(s->psksession->cipher->algorithm2); | |
9368f865 MC |
1047 | if (mdpsk == NULL) { |
1048 | /* | |
1049 | * Don't recognize this cipher so we can't use the session. | |
1050 | * If this happens it's an application bug. | |
1051 | */ | |
f63a17d6 MC |
1052 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK, |
1053 | SSL_R_BAD_PSK); | |
635c8f77 | 1054 | return EXT_RETURN_FAIL; |
9368f865 MC |
1055 | } |
1056 | ||
fc7129dc | 1057 | if (s->hello_retry_request == SSL_HRR_PENDING && mdpsk != handmd) { |
9368f865 MC |
1058 | /* |
1059 | * Selected ciphersuite hash does not match the hash for the PSK | |
1060 | * session. This is an application bug. | |
1061 | */ | |
f63a17d6 MC |
1062 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK, |
1063 | SSL_R_BAD_PSK); | |
635c8f77 | 1064 | return EXT_RETURN_FAIL; |
9368f865 MC |
1065 | } |
1066 | ||
1067 | pskhashsize = EVP_MD_size(mdpsk); | |
1068 | } | |
ec15acb6 MC |
1069 | |
1070 | /* Create the extension, but skip over the binder for now */ | |
1071 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk) | |
1072 | || !WPACKET_start_sub_packet_u16(pkt) | |
9368f865 | 1073 | || !WPACKET_start_sub_packet_u16(pkt)) { |
f63a17d6 MC |
1074 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK, |
1075 | ERR_R_INTERNAL_ERROR); | |
635c8f77 | 1076 | return EXT_RETURN_FAIL; |
9368f865 MC |
1077 | } |
1078 | ||
1079 | if (dores) { | |
1080 | if (!WPACKET_sub_memcpy_u16(pkt, s->session->ext.tick, | |
1081 | s->session->ext.ticklen) | |
1082 | || !WPACKET_put_bytes_u32(pkt, agems)) { | |
f63a17d6 MC |
1083 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK, |
1084 | ERR_R_INTERNAL_ERROR); | |
635c8f77 | 1085 | return EXT_RETURN_FAIL; |
9368f865 MC |
1086 | } |
1087 | } | |
1088 | ||
add8d0e9 MC |
1089 | if (s->psksession != NULL) { |
1090 | if (!WPACKET_sub_memcpy_u16(pkt, s->psksession_id, | |
1091 | s->psksession_id_len) | |
9368f865 | 1092 | || !WPACKET_put_bytes_u32(pkt, 0)) { |
f63a17d6 MC |
1093 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK, |
1094 | ERR_R_INTERNAL_ERROR); | |
635c8f77 | 1095 | return EXT_RETURN_FAIL; |
9368f865 MC |
1096 | } |
1097 | } | |
1098 | ||
1099 | if (!WPACKET_close(pkt) | |
ec15acb6 MC |
1100 | || !WPACKET_get_total_written(pkt, &binderoffset) |
1101 | || !WPACKET_start_sub_packet_u16(pkt) | |
9368f865 MC |
1102 | || (dores |
1103 | && !WPACKET_sub_allocate_bytes_u8(pkt, reshashsize, &resbinder)) | |
add8d0e9 | 1104 | || (s->psksession != NULL |
9368f865 | 1105 | && !WPACKET_sub_allocate_bytes_u8(pkt, pskhashsize, &pskbinder)) |
ec15acb6 MC |
1106 | || !WPACKET_close(pkt) |
1107 | || !WPACKET_close(pkt) | |
1108 | || !WPACKET_get_total_written(pkt, &msglen) | |
1109 | /* | |
1110 | * We need to fill in all the sub-packet lengths now so we can | |
1111 | * calculate the HMAC of the message up to the binders | |
1112 | */ | |
1113 | || !WPACKET_fill_lengths(pkt)) { | |
f63a17d6 MC |
1114 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK, |
1115 | ERR_R_INTERNAL_ERROR); | |
635c8f77 | 1116 | return EXT_RETURN_FAIL; |
ec15acb6 MC |
1117 | } |
1118 | ||
1119 | msgstart = WPACKET_get_curr(pkt) - msglen; | |
1120 | ||
72257204 MC |
1121 | if (dores |
1122 | && tls_psk_do_binder(s, mdres, msgstart, binderoffset, NULL, | |
1123 | resbinder, s->session, 1, 0) != 1) { | |
635c8f77 MC |
1124 | /* SSLfatal() already called */ |
1125 | return EXT_RETURN_FAIL; | |
ec15acb6 MC |
1126 | } |
1127 | ||
add8d0e9 | 1128 | if (s->psksession != NULL |
72257204 | 1129 | && tls_psk_do_binder(s, mdpsk, msgstart, binderoffset, NULL, |
add8d0e9 | 1130 | pskbinder, s->psksession, 1, 1) != 1) { |
635c8f77 MC |
1131 | /* SSLfatal() already called */ |
1132 | return EXT_RETURN_FAIL; | |
9368f865 MC |
1133 | } |
1134 | ||
1135 | if (dores) | |
1136 | s->session->ext.tick_identity = 0; | |
add8d0e9 | 1137 | if (s->psksession != NULL) |
9368f865 | 1138 | s->psksession->ext.tick_identity = (dores ? 1 : 0); |
ec15acb6 | 1139 | |
635c8f77 | 1140 | return EXT_RETURN_SENT; |
ec15acb6 | 1141 | #else |
89bc9cf6 | 1142 | return EXT_RETURN_NOT_SENT; |
ec15acb6 MC |
1143 | #endif |
1144 | } | |
1145 | ||
9d75dce3 TS |
1146 | EXT_RETURN tls_construct_ctos_post_handshake_auth(SSL *s, WPACKET *pkt, |
1147 | unsigned int context, | |
1148 | X509 *x, size_t chainidx) | |
1149 | { | |
1150 | #ifndef OPENSSL_NO_TLS1_3 | |
1151 | if (!s->pha_forced) { | |
1152 | int i, n = 0; | |
1153 | ||
1154 | /* check for cert, if present, we can do post-handshake auth */ | |
1155 | if (s->cert == NULL) | |
1156 | return EXT_RETURN_NOT_SENT; | |
1157 | ||
1158 | for (i = 0; i < SSL_PKEY_NUM; i++) { | |
1159 | if (s->cert->pkeys[i].x509 != NULL | |
1160 | && s->cert->pkeys[i].privatekey != NULL) | |
1161 | n++; | |
1162 | } | |
1163 | ||
1164 | /* no identity certificates, so no extension */ | |
1165 | if (n == 0) | |
1166 | return EXT_RETURN_NOT_SENT; | |
1167 | } | |
1168 | ||
1169 | /* construct extension - 0 length, no contents */ | |
1170 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_post_handshake_auth) | |
1171 | || !WPACKET_start_sub_packet_u16(pkt) | |
1172 | || !WPACKET_close(pkt)) { | |
1173 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
1174 | SSL_F_TLS_CONSTRUCT_CTOS_POST_HANDSHAKE_AUTH, | |
1175 | ERR_R_INTERNAL_ERROR); | |
1176 | return EXT_RETURN_FAIL; | |
1177 | } | |
1178 | ||
1179 | s->post_handshake_auth = SSL_PHA_EXT_SENT; | |
1180 | ||
1181 | return EXT_RETURN_SENT; | |
1182 | #else | |
1183 | return EXT_RETURN_NOT_SENT; | |
1184 | #endif | |
1185 | } | |
1186 | ||
1187 | ||
6dd083fd MC |
1188 | /* |
1189 | * Parse the server's renegotiation binding and abort if it's not right | |
1190 | */ | |
61138358 | 1191 | int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 1192 | X509 *x, size_t chainidx) |
6dd083fd MC |
1193 | { |
1194 | size_t expected_len = s->s3->previous_client_finished_len | |
1195 | + s->s3->previous_server_finished_len; | |
1196 | size_t ilen; | |
1197 | const unsigned char *data; | |
1198 | ||
1199 | /* Check for logic errors */ | |
b77f3ed1 MC |
1200 | if (!ossl_assert(expected_len == 0 |
1201 | || s->s3->previous_client_finished_len != 0) | |
1202 | || !ossl_assert(expected_len == 0 | |
1203 | || s->s3->previous_server_finished_len != 0)) { | |
f63a17d6 MC |
1204 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
1205 | ERR_R_INTERNAL_ERROR); | |
b77f3ed1 MC |
1206 | return 0; |
1207 | } | |
6dd083fd MC |
1208 | |
1209 | /* Parse the length byte */ | |
1210 | if (!PACKET_get_1_len(pkt, &ilen)) { | |
f63a17d6 MC |
1211 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
1212 | SSL_R_RENEGOTIATION_ENCODING_ERR); | |
6dd083fd MC |
1213 | return 0; |
1214 | } | |
1215 | ||
1216 | /* Consistency check */ | |
1217 | if (PACKET_remaining(pkt) != ilen) { | |
f63a17d6 MC |
1218 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
1219 | SSL_R_RENEGOTIATION_ENCODING_ERR); | |
6dd083fd MC |
1220 | return 0; |
1221 | } | |
1222 | ||
1223 | /* Check that the extension matches */ | |
1224 | if (ilen != expected_len) { | |
f63a17d6 MC |
1225 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
1226 | SSL_R_RENEGOTIATION_MISMATCH); | |
6dd083fd MC |
1227 | return 0; |
1228 | } | |
1229 | ||
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) { | |
f63a17d6 MC |
1233 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
1234 | SSL_R_RENEGOTIATION_MISMATCH); | |
6dd083fd MC |
1235 | return 0; |
1236 | } | |
1237 | ||
1238 | if (!PACKET_get_bytes(pkt, &data, s->s3->previous_server_finished_len) | |
1239 | || memcmp(data, s->s3->previous_server_finished, | |
1240 | s->s3->previous_server_finished_len) != 0) { | |
f63a17d6 MC |
1241 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
1242 | SSL_R_RENEGOTIATION_MISMATCH); | |
6dd083fd MC |
1243 | return 0; |
1244 | } | |
1245 | s->s3->send_connection_binding = 1; | |
1246 | ||
1247 | return 1; | |
1248 | } | |
1249 | ||
cf72c757 F |
1250 | /* Parse the server's max fragment len extension packet */ |
1251 | int tls_parse_stoc_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context, | |
f63a17d6 | 1252 | X509 *x, size_t chainidx) |
cf72c757 F |
1253 | { |
1254 | unsigned int value; | |
1255 | ||
1256 | if (PACKET_remaining(pkt) != 1 || !PACKET_get_1(pkt, &value)) { | |
56d36288 | 1257 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_MAXFRAGMENTLEN, |
f63a17d6 | 1258 | SSL_R_BAD_EXTENSION); |
cf72c757 F |
1259 | return 0; |
1260 | } | |
1261 | ||
1262 | /* |value| should contains a valid max-fragment-length code. */ | |
1263 | if (!IS_MAX_FRAGMENT_LENGTH_EXT_VALID(value)) { | |
f63a17d6 MC |
1264 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1265 | SSL_F_TLS_PARSE_STOC_MAXFRAGMENTLEN, | |
1266 | SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); | |
cf72c757 F |
1267 | return 0; |
1268 | } | |
1269 | ||
1270 | /* Must be the same value as client-configured one who was sent to server */ | |
1271 | /*- | |
1272 | * RFC 6066: if a client receives a maximum fragment length negotiation | |
1273 | * response that differs from the length it requested, ... | |
1274 | * It must abort with SSL_AD_ILLEGAL_PARAMETER alert | |
1275 | */ | |
1276 | if (value != s->ext.max_fragment_len_mode) { | |
f63a17d6 MC |
1277 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1278 | SSL_F_TLS_PARSE_STOC_MAXFRAGMENTLEN, | |
1279 | SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); | |
cf72c757 F |
1280 | return 0; |
1281 | } | |
1282 | ||
1283 | /* | |
1284 | * Maximum Fragment Length Negotiation succeeded. | |
1285 | * The negotiated Maximum Fragment Length is binding now. | |
1286 | */ | |
1287 | s->session->ext.max_fragment_len_mode = value; | |
1288 | ||
1289 | return 1; | |
1290 | } | |
1291 | ||
61138358 | 1292 | int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 1293 | X509 *x, size_t chainidx) |
6dd083fd | 1294 | { |
fb34a0f4 | 1295 | if (s->ext.hostname == NULL) { |
f63a17d6 MC |
1296 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_SERVER_NAME, |
1297 | ERR_R_INTERNAL_ERROR); | |
fb34a0f4 MC |
1298 | return 0; |
1299 | } | |
1300 | ||
1301 | if (PACKET_remaining(pkt) > 0) { | |
f63a17d6 MC |
1302 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_SERVER_NAME, |
1303 | SSL_R_BAD_EXTENSION); | |
6dd083fd MC |
1304 | return 0; |
1305 | } | |
1306 | ||
1307 | if (!s->hit) { | |
aff8c126 | 1308 | if (s->session->ext.hostname != NULL) { |
f63a17d6 MC |
1309 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_SERVER_NAME, |
1310 | ERR_R_INTERNAL_ERROR); | |
6dd083fd MC |
1311 | return 0; |
1312 | } | |
aff8c126 RS |
1313 | s->session->ext.hostname = OPENSSL_strdup(s->ext.hostname); |
1314 | if (s->session->ext.hostname == NULL) { | |
f63a17d6 MC |
1315 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_SERVER_NAME, |
1316 | ERR_R_INTERNAL_ERROR); | |
6dd083fd MC |
1317 | return 0; |
1318 | } | |
1319 | } | |
1320 | ||
1321 | return 1; | |
1322 | } | |
1323 | ||
1324 | #ifndef OPENSSL_NO_EC | |
61138358 | 1325 | int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 1326 | X509 *x, size_t chainidx) |
6dd083fd | 1327 | { |
848a950b | 1328 | size_t ecpointformats_len; |
6dd083fd MC |
1329 | PACKET ecptformatlist; |
1330 | ||
1331 | if (!PACKET_as_length_prefixed_1(pkt, &ecptformatlist)) { | |
f63a17d6 MC |
1332 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS, |
1333 | SSL_R_BAD_EXTENSION); | |
6dd083fd MC |
1334 | return 0; |
1335 | } | |
1336 | if (!s->hit) { | |
aff8c126 | 1337 | ecpointformats_len = PACKET_remaining(&ecptformatlist); |
848a950b MC |
1338 | if (ecpointformats_len == 0) { |
1339 | SSLfatal(s, SSL_AD_DECODE_ERROR, | |
1340 | SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS, SSL_R_BAD_LENGTH); | |
1341 | return 0; | |
1342 | } | |
6dd083fd | 1343 | |
848a950b | 1344 | s->session->ext.ecpointformats_len = 0; |
aff8c126 RS |
1345 | OPENSSL_free(s->session->ext.ecpointformats); |
1346 | s->session->ext.ecpointformats = OPENSSL_malloc(ecpointformats_len); | |
1347 | if (s->session->ext.ecpointformats == NULL) { | |
f63a17d6 MC |
1348 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1349 | SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR); | |
6dd083fd MC |
1350 | return 0; |
1351 | } | |
1352 | ||
aff8c126 | 1353 | s->session->ext.ecpointformats_len = ecpointformats_len; |
6dd083fd MC |
1354 | |
1355 | if (!PACKET_copy_bytes(&ecptformatlist, | |
aff8c126 RS |
1356 | s->session->ext.ecpointformats, |
1357 | ecpointformats_len)) { | |
f63a17d6 MC |
1358 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1359 | SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR); | |
6dd083fd MC |
1360 | return 0; |
1361 | } | |
1362 | } | |
1363 | ||
1364 | return 1; | |
1365 | } | |
1366 | #endif | |
1367 | ||
61138358 | 1368 | int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 1369 | X509 *x, size_t chainidx) |
6dd083fd | 1370 | { |
aff8c126 RS |
1371 | if (s->ext.session_ticket_cb != NULL && |
1372 | !s->ext.session_ticket_cb(s, PACKET_data(pkt), | |
1373 | PACKET_remaining(pkt), | |
1374 | s->ext.session_ticket_cb_arg)) { | |
f63a17d6 MC |
1375 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
1376 | SSL_F_TLS_PARSE_STOC_SESSION_TICKET, SSL_R_BAD_EXTENSION); | |
6dd083fd MC |
1377 | return 0; |
1378 | } | |
1266eefd | 1379 | |
fb34a0f4 | 1380 | if (!tls_use_ticket(s)) { |
f63a17d6 MC |
1381 | SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION, |
1382 | SSL_F_TLS_PARSE_STOC_SESSION_TICKET, SSL_R_BAD_EXTENSION); | |
6dd083fd MC |
1383 | return 0; |
1384 | } | |
fb34a0f4 | 1385 | if (PACKET_remaining(pkt) > 0) { |
f63a17d6 MC |
1386 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
1387 | SSL_F_TLS_PARSE_STOC_SESSION_TICKET, SSL_R_BAD_EXTENSION); | |
fb34a0f4 MC |
1388 | return 0; |
1389 | } | |
1266eefd | 1390 | |
aff8c126 | 1391 | s->ext.ticket_expected = 1; |
6dd083fd MC |
1392 | |
1393 | return 1; | |
1394 | } | |
1395 | ||
ab83e314 | 1396 | #ifndef OPENSSL_NO_OCSP |
61138358 | 1397 | int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 1398 | X509 *x, size_t chainidx) |
6dd083fd MC |
1399 | { |
1400 | /* | |
f63e4288 MC |
1401 | * MUST only be sent if we've requested a status |
1402 | * request message. In TLS <= 1.2 it must also be empty. | |
6dd083fd | 1403 | */ |
fb34a0f4 | 1404 | if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) { |
f63a17d6 MC |
1405 | SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION, |
1406 | SSL_F_TLS_PARSE_STOC_STATUS_REQUEST, SSL_R_BAD_EXTENSION); | |
6dd083fd MC |
1407 | return 0; |
1408 | } | |
fb34a0f4 | 1409 | if (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) > 0) { |
f63a17d6 MC |
1410 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
1411 | SSL_F_TLS_PARSE_STOC_STATUS_REQUEST, SSL_R_BAD_EXTENSION); | |
fb34a0f4 MC |
1412 | return 0; |
1413 | } | |
f63e4288 MC |
1414 | |
1415 | if (SSL_IS_TLS13(s)) { | |
1416 | /* We only know how to handle this if it's for the first Certificate in | |
1ee4b98e | 1417 | * the chain. We ignore any other responses. |
f63e4288 | 1418 | */ |
8521ced6 | 1419 | if (chainidx != 0) |
f63e4288 | 1420 | return 1; |
f63a17d6 MC |
1421 | |
1422 | /* SSLfatal() already called */ | |
1423 | return tls_process_cert_status_body(s, pkt); | |
f63e4288 MC |
1424 | } |
1425 | ||
6dd083fd | 1426 | /* Set flag to expect CertificateStatus message */ |
aff8c126 | 1427 | s->ext.status_expected = 1; |
6dd083fd MC |
1428 | |
1429 | return 1; | |
1430 | } | |
ab83e314 | 1431 | #endif |
6dd083fd MC |
1432 | |
1433 | ||
1434 | #ifndef OPENSSL_NO_CT | |
61138358 | 1435 | int tls_parse_stoc_sct(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1436 | size_t chainidx) |
6dd083fd MC |
1437 | { |
1438 | /* | |
1439 | * Only take it if we asked for it - i.e if there is no CT validation | |
1440 | * callback set, then a custom extension MAY be processing it, so we | |
1441 | * need to let control continue to flow to that. | |
1442 | */ | |
1443 | if (s->ct_validation_callback != NULL) { | |
1444 | size_t size = PACKET_remaining(pkt); | |
1445 | ||
1446 | /* Simply copy it off for later processing */ | |
aff8c126 RS |
1447 | OPENSSL_free(s->ext.scts); |
1448 | s->ext.scts = NULL; | |
1266eefd | 1449 | |
3a63c0ed | 1450 | s->ext.scts_len = (uint16_t)size; |
6dd083fd | 1451 | if (size > 0) { |
aff8c126 RS |
1452 | s->ext.scts = OPENSSL_malloc(size); |
1453 | if (s->ext.scts == NULL | |
1454 | || !PACKET_copy_bytes(pkt, s->ext.scts, size)) { | |
f63a17d6 MC |
1455 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_SCT, |
1456 | ERR_R_INTERNAL_ERROR); | |
6dd083fd MC |
1457 | return 0; |
1458 | } | |
1459 | } | |
1460 | } else { | |
b186a592 MC |
1461 | ENDPOINT role = (context & SSL_EXT_TLS1_2_SERVER_HELLO) != 0 |
1462 | ? ENDPOINT_CLIENT : ENDPOINT_BOTH; | |
1463 | ||
1464 | /* | |
1465 | * If we didn't ask for it then there must be a custom extension, | |
1466 | * otherwise this is unsolicited. | |
1467 | */ | |
1468 | if (custom_ext_find(&s->cert->custext, role, | |
1469 | TLSEXT_TYPE_signed_certificate_timestamp, | |
1470 | NULL) == NULL) { | |
f63a17d6 MC |
1471 | SSLfatal(s, TLS1_AD_UNSUPPORTED_EXTENSION, SSL_F_TLS_PARSE_STOC_SCT, |
1472 | SSL_R_BAD_EXTENSION); | |
b186a592 MC |
1473 | return 0; |
1474 | } | |
1475 | ||
f63a17d6 | 1476 | if (!custom_ext_parse(s, context, |
43ae5eed MC |
1477 | TLSEXT_TYPE_signed_certificate_timestamp, |
1478 | PACKET_data(pkt), PACKET_remaining(pkt), | |
f63a17d6 MC |
1479 | x, chainidx)) { |
1480 | /* SSLfatal already called */ | |
6dd083fd | 1481 | return 0; |
f63a17d6 | 1482 | } |
6dd083fd MC |
1483 | } |
1484 | ||
1485 | return 1; | |
1486 | } | |
1487 | #endif | |
1488 | ||
1489 | ||
1490 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
1491 | /* | |
1492 | * ssl_next_proto_validate validates a Next Protocol Negotiation block. No | |
1493 | * elements of zero length are allowed and the set of elements must exactly | |
1494 | * fill the length of the block. Returns 1 on success or 0 on failure. | |
1495 | */ | |
f63a17d6 | 1496 | static int ssl_next_proto_validate(SSL *s, PACKET *pkt) |
6dd083fd MC |
1497 | { |
1498 | PACKET tmp_protocol; | |
1499 | ||
1500 | while (PACKET_remaining(pkt)) { | |
1501 | if (!PACKET_get_length_prefixed_1(pkt, &tmp_protocol) | |
f63a17d6 MC |
1502 | || PACKET_remaining(&tmp_protocol) == 0) { |
1503 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_SSL_NEXT_PROTO_VALIDATE, | |
1504 | SSL_R_BAD_EXTENSION); | |
6dd083fd | 1505 | return 0; |
f63a17d6 | 1506 | } |
6dd083fd MC |
1507 | } |
1508 | ||
1509 | return 1; | |
1510 | } | |
1511 | ||
61138358 | 1512 | int tls_parse_stoc_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1513 | size_t chainidx) |
6dd083fd MC |
1514 | { |
1515 | unsigned char *selected; | |
1516 | unsigned char selected_len; | |
1517 | PACKET tmppkt; | |
1518 | ||
1266eefd | 1519 | /* Check if we are in a renegotiation. If so ignore this extension */ |
c7f47786 | 1520 | if (!SSL_IS_FIRST_HANDSHAKE(s)) |
6dd083fd MC |
1521 | return 1; |
1522 | ||
1523 | /* We must have requested it. */ | |
aff8c126 | 1524 | if (s->ctx->ext.npn_select_cb == NULL) { |
f63a17d6 MC |
1525 | SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION, SSL_F_TLS_PARSE_STOC_NPN, |
1526 | SSL_R_BAD_EXTENSION); | |
6dd083fd MC |
1527 | return 0; |
1528 | } | |
1266eefd | 1529 | |
6dd083fd MC |
1530 | /* The data must be valid */ |
1531 | tmppkt = *pkt; | |
f63a17d6 MC |
1532 | if (!ssl_next_proto_validate(s, &tmppkt)) { |
1533 | /* SSLfatal() already called */ | |
6dd083fd MC |
1534 | return 0; |
1535 | } | |
aff8c126 RS |
1536 | if (s->ctx->ext.npn_select_cb(s, &selected, &selected_len, |
1537 | PACKET_data(pkt), | |
1538 | PACKET_remaining(pkt), | |
1539 | s->ctx->ext.npn_select_cb_arg) != | |
6dd083fd | 1540 | SSL_TLSEXT_ERR_OK) { |
f63a17d6 MC |
1541 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_PARSE_STOC_NPN, |
1542 | SSL_R_BAD_EXTENSION); | |
6dd083fd MC |
1543 | return 0; |
1544 | } | |
1266eefd | 1545 | |
6dd083fd MC |
1546 | /* |
1547 | * Could be non-NULL if server has sent multiple NPN extensions in | |
1548 | * a single Serverhello | |
1549 | */ | |
aff8c126 RS |
1550 | OPENSSL_free(s->ext.npn); |
1551 | s->ext.npn = OPENSSL_malloc(selected_len); | |
1552 | if (s->ext.npn == NULL) { | |
f63a17d6 MC |
1553 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_NPN, |
1554 | ERR_R_INTERNAL_ERROR); | |
6dd083fd MC |
1555 | return 0; |
1556 | } | |
1557 | ||
aff8c126 RS |
1558 | memcpy(s->ext.npn, selected, selected_len); |
1559 | s->ext.npn_len = selected_len; | |
1560 | s->s3->npn_seen = 1; | |
6dd083fd MC |
1561 | |
1562 | return 1; | |
1563 | } | |
1564 | #endif | |
1565 | ||
61138358 | 1566 | int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1567 | size_t chainidx) |
6dd083fd MC |
1568 | { |
1569 | size_t len; | |
1570 | ||
1571 | /* We must have requested it. */ | |
1572 | if (!s->s3->alpn_sent) { | |
f63a17d6 MC |
1573 | SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION, SSL_F_TLS_PARSE_STOC_ALPN, |
1574 | SSL_R_BAD_EXTENSION); | |
6dd083fd MC |
1575 | return 0; |
1576 | } | |
1577 | /*- | |
1578 | * The extension data consists of: | |
1579 | * uint16 list_length | |
1580 | * uint8 proto_length; | |
1581 | * uint8 proto[proto_length]; | |
1582 | */ | |
1583 | if (!PACKET_get_net_2_len(pkt, &len) | |
1584 | || PACKET_remaining(pkt) != len || !PACKET_get_1_len(pkt, &len) | |
1585 | || PACKET_remaining(pkt) != len) { | |
f63a17d6 MC |
1586 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_ALPN, |
1587 | SSL_R_BAD_EXTENSION); | |
6dd083fd MC |
1588 | return 0; |
1589 | } | |
1590 | OPENSSL_free(s->s3->alpn_selected); | |
1591 | s->s3->alpn_selected = OPENSSL_malloc(len); | |
1592 | if (s->s3->alpn_selected == NULL) { | |
f63a17d6 MC |
1593 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_ALPN, |
1594 | ERR_R_INTERNAL_ERROR); | |
6dd083fd MC |
1595 | return 0; |
1596 | } | |
1597 | if (!PACKET_copy_bytes(pkt, s->s3->alpn_selected, len)) { | |
f63a17d6 MC |
1598 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_ALPN, |
1599 | SSL_R_BAD_EXTENSION); | |
6dd083fd MC |
1600 | return 0; |
1601 | } | |
1602 | s->s3->alpn_selected_len = len; | |
1603 | ||
0ef28021 MC |
1604 | if (s->session->ext.alpn_selected == NULL |
1605 | || s->session->ext.alpn_selected_len != len | |
1606 | || memcmp(s->session->ext.alpn_selected, s->s3->alpn_selected, len) | |
1607 | != 0) { | |
4be3a7c7 MC |
1608 | /* ALPN not consistent with the old session so cannot use early_data */ |
1609 | s->ext.early_data_ok = 0; | |
1610 | } | |
1611 | if (!s->hit) { | |
1612 | /* If a new session then update it with the selected ALPN */ | |
1613 | s->session->ext.alpn_selected = | |
1614 | OPENSSL_memdup(s->s3->alpn_selected, s->s3->alpn_selected_len); | |
1615 | if (s->session->ext.alpn_selected == NULL) { | |
f63a17d6 MC |
1616 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_ALPN, |
1617 | ERR_R_INTERNAL_ERROR); | |
4be3a7c7 MC |
1618 | return 0; |
1619 | } | |
1620 | s->session->ext.alpn_selected_len = s->s3->alpn_selected_len; | |
ae8d7d99 MC |
1621 | } |
1622 | ||
6dd083fd MC |
1623 | return 1; |
1624 | } | |
1625 | ||
1626 | #ifndef OPENSSL_NO_SRTP | |
61138358 | 1627 | int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1628 | size_t chainidx) |
6dd083fd MC |
1629 | { |
1630 | unsigned int id, ct, mki; | |
1631 | int i; | |
1632 | STACK_OF(SRTP_PROTECTION_PROFILE) *clnt; | |
1633 | SRTP_PROTECTION_PROFILE *prof; | |
1634 | ||
1266eefd MC |
1635 | if (!PACKET_get_net_2(pkt, &ct) || ct != 2 |
1636 | || !PACKET_get_net_2(pkt, &id) | |
1637 | || !PACKET_get_1(pkt, &mki) | |
1638 | || PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
1639 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_USE_SRTP, |
1640 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); | |
6dd083fd MC |
1641 | return 0; |
1642 | } | |
1643 | ||
1644 | if (mki != 0) { | |
1645 | /* Must be no MKI, since we never offer one */ | |
f63a17d6 MC |
1646 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_USE_SRTP, |
1647 | SSL_R_BAD_SRTP_MKI_VALUE); | |
6dd083fd MC |
1648 | return 0; |
1649 | } | |
1650 | ||
6dd083fd | 1651 | /* Throw an error if the server gave us an unsolicited extension */ |
1266eefd | 1652 | clnt = SSL_get_srtp_profiles(s); |
6dd083fd | 1653 | if (clnt == NULL) { |
f63a17d6 MC |
1654 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_USE_SRTP, |
1655 | SSL_R_NO_SRTP_PROFILES); | |
6dd083fd MC |
1656 | return 0; |
1657 | } | |
1658 | ||
1659 | /* | |
1660 | * Check to see if the server gave us something we support (and | |
1661 | * presumably offered) | |
1662 | */ | |
1663 | for (i = 0; i < sk_SRTP_PROTECTION_PROFILE_num(clnt); i++) { | |
1664 | prof = sk_SRTP_PROTECTION_PROFILE_value(clnt, i); | |
1665 | ||
1666 | if (prof->id == id) { | |
1667 | s->srtp_profile = prof; | |
6dd083fd MC |
1668 | return 1; |
1669 | } | |
1670 | } | |
1671 | ||
f63a17d6 MC |
1672 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_USE_SRTP, |
1673 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); | |
6dd083fd MC |
1674 | return 0; |
1675 | } | |
1676 | #endif | |
1677 | ||
61138358 | 1678 | int tls_parse_stoc_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1679 | size_t chainidx) |
6dd083fd MC |
1680 | { |
1681 | /* Ignore if inappropriate ciphersuite */ | |
1682 | if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC) | |
1683 | && s->s3->tmp.new_cipher->algorithm_mac != SSL_AEAD | |
1684 | && s->s3->tmp.new_cipher->algorithm_enc != SSL_RC4) | |
28a31a0a | 1685 | s->ext.use_etm = 1; |
6dd083fd MC |
1686 | |
1687 | return 1; | |
1688 | } | |
1689 | ||
61138358 | 1690 | int tls_parse_stoc_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1691 | size_t chainidx) |
6dd083fd MC |
1692 | { |
1693 | s->s3->flags |= TLS1_FLAGS_RECEIVED_EXTMS; | |
1694 | if (!s->hit) | |
1695 | s->session->flags |= SSL_SESS_FLAG_EXTMS; | |
1696 | ||
1697 | return 1; | |
1698 | } | |
1699 | ||
88050dd1 MC |
1700 | int tls_parse_stoc_supported_versions(SSL *s, PACKET *pkt, unsigned int context, |
1701 | X509 *x, size_t chainidx) | |
1702 | { | |
1703 | unsigned int version; | |
1704 | ||
1705 | if (!PACKET_get_net_2(pkt, &version) | |
1706 | || PACKET_remaining(pkt) != 0) { | |
1707 | SSLfatal(s, SSL_AD_DECODE_ERROR, | |
1708 | SSL_F_TLS_PARSE_STOC_SUPPORTED_VERSIONS, | |
1709 | SSL_R_LENGTH_MISMATCH); | |
1710 | return 0; | |
1711 | } | |
1712 | ||
1713 | /* TODO(TLS1.3): Remove this before release */ | |
1714 | if (version == TLS1_3_VERSION_DRAFT) | |
1715 | version = TLS1_3_VERSION; | |
1716 | ||
426dfc9f MC |
1717 | /* We ignore this extension for HRRs except to sanity check it */ |
1718 | if (context == SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST) { | |
1719 | /* | |
1720 | * The only protocol version we support which has an HRR message is | |
1721 | * TLSv1.3, therefore we shouldn't be getting an HRR for anything else. | |
1722 | */ | |
1723 | if (version != TLS1_3_VERSION) { | |
5cc807da MC |
1724 | SSLfatal(s, SSL_AD_PROTOCOL_VERSION, |
1725 | SSL_F_TLS_PARSE_STOC_SUPPORTED_VERSIONS, | |
1726 | SSL_R_BAD_HRR_VERSION); | |
426dfc9f MC |
1727 | return 0; |
1728 | } | |
1729 | return 1; | |
1730 | } | |
1731 | ||
88050dd1 MC |
1732 | /* We just set it here. We validate it in ssl_choose_client_version */ |
1733 | s->version = version; | |
1734 | ||
1735 | return 1; | |
1736 | } | |
1737 | ||
61138358 | 1738 | int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1739 | size_t chainidx) |
6dd083fd | 1740 | { |
3cf96e88 | 1741 | #ifndef OPENSSL_NO_TLS1_3 |
6dd083fd MC |
1742 | unsigned int group_id; |
1743 | PACKET encoded_pt; | |
1744 | EVP_PKEY *ckey = s->s3->tmp.pkey, *skey = NULL; | |
1745 | ||
1746 | /* Sanity check */ | |
090c8118 | 1747 | if (ckey == NULL || s->s3->peer_tmp != NULL) { |
f63a17d6 MC |
1748 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_KEY_SHARE, |
1749 | ERR_R_INTERNAL_ERROR); | |
6dd083fd MC |
1750 | return 0; |
1751 | } | |
1752 | ||
1753 | if (!PACKET_get_net_2(pkt, &group_id)) { | |
f63a17d6 MC |
1754 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_KEY_SHARE, |
1755 | SSL_R_LENGTH_MISMATCH); | |
6dd083fd MC |
1756 | return 0; |
1757 | } | |
1758 | ||
fe874d27 | 1759 | if ((context & SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST) != 0) { |
f48d826e DSH |
1760 | const uint16_t *pgroups = NULL; |
1761 | size_t i, num_groups; | |
3847d426 MC |
1762 | |
1763 | if (PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
1764 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_KEY_SHARE, |
1765 | SSL_R_LENGTH_MISMATCH); | |
3847d426 MC |
1766 | return 0; |
1767 | } | |
1768 | ||
1769 | /* | |
1770 | * It is an error if the HelloRetryRequest wants a key_share that we | |
1771 | * already sent in the first ClientHello | |
1772 | */ | |
1773 | if (group_id == s->s3->group_id) { | |
f63a17d6 MC |
1774 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1775 | SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE); | |
3847d426 MC |
1776 | return 0; |
1777 | } | |
1778 | ||
1779 | /* Validate the selected group is one we support */ | |
f48d826e DSH |
1780 | tls1_get_supported_groups(s, &pgroups, &num_groups); |
1781 | for (i = 0; i < num_groups; i++) { | |
1782 | if (group_id == pgroups[i]) | |
3847d426 MC |
1783 | break; |
1784 | } | |
f48d826e | 1785 | if (i >= num_groups |
9e84a42d | 1786 | || !tls_curve_allowed(s, group_id, SSL_SECOP_CURVE_SUPPORTED)) { |
f63a17d6 MC |
1787 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1788 | SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE); | |
3847d426 MC |
1789 | return 0; |
1790 | } | |
1791 | ||
1792 | s->s3->group_id = group_id; | |
1793 | EVP_PKEY_free(s->s3->tmp.pkey); | |
1794 | s->s3->tmp.pkey = NULL; | |
1795 | return 1; | |
1796 | } | |
1797 | ||
6dd083fd MC |
1798 | if (group_id != s->s3->group_id) { |
1799 | /* | |
1800 | * This isn't for the group that we sent in the original | |
1801 | * key_share! | |
1802 | */ | |
f63a17d6 MC |
1803 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_KEY_SHARE, |
1804 | SSL_R_BAD_KEY_SHARE); | |
6dd083fd MC |
1805 | return 0; |
1806 | } | |
1807 | ||
1808 | if (!PACKET_as_length_prefixed_2(pkt, &encoded_pt) | |
1809 | || PACKET_remaining(&encoded_pt) == 0) { | |
f63a17d6 MC |
1810 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_KEY_SHARE, |
1811 | SSL_R_LENGTH_MISMATCH); | |
6dd083fd MC |
1812 | return 0; |
1813 | } | |
1814 | ||
1815 | skey = ssl_generate_pkey(ckey); | |
1816 | if (skey == NULL) { | |
f63a17d6 MC |
1817 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_KEY_SHARE, |
1818 | ERR_R_MALLOC_FAILURE); | |
6dd083fd MC |
1819 | return 0; |
1820 | } | |
1821 | if (!EVP_PKEY_set1_tls_encodedpoint(skey, PACKET_data(&encoded_pt), | |
1822 | PACKET_remaining(&encoded_pt))) { | |
f63a17d6 MC |
1823 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_KEY_SHARE, |
1824 | SSL_R_BAD_ECPOINT); | |
a1d6a0b6 | 1825 | EVP_PKEY_free(skey); |
6dd083fd MC |
1826 | return 0; |
1827 | } | |
1828 | ||
1829 | if (ssl_derive(s, ckey, skey, 1) == 0) { | |
f63a17d6 | 1830 | /* SSLfatal() already called */ |
6dd083fd MC |
1831 | EVP_PKEY_free(skey); |
1832 | return 0; | |
1833 | } | |
090c8118 | 1834 | s->s3->peer_tmp = skey; |
3cf96e88 | 1835 | #endif |
6dd083fd MC |
1836 | |
1837 | return 1; | |
1838 | } | |
4ff65f77 | 1839 | |
cfef5027 | 1840 | int tls_parse_stoc_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1841 | size_t chainidx) |
cfef5027 MC |
1842 | { |
1843 | PACKET cookie; | |
1844 | ||
1845 | if (!PACKET_as_length_prefixed_2(pkt, &cookie) | |
1846 | || !PACKET_memdup(&cookie, &s->ext.tls13_cookie, | |
1847 | &s->ext.tls13_cookie_len)) { | |
f63a17d6 MC |
1848 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_COOKIE, |
1849 | SSL_R_LENGTH_MISMATCH); | |
cfef5027 MC |
1850 | return 0; |
1851 | } | |
1852 | ||
1853 | return 1; | |
1854 | } | |
1855 | ||
38df5a45 | 1856 | int tls_parse_stoc_early_data(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 1857 | X509 *x, size_t chainidx) |
38df5a45 | 1858 | { |
fe874d27 | 1859 | if (context == SSL_EXT_TLS1_3_NEW_SESSION_TICKET) { |
6594189f MC |
1860 | unsigned long max_early_data; |
1861 | ||
1862 | if (!PACKET_get_net_4(pkt, &max_early_data) | |
1863 | || PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
1864 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_EARLY_DATA, |
1865 | SSL_R_INVALID_MAX_EARLY_DATA); | |
6594189f MC |
1866 | return 0; |
1867 | } | |
1868 | ||
1869 | s->session->ext.max_early_data = max_early_data; | |
1870 | ||
1871 | return 1; | |
1872 | } | |
1873 | ||
38df5a45 | 1874 | if (PACKET_remaining(pkt) != 0) { |
f63a17d6 MC |
1875 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_EARLY_DATA, |
1876 | SSL_R_BAD_EXTENSION); | |
38df5a45 MC |
1877 | return 0; |
1878 | } | |
1879 | ||
4be3a7c7 | 1880 | if (!s->ext.early_data_ok |
38df5a45 MC |
1881 | || !s->hit |
1882 | || s->session->ext.tick_identity != 0) { | |
1883 | /* | |
1884 | * If we get here then we didn't send early data, or we didn't resume | |
4be3a7c7 MC |
1885 | * using the first identity, or the SNI/ALPN is not consistent so the |
1886 | * server should not be accepting it. | |
38df5a45 | 1887 | */ |
f63a17d6 MC |
1888 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_EARLY_DATA, |
1889 | SSL_R_BAD_EXTENSION); | |
38df5a45 MC |
1890 | return 0; |
1891 | } | |
1892 | ||
1893 | s->ext.early_data = SSL_EARLY_DATA_ACCEPTED; | |
1894 | ||
1895 | return 1; | |
1896 | } | |
1897 | ||
61138358 | 1898 | int tls_parse_stoc_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1899 | size_t chainidx) |
4ff65f77 MC |
1900 | { |
1901 | #ifndef OPENSSL_NO_TLS1_3 | |
1902 | unsigned int identity; | |
1903 | ||
1904 | if (!PACKET_get_net_2(pkt, &identity) || PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
1905 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_PSK, |
1906 | SSL_R_LENGTH_MISMATCH); | |
4ff65f77 MC |
1907 | return 0; |
1908 | } | |
1909 | ||
9368f865 MC |
1910 | if (s->session->ext.tick_identity == (int)identity) { |
1911 | s->hit = 1; | |
1912 | SSL_SESSION_free(s->psksession); | |
1913 | s->psksession = NULL; | |
1914 | return 1; | |
1915 | } | |
1916 | ||
1917 | if (s->psksession == NULL | |
1918 | || s->psksession->ext.tick_identity != (int)identity) { | |
f63a17d6 MC |
1919 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_PSK, |
1920 | SSL_R_BAD_PSK_IDENTITY); | |
4ff65f77 MC |
1921 | return 0; |
1922 | } | |
1923 | ||
add8d0e9 MC |
1924 | /* |
1925 | * If we used the external PSK for sending early_data then s->early_secret | |
1926 | * is already set up, so don't overwrite it. Otherwise we copy the | |
1927 | * early_secret across that we generated earlier. | |
1928 | */ | |
1929 | if ((s->early_data_state != SSL_EARLY_DATA_WRITE_RETRY | |
1930 | && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING) | |
1931 | || s->session->ext.max_early_data > 0 | |
1932 | || s->psksession->ext.max_early_data == 0) | |
1933 | memcpy(s->early_secret, s->psksession->early_secret, EVP_MAX_MD_SIZE); | |
1934 | ||
9368f865 MC |
1935 | SSL_SESSION_free(s->session); |
1936 | s->session = s->psksession; | |
1937 | s->psksession = NULL; | |
4ff65f77 MC |
1938 | s->hit = 1; |
1939 | #endif | |
1940 | ||
1941 | return 1; | |
1942 | } |