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6dd083fd | 1 | /* |
6738bf14 | 2 | * Copyright 2016-2018 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> |
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) | |
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)) { |
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 | { | |
589b6227 | 118 | int i, end, ret = 0; |
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 | ||
589b6227 | 126 | cipher_stack = SSL_get1_supported_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 | 134 | || (alg_a & SSL_aECDSA) |
589b6227 MC |
135 | || c->min_tls >= TLS1_3_VERSION) { |
136 | ret = 1; | |
137 | break; | |
138 | } | |
ab83e314 MC |
139 | } |
140 | ||
589b6227 MC |
141 | sk_SSL_CIPHER_free(cipher_stack); |
142 | return ret; | |
ab83e314 MC |
143 | } |
144 | ||
b186a592 MC |
145 | EXT_RETURN tls_construct_ctos_ec_pt_formats(SSL *s, WPACKET *pkt, |
146 | unsigned int context, X509 *x, | |
f63a17d6 | 147 | size_t chainidx) |
ab83e314 MC |
148 | { |
149 | const unsigned char *pformats; | |
150 | size_t num_formats; | |
151 | ||
152 | if (!use_ecc(s)) | |
b186a592 | 153 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
154 | |
155 | /* Add TLS extension ECPointFormats to the ClientHello message */ | |
ab83e314 MC |
156 | tls1_get_formatlist(s, &pformats, &num_formats); |
157 | ||
158 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_ec_point_formats) | |
159 | /* Sub-packet for formats extension */ | |
160 | || !WPACKET_start_sub_packet_u16(pkt) | |
161 | || !WPACKET_sub_memcpy_u8(pkt, pformats, num_formats) | |
162 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
163 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
164 | SSL_F_TLS_CONSTRUCT_CTOS_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR); | |
b186a592 | 165 | return EXT_RETURN_FAIL; |
ab83e314 MC |
166 | } |
167 | ||
b186a592 | 168 | return EXT_RETURN_SENT; |
ab83e314 MC |
169 | } |
170 | ||
b186a592 MC |
171 | EXT_RETURN tls_construct_ctos_supported_groups(SSL *s, WPACKET *pkt, |
172 | unsigned int context, X509 *x, | |
f63a17d6 | 173 | size_t chainidx) |
ab83e314 | 174 | { |
f48d826e DSH |
175 | const uint16_t *pgroups = NULL; |
176 | size_t num_groups = 0, i; | |
ab83e314 MC |
177 | |
178 | if (!use_ecc(s)) | |
b186a592 | 179 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
180 | |
181 | /* | |
182 | * Add TLS extension supported_groups to the ClientHello message | |
183 | */ | |
184 | /* TODO(TLS1.3): Add support for DHE groups */ | |
f48d826e | 185 | tls1_get_supported_groups(s, &pgroups, &num_groups); |
ab83e314 MC |
186 | |
187 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_groups) | |
188 | /* Sub-packet for supported_groups extension */ | |
189 | || !WPACKET_start_sub_packet_u16(pkt) | |
190 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
f63a17d6 MC |
191 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
192 | SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, | |
193 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 194 | return EXT_RETURN_FAIL; |
ab83e314 MC |
195 | } |
196 | /* Copy curve ID if supported */ | |
f48d826e DSH |
197 | for (i = 0; i < num_groups; i++) { |
198 | uint16_t ctmp = pgroups[i]; | |
9e84a42d DSH |
199 | |
200 | if (tls_curve_allowed(s, ctmp, SSL_SECOP_CURVE_SUPPORTED)) { | |
201 | if (!WPACKET_put_bytes_u16(pkt, ctmp)) { | |
635c8f77 MC |
202 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
203 | SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, | |
204 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 205 | return EXT_RETURN_FAIL; |
ab83e314 MC |
206 | } |
207 | } | |
208 | } | |
209 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
635c8f77 MC |
210 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
211 | SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, | |
212 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 213 | return EXT_RETURN_FAIL; |
ab83e314 MC |
214 | } |
215 | ||
b186a592 | 216 | return EXT_RETURN_SENT; |
ab83e314 MC |
217 | } |
218 | #endif | |
219 | ||
b186a592 MC |
220 | EXT_RETURN tls_construct_ctos_session_ticket(SSL *s, WPACKET *pkt, |
221 | unsigned int context, X509 *x, | |
f63a17d6 | 222 | size_t chainidx) |
ab83e314 MC |
223 | { |
224 | size_t ticklen; | |
225 | ||
226 | if (!tls_use_ticket(s)) | |
b186a592 | 227 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
228 | |
229 | if (!s->new_session && s->session != NULL | |
08191294 MC |
230 | && s->session->ext.tick != NULL |
231 | && s->session->ssl_version != TLS1_3_VERSION) { | |
aff8c126 RS |
232 | ticklen = s->session->ext.ticklen; |
233 | } else if (s->session && s->ext.session_ticket != NULL | |
234 | && s->ext.session_ticket->data != NULL) { | |
235 | ticklen = s->ext.session_ticket->length; | |
236 | s->session->ext.tick = OPENSSL_malloc(ticklen); | |
237 | if (s->session->ext.tick == NULL) { | |
f63a17d6 MC |
238 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
239 | SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET, | |
240 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 241 | return EXT_RETURN_FAIL; |
ab83e314 | 242 | } |
aff8c126 RS |
243 | memcpy(s->session->ext.tick, |
244 | s->ext.session_ticket->data, ticklen); | |
245 | s->session->ext.ticklen = ticklen; | |
ab83e314 MC |
246 | } else { |
247 | ticklen = 0; | |
248 | } | |
249 | ||
aff8c126 RS |
250 | if (ticklen == 0 && s->ext.session_ticket != NULL && |
251 | s->ext.session_ticket->data == NULL) | |
b186a592 | 252 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
253 | |
254 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket) | |
aff8c126 | 255 | || !WPACKET_sub_memcpy_u16(pkt, s->session->ext.tick, ticklen)) { |
f63a17d6 MC |
256 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
257 | SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET, ERR_R_INTERNAL_ERROR); | |
b186a592 | 258 | return EXT_RETURN_FAIL; |
ab83e314 MC |
259 | } |
260 | ||
b186a592 | 261 | return EXT_RETURN_SENT; |
ab83e314 MC |
262 | } |
263 | ||
b186a592 MC |
264 | EXT_RETURN tls_construct_ctos_sig_algs(SSL *s, WPACKET *pkt, |
265 | unsigned int context, X509 *x, | |
f63a17d6 | 266 | size_t chainidx) |
ab83e314 MC |
267 | { |
268 | size_t salglen; | |
98c792d1 | 269 | const uint16_t *salg; |
ab83e314 MC |
270 | |
271 | if (!SSL_CLIENT_USE_SIGALGS(s)) | |
b186a592 | 272 | return EXT_RETURN_NOT_SENT; |
ab83e314 | 273 | |
a9669ddc | 274 | salglen = tls12_get_psigalgs(s, 1, &salg); |
ab83e314 MC |
275 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signature_algorithms) |
276 | /* Sub-packet for sig-algs extension */ | |
277 | || !WPACKET_start_sub_packet_u16(pkt) | |
278 | /* Sub-packet for the actual list */ | |
279 | || !WPACKET_start_sub_packet_u16(pkt) | |
280 | || !tls12_copy_sigalgs(s, pkt, salg, salglen) | |
281 | || !WPACKET_close(pkt) | |
282 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
283 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_SIG_ALGS, |
284 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 285 | return EXT_RETURN_FAIL; |
ab83e314 MC |
286 | } |
287 | ||
b186a592 | 288 | return EXT_RETURN_SENT; |
ab83e314 MC |
289 | } |
290 | ||
291 | #ifndef OPENSSL_NO_OCSP | |
b186a592 MC |
292 | EXT_RETURN tls_construct_ctos_status_request(SSL *s, WPACKET *pkt, |
293 | unsigned int context, X509 *x, | |
f63a17d6 | 294 | size_t chainidx) |
ab83e314 MC |
295 | { |
296 | int i; | |
297 | ||
e96e0f8e MC |
298 | /* This extension isn't defined for client Certificates */ |
299 | if (x != NULL) | |
b186a592 | 300 | return EXT_RETURN_NOT_SENT; |
e96e0f8e | 301 | |
aff8c126 | 302 | if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) |
b186a592 | 303 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
304 | |
305 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request) | |
306 | /* Sub-packet for status request extension */ | |
307 | || !WPACKET_start_sub_packet_u16(pkt) | |
308 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_STATUSTYPE_ocsp) | |
309 | /* Sub-packet for the ids */ | |
310 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
f63a17d6 MC |
311 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
312 | SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); | |
b186a592 | 313 | return EXT_RETURN_FAIL; |
ab83e314 | 314 | } |
aff8c126 | 315 | for (i = 0; i < sk_OCSP_RESPID_num(s->ext.ocsp.ids); i++) { |
ab83e314 | 316 | unsigned char *idbytes; |
aff8c126 | 317 | OCSP_RESPID *id = sk_OCSP_RESPID_value(s->ext.ocsp.ids, i); |
1266eefd | 318 | int idlen = i2d_OCSP_RESPID(id, NULL); |
ab83e314 | 319 | |
ab83e314 MC |
320 | if (idlen <= 0 |
321 | /* Sub-packet for an individual id */ | |
322 | || !WPACKET_sub_allocate_bytes_u16(pkt, idlen, &idbytes) | |
323 | || i2d_OCSP_RESPID(id, &idbytes) != idlen) { | |
f63a17d6 MC |
324 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
325 | SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, | |
326 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 327 | return EXT_RETURN_FAIL; |
ab83e314 MC |
328 | } |
329 | } | |
330 | if (!WPACKET_close(pkt) | |
331 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
f63a17d6 MC |
332 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
333 | SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); | |
b186a592 | 334 | return EXT_RETURN_FAIL; |
ab83e314 | 335 | } |
aff8c126 | 336 | if (s->ext.ocsp.exts) { |
ab83e314 | 337 | unsigned char *extbytes; |
aff8c126 | 338 | int extlen = i2d_X509_EXTENSIONS(s->ext.ocsp.exts, NULL); |
ab83e314 MC |
339 | |
340 | if (extlen < 0) { | |
f63a17d6 MC |
341 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
342 | SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, | |
343 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 344 | return EXT_RETURN_FAIL; |
ab83e314 MC |
345 | } |
346 | if (!WPACKET_allocate_bytes(pkt, extlen, &extbytes) | |
aff8c126 | 347 | || i2d_X509_EXTENSIONS(s->ext.ocsp.exts, &extbytes) |
ab83e314 | 348 | != extlen) { |
f63a17d6 MC |
349 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
350 | SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, | |
351 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 352 | return EXT_RETURN_FAIL; |
ab83e314 MC |
353 | } |
354 | } | |
355 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
356 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
357 | SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); | |
b186a592 | 358 | return EXT_RETURN_FAIL; |
ab83e314 MC |
359 | } |
360 | ||
b186a592 | 361 | return EXT_RETURN_SENT; |
ab83e314 MC |
362 | } |
363 | #endif | |
364 | ||
365 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
b186a592 | 366 | EXT_RETURN tls_construct_ctos_npn(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 367 | X509 *x, size_t chainidx) |
ab83e314 | 368 | { |
c7f47786 | 369 | if (s->ctx->ext.npn_select_cb == NULL || !SSL_IS_FIRST_HANDSHAKE(s)) |
b186a592 | 370 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
371 | |
372 | /* | |
373 | * The client advertises an empty extension to indicate its support | |
374 | * for Next Protocol Negotiation | |
375 | */ | |
376 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_next_proto_neg) | |
377 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
f63a17d6 MC |
378 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_NPN, |
379 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 380 | return EXT_RETURN_FAIL; |
ab83e314 MC |
381 | } |
382 | ||
b186a592 | 383 | return EXT_RETURN_SENT; |
ab83e314 MC |
384 | } |
385 | #endif | |
386 | ||
b186a592 | 387 | EXT_RETURN tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 388 | X509 *x, size_t chainidx) |
ab83e314 | 389 | { |
555cbb32 | 390 | s->s3.alpn_sent = 0; |
ab83e314 | 391 | |
c7f47786 | 392 | if (s->ext.alpn == NULL || !SSL_IS_FIRST_HANDSHAKE(s)) |
b186a592 | 393 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
394 | |
395 | if (!WPACKET_put_bytes_u16(pkt, | |
396 | TLSEXT_TYPE_application_layer_protocol_negotiation) | |
397 | /* Sub-packet ALPN extension */ | |
398 | || !WPACKET_start_sub_packet_u16(pkt) | |
aff8c126 | 399 | || !WPACKET_sub_memcpy_u16(pkt, s->ext.alpn, s->ext.alpn_len) |
ab83e314 | 400 | || !WPACKET_close(pkt)) { |
f63a17d6 MC |
401 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_ALPN, |
402 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 403 | return EXT_RETURN_FAIL; |
ab83e314 | 404 | } |
555cbb32 | 405 | s->s3.alpn_sent = 1; |
ab83e314 | 406 | |
b186a592 | 407 | return EXT_RETURN_SENT; |
ab83e314 MC |
408 | } |
409 | ||
410 | ||
411 | #ifndef OPENSSL_NO_SRTP | |
b186a592 MC |
412 | EXT_RETURN tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt, |
413 | unsigned int context, X509 *x, | |
f63a17d6 | 414 | size_t chainidx) |
ab83e314 MC |
415 | { |
416 | STACK_OF(SRTP_PROTECTION_PROFILE) *clnt = SSL_get_srtp_profiles(s); | |
1266eefd | 417 | int i, end; |
ab83e314 MC |
418 | |
419 | if (clnt == NULL) | |
b186a592 | 420 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
421 | |
422 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp) | |
423 | /* Sub-packet for SRTP extension */ | |
424 | || !WPACKET_start_sub_packet_u16(pkt) | |
425 | /* Sub-packet for the protection profile list */ | |
426 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
f63a17d6 MC |
427 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, |
428 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 429 | return EXT_RETURN_FAIL; |
ab83e314 | 430 | } |
1266eefd MC |
431 | |
432 | end = sk_SRTP_PROTECTION_PROFILE_num(clnt); | |
433 | for (i = 0; i < end; i++) { | |
434 | const SRTP_PROTECTION_PROFILE *prof = | |
435 | sk_SRTP_PROTECTION_PROFILE_value(clnt, i); | |
436 | ||
ab83e314 | 437 | if (prof == NULL || !WPACKET_put_bytes_u16(pkt, prof->id)) { |
f63a17d6 MC |
438 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
439 | SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR); | |
b186a592 | 440 | return EXT_RETURN_FAIL; |
ab83e314 MC |
441 | } |
442 | } | |
443 | if (!WPACKET_close(pkt) | |
444 | /* Add an empty use_mki value */ | |
445 | || !WPACKET_put_bytes_u8(pkt, 0) | |
446 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
447 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, |
448 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 449 | return EXT_RETURN_FAIL; |
ab83e314 MC |
450 | } |
451 | ||
b186a592 | 452 | return EXT_RETURN_SENT; |
ab83e314 MC |
453 | } |
454 | #endif | |
455 | ||
b186a592 | 456 | EXT_RETURN tls_construct_ctos_etm(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 457 | X509 *x, size_t chainidx) |
ab83e314 MC |
458 | { |
459 | if (s->options & SSL_OP_NO_ENCRYPT_THEN_MAC) | |
b186a592 | 460 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
461 | |
462 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac) | |
463 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
f63a17d6 MC |
464 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_ETM, |
465 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 466 | return EXT_RETURN_FAIL; |
ab83e314 MC |
467 | } |
468 | ||
b186a592 | 469 | return EXT_RETURN_SENT; |
ab83e314 MC |
470 | } |
471 | ||
472 | #ifndef OPENSSL_NO_CT | |
b186a592 | 473 | EXT_RETURN tls_construct_ctos_sct(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 474 | X509 *x, size_t chainidx) |
ab83e314 MC |
475 | { |
476 | if (s->ct_validation_callback == NULL) | |
b186a592 | 477 | return EXT_RETURN_NOT_SENT; |
ab83e314 | 478 | |
e96e0f8e MC |
479 | /* Not defined for client Certificates */ |
480 | if (x != NULL) | |
b186a592 | 481 | return EXT_RETURN_NOT_SENT; |
e96e0f8e | 482 | |
ab83e314 MC |
483 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signed_certificate_timestamp) |
484 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
f63a17d6 MC |
485 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_SCT, |
486 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 487 | return EXT_RETURN_FAIL; |
ab83e314 MC |
488 | } |
489 | ||
b186a592 | 490 | return EXT_RETURN_SENT; |
ab83e314 MC |
491 | } |
492 | #endif | |
493 | ||
b186a592 | 494 | EXT_RETURN tls_construct_ctos_ems(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 495 | X509 *x, size_t chainidx) |
ab83e314 | 496 | { |
088dfa13 TS |
497 | if (s->options & SSL_OP_NO_EXTENDED_MASTER_SECRET) |
498 | return EXT_RETURN_NOT_SENT; | |
499 | ||
ab83e314 MC |
500 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret) |
501 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
f63a17d6 MC |
502 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_EMS, |
503 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 504 | return EXT_RETURN_FAIL; |
ab83e314 MC |
505 | } |
506 | ||
b186a592 | 507 | return EXT_RETURN_SENT; |
ab83e314 MC |
508 | } |
509 | ||
b186a592 MC |
510 | EXT_RETURN tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt, |
511 | unsigned int context, X509 *x, | |
f63a17d6 | 512 | size_t chainidx) |
ab83e314 MC |
513 | { |
514 | int currv, min_version, max_version, reason; | |
515 | ||
b5b993b2 | 516 | reason = ssl_get_min_max_version(s, &min_version, &max_version, NULL); |
88050dd1 MC |
517 | if (reason != 0) { |
518 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
519 | SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, reason); | |
520 | return EXT_RETURN_FAIL; | |
521 | } | |
522 | ||
523 | /* | |
524 | * Don't include this if we can't negotiate TLSv1.3. We can do a straight | |
525 | * comparison here because we will never be called in DTLS. | |
526 | */ | |
527 | if (max_version < TLS1_3_VERSION) | |
528 | return EXT_RETURN_NOT_SENT; | |
529 | ||
ab83e314 MC |
530 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_versions) |
531 | || !WPACKET_start_sub_packet_u16(pkt) | |
532 | || !WPACKET_start_sub_packet_u8(pkt)) { | |
f63a17d6 MC |
533 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
534 | SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, | |
535 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 536 | return EXT_RETURN_FAIL; |
ab83e314 MC |
537 | } |
538 | ||
ab83e314 | 539 | for (currv = max_version; currv >= min_version; currv--) { |
35e742ec | 540 | if (!WPACKET_put_bytes_u16(pkt, currv)) { |
f63a17d6 MC |
541 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
542 | SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, | |
543 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 544 | return EXT_RETURN_FAIL; |
ab83e314 MC |
545 | } |
546 | } | |
547 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
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 | ||
b186a592 | 554 | return EXT_RETURN_SENT; |
ab83e314 MC |
555 | } |
556 | ||
b2f7e8c0 | 557 | /* |
e3c0d76b | 558 | * Construct a psk_kex_modes extension. |
b2f7e8c0 | 559 | */ |
b186a592 MC |
560 | EXT_RETURN tls_construct_ctos_psk_kex_modes(SSL *s, WPACKET *pkt, |
561 | unsigned int context, X509 *x, | |
f63a17d6 | 562 | size_t chainidx) |
b2f7e8c0 MC |
563 | { |
564 | #ifndef OPENSSL_NO_TLS1_3 | |
e3c0d76b MC |
565 | int nodhe = s->options & SSL_OP_ALLOW_NO_DHE_KEX; |
566 | ||
b2f7e8c0 MC |
567 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk_kex_modes) |
568 | || !WPACKET_start_sub_packet_u16(pkt) | |
569 | || !WPACKET_start_sub_packet_u8(pkt) | |
570 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE_DHE) | |
e3c0d76b | 571 | || (nodhe && !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE)) |
b2f7e8c0 MC |
572 | || !WPACKET_close(pkt) |
573 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
574 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
575 | SSL_F_TLS_CONSTRUCT_CTOS_PSK_KEX_MODES, ERR_R_INTERNAL_ERROR); | |
b186a592 | 576 | return EXT_RETURN_FAIL; |
b2f7e8c0 | 577 | } |
b3ad72ce | 578 | |
e3c0d76b MC |
579 | s->ext.psk_kex_mode = TLSEXT_KEX_MODE_FLAG_KE_DHE; |
580 | if (nodhe) | |
581 | s->ext.psk_kex_mode |= TLSEXT_KEX_MODE_FLAG_KE; | |
b2f7e8c0 MC |
582 | #endif |
583 | ||
b186a592 | 584 | return EXT_RETURN_SENT; |
b2f7e8c0 MC |
585 | } |
586 | ||
3847d426 MC |
587 | #ifndef OPENSSL_NO_TLS1_3 |
588 | static int add_key_share(SSL *s, WPACKET *pkt, unsigned int curve_id) | |
589 | { | |
7b1ec1cf MC |
590 | unsigned char *encoded_point = NULL; |
591 | EVP_PKEY *key_share_key = NULL; | |
3847d426 MC |
592 | size_t encodedlen; |
593 | ||
555cbb32 | 594 | if (s->s3.tmp.pkey != NULL) { |
fc7129dc | 595 | if (!ossl_assert(s->hello_retry_request == SSL_HRR_PENDING)) { |
f63a17d6 MC |
596 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_ADD_KEY_SHARE, |
597 | 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. */ | |
613 | encodedlen = EVP_PKEY_get1_tls_encodedpoint(key_share_key, | |
2248dbeb | 614 | &encoded_point); |
3847d426 | 615 | if (encodedlen == 0) { |
f63a17d6 | 616 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_ADD_KEY_SHARE, 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)) { |
f63a17d6 MC |
623 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_ADD_KEY_SHARE, |
624 | ERR_R_INTERNAL_ERROR); | |
7b1ec1cf | 625 | goto err; |
3847d426 MC |
626 | } |
627 | ||
628 | /* | |
629 | * TODO(TLS1.3): When changing to send more than one key_share we're | |
630 | * going to need to be able to save more than one EVP_PKEY. For now | |
631 | * we reuse the existing tmp.pkey | |
632 | */ | |
555cbb32 TS |
633 | s->s3.tmp.pkey = key_share_key; |
634 | s->s3.group_id = curve_id; | |
2248dbeb | 635 | OPENSSL_free(encoded_point); |
3847d426 | 636 | |
d8028b20 | 637 | return 1; |
7b1ec1cf | 638 | err: |
555cbb32 | 639 | if (s->s3.tmp.pkey == NULL) |
7b1ec1cf MC |
640 | EVP_PKEY_free(key_share_key); |
641 | OPENSSL_free(encoded_point); | |
d8028b20 | 642 | return 0; |
3847d426 MC |
643 | } |
644 | #endif | |
645 | ||
b186a592 MC |
646 | EXT_RETURN tls_construct_ctos_key_share(SSL *s, WPACKET *pkt, |
647 | unsigned int context, X509 *x, | |
f63a17d6 | 648 | size_t chainidx) |
ab83e314 | 649 | { |
3cf96e88 | 650 | #ifndef OPENSSL_NO_TLS1_3 |
f48d826e DSH |
651 | size_t i, num_groups = 0; |
652 | const uint16_t *pgroups = NULL; | |
9e84a42d | 653 | uint16_t curve_id = 0; |
ab83e314 MC |
654 | |
655 | /* key_share extension */ | |
656 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
657 | /* Extension data sub-packet */ | |
658 | || !WPACKET_start_sub_packet_u16(pkt) | |
659 | /* KeyShare list sub-packet */ | |
660 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
f63a17d6 MC |
661 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, |
662 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 663 | return EXT_RETURN_FAIL; |
ab83e314 MC |
664 | } |
665 | ||
f48d826e | 666 | tls1_get_supported_groups(s, &pgroups, &num_groups); |
ab83e314 MC |
667 | |
668 | /* | |
669 | * TODO(TLS1.3): Make the number of key_shares sent configurable. For | |
670 | * now, just send one | |
671 | */ | |
555cbb32 TS |
672 | if (s->s3.group_id != 0) { |
673 | curve_id = s->s3.group_id; | |
3847d426 | 674 | } else { |
f48d826e | 675 | for (i = 0; i < num_groups; i++) { |
ab83e314 | 676 | |
f48d826e | 677 | if (!tls_curve_allowed(s, pgroups[i], SSL_SECOP_CURVE_SUPPORTED)) |
3847d426 | 678 | continue; |
ab83e314 | 679 | |
f48d826e | 680 | curve_id = pgroups[i]; |
3847d426 | 681 | break; |
ab83e314 | 682 | } |
3847d426 | 683 | } |
ab83e314 | 684 | |
3847d426 | 685 | if (curve_id == 0) { |
f63a17d6 MC |
686 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, |
687 | SSL_R_NO_SUITABLE_KEY_SHARE); | |
b186a592 | 688 | return EXT_RETURN_FAIL; |
ab83e314 MC |
689 | } |
690 | ||
f63a17d6 MC |
691 | if (!add_key_share(s, pkt, curve_id)) { |
692 | /* SSLfatal() already called */ | |
b186a592 | 693 | return EXT_RETURN_FAIL; |
f63a17d6 | 694 | } |
3847d426 | 695 | |
ab83e314 | 696 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { |
f63a17d6 MC |
697 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, |
698 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 699 | return EXT_RETURN_FAIL; |
ab83e314 | 700 | } |
b186a592 | 701 | return EXT_RETURN_SENT; |
aa2ed504 TS |
702 | #else |
703 | return EXT_RETURN_NOT_SENT; | |
704 | #endif | |
ab83e314 MC |
705 | } |
706 | ||
b186a592 | 707 | EXT_RETURN tls_construct_ctos_cookie(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 708 | X509 *x, size_t chainidx) |
cfef5027 | 709 | { |
b186a592 | 710 | EXT_RETURN ret = EXT_RETURN_FAIL; |
cfef5027 MC |
711 | |
712 | /* Should only be set if we've had an HRR */ | |
713 | if (s->ext.tls13_cookie_len == 0) | |
b186a592 | 714 | return EXT_RETURN_NOT_SENT; |
cfef5027 MC |
715 | |
716 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_cookie) | |
717 | /* Extension data sub-packet */ | |
718 | || !WPACKET_start_sub_packet_u16(pkt) | |
719 | || !WPACKET_sub_memcpy_u16(pkt, s->ext.tls13_cookie, | |
720 | s->ext.tls13_cookie_len) | |
721 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
722 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_COOKIE, |
723 | ERR_R_INTERNAL_ERROR); | |
cfef5027 MC |
724 | goto end; |
725 | } | |
726 | ||
b186a592 | 727 | ret = EXT_RETURN_SENT; |
cfef5027 MC |
728 | end: |
729 | OPENSSL_free(s->ext.tls13_cookie); | |
febb0afa | 730 | s->ext.tls13_cookie = NULL; |
cfef5027 MC |
731 | s->ext.tls13_cookie_len = 0; |
732 | ||
733 | return ret; | |
734 | } | |
735 | ||
b186a592 MC |
736 | EXT_RETURN tls_construct_ctos_early_data(SSL *s, WPACKET *pkt, |
737 | unsigned int context, X509 *x, | |
f63a17d6 | 738 | size_t chainidx) |
38df5a45 | 739 | { |
696de86f PW |
740 | #ifndef OPENSSL_NO_PSK |
741 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
742 | #endif /* OPENSSL_NO_PSK */ | |
ccb76685 | 743 | const unsigned char *id = NULL; |
fff202e5 | 744 | size_t idlen = 0; |
add8d0e9 | 745 | SSL_SESSION *psksess = NULL; |
ffc5bbaa | 746 | SSL_SESSION *edsess = NULL; |
add8d0e9 MC |
747 | const EVP_MD *handmd = NULL; |
748 | ||
fc7129dc | 749 | if (s->hello_retry_request == SSL_HRR_PENDING) |
add8d0e9 MC |
750 | handmd = ssl_handshake_md(s); |
751 | ||
752 | if (s->psk_use_session_cb != NULL | |
ffc5bbaa MC |
753 | && (!s->psk_use_session_cb(s, handmd, &id, &idlen, &psksess) |
754 | || (psksess != NULL | |
755 | && psksess->ssl_version != TLS1_3_VERSION))) { | |
756 | SSL_SESSION_free(psksess); | |
f63a17d6 MC |
757 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, |
758 | SSL_R_BAD_PSK); | |
add8d0e9 MC |
759 | return EXT_RETURN_FAIL; |
760 | } | |
761 | ||
c2b290c3 | 762 | #ifndef OPENSSL_NO_PSK |
f3d40db1 MC |
763 | if (psksess == NULL && s->psk_client_callback != NULL) { |
764 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
765 | size_t psklen = 0; | |
766 | ||
767 | memset(identity, 0, sizeof(identity)); | |
768 | psklen = s->psk_client_callback(s, NULL, identity, sizeof(identity) - 1, | |
769 | psk, sizeof(psk)); | |
770 | ||
771 | if (psklen > PSK_MAX_PSK_LEN) { | |
772 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, | |
773 | SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, ERR_R_INTERNAL_ERROR); | |
774 | return EXT_RETURN_FAIL; | |
775 | } else if (psklen > 0) { | |
776 | const unsigned char tls13_aes128gcmsha256_id[] = { 0x13, 0x01 }; | |
777 | const SSL_CIPHER *cipher; | |
778 | ||
779 | idlen = strlen(identity); | |
780 | if (idlen > PSK_MAX_IDENTITY_LEN) { | |
781 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
782 | SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, | |
783 | ERR_R_INTERNAL_ERROR); | |
784 | return EXT_RETURN_FAIL; | |
785 | } | |
786 | id = (unsigned char *)identity; | |
787 | ||
788 | /* | |
789 | * We found a PSK using an old style callback. We don't know | |
790 | * the digest so we default to SHA256 as per the TLSv1.3 spec | |
791 | */ | |
792 | cipher = SSL_CIPHER_find(s, tls13_aes128gcmsha256_id); | |
793 | if (cipher == NULL) { | |
794 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
795 | SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, | |
796 | ERR_R_INTERNAL_ERROR); | |
797 | return EXT_RETURN_FAIL; | |
798 | } | |
799 | ||
800 | psksess = SSL_SESSION_new(); | |
801 | if (psksess == NULL | |
802 | || !SSL_SESSION_set1_master_key(psksess, psk, psklen) | |
803 | || !SSL_SESSION_set_cipher(psksess, cipher) | |
804 | || !SSL_SESSION_set_protocol_version(psksess, TLS1_3_VERSION)) { | |
805 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
806 | SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, | |
807 | ERR_R_INTERNAL_ERROR); | |
808 | OPENSSL_cleanse(psk, psklen); | |
809 | return EXT_RETURN_FAIL; | |
810 | } | |
811 | OPENSSL_cleanse(psk, psklen); | |
812 | } | |
813 | } | |
c2b290c3 | 814 | #endif /* OPENSSL_NO_PSK */ |
f3d40db1 | 815 | |
add8d0e9 MC |
816 | SSL_SESSION_free(s->psksession); |
817 | s->psksession = psksess; | |
818 | if (psksess != NULL) { | |
819 | OPENSSL_free(s->psksession_id); | |
820 | s->psksession_id = OPENSSL_memdup(id, idlen); | |
821 | if (s->psksession_id == NULL) { | |
f63a17d6 MC |
822 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
823 | SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, ERR_R_INTERNAL_ERROR); | |
add8d0e9 MC |
824 | return EXT_RETURN_FAIL; |
825 | } | |
826 | s->psksession_id_len = idlen; | |
827 | } | |
828 | ||
38df5a45 | 829 | if (s->early_data_state != SSL_EARLY_DATA_CONNECTING |
add8d0e9 MC |
830 | || (s->session->ext.max_early_data == 0 |
831 | && (psksess == NULL || psksess->ext.max_early_data == 0))) { | |
38df5a45 | 832 | s->max_early_data = 0; |
b186a592 | 833 | return EXT_RETURN_NOT_SENT; |
38df5a45 | 834 | } |
ffc5bbaa MC |
835 | edsess = s->session->ext.max_early_data != 0 ? s->session : psksess; |
836 | s->max_early_data = edsess->ext.max_early_data; | |
837 | ||
bfab12bb MC |
838 | if (edsess->ext.hostname != NULL) { |
839 | if (s->ext.hostname == NULL | |
840 | || (s->ext.hostname != NULL | |
841 | && strcmp(s->ext.hostname, edsess->ext.hostname) != 0)) { | |
f63a17d6 MC |
842 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
843 | SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, | |
844 | SSL_R_INCONSISTENT_EARLY_DATA_SNI); | |
bfab12bb MC |
845 | return EXT_RETURN_FAIL; |
846 | } | |
ffc5bbaa MC |
847 | } |
848 | ||
849 | if ((s->ext.alpn == NULL && edsess->ext.alpn_selected != NULL)) { | |
f63a17d6 MC |
850 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, |
851 | SSL_R_INCONSISTENT_EARLY_DATA_ALPN); | |
ffc5bbaa MC |
852 | return EXT_RETURN_FAIL; |
853 | } | |
854 | ||
855 | /* | |
856 | * Verify that we are offering an ALPN protocol consistent with the early | |
857 | * data. | |
858 | */ | |
859 | if (edsess->ext.alpn_selected != NULL) { | |
860 | PACKET prots, alpnpkt; | |
861 | int found = 0; | |
862 | ||
863 | if (!PACKET_buf_init(&prots, s->ext.alpn, s->ext.alpn_len)) { | |
f63a17d6 MC |
864 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
865 | SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, ERR_R_INTERNAL_ERROR); | |
ffc5bbaa MC |
866 | return EXT_RETURN_FAIL; |
867 | } | |
868 | while (PACKET_get_length_prefixed_1(&prots, &alpnpkt)) { | |
869 | if (PACKET_equal(&alpnpkt, edsess->ext.alpn_selected, | |
870 | edsess->ext.alpn_selected_len)) { | |
871 | found = 1; | |
872 | break; | |
873 | } | |
874 | } | |
875 | if (!found) { | |
f63a17d6 MC |
876 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
877 | SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, | |
878 | SSL_R_INCONSISTENT_EARLY_DATA_ALPN); | |
ffc5bbaa MC |
879 | return EXT_RETURN_FAIL; |
880 | } | |
881 | } | |
38df5a45 MC |
882 | |
883 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) | |
884 | || !WPACKET_start_sub_packet_u16(pkt) | |
885 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
886 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, |
887 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 888 | return EXT_RETURN_FAIL; |
38df5a45 MC |
889 | } |
890 | ||
891 | /* | |
892 | * We set this to rejected here. Later, if the server acknowledges the | |
893 | * extension, we set it to accepted. | |
894 | */ | |
895 | s->ext.early_data = SSL_EARLY_DATA_REJECTED; | |
4be3a7c7 | 896 | s->ext.early_data_ok = 1; |
38df5a45 | 897 | |
b186a592 | 898 | return EXT_RETURN_SENT; |
38df5a45 MC |
899 | } |
900 | ||
1266eefd MC |
901 | #define F5_WORKAROUND_MIN_MSG_LEN 0xff |
902 | #define F5_WORKAROUND_MAX_MSG_LEN 0x200 | |
903 | ||
d702ad12 MC |
904 | /* |
905 | * PSK pre binder overhead = | |
906 | * 2 bytes for TLSEXT_TYPE_psk | |
907 | * 2 bytes for extension length | |
908 | * 2 bytes for identities list length | |
909 | * 2 bytes for identity length | |
910 | * 4 bytes for obfuscated_ticket_age | |
911 | * 2 bytes for binder list length | |
912 | * 1 byte for binder length | |
913 | * The above excludes the number of bytes for the identity itself and the | |
914 | * subsequent binder bytes | |
915 | */ | |
916 | #define PSK_PRE_BINDER_OVERHEAD (2 + 2 + 2 + 2 + 4 + 2 + 1) | |
917 | ||
b186a592 MC |
918 | EXT_RETURN tls_construct_ctos_padding(SSL *s, WPACKET *pkt, |
919 | unsigned int context, X509 *x, | |
f63a17d6 | 920 | size_t chainidx) |
ab83e314 MC |
921 | { |
922 | unsigned char *padbytes; | |
923 | size_t hlen; | |
924 | ||
925 | if ((s->options & SSL_OP_TLSEXT_PADDING) == 0) | |
b186a592 | 926 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
927 | |
928 | /* | |
d702ad12 MC |
929 | * Add padding to workaround bugs in F5 terminators. See RFC7685. |
930 | * This code calculates the length of all extensions added so far but | |
931 | * excludes the PSK extension (because that MUST be written last). Therefore | |
932 | * this extension MUST always appear second to last. | |
ab83e314 MC |
933 | */ |
934 | if (!WPACKET_get_total_written(pkt, &hlen)) { | |
f63a17d6 MC |
935 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PADDING, |
936 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 937 | return EXT_RETURN_FAIL; |
ab83e314 MC |
938 | } |
939 | ||
d702ad12 MC |
940 | /* |
941 | * If we're going to send a PSK then that will be written out after this | |
942 | * extension, so we need to calculate how long it is going to be. | |
943 | */ | |
944 | if (s->session->ssl_version == TLS1_3_VERSION | |
945 | && s->session->ext.ticklen != 0 | |
946 | && s->session->cipher != NULL) { | |
947 | const EVP_MD *md = ssl_md(s->session->cipher->algorithm2); | |
948 | ||
949 | if (md != NULL) { | |
950 | /* | |
951 | * Add the fixed PSK overhead, the identity length and the binder | |
952 | * length. | |
953 | */ | |
954 | hlen += PSK_PRE_BINDER_OVERHEAD + s->session->ext.ticklen | |
955 | + EVP_MD_size(md); | |
956 | } | |
957 | } | |
958 | ||
1266eefd | 959 | if (hlen > F5_WORKAROUND_MIN_MSG_LEN && hlen < F5_WORKAROUND_MAX_MSG_LEN) { |
1ee4b98e | 960 | /* Calculate the amount of padding we need to add */ |
1266eefd MC |
961 | hlen = F5_WORKAROUND_MAX_MSG_LEN - hlen; |
962 | ||
963 | /* | |
964 | * Take off the size of extension header itself (2 bytes for type and | |
10ed1b72 TS |
965 | * 2 bytes for length bytes), but ensure that the extension is at least |
966 | * 1 byte long so as not to have an empty extension last (WebSphere 7.x, | |
967 | * 8.x are intolerant of that condition) | |
1266eefd | 968 | */ |
3d85c7f4 | 969 | if (hlen > 4) |
ab83e314 MC |
970 | hlen -= 4; |
971 | else | |
10ed1b72 | 972 | hlen = 1; |
ab83e314 MC |
973 | |
974 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_padding) | |
975 | || !WPACKET_sub_allocate_bytes_u16(pkt, hlen, &padbytes)) { | |
f63a17d6 MC |
976 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PADDING, |
977 | ERR_R_INTERNAL_ERROR); | |
eb5fd03b | 978 | return EXT_RETURN_FAIL; |
ab83e314 MC |
979 | } |
980 | memset(padbytes, 0, hlen); | |
981 | } | |
982 | ||
b186a592 | 983 | return EXT_RETURN_SENT; |
ab83e314 MC |
984 | } |
985 | ||
ec15acb6 MC |
986 | /* |
987 | * Construct the pre_shared_key extension | |
988 | */ | |
b186a592 | 989 | EXT_RETURN tls_construct_ctos_psk(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 990 | X509 *x, size_t chainidx) |
ec15acb6 MC |
991 | { |
992 | #ifndef OPENSSL_NO_TLS1_3 | |
15b1688a | 993 | uint32_t now, agesec, agems = 0; |
add8d0e9 | 994 | size_t reshashsize = 0, pskhashsize = 0, binderoffset, msglen; |
9368f865 | 995 | unsigned char *resbinder = NULL, *pskbinder = NULL, *msgstart = NULL; |
15b1688a | 996 | const EVP_MD *handmd = NULL, *mdres = NULL, *mdpsk = NULL; |
9368f865 | 997 | int dores = 0; |
ec15acb6 | 998 | |
c96ce52c | 999 | s->ext.tick_identity = 0; |
ec15acb6 | 1000 | |
d702ad12 MC |
1001 | /* |
1002 | * Note: At this stage of the code we only support adding a single | |
1003 | * resumption PSK. If we add support for multiple PSKs then the length | |
1004 | * calculations in the padding extension will need to be adjusted. | |
1005 | */ | |
1006 | ||
ec15acb6 | 1007 | /* |
08191294 MC |
1008 | * If this is an incompatible or new session then we have nothing to resume |
1009 | * so don't add this extension. | |
ec15acb6 | 1010 | */ |
08191294 | 1011 | if (s->session->ssl_version != TLS1_3_VERSION |
add8d0e9 | 1012 | || (s->session->ext.ticklen == 0 && s->psksession == NULL)) |
b186a592 | 1013 | return EXT_RETURN_NOT_SENT; |
ec15acb6 | 1014 | |
fc7129dc | 1015 | if (s->hello_retry_request == SSL_HRR_PENDING) |
9368f865 MC |
1016 | handmd = ssl_handshake_md(s); |
1017 | ||
9368f865 | 1018 | if (s->session->ext.ticklen != 0) { |
72257204 | 1019 | /* Get the digest associated with the ciphersuite in the session */ |
9368f865 | 1020 | if (s->session->cipher == NULL) { |
f63a17d6 MC |
1021 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK, |
1022 | ERR_R_INTERNAL_ERROR); | |
635c8f77 | 1023 | return EXT_RETURN_FAIL; |
9368f865 | 1024 | } |
9368f865 MC |
1025 | mdres = ssl_md(s->session->cipher->algorithm2); |
1026 | if (mdres == NULL) { | |
72257204 MC |
1027 | /* |
1028 | * Don't recognize this cipher so we can't use the session. | |
1029 | * Ignore it | |
1030 | */ | |
9368f865 MC |
1031 | goto dopsksess; |
1032 | } | |
1033 | ||
fc7129dc | 1034 | if (s->hello_retry_request == SSL_HRR_PENDING && mdres != handmd) { |
9368f865 | 1035 | /* |
72257204 MC |
1036 | * Selected ciphersuite hash does not match the hash for the session |
1037 | * so we can't use it. | |
9368f865 MC |
1038 | */ |
1039 | goto dopsksess; | |
1040 | } | |
1f5b44e9 | 1041 | |
cf3e221b | 1042 | /* |
9368f865 | 1043 | * Technically the C standard just says time() returns a time_t and says |
72257204 MC |
1044 | * nothing about the encoding of that type. In practice most |
1045 | * implementations follow POSIX which holds it as an integral type in | |
1046 | * seconds since epoch. We've already made the assumption that we can do | |
1047 | * this in multiple places in the code, so portability shouldn't be an | |
1048 | * issue. | |
cf3e221b | 1049 | */ |
9368f865 MC |
1050 | now = (uint32_t)time(NULL); |
1051 | agesec = now - (uint32_t)s->session->time; | |
7e70213f MC |
1052 | /* |
1053 | * We calculate the age in seconds but the server may work in ms. Due to | |
1054 | * rounding errors we could overestimate the age by up to 1s. It is | |
1055 | * better to underestimate it. Otherwise, if the RTT is very short, when | |
1056 | * the server calculates the age reported by the client it could be | |
1057 | * bigger than the age calculated on the server - which should never | |
1058 | * happen. | |
1059 | */ | |
1060 | if (agesec > 0) | |
1061 | agesec--; | |
cf3e221b | 1062 | |
9368f865 MC |
1063 | if (s->session->ext.tick_lifetime_hint < agesec) { |
1064 | /* Ticket is too old. Ignore it. */ | |
1065 | goto dopsksess; | |
1066 | } | |
ec15acb6 | 1067 | |
9368f865 MC |
1068 | /* |
1069 | * Calculate age in ms. We're just doing it to nearest second. Should be | |
1070 | * good enough. | |
1071 | */ | |
1072 | agems = agesec * (uint32_t)1000; | |
fc24f0bf | 1073 | |
9368f865 MC |
1074 | if (agesec != 0 && agems / (uint32_t)1000 != agesec) { |
1075 | /* | |
72257204 MC |
1076 | * Overflow. Shouldn't happen unless this is a *really* old session. |
1077 | * If so we just ignore it. | |
9368f865 MC |
1078 | */ |
1079 | goto dopsksess; | |
1080 | } | |
ec15acb6 | 1081 | |
ec15acb6 | 1082 | /* |
72257204 MC |
1083 | * Obfuscate the age. Overflow here is fine, this addition is supposed |
1084 | * to be mod 2^32. | |
ec15acb6 | 1085 | */ |
9368f865 MC |
1086 | agems += s->session->ext.tick_age_add; |
1087 | ||
1088 | reshashsize = EVP_MD_size(mdres); | |
c96ce52c | 1089 | s->ext.tick_identity++; |
9368f865 | 1090 | dores = 1; |
ec15acb6 MC |
1091 | } |
1092 | ||
9368f865 | 1093 | dopsksess: |
add8d0e9 | 1094 | if (!dores && s->psksession == NULL) |
9368f865 | 1095 | return EXT_RETURN_NOT_SENT; |
ec15acb6 | 1096 | |
add8d0e9 MC |
1097 | if (s->psksession != NULL) { |
1098 | mdpsk = ssl_md(s->psksession->cipher->algorithm2); | |
9368f865 MC |
1099 | if (mdpsk == NULL) { |
1100 | /* | |
1101 | * Don't recognize this cipher so we can't use the session. | |
1102 | * If this happens it's an application bug. | |
1103 | */ | |
f63a17d6 MC |
1104 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK, |
1105 | SSL_R_BAD_PSK); | |
635c8f77 | 1106 | return EXT_RETURN_FAIL; |
9368f865 MC |
1107 | } |
1108 | ||
fc7129dc | 1109 | if (s->hello_retry_request == SSL_HRR_PENDING && mdpsk != handmd) { |
9368f865 MC |
1110 | /* |
1111 | * Selected ciphersuite hash does not match the hash for the PSK | |
1112 | * session. This is an application bug. | |
1113 | */ | |
f63a17d6 MC |
1114 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK, |
1115 | SSL_R_BAD_PSK); | |
635c8f77 | 1116 | return EXT_RETURN_FAIL; |
9368f865 MC |
1117 | } |
1118 | ||
1119 | pskhashsize = EVP_MD_size(mdpsk); | |
1120 | } | |
ec15acb6 MC |
1121 | |
1122 | /* Create the extension, but skip over the binder for now */ | |
1123 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk) | |
1124 | || !WPACKET_start_sub_packet_u16(pkt) | |
9368f865 | 1125 | || !WPACKET_start_sub_packet_u16(pkt)) { |
f63a17d6 MC |
1126 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK, |
1127 | ERR_R_INTERNAL_ERROR); | |
635c8f77 | 1128 | return EXT_RETURN_FAIL; |
9368f865 MC |
1129 | } |
1130 | ||
1131 | if (dores) { | |
1132 | if (!WPACKET_sub_memcpy_u16(pkt, s->session->ext.tick, | |
1133 | s->session->ext.ticklen) | |
1134 | || !WPACKET_put_bytes_u32(pkt, agems)) { | |
f63a17d6 MC |
1135 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK, |
1136 | ERR_R_INTERNAL_ERROR); | |
635c8f77 | 1137 | return EXT_RETURN_FAIL; |
9368f865 MC |
1138 | } |
1139 | } | |
1140 | ||
add8d0e9 MC |
1141 | if (s->psksession != NULL) { |
1142 | if (!WPACKET_sub_memcpy_u16(pkt, s->psksession_id, | |
1143 | s->psksession_id_len) | |
9368f865 | 1144 | || !WPACKET_put_bytes_u32(pkt, 0)) { |
f63a17d6 MC |
1145 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK, |
1146 | ERR_R_INTERNAL_ERROR); | |
635c8f77 | 1147 | return EXT_RETURN_FAIL; |
9368f865 | 1148 | } |
c96ce52c | 1149 | s->ext.tick_identity++; |
9368f865 MC |
1150 | } |
1151 | ||
1152 | if (!WPACKET_close(pkt) | |
ec15acb6 MC |
1153 | || !WPACKET_get_total_written(pkt, &binderoffset) |
1154 | || !WPACKET_start_sub_packet_u16(pkt) | |
9368f865 MC |
1155 | || (dores |
1156 | && !WPACKET_sub_allocate_bytes_u8(pkt, reshashsize, &resbinder)) | |
add8d0e9 | 1157 | || (s->psksession != NULL |
9368f865 | 1158 | && !WPACKET_sub_allocate_bytes_u8(pkt, pskhashsize, &pskbinder)) |
ec15acb6 MC |
1159 | || !WPACKET_close(pkt) |
1160 | || !WPACKET_close(pkt) | |
1161 | || !WPACKET_get_total_written(pkt, &msglen) | |
1162 | /* | |
1163 | * We need to fill in all the sub-packet lengths now so we can | |
1164 | * calculate the HMAC of the message up to the binders | |
1165 | */ | |
1166 | || !WPACKET_fill_lengths(pkt)) { | |
f63a17d6 MC |
1167 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK, |
1168 | ERR_R_INTERNAL_ERROR); | |
635c8f77 | 1169 | return EXT_RETURN_FAIL; |
ec15acb6 MC |
1170 | } |
1171 | ||
1172 | msgstart = WPACKET_get_curr(pkt) - msglen; | |
1173 | ||
72257204 MC |
1174 | if (dores |
1175 | && tls_psk_do_binder(s, mdres, msgstart, binderoffset, NULL, | |
1176 | resbinder, s->session, 1, 0) != 1) { | |
635c8f77 MC |
1177 | /* SSLfatal() already called */ |
1178 | return EXT_RETURN_FAIL; | |
ec15acb6 MC |
1179 | } |
1180 | ||
add8d0e9 | 1181 | if (s->psksession != NULL |
72257204 | 1182 | && tls_psk_do_binder(s, mdpsk, msgstart, binderoffset, NULL, |
add8d0e9 | 1183 | pskbinder, s->psksession, 1, 1) != 1) { |
635c8f77 MC |
1184 | /* SSLfatal() already called */ |
1185 | return EXT_RETURN_FAIL; | |
9368f865 MC |
1186 | } |
1187 | ||
635c8f77 | 1188 | return EXT_RETURN_SENT; |
ec15acb6 | 1189 | #else |
89bc9cf6 | 1190 | return EXT_RETURN_NOT_SENT; |
ec15acb6 MC |
1191 | #endif |
1192 | } | |
1193 | ||
9d75dce3 TS |
1194 | EXT_RETURN tls_construct_ctos_post_handshake_auth(SSL *s, WPACKET *pkt, |
1195 | unsigned int context, | |
1196 | X509 *x, size_t chainidx) | |
1197 | { | |
1198 | #ifndef OPENSSL_NO_TLS1_3 | |
32097b33 MC |
1199 | if (!s->pha_enabled) |
1200 | return EXT_RETURN_NOT_SENT; | |
9d75dce3 TS |
1201 | |
1202 | /* construct extension - 0 length, no contents */ | |
1203 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_post_handshake_auth) | |
1204 | || !WPACKET_start_sub_packet_u16(pkt) | |
1205 | || !WPACKET_close(pkt)) { | |
1206 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
1207 | SSL_F_TLS_CONSTRUCT_CTOS_POST_HANDSHAKE_AUTH, | |
1208 | ERR_R_INTERNAL_ERROR); | |
1209 | return EXT_RETURN_FAIL; | |
1210 | } | |
1211 | ||
1212 | s->post_handshake_auth = SSL_PHA_EXT_SENT; | |
1213 | ||
1214 | return EXT_RETURN_SENT; | |
1215 | #else | |
1216 | return EXT_RETURN_NOT_SENT; | |
1217 | #endif | |
1218 | } | |
1219 | ||
1220 | ||
6dd083fd MC |
1221 | /* |
1222 | * Parse the server's renegotiation binding and abort if it's not right | |
1223 | */ | |
61138358 | 1224 | int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 1225 | X509 *x, size_t chainidx) |
6dd083fd | 1226 | { |
555cbb32 TS |
1227 | size_t expected_len = s->s3.previous_client_finished_len |
1228 | + s->s3.previous_server_finished_len; | |
6dd083fd MC |
1229 | size_t ilen; |
1230 | const unsigned char *data; | |
1231 | ||
1232 | /* Check for logic errors */ | |
b77f3ed1 | 1233 | if (!ossl_assert(expected_len == 0 |
555cbb32 | 1234 | || s->s3.previous_client_finished_len != 0) |
b77f3ed1 | 1235 | || !ossl_assert(expected_len == 0 |
555cbb32 | 1236 | || s->s3.previous_server_finished_len != 0)) { |
f63a17d6 MC |
1237 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
1238 | ERR_R_INTERNAL_ERROR); | |
b77f3ed1 MC |
1239 | return 0; |
1240 | } | |
6dd083fd MC |
1241 | |
1242 | /* Parse the length byte */ | |
1243 | if (!PACKET_get_1_len(pkt, &ilen)) { | |
f63a17d6 MC |
1244 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
1245 | SSL_R_RENEGOTIATION_ENCODING_ERR); | |
6dd083fd MC |
1246 | return 0; |
1247 | } | |
1248 | ||
1249 | /* Consistency check */ | |
1250 | if (PACKET_remaining(pkt) != ilen) { | |
f63a17d6 MC |
1251 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
1252 | SSL_R_RENEGOTIATION_ENCODING_ERR); | |
6dd083fd MC |
1253 | return 0; |
1254 | } | |
1255 | ||
1256 | /* Check that the extension matches */ | |
1257 | if (ilen != expected_len) { | |
f63a17d6 MC |
1258 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
1259 | SSL_R_RENEGOTIATION_MISMATCH); | |
6dd083fd MC |
1260 | return 0; |
1261 | } | |
1262 | ||
555cbb32 TS |
1263 | if (!PACKET_get_bytes(pkt, &data, s->s3.previous_client_finished_len) |
1264 | || memcmp(data, s->s3.previous_client_finished, | |
1265 | s->s3.previous_client_finished_len) != 0) { | |
f63a17d6 MC |
1266 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
1267 | SSL_R_RENEGOTIATION_MISMATCH); | |
6dd083fd MC |
1268 | return 0; |
1269 | } | |
1270 | ||
555cbb32 TS |
1271 | if (!PACKET_get_bytes(pkt, &data, s->s3.previous_server_finished_len) |
1272 | || memcmp(data, s->s3.previous_server_finished, | |
1273 | s->s3.previous_server_finished_len) != 0) { | |
f63a17d6 MC |
1274 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
1275 | SSL_R_RENEGOTIATION_MISMATCH); | |
6dd083fd MC |
1276 | return 0; |
1277 | } | |
555cbb32 | 1278 | s->s3.send_connection_binding = 1; |
6dd083fd MC |
1279 | |
1280 | return 1; | |
1281 | } | |
1282 | ||
cf72c757 F |
1283 | /* Parse the server's max fragment len extension packet */ |
1284 | int tls_parse_stoc_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context, | |
f63a17d6 | 1285 | X509 *x, size_t chainidx) |
cf72c757 F |
1286 | { |
1287 | unsigned int value; | |
1288 | ||
1289 | if (PACKET_remaining(pkt) != 1 || !PACKET_get_1(pkt, &value)) { | |
56d36288 | 1290 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_MAXFRAGMENTLEN, |
f63a17d6 | 1291 | SSL_R_BAD_EXTENSION); |
cf72c757 F |
1292 | return 0; |
1293 | } | |
1294 | ||
1295 | /* |value| should contains a valid max-fragment-length code. */ | |
1296 | if (!IS_MAX_FRAGMENT_LENGTH_EXT_VALID(value)) { | |
f63a17d6 MC |
1297 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1298 | SSL_F_TLS_PARSE_STOC_MAXFRAGMENTLEN, | |
1299 | SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); | |
cf72c757 F |
1300 | return 0; |
1301 | } | |
1302 | ||
1303 | /* Must be the same value as client-configured one who was sent to server */ | |
1304 | /*- | |
1305 | * RFC 6066: if a client receives a maximum fragment length negotiation | |
1306 | * response that differs from the length it requested, ... | |
1307 | * It must abort with SSL_AD_ILLEGAL_PARAMETER alert | |
1308 | */ | |
1309 | if (value != s->ext.max_fragment_len_mode) { | |
f63a17d6 MC |
1310 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1311 | SSL_F_TLS_PARSE_STOC_MAXFRAGMENTLEN, | |
1312 | SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); | |
cf72c757 F |
1313 | return 0; |
1314 | } | |
1315 | ||
1316 | /* | |
1317 | * Maximum Fragment Length Negotiation succeeded. | |
1318 | * The negotiated Maximum Fragment Length is binding now. | |
1319 | */ | |
1320 | s->session->ext.max_fragment_len_mode = value; | |
1321 | ||
1322 | return 1; | |
1323 | } | |
1324 | ||
61138358 | 1325 | int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 1326 | X509 *x, size_t chainidx) |
6dd083fd | 1327 | { |
fb34a0f4 | 1328 | if (s->ext.hostname == NULL) { |
f63a17d6 MC |
1329 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_SERVER_NAME, |
1330 | ERR_R_INTERNAL_ERROR); | |
fb34a0f4 MC |
1331 | return 0; |
1332 | } | |
1333 | ||
1334 | if (PACKET_remaining(pkt) > 0) { | |
f63a17d6 MC |
1335 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_SERVER_NAME, |
1336 | SSL_R_BAD_EXTENSION); | |
6dd083fd MC |
1337 | return 0; |
1338 | } | |
1339 | ||
1340 | if (!s->hit) { | |
aff8c126 | 1341 | if (s->session->ext.hostname != NULL) { |
f63a17d6 MC |
1342 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_SERVER_NAME, |
1343 | ERR_R_INTERNAL_ERROR); | |
6dd083fd MC |
1344 | return 0; |
1345 | } | |
aff8c126 RS |
1346 | s->session->ext.hostname = OPENSSL_strdup(s->ext.hostname); |
1347 | if (s->session->ext.hostname == NULL) { | |
f63a17d6 MC |
1348 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_SERVER_NAME, |
1349 | ERR_R_INTERNAL_ERROR); | |
6dd083fd MC |
1350 | return 0; |
1351 | } | |
1352 | } | |
1353 | ||
1354 | return 1; | |
1355 | } | |
1356 | ||
1357 | #ifndef OPENSSL_NO_EC | |
61138358 | 1358 | int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 1359 | X509 *x, size_t chainidx) |
6dd083fd | 1360 | { |
848a950b | 1361 | size_t ecpointformats_len; |
6dd083fd MC |
1362 | PACKET ecptformatlist; |
1363 | ||
1364 | if (!PACKET_as_length_prefixed_1(pkt, &ecptformatlist)) { | |
f63a17d6 MC |
1365 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS, |
1366 | SSL_R_BAD_EXTENSION); | |
6dd083fd MC |
1367 | return 0; |
1368 | } | |
1369 | if (!s->hit) { | |
aff8c126 | 1370 | ecpointformats_len = PACKET_remaining(&ecptformatlist); |
848a950b MC |
1371 | if (ecpointformats_len == 0) { |
1372 | SSLfatal(s, SSL_AD_DECODE_ERROR, | |
1373 | SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS, SSL_R_BAD_LENGTH); | |
1374 | return 0; | |
1375 | } | |
6dd083fd | 1376 | |
848a950b | 1377 | s->session->ext.ecpointformats_len = 0; |
aff8c126 RS |
1378 | OPENSSL_free(s->session->ext.ecpointformats); |
1379 | s->session->ext.ecpointformats = OPENSSL_malloc(ecpointformats_len); | |
1380 | if (s->session->ext.ecpointformats == NULL) { | |
f63a17d6 MC |
1381 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1382 | SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR); | |
6dd083fd MC |
1383 | return 0; |
1384 | } | |
1385 | ||
aff8c126 | 1386 | s->session->ext.ecpointformats_len = ecpointformats_len; |
6dd083fd MC |
1387 | |
1388 | if (!PACKET_copy_bytes(&ecptformatlist, | |
aff8c126 RS |
1389 | s->session->ext.ecpointformats, |
1390 | ecpointformats_len)) { | |
f63a17d6 MC |
1391 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1392 | SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR); | |
6dd083fd MC |
1393 | return 0; |
1394 | } | |
1395 | } | |
1396 | ||
1397 | return 1; | |
1398 | } | |
1399 | #endif | |
1400 | ||
61138358 | 1401 | int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 1402 | X509 *x, size_t chainidx) |
6dd083fd | 1403 | { |
aff8c126 RS |
1404 | if (s->ext.session_ticket_cb != NULL && |
1405 | !s->ext.session_ticket_cb(s, PACKET_data(pkt), | |
1406 | PACKET_remaining(pkt), | |
1407 | s->ext.session_ticket_cb_arg)) { | |
f63a17d6 MC |
1408 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
1409 | SSL_F_TLS_PARSE_STOC_SESSION_TICKET, SSL_R_BAD_EXTENSION); | |
6dd083fd MC |
1410 | return 0; |
1411 | } | |
1266eefd | 1412 | |
fb34a0f4 | 1413 | if (!tls_use_ticket(s)) { |
f63a17d6 MC |
1414 | SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION, |
1415 | SSL_F_TLS_PARSE_STOC_SESSION_TICKET, SSL_R_BAD_EXTENSION); | |
6dd083fd MC |
1416 | return 0; |
1417 | } | |
fb34a0f4 | 1418 | if (PACKET_remaining(pkt) > 0) { |
f63a17d6 MC |
1419 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
1420 | SSL_F_TLS_PARSE_STOC_SESSION_TICKET, SSL_R_BAD_EXTENSION); | |
fb34a0f4 MC |
1421 | return 0; |
1422 | } | |
1266eefd | 1423 | |
aff8c126 | 1424 | s->ext.ticket_expected = 1; |
6dd083fd MC |
1425 | |
1426 | return 1; | |
1427 | } | |
1428 | ||
ab83e314 | 1429 | #ifndef OPENSSL_NO_OCSP |
61138358 | 1430 | int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 1431 | X509 *x, size_t chainidx) |
6dd083fd | 1432 | { |
5de683d2 MC |
1433 | if (context == SSL_EXT_TLS1_3_CERTIFICATE_REQUEST) { |
1434 | /* We ignore this if the server sends a CertificateRequest */ | |
1435 | /* TODO(TLS1.3): Add support for this */ | |
1436 | return 1; | |
1437 | } | |
1438 | ||
6dd083fd | 1439 | /* |
f63e4288 MC |
1440 | * MUST only be sent if we've requested a status |
1441 | * request message. In TLS <= 1.2 it must also be empty. | |
6dd083fd | 1442 | */ |
fb34a0f4 | 1443 | if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) { |
f63a17d6 MC |
1444 | SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION, |
1445 | SSL_F_TLS_PARSE_STOC_STATUS_REQUEST, SSL_R_BAD_EXTENSION); | |
6dd083fd MC |
1446 | return 0; |
1447 | } | |
fb34a0f4 | 1448 | if (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) > 0) { |
f63a17d6 MC |
1449 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
1450 | SSL_F_TLS_PARSE_STOC_STATUS_REQUEST, SSL_R_BAD_EXTENSION); | |
fb34a0f4 MC |
1451 | return 0; |
1452 | } | |
f63e4288 MC |
1453 | |
1454 | if (SSL_IS_TLS13(s)) { | |
1455 | /* We only know how to handle this if it's for the first Certificate in | |
1ee4b98e | 1456 | * the chain. We ignore any other responses. |
f63e4288 | 1457 | */ |
8521ced6 | 1458 | if (chainidx != 0) |
f63e4288 | 1459 | return 1; |
f63a17d6 MC |
1460 | |
1461 | /* SSLfatal() already called */ | |
1462 | return tls_process_cert_status_body(s, pkt); | |
f63e4288 MC |
1463 | } |
1464 | ||
6dd083fd | 1465 | /* Set flag to expect CertificateStatus message */ |
aff8c126 | 1466 | s->ext.status_expected = 1; |
6dd083fd MC |
1467 | |
1468 | return 1; | |
1469 | } | |
ab83e314 | 1470 | #endif |
6dd083fd MC |
1471 | |
1472 | ||
1473 | #ifndef OPENSSL_NO_CT | |
61138358 | 1474 | int tls_parse_stoc_sct(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1475 | size_t chainidx) |
6dd083fd | 1476 | { |
5de683d2 MC |
1477 | if (context == SSL_EXT_TLS1_3_CERTIFICATE_REQUEST) { |
1478 | /* We ignore this if the server sends it in a CertificateRequest */ | |
1479 | /* TODO(TLS1.3): Add support for this */ | |
1480 | return 1; | |
1481 | } | |
1482 | ||
6dd083fd MC |
1483 | /* |
1484 | * Only take it if we asked for it - i.e if there is no CT validation | |
1485 | * callback set, then a custom extension MAY be processing it, so we | |
1486 | * need to let control continue to flow to that. | |
1487 | */ | |
1488 | if (s->ct_validation_callback != NULL) { | |
1489 | size_t size = PACKET_remaining(pkt); | |
1490 | ||
1491 | /* Simply copy it off for later processing */ | |
aff8c126 RS |
1492 | OPENSSL_free(s->ext.scts); |
1493 | s->ext.scts = NULL; | |
1266eefd | 1494 | |
3a63c0ed | 1495 | s->ext.scts_len = (uint16_t)size; |
6dd083fd | 1496 | if (size > 0) { |
aff8c126 RS |
1497 | s->ext.scts = OPENSSL_malloc(size); |
1498 | if (s->ext.scts == NULL | |
1499 | || !PACKET_copy_bytes(pkt, s->ext.scts, size)) { | |
f63a17d6 MC |
1500 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_SCT, |
1501 | ERR_R_INTERNAL_ERROR); | |
6dd083fd MC |
1502 | return 0; |
1503 | } | |
1504 | } | |
1505 | } else { | |
b186a592 MC |
1506 | ENDPOINT role = (context & SSL_EXT_TLS1_2_SERVER_HELLO) != 0 |
1507 | ? ENDPOINT_CLIENT : ENDPOINT_BOTH; | |
1508 | ||
1509 | /* | |
1510 | * If we didn't ask for it then there must be a custom extension, | |
1511 | * otherwise this is unsolicited. | |
1512 | */ | |
1513 | if (custom_ext_find(&s->cert->custext, role, | |
1514 | TLSEXT_TYPE_signed_certificate_timestamp, | |
1515 | NULL) == NULL) { | |
f63a17d6 MC |
1516 | SSLfatal(s, TLS1_AD_UNSUPPORTED_EXTENSION, SSL_F_TLS_PARSE_STOC_SCT, |
1517 | SSL_R_BAD_EXTENSION); | |
b186a592 MC |
1518 | return 0; |
1519 | } | |
1520 | ||
f63a17d6 | 1521 | if (!custom_ext_parse(s, context, |
43ae5eed MC |
1522 | TLSEXT_TYPE_signed_certificate_timestamp, |
1523 | PACKET_data(pkt), PACKET_remaining(pkt), | |
f63a17d6 MC |
1524 | x, chainidx)) { |
1525 | /* SSLfatal already called */ | |
6dd083fd | 1526 | return 0; |
f63a17d6 | 1527 | } |
6dd083fd MC |
1528 | } |
1529 | ||
1530 | return 1; | |
1531 | } | |
1532 | #endif | |
1533 | ||
1534 | ||
1535 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
1536 | /* | |
1537 | * ssl_next_proto_validate validates a Next Protocol Negotiation block. No | |
1538 | * elements of zero length are allowed and the set of elements must exactly | |
1539 | * fill the length of the block. Returns 1 on success or 0 on failure. | |
1540 | */ | |
f63a17d6 | 1541 | static int ssl_next_proto_validate(SSL *s, PACKET *pkt) |
6dd083fd MC |
1542 | { |
1543 | PACKET tmp_protocol; | |
1544 | ||
1545 | while (PACKET_remaining(pkt)) { | |
1546 | if (!PACKET_get_length_prefixed_1(pkt, &tmp_protocol) | |
f63a17d6 MC |
1547 | || PACKET_remaining(&tmp_protocol) == 0) { |
1548 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_SSL_NEXT_PROTO_VALIDATE, | |
1549 | SSL_R_BAD_EXTENSION); | |
6dd083fd | 1550 | return 0; |
f63a17d6 | 1551 | } |
6dd083fd MC |
1552 | } |
1553 | ||
1554 | return 1; | |
1555 | } | |
1556 | ||
61138358 | 1557 | int tls_parse_stoc_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1558 | size_t chainidx) |
6dd083fd MC |
1559 | { |
1560 | unsigned char *selected; | |
1561 | unsigned char selected_len; | |
1562 | PACKET tmppkt; | |
1563 | ||
1266eefd | 1564 | /* Check if we are in a renegotiation. If so ignore this extension */ |
c7f47786 | 1565 | if (!SSL_IS_FIRST_HANDSHAKE(s)) |
6dd083fd MC |
1566 | return 1; |
1567 | ||
1568 | /* We must have requested it. */ | |
aff8c126 | 1569 | if (s->ctx->ext.npn_select_cb == NULL) { |
f63a17d6 MC |
1570 | SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION, SSL_F_TLS_PARSE_STOC_NPN, |
1571 | SSL_R_BAD_EXTENSION); | |
6dd083fd MC |
1572 | return 0; |
1573 | } | |
1266eefd | 1574 | |
6dd083fd MC |
1575 | /* The data must be valid */ |
1576 | tmppkt = *pkt; | |
f63a17d6 MC |
1577 | if (!ssl_next_proto_validate(s, &tmppkt)) { |
1578 | /* SSLfatal() already called */ | |
6dd083fd MC |
1579 | return 0; |
1580 | } | |
aff8c126 RS |
1581 | if (s->ctx->ext.npn_select_cb(s, &selected, &selected_len, |
1582 | PACKET_data(pkt), | |
1583 | PACKET_remaining(pkt), | |
1584 | s->ctx->ext.npn_select_cb_arg) != | |
6dd083fd | 1585 | SSL_TLSEXT_ERR_OK) { |
f63a17d6 MC |
1586 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_PARSE_STOC_NPN, |
1587 | SSL_R_BAD_EXTENSION); | |
6dd083fd MC |
1588 | return 0; |
1589 | } | |
1266eefd | 1590 | |
6dd083fd MC |
1591 | /* |
1592 | * Could be non-NULL if server has sent multiple NPN extensions in | |
1593 | * a single Serverhello | |
1594 | */ | |
aff8c126 RS |
1595 | OPENSSL_free(s->ext.npn); |
1596 | s->ext.npn = OPENSSL_malloc(selected_len); | |
1597 | if (s->ext.npn == NULL) { | |
f63a17d6 MC |
1598 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_NPN, |
1599 | ERR_R_INTERNAL_ERROR); | |
6dd083fd MC |
1600 | return 0; |
1601 | } | |
1602 | ||
aff8c126 RS |
1603 | memcpy(s->ext.npn, selected, selected_len); |
1604 | s->ext.npn_len = selected_len; | |
555cbb32 | 1605 | s->s3.npn_seen = 1; |
6dd083fd MC |
1606 | |
1607 | return 1; | |
1608 | } | |
1609 | #endif | |
1610 | ||
61138358 | 1611 | int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1612 | size_t chainidx) |
6dd083fd MC |
1613 | { |
1614 | size_t len; | |
1615 | ||
1616 | /* We must have requested it. */ | |
555cbb32 | 1617 | if (!s->s3.alpn_sent) { |
f63a17d6 MC |
1618 | SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION, SSL_F_TLS_PARSE_STOC_ALPN, |
1619 | SSL_R_BAD_EXTENSION); | |
6dd083fd MC |
1620 | return 0; |
1621 | } | |
1622 | /*- | |
1623 | * The extension data consists of: | |
1624 | * uint16 list_length | |
1625 | * uint8 proto_length; | |
1626 | * uint8 proto[proto_length]; | |
1627 | */ | |
1628 | if (!PACKET_get_net_2_len(pkt, &len) | |
1629 | || PACKET_remaining(pkt) != len || !PACKET_get_1_len(pkt, &len) | |
1630 | || PACKET_remaining(pkt) != len) { | |
f63a17d6 MC |
1631 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_ALPN, |
1632 | SSL_R_BAD_EXTENSION); | |
6dd083fd MC |
1633 | return 0; |
1634 | } | |
555cbb32 TS |
1635 | OPENSSL_free(s->s3.alpn_selected); |
1636 | s->s3.alpn_selected = OPENSSL_malloc(len); | |
1637 | if (s->s3.alpn_selected == NULL) { | |
f63a17d6 MC |
1638 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_ALPN, |
1639 | ERR_R_INTERNAL_ERROR); | |
6dd083fd MC |
1640 | return 0; |
1641 | } | |
555cbb32 | 1642 | if (!PACKET_copy_bytes(pkt, s->s3.alpn_selected, len)) { |
f63a17d6 MC |
1643 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_ALPN, |
1644 | SSL_R_BAD_EXTENSION); | |
6dd083fd MC |
1645 | return 0; |
1646 | } | |
555cbb32 | 1647 | s->s3.alpn_selected_len = len; |
6dd083fd | 1648 | |
0ef28021 MC |
1649 | if (s->session->ext.alpn_selected == NULL |
1650 | || s->session->ext.alpn_selected_len != len | |
555cbb32 | 1651 | || memcmp(s->session->ext.alpn_selected, s->s3.alpn_selected, len) |
0ef28021 | 1652 | != 0) { |
4be3a7c7 MC |
1653 | /* ALPN not consistent with the old session so cannot use early_data */ |
1654 | s->ext.early_data_ok = 0; | |
1655 | } | |
1656 | if (!s->hit) { | |
9d5db9c9 MC |
1657 | /* |
1658 | * This is a new session and so alpn_selected should have been | |
1659 | * initialised to NULL. We should update it with the selected ALPN. | |
1660 | */ | |
1661 | if (!ossl_assert(s->session->ext.alpn_selected == NULL)) { | |
1662 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_ALPN, | |
1663 | ERR_R_INTERNAL_ERROR); | |
1664 | return 0; | |
1665 | } | |
4be3a7c7 | 1666 | s->session->ext.alpn_selected = |
555cbb32 | 1667 | OPENSSL_memdup(s->s3.alpn_selected, s->s3.alpn_selected_len); |
4be3a7c7 | 1668 | if (s->session->ext.alpn_selected == NULL) { |
f63a17d6 MC |
1669 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_ALPN, |
1670 | ERR_R_INTERNAL_ERROR); | |
4be3a7c7 MC |
1671 | return 0; |
1672 | } | |
555cbb32 | 1673 | s->session->ext.alpn_selected_len = s->s3.alpn_selected_len; |
ae8d7d99 MC |
1674 | } |
1675 | ||
6dd083fd MC |
1676 | return 1; |
1677 | } | |
1678 | ||
1679 | #ifndef OPENSSL_NO_SRTP | |
61138358 | 1680 | int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1681 | size_t chainidx) |
6dd083fd MC |
1682 | { |
1683 | unsigned int id, ct, mki; | |
1684 | int i; | |
1685 | STACK_OF(SRTP_PROTECTION_PROFILE) *clnt; | |
1686 | SRTP_PROTECTION_PROFILE *prof; | |
1687 | ||
1266eefd MC |
1688 | if (!PACKET_get_net_2(pkt, &ct) || ct != 2 |
1689 | || !PACKET_get_net_2(pkt, &id) | |
1690 | || !PACKET_get_1(pkt, &mki) | |
1691 | || PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
1692 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_USE_SRTP, |
1693 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); | |
6dd083fd MC |
1694 | return 0; |
1695 | } | |
1696 | ||
1697 | if (mki != 0) { | |
1698 | /* Must be no MKI, since we never offer one */ | |
f63a17d6 MC |
1699 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_USE_SRTP, |
1700 | SSL_R_BAD_SRTP_MKI_VALUE); | |
6dd083fd MC |
1701 | return 0; |
1702 | } | |
1703 | ||
6dd083fd | 1704 | /* Throw an error if the server gave us an unsolicited extension */ |
1266eefd | 1705 | clnt = SSL_get_srtp_profiles(s); |
6dd083fd | 1706 | if (clnt == NULL) { |
f63a17d6 MC |
1707 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_USE_SRTP, |
1708 | SSL_R_NO_SRTP_PROFILES); | |
6dd083fd MC |
1709 | return 0; |
1710 | } | |
1711 | ||
1712 | /* | |
1713 | * Check to see if the server gave us something we support (and | |
1714 | * presumably offered) | |
1715 | */ | |
1716 | for (i = 0; i < sk_SRTP_PROTECTION_PROFILE_num(clnt); i++) { | |
1717 | prof = sk_SRTP_PROTECTION_PROFILE_value(clnt, i); | |
1718 | ||
1719 | if (prof->id == id) { | |
1720 | s->srtp_profile = prof; | |
6dd083fd MC |
1721 | return 1; |
1722 | } | |
1723 | } | |
1724 | ||
f63a17d6 MC |
1725 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_USE_SRTP, |
1726 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); | |
6dd083fd MC |
1727 | return 0; |
1728 | } | |
1729 | #endif | |
1730 | ||
61138358 | 1731 | int tls_parse_stoc_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1732 | size_t chainidx) |
6dd083fd MC |
1733 | { |
1734 | /* Ignore if inappropriate ciphersuite */ | |
1735 | if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC) | |
555cbb32 TS |
1736 | && s->s3.tmp.new_cipher->algorithm_mac != SSL_AEAD |
1737 | && s->s3.tmp.new_cipher->algorithm_enc != SSL_RC4) | |
28a31a0a | 1738 | s->ext.use_etm = 1; |
6dd083fd MC |
1739 | |
1740 | return 1; | |
1741 | } | |
1742 | ||
61138358 | 1743 | int tls_parse_stoc_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1744 | size_t chainidx) |
6dd083fd | 1745 | { |
088dfa13 TS |
1746 | if (s->options & SSL_OP_NO_EXTENDED_MASTER_SECRET) |
1747 | return 1; | |
555cbb32 | 1748 | s->s3.flags |= TLS1_FLAGS_RECEIVED_EXTMS; |
6dd083fd MC |
1749 | if (!s->hit) |
1750 | s->session->flags |= SSL_SESS_FLAG_EXTMS; | |
1751 | ||
1752 | return 1; | |
1753 | } | |
1754 | ||
88050dd1 MC |
1755 | int tls_parse_stoc_supported_versions(SSL *s, PACKET *pkt, unsigned int context, |
1756 | X509 *x, size_t chainidx) | |
1757 | { | |
1758 | unsigned int version; | |
1759 | ||
1760 | if (!PACKET_get_net_2(pkt, &version) | |
1761 | || PACKET_remaining(pkt) != 0) { | |
1762 | SSLfatal(s, SSL_AD_DECODE_ERROR, | |
1763 | SSL_F_TLS_PARSE_STOC_SUPPORTED_VERSIONS, | |
1764 | SSL_R_LENGTH_MISMATCH); | |
1765 | return 0; | |
1766 | } | |
1767 | ||
27e462f1 MC |
1768 | /* |
1769 | * The only protocol version we support which is valid in this extension in | |
1770 | * a ServerHello is TLSv1.3 therefore we shouldn't be getting anything else. | |
1771 | */ | |
1772 | if (version != TLS1_3_VERSION) { | |
1773 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, | |
1774 | SSL_F_TLS_PARSE_STOC_SUPPORTED_VERSIONS, | |
1775 | SSL_R_BAD_PROTOCOL_VERSION_NUMBER); | |
1776 | return 0; | |
1777 | } | |
1778 | ||
426dfc9f | 1779 | /* We ignore this extension for HRRs except to sanity check it */ |
27e462f1 | 1780 | if (context == SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST) |
426dfc9f | 1781 | return 1; |
426dfc9f | 1782 | |
88050dd1 MC |
1783 | /* We just set it here. We validate it in ssl_choose_client_version */ |
1784 | s->version = version; | |
1785 | ||
1786 | return 1; | |
1787 | } | |
1788 | ||
61138358 | 1789 | int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1790 | size_t chainidx) |
6dd083fd | 1791 | { |
3cf96e88 | 1792 | #ifndef OPENSSL_NO_TLS1_3 |
6dd083fd MC |
1793 | unsigned int group_id; |
1794 | PACKET encoded_pt; | |
555cbb32 | 1795 | EVP_PKEY *ckey = s->s3.tmp.pkey, *skey = NULL; |
6dd083fd MC |
1796 | |
1797 | /* Sanity check */ | |
555cbb32 | 1798 | if (ckey == NULL || s->s3.peer_tmp != NULL) { |
f63a17d6 MC |
1799 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_KEY_SHARE, |
1800 | ERR_R_INTERNAL_ERROR); | |
6dd083fd MC |
1801 | return 0; |
1802 | } | |
1803 | ||
1804 | if (!PACKET_get_net_2(pkt, &group_id)) { | |
f63a17d6 MC |
1805 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_KEY_SHARE, |
1806 | SSL_R_LENGTH_MISMATCH); | |
6dd083fd MC |
1807 | return 0; |
1808 | } | |
1809 | ||
fe874d27 | 1810 | if ((context & SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST) != 0) { |
f48d826e DSH |
1811 | const uint16_t *pgroups = NULL; |
1812 | size_t i, num_groups; | |
3847d426 MC |
1813 | |
1814 | if (PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
1815 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_KEY_SHARE, |
1816 | SSL_R_LENGTH_MISMATCH); | |
3847d426 MC |
1817 | return 0; |
1818 | } | |
1819 | ||
1820 | /* | |
1821 | * It is an error if the HelloRetryRequest wants a key_share that we | |
1822 | * already sent in the first ClientHello | |
1823 | */ | |
555cbb32 | 1824 | if (group_id == s->s3.group_id) { |
f63a17d6 MC |
1825 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1826 | SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE); | |
3847d426 MC |
1827 | return 0; |
1828 | } | |
1829 | ||
1830 | /* Validate the selected group is one we support */ | |
f48d826e DSH |
1831 | tls1_get_supported_groups(s, &pgroups, &num_groups); |
1832 | for (i = 0; i < num_groups; i++) { | |
1833 | if (group_id == pgroups[i]) | |
3847d426 MC |
1834 | break; |
1835 | } | |
f48d826e | 1836 | if (i >= num_groups |
9e84a42d | 1837 | || !tls_curve_allowed(s, group_id, SSL_SECOP_CURVE_SUPPORTED)) { |
f63a17d6 MC |
1838 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1839 | SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE); | |
3847d426 MC |
1840 | return 0; |
1841 | } | |
1842 | ||
555cbb32 TS |
1843 | s->s3.group_id = group_id; |
1844 | EVP_PKEY_free(s->s3.tmp.pkey); | |
1845 | s->s3.tmp.pkey = NULL; | |
3847d426 MC |
1846 | return 1; |
1847 | } | |
1848 | ||
555cbb32 | 1849 | if (group_id != s->s3.group_id) { |
6dd083fd MC |
1850 | /* |
1851 | * This isn't for the group that we sent in the original | |
1852 | * key_share! | |
1853 | */ | |
f63a17d6 MC |
1854 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_KEY_SHARE, |
1855 | SSL_R_BAD_KEY_SHARE); | |
6dd083fd MC |
1856 | return 0; |
1857 | } | |
1858 | ||
1859 | if (!PACKET_as_length_prefixed_2(pkt, &encoded_pt) | |
1860 | || PACKET_remaining(&encoded_pt) == 0) { | |
f63a17d6 MC |
1861 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_KEY_SHARE, |
1862 | SSL_R_LENGTH_MISMATCH); | |
6dd083fd MC |
1863 | return 0; |
1864 | } | |
1865 | ||
1866 | skey = ssl_generate_pkey(ckey); | |
1867 | if (skey == NULL) { | |
f63a17d6 MC |
1868 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_KEY_SHARE, |
1869 | ERR_R_MALLOC_FAILURE); | |
6dd083fd MC |
1870 | return 0; |
1871 | } | |
1872 | if (!EVP_PKEY_set1_tls_encodedpoint(skey, PACKET_data(&encoded_pt), | |
1873 | PACKET_remaining(&encoded_pt))) { | |
f63a17d6 MC |
1874 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_KEY_SHARE, |
1875 | SSL_R_BAD_ECPOINT); | |
a1d6a0b6 | 1876 | EVP_PKEY_free(skey); |
6dd083fd MC |
1877 | return 0; |
1878 | } | |
1879 | ||
1880 | if (ssl_derive(s, ckey, skey, 1) == 0) { | |
f63a17d6 | 1881 | /* SSLfatal() already called */ |
6dd083fd MC |
1882 | EVP_PKEY_free(skey); |
1883 | return 0; | |
1884 | } | |
555cbb32 | 1885 | s->s3.peer_tmp = skey; |
3cf96e88 | 1886 | #endif |
6dd083fd MC |
1887 | |
1888 | return 1; | |
1889 | } | |
4ff65f77 | 1890 | |
cfef5027 | 1891 | int tls_parse_stoc_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1892 | size_t chainidx) |
cfef5027 MC |
1893 | { |
1894 | PACKET cookie; | |
1895 | ||
1896 | if (!PACKET_as_length_prefixed_2(pkt, &cookie) | |
1897 | || !PACKET_memdup(&cookie, &s->ext.tls13_cookie, | |
1898 | &s->ext.tls13_cookie_len)) { | |
f63a17d6 MC |
1899 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_COOKIE, |
1900 | SSL_R_LENGTH_MISMATCH); | |
cfef5027 MC |
1901 | return 0; |
1902 | } | |
1903 | ||
1904 | return 1; | |
1905 | } | |
1906 | ||
38df5a45 | 1907 | int tls_parse_stoc_early_data(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 1908 | X509 *x, size_t chainidx) |
38df5a45 | 1909 | { |
fe874d27 | 1910 | if (context == SSL_EXT_TLS1_3_NEW_SESSION_TICKET) { |
6594189f MC |
1911 | unsigned long max_early_data; |
1912 | ||
1913 | if (!PACKET_get_net_4(pkt, &max_early_data) | |
1914 | || PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
1915 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_EARLY_DATA, |
1916 | SSL_R_INVALID_MAX_EARLY_DATA); | |
6594189f MC |
1917 | return 0; |
1918 | } | |
1919 | ||
1920 | s->session->ext.max_early_data = max_early_data; | |
1921 | ||
1922 | return 1; | |
1923 | } | |
1924 | ||
38df5a45 | 1925 | if (PACKET_remaining(pkt) != 0) { |
f63a17d6 MC |
1926 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_EARLY_DATA, |
1927 | SSL_R_BAD_EXTENSION); | |
38df5a45 MC |
1928 | return 0; |
1929 | } | |
1930 | ||
4be3a7c7 | 1931 | if (!s->ext.early_data_ok |
c96ce52c | 1932 | || !s->hit) { |
38df5a45 MC |
1933 | /* |
1934 | * If we get here then we didn't send early data, or we didn't resume | |
4be3a7c7 MC |
1935 | * using the first identity, or the SNI/ALPN is not consistent so the |
1936 | * server should not be accepting it. | |
38df5a45 | 1937 | */ |
f63a17d6 MC |
1938 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_EARLY_DATA, |
1939 | SSL_R_BAD_EXTENSION); | |
38df5a45 MC |
1940 | return 0; |
1941 | } | |
1942 | ||
1943 | s->ext.early_data = SSL_EARLY_DATA_ACCEPTED; | |
1944 | ||
1945 | return 1; | |
1946 | } | |
1947 | ||
61138358 | 1948 | int tls_parse_stoc_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1949 | size_t chainidx) |
4ff65f77 MC |
1950 | { |
1951 | #ifndef OPENSSL_NO_TLS1_3 | |
1952 | unsigned int identity; | |
1953 | ||
1954 | if (!PACKET_get_net_2(pkt, &identity) || PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
1955 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_PSK, |
1956 | SSL_R_LENGTH_MISMATCH); | |
4ff65f77 MC |
1957 | return 0; |
1958 | } | |
1959 | ||
c96ce52c MC |
1960 | if (identity >= (unsigned int)s->ext.tick_identity) { |
1961 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_PSK, | |
1962 | SSL_R_BAD_PSK_IDENTITY); | |
1963 | return 0; | |
1964 | } | |
1965 | ||
1966 | /* | |
1967 | * Session resumption tickets are always sent before PSK tickets. If the | |
1968 | * ticket index is 0 then it must be for a session resumption ticket if we | |
1969 | * sent two tickets, or if we didn't send a PSK ticket. | |
1970 | */ | |
1971 | if (identity == 0 && (s->psksession == NULL || s->ext.tick_identity == 2)) { | |
9368f865 MC |
1972 | s->hit = 1; |
1973 | SSL_SESSION_free(s->psksession); | |
1974 | s->psksession = NULL; | |
1975 | return 1; | |
1976 | } | |
1977 | ||
c96ce52c MC |
1978 | if (s->psksession == NULL) { |
1979 | /* Should never happen */ | |
1980 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_PSK, | |
1981 | ERR_R_INTERNAL_ERROR); | |
4ff65f77 MC |
1982 | return 0; |
1983 | } | |
1984 | ||
add8d0e9 MC |
1985 | /* |
1986 | * If we used the external PSK for sending early_data then s->early_secret | |
1987 | * is already set up, so don't overwrite it. Otherwise we copy the | |
1988 | * early_secret across that we generated earlier. | |
1989 | */ | |
1990 | if ((s->early_data_state != SSL_EARLY_DATA_WRITE_RETRY | |
1991 | && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING) | |
1992 | || s->session->ext.max_early_data > 0 | |
1993 | || s->psksession->ext.max_early_data == 0) | |
1994 | memcpy(s->early_secret, s->psksession->early_secret, EVP_MAX_MD_SIZE); | |
1995 | ||
9368f865 MC |
1996 | SSL_SESSION_free(s->session); |
1997 | s->session = s->psksession; | |
1998 | s->psksession = NULL; | |
4ff65f77 | 1999 | s->hit = 1; |
c96ce52c MC |
2000 | /* Early data is only allowed if we used the first ticket */ |
2001 | if (identity != 0) | |
2002 | s->ext.early_data_ok = 0; | |
4ff65f77 MC |
2003 | #endif |
2004 | ||
2005 | return 1; | |
2006 | } |