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6dd083fd MC |
1 | /* |
2 | * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved. | |
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 | ||
10 | #include <assert.h> | |
ab83e314 | 11 | #include <openssl/ocsp.h> |
6dd083fd MC |
12 | #include "../ssl_locl.h" |
13 | #include "statem_locl.h" | |
14 | ||
8521ced6 MC |
15 | int tls_construct_ctos_renegotiate(SSL *s, WPACKET *pkt, X509 *x, |
16 | size_t chainidx, int *al) | |
ab83e314 MC |
17 | { |
18 | /* Add RI if renegotiating */ | |
19 | if (!s->renegotiate) | |
20 | return 1; | |
21 | ||
22 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_renegotiate) | |
23 | || !WPACKET_start_sub_packet_u16(pkt) | |
24 | || !WPACKET_sub_memcpy_u8(pkt, s->s3->previous_client_finished, | |
25 | s->s3->previous_client_finished_len) | |
26 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 27 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_RENEGOTIATE, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
28 | return 0; |
29 | } | |
30 | ||
31 | return 1; | |
32 | } | |
33 | ||
8521ced6 MC |
34 | int tls_construct_ctos_server_name(SSL *s, WPACKET *pkt, X509 *x, |
35 | size_t chainidx, int *al) | |
ab83e314 | 36 | { |
aff8c126 | 37 | if (s->ext.hostname == NULL) |
ab83e314 MC |
38 | return 1; |
39 | ||
40 | /* Add TLS extension servername to the Client Hello message */ | |
41 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_server_name) | |
42 | /* Sub-packet for server_name extension */ | |
43 | || !WPACKET_start_sub_packet_u16(pkt) | |
44 | /* Sub-packet for servername list (always 1 hostname)*/ | |
45 | || !WPACKET_start_sub_packet_u16(pkt) | |
46 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_NAMETYPE_host_name) | |
aff8c126 RS |
47 | || !WPACKET_sub_memcpy_u16(pkt, s->ext.hostname, |
48 | strlen(s->ext.hostname)) | |
ab83e314 MC |
49 | || !WPACKET_close(pkt) |
50 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 51 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SERVER_NAME, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
52 | return 0; |
53 | } | |
54 | ||
55 | return 1; | |
56 | } | |
57 | ||
58 | #ifndef OPENSSL_NO_SRP | |
8521ced6 MC |
59 | int tls_construct_ctos_srp(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx, |
60 | int *al) | |
ab83e314 MC |
61 | { |
62 | /* Add SRP username if there is one */ | |
63 | if (s->srp_ctx.login == NULL) | |
64 | return 1; | |
65 | ||
66 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_srp) | |
67 | /* Sub-packet for SRP extension */ | |
68 | || !WPACKET_start_sub_packet_u16(pkt) | |
69 | || !WPACKET_start_sub_packet_u8(pkt) | |
70 | /* login must not be zero...internal error if so */ | |
71 | || !WPACKET_set_flags(pkt, WPACKET_FLAGS_NON_ZERO_LENGTH) | |
72 | || !WPACKET_memcpy(pkt, s->srp_ctx.login, | |
73 | strlen(s->srp_ctx.login)) | |
74 | || !WPACKET_close(pkt) | |
75 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 76 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SRP, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
77 | return 0; |
78 | } | |
79 | ||
80 | return 1; | |
81 | } | |
82 | #endif | |
83 | ||
84 | #ifndef OPENSSL_NO_EC | |
85 | static int use_ecc(SSL *s) | |
86 | { | |
1266eefd | 87 | int i, end; |
ab83e314 MC |
88 | unsigned long alg_k, alg_a; |
89 | STACK_OF(SSL_CIPHER) *cipher_stack = NULL; | |
90 | ||
91 | /* See if we support any ECC ciphersuites */ | |
92 | if (s->version == SSL3_VERSION) | |
93 | return 0; | |
94 | ||
ab83e314 | 95 | cipher_stack = SSL_get_ciphers(s); |
1266eefd MC |
96 | end = sk_SSL_CIPHER_num(cipher_stack); |
97 | for (i = 0; i < end; i++) { | |
ab83e314 MC |
98 | const SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i); |
99 | ||
100 | alg_k = c->algorithm_mkey; | |
101 | alg_a = c->algorithm_auth; | |
102 | if ((alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) | |
1266eefd MC |
103 | || (alg_a & SSL_aECDSA) |
104 | || c->min_tls >= TLS1_3_VERSION) | |
ab83e314 | 105 | break; |
ab83e314 MC |
106 | } |
107 | ||
1266eefd | 108 | return i < end; |
ab83e314 MC |
109 | } |
110 | ||
30aeba43 | 111 | int tls_construct_ctos_ec_pt_formats(SSL *s, WPACKET *pkt, X509 *x, |
8521ced6 | 112 | size_t chainidx, int *al) |
ab83e314 MC |
113 | { |
114 | const unsigned char *pformats; | |
115 | size_t num_formats; | |
116 | ||
117 | if (!use_ecc(s)) | |
118 | return 1; | |
119 | ||
120 | /* Add TLS extension ECPointFormats to the ClientHello message */ | |
ab83e314 MC |
121 | tls1_get_formatlist(s, &pformats, &num_formats); |
122 | ||
123 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_ec_point_formats) | |
124 | /* Sub-packet for formats extension */ | |
125 | || !WPACKET_start_sub_packet_u16(pkt) | |
126 | || !WPACKET_sub_memcpy_u8(pkt, pformats, num_formats) | |
127 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 128 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
129 | return 0; |
130 | } | |
131 | ||
132 | return 1; | |
133 | } | |
134 | ||
30aeba43 | 135 | int tls_construct_ctos_supported_groups(SSL *s, WPACKET *pkt, X509 *x, |
8521ced6 | 136 | size_t chainidx, int *al) |
ab83e314 MC |
137 | { |
138 | const unsigned char *pcurves = NULL, *pcurvestmp; | |
139 | size_t num_curves = 0, i; | |
140 | ||
141 | if (!use_ecc(s)) | |
142 | return 1; | |
143 | ||
144 | /* | |
145 | * Add TLS extension supported_groups to the ClientHello message | |
146 | */ | |
147 | /* TODO(TLS1.3): Add support for DHE groups */ | |
aff8c126 | 148 | pcurves = s->ext.supportedgroups; |
ab83e314 | 149 | if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) { |
7fe97c07 | 150 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, |
ab83e314 MC |
151 | ERR_R_INTERNAL_ERROR); |
152 | return 0; | |
153 | } | |
154 | pcurvestmp = pcurves; | |
155 | ||
156 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_groups) | |
157 | /* Sub-packet for supported_groups extension */ | |
158 | || !WPACKET_start_sub_packet_u16(pkt) | |
159 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 160 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, |
ab83e314 MC |
161 | ERR_R_INTERNAL_ERROR); |
162 | return 0; | |
163 | } | |
164 | /* Copy curve ID if supported */ | |
165 | for (i = 0; i < num_curves; i++, pcurvestmp += 2) { | |
166 | if (tls_curve_allowed(s, pcurves, SSL_SECOP_CURVE_SUPPORTED)) { | |
167 | if (!WPACKET_put_bytes_u8(pkt, pcurvestmp[0]) | |
168 | || !WPACKET_put_bytes_u8(pkt, pcurvestmp[1])) { | |
7fe97c07 | 169 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, |
ab83e314 MC |
170 | ERR_R_INTERNAL_ERROR); |
171 | return 0; | |
172 | } | |
173 | } | |
174 | } | |
175 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
7fe97c07 | 176 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, |
ab83e314 MC |
177 | ERR_R_INTERNAL_ERROR); |
178 | return 0; | |
179 | } | |
180 | ||
181 | return 1; | |
182 | } | |
183 | #endif | |
184 | ||
30aeba43 | 185 | int tls_construct_ctos_session_ticket(SSL *s, WPACKET *pkt, X509 *x, |
8521ced6 | 186 | size_t chainidx, int *al) |
ab83e314 MC |
187 | { |
188 | size_t ticklen; | |
189 | ||
190 | if (!tls_use_ticket(s)) | |
191 | return 1; | |
192 | ||
193 | if (!s->new_session && s->session != NULL | |
aff8c126 RS |
194 | && s->session->ext.tick != NULL) { |
195 | ticklen = s->session->ext.ticklen; | |
196 | } else if (s->session && s->ext.session_ticket != NULL | |
197 | && s->ext.session_ticket->data != NULL) { | |
198 | ticklen = s->ext.session_ticket->length; | |
199 | s->session->ext.tick = OPENSSL_malloc(ticklen); | |
200 | if (s->session->ext.tick == NULL) { | |
7fe97c07 | 201 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET, |
ab83e314 MC |
202 | ERR_R_INTERNAL_ERROR); |
203 | return 0; | |
204 | } | |
aff8c126 RS |
205 | memcpy(s->session->ext.tick, |
206 | s->ext.session_ticket->data, ticklen); | |
207 | s->session->ext.ticklen = ticklen; | |
ab83e314 MC |
208 | } else { |
209 | ticklen = 0; | |
210 | } | |
211 | ||
aff8c126 RS |
212 | if (ticklen == 0 && s->ext.session_ticket != NULL && |
213 | s->ext.session_ticket->data == NULL) | |
ab83e314 MC |
214 | return 1; |
215 | ||
216 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket) | |
aff8c126 | 217 | || !WPACKET_sub_memcpy_u16(pkt, s->session->ext.tick, ticklen)) { |
7fe97c07 | 218 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
219 | return 0; |
220 | } | |
221 | ||
222 | return 1; | |
223 | } | |
224 | ||
8521ced6 | 225 | int tls_construct_ctos_sig_algs(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx, |
30aeba43 | 226 | int *al) |
ab83e314 MC |
227 | { |
228 | size_t salglen; | |
229 | const unsigned char *salg; | |
230 | ||
231 | if (!SSL_CLIENT_USE_SIGALGS(s)) | |
232 | return 1; | |
233 | ||
234 | salglen = tls12_get_psigalgs(s, &salg); | |
ab83e314 MC |
235 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signature_algorithms) |
236 | /* Sub-packet for sig-algs extension */ | |
237 | || !WPACKET_start_sub_packet_u16(pkt) | |
238 | /* Sub-packet for the actual list */ | |
239 | || !WPACKET_start_sub_packet_u16(pkt) | |
240 | || !tls12_copy_sigalgs(s, pkt, salg, salglen) | |
241 | || !WPACKET_close(pkt) | |
242 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 243 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SIG_ALGS, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
244 | return 0; |
245 | } | |
246 | ||
247 | return 1; | |
248 | } | |
249 | ||
250 | #ifndef OPENSSL_NO_OCSP | |
30aeba43 | 251 | int tls_construct_ctos_status_request(SSL *s, WPACKET *pkt, X509 *x, |
8521ced6 | 252 | size_t chainidx, int *al) |
ab83e314 MC |
253 | { |
254 | int i; | |
255 | ||
e96e0f8e MC |
256 | /* This extension isn't defined for client Certificates */ |
257 | if (x != NULL) | |
258 | return 1; | |
259 | ||
aff8c126 | 260 | if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) |
ab83e314 MC |
261 | return 1; |
262 | ||
263 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request) | |
264 | /* Sub-packet for status request extension */ | |
265 | || !WPACKET_start_sub_packet_u16(pkt) | |
266 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_STATUSTYPE_ocsp) | |
267 | /* Sub-packet for the ids */ | |
268 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 269 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
270 | return 0; |
271 | } | |
aff8c126 | 272 | for (i = 0; i < sk_OCSP_RESPID_num(s->ext.ocsp.ids); i++) { |
ab83e314 | 273 | unsigned char *idbytes; |
aff8c126 | 274 | OCSP_RESPID *id = sk_OCSP_RESPID_value(s->ext.ocsp.ids, i); |
1266eefd | 275 | int idlen = i2d_OCSP_RESPID(id, NULL); |
ab83e314 | 276 | |
ab83e314 MC |
277 | if (idlen <= 0 |
278 | /* Sub-packet for an individual id */ | |
279 | || !WPACKET_sub_allocate_bytes_u16(pkt, idlen, &idbytes) | |
280 | || i2d_OCSP_RESPID(id, &idbytes) != idlen) { | |
7fe97c07 | 281 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, |
ab83e314 MC |
282 | ERR_R_INTERNAL_ERROR); |
283 | return 0; | |
284 | } | |
285 | } | |
286 | if (!WPACKET_close(pkt) | |
287 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 288 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
289 | return 0; |
290 | } | |
aff8c126 | 291 | if (s->ext.ocsp.exts) { |
ab83e314 | 292 | unsigned char *extbytes; |
aff8c126 | 293 | int extlen = i2d_X509_EXTENSIONS(s->ext.ocsp.exts, NULL); |
ab83e314 MC |
294 | |
295 | if (extlen < 0) { | |
7fe97c07 | 296 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, |
ab83e314 MC |
297 | ERR_R_INTERNAL_ERROR); |
298 | return 0; | |
299 | } | |
300 | if (!WPACKET_allocate_bytes(pkt, extlen, &extbytes) | |
aff8c126 | 301 | || i2d_X509_EXTENSIONS(s->ext.ocsp.exts, &extbytes) |
ab83e314 | 302 | != extlen) { |
7fe97c07 | 303 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, |
ab83e314 MC |
304 | ERR_R_INTERNAL_ERROR); |
305 | return 0; | |
306 | } | |
307 | } | |
308 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
7fe97c07 | 309 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
310 | return 0; |
311 | } | |
312 | ||
313 | return 1; | |
314 | } | |
315 | #endif | |
316 | ||
317 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
8521ced6 MC |
318 | int tls_construct_ctos_npn(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx, |
319 | int *al) | |
ab83e314 | 320 | { |
aff8c126 | 321 | if (s->ctx->ext.npn_select_cb == NULL || s->s3->tmp.finish_md_len != 0) |
ab83e314 MC |
322 | return 1; |
323 | ||
324 | /* | |
325 | * The client advertises an empty extension to indicate its support | |
326 | * for Next Protocol Negotiation | |
327 | */ | |
328 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_next_proto_neg) | |
329 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 330 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_NPN, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
331 | return 0; |
332 | } | |
333 | ||
334 | return 1; | |
335 | } | |
336 | #endif | |
337 | ||
8521ced6 | 338 | int tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx, |
30aeba43 | 339 | int *al) |
ab83e314 MC |
340 | { |
341 | s->s3->alpn_sent = 0; | |
342 | ||
343 | /* | |
344 | * finish_md_len is non-zero during a renegotiation, so | |
345 | * this avoids sending ALPN during the renegotiation | |
346 | */ | |
aff8c126 | 347 | if (s->ext.alpn == NULL || s->s3->tmp.finish_md_len != 0) |
ab83e314 MC |
348 | return 1; |
349 | ||
350 | if (!WPACKET_put_bytes_u16(pkt, | |
351 | TLSEXT_TYPE_application_layer_protocol_negotiation) | |
352 | /* Sub-packet ALPN extension */ | |
353 | || !WPACKET_start_sub_packet_u16(pkt) | |
aff8c126 | 354 | || !WPACKET_sub_memcpy_u16(pkt, s->ext.alpn, s->ext.alpn_len) |
ab83e314 | 355 | || !WPACKET_close(pkt)) { |
7fe97c07 | 356 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ALPN, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
357 | return 0; |
358 | } | |
359 | s->s3->alpn_sent = 1; | |
360 | ||
361 | return 1; | |
362 | } | |
363 | ||
364 | ||
365 | #ifndef OPENSSL_NO_SRTP | |
8521ced6 | 366 | int tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx, |
30aeba43 | 367 | int *al) |
ab83e314 MC |
368 | { |
369 | STACK_OF(SRTP_PROTECTION_PROFILE) *clnt = SSL_get_srtp_profiles(s); | |
1266eefd | 370 | int i, end; |
ab83e314 MC |
371 | |
372 | if (clnt == NULL) | |
373 | return 1; | |
374 | ||
375 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp) | |
376 | /* Sub-packet for SRTP extension */ | |
377 | || !WPACKET_start_sub_packet_u16(pkt) | |
378 | /* Sub-packet for the protection profile list */ | |
379 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 380 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
381 | return 0; |
382 | } | |
1266eefd MC |
383 | |
384 | end = sk_SRTP_PROTECTION_PROFILE_num(clnt); | |
385 | for (i = 0; i < end; i++) { | |
386 | const SRTP_PROTECTION_PROFILE *prof = | |
387 | sk_SRTP_PROTECTION_PROFILE_value(clnt, i); | |
388 | ||
ab83e314 | 389 | if (prof == NULL || !WPACKET_put_bytes_u16(pkt, prof->id)) { |
7fe97c07 | 390 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
391 | return 0; |
392 | } | |
393 | } | |
394 | if (!WPACKET_close(pkt) | |
395 | /* Add an empty use_mki value */ | |
396 | || !WPACKET_put_bytes_u8(pkt, 0) | |
397 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 398 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
399 | return 0; |
400 | } | |
401 | ||
402 | return 1; | |
403 | } | |
404 | #endif | |
405 | ||
8521ced6 MC |
406 | int tls_construct_ctos_etm(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx, |
407 | int *al) | |
ab83e314 MC |
408 | { |
409 | if (s->options & SSL_OP_NO_ENCRYPT_THEN_MAC) | |
410 | return 1; | |
411 | ||
412 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac) | |
413 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 414 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ETM, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
415 | return 0; |
416 | } | |
417 | ||
418 | return 1; | |
419 | } | |
420 | ||
421 | #ifndef OPENSSL_NO_CT | |
8521ced6 MC |
422 | int tls_construct_ctos_sct(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx, |
423 | int *al) | |
ab83e314 MC |
424 | { |
425 | if (s->ct_validation_callback == NULL) | |
426 | return 1; | |
427 | ||
e96e0f8e MC |
428 | /* Not defined for client Certificates */ |
429 | if (x != NULL) | |
430 | return 1; | |
431 | ||
ab83e314 MC |
432 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signed_certificate_timestamp) |
433 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 434 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SCT, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
435 | return 0; |
436 | } | |
437 | ||
438 | return 1; | |
439 | } | |
440 | #endif | |
441 | ||
8521ced6 MC |
442 | int tls_construct_ctos_ems(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx, |
443 | int *al) | |
ab83e314 MC |
444 | { |
445 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret) | |
446 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 447 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EMS, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
448 | return 0; |
449 | } | |
450 | ||
451 | return 1; | |
452 | } | |
453 | ||
30aeba43 | 454 | int tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt, X509 *x, |
8521ced6 | 455 | size_t chainidx, int *al) |
ab83e314 MC |
456 | { |
457 | int currv, min_version, max_version, reason; | |
458 | ||
459 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_versions) | |
460 | || !WPACKET_start_sub_packet_u16(pkt) | |
461 | || !WPACKET_start_sub_packet_u8(pkt)) { | |
7fe97c07 | 462 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, |
ab83e314 MC |
463 | ERR_R_INTERNAL_ERROR); |
464 | return 0; | |
465 | } | |
466 | ||
467 | reason = ssl_get_client_min_max_version(s, &min_version, &max_version); | |
468 | if (reason != 0) { | |
7fe97c07 | 469 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, reason); |
ab83e314 MC |
470 | return 0; |
471 | } | |
472 | ||
473 | /* | |
474 | * TODO(TLS1.3): There is some discussion on the TLS list as to wheter | |
475 | * we should include versions <TLS1.2. For the moment we do. To be | |
476 | * reviewed later. | |
477 | */ | |
478 | for (currv = max_version; currv >= min_version; currv--) { | |
479 | /* TODO(TLS1.3): Remove this first if clause prior to release!! */ | |
480 | if (currv == TLS1_3_VERSION) { | |
481 | if (!WPACKET_put_bytes_u16(pkt, TLS1_3_VERSION_DRAFT)) { | |
7fe97c07 | 482 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, |
ab83e314 MC |
483 | ERR_R_INTERNAL_ERROR); |
484 | return 0; | |
485 | } | |
486 | } else if (!WPACKET_put_bytes_u16(pkt, currv)) { | |
7fe97c07 | 487 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, |
ab83e314 MC |
488 | ERR_R_INTERNAL_ERROR); |
489 | return 0; | |
490 | } | |
491 | } | |
492 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
7fe97c07 | 493 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, |
ab83e314 MC |
494 | ERR_R_INTERNAL_ERROR); |
495 | return 0; | |
496 | } | |
497 | ||
498 | return 1; | |
499 | } | |
500 | ||
8521ced6 | 501 | int tls_construct_ctos_key_share(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx, |
30aeba43 | 502 | int *al) |
ab83e314 | 503 | { |
3cf96e88 | 504 | #ifndef OPENSSL_NO_TLS1_3 |
ab83e314 MC |
505 | size_t i, sharessent = 0, num_curves = 0; |
506 | const unsigned char *pcurves = NULL; | |
507 | ||
508 | /* key_share extension */ | |
509 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
510 | /* Extension data sub-packet */ | |
511 | || !WPACKET_start_sub_packet_u16(pkt) | |
512 | /* KeyShare list sub-packet */ | |
513 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 514 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
515 | return 0; |
516 | } | |
517 | ||
aff8c126 | 518 | pcurves = s->ext.supportedgroups; |
ab83e314 | 519 | if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) { |
7fe97c07 | 520 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
521 | return 0; |
522 | } | |
523 | ||
524 | /* | |
525 | * TODO(TLS1.3): Make the number of key_shares sent configurable. For | |
526 | * now, just send one | |
527 | */ | |
528 | for (i = 0; i < num_curves && sharessent < 1; i++, pcurves += 2) { | |
529 | unsigned char *encodedPoint = NULL; | |
530 | unsigned int curve_id = 0; | |
531 | EVP_PKEY *key_share_key = NULL; | |
532 | size_t encodedlen; | |
533 | ||
534 | if (!tls_curve_allowed(s, pcurves, SSL_SECOP_CURVE_SUPPORTED)) | |
535 | continue; | |
536 | ||
537 | if (s->s3->tmp.pkey != NULL) { | |
538 | /* Shouldn't happen! */ | |
7fe97c07 | 539 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
540 | return 0; |
541 | } | |
542 | ||
543 | /* Generate a key for this key_share */ | |
544 | curve_id = (pcurves[0] << 8) | pcurves[1]; | |
545 | key_share_key = ssl_generate_pkey_curve(curve_id); | |
546 | if (key_share_key == NULL) { | |
7fe97c07 | 547 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_EVP_LIB); |
ab83e314 MC |
548 | return 0; |
549 | } | |
550 | ||
551 | /* Encode the public key. */ | |
552 | encodedlen = EVP_PKEY_get1_tls_encodedpoint(key_share_key, | |
553 | &encodedPoint); | |
554 | if (encodedlen == 0) { | |
7fe97c07 | 555 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_EC_LIB); |
ab83e314 MC |
556 | EVP_PKEY_free(key_share_key); |
557 | return 0; | |
558 | } | |
559 | ||
560 | /* Create KeyShareEntry */ | |
561 | if (!WPACKET_put_bytes_u16(pkt, curve_id) | |
562 | || !WPACKET_sub_memcpy_u16(pkt, encodedPoint, encodedlen)) { | |
7fe97c07 | 563 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
564 | EVP_PKEY_free(key_share_key); |
565 | OPENSSL_free(encodedPoint); | |
566 | return 0; | |
567 | } | |
568 | ||
569 | /* | |
570 | * TODO(TLS1.3): When changing to send more than one key_share we're | |
571 | * going to need to be able to save more than one EVP_PKEY. For now | |
572 | * we reuse the existing tmp.pkey | |
573 | */ | |
574 | s->s3->group_id = curve_id; | |
575 | s->s3->tmp.pkey = key_share_key; | |
576 | sharessent++; | |
577 | OPENSSL_free(encodedPoint); | |
578 | } | |
579 | ||
580 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
7fe97c07 | 581 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
582 | return 0; |
583 | } | |
3cf96e88 | 584 | #endif |
ab83e314 MC |
585 | |
586 | return 1; | |
587 | } | |
588 | ||
1266eefd MC |
589 | #define F5_WORKAROUND_MIN_MSG_LEN 0xff |
590 | #define F5_WORKAROUND_MAX_MSG_LEN 0x200 | |
591 | ||
8521ced6 | 592 | int tls_construct_ctos_padding(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx, |
30aeba43 | 593 | int *al) |
ab83e314 MC |
594 | { |
595 | unsigned char *padbytes; | |
596 | size_t hlen; | |
597 | ||
598 | if ((s->options & SSL_OP_TLSEXT_PADDING) == 0) | |
599 | return 1; | |
600 | ||
601 | /* | |
602 | * Add padding to workaround bugs in F5 terminators. See | |
603 | * https://tools.ietf.org/html/draft-agl-tls-padding-03 NB: because this | |
1266eefd | 604 | * code calculates the length of all existing extensions it MUST always |
ab83e314 MC |
605 | * appear last. |
606 | */ | |
607 | if (!WPACKET_get_total_written(pkt, &hlen)) { | |
7fe97c07 | 608 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
609 | return 0; |
610 | } | |
611 | ||
1266eefd MC |
612 | if (hlen > F5_WORKAROUND_MIN_MSG_LEN && hlen < F5_WORKAROUND_MAX_MSG_LEN) { |
613 | /* Calculate the amond of padding we need to add */ | |
614 | hlen = F5_WORKAROUND_MAX_MSG_LEN - hlen; | |
615 | ||
616 | /* | |
617 | * Take off the size of extension header itself (2 bytes for type and | |
618 | * 2 bytes for length bytes) | |
619 | */ | |
ab83e314 MC |
620 | if (hlen >= 4) |
621 | hlen -= 4; | |
622 | else | |
623 | hlen = 0; | |
624 | ||
625 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_padding) | |
626 | || !WPACKET_sub_allocate_bytes_u16(pkt, hlen, &padbytes)) { | |
7fe97c07 | 627 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
628 | return 0; |
629 | } | |
630 | memset(padbytes, 0, hlen); | |
631 | } | |
632 | ||
633 | return 1; | |
634 | } | |
635 | ||
6dd083fd MC |
636 | /* |
637 | * Parse the server's renegotiation binding and abort if it's not right | |
638 | */ | |
8521ced6 | 639 | int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, |
f97d4c37 | 640 | int *al) |
6dd083fd MC |
641 | { |
642 | size_t expected_len = s->s3->previous_client_finished_len | |
643 | + s->s3->previous_server_finished_len; | |
644 | size_t ilen; | |
645 | const unsigned char *data; | |
646 | ||
647 | /* Check for logic errors */ | |
648 | assert(expected_len == 0 || s->s3->previous_client_finished_len != 0); | |
649 | assert(expected_len == 0 || s->s3->previous_server_finished_len != 0); | |
650 | ||
651 | /* Parse the length byte */ | |
652 | if (!PACKET_get_1_len(pkt, &ilen)) { | |
7fe97c07 | 653 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
654 | SSL_R_RENEGOTIATION_ENCODING_ERR); |
655 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
656 | return 0; | |
657 | } | |
658 | ||
659 | /* Consistency check */ | |
660 | if (PACKET_remaining(pkt) != ilen) { | |
7fe97c07 | 661 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
662 | SSL_R_RENEGOTIATION_ENCODING_ERR); |
663 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
664 | return 0; | |
665 | } | |
666 | ||
667 | /* Check that the extension matches */ | |
668 | if (ilen != expected_len) { | |
7fe97c07 | 669 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
670 | SSL_R_RENEGOTIATION_MISMATCH); |
671 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
672 | return 0; | |
673 | } | |
674 | ||
675 | if (!PACKET_get_bytes(pkt, &data, s->s3->previous_client_finished_len) | |
676 | || memcmp(data, s->s3->previous_client_finished, | |
677 | s->s3->previous_client_finished_len) != 0) { | |
7fe97c07 | 678 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
679 | SSL_R_RENEGOTIATION_MISMATCH); |
680 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
681 | return 0; | |
682 | } | |
683 | ||
684 | if (!PACKET_get_bytes(pkt, &data, s->s3->previous_server_finished_len) | |
685 | || memcmp(data, s->s3->previous_server_finished, | |
686 | s->s3->previous_server_finished_len) != 0) { | |
7fe97c07 | 687 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
688 | SSL_R_RENEGOTIATION_MISMATCH); |
689 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
690 | return 0; | |
691 | } | |
692 | s->s3->send_connection_binding = 1; | |
693 | ||
694 | return 1; | |
695 | } | |
696 | ||
8521ced6 | 697 | int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, |
f97d4c37 | 698 | int *al) |
6dd083fd | 699 | { |
aff8c126 | 700 | if (s->ext.hostname == NULL || PACKET_remaining(pkt) > 0) { |
6dd083fd MC |
701 | *al = SSL_AD_UNRECOGNIZED_NAME; |
702 | return 0; | |
703 | } | |
704 | ||
705 | if (!s->hit) { | |
aff8c126 | 706 | if (s->session->ext.hostname != NULL) { |
6dd083fd MC |
707 | *al = SSL_AD_INTERNAL_ERROR; |
708 | return 0; | |
709 | } | |
aff8c126 RS |
710 | s->session->ext.hostname = OPENSSL_strdup(s->ext.hostname); |
711 | if (s->session->ext.hostname == NULL) { | |
6dd083fd MC |
712 | *al = SSL_AD_INTERNAL_ERROR; |
713 | return 0; | |
714 | } | |
715 | } | |
716 | ||
717 | return 1; | |
718 | } | |
719 | ||
720 | #ifndef OPENSSL_NO_EC | |
8521ced6 | 721 | int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, |
f97d4c37 | 722 | int *al) |
6dd083fd | 723 | { |
aff8c126 | 724 | unsigned int ecpointformats_len; |
6dd083fd MC |
725 | PACKET ecptformatlist; |
726 | ||
727 | if (!PACKET_as_length_prefixed_1(pkt, &ecptformatlist)) { | |
728 | *al = SSL_AD_DECODE_ERROR; | |
729 | return 0; | |
730 | } | |
731 | if (!s->hit) { | |
aff8c126 RS |
732 | ecpointformats_len = PACKET_remaining(&ecptformatlist); |
733 | s->session->ext.ecpointformats_len = 0; | |
6dd083fd | 734 | |
aff8c126 RS |
735 | OPENSSL_free(s->session->ext.ecpointformats); |
736 | s->session->ext.ecpointformats = OPENSSL_malloc(ecpointformats_len); | |
737 | if (s->session->ext.ecpointformats == NULL) { | |
6dd083fd MC |
738 | *al = SSL_AD_INTERNAL_ERROR; |
739 | return 0; | |
740 | } | |
741 | ||
aff8c126 | 742 | s->session->ext.ecpointformats_len = ecpointformats_len; |
6dd083fd MC |
743 | |
744 | if (!PACKET_copy_bytes(&ecptformatlist, | |
aff8c126 RS |
745 | s->session->ext.ecpointformats, |
746 | ecpointformats_len)) { | |
6dd083fd MC |
747 | *al = SSL_AD_INTERNAL_ERROR; |
748 | return 0; | |
749 | } | |
750 | } | |
751 | ||
752 | return 1; | |
753 | } | |
754 | #endif | |
755 | ||
8521ced6 | 756 | int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, |
f97d4c37 | 757 | int *al) |
6dd083fd | 758 | { |
aff8c126 RS |
759 | if (s->ext.session_ticket_cb != NULL && |
760 | !s->ext.session_ticket_cb(s, PACKET_data(pkt), | |
761 | PACKET_remaining(pkt), | |
762 | s->ext.session_ticket_cb_arg)) { | |
6dd083fd MC |
763 | *al = SSL_AD_INTERNAL_ERROR; |
764 | return 0; | |
765 | } | |
1266eefd | 766 | |
6dd083fd MC |
767 | if (!tls_use_ticket(s) || PACKET_remaining(pkt) > 0) { |
768 | *al = SSL_AD_UNSUPPORTED_EXTENSION; | |
769 | return 0; | |
770 | } | |
1266eefd | 771 | |
aff8c126 | 772 | s->ext.ticket_expected = 1; |
6dd083fd MC |
773 | |
774 | return 1; | |
775 | } | |
776 | ||
ab83e314 | 777 | #ifndef OPENSSL_NO_OCSP |
8521ced6 | 778 | int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, |
f97d4c37 | 779 | int *al) |
6dd083fd MC |
780 | { |
781 | /* | |
f63e4288 MC |
782 | * MUST only be sent if we've requested a status |
783 | * request message. In TLS <= 1.2 it must also be empty. | |
6dd083fd | 784 | */ |
aff8c126 | 785 | if (s->ext.status_type == TLSEXT_STATUSTYPE_nothing |
f63e4288 | 786 | || (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) > 0)) { |
6dd083fd MC |
787 | *al = SSL_AD_UNSUPPORTED_EXTENSION; |
788 | return 0; | |
789 | } | |
f63e4288 MC |
790 | |
791 | if (SSL_IS_TLS13(s)) { | |
792 | /* We only know how to handle this if it's for the first Certificate in | |
793 | * the chain. We ignore any other repsonses. | |
794 | */ | |
8521ced6 | 795 | if (chainidx != 0) |
f63e4288 MC |
796 | return 1; |
797 | return tls_process_cert_status_body(s, pkt, al); | |
798 | } | |
799 | ||
6dd083fd | 800 | /* Set flag to expect CertificateStatus message */ |
aff8c126 | 801 | s->ext.status_expected = 1; |
6dd083fd MC |
802 | |
803 | return 1; | |
804 | } | |
ab83e314 | 805 | #endif |
6dd083fd MC |
806 | |
807 | ||
808 | #ifndef OPENSSL_NO_CT | |
8521ced6 | 809 | int tls_parse_stoc_sct(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al) |
6dd083fd MC |
810 | { |
811 | /* | |
812 | * Only take it if we asked for it - i.e if there is no CT validation | |
813 | * callback set, then a custom extension MAY be processing it, so we | |
814 | * need to let control continue to flow to that. | |
815 | */ | |
816 | if (s->ct_validation_callback != NULL) { | |
817 | size_t size = PACKET_remaining(pkt); | |
818 | ||
819 | /* Simply copy it off for later processing */ | |
aff8c126 RS |
820 | OPENSSL_free(s->ext.scts); |
821 | s->ext.scts = NULL; | |
1266eefd | 822 | |
aff8c126 | 823 | s->ext.scts_len = size; |
6dd083fd | 824 | if (size > 0) { |
aff8c126 RS |
825 | s->ext.scts = OPENSSL_malloc(size); |
826 | if (s->ext.scts == NULL | |
827 | || !PACKET_copy_bytes(pkt, s->ext.scts, size)) { | |
6dd083fd MC |
828 | *al = SSL_AD_INTERNAL_ERROR; |
829 | return 0; | |
830 | } | |
831 | } | |
832 | } else { | |
833 | if (custom_ext_parse(s, 0, TLSEXT_TYPE_signed_certificate_timestamp, | |
834 | PACKET_data(pkt), PACKET_remaining(pkt), al) <= 0) | |
835 | return 0; | |
836 | } | |
837 | ||
838 | return 1; | |
839 | } | |
840 | #endif | |
841 | ||
842 | ||
843 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
844 | /* | |
845 | * ssl_next_proto_validate validates a Next Protocol Negotiation block. No | |
846 | * elements of zero length are allowed and the set of elements must exactly | |
847 | * fill the length of the block. Returns 1 on success or 0 on failure. | |
848 | */ | |
849 | static int ssl_next_proto_validate(PACKET *pkt) | |
850 | { | |
851 | PACKET tmp_protocol; | |
852 | ||
853 | while (PACKET_remaining(pkt)) { | |
854 | if (!PACKET_get_length_prefixed_1(pkt, &tmp_protocol) | |
855 | || PACKET_remaining(&tmp_protocol) == 0) | |
856 | return 0; | |
857 | } | |
858 | ||
859 | return 1; | |
860 | } | |
861 | ||
8521ced6 | 862 | int tls_parse_stoc_npn(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al) |
6dd083fd MC |
863 | { |
864 | unsigned char *selected; | |
865 | unsigned char selected_len; | |
866 | PACKET tmppkt; | |
867 | ||
1266eefd | 868 | /* Check if we are in a renegotiation. If so ignore this extension */ |
6dd083fd MC |
869 | if (s->s3->tmp.finish_md_len != 0) |
870 | return 1; | |
871 | ||
872 | /* We must have requested it. */ | |
aff8c126 | 873 | if (s->ctx->ext.npn_select_cb == NULL) { |
6dd083fd MC |
874 | *al = SSL_AD_UNSUPPORTED_EXTENSION; |
875 | return 0; | |
876 | } | |
1266eefd | 877 | |
6dd083fd MC |
878 | /* The data must be valid */ |
879 | tmppkt = *pkt; | |
880 | if (!ssl_next_proto_validate(&tmppkt)) { | |
881 | *al = SSL_AD_DECODE_ERROR; | |
882 | return 0; | |
883 | } | |
aff8c126 RS |
884 | if (s->ctx->ext.npn_select_cb(s, &selected, &selected_len, |
885 | PACKET_data(pkt), | |
886 | PACKET_remaining(pkt), | |
887 | s->ctx->ext.npn_select_cb_arg) != | |
6dd083fd MC |
888 | SSL_TLSEXT_ERR_OK) { |
889 | *al = SSL_AD_INTERNAL_ERROR; | |
890 | return 0; | |
891 | } | |
1266eefd | 892 | |
6dd083fd MC |
893 | /* |
894 | * Could be non-NULL if server has sent multiple NPN extensions in | |
895 | * a single Serverhello | |
896 | */ | |
aff8c126 RS |
897 | OPENSSL_free(s->ext.npn); |
898 | s->ext.npn = OPENSSL_malloc(selected_len); | |
899 | if (s->ext.npn == NULL) { | |
6dd083fd MC |
900 | *al = SSL_AD_INTERNAL_ERROR; |
901 | return 0; | |
902 | } | |
903 | ||
aff8c126 RS |
904 | memcpy(s->ext.npn, selected, selected_len); |
905 | s->ext.npn_len = selected_len; | |
906 | s->s3->npn_seen = 1; | |
6dd083fd MC |
907 | |
908 | return 1; | |
909 | } | |
910 | #endif | |
911 | ||
8521ced6 | 912 | int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al) |
6dd083fd MC |
913 | { |
914 | size_t len; | |
915 | ||
916 | /* We must have requested it. */ | |
917 | if (!s->s3->alpn_sent) { | |
918 | *al = SSL_AD_UNSUPPORTED_EXTENSION; | |
919 | return 0; | |
920 | } | |
921 | /*- | |
922 | * The extension data consists of: | |
923 | * uint16 list_length | |
924 | * uint8 proto_length; | |
925 | * uint8 proto[proto_length]; | |
926 | */ | |
927 | if (!PACKET_get_net_2_len(pkt, &len) | |
928 | || PACKET_remaining(pkt) != len || !PACKET_get_1_len(pkt, &len) | |
929 | || PACKET_remaining(pkt) != len) { | |
930 | *al = SSL_AD_DECODE_ERROR; | |
931 | return 0; | |
932 | } | |
933 | OPENSSL_free(s->s3->alpn_selected); | |
934 | s->s3->alpn_selected = OPENSSL_malloc(len); | |
935 | if (s->s3->alpn_selected == NULL) { | |
936 | *al = SSL_AD_INTERNAL_ERROR; | |
937 | return 0; | |
938 | } | |
939 | if (!PACKET_copy_bytes(pkt, s->s3->alpn_selected, len)) { | |
940 | *al = SSL_AD_DECODE_ERROR; | |
941 | return 0; | |
942 | } | |
943 | s->s3->alpn_selected_len = len; | |
944 | ||
945 | return 1; | |
946 | } | |
947 | ||
948 | #ifndef OPENSSL_NO_SRTP | |
8521ced6 MC |
949 | int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, |
950 | int *al) | |
6dd083fd MC |
951 | { |
952 | unsigned int id, ct, mki; | |
953 | int i; | |
954 | STACK_OF(SRTP_PROTECTION_PROFILE) *clnt; | |
955 | SRTP_PROTECTION_PROFILE *prof; | |
956 | ||
1266eefd MC |
957 | if (!PACKET_get_net_2(pkt, &ct) || ct != 2 |
958 | || !PACKET_get_net_2(pkt, &id) | |
959 | || !PACKET_get_1(pkt, &mki) | |
960 | || PACKET_remaining(pkt) != 0) { | |
7fe97c07 | 961 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, |
6dd083fd MC |
962 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
963 | *al = SSL_AD_DECODE_ERROR; | |
964 | return 0; | |
965 | } | |
966 | ||
967 | if (mki != 0) { | |
968 | /* Must be no MKI, since we never offer one */ | |
7fe97c07 | 969 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, SSL_R_BAD_SRTP_MKI_VALUE); |
6dd083fd MC |
970 | *al = SSL_AD_ILLEGAL_PARAMETER; |
971 | return 0; | |
972 | } | |
973 | ||
6dd083fd | 974 | /* Throw an error if the server gave us an unsolicited extension */ |
1266eefd | 975 | clnt = SSL_get_srtp_profiles(s); |
6dd083fd | 976 | if (clnt == NULL) { |
7fe97c07 | 977 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, SSL_R_NO_SRTP_PROFILES); |
6dd083fd MC |
978 | *al = SSL_AD_DECODE_ERROR; |
979 | return 0; | |
980 | } | |
981 | ||
982 | /* | |
983 | * Check to see if the server gave us something we support (and | |
984 | * presumably offered) | |
985 | */ | |
986 | for (i = 0; i < sk_SRTP_PROTECTION_PROFILE_num(clnt); i++) { | |
987 | prof = sk_SRTP_PROTECTION_PROFILE_value(clnt, i); | |
988 | ||
989 | if (prof->id == id) { | |
990 | s->srtp_profile = prof; | |
991 | *al = 0; | |
992 | return 1; | |
993 | } | |
994 | } | |
995 | ||
7fe97c07 | 996 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, |
6dd083fd MC |
997 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
998 | *al = SSL_AD_DECODE_ERROR; | |
999 | return 0; | |
1000 | } | |
1001 | #endif | |
1002 | ||
8521ced6 | 1003 | int tls_parse_stoc_etm(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al) |
6dd083fd MC |
1004 | { |
1005 | /* Ignore if inappropriate ciphersuite */ | |
1006 | if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC) | |
1007 | && s->s3->tmp.new_cipher->algorithm_mac != SSL_AEAD | |
1008 | && s->s3->tmp.new_cipher->algorithm_enc != SSL_RC4) | |
1009 | s->s3->flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC; | |
1010 | ||
1011 | return 1; | |
1012 | } | |
1013 | ||
8521ced6 | 1014 | int tls_parse_stoc_ems(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al) |
6dd083fd MC |
1015 | { |
1016 | s->s3->flags |= TLS1_FLAGS_RECEIVED_EXTMS; | |
1017 | if (!s->hit) | |
1018 | s->session->flags |= SSL_SESS_FLAG_EXTMS; | |
1019 | ||
1020 | return 1; | |
1021 | } | |
1022 | ||
8521ced6 | 1023 | int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, |
f97d4c37 | 1024 | int *al) |
6dd083fd | 1025 | { |
3cf96e88 | 1026 | #ifndef OPENSSL_NO_TLS1_3 |
6dd083fd MC |
1027 | unsigned int group_id; |
1028 | PACKET encoded_pt; | |
1029 | EVP_PKEY *ckey = s->s3->tmp.pkey, *skey = NULL; | |
1030 | ||
1031 | /* Sanity check */ | |
1032 | if (ckey == NULL) { | |
1033 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 1034 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1035 | return 0; |
1036 | } | |
1037 | ||
1038 | if (!PACKET_get_net_2(pkt, &group_id)) { | |
1039 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
7fe97c07 | 1040 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_LENGTH_MISMATCH); |
6dd083fd MC |
1041 | return 0; |
1042 | } | |
1043 | ||
1044 | if (group_id != s->s3->group_id) { | |
1045 | /* | |
1046 | * This isn't for the group that we sent in the original | |
1047 | * key_share! | |
1048 | */ | |
1049 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
7fe97c07 | 1050 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE); |
6dd083fd MC |
1051 | return 0; |
1052 | } | |
1053 | ||
1054 | if (!PACKET_as_length_prefixed_2(pkt, &encoded_pt) | |
1055 | || PACKET_remaining(&encoded_pt) == 0) { | |
1056 | *al = SSL_AD_DECODE_ERROR; | |
7fe97c07 | 1057 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_LENGTH_MISMATCH); |
6dd083fd MC |
1058 | return 0; |
1059 | } | |
1060 | ||
1061 | skey = ssl_generate_pkey(ckey); | |
1062 | if (skey == NULL) { | |
1063 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 1064 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_MALLOC_FAILURE); |
6dd083fd MC |
1065 | return 0; |
1066 | } | |
1067 | if (!EVP_PKEY_set1_tls_encodedpoint(skey, PACKET_data(&encoded_pt), | |
1068 | PACKET_remaining(&encoded_pt))) { | |
1069 | *al = SSL_AD_DECODE_ERROR; | |
7fe97c07 | 1070 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_ECPOINT); |
a1d6a0b6 | 1071 | EVP_PKEY_free(skey); |
6dd083fd MC |
1072 | return 0; |
1073 | } | |
1074 | ||
1075 | if (ssl_derive(s, ckey, skey, 1) == 0) { | |
1076 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 1077 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1078 | EVP_PKEY_free(skey); |
1079 | return 0; | |
1080 | } | |
1081 | EVP_PKEY_free(skey); | |
3cf96e88 | 1082 | #endif |
6dd083fd MC |
1083 | |
1084 | return 1; | |
1085 | } |