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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 MC |
36 | { |
37 | if (s->tlsext_hostname == NULL) | |
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) | |
47 | || !WPACKET_sub_memcpy_u16(pkt, s->tlsext_hostname, | |
48 | strlen(s->tlsext_hostname)) | |
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 */ | |
148 | pcurves = s->tlsext_supportedgroupslist; | |
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 | |
194 | && s->session->tlsext_tick != NULL) { | |
195 | ticklen = s->session->tlsext_ticklen; | |
196 | } else if (s->session && s->tlsext_session_ticket != NULL | |
197 | && s->tlsext_session_ticket->data != NULL) { | |
198 | ticklen = s->tlsext_session_ticket->length; | |
199 | s->session->tlsext_tick = OPENSSL_malloc(ticklen); | |
200 | if (s->session->tlsext_tick == NULL) { | |
7fe97c07 | 201 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET, |
ab83e314 MC |
202 | ERR_R_INTERNAL_ERROR); |
203 | return 0; | |
204 | } | |
205 | memcpy(s->session->tlsext_tick, | |
206 | s->tlsext_session_ticket->data, ticklen); | |
207 | s->session->tlsext_ticklen = ticklen; | |
208 | } else { | |
209 | ticklen = 0; | |
210 | } | |
211 | ||
212 | if (ticklen == 0 && s->tlsext_session_ticket != NULL && | |
213 | s->tlsext_session_ticket->data == NULL) | |
214 | return 1; | |
215 | ||
216 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket) | |
217 | || !WPACKET_sub_memcpy_u16(pkt, s->session->tlsext_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 | ||
ab83e314 MC |
260 | if (s->tlsext_status_type != TLSEXT_STATUSTYPE_ocsp) |
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 | } | |
272 | for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++) { | |
273 | unsigned char *idbytes; | |
1266eefd MC |
274 | OCSP_RESPID *id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i); |
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 | } | |
291 | if (s->tlsext_ocsp_exts) { | |
292 | unsigned char *extbytes; | |
293 | int extlen = i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, NULL); | |
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) | |
301 | || i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, &extbytes) | |
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 MC |
320 | { |
321 | if (s->ctx->next_proto_select_cb == NULL || s->s3->tmp.finish_md_len != 0) | |
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 | */ | |
347 | if (s->alpn_client_proto_list == NULL || s->s3->tmp.finish_md_len != 0) | |
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) | |
354 | || !WPACKET_sub_memcpy_u16(pkt, s->alpn_client_proto_list, | |
355 | s->alpn_client_proto_list_len) | |
356 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 357 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ALPN, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
358 | return 0; |
359 | } | |
360 | s->s3->alpn_sent = 1; | |
361 | ||
362 | return 1; | |
363 | } | |
364 | ||
365 | ||
366 | #ifndef OPENSSL_NO_SRTP | |
8521ced6 | 367 | int tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx, |
30aeba43 | 368 | int *al) |
ab83e314 MC |
369 | { |
370 | STACK_OF(SRTP_PROTECTION_PROFILE) *clnt = SSL_get_srtp_profiles(s); | |
1266eefd | 371 | int i, end; |
ab83e314 MC |
372 | |
373 | if (clnt == NULL) | |
374 | return 1; | |
375 | ||
376 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp) | |
377 | /* Sub-packet for SRTP extension */ | |
378 | || !WPACKET_start_sub_packet_u16(pkt) | |
379 | /* Sub-packet for the protection profile list */ | |
380 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 381 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
382 | return 0; |
383 | } | |
1266eefd MC |
384 | |
385 | end = sk_SRTP_PROTECTION_PROFILE_num(clnt); | |
386 | for (i = 0; i < end; i++) { | |
387 | const SRTP_PROTECTION_PROFILE *prof = | |
388 | sk_SRTP_PROTECTION_PROFILE_value(clnt, i); | |
389 | ||
ab83e314 | 390 | if (prof == NULL || !WPACKET_put_bytes_u16(pkt, prof->id)) { |
7fe97c07 | 391 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
392 | return 0; |
393 | } | |
394 | } | |
395 | if (!WPACKET_close(pkt) | |
396 | /* Add an empty use_mki value */ | |
397 | || !WPACKET_put_bytes_u8(pkt, 0) | |
398 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 399 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
400 | return 0; |
401 | } | |
402 | ||
403 | return 1; | |
404 | } | |
405 | #endif | |
406 | ||
8521ced6 MC |
407 | int tls_construct_ctos_etm(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx, |
408 | int *al) | |
ab83e314 MC |
409 | { |
410 | if (s->options & SSL_OP_NO_ENCRYPT_THEN_MAC) | |
411 | return 1; | |
412 | ||
413 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac) | |
414 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 415 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ETM, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
416 | return 0; |
417 | } | |
418 | ||
419 | return 1; | |
420 | } | |
421 | ||
422 | #ifndef OPENSSL_NO_CT | |
8521ced6 MC |
423 | int tls_construct_ctos_sct(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx, |
424 | int *al) | |
ab83e314 MC |
425 | { |
426 | if (s->ct_validation_callback == NULL) | |
427 | return 1; | |
428 | ||
e96e0f8e MC |
429 | /* Not defined for client Certificates */ |
430 | if (x != NULL) | |
431 | return 1; | |
432 | ||
ab83e314 MC |
433 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signed_certificate_timestamp) |
434 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 435 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SCT, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
436 | return 0; |
437 | } | |
438 | ||
439 | return 1; | |
440 | } | |
441 | #endif | |
442 | ||
8521ced6 MC |
443 | int tls_construct_ctos_ems(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx, |
444 | int *al) | |
ab83e314 MC |
445 | { |
446 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret) | |
447 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 448 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EMS, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
449 | return 0; |
450 | } | |
451 | ||
452 | return 1; | |
453 | } | |
454 | ||
30aeba43 | 455 | int tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt, X509 *x, |
8521ced6 | 456 | size_t chainidx, int *al) |
ab83e314 MC |
457 | { |
458 | int currv, min_version, max_version, reason; | |
459 | ||
460 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_versions) | |
461 | || !WPACKET_start_sub_packet_u16(pkt) | |
462 | || !WPACKET_start_sub_packet_u8(pkt)) { | |
7fe97c07 | 463 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, |
ab83e314 MC |
464 | ERR_R_INTERNAL_ERROR); |
465 | return 0; | |
466 | } | |
467 | ||
468 | reason = ssl_get_client_min_max_version(s, &min_version, &max_version); | |
469 | if (reason != 0) { | |
7fe97c07 | 470 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, reason); |
ab83e314 MC |
471 | return 0; |
472 | } | |
473 | ||
474 | /* | |
475 | * TODO(TLS1.3): There is some discussion on the TLS list as to wheter | |
476 | * we should include versions <TLS1.2. For the moment we do. To be | |
477 | * reviewed later. | |
478 | */ | |
479 | for (currv = max_version; currv >= min_version; currv--) { | |
480 | /* TODO(TLS1.3): Remove this first if clause prior to release!! */ | |
481 | if (currv == TLS1_3_VERSION) { | |
482 | if (!WPACKET_put_bytes_u16(pkt, TLS1_3_VERSION_DRAFT)) { | |
7fe97c07 | 483 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, |
ab83e314 MC |
484 | ERR_R_INTERNAL_ERROR); |
485 | return 0; | |
486 | } | |
487 | } else if (!WPACKET_put_bytes_u16(pkt, currv)) { | |
7fe97c07 | 488 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, |
ab83e314 MC |
489 | ERR_R_INTERNAL_ERROR); |
490 | return 0; | |
491 | } | |
492 | } | |
493 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
7fe97c07 | 494 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, |
ab83e314 MC |
495 | ERR_R_INTERNAL_ERROR); |
496 | return 0; | |
497 | } | |
498 | ||
499 | return 1; | |
500 | } | |
501 | ||
8521ced6 | 502 | int tls_construct_ctos_key_share(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx, |
30aeba43 | 503 | int *al) |
ab83e314 | 504 | { |
3cf96e88 | 505 | #ifndef OPENSSL_NO_TLS1_3 |
ab83e314 MC |
506 | size_t i, sharessent = 0, num_curves = 0; |
507 | const unsigned char *pcurves = NULL; | |
508 | ||
509 | /* key_share extension */ | |
510 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
511 | /* Extension data sub-packet */ | |
512 | || !WPACKET_start_sub_packet_u16(pkt) | |
513 | /* KeyShare list sub-packet */ | |
514 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 515 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
516 | return 0; |
517 | } | |
518 | ||
519 | pcurves = s->tlsext_supportedgroupslist; | |
520 | if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) { | |
7fe97c07 | 521 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
522 | return 0; |
523 | } | |
524 | ||
525 | /* | |
526 | * TODO(TLS1.3): Make the number of key_shares sent configurable. For | |
527 | * now, just send one | |
528 | */ | |
529 | for (i = 0; i < num_curves && sharessent < 1; i++, pcurves += 2) { | |
530 | unsigned char *encodedPoint = NULL; | |
531 | unsigned int curve_id = 0; | |
532 | EVP_PKEY *key_share_key = NULL; | |
533 | size_t encodedlen; | |
534 | ||
535 | if (!tls_curve_allowed(s, pcurves, SSL_SECOP_CURVE_SUPPORTED)) | |
536 | continue; | |
537 | ||
538 | if (s->s3->tmp.pkey != NULL) { | |
539 | /* Shouldn't happen! */ | |
7fe97c07 | 540 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
541 | return 0; |
542 | } | |
543 | ||
544 | /* Generate a key for this key_share */ | |
545 | curve_id = (pcurves[0] << 8) | pcurves[1]; | |
546 | key_share_key = ssl_generate_pkey_curve(curve_id); | |
547 | if (key_share_key == NULL) { | |
7fe97c07 | 548 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_EVP_LIB); |
ab83e314 MC |
549 | return 0; |
550 | } | |
551 | ||
552 | /* Encode the public key. */ | |
553 | encodedlen = EVP_PKEY_get1_tls_encodedpoint(key_share_key, | |
554 | &encodedPoint); | |
555 | if (encodedlen == 0) { | |
7fe97c07 | 556 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_EC_LIB); |
ab83e314 MC |
557 | EVP_PKEY_free(key_share_key); |
558 | return 0; | |
559 | } | |
560 | ||
561 | /* Create KeyShareEntry */ | |
562 | if (!WPACKET_put_bytes_u16(pkt, curve_id) | |
563 | || !WPACKET_sub_memcpy_u16(pkt, encodedPoint, encodedlen)) { | |
7fe97c07 | 564 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
565 | EVP_PKEY_free(key_share_key); |
566 | OPENSSL_free(encodedPoint); | |
567 | return 0; | |
568 | } | |
569 | ||
570 | /* | |
571 | * TODO(TLS1.3): When changing to send more than one key_share we're | |
572 | * going to need to be able to save more than one EVP_PKEY. For now | |
573 | * we reuse the existing tmp.pkey | |
574 | */ | |
575 | s->s3->group_id = curve_id; | |
576 | s->s3->tmp.pkey = key_share_key; | |
577 | sharessent++; | |
578 | OPENSSL_free(encodedPoint); | |
579 | } | |
580 | ||
581 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
7fe97c07 | 582 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
583 | return 0; |
584 | } | |
3cf96e88 | 585 | #endif |
ab83e314 MC |
586 | |
587 | return 1; | |
588 | } | |
589 | ||
1266eefd MC |
590 | #define F5_WORKAROUND_MIN_MSG_LEN 0xff |
591 | #define F5_WORKAROUND_MAX_MSG_LEN 0x200 | |
592 | ||
8521ced6 | 593 | int tls_construct_ctos_padding(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx, |
30aeba43 | 594 | int *al) |
ab83e314 MC |
595 | { |
596 | unsigned char *padbytes; | |
597 | size_t hlen; | |
598 | ||
599 | if ((s->options & SSL_OP_TLSEXT_PADDING) == 0) | |
600 | return 1; | |
601 | ||
602 | /* | |
603 | * Add padding to workaround bugs in F5 terminators. See | |
604 | * https://tools.ietf.org/html/draft-agl-tls-padding-03 NB: because this | |
1266eefd | 605 | * code calculates the length of all existing extensions it MUST always |
ab83e314 MC |
606 | * appear last. |
607 | */ | |
608 | if (!WPACKET_get_total_written(pkt, &hlen)) { | |
7fe97c07 | 609 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
610 | return 0; |
611 | } | |
612 | ||
1266eefd MC |
613 | if (hlen > F5_WORKAROUND_MIN_MSG_LEN && hlen < F5_WORKAROUND_MAX_MSG_LEN) { |
614 | /* Calculate the amond of padding we need to add */ | |
615 | hlen = F5_WORKAROUND_MAX_MSG_LEN - hlen; | |
616 | ||
617 | /* | |
618 | * Take off the size of extension header itself (2 bytes for type and | |
619 | * 2 bytes for length bytes) | |
620 | */ | |
ab83e314 MC |
621 | if (hlen >= 4) |
622 | hlen -= 4; | |
623 | else | |
624 | hlen = 0; | |
625 | ||
626 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_padding) | |
627 | || !WPACKET_sub_allocate_bytes_u16(pkt, hlen, &padbytes)) { | |
7fe97c07 | 628 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
629 | return 0; |
630 | } | |
631 | memset(padbytes, 0, hlen); | |
632 | } | |
633 | ||
634 | return 1; | |
635 | } | |
636 | ||
6dd083fd MC |
637 | /* |
638 | * Parse the server's renegotiation binding and abort if it's not right | |
639 | */ | |
8521ced6 | 640 | int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, |
f97d4c37 | 641 | int *al) |
6dd083fd MC |
642 | { |
643 | size_t expected_len = s->s3->previous_client_finished_len | |
644 | + s->s3->previous_server_finished_len; | |
645 | size_t ilen; | |
646 | const unsigned char *data; | |
647 | ||
648 | /* Check for logic errors */ | |
649 | assert(expected_len == 0 || s->s3->previous_client_finished_len != 0); | |
650 | assert(expected_len == 0 || s->s3->previous_server_finished_len != 0); | |
651 | ||
652 | /* Parse the length byte */ | |
653 | if (!PACKET_get_1_len(pkt, &ilen)) { | |
7fe97c07 | 654 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
655 | SSL_R_RENEGOTIATION_ENCODING_ERR); |
656 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
657 | return 0; | |
658 | } | |
659 | ||
660 | /* Consistency check */ | |
661 | if (PACKET_remaining(pkt) != ilen) { | |
7fe97c07 | 662 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
663 | SSL_R_RENEGOTIATION_ENCODING_ERR); |
664 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
665 | return 0; | |
666 | } | |
667 | ||
668 | /* Check that the extension matches */ | |
669 | if (ilen != expected_len) { | |
7fe97c07 | 670 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
671 | SSL_R_RENEGOTIATION_MISMATCH); |
672 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
673 | return 0; | |
674 | } | |
675 | ||
676 | if (!PACKET_get_bytes(pkt, &data, s->s3->previous_client_finished_len) | |
677 | || memcmp(data, s->s3->previous_client_finished, | |
678 | s->s3->previous_client_finished_len) != 0) { | |
7fe97c07 | 679 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
680 | SSL_R_RENEGOTIATION_MISMATCH); |
681 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
682 | return 0; | |
683 | } | |
684 | ||
685 | if (!PACKET_get_bytes(pkt, &data, s->s3->previous_server_finished_len) | |
686 | || memcmp(data, s->s3->previous_server_finished, | |
687 | s->s3->previous_server_finished_len) != 0) { | |
7fe97c07 | 688 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
689 | SSL_R_RENEGOTIATION_MISMATCH); |
690 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
691 | return 0; | |
692 | } | |
693 | s->s3->send_connection_binding = 1; | |
694 | ||
695 | return 1; | |
696 | } | |
697 | ||
8521ced6 | 698 | int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, |
f97d4c37 | 699 | int *al) |
6dd083fd MC |
700 | { |
701 | if (s->tlsext_hostname == NULL || PACKET_remaining(pkt) > 0) { | |
702 | *al = SSL_AD_UNRECOGNIZED_NAME; | |
703 | return 0; | |
704 | } | |
705 | ||
706 | if (!s->hit) { | |
707 | if (s->session->tlsext_hostname != NULL) { | |
708 | *al = SSL_AD_INTERNAL_ERROR; | |
709 | return 0; | |
710 | } | |
711 | s->session->tlsext_hostname = OPENSSL_strdup(s->tlsext_hostname); | |
712 | if (s->session->tlsext_hostname == NULL) { | |
713 | *al = SSL_AD_INTERNAL_ERROR; | |
714 | return 0; | |
715 | } | |
716 | } | |
717 | ||
718 | return 1; | |
719 | } | |
720 | ||
721 | #ifndef OPENSSL_NO_EC | |
8521ced6 | 722 | int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, |
f97d4c37 | 723 | int *al) |
6dd083fd MC |
724 | { |
725 | unsigned int ecpointformatlist_length; | |
726 | PACKET ecptformatlist; | |
727 | ||
728 | if (!PACKET_as_length_prefixed_1(pkt, &ecptformatlist)) { | |
729 | *al = SSL_AD_DECODE_ERROR; | |
730 | return 0; | |
731 | } | |
732 | if (!s->hit) { | |
733 | ecpointformatlist_length = PACKET_remaining(&ecptformatlist); | |
734 | s->session->tlsext_ecpointformatlist_length = 0; | |
735 | ||
736 | OPENSSL_free(s->session->tlsext_ecpointformatlist); | |
737 | s->session->tlsext_ecpointformatlist = | |
738 | OPENSSL_malloc(ecpointformatlist_length); | |
739 | if (s->session->tlsext_ecpointformatlist == NULL) { | |
740 | *al = SSL_AD_INTERNAL_ERROR; | |
741 | return 0; | |
742 | } | |
743 | ||
744 | s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length; | |
745 | ||
746 | if (!PACKET_copy_bytes(&ecptformatlist, | |
747 | s->session->tlsext_ecpointformatlist, | |
748 | ecpointformatlist_length)) { | |
749 | *al = SSL_AD_INTERNAL_ERROR; | |
750 | return 0; | |
751 | } | |
752 | } | |
753 | ||
754 | return 1; | |
755 | } | |
756 | #endif | |
757 | ||
8521ced6 | 758 | int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, |
f97d4c37 | 759 | int *al) |
6dd083fd | 760 | { |
1266eefd | 761 | if (s->tls_session_ticket_ext_cb != NULL && |
6dd083fd MC |
762 | !s->tls_session_ticket_ext_cb(s, PACKET_data(pkt), |
763 | PACKET_remaining(pkt), | |
764 | s->tls_session_ticket_ext_cb_arg)) { | |
765 | *al = SSL_AD_INTERNAL_ERROR; | |
766 | return 0; | |
767 | } | |
1266eefd | 768 | |
6dd083fd MC |
769 | if (!tls_use_ticket(s) || PACKET_remaining(pkt) > 0) { |
770 | *al = SSL_AD_UNSUPPORTED_EXTENSION; | |
771 | return 0; | |
772 | } | |
1266eefd | 773 | |
6dd083fd MC |
774 | s->tlsext_ticket_expected = 1; |
775 | ||
776 | return 1; | |
777 | } | |
778 | ||
ab83e314 | 779 | #ifndef OPENSSL_NO_OCSP |
8521ced6 | 780 | int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, |
f97d4c37 | 781 | int *al) |
6dd083fd MC |
782 | { |
783 | /* | |
f63e4288 MC |
784 | * MUST only be sent if we've requested a status |
785 | * request message. In TLS <= 1.2 it must also be empty. | |
6dd083fd | 786 | */ |
cbb09544 | 787 | if (s->tlsext_status_type == TLSEXT_STATUSTYPE_nothing |
f63e4288 | 788 | || (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) > 0)) { |
6dd083fd MC |
789 | *al = SSL_AD_UNSUPPORTED_EXTENSION; |
790 | return 0; | |
791 | } | |
f63e4288 MC |
792 | |
793 | if (SSL_IS_TLS13(s)) { | |
794 | /* We only know how to handle this if it's for the first Certificate in | |
795 | * the chain. We ignore any other repsonses. | |
796 | */ | |
8521ced6 | 797 | if (chainidx != 0) |
f63e4288 MC |
798 | return 1; |
799 | return tls_process_cert_status_body(s, pkt, al); | |
800 | } | |
801 | ||
6dd083fd MC |
802 | /* Set flag to expect CertificateStatus message */ |
803 | s->tlsext_status_expected = 1; | |
804 | ||
805 | return 1; | |
806 | } | |
ab83e314 | 807 | #endif |
6dd083fd MC |
808 | |
809 | ||
810 | #ifndef OPENSSL_NO_CT | |
8521ced6 | 811 | int tls_parse_stoc_sct(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al) |
6dd083fd MC |
812 | { |
813 | /* | |
814 | * Only take it if we asked for it - i.e if there is no CT validation | |
815 | * callback set, then a custom extension MAY be processing it, so we | |
816 | * need to let control continue to flow to that. | |
817 | */ | |
818 | if (s->ct_validation_callback != NULL) { | |
819 | size_t size = PACKET_remaining(pkt); | |
820 | ||
821 | /* Simply copy it off for later processing */ | |
1266eefd MC |
822 | OPENSSL_free(s->tlsext_scts); |
823 | s->tlsext_scts = NULL; | |
824 | ||
6dd083fd MC |
825 | s->tlsext_scts_len = size; |
826 | if (size > 0) { | |
827 | s->tlsext_scts = OPENSSL_malloc(size); | |
828 | if (s->tlsext_scts == NULL | |
829 | || !PACKET_copy_bytes(pkt, s->tlsext_scts, size)) { | |
830 | *al = SSL_AD_INTERNAL_ERROR; | |
831 | return 0; | |
832 | } | |
833 | } | |
834 | } else { | |
835 | if (custom_ext_parse(s, 0, TLSEXT_TYPE_signed_certificate_timestamp, | |
836 | PACKET_data(pkt), PACKET_remaining(pkt), al) <= 0) | |
837 | return 0; | |
838 | } | |
839 | ||
840 | return 1; | |
841 | } | |
842 | #endif | |
843 | ||
844 | ||
845 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
846 | /* | |
847 | * ssl_next_proto_validate validates a Next Protocol Negotiation block. No | |
848 | * elements of zero length are allowed and the set of elements must exactly | |
849 | * fill the length of the block. Returns 1 on success or 0 on failure. | |
850 | */ | |
851 | static int ssl_next_proto_validate(PACKET *pkt) | |
852 | { | |
853 | PACKET tmp_protocol; | |
854 | ||
855 | while (PACKET_remaining(pkt)) { | |
856 | if (!PACKET_get_length_prefixed_1(pkt, &tmp_protocol) | |
857 | || PACKET_remaining(&tmp_protocol) == 0) | |
858 | return 0; | |
859 | } | |
860 | ||
861 | return 1; | |
862 | } | |
863 | ||
8521ced6 | 864 | int tls_parse_stoc_npn(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al) |
6dd083fd MC |
865 | { |
866 | unsigned char *selected; | |
867 | unsigned char selected_len; | |
868 | PACKET tmppkt; | |
869 | ||
1266eefd | 870 | /* Check if we are in a renegotiation. If so ignore this extension */ |
6dd083fd MC |
871 | if (s->s3->tmp.finish_md_len != 0) |
872 | return 1; | |
873 | ||
874 | /* We must have requested it. */ | |
875 | if (s->ctx->next_proto_select_cb == NULL) { | |
876 | *al = SSL_AD_UNSUPPORTED_EXTENSION; | |
877 | return 0; | |
878 | } | |
1266eefd | 879 | |
6dd083fd MC |
880 | /* The data must be valid */ |
881 | tmppkt = *pkt; | |
882 | if (!ssl_next_proto_validate(&tmppkt)) { | |
883 | *al = SSL_AD_DECODE_ERROR; | |
884 | return 0; | |
885 | } | |
886 | if (s->ctx->next_proto_select_cb(s, &selected, &selected_len, | |
887 | PACKET_data(pkt), | |
888 | PACKET_remaining(pkt), | |
889 | s->ctx->next_proto_select_cb_arg) != | |
890 | SSL_TLSEXT_ERR_OK) { | |
891 | *al = SSL_AD_INTERNAL_ERROR; | |
892 | return 0; | |
893 | } | |
1266eefd | 894 | |
6dd083fd MC |
895 | /* |
896 | * Could be non-NULL if server has sent multiple NPN extensions in | |
897 | * a single Serverhello | |
898 | */ | |
899 | OPENSSL_free(s->next_proto_negotiated); | |
900 | s->next_proto_negotiated = OPENSSL_malloc(selected_len); | |
901 | if (s->next_proto_negotiated == NULL) { | |
902 | *al = SSL_AD_INTERNAL_ERROR; | |
903 | return 0; | |
904 | } | |
905 | ||
906 | memcpy(s->next_proto_negotiated, selected, selected_len); | |
907 | s->next_proto_negotiated_len = selected_len; | |
908 | s->s3->next_proto_neg_seen = 1; | |
909 | ||
910 | return 1; | |
911 | } | |
912 | #endif | |
913 | ||
8521ced6 | 914 | int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al) |
6dd083fd MC |
915 | { |
916 | size_t len; | |
917 | ||
918 | /* We must have requested it. */ | |
919 | if (!s->s3->alpn_sent) { | |
920 | *al = SSL_AD_UNSUPPORTED_EXTENSION; | |
921 | return 0; | |
922 | } | |
923 | /*- | |
924 | * The extension data consists of: | |
925 | * uint16 list_length | |
926 | * uint8 proto_length; | |
927 | * uint8 proto[proto_length]; | |
928 | */ | |
929 | if (!PACKET_get_net_2_len(pkt, &len) | |
930 | || PACKET_remaining(pkt) != len || !PACKET_get_1_len(pkt, &len) | |
931 | || PACKET_remaining(pkt) != len) { | |
932 | *al = SSL_AD_DECODE_ERROR; | |
933 | return 0; | |
934 | } | |
935 | OPENSSL_free(s->s3->alpn_selected); | |
936 | s->s3->alpn_selected = OPENSSL_malloc(len); | |
937 | if (s->s3->alpn_selected == NULL) { | |
938 | *al = SSL_AD_INTERNAL_ERROR; | |
939 | return 0; | |
940 | } | |
941 | if (!PACKET_copy_bytes(pkt, s->s3->alpn_selected, len)) { | |
942 | *al = SSL_AD_DECODE_ERROR; | |
943 | return 0; | |
944 | } | |
945 | s->s3->alpn_selected_len = len; | |
946 | ||
947 | return 1; | |
948 | } | |
949 | ||
950 | #ifndef OPENSSL_NO_SRTP | |
8521ced6 MC |
951 | int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, |
952 | int *al) | |
6dd083fd MC |
953 | { |
954 | unsigned int id, ct, mki; | |
955 | int i; | |
956 | STACK_OF(SRTP_PROTECTION_PROFILE) *clnt; | |
957 | SRTP_PROTECTION_PROFILE *prof; | |
958 | ||
1266eefd MC |
959 | if (!PACKET_get_net_2(pkt, &ct) || ct != 2 |
960 | || !PACKET_get_net_2(pkt, &id) | |
961 | || !PACKET_get_1(pkt, &mki) | |
962 | || PACKET_remaining(pkt) != 0) { | |
7fe97c07 | 963 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, |
6dd083fd MC |
964 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
965 | *al = SSL_AD_DECODE_ERROR; | |
966 | return 0; | |
967 | } | |
968 | ||
969 | if (mki != 0) { | |
970 | /* Must be no MKI, since we never offer one */ | |
7fe97c07 | 971 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, SSL_R_BAD_SRTP_MKI_VALUE); |
6dd083fd MC |
972 | *al = SSL_AD_ILLEGAL_PARAMETER; |
973 | return 0; | |
974 | } | |
975 | ||
6dd083fd | 976 | /* Throw an error if the server gave us an unsolicited extension */ |
1266eefd | 977 | clnt = SSL_get_srtp_profiles(s); |
6dd083fd | 978 | if (clnt == NULL) { |
7fe97c07 | 979 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, SSL_R_NO_SRTP_PROFILES); |
6dd083fd MC |
980 | *al = SSL_AD_DECODE_ERROR; |
981 | return 0; | |
982 | } | |
983 | ||
984 | /* | |
985 | * Check to see if the server gave us something we support (and | |
986 | * presumably offered) | |
987 | */ | |
988 | for (i = 0; i < sk_SRTP_PROTECTION_PROFILE_num(clnt); i++) { | |
989 | prof = sk_SRTP_PROTECTION_PROFILE_value(clnt, i); | |
990 | ||
991 | if (prof->id == id) { | |
992 | s->srtp_profile = prof; | |
993 | *al = 0; | |
994 | return 1; | |
995 | } | |
996 | } | |
997 | ||
7fe97c07 | 998 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, |
6dd083fd MC |
999 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
1000 | *al = SSL_AD_DECODE_ERROR; | |
1001 | return 0; | |
1002 | } | |
1003 | #endif | |
1004 | ||
8521ced6 | 1005 | int tls_parse_stoc_etm(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al) |
6dd083fd MC |
1006 | { |
1007 | /* Ignore if inappropriate ciphersuite */ | |
1008 | if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC) | |
1009 | && s->s3->tmp.new_cipher->algorithm_mac != SSL_AEAD | |
1010 | && s->s3->tmp.new_cipher->algorithm_enc != SSL_RC4) | |
1011 | s->s3->flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC; | |
1012 | ||
1013 | return 1; | |
1014 | } | |
1015 | ||
8521ced6 | 1016 | int tls_parse_stoc_ems(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al) |
6dd083fd MC |
1017 | { |
1018 | s->s3->flags |= TLS1_FLAGS_RECEIVED_EXTMS; | |
1019 | if (!s->hit) | |
1020 | s->session->flags |= SSL_SESS_FLAG_EXTMS; | |
1021 | ||
1022 | return 1; | |
1023 | } | |
1024 | ||
8521ced6 | 1025 | int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, |
f97d4c37 | 1026 | int *al) |
6dd083fd | 1027 | { |
3cf96e88 | 1028 | #ifndef OPENSSL_NO_TLS1_3 |
6dd083fd MC |
1029 | unsigned int group_id; |
1030 | PACKET encoded_pt; | |
1031 | EVP_PKEY *ckey = s->s3->tmp.pkey, *skey = NULL; | |
1032 | ||
1033 | /* Sanity check */ | |
1034 | if (ckey == NULL) { | |
1035 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 1036 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1037 | return 0; |
1038 | } | |
1039 | ||
1040 | if (!PACKET_get_net_2(pkt, &group_id)) { | |
1041 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
7fe97c07 | 1042 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_LENGTH_MISMATCH); |
6dd083fd MC |
1043 | return 0; |
1044 | } | |
1045 | ||
1046 | if (group_id != s->s3->group_id) { | |
1047 | /* | |
1048 | * This isn't for the group that we sent in the original | |
1049 | * key_share! | |
1050 | */ | |
1051 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
7fe97c07 | 1052 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE); |
6dd083fd MC |
1053 | return 0; |
1054 | } | |
1055 | ||
1056 | if (!PACKET_as_length_prefixed_2(pkt, &encoded_pt) | |
1057 | || PACKET_remaining(&encoded_pt) == 0) { | |
1058 | *al = SSL_AD_DECODE_ERROR; | |
7fe97c07 | 1059 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_LENGTH_MISMATCH); |
6dd083fd MC |
1060 | return 0; |
1061 | } | |
1062 | ||
1063 | skey = ssl_generate_pkey(ckey); | |
1064 | if (skey == NULL) { | |
1065 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 1066 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_MALLOC_FAILURE); |
6dd083fd MC |
1067 | return 0; |
1068 | } | |
1069 | if (!EVP_PKEY_set1_tls_encodedpoint(skey, PACKET_data(&encoded_pt), | |
1070 | PACKET_remaining(&encoded_pt))) { | |
1071 | *al = SSL_AD_DECODE_ERROR; | |
7fe97c07 | 1072 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_ECPOINT); |
a1d6a0b6 | 1073 | EVP_PKEY_free(skey); |
6dd083fd MC |
1074 | return 0; |
1075 | } | |
1076 | ||
1077 | if (ssl_derive(s, ckey, skey, 1) == 0) { | |
1078 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 1079 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1080 | EVP_PKEY_free(skey); |
1081 | return 0; | |
1082 | } | |
1083 | EVP_PKEY_free(skey); | |
3cf96e88 | 1084 | #endif |
6dd083fd MC |
1085 | |
1086 | return 1; | |
1087 | } |