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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 | ||
30aeba43 MC |
15 | int tls_construct_ctos_renegotiate(SSL *s, WPACKET *pkt, X509 *x, size_t chain, |
16 | 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 | ||
30aeba43 MC |
34 | int tls_construct_ctos_server_name(SSL *s, WPACKET *pkt, X509 *x, size_t chain, |
35 | 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 | |
30aeba43 | 59 | int tls_construct_ctos_srp(SSL *s, WPACKET *pkt, X509 *x, size_t chain, int *al) |
ab83e314 MC |
60 | { |
61 | /* Add SRP username if there is one */ | |
62 | if (s->srp_ctx.login == NULL) | |
63 | return 1; | |
64 | ||
65 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_srp) | |
66 | /* Sub-packet for SRP extension */ | |
67 | || !WPACKET_start_sub_packet_u16(pkt) | |
68 | || !WPACKET_start_sub_packet_u8(pkt) | |
69 | /* login must not be zero...internal error if so */ | |
70 | || !WPACKET_set_flags(pkt, WPACKET_FLAGS_NON_ZERO_LENGTH) | |
71 | || !WPACKET_memcpy(pkt, s->srp_ctx.login, | |
72 | strlen(s->srp_ctx.login)) | |
73 | || !WPACKET_close(pkt) | |
74 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 75 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SRP, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
76 | return 0; |
77 | } | |
78 | ||
79 | return 1; | |
80 | } | |
81 | #endif | |
82 | ||
83 | #ifndef OPENSSL_NO_EC | |
84 | static int use_ecc(SSL *s) | |
85 | { | |
1266eefd | 86 | int i, end; |
ab83e314 MC |
87 | unsigned long alg_k, alg_a; |
88 | STACK_OF(SSL_CIPHER) *cipher_stack = NULL; | |
89 | ||
90 | /* See if we support any ECC ciphersuites */ | |
91 | if (s->version == SSL3_VERSION) | |
92 | return 0; | |
93 | ||
ab83e314 | 94 | cipher_stack = SSL_get_ciphers(s); |
1266eefd MC |
95 | end = sk_SSL_CIPHER_num(cipher_stack); |
96 | for (i = 0; i < end; i++) { | |
ab83e314 MC |
97 | const SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i); |
98 | ||
99 | alg_k = c->algorithm_mkey; | |
100 | alg_a = c->algorithm_auth; | |
101 | if ((alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) | |
1266eefd MC |
102 | || (alg_a & SSL_aECDSA) |
103 | || c->min_tls >= TLS1_3_VERSION) | |
ab83e314 | 104 | break; |
ab83e314 MC |
105 | } |
106 | ||
1266eefd | 107 | return i < end; |
ab83e314 MC |
108 | } |
109 | ||
30aeba43 MC |
110 | int tls_construct_ctos_ec_pt_formats(SSL *s, WPACKET *pkt, X509 *x, |
111 | size_t chain, int *al) | |
ab83e314 MC |
112 | { |
113 | const unsigned char *pformats; | |
114 | size_t num_formats; | |
115 | ||
116 | if (!use_ecc(s)) | |
117 | return 1; | |
118 | ||
119 | /* Add TLS extension ECPointFormats to the ClientHello message */ | |
ab83e314 MC |
120 | tls1_get_formatlist(s, &pformats, &num_formats); |
121 | ||
122 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_ec_point_formats) | |
123 | /* Sub-packet for formats extension */ | |
124 | || !WPACKET_start_sub_packet_u16(pkt) | |
125 | || !WPACKET_sub_memcpy_u8(pkt, pformats, num_formats) | |
126 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 127 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
128 | return 0; |
129 | } | |
130 | ||
131 | return 1; | |
132 | } | |
133 | ||
30aeba43 MC |
134 | int tls_construct_ctos_supported_groups(SSL *s, WPACKET *pkt, X509 *x, |
135 | size_t chain, int *al) | |
ab83e314 MC |
136 | { |
137 | const unsigned char *pcurves = NULL, *pcurvestmp; | |
138 | size_t num_curves = 0, i; | |
139 | ||
140 | if (!use_ecc(s)) | |
141 | return 1; | |
142 | ||
143 | /* | |
144 | * Add TLS extension supported_groups to the ClientHello message | |
145 | */ | |
146 | /* TODO(TLS1.3): Add support for DHE groups */ | |
147 | pcurves = s->tlsext_supportedgroupslist; | |
148 | if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) { | |
7fe97c07 | 149 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, |
ab83e314 MC |
150 | ERR_R_INTERNAL_ERROR); |
151 | return 0; | |
152 | } | |
153 | pcurvestmp = pcurves; | |
154 | ||
155 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_groups) | |
156 | /* Sub-packet for supported_groups extension */ | |
157 | || !WPACKET_start_sub_packet_u16(pkt) | |
158 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 159 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, |
ab83e314 MC |
160 | ERR_R_INTERNAL_ERROR); |
161 | return 0; | |
162 | } | |
163 | /* Copy curve ID if supported */ | |
164 | for (i = 0; i < num_curves; i++, pcurvestmp += 2) { | |
165 | if (tls_curve_allowed(s, pcurves, SSL_SECOP_CURVE_SUPPORTED)) { | |
166 | if (!WPACKET_put_bytes_u8(pkt, pcurvestmp[0]) | |
167 | || !WPACKET_put_bytes_u8(pkt, pcurvestmp[1])) { | |
7fe97c07 | 168 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, |
ab83e314 MC |
169 | ERR_R_INTERNAL_ERROR); |
170 | return 0; | |
171 | } | |
172 | } | |
173 | } | |
174 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
7fe97c07 | 175 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, |
ab83e314 MC |
176 | ERR_R_INTERNAL_ERROR); |
177 | return 0; | |
178 | } | |
179 | ||
180 | return 1; | |
181 | } | |
182 | #endif | |
183 | ||
30aeba43 MC |
184 | int tls_construct_ctos_session_ticket(SSL *s, WPACKET *pkt, X509 *x, |
185 | size_t chain, int *al) | |
ab83e314 MC |
186 | { |
187 | size_t ticklen; | |
188 | ||
189 | if (!tls_use_ticket(s)) | |
190 | return 1; | |
191 | ||
192 | if (!s->new_session && s->session != NULL | |
193 | && s->session->tlsext_tick != NULL) { | |
194 | ticklen = s->session->tlsext_ticklen; | |
195 | } else if (s->session && s->tlsext_session_ticket != NULL | |
196 | && s->tlsext_session_ticket->data != NULL) { | |
197 | ticklen = s->tlsext_session_ticket->length; | |
198 | s->session->tlsext_tick = OPENSSL_malloc(ticklen); | |
199 | if (s->session->tlsext_tick == NULL) { | |
7fe97c07 | 200 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET, |
ab83e314 MC |
201 | ERR_R_INTERNAL_ERROR); |
202 | return 0; | |
203 | } | |
204 | memcpy(s->session->tlsext_tick, | |
205 | s->tlsext_session_ticket->data, ticklen); | |
206 | s->session->tlsext_ticklen = ticklen; | |
207 | } else { | |
208 | ticklen = 0; | |
209 | } | |
210 | ||
211 | if (ticklen == 0 && s->tlsext_session_ticket != NULL && | |
212 | s->tlsext_session_ticket->data == NULL) | |
213 | return 1; | |
214 | ||
215 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket) | |
216 | || !WPACKET_sub_memcpy_u16(pkt, s->session->tlsext_tick, ticklen)) { | |
7fe97c07 | 217 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
218 | return 0; |
219 | } | |
220 | ||
221 | return 1; | |
222 | } | |
223 | ||
30aeba43 MC |
224 | int tls_construct_ctos_sig_algs(SSL *s, WPACKET *pkt, X509 *x, size_t chain, |
225 | int *al) | |
ab83e314 MC |
226 | { |
227 | size_t salglen; | |
228 | const unsigned char *salg; | |
229 | ||
230 | if (!SSL_CLIENT_USE_SIGALGS(s)) | |
231 | return 1; | |
232 | ||
233 | salglen = tls12_get_psigalgs(s, &salg); | |
ab83e314 MC |
234 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signature_algorithms) |
235 | /* Sub-packet for sig-algs extension */ | |
236 | || !WPACKET_start_sub_packet_u16(pkt) | |
237 | /* Sub-packet for the actual list */ | |
238 | || !WPACKET_start_sub_packet_u16(pkt) | |
239 | || !tls12_copy_sigalgs(s, pkt, salg, salglen) | |
240 | || !WPACKET_close(pkt) | |
241 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 242 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SIG_ALGS, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
243 | return 0; |
244 | } | |
245 | ||
246 | return 1; | |
247 | } | |
248 | ||
249 | #ifndef OPENSSL_NO_OCSP | |
30aeba43 MC |
250 | int tls_construct_ctos_status_request(SSL *s, WPACKET *pkt, X509 *x, |
251 | size_t chain, int *al) | |
ab83e314 MC |
252 | { |
253 | int i; | |
254 | ||
e96e0f8e MC |
255 | /* This extension isn't defined for client Certificates */ |
256 | if (x != NULL) | |
257 | return 1; | |
258 | ||
ab83e314 MC |
259 | if (s->tlsext_status_type != TLSEXT_STATUSTYPE_ocsp) |
260 | return 1; | |
261 | ||
262 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request) | |
263 | /* Sub-packet for status request extension */ | |
264 | || !WPACKET_start_sub_packet_u16(pkt) | |
265 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_STATUSTYPE_ocsp) | |
266 | /* Sub-packet for the ids */ | |
267 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 268 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
269 | return 0; |
270 | } | |
271 | for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++) { | |
272 | unsigned char *idbytes; | |
1266eefd MC |
273 | OCSP_RESPID *id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i); |
274 | int idlen = i2d_OCSP_RESPID(id, NULL); | |
ab83e314 | 275 | |
ab83e314 MC |
276 | if (idlen <= 0 |
277 | /* Sub-packet for an individual id */ | |
278 | || !WPACKET_sub_allocate_bytes_u16(pkt, idlen, &idbytes) | |
279 | || i2d_OCSP_RESPID(id, &idbytes) != idlen) { | |
7fe97c07 | 280 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, |
ab83e314 MC |
281 | ERR_R_INTERNAL_ERROR); |
282 | return 0; | |
283 | } | |
284 | } | |
285 | if (!WPACKET_close(pkt) | |
286 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 287 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
288 | return 0; |
289 | } | |
290 | if (s->tlsext_ocsp_exts) { | |
291 | unsigned char *extbytes; | |
292 | int extlen = i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, NULL); | |
293 | ||
294 | if (extlen < 0) { | |
7fe97c07 | 295 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, |
ab83e314 MC |
296 | ERR_R_INTERNAL_ERROR); |
297 | return 0; | |
298 | } | |
299 | if (!WPACKET_allocate_bytes(pkt, extlen, &extbytes) | |
300 | || i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, &extbytes) | |
301 | != extlen) { | |
7fe97c07 | 302 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, |
ab83e314 MC |
303 | ERR_R_INTERNAL_ERROR); |
304 | return 0; | |
305 | } | |
306 | } | |
307 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
7fe97c07 | 308 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
309 | return 0; |
310 | } | |
311 | ||
312 | return 1; | |
313 | } | |
314 | #endif | |
315 | ||
316 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
30aeba43 | 317 | int tls_construct_ctos_npn(SSL *s, WPACKET *pkt, X509 *x, size_t chain, int *al) |
ab83e314 MC |
318 | { |
319 | if (s->ctx->next_proto_select_cb == NULL || s->s3->tmp.finish_md_len != 0) | |
320 | return 1; | |
321 | ||
322 | /* | |
323 | * The client advertises an empty extension to indicate its support | |
324 | * for Next Protocol Negotiation | |
325 | */ | |
326 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_next_proto_neg) | |
327 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 328 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_NPN, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
329 | return 0; |
330 | } | |
331 | ||
332 | return 1; | |
333 | } | |
334 | #endif | |
335 | ||
30aeba43 MC |
336 | int tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, X509 *x, size_t chain, |
337 | int *al) | |
ab83e314 MC |
338 | { |
339 | s->s3->alpn_sent = 0; | |
340 | ||
341 | /* | |
342 | * finish_md_len is non-zero during a renegotiation, so | |
343 | * this avoids sending ALPN during the renegotiation | |
344 | */ | |
345 | if (s->alpn_client_proto_list == NULL || s->s3->tmp.finish_md_len != 0) | |
346 | return 1; | |
347 | ||
348 | if (!WPACKET_put_bytes_u16(pkt, | |
349 | TLSEXT_TYPE_application_layer_protocol_negotiation) | |
350 | /* Sub-packet ALPN extension */ | |
351 | || !WPACKET_start_sub_packet_u16(pkt) | |
352 | || !WPACKET_sub_memcpy_u16(pkt, s->alpn_client_proto_list, | |
353 | s->alpn_client_proto_list_len) | |
354 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 355 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ALPN, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
356 | return 0; |
357 | } | |
358 | s->s3->alpn_sent = 1; | |
359 | ||
360 | return 1; | |
361 | } | |
362 | ||
363 | ||
364 | #ifndef OPENSSL_NO_SRTP | |
30aeba43 MC |
365 | int tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt, X509 *x, size_t chain, |
366 | int *al) | |
ab83e314 MC |
367 | { |
368 | STACK_OF(SRTP_PROTECTION_PROFILE) *clnt = SSL_get_srtp_profiles(s); | |
1266eefd | 369 | int i, end; |
ab83e314 MC |
370 | |
371 | if (clnt == NULL) | |
372 | return 1; | |
373 | ||
374 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp) | |
375 | /* Sub-packet for SRTP extension */ | |
376 | || !WPACKET_start_sub_packet_u16(pkt) | |
377 | /* Sub-packet for the protection profile list */ | |
378 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 379 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
380 | return 0; |
381 | } | |
1266eefd MC |
382 | |
383 | end = sk_SRTP_PROTECTION_PROFILE_num(clnt); | |
384 | for (i = 0; i < end; i++) { | |
385 | const SRTP_PROTECTION_PROFILE *prof = | |
386 | sk_SRTP_PROTECTION_PROFILE_value(clnt, i); | |
387 | ||
ab83e314 | 388 | if (prof == NULL || !WPACKET_put_bytes_u16(pkt, prof->id)) { |
7fe97c07 | 389 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
390 | return 0; |
391 | } | |
392 | } | |
393 | if (!WPACKET_close(pkt) | |
394 | /* Add an empty use_mki value */ | |
395 | || !WPACKET_put_bytes_u8(pkt, 0) | |
396 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 397 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
398 | return 0; |
399 | } | |
400 | ||
401 | return 1; | |
402 | } | |
403 | #endif | |
404 | ||
30aeba43 | 405 | int tls_construct_ctos_etm(SSL *s, WPACKET *pkt, X509 *x, size_t chain, int *al) |
ab83e314 MC |
406 | { |
407 | if (s->options & SSL_OP_NO_ENCRYPT_THEN_MAC) | |
408 | return 1; | |
409 | ||
410 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac) | |
411 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 412 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ETM, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
413 | return 0; |
414 | } | |
415 | ||
416 | return 1; | |
417 | } | |
418 | ||
419 | #ifndef OPENSSL_NO_CT | |
30aeba43 | 420 | int tls_construct_ctos_sct(SSL *s, WPACKET *pkt, X509 *x, size_t chain, int *al) |
ab83e314 MC |
421 | { |
422 | if (s->ct_validation_callback == NULL) | |
423 | return 1; | |
424 | ||
e96e0f8e MC |
425 | /* Not defined for client Certificates */ |
426 | if (x != NULL) | |
427 | return 1; | |
428 | ||
ab83e314 MC |
429 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signed_certificate_timestamp) |
430 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 431 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SCT, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
432 | return 0; |
433 | } | |
434 | ||
435 | return 1; | |
436 | } | |
437 | #endif | |
438 | ||
30aeba43 | 439 | int tls_construct_ctos_ems(SSL *s, WPACKET *pkt, X509 *x, size_t chain, int *al) |
ab83e314 MC |
440 | { |
441 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret) | |
442 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 443 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EMS, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
444 | return 0; |
445 | } | |
446 | ||
447 | return 1; | |
448 | } | |
449 | ||
30aeba43 MC |
450 | int tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt, X509 *x, |
451 | size_t chain, int *al) | |
ab83e314 MC |
452 | { |
453 | int currv, min_version, max_version, reason; | |
454 | ||
455 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_versions) | |
456 | || !WPACKET_start_sub_packet_u16(pkt) | |
457 | || !WPACKET_start_sub_packet_u8(pkt)) { | |
7fe97c07 | 458 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, |
ab83e314 MC |
459 | ERR_R_INTERNAL_ERROR); |
460 | return 0; | |
461 | } | |
462 | ||
463 | reason = ssl_get_client_min_max_version(s, &min_version, &max_version); | |
464 | if (reason != 0) { | |
7fe97c07 | 465 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, reason); |
ab83e314 MC |
466 | return 0; |
467 | } | |
468 | ||
469 | /* | |
470 | * TODO(TLS1.3): There is some discussion on the TLS list as to wheter | |
471 | * we should include versions <TLS1.2. For the moment we do. To be | |
472 | * reviewed later. | |
473 | */ | |
474 | for (currv = max_version; currv >= min_version; currv--) { | |
475 | /* TODO(TLS1.3): Remove this first if clause prior to release!! */ | |
476 | if (currv == TLS1_3_VERSION) { | |
477 | if (!WPACKET_put_bytes_u16(pkt, TLS1_3_VERSION_DRAFT)) { | |
7fe97c07 | 478 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, |
ab83e314 MC |
479 | ERR_R_INTERNAL_ERROR); |
480 | return 0; | |
481 | } | |
482 | } else if (!WPACKET_put_bytes_u16(pkt, currv)) { | |
7fe97c07 | 483 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, |
ab83e314 MC |
484 | ERR_R_INTERNAL_ERROR); |
485 | return 0; | |
486 | } | |
487 | } | |
488 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
7fe97c07 | 489 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, |
ab83e314 MC |
490 | ERR_R_INTERNAL_ERROR); |
491 | return 0; | |
492 | } | |
493 | ||
494 | return 1; | |
495 | } | |
496 | ||
30aeba43 MC |
497 | int tls_construct_ctos_key_share(SSL *s, WPACKET *pkt, X509 *x, size_t chain, |
498 | int *al) | |
ab83e314 | 499 | { |
3cf96e88 | 500 | #ifndef OPENSSL_NO_TLS1_3 |
ab83e314 MC |
501 | size_t i, sharessent = 0, num_curves = 0; |
502 | const unsigned char *pcurves = NULL; | |
503 | ||
504 | /* key_share extension */ | |
505 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
506 | /* Extension data sub-packet */ | |
507 | || !WPACKET_start_sub_packet_u16(pkt) | |
508 | /* KeyShare list sub-packet */ | |
509 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 510 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
511 | return 0; |
512 | } | |
513 | ||
514 | pcurves = s->tlsext_supportedgroupslist; | |
515 | if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) { | |
7fe97c07 | 516 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
517 | return 0; |
518 | } | |
519 | ||
520 | /* | |
521 | * TODO(TLS1.3): Make the number of key_shares sent configurable. For | |
522 | * now, just send one | |
523 | */ | |
524 | for (i = 0; i < num_curves && sharessent < 1; i++, pcurves += 2) { | |
525 | unsigned char *encodedPoint = NULL; | |
526 | unsigned int curve_id = 0; | |
527 | EVP_PKEY *key_share_key = NULL; | |
528 | size_t encodedlen; | |
529 | ||
530 | if (!tls_curve_allowed(s, pcurves, SSL_SECOP_CURVE_SUPPORTED)) | |
531 | continue; | |
532 | ||
533 | if (s->s3->tmp.pkey != NULL) { | |
534 | /* Shouldn't happen! */ | |
7fe97c07 | 535 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
536 | return 0; |
537 | } | |
538 | ||
539 | /* Generate a key for this key_share */ | |
540 | curve_id = (pcurves[0] << 8) | pcurves[1]; | |
541 | key_share_key = ssl_generate_pkey_curve(curve_id); | |
542 | if (key_share_key == NULL) { | |
7fe97c07 | 543 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_EVP_LIB); |
ab83e314 MC |
544 | return 0; |
545 | } | |
546 | ||
547 | /* Encode the public key. */ | |
548 | encodedlen = EVP_PKEY_get1_tls_encodedpoint(key_share_key, | |
549 | &encodedPoint); | |
550 | if (encodedlen == 0) { | |
7fe97c07 | 551 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_EC_LIB); |
ab83e314 MC |
552 | EVP_PKEY_free(key_share_key); |
553 | return 0; | |
554 | } | |
555 | ||
556 | /* Create KeyShareEntry */ | |
557 | if (!WPACKET_put_bytes_u16(pkt, curve_id) | |
558 | || !WPACKET_sub_memcpy_u16(pkt, encodedPoint, encodedlen)) { | |
7fe97c07 | 559 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
560 | EVP_PKEY_free(key_share_key); |
561 | OPENSSL_free(encodedPoint); | |
562 | return 0; | |
563 | } | |
564 | ||
565 | /* | |
566 | * TODO(TLS1.3): When changing to send more than one key_share we're | |
567 | * going to need to be able to save more than one EVP_PKEY. For now | |
568 | * we reuse the existing tmp.pkey | |
569 | */ | |
570 | s->s3->group_id = curve_id; | |
571 | s->s3->tmp.pkey = key_share_key; | |
572 | sharessent++; | |
573 | OPENSSL_free(encodedPoint); | |
574 | } | |
575 | ||
576 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
7fe97c07 | 577 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
578 | return 0; |
579 | } | |
3cf96e88 | 580 | #endif |
ab83e314 MC |
581 | |
582 | return 1; | |
583 | } | |
584 | ||
1266eefd MC |
585 | #define F5_WORKAROUND_MIN_MSG_LEN 0xff |
586 | #define F5_WORKAROUND_MAX_MSG_LEN 0x200 | |
587 | ||
30aeba43 MC |
588 | int tls_construct_ctos_padding(SSL *s, WPACKET *pkt, X509 *x, size_t chain, |
589 | int *al) | |
ab83e314 MC |
590 | { |
591 | unsigned char *padbytes; | |
592 | size_t hlen; | |
593 | ||
594 | if ((s->options & SSL_OP_TLSEXT_PADDING) == 0) | |
595 | return 1; | |
596 | ||
597 | /* | |
598 | * Add padding to workaround bugs in F5 terminators. See | |
599 | * https://tools.ietf.org/html/draft-agl-tls-padding-03 NB: because this | |
1266eefd | 600 | * code calculates the length of all existing extensions it MUST always |
ab83e314 MC |
601 | * appear last. |
602 | */ | |
603 | if (!WPACKET_get_total_written(pkt, &hlen)) { | |
7fe97c07 | 604 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
605 | return 0; |
606 | } | |
607 | ||
1266eefd MC |
608 | if (hlen > F5_WORKAROUND_MIN_MSG_LEN && hlen < F5_WORKAROUND_MAX_MSG_LEN) { |
609 | /* Calculate the amond of padding we need to add */ | |
610 | hlen = F5_WORKAROUND_MAX_MSG_LEN - hlen; | |
611 | ||
612 | /* | |
613 | * Take off the size of extension header itself (2 bytes for type and | |
614 | * 2 bytes for length bytes) | |
615 | */ | |
ab83e314 MC |
616 | if (hlen >= 4) |
617 | hlen -= 4; | |
618 | else | |
619 | hlen = 0; | |
620 | ||
621 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_padding) | |
622 | || !WPACKET_sub_allocate_bytes_u16(pkt, hlen, &padbytes)) { | |
7fe97c07 | 623 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
624 | return 0; |
625 | } | |
626 | memset(padbytes, 0, hlen); | |
627 | } | |
628 | ||
629 | return 1; | |
630 | } | |
631 | ||
6dd083fd MC |
632 | /* |
633 | * Parse the server's renegotiation binding and abort if it's not right | |
634 | */ | |
f97d4c37 MC |
635 | int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, X509 *x, size_t chain, |
636 | int *al) | |
6dd083fd MC |
637 | { |
638 | size_t expected_len = s->s3->previous_client_finished_len | |
639 | + s->s3->previous_server_finished_len; | |
640 | size_t ilen; | |
641 | const unsigned char *data; | |
642 | ||
643 | /* Check for logic errors */ | |
644 | assert(expected_len == 0 || s->s3->previous_client_finished_len != 0); | |
645 | assert(expected_len == 0 || s->s3->previous_server_finished_len != 0); | |
646 | ||
647 | /* Parse the length byte */ | |
648 | if (!PACKET_get_1_len(pkt, &ilen)) { | |
7fe97c07 | 649 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
650 | SSL_R_RENEGOTIATION_ENCODING_ERR); |
651 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
652 | return 0; | |
653 | } | |
654 | ||
655 | /* Consistency check */ | |
656 | if (PACKET_remaining(pkt) != ilen) { | |
7fe97c07 | 657 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
658 | SSL_R_RENEGOTIATION_ENCODING_ERR); |
659 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
660 | return 0; | |
661 | } | |
662 | ||
663 | /* Check that the extension matches */ | |
664 | if (ilen != expected_len) { | |
7fe97c07 | 665 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
666 | SSL_R_RENEGOTIATION_MISMATCH); |
667 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
668 | return 0; | |
669 | } | |
670 | ||
671 | if (!PACKET_get_bytes(pkt, &data, s->s3->previous_client_finished_len) | |
672 | || memcmp(data, s->s3->previous_client_finished, | |
673 | s->s3->previous_client_finished_len) != 0) { | |
7fe97c07 | 674 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
675 | SSL_R_RENEGOTIATION_MISMATCH); |
676 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
677 | return 0; | |
678 | } | |
679 | ||
680 | if (!PACKET_get_bytes(pkt, &data, s->s3->previous_server_finished_len) | |
681 | || memcmp(data, s->s3->previous_server_finished, | |
682 | s->s3->previous_server_finished_len) != 0) { | |
7fe97c07 | 683 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
684 | SSL_R_RENEGOTIATION_MISMATCH); |
685 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
686 | return 0; | |
687 | } | |
688 | s->s3->send_connection_binding = 1; | |
689 | ||
690 | return 1; | |
691 | } | |
692 | ||
f97d4c37 MC |
693 | int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, X509 *x, size_t chain, |
694 | int *al) | |
6dd083fd MC |
695 | { |
696 | if (s->tlsext_hostname == NULL || PACKET_remaining(pkt) > 0) { | |
697 | *al = SSL_AD_UNRECOGNIZED_NAME; | |
698 | return 0; | |
699 | } | |
700 | ||
701 | if (!s->hit) { | |
702 | if (s->session->tlsext_hostname != NULL) { | |
703 | *al = SSL_AD_INTERNAL_ERROR; | |
704 | return 0; | |
705 | } | |
706 | s->session->tlsext_hostname = OPENSSL_strdup(s->tlsext_hostname); | |
707 | if (s->session->tlsext_hostname == NULL) { | |
708 | *al = SSL_AD_INTERNAL_ERROR; | |
709 | return 0; | |
710 | } | |
711 | } | |
712 | ||
713 | return 1; | |
714 | } | |
715 | ||
716 | #ifndef OPENSSL_NO_EC | |
f97d4c37 MC |
717 | int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, X509 *x, size_t chain, |
718 | int *al) | |
6dd083fd MC |
719 | { |
720 | unsigned int ecpointformatlist_length; | |
721 | PACKET ecptformatlist; | |
722 | ||
723 | if (!PACKET_as_length_prefixed_1(pkt, &ecptformatlist)) { | |
724 | *al = SSL_AD_DECODE_ERROR; | |
725 | return 0; | |
726 | } | |
727 | if (!s->hit) { | |
728 | ecpointformatlist_length = PACKET_remaining(&ecptformatlist); | |
729 | s->session->tlsext_ecpointformatlist_length = 0; | |
730 | ||
731 | OPENSSL_free(s->session->tlsext_ecpointformatlist); | |
732 | s->session->tlsext_ecpointformatlist = | |
733 | OPENSSL_malloc(ecpointformatlist_length); | |
734 | if (s->session->tlsext_ecpointformatlist == NULL) { | |
735 | *al = SSL_AD_INTERNAL_ERROR; | |
736 | return 0; | |
737 | } | |
738 | ||
739 | s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length; | |
740 | ||
741 | if (!PACKET_copy_bytes(&ecptformatlist, | |
742 | s->session->tlsext_ecpointformatlist, | |
743 | ecpointformatlist_length)) { | |
744 | *al = SSL_AD_INTERNAL_ERROR; | |
745 | return 0; | |
746 | } | |
747 | } | |
748 | ||
749 | return 1; | |
750 | } | |
751 | #endif | |
752 | ||
f97d4c37 MC |
753 | int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, X509 *x, size_t chain, |
754 | int *al) | |
6dd083fd | 755 | { |
1266eefd | 756 | if (s->tls_session_ticket_ext_cb != NULL && |
6dd083fd MC |
757 | !s->tls_session_ticket_ext_cb(s, PACKET_data(pkt), |
758 | PACKET_remaining(pkt), | |
759 | s->tls_session_ticket_ext_cb_arg)) { | |
760 | *al = SSL_AD_INTERNAL_ERROR; | |
761 | return 0; | |
762 | } | |
1266eefd | 763 | |
6dd083fd MC |
764 | if (!tls_use_ticket(s) || PACKET_remaining(pkt) > 0) { |
765 | *al = SSL_AD_UNSUPPORTED_EXTENSION; | |
766 | return 0; | |
767 | } | |
1266eefd | 768 | |
6dd083fd MC |
769 | s->tlsext_ticket_expected = 1; |
770 | ||
771 | return 1; | |
772 | } | |
773 | ||
ab83e314 | 774 | #ifndef OPENSSL_NO_OCSP |
f97d4c37 MC |
775 | int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, X509 *x, size_t chain, |
776 | int *al) | |
6dd083fd MC |
777 | { |
778 | /* | |
779 | * MUST be empty and only sent if we've requested a status | |
780 | * request message. | |
781 | */ | |
cbb09544 MC |
782 | if (s->tlsext_status_type == TLSEXT_STATUSTYPE_nothing |
783 | || PACKET_remaining(pkt) > 0) { | |
6dd083fd MC |
784 | *al = SSL_AD_UNSUPPORTED_EXTENSION; |
785 | return 0; | |
786 | } | |
787 | /* Set flag to expect CertificateStatus message */ | |
788 | s->tlsext_status_expected = 1; | |
789 | ||
790 | return 1; | |
791 | } | |
ab83e314 | 792 | #endif |
6dd083fd MC |
793 | |
794 | ||
795 | #ifndef OPENSSL_NO_CT | |
f97d4c37 | 796 | int tls_parse_stoc_sct(SSL *s, PACKET *pkt, X509 *x, size_t chain, int *al) |
6dd083fd MC |
797 | { |
798 | /* | |
799 | * Only take it if we asked for it - i.e if there is no CT validation | |
800 | * callback set, then a custom extension MAY be processing it, so we | |
801 | * need to let control continue to flow to that. | |
802 | */ | |
803 | if (s->ct_validation_callback != NULL) { | |
804 | size_t size = PACKET_remaining(pkt); | |
805 | ||
806 | /* Simply copy it off for later processing */ | |
1266eefd MC |
807 | OPENSSL_free(s->tlsext_scts); |
808 | s->tlsext_scts = NULL; | |
809 | ||
6dd083fd MC |
810 | s->tlsext_scts_len = size; |
811 | if (size > 0) { | |
812 | s->tlsext_scts = OPENSSL_malloc(size); | |
813 | if (s->tlsext_scts == NULL | |
814 | || !PACKET_copy_bytes(pkt, s->tlsext_scts, size)) { | |
815 | *al = SSL_AD_INTERNAL_ERROR; | |
816 | return 0; | |
817 | } | |
818 | } | |
819 | } else { | |
820 | if (custom_ext_parse(s, 0, TLSEXT_TYPE_signed_certificate_timestamp, | |
821 | PACKET_data(pkt), PACKET_remaining(pkt), al) <= 0) | |
822 | return 0; | |
823 | } | |
824 | ||
825 | return 1; | |
826 | } | |
827 | #endif | |
828 | ||
829 | ||
830 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
831 | /* | |
832 | * ssl_next_proto_validate validates a Next Protocol Negotiation block. No | |
833 | * elements of zero length are allowed and the set of elements must exactly | |
834 | * fill the length of the block. Returns 1 on success or 0 on failure. | |
835 | */ | |
836 | static int ssl_next_proto_validate(PACKET *pkt) | |
837 | { | |
838 | PACKET tmp_protocol; | |
839 | ||
840 | while (PACKET_remaining(pkt)) { | |
841 | if (!PACKET_get_length_prefixed_1(pkt, &tmp_protocol) | |
842 | || PACKET_remaining(&tmp_protocol) == 0) | |
843 | return 0; | |
844 | } | |
845 | ||
846 | return 1; | |
847 | } | |
848 | ||
f97d4c37 | 849 | int tls_parse_stoc_npn(SSL *s, PACKET *pkt, X509 *x, size_t chain, int *al) |
6dd083fd MC |
850 | { |
851 | unsigned char *selected; | |
852 | unsigned char selected_len; | |
853 | PACKET tmppkt; | |
854 | ||
1266eefd | 855 | /* Check if we are in a renegotiation. If so ignore this extension */ |
6dd083fd MC |
856 | if (s->s3->tmp.finish_md_len != 0) |
857 | return 1; | |
858 | ||
859 | /* We must have requested it. */ | |
860 | if (s->ctx->next_proto_select_cb == NULL) { | |
861 | *al = SSL_AD_UNSUPPORTED_EXTENSION; | |
862 | return 0; | |
863 | } | |
1266eefd | 864 | |
6dd083fd MC |
865 | /* The data must be valid */ |
866 | tmppkt = *pkt; | |
867 | if (!ssl_next_proto_validate(&tmppkt)) { | |
868 | *al = SSL_AD_DECODE_ERROR; | |
869 | return 0; | |
870 | } | |
871 | if (s->ctx->next_proto_select_cb(s, &selected, &selected_len, | |
872 | PACKET_data(pkt), | |
873 | PACKET_remaining(pkt), | |
874 | s->ctx->next_proto_select_cb_arg) != | |
875 | SSL_TLSEXT_ERR_OK) { | |
876 | *al = SSL_AD_INTERNAL_ERROR; | |
877 | return 0; | |
878 | } | |
1266eefd | 879 | |
6dd083fd MC |
880 | /* |
881 | * Could be non-NULL if server has sent multiple NPN extensions in | |
882 | * a single Serverhello | |
883 | */ | |
884 | OPENSSL_free(s->next_proto_negotiated); | |
885 | s->next_proto_negotiated = OPENSSL_malloc(selected_len); | |
886 | if (s->next_proto_negotiated == NULL) { | |
887 | *al = SSL_AD_INTERNAL_ERROR; | |
888 | return 0; | |
889 | } | |
890 | ||
891 | memcpy(s->next_proto_negotiated, selected, selected_len); | |
892 | s->next_proto_negotiated_len = selected_len; | |
893 | s->s3->next_proto_neg_seen = 1; | |
894 | ||
895 | return 1; | |
896 | } | |
897 | #endif | |
898 | ||
f97d4c37 | 899 | int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, X509 *x, size_t chain, int *al) |
6dd083fd MC |
900 | { |
901 | size_t len; | |
902 | ||
903 | /* We must have requested it. */ | |
904 | if (!s->s3->alpn_sent) { | |
905 | *al = SSL_AD_UNSUPPORTED_EXTENSION; | |
906 | return 0; | |
907 | } | |
908 | /*- | |
909 | * The extension data consists of: | |
910 | * uint16 list_length | |
911 | * uint8 proto_length; | |
912 | * uint8 proto[proto_length]; | |
913 | */ | |
914 | if (!PACKET_get_net_2_len(pkt, &len) | |
915 | || PACKET_remaining(pkt) != len || !PACKET_get_1_len(pkt, &len) | |
916 | || PACKET_remaining(pkt) != len) { | |
917 | *al = SSL_AD_DECODE_ERROR; | |
918 | return 0; | |
919 | } | |
920 | OPENSSL_free(s->s3->alpn_selected); | |
921 | s->s3->alpn_selected = OPENSSL_malloc(len); | |
922 | if (s->s3->alpn_selected == NULL) { | |
923 | *al = SSL_AD_INTERNAL_ERROR; | |
924 | return 0; | |
925 | } | |
926 | if (!PACKET_copy_bytes(pkt, s->s3->alpn_selected, len)) { | |
927 | *al = SSL_AD_DECODE_ERROR; | |
928 | return 0; | |
929 | } | |
930 | s->s3->alpn_selected_len = len; | |
931 | ||
932 | return 1; | |
933 | } | |
934 | ||
935 | #ifndef OPENSSL_NO_SRTP | |
f97d4c37 | 936 | int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, X509 *x, size_t chain, int *al) |
6dd083fd MC |
937 | { |
938 | unsigned int id, ct, mki; | |
939 | int i; | |
940 | STACK_OF(SRTP_PROTECTION_PROFILE) *clnt; | |
941 | SRTP_PROTECTION_PROFILE *prof; | |
942 | ||
1266eefd MC |
943 | if (!PACKET_get_net_2(pkt, &ct) || ct != 2 |
944 | || !PACKET_get_net_2(pkt, &id) | |
945 | || !PACKET_get_1(pkt, &mki) | |
946 | || PACKET_remaining(pkt) != 0) { | |
7fe97c07 | 947 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, |
6dd083fd MC |
948 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
949 | *al = SSL_AD_DECODE_ERROR; | |
950 | return 0; | |
951 | } | |
952 | ||
953 | if (mki != 0) { | |
954 | /* Must be no MKI, since we never offer one */ | |
7fe97c07 | 955 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, SSL_R_BAD_SRTP_MKI_VALUE); |
6dd083fd MC |
956 | *al = SSL_AD_ILLEGAL_PARAMETER; |
957 | return 0; | |
958 | } | |
959 | ||
6dd083fd | 960 | /* Throw an error if the server gave us an unsolicited extension */ |
1266eefd | 961 | clnt = SSL_get_srtp_profiles(s); |
6dd083fd | 962 | if (clnt == NULL) { |
7fe97c07 | 963 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, SSL_R_NO_SRTP_PROFILES); |
6dd083fd MC |
964 | *al = SSL_AD_DECODE_ERROR; |
965 | return 0; | |
966 | } | |
967 | ||
968 | /* | |
969 | * Check to see if the server gave us something we support (and | |
970 | * presumably offered) | |
971 | */ | |
972 | for (i = 0; i < sk_SRTP_PROTECTION_PROFILE_num(clnt); i++) { | |
973 | prof = sk_SRTP_PROTECTION_PROFILE_value(clnt, i); | |
974 | ||
975 | if (prof->id == id) { | |
976 | s->srtp_profile = prof; | |
977 | *al = 0; | |
978 | return 1; | |
979 | } | |
980 | } | |
981 | ||
7fe97c07 | 982 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, |
6dd083fd MC |
983 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
984 | *al = SSL_AD_DECODE_ERROR; | |
985 | return 0; | |
986 | } | |
987 | #endif | |
988 | ||
f97d4c37 | 989 | int tls_parse_stoc_etm(SSL *s, PACKET *pkt, X509 *x, size_t chain, int *al) |
6dd083fd MC |
990 | { |
991 | /* Ignore if inappropriate ciphersuite */ | |
992 | if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC) | |
993 | && s->s3->tmp.new_cipher->algorithm_mac != SSL_AEAD | |
994 | && s->s3->tmp.new_cipher->algorithm_enc != SSL_RC4) | |
995 | s->s3->flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC; | |
996 | ||
997 | return 1; | |
998 | } | |
999 | ||
f97d4c37 | 1000 | int tls_parse_stoc_ems(SSL *s, PACKET *pkt, X509 *x, size_t chain, int *al) |
6dd083fd MC |
1001 | { |
1002 | s->s3->flags |= TLS1_FLAGS_RECEIVED_EXTMS; | |
1003 | if (!s->hit) | |
1004 | s->session->flags |= SSL_SESS_FLAG_EXTMS; | |
1005 | ||
1006 | return 1; | |
1007 | } | |
1008 | ||
f97d4c37 MC |
1009 | int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, X509 *x, size_t chain, |
1010 | int *al) | |
6dd083fd | 1011 | { |
3cf96e88 | 1012 | #ifndef OPENSSL_NO_TLS1_3 |
6dd083fd MC |
1013 | unsigned int group_id; |
1014 | PACKET encoded_pt; | |
1015 | EVP_PKEY *ckey = s->s3->tmp.pkey, *skey = NULL; | |
1016 | ||
1017 | /* Sanity check */ | |
1018 | if (ckey == NULL) { | |
1019 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 1020 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1021 | return 0; |
1022 | } | |
1023 | ||
1024 | if (!PACKET_get_net_2(pkt, &group_id)) { | |
1025 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
7fe97c07 | 1026 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_LENGTH_MISMATCH); |
6dd083fd MC |
1027 | return 0; |
1028 | } | |
1029 | ||
1030 | if (group_id != s->s3->group_id) { | |
1031 | /* | |
1032 | * This isn't for the group that we sent in the original | |
1033 | * key_share! | |
1034 | */ | |
1035 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
7fe97c07 | 1036 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE); |
6dd083fd MC |
1037 | return 0; |
1038 | } | |
1039 | ||
1040 | if (!PACKET_as_length_prefixed_2(pkt, &encoded_pt) | |
1041 | || PACKET_remaining(&encoded_pt) == 0) { | |
1042 | *al = SSL_AD_DECODE_ERROR; | |
7fe97c07 | 1043 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_LENGTH_MISMATCH); |
6dd083fd MC |
1044 | return 0; |
1045 | } | |
1046 | ||
1047 | skey = ssl_generate_pkey(ckey); | |
1048 | if (skey == NULL) { | |
1049 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 1050 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_MALLOC_FAILURE); |
6dd083fd MC |
1051 | return 0; |
1052 | } | |
1053 | if (!EVP_PKEY_set1_tls_encodedpoint(skey, PACKET_data(&encoded_pt), | |
1054 | PACKET_remaining(&encoded_pt))) { | |
1055 | *al = SSL_AD_DECODE_ERROR; | |
7fe97c07 | 1056 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_ECPOINT); |
a1d6a0b6 | 1057 | EVP_PKEY_free(skey); |
6dd083fd MC |
1058 | return 0; |
1059 | } | |
1060 | ||
1061 | if (ssl_derive(s, ckey, skey, 1) == 0) { | |
1062 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 1063 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1064 | EVP_PKEY_free(skey); |
1065 | return 0; | |
1066 | } | |
1067 | EVP_PKEY_free(skey); | |
3cf96e88 | 1068 | #endif |
6dd083fd MC |
1069 | |
1070 | return 1; | |
1071 | } |