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