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6dd083fd MC |
1 | /* |
2 | * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved. | |
3 | * | |
4 | * Licensed under the OpenSSL license (the "License"). You may not use | |
5 | * this file except in compliance with the License. You can obtain a copy | |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
8 | */ | |
9 | ||
10 | #include <assert.h> | |
ab83e314 | 11 | #include <openssl/ocsp.h> |
6dd083fd MC |
12 | #include "../ssl_locl.h" |
13 | #include "statem_locl.h" | |
14 | ||
8521ced6 MC |
15 | int tls_construct_ctos_renegotiate(SSL *s, WPACKET *pkt, X509 *x, |
16 | size_t chainidx, int *al) | |
ab83e314 MC |
17 | { |
18 | /* Add RI if renegotiating */ | |
19 | if (!s->renegotiate) | |
20 | return 1; | |
21 | ||
22 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_renegotiate) | |
23 | || !WPACKET_start_sub_packet_u16(pkt) | |
24 | || !WPACKET_sub_memcpy_u8(pkt, s->s3->previous_client_finished, | |
25 | s->s3->previous_client_finished_len) | |
26 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 27 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_RENEGOTIATE, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
28 | return 0; |
29 | } | |
30 | ||
31 | return 1; | |
32 | } | |
33 | ||
8521ced6 MC |
34 | int tls_construct_ctos_server_name(SSL *s, WPACKET *pkt, X509 *x, |
35 | size_t chainidx, int *al) | |
ab83e314 | 36 | { |
aff8c126 | 37 | if (s->ext.hostname == NULL) |
ab83e314 MC |
38 | return 1; |
39 | ||
40 | /* Add TLS extension servername to the Client Hello message */ | |
41 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_server_name) | |
42 | /* Sub-packet for server_name extension */ | |
43 | || !WPACKET_start_sub_packet_u16(pkt) | |
44 | /* Sub-packet for servername list (always 1 hostname)*/ | |
45 | || !WPACKET_start_sub_packet_u16(pkt) | |
46 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_NAMETYPE_host_name) | |
aff8c126 RS |
47 | || !WPACKET_sub_memcpy_u16(pkt, s->ext.hostname, |
48 | strlen(s->ext.hostname)) | |
ab83e314 MC |
49 | || !WPACKET_close(pkt) |
50 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 51 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SERVER_NAME, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
52 | return 0; |
53 | } | |
54 | ||
55 | return 1; | |
56 | } | |
57 | ||
58 | #ifndef OPENSSL_NO_SRP | |
8521ced6 MC |
59 | int tls_construct_ctos_srp(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx, |
60 | int *al) | |
ab83e314 MC |
61 | { |
62 | /* Add SRP username if there is one */ | |
63 | if (s->srp_ctx.login == NULL) | |
64 | return 1; | |
65 | ||
66 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_srp) | |
67 | /* Sub-packet for SRP extension */ | |
68 | || !WPACKET_start_sub_packet_u16(pkt) | |
69 | || !WPACKET_start_sub_packet_u8(pkt) | |
70 | /* login must not be zero...internal error if so */ | |
71 | || !WPACKET_set_flags(pkt, WPACKET_FLAGS_NON_ZERO_LENGTH) | |
72 | || !WPACKET_memcpy(pkt, s->srp_ctx.login, | |
73 | strlen(s->srp_ctx.login)) | |
74 | || !WPACKET_close(pkt) | |
75 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 76 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SRP, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
77 | return 0; |
78 | } | |
79 | ||
80 | return 1; | |
81 | } | |
82 | #endif | |
83 | ||
84 | #ifndef OPENSSL_NO_EC | |
85 | static int use_ecc(SSL *s) | |
86 | { | |
1266eefd | 87 | int i, end; |
ab83e314 MC |
88 | unsigned long alg_k, alg_a; |
89 | STACK_OF(SSL_CIPHER) *cipher_stack = NULL; | |
90 | ||
91 | /* See if we support any ECC ciphersuites */ | |
92 | if (s->version == SSL3_VERSION) | |
93 | return 0; | |
94 | ||
ab83e314 | 95 | cipher_stack = SSL_get_ciphers(s); |
1266eefd MC |
96 | end = sk_SSL_CIPHER_num(cipher_stack); |
97 | for (i = 0; i < end; i++) { | |
ab83e314 MC |
98 | const SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i); |
99 | ||
100 | alg_k = c->algorithm_mkey; | |
101 | alg_a = c->algorithm_auth; | |
102 | if ((alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) | |
1266eefd MC |
103 | || (alg_a & SSL_aECDSA) |
104 | || c->min_tls >= TLS1_3_VERSION) | |
ab83e314 | 105 | break; |
ab83e314 MC |
106 | } |
107 | ||
1266eefd | 108 | return i < end; |
ab83e314 MC |
109 | } |
110 | ||
30aeba43 | 111 | int tls_construct_ctos_ec_pt_formats(SSL *s, WPACKET *pkt, X509 *x, |
8521ced6 | 112 | size_t chainidx, int *al) |
ab83e314 MC |
113 | { |
114 | const unsigned char *pformats; | |
115 | size_t num_formats; | |
116 | ||
117 | if (!use_ecc(s)) | |
118 | return 1; | |
119 | ||
120 | /* Add TLS extension ECPointFormats to the ClientHello message */ | |
ab83e314 MC |
121 | tls1_get_formatlist(s, &pformats, &num_formats); |
122 | ||
123 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_ec_point_formats) | |
124 | /* Sub-packet for formats extension */ | |
125 | || !WPACKET_start_sub_packet_u16(pkt) | |
126 | || !WPACKET_sub_memcpy_u8(pkt, pformats, num_formats) | |
127 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 128 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
129 | return 0; |
130 | } | |
131 | ||
132 | return 1; | |
133 | } | |
134 | ||
30aeba43 | 135 | int tls_construct_ctos_supported_groups(SSL *s, WPACKET *pkt, X509 *x, |
8521ced6 | 136 | size_t chainidx, int *al) |
ab83e314 MC |
137 | { |
138 | const unsigned char *pcurves = NULL, *pcurvestmp; | |
139 | size_t num_curves = 0, i; | |
140 | ||
141 | if (!use_ecc(s)) | |
142 | return 1; | |
143 | ||
144 | /* | |
145 | * Add TLS extension supported_groups to the ClientHello message | |
146 | */ | |
147 | /* TODO(TLS1.3): Add support for DHE groups */ | |
aff8c126 | 148 | pcurves = s->ext.supportedgroups; |
ab83e314 | 149 | if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) { |
7fe97c07 | 150 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, |
ab83e314 MC |
151 | ERR_R_INTERNAL_ERROR); |
152 | return 0; | |
153 | } | |
154 | pcurvestmp = pcurves; | |
155 | ||
156 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_groups) | |
157 | /* Sub-packet for supported_groups extension */ | |
158 | || !WPACKET_start_sub_packet_u16(pkt) | |
159 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 160 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, |
ab83e314 MC |
161 | ERR_R_INTERNAL_ERROR); |
162 | return 0; | |
163 | } | |
164 | /* Copy curve ID if supported */ | |
165 | for (i = 0; i < num_curves; i++, pcurvestmp += 2) { | |
166 | if (tls_curve_allowed(s, pcurves, SSL_SECOP_CURVE_SUPPORTED)) { | |
167 | if (!WPACKET_put_bytes_u8(pkt, pcurvestmp[0]) | |
168 | || !WPACKET_put_bytes_u8(pkt, pcurvestmp[1])) { | |
7fe97c07 | 169 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, |
ab83e314 MC |
170 | ERR_R_INTERNAL_ERROR); |
171 | return 0; | |
172 | } | |
173 | } | |
174 | } | |
175 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
7fe97c07 | 176 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, |
ab83e314 MC |
177 | ERR_R_INTERNAL_ERROR); |
178 | return 0; | |
179 | } | |
180 | ||
181 | return 1; | |
182 | } | |
183 | #endif | |
184 | ||
30aeba43 | 185 | int tls_construct_ctos_session_ticket(SSL *s, WPACKET *pkt, X509 *x, |
8521ced6 | 186 | size_t chainidx, int *al) |
ab83e314 MC |
187 | { |
188 | size_t ticklen; | |
189 | ||
190 | if (!tls_use_ticket(s)) | |
191 | return 1; | |
192 | ||
193 | if (!s->new_session && s->session != NULL | |
aff8c126 RS |
194 | && s->session->ext.tick != NULL) { |
195 | ticklen = s->session->ext.ticklen; | |
196 | } else if (s->session && s->ext.session_ticket != NULL | |
197 | && s->ext.session_ticket->data != NULL) { | |
198 | ticklen = s->ext.session_ticket->length; | |
199 | s->session->ext.tick = OPENSSL_malloc(ticklen); | |
200 | if (s->session->ext.tick == NULL) { | |
7fe97c07 | 201 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET, |
ab83e314 MC |
202 | ERR_R_INTERNAL_ERROR); |
203 | return 0; | |
204 | } | |
aff8c126 RS |
205 | memcpy(s->session->ext.tick, |
206 | s->ext.session_ticket->data, ticklen); | |
207 | s->session->ext.ticklen = ticklen; | |
ab83e314 MC |
208 | } else { |
209 | ticklen = 0; | |
210 | } | |
211 | ||
aff8c126 RS |
212 | if (ticklen == 0 && s->ext.session_ticket != NULL && |
213 | s->ext.session_ticket->data == NULL) | |
ab83e314 MC |
214 | return 1; |
215 | ||
216 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket) | |
aff8c126 | 217 | || !WPACKET_sub_memcpy_u16(pkt, s->session->ext.tick, ticklen)) { |
7fe97c07 | 218 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
219 | return 0; |
220 | } | |
221 | ||
222 | return 1; | |
223 | } | |
224 | ||
8521ced6 | 225 | int tls_construct_ctos_sig_algs(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx, |
30aeba43 | 226 | int *al) |
ab83e314 MC |
227 | { |
228 | size_t salglen; | |
703bcee0 | 229 | const unsigned int *salg; |
ab83e314 MC |
230 | |
231 | if (!SSL_CLIENT_USE_SIGALGS(s)) | |
232 | return 1; | |
233 | ||
a9669ddc | 234 | salglen = tls12_get_psigalgs(s, 1, &salg); |
ab83e314 MC |
235 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signature_algorithms) |
236 | /* Sub-packet for sig-algs extension */ | |
237 | || !WPACKET_start_sub_packet_u16(pkt) | |
238 | /* Sub-packet for the actual list */ | |
239 | || !WPACKET_start_sub_packet_u16(pkt) | |
240 | || !tls12_copy_sigalgs(s, pkt, salg, salglen) | |
241 | || !WPACKET_close(pkt) | |
242 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 243 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SIG_ALGS, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
244 | return 0; |
245 | } | |
246 | ||
247 | return 1; | |
248 | } | |
249 | ||
250 | #ifndef OPENSSL_NO_OCSP | |
30aeba43 | 251 | int tls_construct_ctos_status_request(SSL *s, WPACKET *pkt, X509 *x, |
8521ced6 | 252 | size_t chainidx, int *al) |
ab83e314 MC |
253 | { |
254 | int i; | |
255 | ||
e96e0f8e MC |
256 | /* This extension isn't defined for client Certificates */ |
257 | if (x != NULL) | |
258 | return 1; | |
259 | ||
aff8c126 | 260 | if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) |
ab83e314 MC |
261 | return 1; |
262 | ||
263 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request) | |
264 | /* Sub-packet for status request extension */ | |
265 | || !WPACKET_start_sub_packet_u16(pkt) | |
266 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_STATUSTYPE_ocsp) | |
267 | /* Sub-packet for the ids */ | |
268 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 269 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
270 | return 0; |
271 | } | |
aff8c126 | 272 | for (i = 0; i < sk_OCSP_RESPID_num(s->ext.ocsp.ids); i++) { |
ab83e314 | 273 | unsigned char *idbytes; |
aff8c126 | 274 | OCSP_RESPID *id = sk_OCSP_RESPID_value(s->ext.ocsp.ids, i); |
1266eefd | 275 | int idlen = i2d_OCSP_RESPID(id, NULL); |
ab83e314 | 276 | |
ab83e314 MC |
277 | if (idlen <= 0 |
278 | /* Sub-packet for an individual id */ | |
279 | || !WPACKET_sub_allocate_bytes_u16(pkt, idlen, &idbytes) | |
280 | || i2d_OCSP_RESPID(id, &idbytes) != idlen) { | |
7fe97c07 | 281 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, |
ab83e314 MC |
282 | ERR_R_INTERNAL_ERROR); |
283 | return 0; | |
284 | } | |
285 | } | |
286 | if (!WPACKET_close(pkt) | |
287 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 288 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
289 | return 0; |
290 | } | |
aff8c126 | 291 | if (s->ext.ocsp.exts) { |
ab83e314 | 292 | unsigned char *extbytes; |
aff8c126 | 293 | int extlen = i2d_X509_EXTENSIONS(s->ext.ocsp.exts, NULL); |
ab83e314 MC |
294 | |
295 | if (extlen < 0) { | |
7fe97c07 | 296 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, |
ab83e314 MC |
297 | ERR_R_INTERNAL_ERROR); |
298 | return 0; | |
299 | } | |
300 | if (!WPACKET_allocate_bytes(pkt, extlen, &extbytes) | |
aff8c126 | 301 | || i2d_X509_EXTENSIONS(s->ext.ocsp.exts, &extbytes) |
ab83e314 | 302 | != extlen) { |
7fe97c07 | 303 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, |
ab83e314 MC |
304 | ERR_R_INTERNAL_ERROR); |
305 | return 0; | |
306 | } | |
307 | } | |
308 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
7fe97c07 | 309 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
310 | return 0; |
311 | } | |
312 | ||
313 | return 1; | |
314 | } | |
315 | #endif | |
316 | ||
317 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
8521ced6 MC |
318 | int tls_construct_ctos_npn(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx, |
319 | int *al) | |
ab83e314 | 320 | { |
c7f47786 | 321 | if (s->ctx->ext.npn_select_cb == NULL || !SSL_IS_FIRST_HANDSHAKE(s)) |
ab83e314 MC |
322 | return 1; |
323 | ||
324 | /* | |
325 | * The client advertises an empty extension to indicate its support | |
326 | * for Next Protocol Negotiation | |
327 | */ | |
328 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_next_proto_neg) | |
329 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 330 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_NPN, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
331 | return 0; |
332 | } | |
333 | ||
334 | return 1; | |
335 | } | |
336 | #endif | |
337 | ||
8521ced6 | 338 | int tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx, |
30aeba43 | 339 | int *al) |
ab83e314 MC |
340 | { |
341 | s->s3->alpn_sent = 0; | |
342 | ||
c7f47786 | 343 | if (s->ext.alpn == NULL || !SSL_IS_FIRST_HANDSHAKE(s)) |
ab83e314 MC |
344 | return 1; |
345 | ||
346 | if (!WPACKET_put_bytes_u16(pkt, | |
347 | TLSEXT_TYPE_application_layer_protocol_negotiation) | |
348 | /* Sub-packet ALPN extension */ | |
349 | || !WPACKET_start_sub_packet_u16(pkt) | |
aff8c126 | 350 | || !WPACKET_sub_memcpy_u16(pkt, s->ext.alpn, s->ext.alpn_len) |
ab83e314 | 351 | || !WPACKET_close(pkt)) { |
7fe97c07 | 352 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ALPN, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
353 | return 0; |
354 | } | |
355 | s->s3->alpn_sent = 1; | |
356 | ||
357 | return 1; | |
358 | } | |
359 | ||
360 | ||
361 | #ifndef OPENSSL_NO_SRTP | |
8521ced6 | 362 | int tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx, |
30aeba43 | 363 | int *al) |
ab83e314 MC |
364 | { |
365 | STACK_OF(SRTP_PROTECTION_PROFILE) *clnt = SSL_get_srtp_profiles(s); | |
1266eefd | 366 | int i, end; |
ab83e314 MC |
367 | |
368 | if (clnt == NULL) | |
369 | return 1; | |
370 | ||
371 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp) | |
372 | /* Sub-packet for SRTP extension */ | |
373 | || !WPACKET_start_sub_packet_u16(pkt) | |
374 | /* Sub-packet for the protection profile list */ | |
375 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 376 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
377 | return 0; |
378 | } | |
1266eefd MC |
379 | |
380 | end = sk_SRTP_PROTECTION_PROFILE_num(clnt); | |
381 | for (i = 0; i < end; i++) { | |
382 | const SRTP_PROTECTION_PROFILE *prof = | |
383 | sk_SRTP_PROTECTION_PROFILE_value(clnt, i); | |
384 | ||
ab83e314 | 385 | if (prof == NULL || !WPACKET_put_bytes_u16(pkt, prof->id)) { |
7fe97c07 | 386 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
387 | return 0; |
388 | } | |
389 | } | |
390 | if (!WPACKET_close(pkt) | |
391 | /* Add an empty use_mki value */ | |
392 | || !WPACKET_put_bytes_u8(pkt, 0) | |
393 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 394 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
395 | return 0; |
396 | } | |
397 | ||
398 | return 1; | |
399 | } | |
400 | #endif | |
401 | ||
8521ced6 MC |
402 | int tls_construct_ctos_etm(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx, |
403 | int *al) | |
ab83e314 MC |
404 | { |
405 | if (s->options & SSL_OP_NO_ENCRYPT_THEN_MAC) | |
406 | return 1; | |
407 | ||
408 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac) | |
409 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 410 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ETM, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
411 | return 0; |
412 | } | |
413 | ||
414 | return 1; | |
415 | } | |
416 | ||
417 | #ifndef OPENSSL_NO_CT | |
8521ced6 MC |
418 | int tls_construct_ctos_sct(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx, |
419 | int *al) | |
ab83e314 MC |
420 | { |
421 | if (s->ct_validation_callback == NULL) | |
422 | return 1; | |
423 | ||
e96e0f8e MC |
424 | /* Not defined for client Certificates */ |
425 | if (x != NULL) | |
426 | return 1; | |
427 | ||
ab83e314 MC |
428 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signed_certificate_timestamp) |
429 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 430 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SCT, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
431 | return 0; |
432 | } | |
433 | ||
434 | return 1; | |
435 | } | |
436 | #endif | |
437 | ||
8521ced6 MC |
438 | int tls_construct_ctos_ems(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx, |
439 | 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 | 450 | int tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt, X509 *x, |
8521ced6 | 451 | size_t chainidx, 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 | ||
b2f7e8c0 MC |
497 | /* |
498 | * Construct a psk_kex_modes extension. We only have two modes we know about | |
499 | * at this stage, so we send both. | |
500 | */ | |
501 | int tls_construct_ctos_psk_kex_modes(SSL *s, WPACKET *pkt, X509 *x, | |
502 | size_t chainidx, int *al) | |
503 | { | |
504 | #ifndef OPENSSL_NO_TLS1_3 | |
505 | /* | |
506 | * TODO(TLS1.3): Do we want this list to be configurable? For now we always | |
507 | * just send both supported modes | |
508 | */ | |
509 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk_kex_modes) | |
510 | || !WPACKET_start_sub_packet_u16(pkt) | |
511 | || !WPACKET_start_sub_packet_u8(pkt) | |
512 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE_DHE) | |
513 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE) | |
514 | || !WPACKET_close(pkt) | |
515 | || !WPACKET_close(pkt)) { | |
516 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK_KEX_MODES, ERR_R_INTERNAL_ERROR); | |
517 | return 0; | |
518 | } | |
b3ad72ce MC |
519 | |
520 | s->ext.psk_kex_mode = TLSEXT_KEX_MODE_FLAG_KE | TLSEXT_KEX_MODE_FLAG_KE_DHE; | |
b2f7e8c0 MC |
521 | #endif |
522 | ||
523 | return 1; | |
524 | } | |
525 | ||
8521ced6 | 526 | int tls_construct_ctos_key_share(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx, |
30aeba43 | 527 | int *al) |
ab83e314 | 528 | { |
3cf96e88 | 529 | #ifndef OPENSSL_NO_TLS1_3 |
ab83e314 MC |
530 | size_t i, sharessent = 0, num_curves = 0; |
531 | const unsigned char *pcurves = NULL; | |
532 | ||
533 | /* key_share extension */ | |
534 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
535 | /* Extension data sub-packet */ | |
536 | || !WPACKET_start_sub_packet_u16(pkt) | |
537 | /* KeyShare list sub-packet */ | |
538 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 539 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
540 | return 0; |
541 | } | |
542 | ||
aff8c126 | 543 | pcurves = s->ext.supportedgroups; |
ab83e314 | 544 | if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) { |
7fe97c07 | 545 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
546 | return 0; |
547 | } | |
548 | ||
549 | /* | |
550 | * TODO(TLS1.3): Make the number of key_shares sent configurable. For | |
551 | * now, just send one | |
552 | */ | |
553 | for (i = 0; i < num_curves && sharessent < 1; i++, pcurves += 2) { | |
554 | unsigned char *encodedPoint = NULL; | |
555 | unsigned int curve_id = 0; | |
556 | EVP_PKEY *key_share_key = NULL; | |
557 | size_t encodedlen; | |
558 | ||
559 | if (!tls_curve_allowed(s, pcurves, SSL_SECOP_CURVE_SUPPORTED)) | |
560 | continue; | |
561 | ||
562 | if (s->s3->tmp.pkey != NULL) { | |
563 | /* Shouldn't happen! */ | |
7fe97c07 | 564 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
565 | return 0; |
566 | } | |
567 | ||
568 | /* Generate a key for this key_share */ | |
569 | curve_id = (pcurves[0] << 8) | pcurves[1]; | |
570 | key_share_key = ssl_generate_pkey_curve(curve_id); | |
571 | if (key_share_key == NULL) { | |
7fe97c07 | 572 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_EVP_LIB); |
ab83e314 MC |
573 | return 0; |
574 | } | |
575 | ||
576 | /* Encode the public key. */ | |
577 | encodedlen = EVP_PKEY_get1_tls_encodedpoint(key_share_key, | |
578 | &encodedPoint); | |
579 | if (encodedlen == 0) { | |
7fe97c07 | 580 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_EC_LIB); |
ab83e314 MC |
581 | EVP_PKEY_free(key_share_key); |
582 | return 0; | |
583 | } | |
584 | ||
585 | /* Create KeyShareEntry */ | |
586 | if (!WPACKET_put_bytes_u16(pkt, curve_id) | |
587 | || !WPACKET_sub_memcpy_u16(pkt, encodedPoint, encodedlen)) { | |
7fe97c07 | 588 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
589 | EVP_PKEY_free(key_share_key); |
590 | OPENSSL_free(encodedPoint); | |
591 | return 0; | |
592 | } | |
593 | ||
594 | /* | |
595 | * TODO(TLS1.3): When changing to send more than one key_share we're | |
596 | * going to need to be able to save more than one EVP_PKEY. For now | |
597 | * we reuse the existing tmp.pkey | |
598 | */ | |
599 | s->s3->group_id = curve_id; | |
600 | s->s3->tmp.pkey = key_share_key; | |
601 | sharessent++; | |
602 | OPENSSL_free(encodedPoint); | |
603 | } | |
604 | ||
605 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
7fe97c07 | 606 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
607 | return 0; |
608 | } | |
3cf96e88 | 609 | #endif |
ab83e314 MC |
610 | |
611 | return 1; | |
612 | } | |
613 | ||
1266eefd MC |
614 | #define F5_WORKAROUND_MIN_MSG_LEN 0xff |
615 | #define F5_WORKAROUND_MAX_MSG_LEN 0x200 | |
616 | ||
8521ced6 | 617 | int tls_construct_ctos_padding(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx, |
30aeba43 | 618 | int *al) |
ab83e314 MC |
619 | { |
620 | unsigned char *padbytes; | |
621 | size_t hlen; | |
622 | ||
623 | if ((s->options & SSL_OP_TLSEXT_PADDING) == 0) | |
624 | return 1; | |
625 | ||
626 | /* | |
627 | * Add padding to workaround bugs in F5 terminators. See | |
628 | * https://tools.ietf.org/html/draft-agl-tls-padding-03 NB: because this | |
1266eefd | 629 | * code calculates the length of all existing extensions it MUST always |
ab83e314 MC |
630 | * appear last. |
631 | */ | |
632 | if (!WPACKET_get_total_written(pkt, &hlen)) { | |
7fe97c07 | 633 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
634 | return 0; |
635 | } | |
636 | ||
1266eefd MC |
637 | if (hlen > F5_WORKAROUND_MIN_MSG_LEN && hlen < F5_WORKAROUND_MAX_MSG_LEN) { |
638 | /* Calculate the amond of padding we need to add */ | |
639 | hlen = F5_WORKAROUND_MAX_MSG_LEN - hlen; | |
640 | ||
641 | /* | |
642 | * Take off the size of extension header itself (2 bytes for type and | |
643 | * 2 bytes for length bytes) | |
644 | */ | |
ab83e314 MC |
645 | if (hlen >= 4) |
646 | hlen -= 4; | |
647 | else | |
648 | hlen = 0; | |
649 | ||
650 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_padding) | |
651 | || !WPACKET_sub_allocate_bytes_u16(pkt, hlen, &padbytes)) { | |
7fe97c07 | 652 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
653 | return 0; |
654 | } | |
655 | memset(padbytes, 0, hlen); | |
656 | } | |
657 | ||
658 | return 1; | |
659 | } | |
660 | ||
ec15acb6 MC |
661 | /* |
662 | * Construct the pre_shared_key extension | |
663 | */ | |
664 | int tls_construct_ctos_psk(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx, | |
665 | int *al) | |
666 | { | |
667 | #ifndef OPENSSL_NO_TLS1_3 | |
ec15acb6 | 668 | uint32_t now, ages, agems; |
1053a6e2 | 669 | size_t hashsize, binderoffset, msglen; |
ec15acb6 | 670 | unsigned char *binder = NULL, *msgstart = NULL; |
ec15acb6 | 671 | const EVP_MD *md; |
ec15acb6 MC |
672 | int ret = 0; |
673 | ||
674 | s->session->ext.tick_identity = TLSEXT_PSK_BAD_IDENTITY; | |
675 | ||
676 | /* | |
677 | * If this is a new session then we have nothing to resume so don't add | |
678 | * this extension. | |
679 | */ | |
680 | if (s->session->ext.ticklen == 0) | |
681 | return 1; | |
682 | ||
683 | /* | |
684 | * Technically the C standard just says time() returns a time_t and says | |
685 | * nothing about the encoding of that type. In practice most implementations | |
686 | * follow POSIX which holds it as an integral type in seconds since epoch. | |
687 | * We've already made the assumption that we can do this in multiple places | |
688 | * in the code, so portability shouldn't be an issue. | |
689 | */ | |
690 | now = (uint32_t)time(NULL); | |
691 | ages = now - (uint32_t)s->session->time; | |
692 | ||
fc24f0bf MC |
693 | if (s->session->ext.tick_lifetime_hint < ages) { |
694 | /* Ticket is too old. Ignore it. */ | |
695 | return 1; | |
696 | } | |
697 | ||
ec15acb6 MC |
698 | /* |
699 | * Calculate age in ms. We're just doing it to nearest second. Should be | |
700 | * good enough. | |
701 | */ | |
702 | agems = ages * (uint32_t)1000; | |
703 | ||
704 | if (ages != 0 && agems / (uint32_t)1000 != ages) { | |
705 | /* | |
706 | * Overflow. Shouldn't happen unless this is a *really* old session. If | |
707 | * so we just ignore it. | |
708 | */ | |
709 | return 1; | |
710 | } | |
711 | ||
fc24f0bf MC |
712 | /* |
713 | * Obfuscate the age. Overflow here is fine, this addition is supposed to | |
714 | * be mod 2^32. | |
715 | */ | |
716 | agems += s->session->ext.tick_age_add; | |
ec15acb6 | 717 | |
1053a6e2 MC |
718 | md = ssl_cipher_get_handshake_md(s->session->cipher_id); |
719 | if (md == NULL) { | |
ec15acb6 MC |
720 | /* Don't recognise this cipher so we can't use the session. Ignore it */ |
721 | return 1; | |
722 | } | |
1053a6e2 | 723 | |
ec15acb6 MC |
724 | hashsize = EVP_MD_size(md); |
725 | ||
726 | /* Create the extension, but skip over the binder for now */ | |
727 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk) | |
728 | || !WPACKET_start_sub_packet_u16(pkt) | |
729 | || !WPACKET_start_sub_packet_u16(pkt) | |
730 | || !WPACKET_sub_memcpy_u16(pkt, s->session->ext.tick, | |
731 | s->session->ext.ticklen) | |
732 | || !WPACKET_put_bytes_u32(pkt, agems) | |
733 | || !WPACKET_close(pkt) | |
734 | || !WPACKET_get_total_written(pkt, &binderoffset) | |
735 | || !WPACKET_start_sub_packet_u16(pkt) | |
736 | || !WPACKET_sub_allocate_bytes_u8(pkt, hashsize, &binder) | |
737 | || !WPACKET_close(pkt) | |
738 | || !WPACKET_close(pkt) | |
739 | || !WPACKET_get_total_written(pkt, &msglen) | |
740 | /* | |
741 | * We need to fill in all the sub-packet lengths now so we can | |
742 | * calculate the HMAC of the message up to the binders | |
743 | */ | |
744 | || !WPACKET_fill_lengths(pkt)) { | |
745 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR); | |
746 | goto err; | |
747 | } | |
748 | ||
749 | msgstart = WPACKET_get_curr(pkt) - msglen; | |
750 | ||
1053a6e2 MC |
751 | if (tls_psk_do_binder(s, md, msgstart, binderoffset, NULL, binder, |
752 | s->session, 1) != 1) { | |
ec15acb6 MC |
753 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR); |
754 | goto err; | |
755 | } | |
756 | ||
757 | s->session->ext.tick_identity = 0; | |
758 | ||
759 | ret = 1; | |
760 | err: | |
ec15acb6 MC |
761 | return ret; |
762 | #else | |
763 | return 1; | |
764 | #endif | |
765 | } | |
766 | ||
6dd083fd MC |
767 | /* |
768 | * Parse the server's renegotiation binding and abort if it's not right | |
769 | */ | |
8521ced6 | 770 | int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, |
f97d4c37 | 771 | int *al) |
6dd083fd MC |
772 | { |
773 | size_t expected_len = s->s3->previous_client_finished_len | |
774 | + s->s3->previous_server_finished_len; | |
775 | size_t ilen; | |
776 | const unsigned char *data; | |
777 | ||
778 | /* Check for logic errors */ | |
779 | assert(expected_len == 0 || s->s3->previous_client_finished_len != 0); | |
780 | assert(expected_len == 0 || s->s3->previous_server_finished_len != 0); | |
781 | ||
782 | /* Parse the length byte */ | |
783 | if (!PACKET_get_1_len(pkt, &ilen)) { | |
7fe97c07 | 784 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
785 | SSL_R_RENEGOTIATION_ENCODING_ERR); |
786 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
787 | return 0; | |
788 | } | |
789 | ||
790 | /* Consistency check */ | |
791 | if (PACKET_remaining(pkt) != ilen) { | |
7fe97c07 | 792 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
793 | SSL_R_RENEGOTIATION_ENCODING_ERR); |
794 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
795 | return 0; | |
796 | } | |
797 | ||
798 | /* Check that the extension matches */ | |
799 | if (ilen != expected_len) { | |
7fe97c07 | 800 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
801 | SSL_R_RENEGOTIATION_MISMATCH); |
802 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
803 | return 0; | |
804 | } | |
805 | ||
806 | if (!PACKET_get_bytes(pkt, &data, s->s3->previous_client_finished_len) | |
807 | || memcmp(data, s->s3->previous_client_finished, | |
808 | s->s3->previous_client_finished_len) != 0) { | |
7fe97c07 | 809 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
810 | SSL_R_RENEGOTIATION_MISMATCH); |
811 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
812 | return 0; | |
813 | } | |
814 | ||
815 | if (!PACKET_get_bytes(pkt, &data, s->s3->previous_server_finished_len) | |
816 | || memcmp(data, s->s3->previous_server_finished, | |
817 | s->s3->previous_server_finished_len) != 0) { | |
7fe97c07 | 818 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
819 | SSL_R_RENEGOTIATION_MISMATCH); |
820 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
821 | return 0; | |
822 | } | |
823 | s->s3->send_connection_binding = 1; | |
824 | ||
825 | return 1; | |
826 | } | |
827 | ||
8521ced6 | 828 | int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, |
f97d4c37 | 829 | int *al) |
6dd083fd | 830 | { |
aff8c126 | 831 | if (s->ext.hostname == NULL || PACKET_remaining(pkt) > 0) { |
6dd083fd MC |
832 | *al = SSL_AD_UNRECOGNIZED_NAME; |
833 | return 0; | |
834 | } | |
835 | ||
836 | if (!s->hit) { | |
aff8c126 | 837 | if (s->session->ext.hostname != NULL) { |
6dd083fd MC |
838 | *al = SSL_AD_INTERNAL_ERROR; |
839 | return 0; | |
840 | } | |
aff8c126 RS |
841 | s->session->ext.hostname = OPENSSL_strdup(s->ext.hostname); |
842 | if (s->session->ext.hostname == NULL) { | |
6dd083fd MC |
843 | *al = SSL_AD_INTERNAL_ERROR; |
844 | return 0; | |
845 | } | |
846 | } | |
847 | ||
848 | return 1; | |
849 | } | |
850 | ||
851 | #ifndef OPENSSL_NO_EC | |
8521ced6 | 852 | int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, |
f97d4c37 | 853 | int *al) |
6dd083fd | 854 | { |
aff8c126 | 855 | unsigned int ecpointformats_len; |
6dd083fd MC |
856 | PACKET ecptformatlist; |
857 | ||
858 | if (!PACKET_as_length_prefixed_1(pkt, &ecptformatlist)) { | |
859 | *al = SSL_AD_DECODE_ERROR; | |
860 | return 0; | |
861 | } | |
862 | if (!s->hit) { | |
aff8c126 RS |
863 | ecpointformats_len = PACKET_remaining(&ecptformatlist); |
864 | s->session->ext.ecpointformats_len = 0; | |
6dd083fd | 865 | |
aff8c126 RS |
866 | OPENSSL_free(s->session->ext.ecpointformats); |
867 | s->session->ext.ecpointformats = OPENSSL_malloc(ecpointformats_len); | |
868 | if (s->session->ext.ecpointformats == NULL) { | |
6dd083fd MC |
869 | *al = SSL_AD_INTERNAL_ERROR; |
870 | return 0; | |
871 | } | |
872 | ||
aff8c126 | 873 | s->session->ext.ecpointformats_len = ecpointformats_len; |
6dd083fd MC |
874 | |
875 | if (!PACKET_copy_bytes(&ecptformatlist, | |
aff8c126 RS |
876 | s->session->ext.ecpointformats, |
877 | ecpointformats_len)) { | |
6dd083fd MC |
878 | *al = SSL_AD_INTERNAL_ERROR; |
879 | return 0; | |
880 | } | |
881 | } | |
882 | ||
883 | return 1; | |
884 | } | |
885 | #endif | |
886 | ||
8521ced6 | 887 | int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, |
f97d4c37 | 888 | int *al) |
6dd083fd | 889 | { |
aff8c126 RS |
890 | if (s->ext.session_ticket_cb != NULL && |
891 | !s->ext.session_ticket_cb(s, PACKET_data(pkt), | |
892 | PACKET_remaining(pkt), | |
893 | s->ext.session_ticket_cb_arg)) { | |
6dd083fd MC |
894 | *al = SSL_AD_INTERNAL_ERROR; |
895 | return 0; | |
896 | } | |
1266eefd | 897 | |
6dd083fd MC |
898 | if (!tls_use_ticket(s) || PACKET_remaining(pkt) > 0) { |
899 | *al = SSL_AD_UNSUPPORTED_EXTENSION; | |
900 | return 0; | |
901 | } | |
1266eefd | 902 | |
aff8c126 | 903 | s->ext.ticket_expected = 1; |
6dd083fd MC |
904 | |
905 | return 1; | |
906 | } | |
907 | ||
ab83e314 | 908 | #ifndef OPENSSL_NO_OCSP |
8521ced6 | 909 | int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, |
f97d4c37 | 910 | int *al) |
6dd083fd MC |
911 | { |
912 | /* | |
f63e4288 MC |
913 | * MUST only be sent if we've requested a status |
914 | * request message. In TLS <= 1.2 it must also be empty. | |
6dd083fd | 915 | */ |
aff8c126 | 916 | if (s->ext.status_type == TLSEXT_STATUSTYPE_nothing |
f63e4288 | 917 | || (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) > 0)) { |
6dd083fd MC |
918 | *al = SSL_AD_UNSUPPORTED_EXTENSION; |
919 | return 0; | |
920 | } | |
f63e4288 MC |
921 | |
922 | if (SSL_IS_TLS13(s)) { | |
923 | /* We only know how to handle this if it's for the first Certificate in | |
924 | * the chain. We ignore any other repsonses. | |
925 | */ | |
8521ced6 | 926 | if (chainidx != 0) |
f63e4288 MC |
927 | return 1; |
928 | return tls_process_cert_status_body(s, pkt, al); | |
929 | } | |
930 | ||
6dd083fd | 931 | /* Set flag to expect CertificateStatus message */ |
aff8c126 | 932 | s->ext.status_expected = 1; |
6dd083fd MC |
933 | |
934 | return 1; | |
935 | } | |
ab83e314 | 936 | #endif |
6dd083fd MC |
937 | |
938 | ||
939 | #ifndef OPENSSL_NO_CT | |
8521ced6 | 940 | int tls_parse_stoc_sct(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al) |
6dd083fd MC |
941 | { |
942 | /* | |
943 | * Only take it if we asked for it - i.e if there is no CT validation | |
944 | * callback set, then a custom extension MAY be processing it, so we | |
945 | * need to let control continue to flow to that. | |
946 | */ | |
947 | if (s->ct_validation_callback != NULL) { | |
948 | size_t size = PACKET_remaining(pkt); | |
949 | ||
950 | /* Simply copy it off for later processing */ | |
aff8c126 RS |
951 | OPENSSL_free(s->ext.scts); |
952 | s->ext.scts = NULL; | |
1266eefd | 953 | |
aff8c126 | 954 | s->ext.scts_len = size; |
6dd083fd | 955 | if (size > 0) { |
aff8c126 RS |
956 | s->ext.scts = OPENSSL_malloc(size); |
957 | if (s->ext.scts == NULL | |
958 | || !PACKET_copy_bytes(pkt, s->ext.scts, size)) { | |
6dd083fd MC |
959 | *al = SSL_AD_INTERNAL_ERROR; |
960 | return 0; | |
961 | } | |
962 | } | |
963 | } else { | |
964 | if (custom_ext_parse(s, 0, TLSEXT_TYPE_signed_certificate_timestamp, | |
965 | PACKET_data(pkt), PACKET_remaining(pkt), al) <= 0) | |
966 | return 0; | |
967 | } | |
968 | ||
969 | return 1; | |
970 | } | |
971 | #endif | |
972 | ||
973 | ||
974 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
975 | /* | |
976 | * ssl_next_proto_validate validates a Next Protocol Negotiation block. No | |
977 | * elements of zero length are allowed and the set of elements must exactly | |
978 | * fill the length of the block. Returns 1 on success or 0 on failure. | |
979 | */ | |
980 | static int ssl_next_proto_validate(PACKET *pkt) | |
981 | { | |
982 | PACKET tmp_protocol; | |
983 | ||
984 | while (PACKET_remaining(pkt)) { | |
985 | if (!PACKET_get_length_prefixed_1(pkt, &tmp_protocol) | |
986 | || PACKET_remaining(&tmp_protocol) == 0) | |
987 | return 0; | |
988 | } | |
989 | ||
990 | return 1; | |
991 | } | |
992 | ||
8521ced6 | 993 | int tls_parse_stoc_npn(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al) |
6dd083fd MC |
994 | { |
995 | unsigned char *selected; | |
996 | unsigned char selected_len; | |
997 | PACKET tmppkt; | |
998 | ||
1266eefd | 999 | /* Check if we are in a renegotiation. If so ignore this extension */ |
c7f47786 | 1000 | if (!SSL_IS_FIRST_HANDSHAKE(s)) |
6dd083fd MC |
1001 | return 1; |
1002 | ||
1003 | /* We must have requested it. */ | |
aff8c126 | 1004 | if (s->ctx->ext.npn_select_cb == NULL) { |
6dd083fd MC |
1005 | *al = SSL_AD_UNSUPPORTED_EXTENSION; |
1006 | return 0; | |
1007 | } | |
1266eefd | 1008 | |
6dd083fd MC |
1009 | /* The data must be valid */ |
1010 | tmppkt = *pkt; | |
1011 | if (!ssl_next_proto_validate(&tmppkt)) { | |
1012 | *al = SSL_AD_DECODE_ERROR; | |
1013 | return 0; | |
1014 | } | |
aff8c126 RS |
1015 | if (s->ctx->ext.npn_select_cb(s, &selected, &selected_len, |
1016 | PACKET_data(pkt), | |
1017 | PACKET_remaining(pkt), | |
1018 | s->ctx->ext.npn_select_cb_arg) != | |
6dd083fd MC |
1019 | SSL_TLSEXT_ERR_OK) { |
1020 | *al = SSL_AD_INTERNAL_ERROR; | |
1021 | return 0; | |
1022 | } | |
1266eefd | 1023 | |
6dd083fd MC |
1024 | /* |
1025 | * Could be non-NULL if server has sent multiple NPN extensions in | |
1026 | * a single Serverhello | |
1027 | */ | |
aff8c126 RS |
1028 | OPENSSL_free(s->ext.npn); |
1029 | s->ext.npn = OPENSSL_malloc(selected_len); | |
1030 | if (s->ext.npn == NULL) { | |
6dd083fd MC |
1031 | *al = SSL_AD_INTERNAL_ERROR; |
1032 | return 0; | |
1033 | } | |
1034 | ||
aff8c126 RS |
1035 | memcpy(s->ext.npn, selected, selected_len); |
1036 | s->ext.npn_len = selected_len; | |
1037 | s->s3->npn_seen = 1; | |
6dd083fd MC |
1038 | |
1039 | return 1; | |
1040 | } | |
1041 | #endif | |
1042 | ||
8521ced6 | 1043 | int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al) |
6dd083fd MC |
1044 | { |
1045 | size_t len; | |
1046 | ||
1047 | /* We must have requested it. */ | |
1048 | if (!s->s3->alpn_sent) { | |
1049 | *al = SSL_AD_UNSUPPORTED_EXTENSION; | |
1050 | return 0; | |
1051 | } | |
1052 | /*- | |
1053 | * The extension data consists of: | |
1054 | * uint16 list_length | |
1055 | * uint8 proto_length; | |
1056 | * uint8 proto[proto_length]; | |
1057 | */ | |
1058 | if (!PACKET_get_net_2_len(pkt, &len) | |
1059 | || PACKET_remaining(pkt) != len || !PACKET_get_1_len(pkt, &len) | |
1060 | || PACKET_remaining(pkt) != len) { | |
1061 | *al = SSL_AD_DECODE_ERROR; | |
1062 | return 0; | |
1063 | } | |
1064 | OPENSSL_free(s->s3->alpn_selected); | |
1065 | s->s3->alpn_selected = OPENSSL_malloc(len); | |
1066 | if (s->s3->alpn_selected == NULL) { | |
1067 | *al = SSL_AD_INTERNAL_ERROR; | |
1068 | return 0; | |
1069 | } | |
1070 | if (!PACKET_copy_bytes(pkt, s->s3->alpn_selected, len)) { | |
1071 | *al = SSL_AD_DECODE_ERROR; | |
1072 | return 0; | |
1073 | } | |
1074 | s->s3->alpn_selected_len = len; | |
1075 | ||
1076 | return 1; | |
1077 | } | |
1078 | ||
1079 | #ifndef OPENSSL_NO_SRTP | |
8521ced6 MC |
1080 | int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, |
1081 | int *al) | |
6dd083fd MC |
1082 | { |
1083 | unsigned int id, ct, mki; | |
1084 | int i; | |
1085 | STACK_OF(SRTP_PROTECTION_PROFILE) *clnt; | |
1086 | SRTP_PROTECTION_PROFILE *prof; | |
1087 | ||
1266eefd MC |
1088 | if (!PACKET_get_net_2(pkt, &ct) || ct != 2 |
1089 | || !PACKET_get_net_2(pkt, &id) | |
1090 | || !PACKET_get_1(pkt, &mki) | |
1091 | || PACKET_remaining(pkt) != 0) { | |
7fe97c07 | 1092 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, |
6dd083fd MC |
1093 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
1094 | *al = SSL_AD_DECODE_ERROR; | |
1095 | return 0; | |
1096 | } | |
1097 | ||
1098 | if (mki != 0) { | |
1099 | /* Must be no MKI, since we never offer one */ | |
7fe97c07 | 1100 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, SSL_R_BAD_SRTP_MKI_VALUE); |
6dd083fd MC |
1101 | *al = SSL_AD_ILLEGAL_PARAMETER; |
1102 | return 0; | |
1103 | } | |
1104 | ||
6dd083fd | 1105 | /* Throw an error if the server gave us an unsolicited extension */ |
1266eefd | 1106 | clnt = SSL_get_srtp_profiles(s); |
6dd083fd | 1107 | if (clnt == NULL) { |
7fe97c07 | 1108 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, SSL_R_NO_SRTP_PROFILES); |
6dd083fd MC |
1109 | *al = SSL_AD_DECODE_ERROR; |
1110 | return 0; | |
1111 | } | |
1112 | ||
1113 | /* | |
1114 | * Check to see if the server gave us something we support (and | |
1115 | * presumably offered) | |
1116 | */ | |
1117 | for (i = 0; i < sk_SRTP_PROTECTION_PROFILE_num(clnt); i++) { | |
1118 | prof = sk_SRTP_PROTECTION_PROFILE_value(clnt, i); | |
1119 | ||
1120 | if (prof->id == id) { | |
1121 | s->srtp_profile = prof; | |
1122 | *al = 0; | |
1123 | return 1; | |
1124 | } | |
1125 | } | |
1126 | ||
7fe97c07 | 1127 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, |
6dd083fd MC |
1128 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
1129 | *al = SSL_AD_DECODE_ERROR; | |
1130 | return 0; | |
1131 | } | |
1132 | #endif | |
1133 | ||
8521ced6 | 1134 | int tls_parse_stoc_etm(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al) |
6dd083fd MC |
1135 | { |
1136 | /* Ignore if inappropriate ciphersuite */ | |
1137 | if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC) | |
1138 | && s->s3->tmp.new_cipher->algorithm_mac != SSL_AEAD | |
1139 | && s->s3->tmp.new_cipher->algorithm_enc != SSL_RC4) | |
1140 | s->s3->flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC; | |
1141 | ||
1142 | return 1; | |
1143 | } | |
1144 | ||
8521ced6 | 1145 | int tls_parse_stoc_ems(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al) |
6dd083fd MC |
1146 | { |
1147 | s->s3->flags |= TLS1_FLAGS_RECEIVED_EXTMS; | |
1148 | if (!s->hit) | |
1149 | s->session->flags |= SSL_SESS_FLAG_EXTMS; | |
1150 | ||
1151 | return 1; | |
1152 | } | |
1153 | ||
8521ced6 | 1154 | int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, |
f97d4c37 | 1155 | int *al) |
6dd083fd | 1156 | { |
3cf96e88 | 1157 | #ifndef OPENSSL_NO_TLS1_3 |
6dd083fd MC |
1158 | unsigned int group_id; |
1159 | PACKET encoded_pt; | |
1160 | EVP_PKEY *ckey = s->s3->tmp.pkey, *skey = NULL; | |
1161 | ||
1162 | /* Sanity check */ | |
1163 | if (ckey == NULL) { | |
1164 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 1165 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1166 | return 0; |
1167 | } | |
1168 | ||
1169 | if (!PACKET_get_net_2(pkt, &group_id)) { | |
1170 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
7fe97c07 | 1171 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_LENGTH_MISMATCH); |
6dd083fd MC |
1172 | return 0; |
1173 | } | |
1174 | ||
1175 | if (group_id != s->s3->group_id) { | |
1176 | /* | |
1177 | * This isn't for the group that we sent in the original | |
1178 | * key_share! | |
1179 | */ | |
1180 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
7fe97c07 | 1181 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE); |
6dd083fd MC |
1182 | return 0; |
1183 | } | |
1184 | ||
1185 | if (!PACKET_as_length_prefixed_2(pkt, &encoded_pt) | |
1186 | || PACKET_remaining(&encoded_pt) == 0) { | |
1187 | *al = SSL_AD_DECODE_ERROR; | |
7fe97c07 | 1188 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_LENGTH_MISMATCH); |
6dd083fd MC |
1189 | return 0; |
1190 | } | |
1191 | ||
1192 | skey = ssl_generate_pkey(ckey); | |
1193 | if (skey == NULL) { | |
1194 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 1195 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_MALLOC_FAILURE); |
6dd083fd MC |
1196 | return 0; |
1197 | } | |
1198 | if (!EVP_PKEY_set1_tls_encodedpoint(skey, PACKET_data(&encoded_pt), | |
1199 | PACKET_remaining(&encoded_pt))) { | |
1200 | *al = SSL_AD_DECODE_ERROR; | |
7fe97c07 | 1201 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_ECPOINT); |
a1d6a0b6 | 1202 | EVP_PKEY_free(skey); |
6dd083fd MC |
1203 | return 0; |
1204 | } | |
1205 | ||
1206 | if (ssl_derive(s, ckey, skey, 1) == 0) { | |
1207 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 1208 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1209 | EVP_PKEY_free(skey); |
1210 | return 0; | |
1211 | } | |
1212 | EVP_PKEY_free(skey); | |
3cf96e88 | 1213 | #endif |
6dd083fd MC |
1214 | |
1215 | return 1; | |
1216 | } | |
4ff65f77 MC |
1217 | |
1218 | int tls_parse_stoc_psk(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al) | |
1219 | { | |
1220 | #ifndef OPENSSL_NO_TLS1_3 | |
1221 | unsigned int identity; | |
1222 | ||
1223 | if (!PACKET_get_net_2(pkt, &identity) || PACKET_remaining(pkt) != 0) { | |
1224 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
1225 | SSLerr(SSL_F_TLS_PARSE_STOC_PSK, SSL_R_LENGTH_MISMATCH); | |
1226 | return 0; | |
1227 | } | |
1228 | ||
1229 | if (s->session->ext.tick_identity != (int)identity) { | |
1230 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
1231 | SSLerr(SSL_F_TLS_PARSE_STOC_PSK, SSL_R_BAD_PSK_IDENTITY); | |
1232 | return 0; | |
1233 | } | |
1234 | ||
1235 | s->hit = 1; | |
1236 | #endif | |
1237 | ||
1238 | return 1; | |
1239 | } |