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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 | ||
61138358 MC |
15 | int tls_construct_ctos_renegotiate(SSL *s, WPACKET *pkt, unsigned int context, |
16 | X509 *x, 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 | ||
61138358 MC |
34 | int tls_construct_ctos_server_name(SSL *s, WPACKET *pkt, unsigned int context, |
35 | X509 *x, 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 | |
61138358 MC |
59 | int tls_construct_ctos_srp(SSL *s, WPACKET *pkt, unsigned int context, X509 *x, |
60 | size_t chainidx, 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 | ||
61138358 MC |
111 | int tls_construct_ctos_ec_pt_formats(SSL *s, WPACKET *pkt, unsigned int context, |
112 | X509 *x, 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 | ||
61138358 MC |
135 | int tls_construct_ctos_supported_groups(SSL *s, WPACKET *pkt, |
136 | unsigned int context, X509 *x, | |
8521ced6 | 137 | size_t chainidx, int *al) |
ab83e314 MC |
138 | { |
139 | const unsigned char *pcurves = NULL, *pcurvestmp; | |
140 | size_t num_curves = 0, i; | |
141 | ||
142 | if (!use_ecc(s)) | |
143 | return 1; | |
144 | ||
145 | /* | |
146 | * Add TLS extension supported_groups to the ClientHello message | |
147 | */ | |
148 | /* TODO(TLS1.3): Add support for DHE groups */ | |
aff8c126 | 149 | pcurves = s->ext.supportedgroups; |
ab83e314 | 150 | if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) { |
7fe97c07 | 151 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, |
ab83e314 MC |
152 | ERR_R_INTERNAL_ERROR); |
153 | return 0; | |
154 | } | |
155 | pcurvestmp = pcurves; | |
156 | ||
157 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_groups) | |
158 | /* Sub-packet for supported_groups extension */ | |
159 | || !WPACKET_start_sub_packet_u16(pkt) | |
160 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 161 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, |
ab83e314 MC |
162 | ERR_R_INTERNAL_ERROR); |
163 | return 0; | |
164 | } | |
165 | /* Copy curve ID if supported */ | |
166 | for (i = 0; i < num_curves; i++, pcurvestmp += 2) { | |
7d061fce | 167 | if (tls_curve_allowed(s, pcurvestmp, SSL_SECOP_CURVE_SUPPORTED)) { |
ab83e314 MC |
168 | if (!WPACKET_put_bytes_u8(pkt, pcurvestmp[0]) |
169 | || !WPACKET_put_bytes_u8(pkt, pcurvestmp[1])) { | |
7fe97c07 | 170 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, |
ab83e314 MC |
171 | ERR_R_INTERNAL_ERROR); |
172 | return 0; | |
173 | } | |
174 | } | |
175 | } | |
176 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
7fe97c07 | 177 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, |
ab83e314 MC |
178 | ERR_R_INTERNAL_ERROR); |
179 | return 0; | |
180 | } | |
181 | ||
182 | return 1; | |
183 | } | |
184 | #endif | |
185 | ||
61138358 MC |
186 | int tls_construct_ctos_session_ticket(SSL *s, WPACKET *pkt, |
187 | unsigned int context, X509 *x, | |
8521ced6 | 188 | size_t chainidx, int *al) |
ab83e314 MC |
189 | { |
190 | size_t ticklen; | |
191 | ||
192 | if (!tls_use_ticket(s)) | |
193 | return 1; | |
194 | ||
195 | if (!s->new_session && s->session != NULL | |
08191294 MC |
196 | && s->session->ext.tick != NULL |
197 | && s->session->ssl_version != TLS1_3_VERSION) { | |
aff8c126 RS |
198 | ticklen = s->session->ext.ticklen; |
199 | } else if (s->session && s->ext.session_ticket != NULL | |
200 | && s->ext.session_ticket->data != NULL) { | |
201 | ticklen = s->ext.session_ticket->length; | |
202 | s->session->ext.tick = OPENSSL_malloc(ticklen); | |
203 | if (s->session->ext.tick == NULL) { | |
7fe97c07 | 204 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET, |
ab83e314 MC |
205 | ERR_R_INTERNAL_ERROR); |
206 | return 0; | |
207 | } | |
aff8c126 RS |
208 | memcpy(s->session->ext.tick, |
209 | s->ext.session_ticket->data, ticklen); | |
210 | s->session->ext.ticklen = ticklen; | |
ab83e314 MC |
211 | } else { |
212 | ticklen = 0; | |
213 | } | |
214 | ||
aff8c126 RS |
215 | if (ticklen == 0 && s->ext.session_ticket != NULL && |
216 | s->ext.session_ticket->data == NULL) | |
ab83e314 MC |
217 | return 1; |
218 | ||
219 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket) | |
aff8c126 | 220 | || !WPACKET_sub_memcpy_u16(pkt, s->session->ext.tick, ticklen)) { |
7fe97c07 | 221 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
222 | return 0; |
223 | } | |
224 | ||
225 | return 1; | |
226 | } | |
227 | ||
61138358 MC |
228 | int tls_construct_ctos_sig_algs(SSL *s, WPACKET *pkt, unsigned int context, |
229 | X509 *x, size_t chainidx, int *al) | |
ab83e314 MC |
230 | { |
231 | size_t salglen; | |
98c792d1 | 232 | const uint16_t *salg; |
ab83e314 MC |
233 | |
234 | if (!SSL_CLIENT_USE_SIGALGS(s)) | |
235 | return 1; | |
236 | ||
a9669ddc | 237 | salglen = tls12_get_psigalgs(s, 1, &salg); |
ab83e314 MC |
238 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signature_algorithms) |
239 | /* Sub-packet for sig-algs extension */ | |
240 | || !WPACKET_start_sub_packet_u16(pkt) | |
241 | /* Sub-packet for the actual list */ | |
242 | || !WPACKET_start_sub_packet_u16(pkt) | |
243 | || !tls12_copy_sigalgs(s, pkt, salg, salglen) | |
244 | || !WPACKET_close(pkt) | |
245 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 246 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SIG_ALGS, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
247 | return 0; |
248 | } | |
249 | ||
250 | return 1; | |
251 | } | |
252 | ||
253 | #ifndef OPENSSL_NO_OCSP | |
61138358 MC |
254 | int tls_construct_ctos_status_request(SSL *s, WPACKET *pkt, |
255 | unsigned int context, X509 *x, | |
8521ced6 | 256 | size_t chainidx, int *al) |
ab83e314 MC |
257 | { |
258 | int i; | |
259 | ||
e96e0f8e MC |
260 | /* This extension isn't defined for client Certificates */ |
261 | if (x != NULL) | |
262 | return 1; | |
263 | ||
aff8c126 | 264 | if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) |
ab83e314 MC |
265 | return 1; |
266 | ||
267 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request) | |
268 | /* Sub-packet for status request extension */ | |
269 | || !WPACKET_start_sub_packet_u16(pkt) | |
270 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_STATUSTYPE_ocsp) | |
271 | /* Sub-packet for the ids */ | |
272 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 273 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
274 | return 0; |
275 | } | |
aff8c126 | 276 | for (i = 0; i < sk_OCSP_RESPID_num(s->ext.ocsp.ids); i++) { |
ab83e314 | 277 | unsigned char *idbytes; |
aff8c126 | 278 | OCSP_RESPID *id = sk_OCSP_RESPID_value(s->ext.ocsp.ids, i); |
1266eefd | 279 | int idlen = i2d_OCSP_RESPID(id, NULL); |
ab83e314 | 280 | |
ab83e314 MC |
281 | if (idlen <= 0 |
282 | /* Sub-packet for an individual id */ | |
283 | || !WPACKET_sub_allocate_bytes_u16(pkt, idlen, &idbytes) | |
284 | || i2d_OCSP_RESPID(id, &idbytes) != idlen) { | |
7fe97c07 | 285 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, |
ab83e314 MC |
286 | ERR_R_INTERNAL_ERROR); |
287 | return 0; | |
288 | } | |
289 | } | |
290 | if (!WPACKET_close(pkt) | |
291 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 292 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
293 | return 0; |
294 | } | |
aff8c126 | 295 | if (s->ext.ocsp.exts) { |
ab83e314 | 296 | unsigned char *extbytes; |
aff8c126 | 297 | int extlen = i2d_X509_EXTENSIONS(s->ext.ocsp.exts, NULL); |
ab83e314 MC |
298 | |
299 | if (extlen < 0) { | |
7fe97c07 | 300 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, |
ab83e314 MC |
301 | ERR_R_INTERNAL_ERROR); |
302 | return 0; | |
303 | } | |
304 | if (!WPACKET_allocate_bytes(pkt, extlen, &extbytes) | |
aff8c126 | 305 | || i2d_X509_EXTENSIONS(s->ext.ocsp.exts, &extbytes) |
ab83e314 | 306 | != extlen) { |
7fe97c07 | 307 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, |
ab83e314 MC |
308 | ERR_R_INTERNAL_ERROR); |
309 | return 0; | |
310 | } | |
311 | } | |
312 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
7fe97c07 | 313 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
314 | return 0; |
315 | } | |
316 | ||
317 | return 1; | |
318 | } | |
319 | #endif | |
320 | ||
321 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
61138358 MC |
322 | int tls_construct_ctos_npn(SSL *s, WPACKET *pkt, unsigned int context, X509 *x, |
323 | size_t chainidx, int *al) | |
ab83e314 | 324 | { |
c7f47786 | 325 | if (s->ctx->ext.npn_select_cb == NULL || !SSL_IS_FIRST_HANDSHAKE(s)) |
ab83e314 MC |
326 | return 1; |
327 | ||
328 | /* | |
329 | * The client advertises an empty extension to indicate its support | |
330 | * for Next Protocol Negotiation | |
331 | */ | |
332 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_next_proto_neg) | |
333 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 334 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_NPN, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
335 | return 0; |
336 | } | |
337 | ||
338 | return 1; | |
339 | } | |
340 | #endif | |
341 | ||
61138358 MC |
342 | int tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, unsigned int context, X509 *x, |
343 | size_t chainidx, int *al) | |
ab83e314 MC |
344 | { |
345 | s->s3->alpn_sent = 0; | |
346 | ||
c7f47786 | 347 | if (s->ext.alpn == NULL || !SSL_IS_FIRST_HANDSHAKE(s)) |
ab83e314 MC |
348 | return 1; |
349 | ||
350 | if (!WPACKET_put_bytes_u16(pkt, | |
351 | TLSEXT_TYPE_application_layer_protocol_negotiation) | |
352 | /* Sub-packet ALPN extension */ | |
353 | || !WPACKET_start_sub_packet_u16(pkt) | |
aff8c126 | 354 | || !WPACKET_sub_memcpy_u16(pkt, s->ext.alpn, s->ext.alpn_len) |
ab83e314 | 355 | || !WPACKET_close(pkt)) { |
7fe97c07 | 356 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ALPN, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
357 | return 0; |
358 | } | |
359 | s->s3->alpn_sent = 1; | |
360 | ||
361 | return 1; | |
362 | } | |
363 | ||
364 | ||
365 | #ifndef OPENSSL_NO_SRTP | |
61138358 MC |
366 | int tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt, unsigned int context, |
367 | X509 *x, size_t chainidx, int *al) | |
ab83e314 MC |
368 | { |
369 | STACK_OF(SRTP_PROTECTION_PROFILE) *clnt = SSL_get_srtp_profiles(s); | |
1266eefd | 370 | int i, end; |
ab83e314 MC |
371 | |
372 | if (clnt == NULL) | |
373 | return 1; | |
374 | ||
375 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp) | |
376 | /* Sub-packet for SRTP extension */ | |
377 | || !WPACKET_start_sub_packet_u16(pkt) | |
378 | /* Sub-packet for the protection profile list */ | |
379 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 380 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
381 | return 0; |
382 | } | |
1266eefd MC |
383 | |
384 | end = sk_SRTP_PROTECTION_PROFILE_num(clnt); | |
385 | for (i = 0; i < end; i++) { | |
386 | const SRTP_PROTECTION_PROFILE *prof = | |
387 | sk_SRTP_PROTECTION_PROFILE_value(clnt, i); | |
388 | ||
ab83e314 | 389 | if (prof == NULL || !WPACKET_put_bytes_u16(pkt, prof->id)) { |
7fe97c07 | 390 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
391 | return 0; |
392 | } | |
393 | } | |
394 | if (!WPACKET_close(pkt) | |
395 | /* Add an empty use_mki value */ | |
396 | || !WPACKET_put_bytes_u8(pkt, 0) | |
397 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 398 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
399 | return 0; |
400 | } | |
401 | ||
402 | return 1; | |
403 | } | |
404 | #endif | |
405 | ||
61138358 MC |
406 | int tls_construct_ctos_etm(SSL *s, WPACKET *pkt, unsigned int context, X509 *x, |
407 | size_t chainidx, int *al) | |
ab83e314 MC |
408 | { |
409 | if (s->options & SSL_OP_NO_ENCRYPT_THEN_MAC) | |
410 | return 1; | |
411 | ||
412 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac) | |
413 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 414 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ETM, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
415 | return 0; |
416 | } | |
417 | ||
418 | return 1; | |
419 | } | |
420 | ||
421 | #ifndef OPENSSL_NO_CT | |
61138358 MC |
422 | int tls_construct_ctos_sct(SSL *s, WPACKET *pkt, unsigned int context, X509 *x, |
423 | size_t chainidx, int *al) | |
ab83e314 MC |
424 | { |
425 | if (s->ct_validation_callback == NULL) | |
426 | return 1; | |
427 | ||
e96e0f8e MC |
428 | /* Not defined for client Certificates */ |
429 | if (x != NULL) | |
430 | return 1; | |
431 | ||
ab83e314 MC |
432 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signed_certificate_timestamp) |
433 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 434 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SCT, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
435 | return 0; |
436 | } | |
437 | ||
438 | return 1; | |
439 | } | |
440 | #endif | |
441 | ||
61138358 MC |
442 | int tls_construct_ctos_ems(SSL *s, WPACKET *pkt, unsigned int context, X509 *x, |
443 | size_t chainidx, int *al) | |
ab83e314 MC |
444 | { |
445 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret) | |
446 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 447 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EMS, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
448 | return 0; |
449 | } | |
450 | ||
451 | return 1; | |
452 | } | |
453 | ||
61138358 MC |
454 | int tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt, |
455 | unsigned int context, X509 *x, | |
8521ced6 | 456 | size_t chainidx, int *al) |
ab83e314 MC |
457 | { |
458 | int currv, min_version, max_version, reason; | |
459 | ||
460 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_versions) | |
461 | || !WPACKET_start_sub_packet_u16(pkt) | |
462 | || !WPACKET_start_sub_packet_u8(pkt)) { | |
7fe97c07 | 463 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, |
ab83e314 MC |
464 | ERR_R_INTERNAL_ERROR); |
465 | return 0; | |
466 | } | |
467 | ||
468 | reason = ssl_get_client_min_max_version(s, &min_version, &max_version); | |
469 | if (reason != 0) { | |
7fe97c07 | 470 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, reason); |
ab83e314 MC |
471 | return 0; |
472 | } | |
473 | ||
474 | /* | |
475 | * TODO(TLS1.3): There is some discussion on the TLS list as to wheter | |
476 | * we should include versions <TLS1.2. For the moment we do. To be | |
477 | * reviewed later. | |
478 | */ | |
479 | for (currv = max_version; currv >= min_version; currv--) { | |
480 | /* TODO(TLS1.3): Remove this first if clause prior to release!! */ | |
481 | if (currv == TLS1_3_VERSION) { | |
482 | if (!WPACKET_put_bytes_u16(pkt, TLS1_3_VERSION_DRAFT)) { | |
7fe97c07 | 483 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, |
ab83e314 MC |
484 | ERR_R_INTERNAL_ERROR); |
485 | return 0; | |
486 | } | |
487 | } else if (!WPACKET_put_bytes_u16(pkt, currv)) { | |
7fe97c07 | 488 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, |
ab83e314 MC |
489 | ERR_R_INTERNAL_ERROR); |
490 | return 0; | |
491 | } | |
492 | } | |
493 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
7fe97c07 | 494 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, |
ab83e314 MC |
495 | ERR_R_INTERNAL_ERROR); |
496 | return 0; | |
497 | } | |
498 | ||
499 | return 1; | |
500 | } | |
501 | ||
b2f7e8c0 MC |
502 | /* |
503 | * Construct a psk_kex_modes extension. We only have two modes we know about | |
504 | * at this stage, so we send both. | |
505 | */ | |
61138358 MC |
506 | int tls_construct_ctos_psk_kex_modes(SSL *s, WPACKET *pkt, unsigned int context, |
507 | X509 *x, size_t chainidx, int *al) | |
b2f7e8c0 MC |
508 | { |
509 | #ifndef OPENSSL_NO_TLS1_3 | |
510 | /* | |
511 | * TODO(TLS1.3): Do we want this list to be configurable? For now we always | |
512 | * just send both supported modes | |
513 | */ | |
514 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk_kex_modes) | |
515 | || !WPACKET_start_sub_packet_u16(pkt) | |
516 | || !WPACKET_start_sub_packet_u8(pkt) | |
517 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE_DHE) | |
518 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE) | |
519 | || !WPACKET_close(pkt) | |
520 | || !WPACKET_close(pkt)) { | |
521 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK_KEX_MODES, ERR_R_INTERNAL_ERROR); | |
522 | return 0; | |
523 | } | |
b3ad72ce MC |
524 | |
525 | s->ext.psk_kex_mode = TLSEXT_KEX_MODE_FLAG_KE | TLSEXT_KEX_MODE_FLAG_KE_DHE; | |
b2f7e8c0 MC |
526 | #endif |
527 | ||
528 | return 1; | |
529 | } | |
530 | ||
3847d426 MC |
531 | #ifndef OPENSSL_NO_TLS1_3 |
532 | static int add_key_share(SSL *s, WPACKET *pkt, unsigned int curve_id) | |
533 | { | |
2248dbeb MC |
534 | unsigned char *encoded_point; |
535 | EVP_PKEY *key_share_key; | |
3847d426 MC |
536 | size_t encodedlen; |
537 | ||
538 | key_share_key = ssl_generate_pkey_curve(curve_id); | |
539 | if (key_share_key == NULL) { | |
540 | SSLerr(SSL_F_ADD_KEY_SHARE, ERR_R_EVP_LIB); | |
541 | return 0; | |
542 | } | |
543 | ||
544 | /* Encode the public key. */ | |
545 | encodedlen = EVP_PKEY_get1_tls_encodedpoint(key_share_key, | |
2248dbeb | 546 | &encoded_point); |
3847d426 MC |
547 | if (encodedlen == 0) { |
548 | SSLerr(SSL_F_ADD_KEY_SHARE, ERR_R_EC_LIB); | |
549 | EVP_PKEY_free(key_share_key); | |
550 | return 0; | |
551 | } | |
552 | ||
553 | /* Create KeyShareEntry */ | |
554 | if (!WPACKET_put_bytes_u16(pkt, curve_id) | |
2248dbeb | 555 | || !WPACKET_sub_memcpy_u16(pkt, encoded_point, encodedlen)) { |
3847d426 MC |
556 | SSLerr(SSL_F_ADD_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
557 | EVP_PKEY_free(key_share_key); | |
2248dbeb | 558 | OPENSSL_free(encoded_point); |
3847d426 MC |
559 | return 0; |
560 | } | |
561 | ||
562 | /* | |
563 | * TODO(TLS1.3): When changing to send more than one key_share we're | |
564 | * going to need to be able to save more than one EVP_PKEY. For now | |
565 | * we reuse the existing tmp.pkey | |
566 | */ | |
567 | s->s3->tmp.pkey = key_share_key; | |
568 | s->s3->group_id = curve_id; | |
2248dbeb | 569 | OPENSSL_free(encoded_point); |
3847d426 MC |
570 | |
571 | return 1; | |
572 | } | |
573 | #endif | |
574 | ||
61138358 MC |
575 | int tls_construct_ctos_key_share(SSL *s, WPACKET *pkt, unsigned int context, |
576 | X509 *x, size_t chainidx, int *al) | |
ab83e314 | 577 | { |
3cf96e88 | 578 | #ifndef OPENSSL_NO_TLS1_3 |
3847d426 | 579 | size_t i, num_curves = 0; |
ab83e314 | 580 | const unsigned char *pcurves = NULL; |
3847d426 | 581 | unsigned int curve_id = 0; |
ab83e314 MC |
582 | |
583 | /* key_share extension */ | |
584 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
585 | /* Extension data sub-packet */ | |
586 | || !WPACKET_start_sub_packet_u16(pkt) | |
587 | /* KeyShare list sub-packet */ | |
588 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 589 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
590 | return 0; |
591 | } | |
592 | ||
aff8c126 | 593 | pcurves = s->ext.supportedgroups; |
ab83e314 | 594 | if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) { |
7fe97c07 | 595 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
596 | return 0; |
597 | } | |
598 | ||
3847d426 MC |
599 | if (s->s3->tmp.pkey != NULL) { |
600 | /* Shouldn't happen! */ | |
601 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); | |
602 | return 0; | |
603 | } | |
604 | ||
ab83e314 MC |
605 | /* |
606 | * TODO(TLS1.3): Make the number of key_shares sent configurable. For | |
607 | * now, just send one | |
608 | */ | |
3847d426 MC |
609 | if (s->s3->group_id != 0) { |
610 | curve_id = s->s3->group_id; | |
611 | } else { | |
612 | for (i = 0; i < num_curves; i++, pcurves += 2) { | |
ab83e314 | 613 | |
3847d426 MC |
614 | if (!tls_curve_allowed(s, pcurves, SSL_SECOP_CURVE_SUPPORTED)) |
615 | continue; | |
ab83e314 | 616 | |
0dd7ba24 | 617 | curve_id = bytestogroup(pcurves); |
3847d426 | 618 | break; |
ab83e314 | 619 | } |
3847d426 | 620 | } |
ab83e314 | 621 | |
3847d426 MC |
622 | if (curve_id == 0) { |
623 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, SSL_R_NO_SUITABLE_KEY_SHARE); | |
624 | return 0; | |
ab83e314 MC |
625 | } |
626 | ||
3847d426 MC |
627 | if (!add_key_share(s, pkt, curve_id)) |
628 | return 0; | |
629 | ||
ab83e314 | 630 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { |
7fe97c07 | 631 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
632 | return 0; |
633 | } | |
3cf96e88 | 634 | #endif |
ab83e314 MC |
635 | |
636 | return 1; | |
637 | } | |
638 | ||
1266eefd MC |
639 | #define F5_WORKAROUND_MIN_MSG_LEN 0xff |
640 | #define F5_WORKAROUND_MAX_MSG_LEN 0x200 | |
641 | ||
61138358 MC |
642 | int tls_construct_ctos_padding(SSL *s, WPACKET *pkt, unsigned int context, |
643 | X509 *x, size_t chainidx, int *al) | |
ab83e314 MC |
644 | { |
645 | unsigned char *padbytes; | |
646 | size_t hlen; | |
647 | ||
648 | if ((s->options & SSL_OP_TLSEXT_PADDING) == 0) | |
649 | return 1; | |
650 | ||
651 | /* | |
652 | * Add padding to workaround bugs in F5 terminators. See | |
653 | * https://tools.ietf.org/html/draft-agl-tls-padding-03 NB: because this | |
1266eefd | 654 | * code calculates the length of all existing extensions it MUST always |
ab83e314 MC |
655 | * appear last. |
656 | */ | |
657 | if (!WPACKET_get_total_written(pkt, &hlen)) { | |
7fe97c07 | 658 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
659 | return 0; |
660 | } | |
661 | ||
1266eefd MC |
662 | if (hlen > F5_WORKAROUND_MIN_MSG_LEN && hlen < F5_WORKAROUND_MAX_MSG_LEN) { |
663 | /* Calculate the amond of padding we need to add */ | |
664 | hlen = F5_WORKAROUND_MAX_MSG_LEN - hlen; | |
665 | ||
666 | /* | |
667 | * Take off the size of extension header itself (2 bytes for type and | |
668 | * 2 bytes for length bytes) | |
669 | */ | |
ab83e314 MC |
670 | if (hlen >= 4) |
671 | hlen -= 4; | |
672 | else | |
673 | hlen = 0; | |
674 | ||
675 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_padding) | |
676 | || !WPACKET_sub_allocate_bytes_u16(pkt, hlen, &padbytes)) { | |
7fe97c07 | 677 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
678 | return 0; |
679 | } | |
680 | memset(padbytes, 0, hlen); | |
681 | } | |
682 | ||
683 | return 1; | |
684 | } | |
685 | ||
ec15acb6 MC |
686 | /* |
687 | * Construct the pre_shared_key extension | |
688 | */ | |
61138358 MC |
689 | int tls_construct_ctos_psk(SSL *s, WPACKET *pkt, unsigned int context, X509 *x, |
690 | size_t chainidx, int *al) | |
ec15acb6 MC |
691 | { |
692 | #ifndef OPENSSL_NO_TLS1_3 | |
40f805ad | 693 | uint32_t now, agesec, agems; |
1053a6e2 | 694 | size_t hashsize, binderoffset, msglen; |
ec15acb6 | 695 | unsigned char *binder = NULL, *msgstart = NULL; |
ec15acb6 | 696 | const EVP_MD *md; |
ec15acb6 MC |
697 | int ret = 0; |
698 | ||
699 | s->session->ext.tick_identity = TLSEXT_PSK_BAD_IDENTITY; | |
700 | ||
701 | /* | |
08191294 MC |
702 | * If this is an incompatible or new session then we have nothing to resume |
703 | * so don't add this extension. | |
ec15acb6 | 704 | */ |
08191294 MC |
705 | if (s->session->ssl_version != TLS1_3_VERSION |
706 | || s->session->ext.ticklen == 0) | |
ec15acb6 MC |
707 | return 1; |
708 | ||
40f805ad MC |
709 | if (s->session->cipher == NULL) { |
710 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR); | |
711 | goto err; | |
712 | } | |
713 | ||
1f5b44e9 MC |
714 | md = ssl_md(s->session->cipher->algorithm2); |
715 | if (md == NULL) { | |
716 | /* Don't recognise this cipher so we can't use the session. Ignore it */ | |
717 | return 1; | |
718 | } | |
719 | ||
ec15acb6 MC |
720 | /* |
721 | * Technically the C standard just says time() returns a time_t and says | |
722 | * nothing about the encoding of that type. In practice most implementations | |
723 | * follow POSIX which holds it as an integral type in seconds since epoch. | |
724 | * We've already made the assumption that we can do this in multiple places | |
725 | * in the code, so portability shouldn't be an issue. | |
726 | */ | |
727 | now = (uint32_t)time(NULL); | |
40f805ad | 728 | agesec = now - (uint32_t)s->session->time; |
ec15acb6 | 729 | |
40f805ad | 730 | if (s->session->ext.tick_lifetime_hint < agesec) { |
fc24f0bf MC |
731 | /* Ticket is too old. Ignore it. */ |
732 | return 1; | |
733 | } | |
734 | ||
ec15acb6 MC |
735 | /* |
736 | * Calculate age in ms. We're just doing it to nearest second. Should be | |
737 | * good enough. | |
738 | */ | |
40f805ad | 739 | agems = agesec * (uint32_t)1000; |
ec15acb6 | 740 | |
40f805ad | 741 | if (agesec != 0 && agems / (uint32_t)1000 != agesec) { |
ec15acb6 MC |
742 | /* |
743 | * Overflow. Shouldn't happen unless this is a *really* old session. If | |
744 | * so we just ignore it. | |
745 | */ | |
746 | return 1; | |
747 | } | |
748 | ||
fc24f0bf MC |
749 | /* |
750 | * Obfuscate the age. Overflow here is fine, this addition is supposed to | |
751 | * be mod 2^32. | |
752 | */ | |
753 | agems += s->session->ext.tick_age_add; | |
ec15acb6 | 754 | |
ec15acb6 MC |
755 | hashsize = EVP_MD_size(md); |
756 | ||
757 | /* Create the extension, but skip over the binder for now */ | |
758 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk) | |
759 | || !WPACKET_start_sub_packet_u16(pkt) | |
760 | || !WPACKET_start_sub_packet_u16(pkt) | |
761 | || !WPACKET_sub_memcpy_u16(pkt, s->session->ext.tick, | |
762 | s->session->ext.ticklen) | |
763 | || !WPACKET_put_bytes_u32(pkt, agems) | |
764 | || !WPACKET_close(pkt) | |
765 | || !WPACKET_get_total_written(pkt, &binderoffset) | |
766 | || !WPACKET_start_sub_packet_u16(pkt) | |
767 | || !WPACKET_sub_allocate_bytes_u8(pkt, hashsize, &binder) | |
768 | || !WPACKET_close(pkt) | |
769 | || !WPACKET_close(pkt) | |
770 | || !WPACKET_get_total_written(pkt, &msglen) | |
771 | /* | |
772 | * We need to fill in all the sub-packet lengths now so we can | |
773 | * calculate the HMAC of the message up to the binders | |
774 | */ | |
775 | || !WPACKET_fill_lengths(pkt)) { | |
776 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR); | |
777 | goto err; | |
778 | } | |
779 | ||
780 | msgstart = WPACKET_get_curr(pkt) - msglen; | |
781 | ||
1053a6e2 MC |
782 | if (tls_psk_do_binder(s, md, msgstart, binderoffset, NULL, binder, |
783 | s->session, 1) != 1) { | |
ec15acb6 MC |
784 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR); |
785 | goto err; | |
786 | } | |
787 | ||
788 | s->session->ext.tick_identity = 0; | |
789 | ||
790 | ret = 1; | |
791 | err: | |
ec15acb6 MC |
792 | return ret; |
793 | #else | |
794 | return 1; | |
795 | #endif | |
796 | } | |
797 | ||
6dd083fd MC |
798 | /* |
799 | * Parse the server's renegotiation binding and abort if it's not right | |
800 | */ | |
61138358 MC |
801 | int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, unsigned int context, |
802 | X509 *x, size_t chainidx, int *al) | |
6dd083fd MC |
803 | { |
804 | size_t expected_len = s->s3->previous_client_finished_len | |
805 | + s->s3->previous_server_finished_len; | |
806 | size_t ilen; | |
807 | const unsigned char *data; | |
808 | ||
809 | /* Check for logic errors */ | |
810 | assert(expected_len == 0 || s->s3->previous_client_finished_len != 0); | |
811 | assert(expected_len == 0 || s->s3->previous_server_finished_len != 0); | |
812 | ||
813 | /* Parse the length byte */ | |
814 | if (!PACKET_get_1_len(pkt, &ilen)) { | |
7fe97c07 | 815 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
816 | SSL_R_RENEGOTIATION_ENCODING_ERR); |
817 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
818 | return 0; | |
819 | } | |
820 | ||
821 | /* Consistency check */ | |
822 | if (PACKET_remaining(pkt) != ilen) { | |
7fe97c07 | 823 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
824 | SSL_R_RENEGOTIATION_ENCODING_ERR); |
825 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
826 | return 0; | |
827 | } | |
828 | ||
829 | /* Check that the extension matches */ | |
830 | if (ilen != expected_len) { | |
7fe97c07 | 831 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
832 | SSL_R_RENEGOTIATION_MISMATCH); |
833 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
834 | return 0; | |
835 | } | |
836 | ||
837 | if (!PACKET_get_bytes(pkt, &data, s->s3->previous_client_finished_len) | |
838 | || memcmp(data, s->s3->previous_client_finished, | |
839 | s->s3->previous_client_finished_len) != 0) { | |
7fe97c07 | 840 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
841 | SSL_R_RENEGOTIATION_MISMATCH); |
842 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
843 | return 0; | |
844 | } | |
845 | ||
846 | if (!PACKET_get_bytes(pkt, &data, s->s3->previous_server_finished_len) | |
847 | || memcmp(data, s->s3->previous_server_finished, | |
848 | s->s3->previous_server_finished_len) != 0) { | |
7fe97c07 | 849 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
850 | SSL_R_RENEGOTIATION_MISMATCH); |
851 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
852 | return 0; | |
853 | } | |
854 | s->s3->send_connection_binding = 1; | |
855 | ||
856 | return 1; | |
857 | } | |
858 | ||
61138358 MC |
859 | int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, unsigned int context, |
860 | X509 *x, size_t chainidx, int *al) | |
6dd083fd | 861 | { |
aff8c126 | 862 | if (s->ext.hostname == NULL || PACKET_remaining(pkt) > 0) { |
6dd083fd MC |
863 | *al = SSL_AD_UNRECOGNIZED_NAME; |
864 | return 0; | |
865 | } | |
866 | ||
867 | if (!s->hit) { | |
aff8c126 | 868 | if (s->session->ext.hostname != NULL) { |
6dd083fd MC |
869 | *al = SSL_AD_INTERNAL_ERROR; |
870 | return 0; | |
871 | } | |
aff8c126 RS |
872 | s->session->ext.hostname = OPENSSL_strdup(s->ext.hostname); |
873 | if (s->session->ext.hostname == NULL) { | |
6dd083fd MC |
874 | *al = SSL_AD_INTERNAL_ERROR; |
875 | return 0; | |
876 | } | |
877 | } | |
878 | ||
879 | return 1; | |
880 | } | |
881 | ||
882 | #ifndef OPENSSL_NO_EC | |
61138358 MC |
883 | int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context, |
884 | X509 *x, size_t chainidx, int *al) | |
6dd083fd | 885 | { |
aff8c126 | 886 | unsigned int ecpointformats_len; |
6dd083fd MC |
887 | PACKET ecptformatlist; |
888 | ||
889 | if (!PACKET_as_length_prefixed_1(pkt, &ecptformatlist)) { | |
890 | *al = SSL_AD_DECODE_ERROR; | |
891 | return 0; | |
892 | } | |
893 | if (!s->hit) { | |
aff8c126 RS |
894 | ecpointformats_len = PACKET_remaining(&ecptformatlist); |
895 | s->session->ext.ecpointformats_len = 0; | |
6dd083fd | 896 | |
aff8c126 RS |
897 | OPENSSL_free(s->session->ext.ecpointformats); |
898 | s->session->ext.ecpointformats = OPENSSL_malloc(ecpointformats_len); | |
899 | if (s->session->ext.ecpointformats == NULL) { | |
6dd083fd MC |
900 | *al = SSL_AD_INTERNAL_ERROR; |
901 | return 0; | |
902 | } | |
903 | ||
aff8c126 | 904 | s->session->ext.ecpointformats_len = ecpointformats_len; |
6dd083fd MC |
905 | |
906 | if (!PACKET_copy_bytes(&ecptformatlist, | |
aff8c126 RS |
907 | s->session->ext.ecpointformats, |
908 | ecpointformats_len)) { | |
6dd083fd MC |
909 | *al = SSL_AD_INTERNAL_ERROR; |
910 | return 0; | |
911 | } | |
912 | } | |
913 | ||
914 | return 1; | |
915 | } | |
916 | #endif | |
917 | ||
61138358 MC |
918 | int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, unsigned int context, |
919 | X509 *x, size_t chainidx, int *al) | |
6dd083fd | 920 | { |
aff8c126 RS |
921 | if (s->ext.session_ticket_cb != NULL && |
922 | !s->ext.session_ticket_cb(s, PACKET_data(pkt), | |
923 | PACKET_remaining(pkt), | |
924 | s->ext.session_ticket_cb_arg)) { | |
6dd083fd MC |
925 | *al = SSL_AD_INTERNAL_ERROR; |
926 | return 0; | |
927 | } | |
1266eefd | 928 | |
6dd083fd MC |
929 | if (!tls_use_ticket(s) || PACKET_remaining(pkt) > 0) { |
930 | *al = SSL_AD_UNSUPPORTED_EXTENSION; | |
931 | return 0; | |
932 | } | |
1266eefd | 933 | |
aff8c126 | 934 | s->ext.ticket_expected = 1; |
6dd083fd MC |
935 | |
936 | return 1; | |
937 | } | |
938 | ||
ab83e314 | 939 | #ifndef OPENSSL_NO_OCSP |
61138358 MC |
940 | int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, unsigned int context, |
941 | X509 *x, size_t chainidx, int *al) | |
6dd083fd MC |
942 | { |
943 | /* | |
f63e4288 MC |
944 | * MUST only be sent if we've requested a status |
945 | * request message. In TLS <= 1.2 it must also be empty. | |
6dd083fd | 946 | */ |
aff8c126 | 947 | if (s->ext.status_type == TLSEXT_STATUSTYPE_nothing |
f63e4288 | 948 | || (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) > 0)) { |
6dd083fd MC |
949 | *al = SSL_AD_UNSUPPORTED_EXTENSION; |
950 | return 0; | |
951 | } | |
f63e4288 MC |
952 | |
953 | if (SSL_IS_TLS13(s)) { | |
954 | /* We only know how to handle this if it's for the first Certificate in | |
955 | * the chain. We ignore any other repsonses. | |
956 | */ | |
8521ced6 | 957 | if (chainidx != 0) |
f63e4288 MC |
958 | return 1; |
959 | return tls_process_cert_status_body(s, pkt, al); | |
960 | } | |
961 | ||
6dd083fd | 962 | /* Set flag to expect CertificateStatus message */ |
aff8c126 | 963 | s->ext.status_expected = 1; |
6dd083fd MC |
964 | |
965 | return 1; | |
966 | } | |
ab83e314 | 967 | #endif |
6dd083fd MC |
968 | |
969 | ||
970 | #ifndef OPENSSL_NO_CT | |
61138358 MC |
971 | int tls_parse_stoc_sct(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
972 | size_t chainidx, int *al) | |
6dd083fd MC |
973 | { |
974 | /* | |
975 | * Only take it if we asked for it - i.e if there is no CT validation | |
976 | * callback set, then a custom extension MAY be processing it, so we | |
977 | * need to let control continue to flow to that. | |
978 | */ | |
979 | if (s->ct_validation_callback != NULL) { | |
980 | size_t size = PACKET_remaining(pkt); | |
981 | ||
982 | /* Simply copy it off for later processing */ | |
aff8c126 RS |
983 | OPENSSL_free(s->ext.scts); |
984 | s->ext.scts = NULL; | |
1266eefd | 985 | |
aff8c126 | 986 | s->ext.scts_len = size; |
6dd083fd | 987 | if (size > 0) { |
aff8c126 RS |
988 | s->ext.scts = OPENSSL_malloc(size); |
989 | if (s->ext.scts == NULL | |
990 | || !PACKET_copy_bytes(pkt, s->ext.scts, size)) { | |
6dd083fd MC |
991 | *al = SSL_AD_INTERNAL_ERROR; |
992 | return 0; | |
993 | } | |
994 | } | |
995 | } else { | |
996 | if (custom_ext_parse(s, 0, TLSEXT_TYPE_signed_certificate_timestamp, | |
997 | PACKET_data(pkt), PACKET_remaining(pkt), al) <= 0) | |
998 | return 0; | |
999 | } | |
1000 | ||
1001 | return 1; | |
1002 | } | |
1003 | #endif | |
1004 | ||
1005 | ||
1006 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
1007 | /* | |
1008 | * ssl_next_proto_validate validates a Next Protocol Negotiation block. No | |
1009 | * elements of zero length are allowed and the set of elements must exactly | |
1010 | * fill the length of the block. Returns 1 on success or 0 on failure. | |
1011 | */ | |
1012 | static int ssl_next_proto_validate(PACKET *pkt) | |
1013 | { | |
1014 | PACKET tmp_protocol; | |
1015 | ||
1016 | while (PACKET_remaining(pkt)) { | |
1017 | if (!PACKET_get_length_prefixed_1(pkt, &tmp_protocol) | |
1018 | || PACKET_remaining(&tmp_protocol) == 0) | |
1019 | return 0; | |
1020 | } | |
1021 | ||
1022 | return 1; | |
1023 | } | |
1024 | ||
61138358 MC |
1025 | int tls_parse_stoc_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1026 | size_t chainidx, int *al) | |
6dd083fd MC |
1027 | { |
1028 | unsigned char *selected; | |
1029 | unsigned char selected_len; | |
1030 | PACKET tmppkt; | |
1031 | ||
1266eefd | 1032 | /* Check if we are in a renegotiation. If so ignore this extension */ |
c7f47786 | 1033 | if (!SSL_IS_FIRST_HANDSHAKE(s)) |
6dd083fd MC |
1034 | return 1; |
1035 | ||
1036 | /* We must have requested it. */ | |
aff8c126 | 1037 | if (s->ctx->ext.npn_select_cb == NULL) { |
6dd083fd MC |
1038 | *al = SSL_AD_UNSUPPORTED_EXTENSION; |
1039 | return 0; | |
1040 | } | |
1266eefd | 1041 | |
6dd083fd MC |
1042 | /* The data must be valid */ |
1043 | tmppkt = *pkt; | |
1044 | if (!ssl_next_proto_validate(&tmppkt)) { | |
1045 | *al = SSL_AD_DECODE_ERROR; | |
1046 | return 0; | |
1047 | } | |
aff8c126 RS |
1048 | if (s->ctx->ext.npn_select_cb(s, &selected, &selected_len, |
1049 | PACKET_data(pkt), | |
1050 | PACKET_remaining(pkt), | |
1051 | s->ctx->ext.npn_select_cb_arg) != | |
6dd083fd MC |
1052 | SSL_TLSEXT_ERR_OK) { |
1053 | *al = SSL_AD_INTERNAL_ERROR; | |
1054 | return 0; | |
1055 | } | |
1266eefd | 1056 | |
6dd083fd MC |
1057 | /* |
1058 | * Could be non-NULL if server has sent multiple NPN extensions in | |
1059 | * a single Serverhello | |
1060 | */ | |
aff8c126 RS |
1061 | OPENSSL_free(s->ext.npn); |
1062 | s->ext.npn = OPENSSL_malloc(selected_len); | |
1063 | if (s->ext.npn == NULL) { | |
6dd083fd MC |
1064 | *al = SSL_AD_INTERNAL_ERROR; |
1065 | return 0; | |
1066 | } | |
1067 | ||
aff8c126 RS |
1068 | memcpy(s->ext.npn, selected, selected_len); |
1069 | s->ext.npn_len = selected_len; | |
1070 | s->s3->npn_seen = 1; | |
6dd083fd MC |
1071 | |
1072 | return 1; | |
1073 | } | |
1074 | #endif | |
1075 | ||
61138358 MC |
1076 | int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1077 | size_t chainidx, int *al) | |
6dd083fd MC |
1078 | { |
1079 | size_t len; | |
1080 | ||
1081 | /* We must have requested it. */ | |
1082 | if (!s->s3->alpn_sent) { | |
1083 | *al = SSL_AD_UNSUPPORTED_EXTENSION; | |
1084 | return 0; | |
1085 | } | |
1086 | /*- | |
1087 | * The extension data consists of: | |
1088 | * uint16 list_length | |
1089 | * uint8 proto_length; | |
1090 | * uint8 proto[proto_length]; | |
1091 | */ | |
1092 | if (!PACKET_get_net_2_len(pkt, &len) | |
1093 | || PACKET_remaining(pkt) != len || !PACKET_get_1_len(pkt, &len) | |
1094 | || PACKET_remaining(pkt) != len) { | |
1095 | *al = SSL_AD_DECODE_ERROR; | |
1096 | return 0; | |
1097 | } | |
1098 | OPENSSL_free(s->s3->alpn_selected); | |
1099 | s->s3->alpn_selected = OPENSSL_malloc(len); | |
1100 | if (s->s3->alpn_selected == NULL) { | |
1101 | *al = SSL_AD_INTERNAL_ERROR; | |
1102 | return 0; | |
1103 | } | |
1104 | if (!PACKET_copy_bytes(pkt, s->s3->alpn_selected, len)) { | |
1105 | *al = SSL_AD_DECODE_ERROR; | |
1106 | return 0; | |
1107 | } | |
1108 | s->s3->alpn_selected_len = len; | |
1109 | ||
1110 | return 1; | |
1111 | } | |
1112 | ||
1113 | #ifndef OPENSSL_NO_SRTP | |
61138358 MC |
1114 | int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1115 | size_t chainidx, int *al) | |
6dd083fd MC |
1116 | { |
1117 | unsigned int id, ct, mki; | |
1118 | int i; | |
1119 | STACK_OF(SRTP_PROTECTION_PROFILE) *clnt; | |
1120 | SRTP_PROTECTION_PROFILE *prof; | |
1121 | ||
1266eefd MC |
1122 | if (!PACKET_get_net_2(pkt, &ct) || ct != 2 |
1123 | || !PACKET_get_net_2(pkt, &id) | |
1124 | || !PACKET_get_1(pkt, &mki) | |
1125 | || PACKET_remaining(pkt) != 0) { | |
7fe97c07 | 1126 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, |
6dd083fd MC |
1127 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
1128 | *al = SSL_AD_DECODE_ERROR; | |
1129 | return 0; | |
1130 | } | |
1131 | ||
1132 | if (mki != 0) { | |
1133 | /* Must be no MKI, since we never offer one */ | |
7fe97c07 | 1134 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, SSL_R_BAD_SRTP_MKI_VALUE); |
6dd083fd MC |
1135 | *al = SSL_AD_ILLEGAL_PARAMETER; |
1136 | return 0; | |
1137 | } | |
1138 | ||
6dd083fd | 1139 | /* Throw an error if the server gave us an unsolicited extension */ |
1266eefd | 1140 | clnt = SSL_get_srtp_profiles(s); |
6dd083fd | 1141 | if (clnt == NULL) { |
7fe97c07 | 1142 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, SSL_R_NO_SRTP_PROFILES); |
6dd083fd MC |
1143 | *al = SSL_AD_DECODE_ERROR; |
1144 | return 0; | |
1145 | } | |
1146 | ||
1147 | /* | |
1148 | * Check to see if the server gave us something we support (and | |
1149 | * presumably offered) | |
1150 | */ | |
1151 | for (i = 0; i < sk_SRTP_PROTECTION_PROFILE_num(clnt); i++) { | |
1152 | prof = sk_SRTP_PROTECTION_PROFILE_value(clnt, i); | |
1153 | ||
1154 | if (prof->id == id) { | |
1155 | s->srtp_profile = prof; | |
1156 | *al = 0; | |
1157 | return 1; | |
1158 | } | |
1159 | } | |
1160 | ||
7fe97c07 | 1161 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, |
6dd083fd MC |
1162 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
1163 | *al = SSL_AD_DECODE_ERROR; | |
1164 | return 0; | |
1165 | } | |
1166 | #endif | |
1167 | ||
61138358 MC |
1168 | int tls_parse_stoc_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1169 | size_t chainidx, int *al) | |
6dd083fd MC |
1170 | { |
1171 | /* Ignore if inappropriate ciphersuite */ | |
1172 | if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC) | |
1173 | && s->s3->tmp.new_cipher->algorithm_mac != SSL_AEAD | |
1174 | && s->s3->tmp.new_cipher->algorithm_enc != SSL_RC4) | |
1175 | s->s3->flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC; | |
1176 | ||
1177 | return 1; | |
1178 | } | |
1179 | ||
61138358 MC |
1180 | int tls_parse_stoc_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1181 | size_t chainidx, int *al) | |
6dd083fd MC |
1182 | { |
1183 | s->s3->flags |= TLS1_FLAGS_RECEIVED_EXTMS; | |
1184 | if (!s->hit) | |
1185 | s->session->flags |= SSL_SESS_FLAG_EXTMS; | |
1186 | ||
1187 | return 1; | |
1188 | } | |
1189 | ||
61138358 MC |
1190 | int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1191 | size_t chainidx, int *al) | |
6dd083fd | 1192 | { |
3cf96e88 | 1193 | #ifndef OPENSSL_NO_TLS1_3 |
6dd083fd MC |
1194 | unsigned int group_id; |
1195 | PACKET encoded_pt; | |
1196 | EVP_PKEY *ckey = s->s3->tmp.pkey, *skey = NULL; | |
1197 | ||
1198 | /* Sanity check */ | |
1199 | if (ckey == NULL) { | |
1200 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 1201 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1202 | return 0; |
1203 | } | |
1204 | ||
1205 | if (!PACKET_get_net_2(pkt, &group_id)) { | |
1206 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
7fe97c07 | 1207 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_LENGTH_MISMATCH); |
6dd083fd MC |
1208 | return 0; |
1209 | } | |
1210 | ||
3847d426 MC |
1211 | if ((context & EXT_TLS1_3_HELLO_RETRY_REQUEST) != 0) { |
1212 | unsigned const char *pcurves = NULL; | |
1213 | size_t i, num_curves; | |
1214 | ||
1215 | if (PACKET_remaining(pkt) != 0) { | |
1216 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
1217 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_LENGTH_MISMATCH); | |
1218 | return 0; | |
1219 | } | |
1220 | ||
1221 | /* | |
1222 | * It is an error if the HelloRetryRequest wants a key_share that we | |
1223 | * already sent in the first ClientHello | |
1224 | */ | |
1225 | if (group_id == s->s3->group_id) { | |
1226 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
1227 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE); | |
1228 | return 0; | |
1229 | } | |
1230 | ||
1231 | /* Validate the selected group is one we support */ | |
1232 | pcurves = s->ext.supportedgroups; | |
1233 | if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) { | |
1234 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); | |
1235 | return 0; | |
1236 | } | |
1237 | for (i = 0; i < num_curves; i++, pcurves += 2) { | |
0dd7ba24 | 1238 | if (group_id == bytestogroup(pcurves)) |
3847d426 MC |
1239 | break; |
1240 | } | |
1241 | if (i >= num_curves | |
1242 | || !tls_curve_allowed(s, pcurves, SSL_SECOP_CURVE_SUPPORTED)) { | |
1243 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
1244 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE); | |
1245 | return 0; | |
1246 | } | |
1247 | ||
1248 | s->s3->group_id = group_id; | |
1249 | EVP_PKEY_free(s->s3->tmp.pkey); | |
1250 | s->s3->tmp.pkey = NULL; | |
1251 | return 1; | |
1252 | } | |
1253 | ||
6dd083fd MC |
1254 | if (group_id != s->s3->group_id) { |
1255 | /* | |
1256 | * This isn't for the group that we sent in the original | |
1257 | * key_share! | |
1258 | */ | |
1259 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
7fe97c07 | 1260 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE); |
6dd083fd MC |
1261 | return 0; |
1262 | } | |
1263 | ||
1264 | if (!PACKET_as_length_prefixed_2(pkt, &encoded_pt) | |
1265 | || PACKET_remaining(&encoded_pt) == 0) { | |
1266 | *al = SSL_AD_DECODE_ERROR; | |
7fe97c07 | 1267 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_LENGTH_MISMATCH); |
6dd083fd MC |
1268 | return 0; |
1269 | } | |
1270 | ||
1271 | skey = ssl_generate_pkey(ckey); | |
1272 | if (skey == NULL) { | |
1273 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 1274 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_MALLOC_FAILURE); |
6dd083fd MC |
1275 | return 0; |
1276 | } | |
1277 | if (!EVP_PKEY_set1_tls_encodedpoint(skey, PACKET_data(&encoded_pt), | |
1278 | PACKET_remaining(&encoded_pt))) { | |
1279 | *al = SSL_AD_DECODE_ERROR; | |
7fe97c07 | 1280 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_ECPOINT); |
a1d6a0b6 | 1281 | EVP_PKEY_free(skey); |
6dd083fd MC |
1282 | return 0; |
1283 | } | |
1284 | ||
1285 | if (ssl_derive(s, ckey, skey, 1) == 0) { | |
1286 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 1287 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1288 | EVP_PKEY_free(skey); |
1289 | return 0; | |
1290 | } | |
1291 | EVP_PKEY_free(skey); | |
3cf96e88 | 1292 | #endif |
6dd083fd MC |
1293 | |
1294 | return 1; | |
1295 | } | |
4ff65f77 | 1296 | |
61138358 MC |
1297 | int tls_parse_stoc_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1298 | size_t chainidx, int *al) | |
4ff65f77 MC |
1299 | { |
1300 | #ifndef OPENSSL_NO_TLS1_3 | |
1301 | unsigned int identity; | |
1302 | ||
1303 | if (!PACKET_get_net_2(pkt, &identity) || PACKET_remaining(pkt) != 0) { | |
1304 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
1305 | SSLerr(SSL_F_TLS_PARSE_STOC_PSK, SSL_R_LENGTH_MISMATCH); | |
1306 | return 0; | |
1307 | } | |
1308 | ||
1309 | if (s->session->ext.tick_identity != (int)identity) { | |
1310 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
1311 | SSLerr(SSL_F_TLS_PARSE_STOC_PSK, SSL_R_BAD_PSK_IDENTITY); | |
1312 | return 0; | |
1313 | } | |
1314 | ||
1315 | s->hit = 1; | |
1316 | #endif | |
1317 | ||
1318 | return 1; | |
1319 | } |