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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) | |
e0926ef4 | 105 | return 1; |
ab83e314 MC |
106 | } |
107 | ||
e0926ef4 | 108 | return 0; |
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 */ | |
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) { | |
7d061fce | 166 | if (tls_curve_allowed(s, pcurvestmp, SSL_SECOP_CURVE_SUPPORTED)) { |
ab83e314 MC |
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 | ||
61138358 MC |
185 | int tls_construct_ctos_session_ticket(SSL *s, WPACKET *pkt, |
186 | unsigned int context, X509 *x, | |
8521ced6 | 187 | size_t chainidx, int *al) |
ab83e314 MC |
188 | { |
189 | size_t ticklen; | |
190 | ||
191 | if (!tls_use_ticket(s)) | |
192 | return 1; | |
193 | ||
194 | if (!s->new_session && s->session != NULL | |
08191294 MC |
195 | && s->session->ext.tick != NULL |
196 | && s->session->ssl_version != TLS1_3_VERSION) { | |
aff8c126 RS |
197 | ticklen = s->session->ext.ticklen; |
198 | } else if (s->session && s->ext.session_ticket != NULL | |
199 | && s->ext.session_ticket->data != NULL) { | |
200 | ticklen = s->ext.session_ticket->length; | |
201 | s->session->ext.tick = OPENSSL_malloc(ticklen); | |
202 | if (s->session->ext.tick == NULL) { | |
7fe97c07 | 203 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET, |
ab83e314 MC |
204 | ERR_R_INTERNAL_ERROR); |
205 | return 0; | |
206 | } | |
aff8c126 RS |
207 | memcpy(s->session->ext.tick, |
208 | s->ext.session_ticket->data, ticklen); | |
209 | s->session->ext.ticklen = ticklen; | |
ab83e314 MC |
210 | } else { |
211 | ticklen = 0; | |
212 | } | |
213 | ||
aff8c126 RS |
214 | if (ticklen == 0 && s->ext.session_ticket != NULL && |
215 | s->ext.session_ticket->data == NULL) | |
ab83e314 MC |
216 | return 1; |
217 | ||
218 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket) | |
aff8c126 | 219 | || !WPACKET_sub_memcpy_u16(pkt, s->session->ext.tick, ticklen)) { |
7fe97c07 | 220 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
221 | return 0; |
222 | } | |
223 | ||
224 | return 1; | |
225 | } | |
226 | ||
61138358 MC |
227 | int tls_construct_ctos_sig_algs(SSL *s, WPACKET *pkt, unsigned int context, |
228 | X509 *x, size_t chainidx, int *al) | |
ab83e314 MC |
229 | { |
230 | size_t salglen; | |
98c792d1 | 231 | const uint16_t *salg; |
ab83e314 MC |
232 | |
233 | if (!SSL_CLIENT_USE_SIGALGS(s)) | |
234 | return 1; | |
235 | ||
a9669ddc | 236 | salglen = tls12_get_psigalgs(s, 1, &salg); |
ab83e314 MC |
237 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signature_algorithms) |
238 | /* Sub-packet for sig-algs extension */ | |
239 | || !WPACKET_start_sub_packet_u16(pkt) | |
240 | /* Sub-packet for the actual list */ | |
241 | || !WPACKET_start_sub_packet_u16(pkt) | |
242 | || !tls12_copy_sigalgs(s, pkt, salg, salglen) | |
243 | || !WPACKET_close(pkt) | |
244 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 245 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SIG_ALGS, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
246 | return 0; |
247 | } | |
248 | ||
249 | return 1; | |
250 | } | |
251 | ||
252 | #ifndef OPENSSL_NO_OCSP | |
61138358 MC |
253 | int tls_construct_ctos_status_request(SSL *s, WPACKET *pkt, |
254 | unsigned int context, X509 *x, | |
8521ced6 | 255 | size_t chainidx, int *al) |
ab83e314 MC |
256 | { |
257 | int i; | |
258 | ||
e96e0f8e MC |
259 | /* This extension isn't defined for client Certificates */ |
260 | if (x != NULL) | |
261 | return 1; | |
262 | ||
aff8c126 | 263 | if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) |
ab83e314 MC |
264 | return 1; |
265 | ||
266 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request) | |
267 | /* Sub-packet for status request extension */ | |
268 | || !WPACKET_start_sub_packet_u16(pkt) | |
269 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_STATUSTYPE_ocsp) | |
270 | /* Sub-packet for the ids */ | |
271 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 272 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
273 | return 0; |
274 | } | |
aff8c126 | 275 | for (i = 0; i < sk_OCSP_RESPID_num(s->ext.ocsp.ids); i++) { |
ab83e314 | 276 | unsigned char *idbytes; |
aff8c126 | 277 | OCSP_RESPID *id = sk_OCSP_RESPID_value(s->ext.ocsp.ids, i); |
1266eefd | 278 | int idlen = i2d_OCSP_RESPID(id, NULL); |
ab83e314 | 279 | |
ab83e314 MC |
280 | if (idlen <= 0 |
281 | /* Sub-packet for an individual id */ | |
282 | || !WPACKET_sub_allocate_bytes_u16(pkt, idlen, &idbytes) | |
283 | || i2d_OCSP_RESPID(id, &idbytes) != idlen) { | |
7fe97c07 | 284 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, |
ab83e314 MC |
285 | ERR_R_INTERNAL_ERROR); |
286 | return 0; | |
287 | } | |
288 | } | |
289 | if (!WPACKET_close(pkt) | |
290 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 291 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
292 | return 0; |
293 | } | |
aff8c126 | 294 | if (s->ext.ocsp.exts) { |
ab83e314 | 295 | unsigned char *extbytes; |
aff8c126 | 296 | int extlen = i2d_X509_EXTENSIONS(s->ext.ocsp.exts, NULL); |
ab83e314 MC |
297 | |
298 | if (extlen < 0) { | |
7fe97c07 | 299 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, |
ab83e314 MC |
300 | ERR_R_INTERNAL_ERROR); |
301 | return 0; | |
302 | } | |
303 | if (!WPACKET_allocate_bytes(pkt, extlen, &extbytes) | |
aff8c126 | 304 | || i2d_X509_EXTENSIONS(s->ext.ocsp.exts, &extbytes) |
ab83e314 | 305 | != extlen) { |
7fe97c07 | 306 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, |
ab83e314 MC |
307 | ERR_R_INTERNAL_ERROR); |
308 | return 0; | |
309 | } | |
310 | } | |
311 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
7fe97c07 | 312 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
313 | return 0; |
314 | } | |
315 | ||
316 | return 1; | |
317 | } | |
318 | #endif | |
319 | ||
320 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
61138358 MC |
321 | int tls_construct_ctos_npn(SSL *s, WPACKET *pkt, unsigned int context, X509 *x, |
322 | size_t chainidx, int *al) | |
ab83e314 | 323 | { |
c7f47786 | 324 | if (s->ctx->ext.npn_select_cb == NULL || !SSL_IS_FIRST_HANDSHAKE(s)) |
ab83e314 MC |
325 | return 1; |
326 | ||
327 | /* | |
328 | * The client advertises an empty extension to indicate its support | |
329 | * for Next Protocol Negotiation | |
330 | */ | |
331 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_next_proto_neg) | |
332 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 333 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_NPN, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
334 | return 0; |
335 | } | |
336 | ||
337 | return 1; | |
338 | } | |
339 | #endif | |
340 | ||
61138358 MC |
341 | int tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, unsigned int context, X509 *x, |
342 | size_t chainidx, int *al) | |
ab83e314 MC |
343 | { |
344 | s->s3->alpn_sent = 0; | |
345 | ||
c7f47786 | 346 | if (s->ext.alpn == NULL || !SSL_IS_FIRST_HANDSHAKE(s)) |
ab83e314 MC |
347 | return 1; |
348 | ||
349 | if (!WPACKET_put_bytes_u16(pkt, | |
350 | TLSEXT_TYPE_application_layer_protocol_negotiation) | |
351 | /* Sub-packet ALPN extension */ | |
352 | || !WPACKET_start_sub_packet_u16(pkt) | |
aff8c126 | 353 | || !WPACKET_sub_memcpy_u16(pkt, s->ext.alpn, s->ext.alpn_len) |
ab83e314 | 354 | || !WPACKET_close(pkt)) { |
7fe97c07 | 355 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ALPN, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
356 | return 0; |
357 | } | |
358 | s->s3->alpn_sent = 1; | |
359 | ||
360 | return 1; | |
361 | } | |
362 | ||
363 | ||
364 | #ifndef OPENSSL_NO_SRTP | |
61138358 MC |
365 | int tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt, unsigned int context, |
366 | X509 *x, size_t chainidx, int *al) | |
ab83e314 MC |
367 | { |
368 | STACK_OF(SRTP_PROTECTION_PROFILE) *clnt = SSL_get_srtp_profiles(s); | |
1266eefd | 369 | int i, end; |
ab83e314 MC |
370 | |
371 | if (clnt == NULL) | |
372 | return 1; | |
373 | ||
374 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp) | |
375 | /* Sub-packet for SRTP extension */ | |
376 | || !WPACKET_start_sub_packet_u16(pkt) | |
377 | /* Sub-packet for the protection profile list */ | |
378 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 379 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
380 | return 0; |
381 | } | |
1266eefd MC |
382 | |
383 | end = sk_SRTP_PROTECTION_PROFILE_num(clnt); | |
384 | for (i = 0; i < end; i++) { | |
385 | const SRTP_PROTECTION_PROFILE *prof = | |
386 | sk_SRTP_PROTECTION_PROFILE_value(clnt, i); | |
387 | ||
ab83e314 | 388 | if (prof == NULL || !WPACKET_put_bytes_u16(pkt, prof->id)) { |
7fe97c07 | 389 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
390 | return 0; |
391 | } | |
392 | } | |
393 | if (!WPACKET_close(pkt) | |
394 | /* Add an empty use_mki value */ | |
395 | || !WPACKET_put_bytes_u8(pkt, 0) | |
396 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 397 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
398 | return 0; |
399 | } | |
400 | ||
401 | return 1; | |
402 | } | |
403 | #endif | |
404 | ||
61138358 MC |
405 | int tls_construct_ctos_etm(SSL *s, WPACKET *pkt, unsigned int context, X509 *x, |
406 | size_t chainidx, int *al) | |
ab83e314 MC |
407 | { |
408 | if (s->options & SSL_OP_NO_ENCRYPT_THEN_MAC) | |
409 | return 1; | |
410 | ||
411 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac) | |
412 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 413 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ETM, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
414 | return 0; |
415 | } | |
416 | ||
417 | return 1; | |
418 | } | |
419 | ||
420 | #ifndef OPENSSL_NO_CT | |
61138358 MC |
421 | int tls_construct_ctos_sct(SSL *s, WPACKET *pkt, unsigned int context, X509 *x, |
422 | size_t chainidx, int *al) | |
ab83e314 MC |
423 | { |
424 | if (s->ct_validation_callback == NULL) | |
425 | return 1; | |
426 | ||
e96e0f8e MC |
427 | /* Not defined for client Certificates */ |
428 | if (x != NULL) | |
429 | return 1; | |
430 | ||
ab83e314 MC |
431 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signed_certificate_timestamp) |
432 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 433 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SCT, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
434 | return 0; |
435 | } | |
436 | ||
437 | return 1; | |
438 | } | |
439 | #endif | |
440 | ||
61138358 MC |
441 | int tls_construct_ctos_ems(SSL *s, WPACKET *pkt, unsigned int context, X509 *x, |
442 | size_t chainidx, int *al) | |
ab83e314 MC |
443 | { |
444 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret) | |
445 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 446 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EMS, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
447 | return 0; |
448 | } | |
449 | ||
450 | return 1; | |
451 | } | |
452 | ||
61138358 MC |
453 | int tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt, |
454 | unsigned int context, X509 *x, | |
8521ced6 | 455 | size_t chainidx, int *al) |
ab83e314 MC |
456 | { |
457 | int currv, min_version, max_version, reason; | |
458 | ||
459 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_versions) | |
460 | || !WPACKET_start_sub_packet_u16(pkt) | |
461 | || !WPACKET_start_sub_packet_u8(pkt)) { | |
7fe97c07 | 462 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, |
ab83e314 MC |
463 | ERR_R_INTERNAL_ERROR); |
464 | return 0; | |
465 | } | |
466 | ||
467 | reason = ssl_get_client_min_max_version(s, &min_version, &max_version); | |
468 | if (reason != 0) { | |
7fe97c07 | 469 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, reason); |
ab83e314 MC |
470 | return 0; |
471 | } | |
472 | ||
473 | /* | |
1ee4b98e | 474 | * TODO(TLS1.3): There is some discussion on the TLS list as to whether |
ab83e314 MC |
475 | * we should include versions <TLS1.2. For the moment we do. To be |
476 | * reviewed later. | |
477 | */ | |
478 | for (currv = max_version; currv >= min_version; currv--) { | |
479 | /* TODO(TLS1.3): Remove this first if clause prior to release!! */ | |
480 | if (currv == TLS1_3_VERSION) { | |
481 | if (!WPACKET_put_bytes_u16(pkt, TLS1_3_VERSION_DRAFT)) { | |
7fe97c07 | 482 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, |
ab83e314 MC |
483 | ERR_R_INTERNAL_ERROR); |
484 | return 0; | |
485 | } | |
486 | } else if (!WPACKET_put_bytes_u16(pkt, currv)) { | |
7fe97c07 | 487 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, |
ab83e314 MC |
488 | ERR_R_INTERNAL_ERROR); |
489 | return 0; | |
490 | } | |
491 | } | |
492 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
7fe97c07 | 493 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, |
ab83e314 MC |
494 | ERR_R_INTERNAL_ERROR); |
495 | return 0; | |
496 | } | |
497 | ||
498 | return 1; | |
499 | } | |
500 | ||
b2f7e8c0 MC |
501 | /* |
502 | * Construct a psk_kex_modes extension. We only have two modes we know about | |
503 | * at this stage, so we send both. | |
504 | */ | |
61138358 MC |
505 | int tls_construct_ctos_psk_kex_modes(SSL *s, WPACKET *pkt, unsigned int context, |
506 | X509 *x, size_t chainidx, int *al) | |
b2f7e8c0 MC |
507 | { |
508 | #ifndef OPENSSL_NO_TLS1_3 | |
509 | /* | |
510 | * TODO(TLS1.3): Do we want this list to be configurable? For now we always | |
511 | * just send both supported modes | |
512 | */ | |
513 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk_kex_modes) | |
514 | || !WPACKET_start_sub_packet_u16(pkt) | |
515 | || !WPACKET_start_sub_packet_u8(pkt) | |
516 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE_DHE) | |
517 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE) | |
518 | || !WPACKET_close(pkt) | |
519 | || !WPACKET_close(pkt)) { | |
520 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK_KEX_MODES, ERR_R_INTERNAL_ERROR); | |
521 | return 0; | |
522 | } | |
b3ad72ce MC |
523 | |
524 | s->ext.psk_kex_mode = TLSEXT_KEX_MODE_FLAG_KE | TLSEXT_KEX_MODE_FLAG_KE_DHE; | |
b2f7e8c0 MC |
525 | #endif |
526 | ||
527 | return 1; | |
528 | } | |
529 | ||
3847d426 MC |
530 | #ifndef OPENSSL_NO_TLS1_3 |
531 | static int add_key_share(SSL *s, WPACKET *pkt, unsigned int curve_id) | |
532 | { | |
2248dbeb MC |
533 | unsigned char *encoded_point; |
534 | EVP_PKEY *key_share_key; | |
3847d426 MC |
535 | size_t encodedlen; |
536 | ||
537 | key_share_key = ssl_generate_pkey_curve(curve_id); | |
538 | if (key_share_key == NULL) { | |
539 | SSLerr(SSL_F_ADD_KEY_SHARE, ERR_R_EVP_LIB); | |
540 | return 0; | |
541 | } | |
542 | ||
543 | /* Encode the public key. */ | |
544 | encodedlen = EVP_PKEY_get1_tls_encodedpoint(key_share_key, | |
2248dbeb | 545 | &encoded_point); |
3847d426 MC |
546 | if (encodedlen == 0) { |
547 | SSLerr(SSL_F_ADD_KEY_SHARE, ERR_R_EC_LIB); | |
548 | EVP_PKEY_free(key_share_key); | |
549 | return 0; | |
550 | } | |
551 | ||
552 | /* Create KeyShareEntry */ | |
553 | if (!WPACKET_put_bytes_u16(pkt, curve_id) | |
2248dbeb | 554 | || !WPACKET_sub_memcpy_u16(pkt, encoded_point, encodedlen)) { |
3847d426 MC |
555 | SSLerr(SSL_F_ADD_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
556 | EVP_PKEY_free(key_share_key); | |
2248dbeb | 557 | OPENSSL_free(encoded_point); |
3847d426 MC |
558 | return 0; |
559 | } | |
560 | ||
561 | /* | |
562 | * TODO(TLS1.3): When changing to send more than one key_share we're | |
563 | * going to need to be able to save more than one EVP_PKEY. For now | |
564 | * we reuse the existing tmp.pkey | |
565 | */ | |
566 | s->s3->tmp.pkey = key_share_key; | |
567 | s->s3->group_id = curve_id; | |
2248dbeb | 568 | OPENSSL_free(encoded_point); |
3847d426 MC |
569 | |
570 | return 1; | |
571 | } | |
572 | #endif | |
573 | ||
61138358 MC |
574 | int tls_construct_ctos_key_share(SSL *s, WPACKET *pkt, unsigned int context, |
575 | X509 *x, size_t chainidx, int *al) | |
ab83e314 | 576 | { |
3cf96e88 | 577 | #ifndef OPENSSL_NO_TLS1_3 |
3847d426 | 578 | size_t i, num_curves = 0; |
ab83e314 | 579 | const unsigned char *pcurves = NULL; |
3847d426 | 580 | unsigned int curve_id = 0; |
ab83e314 MC |
581 | |
582 | /* key_share extension */ | |
583 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
584 | /* Extension data sub-packet */ | |
585 | || !WPACKET_start_sub_packet_u16(pkt) | |
586 | /* KeyShare list sub-packet */ | |
587 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 588 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
589 | return 0; |
590 | } | |
591 | ||
ab83e314 | 592 | if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) { |
7fe97c07 | 593 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
594 | return 0; |
595 | } | |
596 | ||
3847d426 MC |
597 | if (s->s3->tmp.pkey != NULL) { |
598 | /* Shouldn't happen! */ | |
599 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); | |
600 | return 0; | |
601 | } | |
602 | ||
ab83e314 MC |
603 | /* |
604 | * TODO(TLS1.3): Make the number of key_shares sent configurable. For | |
605 | * now, just send one | |
606 | */ | |
3847d426 MC |
607 | if (s->s3->group_id != 0) { |
608 | curve_id = s->s3->group_id; | |
609 | } else { | |
610 | for (i = 0; i < num_curves; i++, pcurves += 2) { | |
ab83e314 | 611 | |
3847d426 MC |
612 | if (!tls_curve_allowed(s, pcurves, SSL_SECOP_CURVE_SUPPORTED)) |
613 | continue; | |
ab83e314 | 614 | |
0dd7ba24 | 615 | curve_id = bytestogroup(pcurves); |
3847d426 | 616 | break; |
ab83e314 | 617 | } |
3847d426 | 618 | } |
ab83e314 | 619 | |
3847d426 MC |
620 | if (curve_id == 0) { |
621 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, SSL_R_NO_SUITABLE_KEY_SHARE); | |
622 | return 0; | |
ab83e314 MC |
623 | } |
624 | ||
3847d426 MC |
625 | if (!add_key_share(s, pkt, curve_id)) |
626 | return 0; | |
627 | ||
ab83e314 | 628 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { |
7fe97c07 | 629 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
630 | return 0; |
631 | } | |
3cf96e88 | 632 | #endif |
ab83e314 MC |
633 | |
634 | return 1; | |
635 | } | |
636 | ||
cfef5027 MC |
637 | int tls_construct_ctos_cookie(SSL *s, WPACKET *pkt, unsigned int context, |
638 | X509 *x, size_t chainidx, int *al) | |
639 | { | |
640 | int ret = 0; | |
641 | ||
642 | /* Should only be set if we've had an HRR */ | |
643 | if (s->ext.tls13_cookie_len == 0) | |
644 | return 1; | |
645 | ||
646 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_cookie) | |
647 | /* Extension data sub-packet */ | |
648 | || !WPACKET_start_sub_packet_u16(pkt) | |
649 | || !WPACKET_sub_memcpy_u16(pkt, s->ext.tls13_cookie, | |
650 | s->ext.tls13_cookie_len) | |
651 | || !WPACKET_close(pkt)) { | |
652 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_COOKIE, ERR_R_INTERNAL_ERROR); | |
653 | goto end; | |
654 | } | |
655 | ||
656 | ret = 1; | |
657 | end: | |
658 | OPENSSL_free(s->ext.tls13_cookie); | |
febb0afa | 659 | s->ext.tls13_cookie = NULL; |
cfef5027 MC |
660 | s->ext.tls13_cookie_len = 0; |
661 | ||
662 | return ret; | |
663 | } | |
664 | ||
38df5a45 MC |
665 | int tls_construct_ctos_early_data(SSL *s, WPACKET *pkt, unsigned int context, |
666 | X509 *x, size_t chainidx, int *al) | |
667 | { | |
668 | if (s->early_data_state != SSL_EARLY_DATA_CONNECTING | |
669 | || s->session->ext.max_early_data == 0) { | |
670 | s->max_early_data = 0; | |
671 | return 1; | |
672 | } | |
673 | s->max_early_data = s->session->ext.max_early_data; | |
674 | ||
675 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) | |
676 | || !WPACKET_start_sub_packet_u16(pkt) | |
677 | || !WPACKET_close(pkt)) { | |
678 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, ERR_R_INTERNAL_ERROR); | |
679 | return 0; | |
680 | } | |
681 | ||
682 | /* | |
683 | * We set this to rejected here. Later, if the server acknowledges the | |
684 | * extension, we set it to accepted. | |
685 | */ | |
686 | s->ext.early_data = SSL_EARLY_DATA_REJECTED; | |
687 | ||
688 | return 1; | |
689 | } | |
690 | ||
1266eefd MC |
691 | #define F5_WORKAROUND_MIN_MSG_LEN 0xff |
692 | #define F5_WORKAROUND_MAX_MSG_LEN 0x200 | |
693 | ||
d702ad12 MC |
694 | /* |
695 | * PSK pre binder overhead = | |
696 | * 2 bytes for TLSEXT_TYPE_psk | |
697 | * 2 bytes for extension length | |
698 | * 2 bytes for identities list length | |
699 | * 2 bytes for identity length | |
700 | * 4 bytes for obfuscated_ticket_age | |
701 | * 2 bytes for binder list length | |
702 | * 1 byte for binder length | |
703 | * The above excludes the number of bytes for the identity itself and the | |
704 | * subsequent binder bytes | |
705 | */ | |
706 | #define PSK_PRE_BINDER_OVERHEAD (2 + 2 + 2 + 2 + 4 + 2 + 1) | |
707 | ||
61138358 MC |
708 | int tls_construct_ctos_padding(SSL *s, WPACKET *pkt, unsigned int context, |
709 | X509 *x, size_t chainidx, int *al) | |
ab83e314 MC |
710 | { |
711 | unsigned char *padbytes; | |
712 | size_t hlen; | |
713 | ||
714 | if ((s->options & SSL_OP_TLSEXT_PADDING) == 0) | |
715 | return 1; | |
716 | ||
717 | /* | |
d702ad12 MC |
718 | * Add padding to workaround bugs in F5 terminators. See RFC7685. |
719 | * This code calculates the length of all extensions added so far but | |
720 | * excludes the PSK extension (because that MUST be written last). Therefore | |
721 | * this extension MUST always appear second to last. | |
ab83e314 MC |
722 | */ |
723 | if (!WPACKET_get_total_written(pkt, &hlen)) { | |
7fe97c07 | 724 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
725 | return 0; |
726 | } | |
727 | ||
d702ad12 MC |
728 | /* |
729 | * If we're going to send a PSK then that will be written out after this | |
730 | * extension, so we need to calculate how long it is going to be. | |
731 | */ | |
732 | if (s->session->ssl_version == TLS1_3_VERSION | |
733 | && s->session->ext.ticklen != 0 | |
734 | && s->session->cipher != NULL) { | |
735 | const EVP_MD *md = ssl_md(s->session->cipher->algorithm2); | |
736 | ||
737 | if (md != NULL) { | |
738 | /* | |
739 | * Add the fixed PSK overhead, the identity length and the binder | |
740 | * length. | |
741 | */ | |
742 | hlen += PSK_PRE_BINDER_OVERHEAD + s->session->ext.ticklen | |
743 | + EVP_MD_size(md); | |
744 | } | |
745 | } | |
746 | ||
1266eefd | 747 | if (hlen > F5_WORKAROUND_MIN_MSG_LEN && hlen < F5_WORKAROUND_MAX_MSG_LEN) { |
1ee4b98e | 748 | /* Calculate the amount of padding we need to add */ |
1266eefd MC |
749 | hlen = F5_WORKAROUND_MAX_MSG_LEN - hlen; |
750 | ||
751 | /* | |
752 | * Take off the size of extension header itself (2 bytes for type and | |
753 | * 2 bytes for length bytes) | |
754 | */ | |
ab83e314 MC |
755 | if (hlen >= 4) |
756 | hlen -= 4; | |
757 | else | |
758 | hlen = 0; | |
759 | ||
760 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_padding) | |
761 | || !WPACKET_sub_allocate_bytes_u16(pkt, hlen, &padbytes)) { | |
7fe97c07 | 762 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
763 | return 0; |
764 | } | |
765 | memset(padbytes, 0, hlen); | |
766 | } | |
767 | ||
768 | return 1; | |
769 | } | |
770 | ||
ec15acb6 MC |
771 | /* |
772 | * Construct the pre_shared_key extension | |
773 | */ | |
61138358 MC |
774 | int tls_construct_ctos_psk(SSL *s, WPACKET *pkt, unsigned int context, X509 *x, |
775 | size_t chainidx, int *al) | |
ec15acb6 MC |
776 | { |
777 | #ifndef OPENSSL_NO_TLS1_3 | |
40f805ad | 778 | uint32_t now, agesec, agems; |
1053a6e2 | 779 | size_t hashsize, binderoffset, msglen; |
ec15acb6 | 780 | unsigned char *binder = NULL, *msgstart = NULL; |
ec15acb6 | 781 | const EVP_MD *md; |
ec15acb6 MC |
782 | int ret = 0; |
783 | ||
784 | s->session->ext.tick_identity = TLSEXT_PSK_BAD_IDENTITY; | |
785 | ||
d702ad12 MC |
786 | /* |
787 | * Note: At this stage of the code we only support adding a single | |
788 | * resumption PSK. If we add support for multiple PSKs then the length | |
789 | * calculations in the padding extension will need to be adjusted. | |
790 | */ | |
791 | ||
ec15acb6 | 792 | /* |
08191294 MC |
793 | * If this is an incompatible or new session then we have nothing to resume |
794 | * so don't add this extension. | |
ec15acb6 | 795 | */ |
08191294 MC |
796 | if (s->session->ssl_version != TLS1_3_VERSION |
797 | || s->session->ext.ticklen == 0) | |
ec15acb6 MC |
798 | return 1; |
799 | ||
40f805ad MC |
800 | if (s->session->cipher == NULL) { |
801 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR); | |
802 | goto err; | |
803 | } | |
804 | ||
1f5b44e9 MC |
805 | md = ssl_md(s->session->cipher->algorithm2); |
806 | if (md == NULL) { | |
1ee4b98e | 807 | /* Don't recognize this cipher so we can't use the session. Ignore it */ |
1f5b44e9 MC |
808 | return 1; |
809 | } | |
810 | ||
cf3e221b MC |
811 | if (s->hello_retry_request && md != ssl_handshake_md(s)) { |
812 | /* | |
813 | * Selected ciphersuite hash does not match the hash for the session so | |
814 | * we can't use it. | |
815 | */ | |
816 | return 1; | |
817 | } | |
818 | ||
ec15acb6 MC |
819 | /* |
820 | * Technically the C standard just says time() returns a time_t and says | |
821 | * nothing about the encoding of that type. In practice most implementations | |
822 | * follow POSIX which holds it as an integral type in seconds since epoch. | |
823 | * We've already made the assumption that we can do this in multiple places | |
824 | * in the code, so portability shouldn't be an issue. | |
825 | */ | |
826 | now = (uint32_t)time(NULL); | |
40f805ad | 827 | agesec = now - (uint32_t)s->session->time; |
ec15acb6 | 828 | |
40f805ad | 829 | if (s->session->ext.tick_lifetime_hint < agesec) { |
fc24f0bf MC |
830 | /* Ticket is too old. Ignore it. */ |
831 | return 1; | |
832 | } | |
833 | ||
ec15acb6 MC |
834 | /* |
835 | * Calculate age in ms. We're just doing it to nearest second. Should be | |
836 | * good enough. | |
837 | */ | |
40f805ad | 838 | agems = agesec * (uint32_t)1000; |
ec15acb6 | 839 | |
40f805ad | 840 | if (agesec != 0 && agems / (uint32_t)1000 != agesec) { |
ec15acb6 MC |
841 | /* |
842 | * Overflow. Shouldn't happen unless this is a *really* old session. If | |
843 | * so we just ignore it. | |
844 | */ | |
845 | return 1; | |
846 | } | |
847 | ||
fc24f0bf MC |
848 | /* |
849 | * Obfuscate the age. Overflow here is fine, this addition is supposed to | |
850 | * be mod 2^32. | |
851 | */ | |
852 | agems += s->session->ext.tick_age_add; | |
ec15acb6 | 853 | |
ec15acb6 MC |
854 | hashsize = EVP_MD_size(md); |
855 | ||
856 | /* Create the extension, but skip over the binder for now */ | |
857 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk) | |
858 | || !WPACKET_start_sub_packet_u16(pkt) | |
859 | || !WPACKET_start_sub_packet_u16(pkt) | |
860 | || !WPACKET_sub_memcpy_u16(pkt, s->session->ext.tick, | |
861 | s->session->ext.ticklen) | |
862 | || !WPACKET_put_bytes_u32(pkt, agems) | |
863 | || !WPACKET_close(pkt) | |
864 | || !WPACKET_get_total_written(pkt, &binderoffset) | |
865 | || !WPACKET_start_sub_packet_u16(pkt) | |
866 | || !WPACKET_sub_allocate_bytes_u8(pkt, hashsize, &binder) | |
867 | || !WPACKET_close(pkt) | |
868 | || !WPACKET_close(pkt) | |
869 | || !WPACKET_get_total_written(pkt, &msglen) | |
870 | /* | |
871 | * We need to fill in all the sub-packet lengths now so we can | |
872 | * calculate the HMAC of the message up to the binders | |
873 | */ | |
874 | || !WPACKET_fill_lengths(pkt)) { | |
875 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR); | |
876 | goto err; | |
877 | } | |
878 | ||
879 | msgstart = WPACKET_get_curr(pkt) - msglen; | |
880 | ||
1053a6e2 MC |
881 | if (tls_psk_do_binder(s, md, msgstart, binderoffset, NULL, binder, |
882 | s->session, 1) != 1) { | |
ec15acb6 MC |
883 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR); |
884 | goto err; | |
885 | } | |
886 | ||
887 | s->session->ext.tick_identity = 0; | |
888 | ||
889 | ret = 1; | |
890 | err: | |
ec15acb6 MC |
891 | return ret; |
892 | #else | |
893 | return 1; | |
894 | #endif | |
895 | } | |
896 | ||
6dd083fd MC |
897 | /* |
898 | * Parse the server's renegotiation binding and abort if it's not right | |
899 | */ | |
61138358 MC |
900 | int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, unsigned int context, |
901 | X509 *x, size_t chainidx, int *al) | |
6dd083fd MC |
902 | { |
903 | size_t expected_len = s->s3->previous_client_finished_len | |
904 | + s->s3->previous_server_finished_len; | |
905 | size_t ilen; | |
906 | const unsigned char *data; | |
907 | ||
908 | /* Check for logic errors */ | |
909 | assert(expected_len == 0 || s->s3->previous_client_finished_len != 0); | |
910 | assert(expected_len == 0 || s->s3->previous_server_finished_len != 0); | |
911 | ||
912 | /* Parse the length byte */ | |
913 | if (!PACKET_get_1_len(pkt, &ilen)) { | |
7fe97c07 | 914 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
915 | SSL_R_RENEGOTIATION_ENCODING_ERR); |
916 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
917 | return 0; | |
918 | } | |
919 | ||
920 | /* Consistency check */ | |
921 | if (PACKET_remaining(pkt) != ilen) { | |
7fe97c07 | 922 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
923 | SSL_R_RENEGOTIATION_ENCODING_ERR); |
924 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
925 | return 0; | |
926 | } | |
927 | ||
928 | /* Check that the extension matches */ | |
929 | if (ilen != expected_len) { | |
7fe97c07 | 930 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
931 | SSL_R_RENEGOTIATION_MISMATCH); |
932 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
933 | return 0; | |
934 | } | |
935 | ||
936 | if (!PACKET_get_bytes(pkt, &data, s->s3->previous_client_finished_len) | |
937 | || memcmp(data, s->s3->previous_client_finished, | |
938 | s->s3->previous_client_finished_len) != 0) { | |
7fe97c07 | 939 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
940 | SSL_R_RENEGOTIATION_MISMATCH); |
941 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
942 | return 0; | |
943 | } | |
944 | ||
945 | if (!PACKET_get_bytes(pkt, &data, s->s3->previous_server_finished_len) | |
946 | || memcmp(data, s->s3->previous_server_finished, | |
947 | s->s3->previous_server_finished_len) != 0) { | |
7fe97c07 | 948 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
949 | SSL_R_RENEGOTIATION_MISMATCH); |
950 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
951 | return 0; | |
952 | } | |
953 | s->s3->send_connection_binding = 1; | |
954 | ||
955 | return 1; | |
956 | } | |
957 | ||
61138358 MC |
958 | int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, unsigned int context, |
959 | X509 *x, size_t chainidx, int *al) | |
6dd083fd | 960 | { |
aff8c126 | 961 | if (s->ext.hostname == NULL || PACKET_remaining(pkt) > 0) { |
6dd083fd MC |
962 | *al = SSL_AD_UNRECOGNIZED_NAME; |
963 | return 0; | |
964 | } | |
965 | ||
966 | if (!s->hit) { | |
aff8c126 | 967 | if (s->session->ext.hostname != NULL) { |
6dd083fd MC |
968 | *al = SSL_AD_INTERNAL_ERROR; |
969 | return 0; | |
970 | } | |
aff8c126 RS |
971 | s->session->ext.hostname = OPENSSL_strdup(s->ext.hostname); |
972 | if (s->session->ext.hostname == NULL) { | |
6dd083fd MC |
973 | *al = SSL_AD_INTERNAL_ERROR; |
974 | return 0; | |
975 | } | |
976 | } | |
977 | ||
978 | return 1; | |
979 | } | |
980 | ||
981 | #ifndef OPENSSL_NO_EC | |
61138358 MC |
982 | int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context, |
983 | X509 *x, size_t chainidx, int *al) | |
6dd083fd | 984 | { |
aff8c126 | 985 | unsigned int ecpointformats_len; |
6dd083fd MC |
986 | PACKET ecptformatlist; |
987 | ||
988 | if (!PACKET_as_length_prefixed_1(pkt, &ecptformatlist)) { | |
989 | *al = SSL_AD_DECODE_ERROR; | |
990 | return 0; | |
991 | } | |
992 | if (!s->hit) { | |
aff8c126 RS |
993 | ecpointformats_len = PACKET_remaining(&ecptformatlist); |
994 | s->session->ext.ecpointformats_len = 0; | |
6dd083fd | 995 | |
aff8c126 RS |
996 | OPENSSL_free(s->session->ext.ecpointformats); |
997 | s->session->ext.ecpointformats = OPENSSL_malloc(ecpointformats_len); | |
998 | if (s->session->ext.ecpointformats == NULL) { | |
6dd083fd MC |
999 | *al = SSL_AD_INTERNAL_ERROR; |
1000 | return 0; | |
1001 | } | |
1002 | ||
aff8c126 | 1003 | s->session->ext.ecpointformats_len = ecpointformats_len; |
6dd083fd MC |
1004 | |
1005 | if (!PACKET_copy_bytes(&ecptformatlist, | |
aff8c126 RS |
1006 | s->session->ext.ecpointformats, |
1007 | ecpointformats_len)) { | |
6dd083fd MC |
1008 | *al = SSL_AD_INTERNAL_ERROR; |
1009 | return 0; | |
1010 | } | |
1011 | } | |
1012 | ||
1013 | return 1; | |
1014 | } | |
1015 | #endif | |
1016 | ||
61138358 MC |
1017 | int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, unsigned int context, |
1018 | X509 *x, size_t chainidx, int *al) | |
6dd083fd | 1019 | { |
aff8c126 RS |
1020 | if (s->ext.session_ticket_cb != NULL && |
1021 | !s->ext.session_ticket_cb(s, PACKET_data(pkt), | |
1022 | PACKET_remaining(pkt), | |
1023 | s->ext.session_ticket_cb_arg)) { | |
6dd083fd MC |
1024 | *al = SSL_AD_INTERNAL_ERROR; |
1025 | return 0; | |
1026 | } | |
1266eefd | 1027 | |
6dd083fd MC |
1028 | if (!tls_use_ticket(s) || PACKET_remaining(pkt) > 0) { |
1029 | *al = SSL_AD_UNSUPPORTED_EXTENSION; | |
1030 | return 0; | |
1031 | } | |
1266eefd | 1032 | |
aff8c126 | 1033 | s->ext.ticket_expected = 1; |
6dd083fd MC |
1034 | |
1035 | return 1; | |
1036 | } | |
1037 | ||
ab83e314 | 1038 | #ifndef OPENSSL_NO_OCSP |
61138358 MC |
1039 | int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, unsigned int context, |
1040 | X509 *x, size_t chainidx, int *al) | |
6dd083fd MC |
1041 | { |
1042 | /* | |
f63e4288 MC |
1043 | * MUST only be sent if we've requested a status |
1044 | * request message. In TLS <= 1.2 it must also be empty. | |
6dd083fd | 1045 | */ |
d9aea041 | 1046 | if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp |
f63e4288 | 1047 | || (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) > 0)) { |
6dd083fd MC |
1048 | *al = SSL_AD_UNSUPPORTED_EXTENSION; |
1049 | return 0; | |
1050 | } | |
f63e4288 MC |
1051 | |
1052 | if (SSL_IS_TLS13(s)) { | |
1053 | /* We only know how to handle this if it's for the first Certificate in | |
1ee4b98e | 1054 | * the chain. We ignore any other responses. |
f63e4288 | 1055 | */ |
8521ced6 | 1056 | if (chainidx != 0) |
f63e4288 MC |
1057 | return 1; |
1058 | return tls_process_cert_status_body(s, pkt, al); | |
1059 | } | |
1060 | ||
6dd083fd | 1061 | /* Set flag to expect CertificateStatus message */ |
aff8c126 | 1062 | s->ext.status_expected = 1; |
6dd083fd MC |
1063 | |
1064 | return 1; | |
1065 | } | |
ab83e314 | 1066 | #endif |
6dd083fd MC |
1067 | |
1068 | ||
1069 | #ifndef OPENSSL_NO_CT | |
61138358 MC |
1070 | int tls_parse_stoc_sct(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1071 | size_t chainidx, int *al) | |
6dd083fd MC |
1072 | { |
1073 | /* | |
1074 | * Only take it if we asked for it - i.e if there is no CT validation | |
1075 | * callback set, then a custom extension MAY be processing it, so we | |
1076 | * need to let control continue to flow to that. | |
1077 | */ | |
1078 | if (s->ct_validation_callback != NULL) { | |
1079 | size_t size = PACKET_remaining(pkt); | |
1080 | ||
1081 | /* Simply copy it off for later processing */ | |
aff8c126 RS |
1082 | OPENSSL_free(s->ext.scts); |
1083 | s->ext.scts = NULL; | |
1266eefd | 1084 | |
aff8c126 | 1085 | s->ext.scts_len = size; |
6dd083fd | 1086 | if (size > 0) { |
aff8c126 RS |
1087 | s->ext.scts = OPENSSL_malloc(size); |
1088 | if (s->ext.scts == NULL | |
1089 | || !PACKET_copy_bytes(pkt, s->ext.scts, size)) { | |
6dd083fd MC |
1090 | *al = SSL_AD_INTERNAL_ERROR; |
1091 | return 0; | |
1092 | } | |
1093 | } | |
1094 | } else { | |
1095 | if (custom_ext_parse(s, 0, TLSEXT_TYPE_signed_certificate_timestamp, | |
1096 | PACKET_data(pkt), PACKET_remaining(pkt), al) <= 0) | |
1097 | return 0; | |
1098 | } | |
1099 | ||
1100 | return 1; | |
1101 | } | |
1102 | #endif | |
1103 | ||
1104 | ||
1105 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
1106 | /* | |
1107 | * ssl_next_proto_validate validates a Next Protocol Negotiation block. No | |
1108 | * elements of zero length are allowed and the set of elements must exactly | |
1109 | * fill the length of the block. Returns 1 on success or 0 on failure. | |
1110 | */ | |
1111 | static int ssl_next_proto_validate(PACKET *pkt) | |
1112 | { | |
1113 | PACKET tmp_protocol; | |
1114 | ||
1115 | while (PACKET_remaining(pkt)) { | |
1116 | if (!PACKET_get_length_prefixed_1(pkt, &tmp_protocol) | |
1117 | || PACKET_remaining(&tmp_protocol) == 0) | |
1118 | return 0; | |
1119 | } | |
1120 | ||
1121 | return 1; | |
1122 | } | |
1123 | ||
61138358 MC |
1124 | int tls_parse_stoc_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1125 | size_t chainidx, int *al) | |
6dd083fd MC |
1126 | { |
1127 | unsigned char *selected; | |
1128 | unsigned char selected_len; | |
1129 | PACKET tmppkt; | |
1130 | ||
1266eefd | 1131 | /* Check if we are in a renegotiation. If so ignore this extension */ |
c7f47786 | 1132 | if (!SSL_IS_FIRST_HANDSHAKE(s)) |
6dd083fd MC |
1133 | return 1; |
1134 | ||
1135 | /* We must have requested it. */ | |
aff8c126 | 1136 | if (s->ctx->ext.npn_select_cb == NULL) { |
6dd083fd MC |
1137 | *al = SSL_AD_UNSUPPORTED_EXTENSION; |
1138 | return 0; | |
1139 | } | |
1266eefd | 1140 | |
6dd083fd MC |
1141 | /* The data must be valid */ |
1142 | tmppkt = *pkt; | |
1143 | if (!ssl_next_proto_validate(&tmppkt)) { | |
1144 | *al = SSL_AD_DECODE_ERROR; | |
1145 | return 0; | |
1146 | } | |
aff8c126 RS |
1147 | if (s->ctx->ext.npn_select_cb(s, &selected, &selected_len, |
1148 | PACKET_data(pkt), | |
1149 | PACKET_remaining(pkt), | |
1150 | s->ctx->ext.npn_select_cb_arg) != | |
6dd083fd MC |
1151 | SSL_TLSEXT_ERR_OK) { |
1152 | *al = SSL_AD_INTERNAL_ERROR; | |
1153 | return 0; | |
1154 | } | |
1266eefd | 1155 | |
6dd083fd MC |
1156 | /* |
1157 | * Could be non-NULL if server has sent multiple NPN extensions in | |
1158 | * a single Serverhello | |
1159 | */ | |
aff8c126 RS |
1160 | OPENSSL_free(s->ext.npn); |
1161 | s->ext.npn = OPENSSL_malloc(selected_len); | |
1162 | if (s->ext.npn == NULL) { | |
6dd083fd MC |
1163 | *al = SSL_AD_INTERNAL_ERROR; |
1164 | return 0; | |
1165 | } | |
1166 | ||
aff8c126 RS |
1167 | memcpy(s->ext.npn, selected, selected_len); |
1168 | s->ext.npn_len = selected_len; | |
1169 | s->s3->npn_seen = 1; | |
6dd083fd MC |
1170 | |
1171 | return 1; | |
1172 | } | |
1173 | #endif | |
1174 | ||
61138358 MC |
1175 | int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1176 | size_t chainidx, int *al) | |
6dd083fd MC |
1177 | { |
1178 | size_t len; | |
1179 | ||
1180 | /* We must have requested it. */ | |
1181 | if (!s->s3->alpn_sent) { | |
1182 | *al = SSL_AD_UNSUPPORTED_EXTENSION; | |
1183 | return 0; | |
1184 | } | |
1185 | /*- | |
1186 | * The extension data consists of: | |
1187 | * uint16 list_length | |
1188 | * uint8 proto_length; | |
1189 | * uint8 proto[proto_length]; | |
1190 | */ | |
1191 | if (!PACKET_get_net_2_len(pkt, &len) | |
1192 | || PACKET_remaining(pkt) != len || !PACKET_get_1_len(pkt, &len) | |
1193 | || PACKET_remaining(pkt) != len) { | |
1194 | *al = SSL_AD_DECODE_ERROR; | |
1195 | return 0; | |
1196 | } | |
1197 | OPENSSL_free(s->s3->alpn_selected); | |
1198 | s->s3->alpn_selected = OPENSSL_malloc(len); | |
1199 | if (s->s3->alpn_selected == NULL) { | |
1200 | *al = SSL_AD_INTERNAL_ERROR; | |
1201 | return 0; | |
1202 | } | |
1203 | if (!PACKET_copy_bytes(pkt, s->s3->alpn_selected, len)) { | |
1204 | *al = SSL_AD_DECODE_ERROR; | |
1205 | return 0; | |
1206 | } | |
1207 | s->s3->alpn_selected_len = len; | |
1208 | ||
1209 | return 1; | |
1210 | } | |
1211 | ||
1212 | #ifndef OPENSSL_NO_SRTP | |
61138358 MC |
1213 | int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1214 | size_t chainidx, int *al) | |
6dd083fd MC |
1215 | { |
1216 | unsigned int id, ct, mki; | |
1217 | int i; | |
1218 | STACK_OF(SRTP_PROTECTION_PROFILE) *clnt; | |
1219 | SRTP_PROTECTION_PROFILE *prof; | |
1220 | ||
1266eefd MC |
1221 | if (!PACKET_get_net_2(pkt, &ct) || ct != 2 |
1222 | || !PACKET_get_net_2(pkt, &id) | |
1223 | || !PACKET_get_1(pkt, &mki) | |
1224 | || PACKET_remaining(pkt) != 0) { | |
7fe97c07 | 1225 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, |
6dd083fd MC |
1226 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
1227 | *al = SSL_AD_DECODE_ERROR; | |
1228 | return 0; | |
1229 | } | |
1230 | ||
1231 | if (mki != 0) { | |
1232 | /* Must be no MKI, since we never offer one */ | |
7fe97c07 | 1233 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, SSL_R_BAD_SRTP_MKI_VALUE); |
6dd083fd MC |
1234 | *al = SSL_AD_ILLEGAL_PARAMETER; |
1235 | return 0; | |
1236 | } | |
1237 | ||
6dd083fd | 1238 | /* Throw an error if the server gave us an unsolicited extension */ |
1266eefd | 1239 | clnt = SSL_get_srtp_profiles(s); |
6dd083fd | 1240 | if (clnt == NULL) { |
7fe97c07 | 1241 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, SSL_R_NO_SRTP_PROFILES); |
6dd083fd MC |
1242 | *al = SSL_AD_DECODE_ERROR; |
1243 | return 0; | |
1244 | } | |
1245 | ||
1246 | /* | |
1247 | * Check to see if the server gave us something we support (and | |
1248 | * presumably offered) | |
1249 | */ | |
1250 | for (i = 0; i < sk_SRTP_PROTECTION_PROFILE_num(clnt); i++) { | |
1251 | prof = sk_SRTP_PROTECTION_PROFILE_value(clnt, i); | |
1252 | ||
1253 | if (prof->id == id) { | |
1254 | s->srtp_profile = prof; | |
1255 | *al = 0; | |
1256 | return 1; | |
1257 | } | |
1258 | } | |
1259 | ||
7fe97c07 | 1260 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, |
6dd083fd MC |
1261 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
1262 | *al = SSL_AD_DECODE_ERROR; | |
1263 | return 0; | |
1264 | } | |
1265 | #endif | |
1266 | ||
61138358 MC |
1267 | int tls_parse_stoc_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1268 | size_t chainidx, int *al) | |
6dd083fd MC |
1269 | { |
1270 | /* Ignore if inappropriate ciphersuite */ | |
1271 | if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC) | |
1272 | && s->s3->tmp.new_cipher->algorithm_mac != SSL_AEAD | |
1273 | && s->s3->tmp.new_cipher->algorithm_enc != SSL_RC4) | |
28a31a0a | 1274 | s->ext.use_etm = 1; |
6dd083fd MC |
1275 | |
1276 | return 1; | |
1277 | } | |
1278 | ||
61138358 MC |
1279 | int tls_parse_stoc_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1280 | size_t chainidx, int *al) | |
6dd083fd MC |
1281 | { |
1282 | s->s3->flags |= TLS1_FLAGS_RECEIVED_EXTMS; | |
1283 | if (!s->hit) | |
1284 | s->session->flags |= SSL_SESS_FLAG_EXTMS; | |
1285 | ||
1286 | return 1; | |
1287 | } | |
1288 | ||
61138358 MC |
1289 | int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1290 | size_t chainidx, int *al) | |
6dd083fd | 1291 | { |
3cf96e88 | 1292 | #ifndef OPENSSL_NO_TLS1_3 |
6dd083fd MC |
1293 | unsigned int group_id; |
1294 | PACKET encoded_pt; | |
1295 | EVP_PKEY *ckey = s->s3->tmp.pkey, *skey = NULL; | |
1296 | ||
1297 | /* Sanity check */ | |
090c8118 | 1298 | if (ckey == NULL || s->s3->peer_tmp != NULL) { |
6dd083fd | 1299 | *al = SSL_AD_INTERNAL_ERROR; |
7fe97c07 | 1300 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1301 | return 0; |
1302 | } | |
1303 | ||
1304 | if (!PACKET_get_net_2(pkt, &group_id)) { | |
1305 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
7fe97c07 | 1306 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_LENGTH_MISMATCH); |
6dd083fd MC |
1307 | return 0; |
1308 | } | |
1309 | ||
fe874d27 | 1310 | if ((context & SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST) != 0) { |
3847d426 MC |
1311 | unsigned const char *pcurves = NULL; |
1312 | size_t i, num_curves; | |
1313 | ||
1314 | if (PACKET_remaining(pkt) != 0) { | |
1315 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
1316 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_LENGTH_MISMATCH); | |
1317 | return 0; | |
1318 | } | |
1319 | ||
1320 | /* | |
1321 | * It is an error if the HelloRetryRequest wants a key_share that we | |
1322 | * already sent in the first ClientHello | |
1323 | */ | |
1324 | if (group_id == s->s3->group_id) { | |
1325 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
1326 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE); | |
1327 | return 0; | |
1328 | } | |
1329 | ||
1330 | /* Validate the selected group is one we support */ | |
3847d426 MC |
1331 | if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) { |
1332 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); | |
1333 | return 0; | |
1334 | } | |
1335 | for (i = 0; i < num_curves; i++, pcurves += 2) { | |
0dd7ba24 | 1336 | if (group_id == bytestogroup(pcurves)) |
3847d426 MC |
1337 | break; |
1338 | } | |
1339 | if (i >= num_curves | |
1340 | || !tls_curve_allowed(s, pcurves, SSL_SECOP_CURVE_SUPPORTED)) { | |
1341 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
1342 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE); | |
1343 | return 0; | |
1344 | } | |
1345 | ||
1346 | s->s3->group_id = group_id; | |
1347 | EVP_PKEY_free(s->s3->tmp.pkey); | |
1348 | s->s3->tmp.pkey = NULL; | |
1349 | return 1; | |
1350 | } | |
1351 | ||
6dd083fd MC |
1352 | if (group_id != s->s3->group_id) { |
1353 | /* | |
1354 | * This isn't for the group that we sent in the original | |
1355 | * key_share! | |
1356 | */ | |
1357 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
7fe97c07 | 1358 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE); |
6dd083fd MC |
1359 | return 0; |
1360 | } | |
1361 | ||
1362 | if (!PACKET_as_length_prefixed_2(pkt, &encoded_pt) | |
1363 | || PACKET_remaining(&encoded_pt) == 0) { | |
1364 | *al = SSL_AD_DECODE_ERROR; | |
7fe97c07 | 1365 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_LENGTH_MISMATCH); |
6dd083fd MC |
1366 | return 0; |
1367 | } | |
1368 | ||
1369 | skey = ssl_generate_pkey(ckey); | |
1370 | if (skey == NULL) { | |
1371 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 1372 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_MALLOC_FAILURE); |
6dd083fd MC |
1373 | return 0; |
1374 | } | |
1375 | if (!EVP_PKEY_set1_tls_encodedpoint(skey, PACKET_data(&encoded_pt), | |
1376 | PACKET_remaining(&encoded_pt))) { | |
1377 | *al = SSL_AD_DECODE_ERROR; | |
7fe97c07 | 1378 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_ECPOINT); |
a1d6a0b6 | 1379 | EVP_PKEY_free(skey); |
6dd083fd MC |
1380 | return 0; |
1381 | } | |
1382 | ||
1383 | if (ssl_derive(s, ckey, skey, 1) == 0) { | |
1384 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 1385 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1386 | EVP_PKEY_free(skey); |
1387 | return 0; | |
1388 | } | |
090c8118 | 1389 | s->s3->peer_tmp = skey; |
3cf96e88 | 1390 | #endif |
6dd083fd MC |
1391 | |
1392 | return 1; | |
1393 | } | |
4ff65f77 | 1394 | |
cfef5027 MC |
1395 | int tls_parse_stoc_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1396 | size_t chainidx, int *al) | |
1397 | { | |
1398 | PACKET cookie; | |
1399 | ||
1400 | if (!PACKET_as_length_prefixed_2(pkt, &cookie) | |
1401 | || !PACKET_memdup(&cookie, &s->ext.tls13_cookie, | |
1402 | &s->ext.tls13_cookie_len)) { | |
1403 | *al = SSL_AD_DECODE_ERROR; | |
1404 | SSLerr(SSL_F_TLS_PARSE_STOC_COOKIE, SSL_R_LENGTH_MISMATCH); | |
1405 | return 0; | |
1406 | } | |
1407 | ||
1408 | return 1; | |
1409 | } | |
1410 | ||
38df5a45 MC |
1411 | int tls_parse_stoc_early_data(SSL *s, PACKET *pkt, unsigned int context, |
1412 | X509 *x, size_t chainidx, int *al) | |
1413 | { | |
fe874d27 | 1414 | if (context == SSL_EXT_TLS1_3_NEW_SESSION_TICKET) { |
6594189f MC |
1415 | unsigned long max_early_data; |
1416 | ||
1417 | if (!PACKET_get_net_4(pkt, &max_early_data) | |
1418 | || PACKET_remaining(pkt) != 0) { | |
1419 | SSLerr(SSL_F_TLS_PARSE_STOC_EARLY_DATA, | |
1420 | SSL_R_INVALID_MAX_EARLY_DATA); | |
1421 | *al = SSL_AD_DECODE_ERROR; | |
1422 | return 0; | |
1423 | } | |
1424 | ||
1425 | s->session->ext.max_early_data = max_early_data; | |
1426 | ||
1427 | return 1; | |
1428 | } | |
1429 | ||
38df5a45 MC |
1430 | if (PACKET_remaining(pkt) != 0) { |
1431 | *al = SSL_AD_DECODE_ERROR; | |
1432 | return 0; | |
1433 | } | |
1434 | ||
1435 | if (s->ext.early_data != SSL_EARLY_DATA_REJECTED | |
1436 | || !s->hit | |
1437 | || s->session->ext.tick_identity != 0) { | |
1438 | /* | |
1439 | * If we get here then we didn't send early data, or we didn't resume | |
1440 | * using the first identity so the server should not be accepting it. | |
1441 | */ | |
1442 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
1443 | return 0; | |
1444 | } | |
1445 | ||
1446 | s->ext.early_data = SSL_EARLY_DATA_ACCEPTED; | |
1447 | ||
1448 | return 1; | |
1449 | } | |
1450 | ||
61138358 MC |
1451 | int tls_parse_stoc_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1452 | size_t chainidx, int *al) | |
4ff65f77 MC |
1453 | { |
1454 | #ifndef OPENSSL_NO_TLS1_3 | |
1455 | unsigned int identity; | |
1456 | ||
1457 | if (!PACKET_get_net_2(pkt, &identity) || PACKET_remaining(pkt) != 0) { | |
1458 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
1459 | SSLerr(SSL_F_TLS_PARSE_STOC_PSK, SSL_R_LENGTH_MISMATCH); | |
1460 | return 0; | |
1461 | } | |
1462 | ||
1463 | if (s->session->ext.tick_identity != (int)identity) { | |
1464 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
1465 | SSLerr(SSL_F_TLS_PARSE_STOC_PSK, SSL_R_BAD_PSK_IDENTITY); | |
1466 | return 0; | |
1467 | } | |
1468 | ||
1469 | s->hit = 1; | |
1470 | #endif | |
1471 | ||
1472 | return 1; | |
1473 | } |