]>
Commit | Line | Data |
---|---|---|
6dd083fd | 1 | /* |
b186a592 | 2 | * Copyright 2016-2017 The OpenSSL Project Authors. All Rights Reserved. |
6dd083fd MC |
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 | ||
ab83e314 | 10 | #include <openssl/ocsp.h> |
6dd083fd MC |
11 | #include "../ssl_locl.h" |
12 | #include "statem_locl.h" | |
13 | ||
b186a592 MC |
14 | EXT_RETURN tls_construct_ctos_renegotiate(SSL *s, WPACKET *pkt, |
15 | unsigned int context, X509 *x, | |
16 | size_t chainidx, int *al) | |
ab83e314 MC |
17 | { |
18 | /* Add RI if renegotiating */ | |
19 | if (!s->renegotiate) | |
b186a592 | 20 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
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); |
b186a592 | 28 | return EXT_RETURN_FAIL; |
ab83e314 MC |
29 | } |
30 | ||
b186a592 | 31 | return EXT_RETURN_SENT; |
ab83e314 MC |
32 | } |
33 | ||
b186a592 MC |
34 | EXT_RETURN tls_construct_ctos_server_name(SSL *s, WPACKET *pkt, |
35 | unsigned int context, X509 *x, | |
36 | size_t chainidx, int *al) | |
ab83e314 | 37 | { |
aff8c126 | 38 | if (s->ext.hostname == NULL) |
b186a592 | 39 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
40 | |
41 | /* Add TLS extension servername to the Client Hello message */ | |
42 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_server_name) | |
43 | /* Sub-packet for server_name extension */ | |
44 | || !WPACKET_start_sub_packet_u16(pkt) | |
45 | /* Sub-packet for servername list (always 1 hostname)*/ | |
46 | || !WPACKET_start_sub_packet_u16(pkt) | |
47 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_NAMETYPE_host_name) | |
aff8c126 RS |
48 | || !WPACKET_sub_memcpy_u16(pkt, s->ext.hostname, |
49 | strlen(s->ext.hostname)) | |
ab83e314 MC |
50 | || !WPACKET_close(pkt) |
51 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 52 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SERVER_NAME, ERR_R_INTERNAL_ERROR); |
b186a592 | 53 | return EXT_RETURN_FAIL; |
ab83e314 MC |
54 | } |
55 | ||
b186a592 | 56 | return EXT_RETURN_SENT; |
ab83e314 MC |
57 | } |
58 | ||
59 | #ifndef OPENSSL_NO_SRP | |
b186a592 MC |
60 | EXT_RETURN tls_construct_ctos_srp(SSL *s, WPACKET *pkt, unsigned int context, |
61 | X509 *x, size_t chainidx, int *al) | |
ab83e314 MC |
62 | { |
63 | /* Add SRP username if there is one */ | |
64 | if (s->srp_ctx.login == NULL) | |
b186a592 | 65 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
66 | |
67 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_srp) | |
68 | /* Sub-packet for SRP extension */ | |
69 | || !WPACKET_start_sub_packet_u16(pkt) | |
70 | || !WPACKET_start_sub_packet_u8(pkt) | |
71 | /* login must not be zero...internal error if so */ | |
72 | || !WPACKET_set_flags(pkt, WPACKET_FLAGS_NON_ZERO_LENGTH) | |
73 | || !WPACKET_memcpy(pkt, s->srp_ctx.login, | |
74 | strlen(s->srp_ctx.login)) | |
75 | || !WPACKET_close(pkt) | |
76 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 77 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SRP, ERR_R_INTERNAL_ERROR); |
b186a592 | 78 | return EXT_RETURN_FAIL; |
ab83e314 MC |
79 | } |
80 | ||
b186a592 | 81 | return EXT_RETURN_SENT; |
ab83e314 MC |
82 | } |
83 | #endif | |
84 | ||
85 | #ifndef OPENSSL_NO_EC | |
86 | static int use_ecc(SSL *s) | |
87 | { | |
1266eefd | 88 | int i, end; |
ab83e314 MC |
89 | unsigned long alg_k, alg_a; |
90 | STACK_OF(SSL_CIPHER) *cipher_stack = NULL; | |
91 | ||
92 | /* See if we support any ECC ciphersuites */ | |
93 | if (s->version == SSL3_VERSION) | |
94 | return 0; | |
95 | ||
ab83e314 | 96 | cipher_stack = SSL_get_ciphers(s); |
1266eefd MC |
97 | end = sk_SSL_CIPHER_num(cipher_stack); |
98 | for (i = 0; i < end; i++) { | |
ab83e314 MC |
99 | const SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i); |
100 | ||
101 | alg_k = c->algorithm_mkey; | |
102 | alg_a = c->algorithm_auth; | |
103 | if ((alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) | |
1266eefd MC |
104 | || (alg_a & SSL_aECDSA) |
105 | || c->min_tls >= TLS1_3_VERSION) | |
e0926ef4 | 106 | return 1; |
ab83e314 MC |
107 | } |
108 | ||
e0926ef4 | 109 | return 0; |
ab83e314 MC |
110 | } |
111 | ||
b186a592 MC |
112 | EXT_RETURN tls_construct_ctos_ec_pt_formats(SSL *s, WPACKET *pkt, |
113 | unsigned int context, X509 *x, | |
114 | size_t chainidx, int *al) | |
ab83e314 MC |
115 | { |
116 | const unsigned char *pformats; | |
117 | size_t num_formats; | |
118 | ||
119 | if (!use_ecc(s)) | |
b186a592 | 120 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
121 | |
122 | /* Add TLS extension ECPointFormats to the ClientHello message */ | |
ab83e314 MC |
123 | tls1_get_formatlist(s, &pformats, &num_formats); |
124 | ||
125 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_ec_point_formats) | |
126 | /* Sub-packet for formats extension */ | |
127 | || !WPACKET_start_sub_packet_u16(pkt) | |
128 | || !WPACKET_sub_memcpy_u8(pkt, pformats, num_formats) | |
129 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 130 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR); |
b186a592 | 131 | return EXT_RETURN_FAIL; |
ab83e314 MC |
132 | } |
133 | ||
b186a592 | 134 | return EXT_RETURN_SENT; |
ab83e314 MC |
135 | } |
136 | ||
b186a592 MC |
137 | EXT_RETURN tls_construct_ctos_supported_groups(SSL *s, WPACKET *pkt, |
138 | unsigned int context, X509 *x, | |
139 | size_t chainidx, int *al) | |
ab83e314 MC |
140 | { |
141 | const unsigned char *pcurves = NULL, *pcurvestmp; | |
142 | size_t num_curves = 0, i; | |
143 | ||
144 | if (!use_ecc(s)) | |
b186a592 | 145 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
146 | |
147 | /* | |
148 | * Add TLS extension supported_groups to the ClientHello message | |
149 | */ | |
150 | /* TODO(TLS1.3): Add support for DHE groups */ | |
ab83e314 | 151 | if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) { |
7fe97c07 | 152 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, |
ab83e314 | 153 | ERR_R_INTERNAL_ERROR); |
b186a592 | 154 | return EXT_RETURN_FAIL; |
ab83e314 MC |
155 | } |
156 | pcurvestmp = pcurves; | |
157 | ||
158 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_groups) | |
159 | /* Sub-packet for supported_groups extension */ | |
160 | || !WPACKET_start_sub_packet_u16(pkt) | |
161 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 162 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, |
ab83e314 | 163 | ERR_R_INTERNAL_ERROR); |
b186a592 | 164 | return EXT_RETURN_FAIL; |
ab83e314 MC |
165 | } |
166 | /* Copy curve ID if supported */ | |
167 | for (i = 0; i < num_curves; i++, pcurvestmp += 2) { | |
7d061fce | 168 | if (tls_curve_allowed(s, pcurvestmp, SSL_SECOP_CURVE_SUPPORTED)) { |
ab83e314 MC |
169 | if (!WPACKET_put_bytes_u8(pkt, pcurvestmp[0]) |
170 | || !WPACKET_put_bytes_u8(pkt, pcurvestmp[1])) { | |
7fe97c07 | 171 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, |
ab83e314 | 172 | ERR_R_INTERNAL_ERROR); |
b186a592 | 173 | return EXT_RETURN_FAIL; |
ab83e314 MC |
174 | } |
175 | } | |
176 | } | |
177 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
7fe97c07 | 178 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, |
ab83e314 | 179 | ERR_R_INTERNAL_ERROR); |
b186a592 | 180 | return EXT_RETURN_FAIL; |
ab83e314 MC |
181 | } |
182 | ||
b186a592 | 183 | return EXT_RETURN_SENT; |
ab83e314 MC |
184 | } |
185 | #endif | |
186 | ||
b186a592 MC |
187 | EXT_RETURN tls_construct_ctos_session_ticket(SSL *s, WPACKET *pkt, |
188 | unsigned int context, X509 *x, | |
189 | size_t chainidx, int *al) | |
ab83e314 MC |
190 | { |
191 | size_t ticklen; | |
192 | ||
193 | if (!tls_use_ticket(s)) | |
b186a592 | 194 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
195 | |
196 | if (!s->new_session && s->session != NULL | |
08191294 MC |
197 | && s->session->ext.tick != NULL |
198 | && s->session->ssl_version != TLS1_3_VERSION) { | |
aff8c126 RS |
199 | ticklen = s->session->ext.ticklen; |
200 | } else if (s->session && s->ext.session_ticket != NULL | |
201 | && s->ext.session_ticket->data != NULL) { | |
202 | ticklen = s->ext.session_ticket->length; | |
203 | s->session->ext.tick = OPENSSL_malloc(ticklen); | |
204 | if (s->session->ext.tick == NULL) { | |
7fe97c07 | 205 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET, |
ab83e314 | 206 | ERR_R_INTERNAL_ERROR); |
b186a592 | 207 | return EXT_RETURN_FAIL; |
ab83e314 | 208 | } |
aff8c126 RS |
209 | memcpy(s->session->ext.tick, |
210 | s->ext.session_ticket->data, ticklen); | |
211 | s->session->ext.ticklen = ticklen; | |
ab83e314 MC |
212 | } else { |
213 | ticklen = 0; | |
214 | } | |
215 | ||
aff8c126 RS |
216 | if (ticklen == 0 && s->ext.session_ticket != NULL && |
217 | s->ext.session_ticket->data == NULL) | |
b186a592 | 218 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
219 | |
220 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket) | |
aff8c126 | 221 | || !WPACKET_sub_memcpy_u16(pkt, s->session->ext.tick, ticklen)) { |
7fe97c07 | 222 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET, ERR_R_INTERNAL_ERROR); |
b186a592 | 223 | return EXT_RETURN_FAIL; |
ab83e314 MC |
224 | } |
225 | ||
b186a592 | 226 | return EXT_RETURN_SENT; |
ab83e314 MC |
227 | } |
228 | ||
b186a592 MC |
229 | EXT_RETURN tls_construct_ctos_sig_algs(SSL *s, WPACKET *pkt, |
230 | unsigned int context, X509 *x, | |
231 | size_t chainidx, int *al) | |
ab83e314 MC |
232 | { |
233 | size_t salglen; | |
98c792d1 | 234 | const uint16_t *salg; |
ab83e314 MC |
235 | |
236 | if (!SSL_CLIENT_USE_SIGALGS(s)) | |
b186a592 | 237 | return EXT_RETURN_NOT_SENT; |
ab83e314 | 238 | |
a9669ddc | 239 | salglen = tls12_get_psigalgs(s, 1, &salg); |
ab83e314 MC |
240 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signature_algorithms) |
241 | /* Sub-packet for sig-algs extension */ | |
242 | || !WPACKET_start_sub_packet_u16(pkt) | |
243 | /* Sub-packet for the actual list */ | |
244 | || !WPACKET_start_sub_packet_u16(pkt) | |
245 | || !tls12_copy_sigalgs(s, pkt, salg, salglen) | |
246 | || !WPACKET_close(pkt) | |
247 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 248 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SIG_ALGS, ERR_R_INTERNAL_ERROR); |
b186a592 | 249 | return EXT_RETURN_FAIL; |
ab83e314 MC |
250 | } |
251 | ||
b186a592 | 252 | return EXT_RETURN_SENT; |
ab83e314 MC |
253 | } |
254 | ||
255 | #ifndef OPENSSL_NO_OCSP | |
b186a592 MC |
256 | EXT_RETURN tls_construct_ctos_status_request(SSL *s, WPACKET *pkt, |
257 | unsigned int context, X509 *x, | |
258 | size_t chainidx, int *al) | |
ab83e314 MC |
259 | { |
260 | int i; | |
261 | ||
e96e0f8e MC |
262 | /* This extension isn't defined for client Certificates */ |
263 | if (x != NULL) | |
b186a592 | 264 | return EXT_RETURN_NOT_SENT; |
e96e0f8e | 265 | |
aff8c126 | 266 | if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) |
b186a592 | 267 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
268 | |
269 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request) | |
270 | /* Sub-packet for status request extension */ | |
271 | || !WPACKET_start_sub_packet_u16(pkt) | |
272 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_STATUSTYPE_ocsp) | |
273 | /* Sub-packet for the ids */ | |
274 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 275 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); |
b186a592 | 276 | return EXT_RETURN_FAIL; |
ab83e314 | 277 | } |
aff8c126 | 278 | for (i = 0; i < sk_OCSP_RESPID_num(s->ext.ocsp.ids); i++) { |
ab83e314 | 279 | unsigned char *idbytes; |
aff8c126 | 280 | OCSP_RESPID *id = sk_OCSP_RESPID_value(s->ext.ocsp.ids, i); |
1266eefd | 281 | int idlen = i2d_OCSP_RESPID(id, NULL); |
ab83e314 | 282 | |
ab83e314 MC |
283 | if (idlen <= 0 |
284 | /* Sub-packet for an individual id */ | |
285 | || !WPACKET_sub_allocate_bytes_u16(pkt, idlen, &idbytes) | |
286 | || i2d_OCSP_RESPID(id, &idbytes) != idlen) { | |
7fe97c07 | 287 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, |
ab83e314 | 288 | ERR_R_INTERNAL_ERROR); |
b186a592 | 289 | return EXT_RETURN_FAIL; |
ab83e314 MC |
290 | } |
291 | } | |
292 | if (!WPACKET_close(pkt) | |
293 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 294 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); |
b186a592 | 295 | return EXT_RETURN_FAIL; |
ab83e314 | 296 | } |
aff8c126 | 297 | if (s->ext.ocsp.exts) { |
ab83e314 | 298 | unsigned char *extbytes; |
aff8c126 | 299 | int extlen = i2d_X509_EXTENSIONS(s->ext.ocsp.exts, NULL); |
ab83e314 MC |
300 | |
301 | if (extlen < 0) { | |
7fe97c07 | 302 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, |
ab83e314 | 303 | ERR_R_INTERNAL_ERROR); |
b186a592 | 304 | return EXT_RETURN_FAIL; |
ab83e314 MC |
305 | } |
306 | if (!WPACKET_allocate_bytes(pkt, extlen, &extbytes) | |
aff8c126 | 307 | || i2d_X509_EXTENSIONS(s->ext.ocsp.exts, &extbytes) |
ab83e314 | 308 | != extlen) { |
7fe97c07 | 309 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, |
ab83e314 | 310 | ERR_R_INTERNAL_ERROR); |
b186a592 | 311 | return EXT_RETURN_FAIL; |
ab83e314 MC |
312 | } |
313 | } | |
314 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
7fe97c07 | 315 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); |
b186a592 | 316 | return EXT_RETURN_FAIL; |
ab83e314 MC |
317 | } |
318 | ||
b186a592 | 319 | return EXT_RETURN_SENT; |
ab83e314 MC |
320 | } |
321 | #endif | |
322 | ||
323 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
b186a592 MC |
324 | EXT_RETURN tls_construct_ctos_npn(SSL *s, WPACKET *pkt, unsigned int context, |
325 | X509 *x, size_t chainidx, int *al) | |
ab83e314 | 326 | { |
c7f47786 | 327 | if (s->ctx->ext.npn_select_cb == NULL || !SSL_IS_FIRST_HANDSHAKE(s)) |
b186a592 | 328 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
329 | |
330 | /* | |
331 | * The client advertises an empty extension to indicate its support | |
332 | * for Next Protocol Negotiation | |
333 | */ | |
334 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_next_proto_neg) | |
335 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 336 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_NPN, ERR_R_INTERNAL_ERROR); |
b186a592 | 337 | return EXT_RETURN_FAIL; |
ab83e314 MC |
338 | } |
339 | ||
b186a592 | 340 | return EXT_RETURN_SENT; |
ab83e314 MC |
341 | } |
342 | #endif | |
343 | ||
b186a592 MC |
344 | EXT_RETURN tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, unsigned int context, |
345 | X509 *x, size_t chainidx, int *al) | |
ab83e314 MC |
346 | { |
347 | s->s3->alpn_sent = 0; | |
348 | ||
c7f47786 | 349 | if (s->ext.alpn == NULL || !SSL_IS_FIRST_HANDSHAKE(s)) |
b186a592 | 350 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
351 | |
352 | if (!WPACKET_put_bytes_u16(pkt, | |
353 | TLSEXT_TYPE_application_layer_protocol_negotiation) | |
354 | /* Sub-packet ALPN extension */ | |
355 | || !WPACKET_start_sub_packet_u16(pkt) | |
aff8c126 | 356 | || !WPACKET_sub_memcpy_u16(pkt, s->ext.alpn, s->ext.alpn_len) |
ab83e314 | 357 | || !WPACKET_close(pkt)) { |
7fe97c07 | 358 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ALPN, ERR_R_INTERNAL_ERROR); |
b186a592 | 359 | return EXT_RETURN_FAIL; |
ab83e314 MC |
360 | } |
361 | s->s3->alpn_sent = 1; | |
362 | ||
b186a592 | 363 | return EXT_RETURN_SENT; |
ab83e314 MC |
364 | } |
365 | ||
366 | ||
367 | #ifndef OPENSSL_NO_SRTP | |
b186a592 MC |
368 | EXT_RETURN tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt, |
369 | unsigned int context, X509 *x, | |
370 | size_t chainidx, int *al) | |
ab83e314 MC |
371 | { |
372 | STACK_OF(SRTP_PROTECTION_PROFILE) *clnt = SSL_get_srtp_profiles(s); | |
1266eefd | 373 | int i, end; |
ab83e314 MC |
374 | |
375 | if (clnt == NULL) | |
b186a592 | 376 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
377 | |
378 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp) | |
379 | /* Sub-packet for SRTP extension */ | |
380 | || !WPACKET_start_sub_packet_u16(pkt) | |
381 | /* Sub-packet for the protection profile list */ | |
382 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 383 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR); |
b186a592 | 384 | return EXT_RETURN_FAIL; |
ab83e314 | 385 | } |
1266eefd MC |
386 | |
387 | end = sk_SRTP_PROTECTION_PROFILE_num(clnt); | |
388 | for (i = 0; i < end; i++) { | |
389 | const SRTP_PROTECTION_PROFILE *prof = | |
390 | sk_SRTP_PROTECTION_PROFILE_value(clnt, i); | |
391 | ||
ab83e314 | 392 | if (prof == NULL || !WPACKET_put_bytes_u16(pkt, prof->id)) { |
7fe97c07 | 393 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR); |
b186a592 | 394 | return EXT_RETURN_FAIL; |
ab83e314 MC |
395 | } |
396 | } | |
397 | if (!WPACKET_close(pkt) | |
398 | /* Add an empty use_mki value */ | |
399 | || !WPACKET_put_bytes_u8(pkt, 0) | |
400 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 401 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR); |
b186a592 | 402 | return EXT_RETURN_FAIL; |
ab83e314 MC |
403 | } |
404 | ||
b186a592 | 405 | return EXT_RETURN_SENT; |
ab83e314 MC |
406 | } |
407 | #endif | |
408 | ||
b186a592 MC |
409 | EXT_RETURN tls_construct_ctos_etm(SSL *s, WPACKET *pkt, unsigned int context, |
410 | X509 *x, size_t chainidx, int *al) | |
ab83e314 MC |
411 | { |
412 | if (s->options & SSL_OP_NO_ENCRYPT_THEN_MAC) | |
b186a592 | 413 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
414 | |
415 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac) | |
416 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 417 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ETM, ERR_R_INTERNAL_ERROR); |
b186a592 | 418 | return EXT_RETURN_FAIL; |
ab83e314 MC |
419 | } |
420 | ||
b186a592 | 421 | return EXT_RETURN_SENT; |
ab83e314 MC |
422 | } |
423 | ||
424 | #ifndef OPENSSL_NO_CT | |
b186a592 MC |
425 | EXT_RETURN tls_construct_ctos_sct(SSL *s, WPACKET *pkt, unsigned int context, |
426 | X509 *x, size_t chainidx, int *al) | |
ab83e314 MC |
427 | { |
428 | if (s->ct_validation_callback == NULL) | |
b186a592 | 429 | return EXT_RETURN_NOT_SENT; |
ab83e314 | 430 | |
e96e0f8e MC |
431 | /* Not defined for client Certificates */ |
432 | if (x != NULL) | |
b186a592 | 433 | return EXT_RETURN_NOT_SENT; |
e96e0f8e | 434 | |
ab83e314 MC |
435 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signed_certificate_timestamp) |
436 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 437 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SCT, ERR_R_INTERNAL_ERROR); |
b186a592 | 438 | return EXT_RETURN_FAIL; |
ab83e314 MC |
439 | } |
440 | ||
b186a592 | 441 | return EXT_RETURN_SENT; |
ab83e314 MC |
442 | } |
443 | #endif | |
444 | ||
b186a592 MC |
445 | EXT_RETURN tls_construct_ctos_ems(SSL *s, WPACKET *pkt, unsigned int context, |
446 | X509 *x, size_t chainidx, int *al) | |
ab83e314 MC |
447 | { |
448 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret) | |
449 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 450 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EMS, ERR_R_INTERNAL_ERROR); |
b186a592 | 451 | return EXT_RETURN_FAIL; |
ab83e314 MC |
452 | } |
453 | ||
b186a592 | 454 | return EXT_RETURN_SENT; |
ab83e314 MC |
455 | } |
456 | ||
b186a592 MC |
457 | EXT_RETURN tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt, |
458 | unsigned int context, X509 *x, | |
459 | size_t chainidx, int *al) | |
ab83e314 MC |
460 | { |
461 | int currv, min_version, max_version, reason; | |
462 | ||
463 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_versions) | |
464 | || !WPACKET_start_sub_packet_u16(pkt) | |
465 | || !WPACKET_start_sub_packet_u8(pkt)) { | |
7fe97c07 | 466 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, |
ab83e314 | 467 | ERR_R_INTERNAL_ERROR); |
b186a592 | 468 | return EXT_RETURN_FAIL; |
ab83e314 MC |
469 | } |
470 | ||
38a73150 | 471 | reason = ssl_get_min_max_version(s, &min_version, &max_version); |
ab83e314 | 472 | if (reason != 0) { |
7fe97c07 | 473 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, reason); |
b186a592 | 474 | return EXT_RETURN_FAIL; |
ab83e314 MC |
475 | } |
476 | ||
477 | /* | |
1ee4b98e | 478 | * TODO(TLS1.3): There is some discussion on the TLS list as to whether |
ab83e314 MC |
479 | * we should include versions <TLS1.2. For the moment we do. To be |
480 | * reviewed later. | |
481 | */ | |
482 | for (currv = max_version; currv >= min_version; currv--) { | |
483 | /* TODO(TLS1.3): Remove this first if clause prior to release!! */ | |
484 | if (currv == TLS1_3_VERSION) { | |
485 | if (!WPACKET_put_bytes_u16(pkt, TLS1_3_VERSION_DRAFT)) { | |
7fe97c07 | 486 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, |
ab83e314 | 487 | ERR_R_INTERNAL_ERROR); |
b186a592 | 488 | return EXT_RETURN_FAIL; |
ab83e314 MC |
489 | } |
490 | } else if (!WPACKET_put_bytes_u16(pkt, currv)) { | |
7fe97c07 | 491 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, |
ab83e314 | 492 | ERR_R_INTERNAL_ERROR); |
b186a592 | 493 | return EXT_RETURN_FAIL; |
ab83e314 MC |
494 | } |
495 | } | |
496 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
7fe97c07 | 497 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, |
ab83e314 | 498 | ERR_R_INTERNAL_ERROR); |
b186a592 | 499 | return EXT_RETURN_FAIL; |
ab83e314 MC |
500 | } |
501 | ||
b186a592 | 502 | return EXT_RETURN_SENT; |
ab83e314 MC |
503 | } |
504 | ||
b2f7e8c0 MC |
505 | /* |
506 | * Construct a psk_kex_modes extension. We only have two modes we know about | |
507 | * at this stage, so we send both. | |
508 | */ | |
b186a592 MC |
509 | EXT_RETURN tls_construct_ctos_psk_kex_modes(SSL *s, WPACKET *pkt, |
510 | unsigned int context, X509 *x, | |
511 | size_t chainidx, int *al) | |
b2f7e8c0 MC |
512 | { |
513 | #ifndef OPENSSL_NO_TLS1_3 | |
514 | /* | |
515 | * TODO(TLS1.3): Do we want this list to be configurable? For now we always | |
516 | * just send both supported modes | |
517 | */ | |
518 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk_kex_modes) | |
519 | || !WPACKET_start_sub_packet_u16(pkt) | |
520 | || !WPACKET_start_sub_packet_u8(pkt) | |
521 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE_DHE) | |
522 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE) | |
523 | || !WPACKET_close(pkt) | |
524 | || !WPACKET_close(pkt)) { | |
525 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK_KEX_MODES, ERR_R_INTERNAL_ERROR); | |
b186a592 | 526 | return EXT_RETURN_FAIL; |
b2f7e8c0 | 527 | } |
b3ad72ce MC |
528 | |
529 | s->ext.psk_kex_mode = TLSEXT_KEX_MODE_FLAG_KE | TLSEXT_KEX_MODE_FLAG_KE_DHE; | |
b2f7e8c0 MC |
530 | #endif |
531 | ||
b186a592 | 532 | return EXT_RETURN_SENT; |
b2f7e8c0 MC |
533 | } |
534 | ||
3847d426 MC |
535 | #ifndef OPENSSL_NO_TLS1_3 |
536 | static int add_key_share(SSL *s, WPACKET *pkt, unsigned int curve_id) | |
537 | { | |
7b1ec1cf MC |
538 | unsigned char *encoded_point = NULL; |
539 | EVP_PKEY *key_share_key = NULL; | |
3847d426 MC |
540 | size_t encodedlen; |
541 | ||
7b1ec1cf | 542 | if (s->s3->tmp.pkey != NULL) { |
b77f3ed1 | 543 | if (!ossl_assert(s->hello_retry_request)) { |
7b1ec1cf | 544 | SSLerr(SSL_F_ADD_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
d8028b20 | 545 | return 0; |
7b1ec1cf MC |
546 | } |
547 | /* | |
548 | * Could happen if we got an HRR that wasn't requesting a new key_share | |
549 | */ | |
550 | key_share_key = s->s3->tmp.pkey; | |
551 | } else { | |
552 | key_share_key = ssl_generate_pkey_curve(curve_id); | |
553 | if (key_share_key == NULL) { | |
554 | SSLerr(SSL_F_ADD_KEY_SHARE, ERR_R_EVP_LIB); | |
d8028b20 | 555 | return 0; |
7b1ec1cf | 556 | } |
3847d426 MC |
557 | } |
558 | ||
559 | /* Encode the public key. */ | |
560 | encodedlen = EVP_PKEY_get1_tls_encodedpoint(key_share_key, | |
2248dbeb | 561 | &encoded_point); |
3847d426 MC |
562 | if (encodedlen == 0) { |
563 | SSLerr(SSL_F_ADD_KEY_SHARE, ERR_R_EC_LIB); | |
7b1ec1cf | 564 | goto err; |
3847d426 MC |
565 | } |
566 | ||
567 | /* Create KeyShareEntry */ | |
568 | if (!WPACKET_put_bytes_u16(pkt, curve_id) | |
2248dbeb | 569 | || !WPACKET_sub_memcpy_u16(pkt, encoded_point, encodedlen)) { |
3847d426 | 570 | SSLerr(SSL_F_ADD_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
7b1ec1cf | 571 | goto err; |
3847d426 MC |
572 | } |
573 | ||
574 | /* | |
575 | * TODO(TLS1.3): When changing to send more than one key_share we're | |
576 | * going to need to be able to save more than one EVP_PKEY. For now | |
577 | * we reuse the existing tmp.pkey | |
578 | */ | |
579 | s->s3->tmp.pkey = key_share_key; | |
580 | s->s3->group_id = curve_id; | |
2248dbeb | 581 | OPENSSL_free(encoded_point); |
3847d426 | 582 | |
d8028b20 | 583 | return 1; |
7b1ec1cf MC |
584 | err: |
585 | if (s->s3->tmp.pkey == NULL) | |
586 | EVP_PKEY_free(key_share_key); | |
587 | OPENSSL_free(encoded_point); | |
d8028b20 | 588 | return 0; |
3847d426 MC |
589 | } |
590 | #endif | |
591 | ||
b186a592 MC |
592 | EXT_RETURN tls_construct_ctos_key_share(SSL *s, WPACKET *pkt, |
593 | unsigned int context, X509 *x, | |
594 | size_t chainidx, int *al) | |
ab83e314 | 595 | { |
3cf96e88 | 596 | #ifndef OPENSSL_NO_TLS1_3 |
3847d426 | 597 | size_t i, num_curves = 0; |
ab83e314 | 598 | const unsigned char *pcurves = NULL; |
3847d426 | 599 | unsigned int curve_id = 0; |
ab83e314 MC |
600 | |
601 | /* key_share extension */ | |
602 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
603 | /* Extension data sub-packet */ | |
604 | || !WPACKET_start_sub_packet_u16(pkt) | |
605 | /* KeyShare list sub-packet */ | |
606 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 607 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
b186a592 | 608 | return EXT_RETURN_FAIL; |
ab83e314 MC |
609 | } |
610 | ||
ab83e314 | 611 | if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) { |
7fe97c07 | 612 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
b186a592 | 613 | return EXT_RETURN_FAIL; |
ab83e314 MC |
614 | } |
615 | ||
616 | /* | |
617 | * TODO(TLS1.3): Make the number of key_shares sent configurable. For | |
618 | * now, just send one | |
619 | */ | |
3847d426 MC |
620 | if (s->s3->group_id != 0) { |
621 | curve_id = s->s3->group_id; | |
622 | } else { | |
623 | for (i = 0; i < num_curves; i++, pcurves += 2) { | |
ab83e314 | 624 | |
3847d426 MC |
625 | if (!tls_curve_allowed(s, pcurves, SSL_SECOP_CURVE_SUPPORTED)) |
626 | continue; | |
ab83e314 | 627 | |
0dd7ba24 | 628 | curve_id = bytestogroup(pcurves); |
3847d426 | 629 | break; |
ab83e314 | 630 | } |
3847d426 | 631 | } |
ab83e314 | 632 | |
3847d426 MC |
633 | if (curve_id == 0) { |
634 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, SSL_R_NO_SUITABLE_KEY_SHARE); | |
b186a592 | 635 | return EXT_RETURN_FAIL; |
ab83e314 MC |
636 | } |
637 | ||
3847d426 | 638 | if (!add_key_share(s, pkt, curve_id)) |
b186a592 | 639 | return EXT_RETURN_FAIL; |
3847d426 | 640 | |
ab83e314 | 641 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { |
7fe97c07 | 642 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
b186a592 | 643 | return EXT_RETURN_FAIL; |
ab83e314 | 644 | } |
3cf96e88 | 645 | #endif |
ab83e314 | 646 | |
b186a592 | 647 | return EXT_RETURN_SENT; |
ab83e314 MC |
648 | } |
649 | ||
b186a592 MC |
650 | EXT_RETURN tls_construct_ctos_cookie(SSL *s, WPACKET *pkt, unsigned int context, |
651 | X509 *x, size_t chainidx, int *al) | |
cfef5027 | 652 | { |
b186a592 | 653 | EXT_RETURN ret = EXT_RETURN_FAIL; |
cfef5027 MC |
654 | |
655 | /* Should only be set if we've had an HRR */ | |
656 | if (s->ext.tls13_cookie_len == 0) | |
b186a592 | 657 | return EXT_RETURN_NOT_SENT; |
cfef5027 MC |
658 | |
659 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_cookie) | |
660 | /* Extension data sub-packet */ | |
661 | || !WPACKET_start_sub_packet_u16(pkt) | |
662 | || !WPACKET_sub_memcpy_u16(pkt, s->ext.tls13_cookie, | |
663 | s->ext.tls13_cookie_len) | |
664 | || !WPACKET_close(pkt)) { | |
665 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_COOKIE, ERR_R_INTERNAL_ERROR); | |
666 | goto end; | |
667 | } | |
668 | ||
b186a592 | 669 | ret = EXT_RETURN_SENT; |
cfef5027 MC |
670 | end: |
671 | OPENSSL_free(s->ext.tls13_cookie); | |
febb0afa | 672 | s->ext.tls13_cookie = NULL; |
cfef5027 MC |
673 | s->ext.tls13_cookie_len = 0; |
674 | ||
675 | return ret; | |
676 | } | |
677 | ||
b186a592 MC |
678 | EXT_RETURN tls_construct_ctos_early_data(SSL *s, WPACKET *pkt, |
679 | unsigned int context, X509 *x, | |
680 | size_t chainidx, int *al) | |
38df5a45 MC |
681 | { |
682 | if (s->early_data_state != SSL_EARLY_DATA_CONNECTING | |
683 | || s->session->ext.max_early_data == 0) { | |
684 | s->max_early_data = 0; | |
b186a592 | 685 | return EXT_RETURN_NOT_SENT; |
38df5a45 MC |
686 | } |
687 | s->max_early_data = s->session->ext.max_early_data; | |
688 | ||
689 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) | |
690 | || !WPACKET_start_sub_packet_u16(pkt) | |
691 | || !WPACKET_close(pkt)) { | |
692 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, ERR_R_INTERNAL_ERROR); | |
b186a592 | 693 | return EXT_RETURN_FAIL; |
38df5a45 MC |
694 | } |
695 | ||
696 | /* | |
697 | * We set this to rejected here. Later, if the server acknowledges the | |
698 | * extension, we set it to accepted. | |
699 | */ | |
700 | s->ext.early_data = SSL_EARLY_DATA_REJECTED; | |
701 | ||
b186a592 | 702 | return EXT_RETURN_SENT; |
38df5a45 MC |
703 | } |
704 | ||
1266eefd MC |
705 | #define F5_WORKAROUND_MIN_MSG_LEN 0xff |
706 | #define F5_WORKAROUND_MAX_MSG_LEN 0x200 | |
707 | ||
d702ad12 MC |
708 | /* |
709 | * PSK pre binder overhead = | |
710 | * 2 bytes for TLSEXT_TYPE_psk | |
711 | * 2 bytes for extension length | |
712 | * 2 bytes for identities list length | |
713 | * 2 bytes for identity length | |
714 | * 4 bytes for obfuscated_ticket_age | |
715 | * 2 bytes for binder list length | |
716 | * 1 byte for binder length | |
717 | * The above excludes the number of bytes for the identity itself and the | |
718 | * subsequent binder bytes | |
719 | */ | |
720 | #define PSK_PRE_BINDER_OVERHEAD (2 + 2 + 2 + 2 + 4 + 2 + 1) | |
721 | ||
b186a592 MC |
722 | EXT_RETURN tls_construct_ctos_padding(SSL *s, WPACKET *pkt, |
723 | unsigned int context, X509 *x, | |
724 | size_t chainidx, int *al) | |
ab83e314 MC |
725 | { |
726 | unsigned char *padbytes; | |
727 | size_t hlen; | |
728 | ||
729 | if ((s->options & SSL_OP_TLSEXT_PADDING) == 0) | |
b186a592 | 730 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
731 | |
732 | /* | |
d702ad12 MC |
733 | * Add padding to workaround bugs in F5 terminators. See RFC7685. |
734 | * This code calculates the length of all extensions added so far but | |
735 | * excludes the PSK extension (because that MUST be written last). Therefore | |
736 | * this extension MUST always appear second to last. | |
ab83e314 MC |
737 | */ |
738 | if (!WPACKET_get_total_written(pkt, &hlen)) { | |
7fe97c07 | 739 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING, ERR_R_INTERNAL_ERROR); |
b186a592 | 740 | return EXT_RETURN_FAIL; |
ab83e314 MC |
741 | } |
742 | ||
d702ad12 MC |
743 | /* |
744 | * If we're going to send a PSK then that will be written out after this | |
745 | * extension, so we need to calculate how long it is going to be. | |
746 | */ | |
747 | if (s->session->ssl_version == TLS1_3_VERSION | |
748 | && s->session->ext.ticklen != 0 | |
749 | && s->session->cipher != NULL) { | |
750 | const EVP_MD *md = ssl_md(s->session->cipher->algorithm2); | |
751 | ||
752 | if (md != NULL) { | |
753 | /* | |
754 | * Add the fixed PSK overhead, the identity length and the binder | |
755 | * length. | |
756 | */ | |
757 | hlen += PSK_PRE_BINDER_OVERHEAD + s->session->ext.ticklen | |
758 | + EVP_MD_size(md); | |
759 | } | |
760 | } | |
761 | ||
1266eefd | 762 | if (hlen > F5_WORKAROUND_MIN_MSG_LEN && hlen < F5_WORKAROUND_MAX_MSG_LEN) { |
1ee4b98e | 763 | /* Calculate the amount of padding we need to add */ |
1266eefd MC |
764 | hlen = F5_WORKAROUND_MAX_MSG_LEN - hlen; |
765 | ||
766 | /* | |
767 | * Take off the size of extension header itself (2 bytes for type and | |
768 | * 2 bytes for length bytes) | |
769 | */ | |
ab83e314 MC |
770 | if (hlen >= 4) |
771 | hlen -= 4; | |
772 | else | |
773 | hlen = 0; | |
774 | ||
775 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_padding) | |
776 | || !WPACKET_sub_allocate_bytes_u16(pkt, hlen, &padbytes)) { | |
7fe97c07 | 777 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
778 | return 0; |
779 | } | |
780 | memset(padbytes, 0, hlen); | |
781 | } | |
782 | ||
b186a592 | 783 | return EXT_RETURN_SENT; |
ab83e314 MC |
784 | } |
785 | ||
ec15acb6 MC |
786 | /* |
787 | * Construct the pre_shared_key extension | |
788 | */ | |
b186a592 MC |
789 | EXT_RETURN tls_construct_ctos_psk(SSL *s, WPACKET *pkt, unsigned int context, |
790 | X509 *x, size_t chainidx, int *al) | |
ec15acb6 MC |
791 | { |
792 | #ifndef OPENSSL_NO_TLS1_3 | |
40f805ad | 793 | uint32_t now, agesec, agems; |
9368f865 MC |
794 | size_t reshashsize, pskhashsize, binderoffset, msglen, idlen; |
795 | unsigned char *resbinder = NULL, *pskbinder = NULL, *msgstart = NULL; | |
796 | const unsigned char *id; | |
797 | const EVP_MD *handmd = NULL, *mdres, *mdpsk; | |
b186a592 | 798 | EXT_RETURN ret = EXT_RETURN_FAIL; |
9368f865 MC |
799 | SSL_SESSION *psksess = NULL; |
800 | int dores = 0; | |
ec15acb6 MC |
801 | |
802 | s->session->ext.tick_identity = TLSEXT_PSK_BAD_IDENTITY; | |
803 | ||
d702ad12 MC |
804 | /* |
805 | * Note: At this stage of the code we only support adding a single | |
806 | * resumption PSK. If we add support for multiple PSKs then the length | |
807 | * calculations in the padding extension will need to be adjusted. | |
808 | */ | |
809 | ||
ec15acb6 | 810 | /* |
08191294 MC |
811 | * If this is an incompatible or new session then we have nothing to resume |
812 | * so don't add this extension. | |
ec15acb6 | 813 | */ |
08191294 | 814 | if (s->session->ssl_version != TLS1_3_VERSION |
9368f865 | 815 | || (s->session->ext.ticklen == 0 && s->psk_use_session_cb == NULL)) |
b186a592 | 816 | return EXT_RETURN_NOT_SENT; |
ec15acb6 | 817 | |
9368f865 MC |
818 | if (s->hello_retry_request) |
819 | handmd = ssl_handshake_md(s); | |
820 | ||
821 | if (s->psk_use_session_cb != NULL | |
822 | && !s->psk_use_session_cb(s, handmd, &id, &idlen, &psksess)) { | |
823 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, SSL_R_BAD_PSK); | |
40f805ad MC |
824 | goto err; |
825 | } | |
826 | ||
9368f865 MC |
827 | if (s->session->ext.ticklen != 0) { |
828 | if (s->session->cipher == NULL) { | |
829 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR); | |
830 | goto err; | |
831 | } | |
832 | ||
833 | mdres = ssl_md(s->session->cipher->algorithm2); | |
834 | if (mdres == NULL) { | |
835 | /* Don't recognize this cipher so we can't use the session. Ignore it */ | |
836 | goto dopsksess; | |
837 | } | |
838 | ||
839 | if (s->hello_retry_request && mdres != handmd) { | |
840 | /* | |
841 | * Selected ciphersuite hash does not match the hash for the session so | |
842 | * we can't use it. | |
843 | */ | |
844 | goto dopsksess; | |
845 | } | |
1f5b44e9 | 846 | |
cf3e221b | 847 | /* |
9368f865 MC |
848 | * Technically the C standard just says time() returns a time_t and says |
849 | * nothing about the encoding of that type. In practice most implementations | |
850 | * follow POSIX which holds it as an integral type in seconds since epoch. | |
851 | * We've already made the assumption that we can do this in multiple places | |
852 | * in the code, so portability shouldn't be an issue. | |
cf3e221b | 853 | */ |
9368f865 MC |
854 | now = (uint32_t)time(NULL); |
855 | agesec = now - (uint32_t)s->session->time; | |
cf3e221b | 856 | |
9368f865 MC |
857 | if (s->session->ext.tick_lifetime_hint < agesec) { |
858 | /* Ticket is too old. Ignore it. */ | |
859 | goto dopsksess; | |
860 | } | |
ec15acb6 | 861 | |
9368f865 MC |
862 | /* |
863 | * Calculate age in ms. We're just doing it to nearest second. Should be | |
864 | * good enough. | |
865 | */ | |
866 | agems = agesec * (uint32_t)1000; | |
fc24f0bf | 867 | |
9368f865 MC |
868 | if (agesec != 0 && agems / (uint32_t)1000 != agesec) { |
869 | /* | |
870 | * Overflow. Shouldn't happen unless this is a *really* old session. If | |
871 | * so we just ignore it. | |
872 | */ | |
873 | goto dopsksess; | |
874 | } | |
ec15acb6 | 875 | |
ec15acb6 | 876 | /* |
9368f865 MC |
877 | * Obfuscate the age. Overflow here is fine, this addition is supposed to |
878 | * be mod 2^32. | |
ec15acb6 | 879 | */ |
9368f865 MC |
880 | agems += s->session->ext.tick_age_add; |
881 | ||
882 | reshashsize = EVP_MD_size(mdres); | |
883 | dores = 1; | |
ec15acb6 MC |
884 | } |
885 | ||
9368f865 MC |
886 | dopsksess: |
887 | if (!dores && psksess == NULL) | |
888 | return EXT_RETURN_NOT_SENT; | |
ec15acb6 | 889 | |
9368f865 MC |
890 | if (psksess != NULL) { |
891 | mdpsk = ssl_md(psksess->cipher->algorithm2); | |
892 | if (mdpsk == NULL) { | |
893 | /* | |
894 | * Don't recognize this cipher so we can't use the session. | |
895 | * If this happens it's an application bug. | |
896 | */ | |
897 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, SSL_R_BAD_PSK); | |
898 | goto err; | |
899 | } | |
900 | ||
011d768a | 901 | if (s->hello_retry_request && mdpsk != handmd) { |
9368f865 MC |
902 | /* |
903 | * Selected ciphersuite hash does not match the hash for the PSK | |
904 | * session. This is an application bug. | |
905 | */ | |
906 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, SSL_R_BAD_PSK); | |
907 | goto err; | |
908 | } | |
909 | ||
910 | pskhashsize = EVP_MD_size(mdpsk); | |
911 | } | |
ec15acb6 MC |
912 | |
913 | /* Create the extension, but skip over the binder for now */ | |
914 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk) | |
915 | || !WPACKET_start_sub_packet_u16(pkt) | |
9368f865 MC |
916 | || !WPACKET_start_sub_packet_u16(pkt)) { |
917 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR); | |
918 | goto err; | |
919 | } | |
920 | ||
921 | if (dores) { | |
922 | if (!WPACKET_sub_memcpy_u16(pkt, s->session->ext.tick, | |
923 | s->session->ext.ticklen) | |
924 | || !WPACKET_put_bytes_u32(pkt, agems)) { | |
925 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR); | |
926 | goto err; | |
927 | } | |
928 | } | |
929 | ||
930 | if (psksess != NULL) { | |
931 | if (!WPACKET_sub_memcpy_u16(pkt, id, idlen) | |
932 | || !WPACKET_put_bytes_u32(pkt, 0)) { | |
933 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR); | |
934 | goto err; | |
935 | } | |
936 | } | |
937 | ||
938 | if (!WPACKET_close(pkt) | |
ec15acb6 MC |
939 | || !WPACKET_get_total_written(pkt, &binderoffset) |
940 | || !WPACKET_start_sub_packet_u16(pkt) | |
9368f865 MC |
941 | || (dores |
942 | && !WPACKET_sub_allocate_bytes_u8(pkt, reshashsize, &resbinder)) | |
943 | || (psksess != NULL | |
944 | && !WPACKET_sub_allocate_bytes_u8(pkt, pskhashsize, &pskbinder)) | |
ec15acb6 MC |
945 | || !WPACKET_close(pkt) |
946 | || !WPACKET_close(pkt) | |
947 | || !WPACKET_get_total_written(pkt, &msglen) | |
948 | /* | |
949 | * We need to fill in all the sub-packet lengths now so we can | |
950 | * calculate the HMAC of the message up to the binders | |
951 | */ | |
952 | || !WPACKET_fill_lengths(pkt)) { | |
953 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR); | |
954 | goto err; | |
955 | } | |
956 | ||
957 | msgstart = WPACKET_get_curr(pkt) - msglen; | |
958 | ||
9368f865 MC |
959 | if (dores && tls_psk_do_binder(s, mdres, msgstart, binderoffset, NULL, |
960 | resbinder, s->session, 1, 0) != 1) { | |
ec15acb6 MC |
961 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR); |
962 | goto err; | |
963 | } | |
964 | ||
9368f865 MC |
965 | if (psksess != NULL && tls_psk_do_binder(s, mdpsk, msgstart, |
966 | binderoffset, NULL, pskbinder, | |
967 | psksess, 1, 1) != 1) { | |
968 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR); | |
969 | goto err; | |
970 | } | |
971 | ||
972 | if (dores) | |
973 | s->session->ext.tick_identity = 0; | |
011d768a | 974 | SSL_SESSION_free(s->psksession); |
9368f865 MC |
975 | s->psksession = psksess; |
976 | if (psksess != NULL) | |
977 | s->psksession->ext.tick_identity = (dores ? 1 : 0); | |
011d768a | 978 | psksess = NULL; |
ec15acb6 | 979 | |
b186a592 | 980 | ret = EXT_RETURN_SENT; |
ec15acb6 | 981 | err: |
011d768a | 982 | SSL_SESSION_free(psksess); |
ec15acb6 MC |
983 | return ret; |
984 | #else | |
985 | return 1; | |
986 | #endif | |
987 | } | |
988 | ||
6dd083fd MC |
989 | /* |
990 | * Parse the server's renegotiation binding and abort if it's not right | |
991 | */ | |
61138358 MC |
992 | int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, unsigned int context, |
993 | X509 *x, size_t chainidx, int *al) | |
6dd083fd MC |
994 | { |
995 | size_t expected_len = s->s3->previous_client_finished_len | |
996 | + s->s3->previous_server_finished_len; | |
997 | size_t ilen; | |
998 | const unsigned char *data; | |
999 | ||
1000 | /* Check for logic errors */ | |
b77f3ed1 MC |
1001 | if (!ossl_assert(expected_len == 0 |
1002 | || s->s3->previous_client_finished_len != 0) | |
1003 | || !ossl_assert(expected_len == 0 | |
1004 | || s->s3->previous_server_finished_len != 0)) { | |
1005 | *al = SSL_AD_INTERNAL_ERROR; | |
1006 | return 0; | |
1007 | } | |
6dd083fd MC |
1008 | |
1009 | /* Parse the length byte */ | |
1010 | if (!PACKET_get_1_len(pkt, &ilen)) { | |
7fe97c07 | 1011 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd | 1012 | SSL_R_RENEGOTIATION_ENCODING_ERR); |
fb34a0f4 | 1013 | *al = SSL_AD_DECODE_ERROR; |
6dd083fd MC |
1014 | return 0; |
1015 | } | |
1016 | ||
1017 | /* Consistency check */ | |
1018 | if (PACKET_remaining(pkt) != ilen) { | |
7fe97c07 | 1019 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd | 1020 | SSL_R_RENEGOTIATION_ENCODING_ERR); |
fb34a0f4 | 1021 | *al = SSL_AD_DECODE_ERROR; |
6dd083fd MC |
1022 | return 0; |
1023 | } | |
1024 | ||
1025 | /* Check that the extension matches */ | |
1026 | if (ilen != expected_len) { | |
7fe97c07 | 1027 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd | 1028 | SSL_R_RENEGOTIATION_MISMATCH); |
fb34a0f4 | 1029 | *al = SSL_AD_ILLEGAL_PARAMETER; |
6dd083fd MC |
1030 | return 0; |
1031 | } | |
1032 | ||
1033 | if (!PACKET_get_bytes(pkt, &data, s->s3->previous_client_finished_len) | |
1034 | || memcmp(data, s->s3->previous_client_finished, | |
1035 | s->s3->previous_client_finished_len) != 0) { | |
7fe97c07 | 1036 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd | 1037 | SSL_R_RENEGOTIATION_MISMATCH); |
fb34a0f4 | 1038 | *al = SSL_AD_ILLEGAL_PARAMETER; |
6dd083fd MC |
1039 | return 0; |
1040 | } | |
1041 | ||
1042 | if (!PACKET_get_bytes(pkt, &data, s->s3->previous_server_finished_len) | |
1043 | || memcmp(data, s->s3->previous_server_finished, | |
1044 | s->s3->previous_server_finished_len) != 0) { | |
7fe97c07 | 1045 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
1046 | SSL_R_RENEGOTIATION_MISMATCH); |
1047 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
1048 | return 0; | |
1049 | } | |
1050 | s->s3->send_connection_binding = 1; | |
1051 | ||
1052 | return 1; | |
1053 | } | |
1054 | ||
61138358 MC |
1055 | int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, unsigned int context, |
1056 | X509 *x, size_t chainidx, int *al) | |
6dd083fd | 1057 | { |
fb34a0f4 MC |
1058 | if (s->ext.hostname == NULL) { |
1059 | *al = SSL_AD_INTERNAL_ERROR; | |
1060 | return 0; | |
1061 | } | |
1062 | ||
1063 | if (PACKET_remaining(pkt) > 0) { | |
1064 | *al = SSL_AD_DECODE_ERROR; | |
6dd083fd MC |
1065 | return 0; |
1066 | } | |
1067 | ||
1068 | if (!s->hit) { | |
aff8c126 | 1069 | if (s->session->ext.hostname != NULL) { |
6dd083fd MC |
1070 | *al = SSL_AD_INTERNAL_ERROR; |
1071 | return 0; | |
1072 | } | |
aff8c126 RS |
1073 | s->session->ext.hostname = OPENSSL_strdup(s->ext.hostname); |
1074 | if (s->session->ext.hostname == NULL) { | |
6dd083fd MC |
1075 | *al = SSL_AD_INTERNAL_ERROR; |
1076 | return 0; | |
1077 | } | |
1078 | } | |
1079 | ||
1080 | return 1; | |
1081 | } | |
1082 | ||
1083 | #ifndef OPENSSL_NO_EC | |
61138358 MC |
1084 | int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context, |
1085 | X509 *x, size_t chainidx, int *al) | |
6dd083fd | 1086 | { |
aff8c126 | 1087 | unsigned int ecpointformats_len; |
6dd083fd MC |
1088 | PACKET ecptformatlist; |
1089 | ||
1090 | if (!PACKET_as_length_prefixed_1(pkt, &ecptformatlist)) { | |
1091 | *al = SSL_AD_DECODE_ERROR; | |
1092 | return 0; | |
1093 | } | |
1094 | if (!s->hit) { | |
aff8c126 RS |
1095 | ecpointformats_len = PACKET_remaining(&ecptformatlist); |
1096 | s->session->ext.ecpointformats_len = 0; | |
6dd083fd | 1097 | |
aff8c126 RS |
1098 | OPENSSL_free(s->session->ext.ecpointformats); |
1099 | s->session->ext.ecpointformats = OPENSSL_malloc(ecpointformats_len); | |
1100 | if (s->session->ext.ecpointformats == NULL) { | |
6dd083fd MC |
1101 | *al = SSL_AD_INTERNAL_ERROR; |
1102 | return 0; | |
1103 | } | |
1104 | ||
aff8c126 | 1105 | s->session->ext.ecpointformats_len = ecpointformats_len; |
6dd083fd MC |
1106 | |
1107 | if (!PACKET_copy_bytes(&ecptformatlist, | |
aff8c126 RS |
1108 | s->session->ext.ecpointformats, |
1109 | ecpointformats_len)) { | |
6dd083fd MC |
1110 | *al = SSL_AD_INTERNAL_ERROR; |
1111 | return 0; | |
1112 | } | |
1113 | } | |
1114 | ||
1115 | return 1; | |
1116 | } | |
1117 | #endif | |
1118 | ||
61138358 MC |
1119 | int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, unsigned int context, |
1120 | X509 *x, size_t chainidx, int *al) | |
6dd083fd | 1121 | { |
aff8c126 RS |
1122 | if (s->ext.session_ticket_cb != NULL && |
1123 | !s->ext.session_ticket_cb(s, PACKET_data(pkt), | |
1124 | PACKET_remaining(pkt), | |
1125 | s->ext.session_ticket_cb_arg)) { | |
6dd083fd MC |
1126 | *al = SSL_AD_INTERNAL_ERROR; |
1127 | return 0; | |
1128 | } | |
1266eefd | 1129 | |
fb34a0f4 | 1130 | if (!tls_use_ticket(s)) { |
6dd083fd MC |
1131 | *al = SSL_AD_UNSUPPORTED_EXTENSION; |
1132 | return 0; | |
1133 | } | |
fb34a0f4 MC |
1134 | if (PACKET_remaining(pkt) > 0) { |
1135 | *al = SSL_AD_DECODE_ERROR; | |
1136 | return 0; | |
1137 | } | |
1266eefd | 1138 | |
aff8c126 | 1139 | s->ext.ticket_expected = 1; |
6dd083fd MC |
1140 | |
1141 | return 1; | |
1142 | } | |
1143 | ||
ab83e314 | 1144 | #ifndef OPENSSL_NO_OCSP |
61138358 MC |
1145 | int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, unsigned int context, |
1146 | X509 *x, size_t chainidx, int *al) | |
6dd083fd MC |
1147 | { |
1148 | /* | |
f63e4288 MC |
1149 | * MUST only be sent if we've requested a status |
1150 | * request message. In TLS <= 1.2 it must also be empty. | |
6dd083fd | 1151 | */ |
fb34a0f4 | 1152 | if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) { |
6dd083fd MC |
1153 | *al = SSL_AD_UNSUPPORTED_EXTENSION; |
1154 | return 0; | |
1155 | } | |
fb34a0f4 MC |
1156 | if (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) > 0) { |
1157 | *al = SSL_AD_DECODE_ERROR; | |
1158 | return 0; | |
1159 | } | |
f63e4288 MC |
1160 | |
1161 | if (SSL_IS_TLS13(s)) { | |
1162 | /* We only know how to handle this if it's for the first Certificate in | |
1ee4b98e | 1163 | * the chain. We ignore any other responses. |
f63e4288 | 1164 | */ |
8521ced6 | 1165 | if (chainidx != 0) |
f63e4288 MC |
1166 | return 1; |
1167 | return tls_process_cert_status_body(s, pkt, al); | |
1168 | } | |
1169 | ||
6dd083fd | 1170 | /* Set flag to expect CertificateStatus message */ |
aff8c126 | 1171 | s->ext.status_expected = 1; |
6dd083fd MC |
1172 | |
1173 | return 1; | |
1174 | } | |
ab83e314 | 1175 | #endif |
6dd083fd MC |
1176 | |
1177 | ||
1178 | #ifndef OPENSSL_NO_CT | |
61138358 MC |
1179 | int tls_parse_stoc_sct(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1180 | size_t chainidx, int *al) | |
6dd083fd MC |
1181 | { |
1182 | /* | |
1183 | * Only take it if we asked for it - i.e if there is no CT validation | |
1184 | * callback set, then a custom extension MAY be processing it, so we | |
1185 | * need to let control continue to flow to that. | |
1186 | */ | |
1187 | if (s->ct_validation_callback != NULL) { | |
1188 | size_t size = PACKET_remaining(pkt); | |
1189 | ||
1190 | /* Simply copy it off for later processing */ | |
aff8c126 RS |
1191 | OPENSSL_free(s->ext.scts); |
1192 | s->ext.scts = NULL; | |
1266eefd | 1193 | |
aff8c126 | 1194 | s->ext.scts_len = size; |
6dd083fd | 1195 | if (size > 0) { |
aff8c126 RS |
1196 | s->ext.scts = OPENSSL_malloc(size); |
1197 | if (s->ext.scts == NULL | |
1198 | || !PACKET_copy_bytes(pkt, s->ext.scts, size)) { | |
6dd083fd MC |
1199 | *al = SSL_AD_INTERNAL_ERROR; |
1200 | return 0; | |
1201 | } | |
1202 | } | |
1203 | } else { | |
b186a592 MC |
1204 | ENDPOINT role = (context & SSL_EXT_TLS1_2_SERVER_HELLO) != 0 |
1205 | ? ENDPOINT_CLIENT : ENDPOINT_BOTH; | |
1206 | ||
1207 | /* | |
1208 | * If we didn't ask for it then there must be a custom extension, | |
1209 | * otherwise this is unsolicited. | |
1210 | */ | |
1211 | if (custom_ext_find(&s->cert->custext, role, | |
1212 | TLSEXT_TYPE_signed_certificate_timestamp, | |
1213 | NULL) == NULL) { | |
1214 | *al = TLS1_AD_UNSUPPORTED_EXTENSION; | |
1215 | return 0; | |
1216 | } | |
1217 | ||
43ae5eed MC |
1218 | if (custom_ext_parse(s, context, |
1219 | TLSEXT_TYPE_signed_certificate_timestamp, | |
1220 | PACKET_data(pkt), PACKET_remaining(pkt), | |
1221 | x, chainidx, al) <= 0) | |
6dd083fd MC |
1222 | return 0; |
1223 | } | |
1224 | ||
1225 | return 1; | |
1226 | } | |
1227 | #endif | |
1228 | ||
1229 | ||
1230 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
1231 | /* | |
1232 | * ssl_next_proto_validate validates a Next Protocol Negotiation block. No | |
1233 | * elements of zero length are allowed and the set of elements must exactly | |
1234 | * fill the length of the block. Returns 1 on success or 0 on failure. | |
1235 | */ | |
1236 | static int ssl_next_proto_validate(PACKET *pkt) | |
1237 | { | |
1238 | PACKET tmp_protocol; | |
1239 | ||
1240 | while (PACKET_remaining(pkt)) { | |
1241 | if (!PACKET_get_length_prefixed_1(pkt, &tmp_protocol) | |
1242 | || PACKET_remaining(&tmp_protocol) == 0) | |
1243 | return 0; | |
1244 | } | |
1245 | ||
1246 | return 1; | |
1247 | } | |
1248 | ||
61138358 MC |
1249 | int tls_parse_stoc_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1250 | size_t chainidx, int *al) | |
6dd083fd MC |
1251 | { |
1252 | unsigned char *selected; | |
1253 | unsigned char selected_len; | |
1254 | PACKET tmppkt; | |
1255 | ||
1266eefd | 1256 | /* Check if we are in a renegotiation. If so ignore this extension */ |
c7f47786 | 1257 | if (!SSL_IS_FIRST_HANDSHAKE(s)) |
6dd083fd MC |
1258 | return 1; |
1259 | ||
1260 | /* We must have requested it. */ | |
aff8c126 | 1261 | if (s->ctx->ext.npn_select_cb == NULL) { |
6dd083fd MC |
1262 | *al = SSL_AD_UNSUPPORTED_EXTENSION; |
1263 | return 0; | |
1264 | } | |
1266eefd | 1265 | |
6dd083fd MC |
1266 | /* The data must be valid */ |
1267 | tmppkt = *pkt; | |
1268 | if (!ssl_next_proto_validate(&tmppkt)) { | |
1269 | *al = SSL_AD_DECODE_ERROR; | |
1270 | return 0; | |
1271 | } | |
aff8c126 RS |
1272 | if (s->ctx->ext.npn_select_cb(s, &selected, &selected_len, |
1273 | PACKET_data(pkt), | |
1274 | PACKET_remaining(pkt), | |
1275 | s->ctx->ext.npn_select_cb_arg) != | |
6dd083fd MC |
1276 | SSL_TLSEXT_ERR_OK) { |
1277 | *al = SSL_AD_INTERNAL_ERROR; | |
1278 | return 0; | |
1279 | } | |
1266eefd | 1280 | |
6dd083fd MC |
1281 | /* |
1282 | * Could be non-NULL if server has sent multiple NPN extensions in | |
1283 | * a single Serverhello | |
1284 | */ | |
aff8c126 RS |
1285 | OPENSSL_free(s->ext.npn); |
1286 | s->ext.npn = OPENSSL_malloc(selected_len); | |
1287 | if (s->ext.npn == NULL) { | |
6dd083fd MC |
1288 | *al = SSL_AD_INTERNAL_ERROR; |
1289 | return 0; | |
1290 | } | |
1291 | ||
aff8c126 RS |
1292 | memcpy(s->ext.npn, selected, selected_len); |
1293 | s->ext.npn_len = selected_len; | |
1294 | s->s3->npn_seen = 1; | |
6dd083fd MC |
1295 | |
1296 | return 1; | |
1297 | } | |
1298 | #endif | |
1299 | ||
61138358 MC |
1300 | int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1301 | size_t chainidx, int *al) | |
6dd083fd MC |
1302 | { |
1303 | size_t len; | |
1304 | ||
1305 | /* We must have requested it. */ | |
1306 | if (!s->s3->alpn_sent) { | |
1307 | *al = SSL_AD_UNSUPPORTED_EXTENSION; | |
1308 | return 0; | |
1309 | } | |
1310 | /*- | |
1311 | * The extension data consists of: | |
1312 | * uint16 list_length | |
1313 | * uint8 proto_length; | |
1314 | * uint8 proto[proto_length]; | |
1315 | */ | |
1316 | if (!PACKET_get_net_2_len(pkt, &len) | |
1317 | || PACKET_remaining(pkt) != len || !PACKET_get_1_len(pkt, &len) | |
1318 | || PACKET_remaining(pkt) != len) { | |
1319 | *al = SSL_AD_DECODE_ERROR; | |
1320 | return 0; | |
1321 | } | |
1322 | OPENSSL_free(s->s3->alpn_selected); | |
1323 | s->s3->alpn_selected = OPENSSL_malloc(len); | |
1324 | if (s->s3->alpn_selected == NULL) { | |
1325 | *al = SSL_AD_INTERNAL_ERROR; | |
1326 | return 0; | |
1327 | } | |
1328 | if (!PACKET_copy_bytes(pkt, s->s3->alpn_selected, len)) { | |
1329 | *al = SSL_AD_DECODE_ERROR; | |
1330 | return 0; | |
1331 | } | |
1332 | s->s3->alpn_selected_len = len; | |
1333 | ||
1334 | return 1; | |
1335 | } | |
1336 | ||
1337 | #ifndef OPENSSL_NO_SRTP | |
61138358 MC |
1338 | int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1339 | size_t chainidx, int *al) | |
6dd083fd MC |
1340 | { |
1341 | unsigned int id, ct, mki; | |
1342 | int i; | |
1343 | STACK_OF(SRTP_PROTECTION_PROFILE) *clnt; | |
1344 | SRTP_PROTECTION_PROFILE *prof; | |
1345 | ||
1266eefd MC |
1346 | if (!PACKET_get_net_2(pkt, &ct) || ct != 2 |
1347 | || !PACKET_get_net_2(pkt, &id) | |
1348 | || !PACKET_get_1(pkt, &mki) | |
1349 | || PACKET_remaining(pkt) != 0) { | |
7fe97c07 | 1350 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, |
6dd083fd MC |
1351 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
1352 | *al = SSL_AD_DECODE_ERROR; | |
1353 | return 0; | |
1354 | } | |
1355 | ||
1356 | if (mki != 0) { | |
1357 | /* Must be no MKI, since we never offer one */ | |
7fe97c07 | 1358 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, SSL_R_BAD_SRTP_MKI_VALUE); |
6dd083fd MC |
1359 | *al = SSL_AD_ILLEGAL_PARAMETER; |
1360 | return 0; | |
1361 | } | |
1362 | ||
6dd083fd | 1363 | /* Throw an error if the server gave us an unsolicited extension */ |
1266eefd | 1364 | clnt = SSL_get_srtp_profiles(s); |
6dd083fd | 1365 | if (clnt == NULL) { |
7fe97c07 | 1366 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, SSL_R_NO_SRTP_PROFILES); |
6dd083fd MC |
1367 | *al = SSL_AD_DECODE_ERROR; |
1368 | return 0; | |
1369 | } | |
1370 | ||
1371 | /* | |
1372 | * Check to see if the server gave us something we support (and | |
1373 | * presumably offered) | |
1374 | */ | |
1375 | for (i = 0; i < sk_SRTP_PROTECTION_PROFILE_num(clnt); i++) { | |
1376 | prof = sk_SRTP_PROTECTION_PROFILE_value(clnt, i); | |
1377 | ||
1378 | if (prof->id == id) { | |
1379 | s->srtp_profile = prof; | |
1380 | *al = 0; | |
1381 | return 1; | |
1382 | } | |
1383 | } | |
1384 | ||
7fe97c07 | 1385 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, |
6dd083fd MC |
1386 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
1387 | *al = SSL_AD_DECODE_ERROR; | |
1388 | return 0; | |
1389 | } | |
1390 | #endif | |
1391 | ||
61138358 MC |
1392 | int tls_parse_stoc_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1393 | size_t chainidx, int *al) | |
6dd083fd MC |
1394 | { |
1395 | /* Ignore if inappropriate ciphersuite */ | |
1396 | if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC) | |
1397 | && s->s3->tmp.new_cipher->algorithm_mac != SSL_AEAD | |
1398 | && s->s3->tmp.new_cipher->algorithm_enc != SSL_RC4) | |
28a31a0a | 1399 | s->ext.use_etm = 1; |
6dd083fd MC |
1400 | |
1401 | return 1; | |
1402 | } | |
1403 | ||
61138358 MC |
1404 | int tls_parse_stoc_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1405 | size_t chainidx, int *al) | |
6dd083fd MC |
1406 | { |
1407 | s->s3->flags |= TLS1_FLAGS_RECEIVED_EXTMS; | |
1408 | if (!s->hit) | |
1409 | s->session->flags |= SSL_SESS_FLAG_EXTMS; | |
1410 | ||
1411 | return 1; | |
1412 | } | |
1413 | ||
61138358 MC |
1414 | int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1415 | size_t chainidx, int *al) | |
6dd083fd | 1416 | { |
3cf96e88 | 1417 | #ifndef OPENSSL_NO_TLS1_3 |
6dd083fd MC |
1418 | unsigned int group_id; |
1419 | PACKET encoded_pt; | |
1420 | EVP_PKEY *ckey = s->s3->tmp.pkey, *skey = NULL; | |
1421 | ||
1422 | /* Sanity check */ | |
090c8118 | 1423 | if (ckey == NULL || s->s3->peer_tmp != NULL) { |
6dd083fd | 1424 | *al = SSL_AD_INTERNAL_ERROR; |
7fe97c07 | 1425 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1426 | return 0; |
1427 | } | |
1428 | ||
1429 | if (!PACKET_get_net_2(pkt, &group_id)) { | |
f69fe73a | 1430 | *al = SSL_AD_DECODE_ERROR; |
7fe97c07 | 1431 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_LENGTH_MISMATCH); |
6dd083fd MC |
1432 | return 0; |
1433 | } | |
1434 | ||
fe874d27 | 1435 | if ((context & SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST) != 0) { |
3847d426 MC |
1436 | unsigned const char *pcurves = NULL; |
1437 | size_t i, num_curves; | |
1438 | ||
1439 | if (PACKET_remaining(pkt) != 0) { | |
f69fe73a | 1440 | *al = SSL_AD_DECODE_ERROR; |
3847d426 MC |
1441 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_LENGTH_MISMATCH); |
1442 | return 0; | |
1443 | } | |
1444 | ||
1445 | /* | |
1446 | * It is an error if the HelloRetryRequest wants a key_share that we | |
1447 | * already sent in the first ClientHello | |
1448 | */ | |
1449 | if (group_id == s->s3->group_id) { | |
1450 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
1451 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE); | |
1452 | return 0; | |
1453 | } | |
1454 | ||
1455 | /* Validate the selected group is one we support */ | |
3847d426 MC |
1456 | if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) { |
1457 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); | |
1458 | return 0; | |
1459 | } | |
1460 | for (i = 0; i < num_curves; i++, pcurves += 2) { | |
0dd7ba24 | 1461 | if (group_id == bytestogroup(pcurves)) |
3847d426 MC |
1462 | break; |
1463 | } | |
1464 | if (i >= num_curves | |
1465 | || !tls_curve_allowed(s, pcurves, SSL_SECOP_CURVE_SUPPORTED)) { | |
1466 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
1467 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE); | |
1468 | return 0; | |
1469 | } | |
1470 | ||
1471 | s->s3->group_id = group_id; | |
1472 | EVP_PKEY_free(s->s3->tmp.pkey); | |
1473 | s->s3->tmp.pkey = NULL; | |
1474 | return 1; | |
1475 | } | |
1476 | ||
6dd083fd MC |
1477 | if (group_id != s->s3->group_id) { |
1478 | /* | |
1479 | * This isn't for the group that we sent in the original | |
1480 | * key_share! | |
1481 | */ | |
f69fe73a | 1482 | *al = SSL_AD_ILLEGAL_PARAMETER; |
7fe97c07 | 1483 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE); |
6dd083fd MC |
1484 | return 0; |
1485 | } | |
1486 | ||
1487 | if (!PACKET_as_length_prefixed_2(pkt, &encoded_pt) | |
1488 | || PACKET_remaining(&encoded_pt) == 0) { | |
1489 | *al = SSL_AD_DECODE_ERROR; | |
7fe97c07 | 1490 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_LENGTH_MISMATCH); |
6dd083fd MC |
1491 | return 0; |
1492 | } | |
1493 | ||
1494 | skey = ssl_generate_pkey(ckey); | |
1495 | if (skey == NULL) { | |
1496 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 1497 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_MALLOC_FAILURE); |
6dd083fd MC |
1498 | return 0; |
1499 | } | |
1500 | if (!EVP_PKEY_set1_tls_encodedpoint(skey, PACKET_data(&encoded_pt), | |
1501 | PACKET_remaining(&encoded_pt))) { | |
fb34a0f4 | 1502 | *al = SSL_AD_ILLEGAL_PARAMETER; |
7fe97c07 | 1503 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_ECPOINT); |
a1d6a0b6 | 1504 | EVP_PKEY_free(skey); |
6dd083fd MC |
1505 | return 0; |
1506 | } | |
1507 | ||
1508 | if (ssl_derive(s, ckey, skey, 1) == 0) { | |
1509 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 1510 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1511 | EVP_PKEY_free(skey); |
1512 | return 0; | |
1513 | } | |
090c8118 | 1514 | s->s3->peer_tmp = skey; |
3cf96e88 | 1515 | #endif |
6dd083fd MC |
1516 | |
1517 | return 1; | |
1518 | } | |
4ff65f77 | 1519 | |
cfef5027 MC |
1520 | int tls_parse_stoc_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1521 | size_t chainidx, int *al) | |
1522 | { | |
1523 | PACKET cookie; | |
1524 | ||
1525 | if (!PACKET_as_length_prefixed_2(pkt, &cookie) | |
1526 | || !PACKET_memdup(&cookie, &s->ext.tls13_cookie, | |
1527 | &s->ext.tls13_cookie_len)) { | |
1528 | *al = SSL_AD_DECODE_ERROR; | |
1529 | SSLerr(SSL_F_TLS_PARSE_STOC_COOKIE, SSL_R_LENGTH_MISMATCH); | |
1530 | return 0; | |
1531 | } | |
1532 | ||
1533 | return 1; | |
1534 | } | |
1535 | ||
38df5a45 MC |
1536 | int tls_parse_stoc_early_data(SSL *s, PACKET *pkt, unsigned int context, |
1537 | X509 *x, size_t chainidx, int *al) | |
1538 | { | |
fe874d27 | 1539 | if (context == SSL_EXT_TLS1_3_NEW_SESSION_TICKET) { |
6594189f MC |
1540 | unsigned long max_early_data; |
1541 | ||
1542 | if (!PACKET_get_net_4(pkt, &max_early_data) | |
1543 | || PACKET_remaining(pkt) != 0) { | |
1544 | SSLerr(SSL_F_TLS_PARSE_STOC_EARLY_DATA, | |
1545 | SSL_R_INVALID_MAX_EARLY_DATA); | |
1546 | *al = SSL_AD_DECODE_ERROR; | |
1547 | return 0; | |
1548 | } | |
1549 | ||
1550 | s->session->ext.max_early_data = max_early_data; | |
1551 | ||
1552 | return 1; | |
1553 | } | |
1554 | ||
38df5a45 MC |
1555 | if (PACKET_remaining(pkt) != 0) { |
1556 | *al = SSL_AD_DECODE_ERROR; | |
1557 | return 0; | |
1558 | } | |
1559 | ||
1560 | if (s->ext.early_data != SSL_EARLY_DATA_REJECTED | |
1561 | || !s->hit | |
1562 | || s->session->ext.tick_identity != 0) { | |
1563 | /* | |
1564 | * If we get here then we didn't send early data, or we didn't resume | |
1565 | * using the first identity so the server should not be accepting it. | |
1566 | */ | |
1567 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
1568 | return 0; | |
1569 | } | |
1570 | ||
1571 | s->ext.early_data = SSL_EARLY_DATA_ACCEPTED; | |
1572 | ||
1573 | return 1; | |
1574 | } | |
1575 | ||
61138358 MC |
1576 | int tls_parse_stoc_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1577 | size_t chainidx, int *al) | |
4ff65f77 MC |
1578 | { |
1579 | #ifndef OPENSSL_NO_TLS1_3 | |
1580 | unsigned int identity; | |
1581 | ||
1582 | if (!PACKET_get_net_2(pkt, &identity) || PACKET_remaining(pkt) != 0) { | |
f69fe73a | 1583 | *al = SSL_AD_DECODE_ERROR; |
4ff65f77 MC |
1584 | SSLerr(SSL_F_TLS_PARSE_STOC_PSK, SSL_R_LENGTH_MISMATCH); |
1585 | return 0; | |
1586 | } | |
1587 | ||
9368f865 MC |
1588 | if (s->session->ext.tick_identity == (int)identity) { |
1589 | s->hit = 1; | |
1590 | SSL_SESSION_free(s->psksession); | |
1591 | s->psksession = NULL; | |
1592 | return 1; | |
1593 | } | |
1594 | ||
1595 | if (s->psksession == NULL | |
1596 | || s->psksession->ext.tick_identity != (int)identity) { | |
f69fe73a | 1597 | *al = SSL_AD_ILLEGAL_PARAMETER; |
4ff65f77 MC |
1598 | SSLerr(SSL_F_TLS_PARSE_STOC_PSK, SSL_R_BAD_PSK_IDENTITY); |
1599 | return 0; | |
1600 | } | |
1601 | ||
9368f865 MC |
1602 | SSL_SESSION_free(s->session); |
1603 | s->session = s->psksession; | |
1604 | s->psksession = NULL; | |
1605 | memcpy(s->early_secret, s->session->early_secret, EVP_MAX_MD_SIZE); | |
4ff65f77 MC |
1606 | s->hit = 1; |
1607 | #endif | |
1608 | ||
1609 | return 1; | |
1610 | } |