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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 | 11 | #include "../ssl_locl.h" |
67dc995e | 12 | #include "internal/cryptlib.h" |
6dd083fd MC |
13 | #include "statem_locl.h" |
14 | ||
b186a592 MC |
15 | EXT_RETURN tls_construct_ctos_renegotiate(SSL *s, WPACKET *pkt, |
16 | unsigned int context, X509 *x, | |
17 | size_t chainidx, int *al) | |
ab83e314 MC |
18 | { |
19 | /* Add RI if renegotiating */ | |
20 | if (!s->renegotiate) | |
b186a592 | 21 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
22 | |
23 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_renegotiate) | |
24 | || !WPACKET_start_sub_packet_u16(pkt) | |
25 | || !WPACKET_sub_memcpy_u8(pkt, s->s3->previous_client_finished, | |
26 | s->s3->previous_client_finished_len) | |
27 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 28 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_RENEGOTIATE, ERR_R_INTERNAL_ERROR); |
b186a592 | 29 | return EXT_RETURN_FAIL; |
ab83e314 MC |
30 | } |
31 | ||
b186a592 | 32 | return EXT_RETURN_SENT; |
ab83e314 MC |
33 | } |
34 | ||
b186a592 MC |
35 | EXT_RETURN tls_construct_ctos_server_name(SSL *s, WPACKET *pkt, |
36 | unsigned int context, X509 *x, | |
37 | size_t chainidx, int *al) | |
ab83e314 | 38 | { |
aff8c126 | 39 | if (s->ext.hostname == NULL) |
b186a592 | 40 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
41 | |
42 | /* Add TLS extension servername to the Client Hello message */ | |
43 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_server_name) | |
44 | /* Sub-packet for server_name extension */ | |
45 | || !WPACKET_start_sub_packet_u16(pkt) | |
46 | /* Sub-packet for servername list (always 1 hostname)*/ | |
47 | || !WPACKET_start_sub_packet_u16(pkt) | |
48 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_NAMETYPE_host_name) | |
aff8c126 RS |
49 | || !WPACKET_sub_memcpy_u16(pkt, s->ext.hostname, |
50 | strlen(s->ext.hostname)) | |
ab83e314 MC |
51 | || !WPACKET_close(pkt) |
52 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 53 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SERVER_NAME, ERR_R_INTERNAL_ERROR); |
b186a592 | 54 | return EXT_RETURN_FAIL; |
ab83e314 MC |
55 | } |
56 | ||
b186a592 | 57 | return EXT_RETURN_SENT; |
ab83e314 MC |
58 | } |
59 | ||
60 | #ifndef OPENSSL_NO_SRP | |
b186a592 MC |
61 | EXT_RETURN tls_construct_ctos_srp(SSL *s, WPACKET *pkt, unsigned int context, |
62 | X509 *x, size_t chainidx, int *al) | |
ab83e314 MC |
63 | { |
64 | /* Add SRP username if there is one */ | |
65 | if (s->srp_ctx.login == NULL) | |
b186a592 | 66 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
67 | |
68 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_srp) | |
69 | /* Sub-packet for SRP extension */ | |
70 | || !WPACKET_start_sub_packet_u16(pkt) | |
71 | || !WPACKET_start_sub_packet_u8(pkt) | |
72 | /* login must not be zero...internal error if so */ | |
73 | || !WPACKET_set_flags(pkt, WPACKET_FLAGS_NON_ZERO_LENGTH) | |
74 | || !WPACKET_memcpy(pkt, s->srp_ctx.login, | |
75 | strlen(s->srp_ctx.login)) | |
76 | || !WPACKET_close(pkt) | |
77 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 78 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SRP, ERR_R_INTERNAL_ERROR); |
b186a592 | 79 | return EXT_RETURN_FAIL; |
ab83e314 MC |
80 | } |
81 | ||
b186a592 | 82 | return EXT_RETURN_SENT; |
ab83e314 MC |
83 | } |
84 | #endif | |
85 | ||
86 | #ifndef OPENSSL_NO_EC | |
87 | static int use_ecc(SSL *s) | |
88 | { | |
1266eefd | 89 | int i, end; |
ab83e314 MC |
90 | unsigned long alg_k, alg_a; |
91 | STACK_OF(SSL_CIPHER) *cipher_stack = NULL; | |
92 | ||
93 | /* See if we support any ECC ciphersuites */ | |
94 | if (s->version == SSL3_VERSION) | |
95 | return 0; | |
96 | ||
ab83e314 | 97 | cipher_stack = SSL_get_ciphers(s); |
1266eefd MC |
98 | end = sk_SSL_CIPHER_num(cipher_stack); |
99 | for (i = 0; i < end; i++) { | |
ab83e314 MC |
100 | const SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i); |
101 | ||
102 | alg_k = c->algorithm_mkey; | |
103 | alg_a = c->algorithm_auth; | |
104 | if ((alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) | |
1266eefd MC |
105 | || (alg_a & SSL_aECDSA) |
106 | || c->min_tls >= TLS1_3_VERSION) | |
e0926ef4 | 107 | return 1; |
ab83e314 MC |
108 | } |
109 | ||
e0926ef4 | 110 | return 0; |
ab83e314 MC |
111 | } |
112 | ||
b186a592 MC |
113 | EXT_RETURN tls_construct_ctos_ec_pt_formats(SSL *s, WPACKET *pkt, |
114 | unsigned int context, X509 *x, | |
115 | size_t chainidx, int *al) | |
ab83e314 MC |
116 | { |
117 | const unsigned char *pformats; | |
118 | size_t num_formats; | |
119 | ||
120 | if (!use_ecc(s)) | |
b186a592 | 121 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
122 | |
123 | /* Add TLS extension ECPointFormats to the ClientHello message */ | |
ab83e314 MC |
124 | tls1_get_formatlist(s, &pformats, &num_formats); |
125 | ||
126 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_ec_point_formats) | |
127 | /* Sub-packet for formats extension */ | |
128 | || !WPACKET_start_sub_packet_u16(pkt) | |
129 | || !WPACKET_sub_memcpy_u8(pkt, pformats, num_formats) | |
130 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 131 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR); |
b186a592 | 132 | return EXT_RETURN_FAIL; |
ab83e314 MC |
133 | } |
134 | ||
b186a592 | 135 | return EXT_RETURN_SENT; |
ab83e314 MC |
136 | } |
137 | ||
b186a592 MC |
138 | EXT_RETURN tls_construct_ctos_supported_groups(SSL *s, WPACKET *pkt, |
139 | unsigned int context, X509 *x, | |
140 | size_t chainidx, int *al) | |
ab83e314 MC |
141 | { |
142 | const unsigned char *pcurves = NULL, *pcurvestmp; | |
143 | size_t num_curves = 0, i; | |
144 | ||
145 | if (!use_ecc(s)) | |
b186a592 | 146 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
147 | |
148 | /* | |
149 | * Add TLS extension supported_groups to the ClientHello message | |
150 | */ | |
151 | /* TODO(TLS1.3): Add support for DHE groups */ | |
ab83e314 | 152 | if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) { |
7fe97c07 | 153 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, |
ab83e314 | 154 | ERR_R_INTERNAL_ERROR); |
b186a592 | 155 | return EXT_RETURN_FAIL; |
ab83e314 MC |
156 | } |
157 | pcurvestmp = pcurves; | |
158 | ||
159 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_groups) | |
160 | /* Sub-packet for supported_groups extension */ | |
161 | || !WPACKET_start_sub_packet_u16(pkt) | |
162 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 163 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, |
ab83e314 | 164 | ERR_R_INTERNAL_ERROR); |
b186a592 | 165 | return EXT_RETURN_FAIL; |
ab83e314 MC |
166 | } |
167 | /* Copy curve ID if supported */ | |
168 | for (i = 0; i < num_curves; i++, pcurvestmp += 2) { | |
7d061fce | 169 | if (tls_curve_allowed(s, pcurvestmp, SSL_SECOP_CURVE_SUPPORTED)) { |
ab83e314 MC |
170 | if (!WPACKET_put_bytes_u8(pkt, pcurvestmp[0]) |
171 | || !WPACKET_put_bytes_u8(pkt, pcurvestmp[1])) { | |
7fe97c07 | 172 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, |
ab83e314 | 173 | ERR_R_INTERNAL_ERROR); |
b186a592 | 174 | return EXT_RETURN_FAIL; |
ab83e314 MC |
175 | } |
176 | } | |
177 | } | |
178 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
7fe97c07 | 179 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, |
ab83e314 | 180 | ERR_R_INTERNAL_ERROR); |
b186a592 | 181 | return EXT_RETURN_FAIL; |
ab83e314 MC |
182 | } |
183 | ||
b186a592 | 184 | return EXT_RETURN_SENT; |
ab83e314 MC |
185 | } |
186 | #endif | |
187 | ||
b186a592 MC |
188 | EXT_RETURN tls_construct_ctos_session_ticket(SSL *s, WPACKET *pkt, |
189 | unsigned int context, X509 *x, | |
190 | size_t chainidx, int *al) | |
ab83e314 MC |
191 | { |
192 | size_t ticklen; | |
193 | ||
194 | if (!tls_use_ticket(s)) | |
b186a592 | 195 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
196 | |
197 | if (!s->new_session && s->session != NULL | |
08191294 MC |
198 | && s->session->ext.tick != NULL |
199 | && s->session->ssl_version != TLS1_3_VERSION) { | |
aff8c126 RS |
200 | ticklen = s->session->ext.ticklen; |
201 | } else if (s->session && s->ext.session_ticket != NULL | |
202 | && s->ext.session_ticket->data != NULL) { | |
203 | ticklen = s->ext.session_ticket->length; | |
204 | s->session->ext.tick = OPENSSL_malloc(ticklen); | |
205 | if (s->session->ext.tick == NULL) { | |
7fe97c07 | 206 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET, |
ab83e314 | 207 | ERR_R_INTERNAL_ERROR); |
b186a592 | 208 | return EXT_RETURN_FAIL; |
ab83e314 | 209 | } |
aff8c126 RS |
210 | memcpy(s->session->ext.tick, |
211 | s->ext.session_ticket->data, ticklen); | |
212 | s->session->ext.ticklen = ticklen; | |
ab83e314 MC |
213 | } else { |
214 | ticklen = 0; | |
215 | } | |
216 | ||
aff8c126 RS |
217 | if (ticklen == 0 && s->ext.session_ticket != NULL && |
218 | s->ext.session_ticket->data == NULL) | |
b186a592 | 219 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
220 | |
221 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket) | |
aff8c126 | 222 | || !WPACKET_sub_memcpy_u16(pkt, s->session->ext.tick, ticklen)) { |
7fe97c07 | 223 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET, ERR_R_INTERNAL_ERROR); |
b186a592 | 224 | return EXT_RETURN_FAIL; |
ab83e314 MC |
225 | } |
226 | ||
b186a592 | 227 | return EXT_RETURN_SENT; |
ab83e314 MC |
228 | } |
229 | ||
b186a592 MC |
230 | EXT_RETURN tls_construct_ctos_sig_algs(SSL *s, WPACKET *pkt, |
231 | unsigned int context, X509 *x, | |
232 | size_t chainidx, int *al) | |
ab83e314 MC |
233 | { |
234 | size_t salglen; | |
98c792d1 | 235 | const uint16_t *salg; |
ab83e314 MC |
236 | |
237 | if (!SSL_CLIENT_USE_SIGALGS(s)) | |
b186a592 | 238 | return EXT_RETURN_NOT_SENT; |
ab83e314 | 239 | |
a9669ddc | 240 | salglen = tls12_get_psigalgs(s, 1, &salg); |
ab83e314 MC |
241 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signature_algorithms) |
242 | /* Sub-packet for sig-algs extension */ | |
243 | || !WPACKET_start_sub_packet_u16(pkt) | |
244 | /* Sub-packet for the actual list */ | |
245 | || !WPACKET_start_sub_packet_u16(pkt) | |
246 | || !tls12_copy_sigalgs(s, pkt, salg, salglen) | |
247 | || !WPACKET_close(pkt) | |
248 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 249 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SIG_ALGS, ERR_R_INTERNAL_ERROR); |
b186a592 | 250 | return EXT_RETURN_FAIL; |
ab83e314 MC |
251 | } |
252 | ||
b186a592 | 253 | return EXT_RETURN_SENT; |
ab83e314 MC |
254 | } |
255 | ||
256 | #ifndef OPENSSL_NO_OCSP | |
b186a592 MC |
257 | EXT_RETURN tls_construct_ctos_status_request(SSL *s, WPACKET *pkt, |
258 | unsigned int context, X509 *x, | |
259 | size_t chainidx, int *al) | |
ab83e314 MC |
260 | { |
261 | int i; | |
262 | ||
e96e0f8e MC |
263 | /* This extension isn't defined for client Certificates */ |
264 | if (x != NULL) | |
b186a592 | 265 | return EXT_RETURN_NOT_SENT; |
e96e0f8e | 266 | |
aff8c126 | 267 | if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) |
b186a592 | 268 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
269 | |
270 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request) | |
271 | /* Sub-packet for status request extension */ | |
272 | || !WPACKET_start_sub_packet_u16(pkt) | |
273 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_STATUSTYPE_ocsp) | |
274 | /* Sub-packet for the ids */ | |
275 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 276 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); |
b186a592 | 277 | return EXT_RETURN_FAIL; |
ab83e314 | 278 | } |
aff8c126 | 279 | for (i = 0; i < sk_OCSP_RESPID_num(s->ext.ocsp.ids); i++) { |
ab83e314 | 280 | unsigned char *idbytes; |
aff8c126 | 281 | OCSP_RESPID *id = sk_OCSP_RESPID_value(s->ext.ocsp.ids, i); |
1266eefd | 282 | int idlen = i2d_OCSP_RESPID(id, NULL); |
ab83e314 | 283 | |
ab83e314 MC |
284 | if (idlen <= 0 |
285 | /* Sub-packet for an individual id */ | |
286 | || !WPACKET_sub_allocate_bytes_u16(pkt, idlen, &idbytes) | |
287 | || i2d_OCSP_RESPID(id, &idbytes) != idlen) { | |
7fe97c07 | 288 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, |
ab83e314 | 289 | ERR_R_INTERNAL_ERROR); |
b186a592 | 290 | return EXT_RETURN_FAIL; |
ab83e314 MC |
291 | } |
292 | } | |
293 | if (!WPACKET_close(pkt) | |
294 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 295 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); |
b186a592 | 296 | return EXT_RETURN_FAIL; |
ab83e314 | 297 | } |
aff8c126 | 298 | if (s->ext.ocsp.exts) { |
ab83e314 | 299 | unsigned char *extbytes; |
aff8c126 | 300 | int extlen = i2d_X509_EXTENSIONS(s->ext.ocsp.exts, NULL); |
ab83e314 MC |
301 | |
302 | if (extlen < 0) { | |
7fe97c07 | 303 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, |
ab83e314 | 304 | ERR_R_INTERNAL_ERROR); |
b186a592 | 305 | return EXT_RETURN_FAIL; |
ab83e314 MC |
306 | } |
307 | if (!WPACKET_allocate_bytes(pkt, extlen, &extbytes) | |
aff8c126 | 308 | || i2d_X509_EXTENSIONS(s->ext.ocsp.exts, &extbytes) |
ab83e314 | 309 | != extlen) { |
7fe97c07 | 310 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, |
ab83e314 | 311 | ERR_R_INTERNAL_ERROR); |
b186a592 | 312 | return EXT_RETURN_FAIL; |
ab83e314 MC |
313 | } |
314 | } | |
315 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
7fe97c07 | 316 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); |
b186a592 | 317 | return EXT_RETURN_FAIL; |
ab83e314 MC |
318 | } |
319 | ||
b186a592 | 320 | return EXT_RETURN_SENT; |
ab83e314 MC |
321 | } |
322 | #endif | |
323 | ||
324 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
b186a592 MC |
325 | EXT_RETURN tls_construct_ctos_npn(SSL *s, WPACKET *pkt, unsigned int context, |
326 | X509 *x, size_t chainidx, int *al) | |
ab83e314 | 327 | { |
c7f47786 | 328 | if (s->ctx->ext.npn_select_cb == NULL || !SSL_IS_FIRST_HANDSHAKE(s)) |
b186a592 | 329 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
330 | |
331 | /* | |
332 | * The client advertises an empty extension to indicate its support | |
333 | * for Next Protocol Negotiation | |
334 | */ | |
335 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_next_proto_neg) | |
336 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 337 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_NPN, ERR_R_INTERNAL_ERROR); |
b186a592 | 338 | return EXT_RETURN_FAIL; |
ab83e314 MC |
339 | } |
340 | ||
b186a592 | 341 | return EXT_RETURN_SENT; |
ab83e314 MC |
342 | } |
343 | #endif | |
344 | ||
b186a592 MC |
345 | EXT_RETURN tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, unsigned int context, |
346 | X509 *x, size_t chainidx, int *al) | |
ab83e314 MC |
347 | { |
348 | s->s3->alpn_sent = 0; | |
349 | ||
c7f47786 | 350 | if (s->ext.alpn == NULL || !SSL_IS_FIRST_HANDSHAKE(s)) |
b186a592 | 351 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
352 | |
353 | if (!WPACKET_put_bytes_u16(pkt, | |
354 | TLSEXT_TYPE_application_layer_protocol_negotiation) | |
355 | /* Sub-packet ALPN extension */ | |
356 | || !WPACKET_start_sub_packet_u16(pkt) | |
aff8c126 | 357 | || !WPACKET_sub_memcpy_u16(pkt, s->ext.alpn, s->ext.alpn_len) |
ab83e314 | 358 | || !WPACKET_close(pkt)) { |
7fe97c07 | 359 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ALPN, ERR_R_INTERNAL_ERROR); |
b186a592 | 360 | return EXT_RETURN_FAIL; |
ab83e314 MC |
361 | } |
362 | s->s3->alpn_sent = 1; | |
363 | ||
b186a592 | 364 | return EXT_RETURN_SENT; |
ab83e314 MC |
365 | } |
366 | ||
367 | ||
368 | #ifndef OPENSSL_NO_SRTP | |
b186a592 MC |
369 | EXT_RETURN tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt, |
370 | unsigned int context, X509 *x, | |
371 | size_t chainidx, int *al) | |
ab83e314 MC |
372 | { |
373 | STACK_OF(SRTP_PROTECTION_PROFILE) *clnt = SSL_get_srtp_profiles(s); | |
1266eefd | 374 | int i, end; |
ab83e314 MC |
375 | |
376 | if (clnt == NULL) | |
b186a592 | 377 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
378 | |
379 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp) | |
380 | /* Sub-packet for SRTP extension */ | |
381 | || !WPACKET_start_sub_packet_u16(pkt) | |
382 | /* Sub-packet for the protection profile list */ | |
383 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
7fe97c07 | 384 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR); |
b186a592 | 385 | return EXT_RETURN_FAIL; |
ab83e314 | 386 | } |
1266eefd MC |
387 | |
388 | end = sk_SRTP_PROTECTION_PROFILE_num(clnt); | |
389 | for (i = 0; i < end; i++) { | |
390 | const SRTP_PROTECTION_PROFILE *prof = | |
391 | sk_SRTP_PROTECTION_PROFILE_value(clnt, i); | |
392 | ||
ab83e314 | 393 | if (prof == NULL || !WPACKET_put_bytes_u16(pkt, prof->id)) { |
7fe97c07 | 394 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR); |
b186a592 | 395 | return EXT_RETURN_FAIL; |
ab83e314 MC |
396 | } |
397 | } | |
398 | if (!WPACKET_close(pkt) | |
399 | /* Add an empty use_mki value */ | |
400 | || !WPACKET_put_bytes_u8(pkt, 0) | |
401 | || !WPACKET_close(pkt)) { | |
7fe97c07 | 402 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR); |
b186a592 | 403 | return EXT_RETURN_FAIL; |
ab83e314 MC |
404 | } |
405 | ||
b186a592 | 406 | return EXT_RETURN_SENT; |
ab83e314 MC |
407 | } |
408 | #endif | |
409 | ||
b186a592 MC |
410 | EXT_RETURN tls_construct_ctos_etm(SSL *s, WPACKET *pkt, unsigned int context, |
411 | X509 *x, size_t chainidx, int *al) | |
ab83e314 MC |
412 | { |
413 | if (s->options & SSL_OP_NO_ENCRYPT_THEN_MAC) | |
b186a592 | 414 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
415 | |
416 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac) | |
417 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 418 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ETM, ERR_R_INTERNAL_ERROR); |
b186a592 | 419 | return EXT_RETURN_FAIL; |
ab83e314 MC |
420 | } |
421 | ||
b186a592 | 422 | return EXT_RETURN_SENT; |
ab83e314 MC |
423 | } |
424 | ||
425 | #ifndef OPENSSL_NO_CT | |
b186a592 MC |
426 | EXT_RETURN tls_construct_ctos_sct(SSL *s, WPACKET *pkt, unsigned int context, |
427 | X509 *x, size_t chainidx, int *al) | |
ab83e314 MC |
428 | { |
429 | if (s->ct_validation_callback == NULL) | |
b186a592 | 430 | return EXT_RETURN_NOT_SENT; |
ab83e314 | 431 | |
e96e0f8e MC |
432 | /* Not defined for client Certificates */ |
433 | if (x != NULL) | |
b186a592 | 434 | return EXT_RETURN_NOT_SENT; |
e96e0f8e | 435 | |
ab83e314 MC |
436 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signed_certificate_timestamp) |
437 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 438 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SCT, ERR_R_INTERNAL_ERROR); |
b186a592 | 439 | return EXT_RETURN_FAIL; |
ab83e314 MC |
440 | } |
441 | ||
b186a592 | 442 | return EXT_RETURN_SENT; |
ab83e314 MC |
443 | } |
444 | #endif | |
445 | ||
b186a592 MC |
446 | EXT_RETURN tls_construct_ctos_ems(SSL *s, WPACKET *pkt, unsigned int context, |
447 | X509 *x, size_t chainidx, int *al) | |
ab83e314 MC |
448 | { |
449 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret) | |
450 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
7fe97c07 | 451 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EMS, ERR_R_INTERNAL_ERROR); |
b186a592 | 452 | return EXT_RETURN_FAIL; |
ab83e314 MC |
453 | } |
454 | ||
b186a592 | 455 | return EXT_RETURN_SENT; |
ab83e314 MC |
456 | } |
457 | ||
b186a592 MC |
458 | EXT_RETURN tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt, |
459 | unsigned int context, X509 *x, | |
460 | size_t chainidx, int *al) | |
ab83e314 MC |
461 | { |
462 | int currv, min_version, max_version, reason; | |
463 | ||
464 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_versions) | |
465 | || !WPACKET_start_sub_packet_u16(pkt) | |
466 | || !WPACKET_start_sub_packet_u8(pkt)) { | |
7fe97c07 | 467 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, |
ab83e314 | 468 | ERR_R_INTERNAL_ERROR); |
b186a592 | 469 | return EXT_RETURN_FAIL; |
ab83e314 MC |
470 | } |
471 | ||
38a73150 | 472 | reason = ssl_get_min_max_version(s, &min_version, &max_version); |
ab83e314 | 473 | if (reason != 0) { |
7fe97c07 | 474 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, reason); |
b186a592 | 475 | return EXT_RETURN_FAIL; |
ab83e314 MC |
476 | } |
477 | ||
478 | /* | |
1ee4b98e | 479 | * TODO(TLS1.3): There is some discussion on the TLS list as to whether |
ab83e314 MC |
480 | * we should include versions <TLS1.2. For the moment we do. To be |
481 | * reviewed later. | |
482 | */ | |
483 | for (currv = max_version; currv >= min_version; currv--) { | |
484 | /* TODO(TLS1.3): Remove this first if clause prior to release!! */ | |
485 | if (currv == TLS1_3_VERSION) { | |
486 | if (!WPACKET_put_bytes_u16(pkt, TLS1_3_VERSION_DRAFT)) { | |
7fe97c07 | 487 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, |
ab83e314 | 488 | ERR_R_INTERNAL_ERROR); |
b186a592 | 489 | return EXT_RETURN_FAIL; |
ab83e314 MC |
490 | } |
491 | } else if (!WPACKET_put_bytes_u16(pkt, currv)) { | |
7fe97c07 | 492 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, |
ab83e314 | 493 | ERR_R_INTERNAL_ERROR); |
b186a592 | 494 | return EXT_RETURN_FAIL; |
ab83e314 MC |
495 | } |
496 | } | |
497 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
7fe97c07 | 498 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, |
ab83e314 | 499 | ERR_R_INTERNAL_ERROR); |
b186a592 | 500 | return EXT_RETURN_FAIL; |
ab83e314 MC |
501 | } |
502 | ||
b186a592 | 503 | return EXT_RETURN_SENT; |
ab83e314 MC |
504 | } |
505 | ||
b2f7e8c0 | 506 | /* |
e3c0d76b | 507 | * Construct a psk_kex_modes extension. |
b2f7e8c0 | 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 | |
e3c0d76b MC |
514 | int nodhe = s->options & SSL_OP_ALLOW_NO_DHE_KEX; |
515 | ||
b2f7e8c0 MC |
516 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk_kex_modes) |
517 | || !WPACKET_start_sub_packet_u16(pkt) | |
518 | || !WPACKET_start_sub_packet_u8(pkt) | |
519 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE_DHE) | |
e3c0d76b | 520 | || (nodhe && !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE)) |
b2f7e8c0 MC |
521 | || !WPACKET_close(pkt) |
522 | || !WPACKET_close(pkt)) { | |
523 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK_KEX_MODES, ERR_R_INTERNAL_ERROR); | |
b186a592 | 524 | return EXT_RETURN_FAIL; |
b2f7e8c0 | 525 | } |
b3ad72ce | 526 | |
e3c0d76b MC |
527 | s->ext.psk_kex_mode = TLSEXT_KEX_MODE_FLAG_KE_DHE; |
528 | if (nodhe) | |
529 | s->ext.psk_kex_mode |= TLSEXT_KEX_MODE_FLAG_KE; | |
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 | 681 | { |
add8d0e9 | 682 | const unsigned char *id; |
fff202e5 | 683 | size_t idlen = 0; |
add8d0e9 | 684 | SSL_SESSION *psksess = NULL; |
ffc5bbaa | 685 | SSL_SESSION *edsess = NULL; |
add8d0e9 MC |
686 | const EVP_MD *handmd = NULL; |
687 | ||
688 | if (s->hello_retry_request) | |
689 | handmd = ssl_handshake_md(s); | |
690 | ||
691 | if (s->psk_use_session_cb != NULL | |
ffc5bbaa MC |
692 | && (!s->psk_use_session_cb(s, handmd, &id, &idlen, &psksess) |
693 | || (psksess != NULL | |
694 | && psksess->ssl_version != TLS1_3_VERSION))) { | |
695 | SSL_SESSION_free(psksess); | |
add8d0e9 MC |
696 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, SSL_R_BAD_PSK); |
697 | return EXT_RETURN_FAIL; | |
698 | } | |
699 | ||
700 | SSL_SESSION_free(s->psksession); | |
701 | s->psksession = psksess; | |
702 | if (psksess != NULL) { | |
703 | OPENSSL_free(s->psksession_id); | |
704 | s->psksession_id = OPENSSL_memdup(id, idlen); | |
705 | if (s->psksession_id == NULL) { | |
706 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, ERR_R_INTERNAL_ERROR); | |
707 | return EXT_RETURN_FAIL; | |
708 | } | |
709 | s->psksession_id_len = idlen; | |
710 | } | |
711 | ||
38df5a45 | 712 | if (s->early_data_state != SSL_EARLY_DATA_CONNECTING |
add8d0e9 MC |
713 | || (s->session->ext.max_early_data == 0 |
714 | && (psksess == NULL || psksess->ext.max_early_data == 0))) { | |
38df5a45 | 715 | s->max_early_data = 0; |
b186a592 | 716 | return EXT_RETURN_NOT_SENT; |
38df5a45 | 717 | } |
ffc5bbaa MC |
718 | edsess = s->session->ext.max_early_data != 0 ? s->session : psksess; |
719 | s->max_early_data = edsess->ext.max_early_data; | |
720 | ||
721 | if ((s->ext.hostname == NULL && edsess->ext.hostname != NULL) | |
722 | || (s->ext.hostname != NULL | |
723 | && (edsess->ext.hostname == NULL | |
724 | || strcmp(s->ext.hostname, edsess->ext.hostname) != 0))) { | |
725 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, | |
726 | SSL_R_INCONSISTENT_EARLY_DATA_SNI); | |
727 | return EXT_RETURN_FAIL; | |
728 | } | |
729 | ||
730 | if ((s->ext.alpn == NULL && edsess->ext.alpn_selected != NULL)) { | |
731 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, | |
732 | SSL_R_INCONSISTENT_EARLY_DATA_ALPN); | |
733 | return EXT_RETURN_FAIL; | |
734 | } | |
735 | ||
736 | /* | |
737 | * Verify that we are offering an ALPN protocol consistent with the early | |
738 | * data. | |
739 | */ | |
740 | if (edsess->ext.alpn_selected != NULL) { | |
741 | PACKET prots, alpnpkt; | |
742 | int found = 0; | |
743 | ||
744 | if (!PACKET_buf_init(&prots, s->ext.alpn, s->ext.alpn_len)) { | |
745 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, ERR_R_INTERNAL_ERROR); | |
746 | return EXT_RETURN_FAIL; | |
747 | } | |
748 | while (PACKET_get_length_prefixed_1(&prots, &alpnpkt)) { | |
749 | if (PACKET_equal(&alpnpkt, edsess->ext.alpn_selected, | |
750 | edsess->ext.alpn_selected_len)) { | |
751 | found = 1; | |
752 | break; | |
753 | } | |
754 | } | |
755 | if (!found) { | |
756 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, | |
757 | SSL_R_INCONSISTENT_EARLY_DATA_ALPN); | |
758 | return EXT_RETURN_FAIL; | |
759 | } | |
760 | } | |
38df5a45 MC |
761 | |
762 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) | |
763 | || !WPACKET_start_sub_packet_u16(pkt) | |
764 | || !WPACKET_close(pkt)) { | |
765 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, ERR_R_INTERNAL_ERROR); | |
b186a592 | 766 | return EXT_RETURN_FAIL; |
38df5a45 MC |
767 | } |
768 | ||
769 | /* | |
770 | * We set this to rejected here. Later, if the server acknowledges the | |
771 | * extension, we set it to accepted. | |
772 | */ | |
773 | s->ext.early_data = SSL_EARLY_DATA_REJECTED; | |
4be3a7c7 | 774 | s->ext.early_data_ok = 1; |
38df5a45 | 775 | |
b186a592 | 776 | return EXT_RETURN_SENT; |
38df5a45 MC |
777 | } |
778 | ||
1266eefd MC |
779 | #define F5_WORKAROUND_MIN_MSG_LEN 0xff |
780 | #define F5_WORKAROUND_MAX_MSG_LEN 0x200 | |
781 | ||
d702ad12 MC |
782 | /* |
783 | * PSK pre binder overhead = | |
784 | * 2 bytes for TLSEXT_TYPE_psk | |
785 | * 2 bytes for extension length | |
786 | * 2 bytes for identities list length | |
787 | * 2 bytes for identity length | |
788 | * 4 bytes for obfuscated_ticket_age | |
789 | * 2 bytes for binder list length | |
790 | * 1 byte for binder length | |
791 | * The above excludes the number of bytes for the identity itself and the | |
792 | * subsequent binder bytes | |
793 | */ | |
794 | #define PSK_PRE_BINDER_OVERHEAD (2 + 2 + 2 + 2 + 4 + 2 + 1) | |
795 | ||
b186a592 MC |
796 | EXT_RETURN tls_construct_ctos_padding(SSL *s, WPACKET *pkt, |
797 | unsigned int context, X509 *x, | |
798 | size_t chainidx, int *al) | |
ab83e314 MC |
799 | { |
800 | unsigned char *padbytes; | |
801 | size_t hlen; | |
802 | ||
803 | if ((s->options & SSL_OP_TLSEXT_PADDING) == 0) | |
b186a592 | 804 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
805 | |
806 | /* | |
d702ad12 MC |
807 | * Add padding to workaround bugs in F5 terminators. See RFC7685. |
808 | * This code calculates the length of all extensions added so far but | |
809 | * excludes the PSK extension (because that MUST be written last). Therefore | |
810 | * this extension MUST always appear second to last. | |
ab83e314 MC |
811 | */ |
812 | if (!WPACKET_get_total_written(pkt, &hlen)) { | |
7fe97c07 | 813 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING, ERR_R_INTERNAL_ERROR); |
b186a592 | 814 | return EXT_RETURN_FAIL; |
ab83e314 MC |
815 | } |
816 | ||
d702ad12 MC |
817 | /* |
818 | * If we're going to send a PSK then that will be written out after this | |
819 | * extension, so we need to calculate how long it is going to be. | |
820 | */ | |
821 | if (s->session->ssl_version == TLS1_3_VERSION | |
822 | && s->session->ext.ticklen != 0 | |
823 | && s->session->cipher != NULL) { | |
824 | const EVP_MD *md = ssl_md(s->session->cipher->algorithm2); | |
825 | ||
826 | if (md != NULL) { | |
827 | /* | |
828 | * Add the fixed PSK overhead, the identity length and the binder | |
829 | * length. | |
830 | */ | |
831 | hlen += PSK_PRE_BINDER_OVERHEAD + s->session->ext.ticklen | |
832 | + EVP_MD_size(md); | |
833 | } | |
834 | } | |
835 | ||
1266eefd | 836 | if (hlen > F5_WORKAROUND_MIN_MSG_LEN && hlen < F5_WORKAROUND_MAX_MSG_LEN) { |
1ee4b98e | 837 | /* Calculate the amount of padding we need to add */ |
1266eefd MC |
838 | hlen = F5_WORKAROUND_MAX_MSG_LEN - hlen; |
839 | ||
840 | /* | |
841 | * Take off the size of extension header itself (2 bytes for type and | |
10ed1b72 TS |
842 | * 2 bytes for length bytes), but ensure that the extension is at least |
843 | * 1 byte long so as not to have an empty extension last (WebSphere 7.x, | |
844 | * 8.x are intolerant of that condition) | |
1266eefd | 845 | */ |
ab83e314 MC |
846 | if (hlen >= 4) |
847 | hlen -= 4; | |
848 | else | |
10ed1b72 | 849 | hlen = 1; |
ab83e314 MC |
850 | |
851 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_padding) | |
852 | || !WPACKET_sub_allocate_bytes_u16(pkt, hlen, &padbytes)) { | |
7fe97c07 | 853 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING, ERR_R_INTERNAL_ERROR); |
ab83e314 MC |
854 | return 0; |
855 | } | |
856 | memset(padbytes, 0, hlen); | |
857 | } | |
858 | ||
b186a592 | 859 | return EXT_RETURN_SENT; |
ab83e314 MC |
860 | } |
861 | ||
ec15acb6 MC |
862 | /* |
863 | * Construct the pre_shared_key extension | |
864 | */ | |
b186a592 MC |
865 | EXT_RETURN tls_construct_ctos_psk(SSL *s, WPACKET *pkt, unsigned int context, |
866 | X509 *x, size_t chainidx, int *al) | |
ec15acb6 MC |
867 | { |
868 | #ifndef OPENSSL_NO_TLS1_3 | |
15b1688a | 869 | uint32_t now, agesec, agems = 0; |
add8d0e9 | 870 | size_t reshashsize = 0, pskhashsize = 0, binderoffset, msglen; |
9368f865 | 871 | unsigned char *resbinder = NULL, *pskbinder = NULL, *msgstart = NULL; |
15b1688a | 872 | const EVP_MD *handmd = NULL, *mdres = NULL, *mdpsk = NULL; |
b186a592 | 873 | EXT_RETURN ret = EXT_RETURN_FAIL; |
9368f865 | 874 | int dores = 0; |
ec15acb6 MC |
875 | |
876 | s->session->ext.tick_identity = TLSEXT_PSK_BAD_IDENTITY; | |
877 | ||
d702ad12 MC |
878 | /* |
879 | * Note: At this stage of the code we only support adding a single | |
880 | * resumption PSK. If we add support for multiple PSKs then the length | |
881 | * calculations in the padding extension will need to be adjusted. | |
882 | */ | |
883 | ||
ec15acb6 | 884 | /* |
08191294 MC |
885 | * If this is an incompatible or new session then we have nothing to resume |
886 | * so don't add this extension. | |
ec15acb6 | 887 | */ |
08191294 | 888 | if (s->session->ssl_version != TLS1_3_VERSION |
add8d0e9 | 889 | || (s->session->ext.ticklen == 0 && s->psksession == NULL)) |
b186a592 | 890 | return EXT_RETURN_NOT_SENT; |
ec15acb6 | 891 | |
9368f865 MC |
892 | if (s->hello_retry_request) |
893 | handmd = ssl_handshake_md(s); | |
894 | ||
9368f865 | 895 | if (s->session->ext.ticklen != 0) { |
72257204 | 896 | /* Get the digest associated with the ciphersuite in the session */ |
9368f865 MC |
897 | if (s->session->cipher == NULL) { |
898 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR); | |
899 | goto err; | |
900 | } | |
9368f865 MC |
901 | mdres = ssl_md(s->session->cipher->algorithm2); |
902 | if (mdres == NULL) { | |
72257204 MC |
903 | /* |
904 | * Don't recognize this cipher so we can't use the session. | |
905 | * Ignore it | |
906 | */ | |
9368f865 MC |
907 | goto dopsksess; |
908 | } | |
909 | ||
910 | if (s->hello_retry_request && mdres != handmd) { | |
911 | /* | |
72257204 MC |
912 | * Selected ciphersuite hash does not match the hash for the session |
913 | * so we can't use it. | |
9368f865 MC |
914 | */ |
915 | goto dopsksess; | |
916 | } | |
1f5b44e9 | 917 | |
cf3e221b | 918 | /* |
9368f865 | 919 | * Technically the C standard just says time() returns a time_t and says |
72257204 MC |
920 | * nothing about the encoding of that type. In practice most |
921 | * implementations follow POSIX which holds it as an integral type in | |
922 | * seconds since epoch. We've already made the assumption that we can do | |
923 | * this in multiple places in the code, so portability shouldn't be an | |
924 | * issue. | |
cf3e221b | 925 | */ |
9368f865 MC |
926 | now = (uint32_t)time(NULL); |
927 | agesec = now - (uint32_t)s->session->time; | |
cf3e221b | 928 | |
9368f865 MC |
929 | if (s->session->ext.tick_lifetime_hint < agesec) { |
930 | /* Ticket is too old. Ignore it. */ | |
931 | goto dopsksess; | |
932 | } | |
ec15acb6 | 933 | |
9368f865 MC |
934 | /* |
935 | * Calculate age in ms. We're just doing it to nearest second. Should be | |
936 | * good enough. | |
937 | */ | |
938 | agems = agesec * (uint32_t)1000; | |
fc24f0bf | 939 | |
9368f865 MC |
940 | if (agesec != 0 && agems / (uint32_t)1000 != agesec) { |
941 | /* | |
72257204 MC |
942 | * Overflow. Shouldn't happen unless this is a *really* old session. |
943 | * If so we just ignore it. | |
9368f865 MC |
944 | */ |
945 | goto dopsksess; | |
946 | } | |
ec15acb6 | 947 | |
ec15acb6 | 948 | /* |
72257204 MC |
949 | * Obfuscate the age. Overflow here is fine, this addition is supposed |
950 | * to be mod 2^32. | |
ec15acb6 | 951 | */ |
9368f865 MC |
952 | agems += s->session->ext.tick_age_add; |
953 | ||
954 | reshashsize = EVP_MD_size(mdres); | |
955 | dores = 1; | |
ec15acb6 MC |
956 | } |
957 | ||
9368f865 | 958 | dopsksess: |
add8d0e9 | 959 | if (!dores && s->psksession == NULL) |
9368f865 | 960 | return EXT_RETURN_NOT_SENT; |
ec15acb6 | 961 | |
add8d0e9 MC |
962 | if (s->psksession != NULL) { |
963 | mdpsk = ssl_md(s->psksession->cipher->algorithm2); | |
9368f865 MC |
964 | if (mdpsk == NULL) { |
965 | /* | |
966 | * Don't recognize this cipher so we can't use the session. | |
967 | * If this happens it's an application bug. | |
968 | */ | |
969 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, SSL_R_BAD_PSK); | |
970 | goto err; | |
971 | } | |
972 | ||
011d768a | 973 | if (s->hello_retry_request && mdpsk != handmd) { |
9368f865 MC |
974 | /* |
975 | * Selected ciphersuite hash does not match the hash for the PSK | |
976 | * session. This is an application bug. | |
977 | */ | |
978 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, SSL_R_BAD_PSK); | |
979 | goto err; | |
980 | } | |
981 | ||
982 | pskhashsize = EVP_MD_size(mdpsk); | |
983 | } | |
ec15acb6 MC |
984 | |
985 | /* Create the extension, but skip over the binder for now */ | |
986 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk) | |
987 | || !WPACKET_start_sub_packet_u16(pkt) | |
9368f865 MC |
988 | || !WPACKET_start_sub_packet_u16(pkt)) { |
989 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR); | |
990 | goto err; | |
991 | } | |
992 | ||
993 | if (dores) { | |
994 | if (!WPACKET_sub_memcpy_u16(pkt, s->session->ext.tick, | |
995 | s->session->ext.ticklen) | |
996 | || !WPACKET_put_bytes_u32(pkt, agems)) { | |
997 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR); | |
998 | goto err; | |
999 | } | |
1000 | } | |
1001 | ||
add8d0e9 MC |
1002 | if (s->psksession != NULL) { |
1003 | if (!WPACKET_sub_memcpy_u16(pkt, s->psksession_id, | |
1004 | s->psksession_id_len) | |
9368f865 MC |
1005 | || !WPACKET_put_bytes_u32(pkt, 0)) { |
1006 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR); | |
1007 | goto err; | |
1008 | } | |
1009 | } | |
1010 | ||
1011 | if (!WPACKET_close(pkt) | |
ec15acb6 MC |
1012 | || !WPACKET_get_total_written(pkt, &binderoffset) |
1013 | || !WPACKET_start_sub_packet_u16(pkt) | |
9368f865 MC |
1014 | || (dores |
1015 | && !WPACKET_sub_allocate_bytes_u8(pkt, reshashsize, &resbinder)) | |
add8d0e9 | 1016 | || (s->psksession != NULL |
9368f865 | 1017 | && !WPACKET_sub_allocate_bytes_u8(pkt, pskhashsize, &pskbinder)) |
ec15acb6 MC |
1018 | || !WPACKET_close(pkt) |
1019 | || !WPACKET_close(pkt) | |
1020 | || !WPACKET_get_total_written(pkt, &msglen) | |
1021 | /* | |
1022 | * We need to fill in all the sub-packet lengths now so we can | |
1023 | * calculate the HMAC of the message up to the binders | |
1024 | */ | |
1025 | || !WPACKET_fill_lengths(pkt)) { | |
1026 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR); | |
1027 | goto err; | |
1028 | } | |
1029 | ||
1030 | msgstart = WPACKET_get_curr(pkt) - msglen; | |
1031 | ||
72257204 MC |
1032 | if (dores |
1033 | && tls_psk_do_binder(s, mdres, msgstart, binderoffset, NULL, | |
1034 | resbinder, s->session, 1, 0) != 1) { | |
ec15acb6 MC |
1035 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR); |
1036 | goto err; | |
1037 | } | |
1038 | ||
add8d0e9 | 1039 | if (s->psksession != NULL |
72257204 | 1040 | && tls_psk_do_binder(s, mdpsk, msgstart, binderoffset, NULL, |
add8d0e9 | 1041 | pskbinder, s->psksession, 1, 1) != 1) { |
9368f865 MC |
1042 | SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR); |
1043 | goto err; | |
1044 | } | |
1045 | ||
1046 | if (dores) | |
1047 | s->session->ext.tick_identity = 0; | |
add8d0e9 | 1048 | if (s->psksession != NULL) |
9368f865 | 1049 | s->psksession->ext.tick_identity = (dores ? 1 : 0); |
ec15acb6 | 1050 | |
b186a592 | 1051 | ret = EXT_RETURN_SENT; |
ec15acb6 | 1052 | err: |
ec15acb6 MC |
1053 | return ret; |
1054 | #else | |
1055 | return 1; | |
1056 | #endif | |
1057 | } | |
1058 | ||
6dd083fd MC |
1059 | /* |
1060 | * Parse the server's renegotiation binding and abort if it's not right | |
1061 | */ | |
61138358 MC |
1062 | int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, unsigned int context, |
1063 | X509 *x, size_t chainidx, int *al) | |
6dd083fd MC |
1064 | { |
1065 | size_t expected_len = s->s3->previous_client_finished_len | |
1066 | + s->s3->previous_server_finished_len; | |
1067 | size_t ilen; | |
1068 | const unsigned char *data; | |
1069 | ||
1070 | /* Check for logic errors */ | |
b77f3ed1 MC |
1071 | if (!ossl_assert(expected_len == 0 |
1072 | || s->s3->previous_client_finished_len != 0) | |
1073 | || !ossl_assert(expected_len == 0 | |
1074 | || s->s3->previous_server_finished_len != 0)) { | |
1075 | *al = SSL_AD_INTERNAL_ERROR; | |
1076 | return 0; | |
1077 | } | |
6dd083fd MC |
1078 | |
1079 | /* Parse the length byte */ | |
1080 | if (!PACKET_get_1_len(pkt, &ilen)) { | |
7fe97c07 | 1081 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd | 1082 | SSL_R_RENEGOTIATION_ENCODING_ERR); |
fb34a0f4 | 1083 | *al = SSL_AD_DECODE_ERROR; |
6dd083fd MC |
1084 | return 0; |
1085 | } | |
1086 | ||
1087 | /* Consistency check */ | |
1088 | if (PACKET_remaining(pkt) != ilen) { | |
7fe97c07 | 1089 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd | 1090 | SSL_R_RENEGOTIATION_ENCODING_ERR); |
fb34a0f4 | 1091 | *al = SSL_AD_DECODE_ERROR; |
6dd083fd MC |
1092 | return 0; |
1093 | } | |
1094 | ||
1095 | /* Check that the extension matches */ | |
1096 | if (ilen != expected_len) { | |
7fe97c07 | 1097 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd | 1098 | SSL_R_RENEGOTIATION_MISMATCH); |
fb34a0f4 | 1099 | *al = SSL_AD_ILLEGAL_PARAMETER; |
6dd083fd MC |
1100 | return 0; |
1101 | } | |
1102 | ||
1103 | if (!PACKET_get_bytes(pkt, &data, s->s3->previous_client_finished_len) | |
1104 | || memcmp(data, s->s3->previous_client_finished, | |
1105 | s->s3->previous_client_finished_len) != 0) { | |
7fe97c07 | 1106 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd | 1107 | SSL_R_RENEGOTIATION_MISMATCH); |
fb34a0f4 | 1108 | *al = SSL_AD_ILLEGAL_PARAMETER; |
6dd083fd MC |
1109 | return 0; |
1110 | } | |
1111 | ||
1112 | if (!PACKET_get_bytes(pkt, &data, s->s3->previous_server_finished_len) | |
1113 | || memcmp(data, s->s3->previous_server_finished, | |
1114 | s->s3->previous_server_finished_len) != 0) { | |
7fe97c07 | 1115 | SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
6dd083fd MC |
1116 | SSL_R_RENEGOTIATION_MISMATCH); |
1117 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
1118 | return 0; | |
1119 | } | |
1120 | s->s3->send_connection_binding = 1; | |
1121 | ||
1122 | return 1; | |
1123 | } | |
1124 | ||
61138358 MC |
1125 | int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, unsigned int context, |
1126 | X509 *x, size_t chainidx, int *al) | |
6dd083fd | 1127 | { |
fb34a0f4 MC |
1128 | if (s->ext.hostname == NULL) { |
1129 | *al = SSL_AD_INTERNAL_ERROR; | |
1130 | return 0; | |
1131 | } | |
1132 | ||
1133 | if (PACKET_remaining(pkt) > 0) { | |
1134 | *al = SSL_AD_DECODE_ERROR; | |
6dd083fd MC |
1135 | return 0; |
1136 | } | |
1137 | ||
1138 | if (!s->hit) { | |
aff8c126 | 1139 | if (s->session->ext.hostname != NULL) { |
6dd083fd MC |
1140 | *al = SSL_AD_INTERNAL_ERROR; |
1141 | return 0; | |
1142 | } | |
aff8c126 RS |
1143 | s->session->ext.hostname = OPENSSL_strdup(s->ext.hostname); |
1144 | if (s->session->ext.hostname == NULL) { | |
6dd083fd MC |
1145 | *al = SSL_AD_INTERNAL_ERROR; |
1146 | return 0; | |
1147 | } | |
1148 | } | |
1149 | ||
1150 | return 1; | |
1151 | } | |
1152 | ||
1153 | #ifndef OPENSSL_NO_EC | |
61138358 MC |
1154 | int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context, |
1155 | X509 *x, size_t chainidx, int *al) | |
6dd083fd | 1156 | { |
aff8c126 | 1157 | unsigned int ecpointformats_len; |
6dd083fd MC |
1158 | PACKET ecptformatlist; |
1159 | ||
1160 | if (!PACKET_as_length_prefixed_1(pkt, &ecptformatlist)) { | |
1161 | *al = SSL_AD_DECODE_ERROR; | |
1162 | return 0; | |
1163 | } | |
1164 | if (!s->hit) { | |
aff8c126 RS |
1165 | ecpointformats_len = PACKET_remaining(&ecptformatlist); |
1166 | s->session->ext.ecpointformats_len = 0; | |
6dd083fd | 1167 | |
aff8c126 RS |
1168 | OPENSSL_free(s->session->ext.ecpointformats); |
1169 | s->session->ext.ecpointformats = OPENSSL_malloc(ecpointformats_len); | |
1170 | if (s->session->ext.ecpointformats == NULL) { | |
6dd083fd MC |
1171 | *al = SSL_AD_INTERNAL_ERROR; |
1172 | return 0; | |
1173 | } | |
1174 | ||
aff8c126 | 1175 | s->session->ext.ecpointformats_len = ecpointformats_len; |
6dd083fd MC |
1176 | |
1177 | if (!PACKET_copy_bytes(&ecptformatlist, | |
aff8c126 RS |
1178 | s->session->ext.ecpointformats, |
1179 | ecpointformats_len)) { | |
6dd083fd MC |
1180 | *al = SSL_AD_INTERNAL_ERROR; |
1181 | return 0; | |
1182 | } | |
1183 | } | |
1184 | ||
1185 | return 1; | |
1186 | } | |
1187 | #endif | |
1188 | ||
61138358 MC |
1189 | int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, unsigned int context, |
1190 | X509 *x, size_t chainidx, int *al) | |
6dd083fd | 1191 | { |
aff8c126 RS |
1192 | if (s->ext.session_ticket_cb != NULL && |
1193 | !s->ext.session_ticket_cb(s, PACKET_data(pkt), | |
1194 | PACKET_remaining(pkt), | |
1195 | s->ext.session_ticket_cb_arg)) { | |
6dd083fd MC |
1196 | *al = SSL_AD_INTERNAL_ERROR; |
1197 | return 0; | |
1198 | } | |
1266eefd | 1199 | |
fb34a0f4 | 1200 | if (!tls_use_ticket(s)) { |
6dd083fd MC |
1201 | *al = SSL_AD_UNSUPPORTED_EXTENSION; |
1202 | return 0; | |
1203 | } | |
fb34a0f4 MC |
1204 | if (PACKET_remaining(pkt) > 0) { |
1205 | *al = SSL_AD_DECODE_ERROR; | |
1206 | return 0; | |
1207 | } | |
1266eefd | 1208 | |
aff8c126 | 1209 | s->ext.ticket_expected = 1; |
6dd083fd MC |
1210 | |
1211 | return 1; | |
1212 | } | |
1213 | ||
ab83e314 | 1214 | #ifndef OPENSSL_NO_OCSP |
61138358 MC |
1215 | int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, unsigned int context, |
1216 | X509 *x, size_t chainidx, int *al) | |
6dd083fd MC |
1217 | { |
1218 | /* | |
f63e4288 MC |
1219 | * MUST only be sent if we've requested a status |
1220 | * request message. In TLS <= 1.2 it must also be empty. | |
6dd083fd | 1221 | */ |
fb34a0f4 | 1222 | if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) { |
6dd083fd MC |
1223 | *al = SSL_AD_UNSUPPORTED_EXTENSION; |
1224 | return 0; | |
1225 | } | |
fb34a0f4 MC |
1226 | if (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) > 0) { |
1227 | *al = SSL_AD_DECODE_ERROR; | |
1228 | return 0; | |
1229 | } | |
f63e4288 MC |
1230 | |
1231 | if (SSL_IS_TLS13(s)) { | |
1232 | /* We only know how to handle this if it's for the first Certificate in | |
1ee4b98e | 1233 | * the chain. We ignore any other responses. |
f63e4288 | 1234 | */ |
8521ced6 | 1235 | if (chainidx != 0) |
f63e4288 MC |
1236 | return 1; |
1237 | return tls_process_cert_status_body(s, pkt, al); | |
1238 | } | |
1239 | ||
6dd083fd | 1240 | /* Set flag to expect CertificateStatus message */ |
aff8c126 | 1241 | s->ext.status_expected = 1; |
6dd083fd MC |
1242 | |
1243 | return 1; | |
1244 | } | |
ab83e314 | 1245 | #endif |
6dd083fd MC |
1246 | |
1247 | ||
1248 | #ifndef OPENSSL_NO_CT | |
61138358 MC |
1249 | int tls_parse_stoc_sct(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1250 | size_t chainidx, int *al) | |
6dd083fd MC |
1251 | { |
1252 | /* | |
1253 | * Only take it if we asked for it - i.e if there is no CT validation | |
1254 | * callback set, then a custom extension MAY be processing it, so we | |
1255 | * need to let control continue to flow to that. | |
1256 | */ | |
1257 | if (s->ct_validation_callback != NULL) { | |
1258 | size_t size = PACKET_remaining(pkt); | |
1259 | ||
1260 | /* Simply copy it off for later processing */ | |
aff8c126 RS |
1261 | OPENSSL_free(s->ext.scts); |
1262 | s->ext.scts = NULL; | |
1266eefd | 1263 | |
aff8c126 | 1264 | s->ext.scts_len = size; |
6dd083fd | 1265 | if (size > 0) { |
aff8c126 RS |
1266 | s->ext.scts = OPENSSL_malloc(size); |
1267 | if (s->ext.scts == NULL | |
1268 | || !PACKET_copy_bytes(pkt, s->ext.scts, size)) { | |
6dd083fd MC |
1269 | *al = SSL_AD_INTERNAL_ERROR; |
1270 | return 0; | |
1271 | } | |
1272 | } | |
1273 | } else { | |
b186a592 MC |
1274 | ENDPOINT role = (context & SSL_EXT_TLS1_2_SERVER_HELLO) != 0 |
1275 | ? ENDPOINT_CLIENT : ENDPOINT_BOTH; | |
1276 | ||
1277 | /* | |
1278 | * If we didn't ask for it then there must be a custom extension, | |
1279 | * otherwise this is unsolicited. | |
1280 | */ | |
1281 | if (custom_ext_find(&s->cert->custext, role, | |
1282 | TLSEXT_TYPE_signed_certificate_timestamp, | |
1283 | NULL) == NULL) { | |
1284 | *al = TLS1_AD_UNSUPPORTED_EXTENSION; | |
1285 | return 0; | |
1286 | } | |
1287 | ||
43ae5eed MC |
1288 | if (custom_ext_parse(s, context, |
1289 | TLSEXT_TYPE_signed_certificate_timestamp, | |
1290 | PACKET_data(pkt), PACKET_remaining(pkt), | |
1291 | x, chainidx, al) <= 0) | |
6dd083fd MC |
1292 | return 0; |
1293 | } | |
1294 | ||
1295 | return 1; | |
1296 | } | |
1297 | #endif | |
1298 | ||
1299 | ||
1300 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
1301 | /* | |
1302 | * ssl_next_proto_validate validates a Next Protocol Negotiation block. No | |
1303 | * elements of zero length are allowed and the set of elements must exactly | |
1304 | * fill the length of the block. Returns 1 on success or 0 on failure. | |
1305 | */ | |
1306 | static int ssl_next_proto_validate(PACKET *pkt) | |
1307 | { | |
1308 | PACKET tmp_protocol; | |
1309 | ||
1310 | while (PACKET_remaining(pkt)) { | |
1311 | if (!PACKET_get_length_prefixed_1(pkt, &tmp_protocol) | |
1312 | || PACKET_remaining(&tmp_protocol) == 0) | |
1313 | return 0; | |
1314 | } | |
1315 | ||
1316 | return 1; | |
1317 | } | |
1318 | ||
61138358 MC |
1319 | int tls_parse_stoc_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1320 | size_t chainidx, int *al) | |
6dd083fd MC |
1321 | { |
1322 | unsigned char *selected; | |
1323 | unsigned char selected_len; | |
1324 | PACKET tmppkt; | |
1325 | ||
1266eefd | 1326 | /* Check if we are in a renegotiation. If so ignore this extension */ |
c7f47786 | 1327 | if (!SSL_IS_FIRST_HANDSHAKE(s)) |
6dd083fd MC |
1328 | return 1; |
1329 | ||
1330 | /* We must have requested it. */ | |
aff8c126 | 1331 | if (s->ctx->ext.npn_select_cb == NULL) { |
6dd083fd MC |
1332 | *al = SSL_AD_UNSUPPORTED_EXTENSION; |
1333 | return 0; | |
1334 | } | |
1266eefd | 1335 | |
6dd083fd MC |
1336 | /* The data must be valid */ |
1337 | tmppkt = *pkt; | |
1338 | if (!ssl_next_proto_validate(&tmppkt)) { | |
1339 | *al = SSL_AD_DECODE_ERROR; | |
1340 | return 0; | |
1341 | } | |
aff8c126 RS |
1342 | if (s->ctx->ext.npn_select_cb(s, &selected, &selected_len, |
1343 | PACKET_data(pkt), | |
1344 | PACKET_remaining(pkt), | |
1345 | s->ctx->ext.npn_select_cb_arg) != | |
6dd083fd MC |
1346 | SSL_TLSEXT_ERR_OK) { |
1347 | *al = SSL_AD_INTERNAL_ERROR; | |
1348 | return 0; | |
1349 | } | |
1266eefd | 1350 | |
6dd083fd MC |
1351 | /* |
1352 | * Could be non-NULL if server has sent multiple NPN extensions in | |
1353 | * a single Serverhello | |
1354 | */ | |
aff8c126 RS |
1355 | OPENSSL_free(s->ext.npn); |
1356 | s->ext.npn = OPENSSL_malloc(selected_len); | |
1357 | if (s->ext.npn == NULL) { | |
6dd083fd MC |
1358 | *al = SSL_AD_INTERNAL_ERROR; |
1359 | return 0; | |
1360 | } | |
1361 | ||
aff8c126 RS |
1362 | memcpy(s->ext.npn, selected, selected_len); |
1363 | s->ext.npn_len = selected_len; | |
1364 | s->s3->npn_seen = 1; | |
6dd083fd MC |
1365 | |
1366 | return 1; | |
1367 | } | |
1368 | #endif | |
1369 | ||
61138358 MC |
1370 | int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1371 | size_t chainidx, int *al) | |
6dd083fd MC |
1372 | { |
1373 | size_t len; | |
1374 | ||
1375 | /* We must have requested it. */ | |
1376 | if (!s->s3->alpn_sent) { | |
1377 | *al = SSL_AD_UNSUPPORTED_EXTENSION; | |
1378 | return 0; | |
1379 | } | |
1380 | /*- | |
1381 | * The extension data consists of: | |
1382 | * uint16 list_length | |
1383 | * uint8 proto_length; | |
1384 | * uint8 proto[proto_length]; | |
1385 | */ | |
1386 | if (!PACKET_get_net_2_len(pkt, &len) | |
1387 | || PACKET_remaining(pkt) != len || !PACKET_get_1_len(pkt, &len) | |
1388 | || PACKET_remaining(pkt) != len) { | |
1389 | *al = SSL_AD_DECODE_ERROR; | |
1390 | return 0; | |
1391 | } | |
1392 | OPENSSL_free(s->s3->alpn_selected); | |
1393 | s->s3->alpn_selected = OPENSSL_malloc(len); | |
1394 | if (s->s3->alpn_selected == NULL) { | |
1395 | *al = SSL_AD_INTERNAL_ERROR; | |
1396 | return 0; | |
1397 | } | |
1398 | if (!PACKET_copy_bytes(pkt, s->s3->alpn_selected, len)) { | |
1399 | *al = SSL_AD_DECODE_ERROR; | |
1400 | return 0; | |
1401 | } | |
1402 | s->s3->alpn_selected_len = len; | |
1403 | ||
4be3a7c7 MC |
1404 | if (s->session->ext.alpn_selected != NULL |
1405 | && (s->session->ext.alpn_selected_len != len | |
1406 | || memcmp(s->session->ext.alpn_selected, s->s3->alpn_selected, | |
1407 | len) != 0)) { | |
1408 | /* ALPN not consistent with the old session so cannot use early_data */ | |
1409 | s->ext.early_data_ok = 0; | |
1410 | } | |
1411 | if (!s->hit) { | |
1412 | /* If a new session then update it with the selected ALPN */ | |
1413 | s->session->ext.alpn_selected = | |
1414 | OPENSSL_memdup(s->s3->alpn_selected, s->s3->alpn_selected_len); | |
1415 | if (s->session->ext.alpn_selected == NULL) { | |
1416 | *al = SSL_AD_INTERNAL_ERROR; | |
1417 | return 0; | |
1418 | } | |
1419 | s->session->ext.alpn_selected_len = s->s3->alpn_selected_len; | |
ae8d7d99 MC |
1420 | } |
1421 | ||
6dd083fd MC |
1422 | return 1; |
1423 | } | |
1424 | ||
1425 | #ifndef OPENSSL_NO_SRTP | |
61138358 MC |
1426 | int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1427 | size_t chainidx, int *al) | |
6dd083fd MC |
1428 | { |
1429 | unsigned int id, ct, mki; | |
1430 | int i; | |
1431 | STACK_OF(SRTP_PROTECTION_PROFILE) *clnt; | |
1432 | SRTP_PROTECTION_PROFILE *prof; | |
1433 | ||
1266eefd MC |
1434 | if (!PACKET_get_net_2(pkt, &ct) || ct != 2 |
1435 | || !PACKET_get_net_2(pkt, &id) | |
1436 | || !PACKET_get_1(pkt, &mki) | |
1437 | || PACKET_remaining(pkt) != 0) { | |
7fe97c07 | 1438 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, |
6dd083fd MC |
1439 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
1440 | *al = SSL_AD_DECODE_ERROR; | |
1441 | return 0; | |
1442 | } | |
1443 | ||
1444 | if (mki != 0) { | |
1445 | /* Must be no MKI, since we never offer one */ | |
7fe97c07 | 1446 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, SSL_R_BAD_SRTP_MKI_VALUE); |
6dd083fd MC |
1447 | *al = SSL_AD_ILLEGAL_PARAMETER; |
1448 | return 0; | |
1449 | } | |
1450 | ||
6dd083fd | 1451 | /* Throw an error if the server gave us an unsolicited extension */ |
1266eefd | 1452 | clnt = SSL_get_srtp_profiles(s); |
6dd083fd | 1453 | if (clnt == NULL) { |
7fe97c07 | 1454 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, SSL_R_NO_SRTP_PROFILES); |
6dd083fd MC |
1455 | *al = SSL_AD_DECODE_ERROR; |
1456 | return 0; | |
1457 | } | |
1458 | ||
1459 | /* | |
1460 | * Check to see if the server gave us something we support (and | |
1461 | * presumably offered) | |
1462 | */ | |
1463 | for (i = 0; i < sk_SRTP_PROTECTION_PROFILE_num(clnt); i++) { | |
1464 | prof = sk_SRTP_PROTECTION_PROFILE_value(clnt, i); | |
1465 | ||
1466 | if (prof->id == id) { | |
1467 | s->srtp_profile = prof; | |
1468 | *al = 0; | |
1469 | return 1; | |
1470 | } | |
1471 | } | |
1472 | ||
7fe97c07 | 1473 | SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, |
6dd083fd MC |
1474 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); |
1475 | *al = SSL_AD_DECODE_ERROR; | |
1476 | return 0; | |
1477 | } | |
1478 | #endif | |
1479 | ||
61138358 MC |
1480 | int tls_parse_stoc_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1481 | size_t chainidx, int *al) | |
6dd083fd MC |
1482 | { |
1483 | /* Ignore if inappropriate ciphersuite */ | |
1484 | if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC) | |
1485 | && s->s3->tmp.new_cipher->algorithm_mac != SSL_AEAD | |
1486 | && s->s3->tmp.new_cipher->algorithm_enc != SSL_RC4) | |
28a31a0a | 1487 | s->ext.use_etm = 1; |
6dd083fd MC |
1488 | |
1489 | return 1; | |
1490 | } | |
1491 | ||
61138358 MC |
1492 | int tls_parse_stoc_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1493 | size_t chainidx, int *al) | |
6dd083fd MC |
1494 | { |
1495 | s->s3->flags |= TLS1_FLAGS_RECEIVED_EXTMS; | |
1496 | if (!s->hit) | |
1497 | s->session->flags |= SSL_SESS_FLAG_EXTMS; | |
1498 | ||
1499 | return 1; | |
1500 | } | |
1501 | ||
61138358 MC |
1502 | int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1503 | size_t chainidx, int *al) | |
6dd083fd | 1504 | { |
3cf96e88 | 1505 | #ifndef OPENSSL_NO_TLS1_3 |
6dd083fd MC |
1506 | unsigned int group_id; |
1507 | PACKET encoded_pt; | |
1508 | EVP_PKEY *ckey = s->s3->tmp.pkey, *skey = NULL; | |
1509 | ||
1510 | /* Sanity check */ | |
090c8118 | 1511 | if (ckey == NULL || s->s3->peer_tmp != NULL) { |
6dd083fd | 1512 | *al = SSL_AD_INTERNAL_ERROR; |
7fe97c07 | 1513 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1514 | return 0; |
1515 | } | |
1516 | ||
1517 | if (!PACKET_get_net_2(pkt, &group_id)) { | |
f69fe73a | 1518 | *al = SSL_AD_DECODE_ERROR; |
7fe97c07 | 1519 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_LENGTH_MISMATCH); |
6dd083fd MC |
1520 | return 0; |
1521 | } | |
1522 | ||
fe874d27 | 1523 | if ((context & SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST) != 0) { |
3847d426 MC |
1524 | unsigned const char *pcurves = NULL; |
1525 | size_t i, num_curves; | |
1526 | ||
1527 | if (PACKET_remaining(pkt) != 0) { | |
f69fe73a | 1528 | *al = SSL_AD_DECODE_ERROR; |
3847d426 MC |
1529 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_LENGTH_MISMATCH); |
1530 | return 0; | |
1531 | } | |
1532 | ||
1533 | /* | |
1534 | * It is an error if the HelloRetryRequest wants a key_share that we | |
1535 | * already sent in the first ClientHello | |
1536 | */ | |
1537 | if (group_id == s->s3->group_id) { | |
1538 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
1539 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE); | |
1540 | return 0; | |
1541 | } | |
1542 | ||
1543 | /* Validate the selected group is one we support */ | |
3847d426 MC |
1544 | if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) { |
1545 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); | |
1546 | return 0; | |
1547 | } | |
1548 | for (i = 0; i < num_curves; i++, pcurves += 2) { | |
0dd7ba24 | 1549 | if (group_id == bytestogroup(pcurves)) |
3847d426 MC |
1550 | break; |
1551 | } | |
1552 | if (i >= num_curves | |
1553 | || !tls_curve_allowed(s, pcurves, SSL_SECOP_CURVE_SUPPORTED)) { | |
1554 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
1555 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE); | |
1556 | return 0; | |
1557 | } | |
1558 | ||
1559 | s->s3->group_id = group_id; | |
1560 | EVP_PKEY_free(s->s3->tmp.pkey); | |
1561 | s->s3->tmp.pkey = NULL; | |
1562 | return 1; | |
1563 | } | |
1564 | ||
6dd083fd MC |
1565 | if (group_id != s->s3->group_id) { |
1566 | /* | |
1567 | * This isn't for the group that we sent in the original | |
1568 | * key_share! | |
1569 | */ | |
f69fe73a | 1570 | *al = SSL_AD_ILLEGAL_PARAMETER; |
7fe97c07 | 1571 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE); |
6dd083fd MC |
1572 | return 0; |
1573 | } | |
1574 | ||
1575 | if (!PACKET_as_length_prefixed_2(pkt, &encoded_pt) | |
1576 | || PACKET_remaining(&encoded_pt) == 0) { | |
1577 | *al = SSL_AD_DECODE_ERROR; | |
7fe97c07 | 1578 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_LENGTH_MISMATCH); |
6dd083fd MC |
1579 | return 0; |
1580 | } | |
1581 | ||
1582 | skey = ssl_generate_pkey(ckey); | |
1583 | if (skey == NULL) { | |
1584 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 1585 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_MALLOC_FAILURE); |
6dd083fd MC |
1586 | return 0; |
1587 | } | |
1588 | if (!EVP_PKEY_set1_tls_encodedpoint(skey, PACKET_data(&encoded_pt), | |
1589 | PACKET_remaining(&encoded_pt))) { | |
fb34a0f4 | 1590 | *al = SSL_AD_ILLEGAL_PARAMETER; |
7fe97c07 | 1591 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_ECPOINT); |
a1d6a0b6 | 1592 | EVP_PKEY_free(skey); |
6dd083fd MC |
1593 | return 0; |
1594 | } | |
1595 | ||
1596 | if (ssl_derive(s, ckey, skey, 1) == 0) { | |
1597 | *al = SSL_AD_INTERNAL_ERROR; | |
7fe97c07 | 1598 | SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); |
6dd083fd MC |
1599 | EVP_PKEY_free(skey); |
1600 | return 0; | |
1601 | } | |
090c8118 | 1602 | s->s3->peer_tmp = skey; |
3cf96e88 | 1603 | #endif |
6dd083fd MC |
1604 | |
1605 | return 1; | |
1606 | } | |
4ff65f77 | 1607 | |
cfef5027 MC |
1608 | int tls_parse_stoc_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1609 | size_t chainidx, int *al) | |
1610 | { | |
1611 | PACKET cookie; | |
1612 | ||
1613 | if (!PACKET_as_length_prefixed_2(pkt, &cookie) | |
1614 | || !PACKET_memdup(&cookie, &s->ext.tls13_cookie, | |
1615 | &s->ext.tls13_cookie_len)) { | |
1616 | *al = SSL_AD_DECODE_ERROR; | |
1617 | SSLerr(SSL_F_TLS_PARSE_STOC_COOKIE, SSL_R_LENGTH_MISMATCH); | |
1618 | return 0; | |
1619 | } | |
1620 | ||
1621 | return 1; | |
1622 | } | |
1623 | ||
38df5a45 MC |
1624 | int tls_parse_stoc_early_data(SSL *s, PACKET *pkt, unsigned int context, |
1625 | X509 *x, size_t chainidx, int *al) | |
1626 | { | |
fe874d27 | 1627 | if (context == SSL_EXT_TLS1_3_NEW_SESSION_TICKET) { |
6594189f MC |
1628 | unsigned long max_early_data; |
1629 | ||
1630 | if (!PACKET_get_net_4(pkt, &max_early_data) | |
1631 | || PACKET_remaining(pkt) != 0) { | |
1632 | SSLerr(SSL_F_TLS_PARSE_STOC_EARLY_DATA, | |
1633 | SSL_R_INVALID_MAX_EARLY_DATA); | |
1634 | *al = SSL_AD_DECODE_ERROR; | |
1635 | return 0; | |
1636 | } | |
1637 | ||
1638 | s->session->ext.max_early_data = max_early_data; | |
1639 | ||
1640 | return 1; | |
1641 | } | |
1642 | ||
38df5a45 MC |
1643 | if (PACKET_remaining(pkt) != 0) { |
1644 | *al = SSL_AD_DECODE_ERROR; | |
1645 | return 0; | |
1646 | } | |
1647 | ||
4be3a7c7 | 1648 | if (!s->ext.early_data_ok |
38df5a45 MC |
1649 | || !s->hit |
1650 | || s->session->ext.tick_identity != 0) { | |
1651 | /* | |
1652 | * If we get here then we didn't send early data, or we didn't resume | |
4be3a7c7 MC |
1653 | * using the first identity, or the SNI/ALPN is not consistent so the |
1654 | * server should not be accepting it. | |
38df5a45 MC |
1655 | */ |
1656 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
1657 | return 0; | |
1658 | } | |
1659 | ||
1660 | s->ext.early_data = SSL_EARLY_DATA_ACCEPTED; | |
1661 | ||
1662 | return 1; | |
1663 | } | |
1664 | ||
61138358 MC |
1665 | int tls_parse_stoc_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
1666 | size_t chainidx, int *al) | |
4ff65f77 MC |
1667 | { |
1668 | #ifndef OPENSSL_NO_TLS1_3 | |
1669 | unsigned int identity; | |
1670 | ||
1671 | if (!PACKET_get_net_2(pkt, &identity) || PACKET_remaining(pkt) != 0) { | |
f69fe73a | 1672 | *al = SSL_AD_DECODE_ERROR; |
4ff65f77 MC |
1673 | SSLerr(SSL_F_TLS_PARSE_STOC_PSK, SSL_R_LENGTH_MISMATCH); |
1674 | return 0; | |
1675 | } | |
1676 | ||
9368f865 MC |
1677 | if (s->session->ext.tick_identity == (int)identity) { |
1678 | s->hit = 1; | |
1679 | SSL_SESSION_free(s->psksession); | |
1680 | s->psksession = NULL; | |
1681 | return 1; | |
1682 | } | |
1683 | ||
1684 | if (s->psksession == NULL | |
1685 | || s->psksession->ext.tick_identity != (int)identity) { | |
f69fe73a | 1686 | *al = SSL_AD_ILLEGAL_PARAMETER; |
4ff65f77 MC |
1687 | SSLerr(SSL_F_TLS_PARSE_STOC_PSK, SSL_R_BAD_PSK_IDENTITY); |
1688 | return 0; | |
1689 | } | |
1690 | ||
add8d0e9 MC |
1691 | /* |
1692 | * If we used the external PSK for sending early_data then s->early_secret | |
1693 | * is already set up, so don't overwrite it. Otherwise we copy the | |
1694 | * early_secret across that we generated earlier. | |
1695 | */ | |
1696 | if ((s->early_data_state != SSL_EARLY_DATA_WRITE_RETRY | |
1697 | && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING) | |
1698 | || s->session->ext.max_early_data > 0 | |
1699 | || s->psksession->ext.max_early_data == 0) | |
1700 | memcpy(s->early_secret, s->psksession->early_secret, EVP_MAX_MD_SIZE); | |
1701 | ||
9368f865 MC |
1702 | SSL_SESSION_free(s->session); |
1703 | s->session = s->psksession; | |
1704 | s->psksession = NULL; | |
4ff65f77 MC |
1705 | s->hit = 1; |
1706 | #endif | |
1707 | ||
1708 | return 1; | |
1709 | } |