]>
Commit | Line | Data |
---|---|---|
6b473aca | 1 | /* |
b186a592 | 2 | * Copyright 2016-2017 The OpenSSL Project Authors. All Rights Reserved. |
6b473aca 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 | ||
f6370040 | 10 | #include <string.h> |
677963e5 | 11 | #include "internal/nelem.h" |
6b473aca MC |
12 | #include "../ssl_locl.h" |
13 | #include "statem_locl.h" | |
14 | ||
1266eefd | 15 | static int final_renegotiate(SSL *s, unsigned int context, int sent, |
805a2e9e | 16 | int *al); |
1266eefd MC |
17 | static int init_server_name(SSL *s, unsigned int context); |
18 | static int final_server_name(SSL *s, unsigned int context, int sent, | |
805a2e9e | 19 | int *al); |
332eb390 | 20 | #ifndef OPENSSL_NO_EC |
1266eefd | 21 | static int final_ec_pt_formats(SSL *s, unsigned int context, int sent, |
332eb390 MC |
22 | int *al); |
23 | #endif | |
1266eefd | 24 | static int init_session_ticket(SSL *s, unsigned int context); |
8f8c11d8 | 25 | #ifndef OPENSSL_NO_OCSP |
1266eefd | 26 | static int init_status_request(SSL *s, unsigned int context); |
8f8c11d8 | 27 | #endif |
805a2e9e | 28 | #ifndef OPENSSL_NO_NEXTPROTONEG |
1266eefd | 29 | static int init_npn(SSL *s, unsigned int context); |
805a2e9e | 30 | #endif |
1266eefd | 31 | static int init_alpn(SSL *s, unsigned int context); |
1266eefd | 32 | static int init_sig_algs(SSL *s, unsigned int context); |
45615c5f | 33 | static int init_certificate_authorities(SSL *s, unsigned int context); |
b186a592 MC |
34 | static EXT_RETURN tls_construct_certificate_authorities(SSL *s, WPACKET *pkt, |
35 | unsigned int context, | |
36 | X509 *x, | |
37 | size_t chainidx, | |
38 | int *al); | |
45615c5f DSH |
39 | static int tls_parse_certificate_authorities(SSL *s, PACKET *pkt, |
40 | unsigned int context, X509 *x, | |
41 | size_t chainidx, int *al); | |
805a2e9e | 42 | #ifndef OPENSSL_NO_SRP |
1266eefd | 43 | static int init_srp(SSL *s, unsigned int context); |
805a2e9e | 44 | #endif |
1266eefd MC |
45 | static int init_etm(SSL *s, unsigned int context); |
46 | static int init_ems(SSL *s, unsigned int context); | |
47 | static int final_ems(SSL *s, unsigned int context, int sent, int *al); | |
b2f7e8c0 | 48 | static int init_psk_kex_modes(SSL *s, unsigned int context); |
deb2d5e7 | 49 | #ifndef OPENSSL_NO_EC |
f4bbb37c | 50 | static int final_key_share(SSL *s, unsigned int context, int sent, int *al); |
deb2d5e7 | 51 | #endif |
805a2e9e | 52 | #ifndef OPENSSL_NO_SRTP |
1266eefd | 53 | static int init_srtp(SSL *s, unsigned int context); |
805a2e9e | 54 | #endif |
04904312 | 55 | static int final_sig_algs(SSL *s, unsigned int context, int sent, int *al); |
38df5a45 | 56 | static int final_early_data(SSL *s, unsigned int context, int sent, int *al); |
805a2e9e | 57 | |
70af3d8e | 58 | /* Structure to define a built-in extension */ |
1266eefd MC |
59 | typedef struct extensions_definition_st { |
60 | /* The defined type for the extension */ | |
6b473aca | 61 | unsigned int type; |
1266eefd MC |
62 | /* |
63 | * The context that this extension applies to, e.g. what messages and | |
64 | * protocol versions | |
65 | */ | |
66 | unsigned int context; | |
68db4dda | 67 | /* |
805a2e9e MC |
68 | * Initialise extension before parsing. Always called for relevant contexts |
69 | * even if extension not present | |
68db4dda | 70 | */ |
1266eefd MC |
71 | int (*init)(SSL *s, unsigned int context); |
72 | /* Parse extension sent from client to server */ | |
61138358 MC |
73 | int (*parse_ctos)(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
74 | size_t chainidx, int *al); | |
1266eefd | 75 | /* Parse extension send from server to client */ |
61138358 MC |
76 | int (*parse_stoc)(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
77 | size_t chainidx, int *al); | |
1266eefd | 78 | /* Construct extension sent from server to client */ |
b186a592 MC |
79 | EXT_RETURN (*construct_stoc)(SSL *s, WPACKET *pkt, unsigned int context, |
80 | X509 *x, size_t chainidx, int *al); | |
1266eefd | 81 | /* Construct extension sent from client to server */ |
b186a592 MC |
82 | EXT_RETURN (*construct_ctos)(SSL *s, WPACKET *pkt, unsigned int context, |
83 | X509 *x, size_t chainidx, int *al); | |
68db4dda | 84 | /* |
805a2e9e MC |
85 | * Finalise extension after parsing. Always called where an extensions was |
86 | * initialised even if the extension was not present. |sent| is set to 1 if | |
87 | * the extension was seen, or 0 otherwise. | |
68db4dda | 88 | */ |
1266eefd | 89 | int (*final)(SSL *s, unsigned int context, int sent, int *al); |
6b473aca MC |
90 | } EXTENSION_DEFINITION; |
91 | ||
4b299b8e | 92 | /* |
70af3d8e | 93 | * Definitions of all built-in extensions. NOTE: Changes in the number or order |
bd91e3c8 | 94 | * of these extensions should be mirrored with equivalent changes to the |
3e6c1da8 | 95 | * indexes ( TLSEXT_IDX_* ) defined in ssl_locl.h. |
70af3d8e MC |
96 | * Each extension has an initialiser, a client and |
97 | * server side parser and a finaliser. The initialiser is called (if the | |
98 | * extension is relevant to the given context) even if we did not see the | |
99 | * extension in the message that we received. The parser functions are only | |
100 | * called if we see the extension in the message. The finalisers are always | |
101 | * called if the initialiser was called. | |
102 | * There are also server and client side constructor functions which are always | |
103 | * called during message construction if the extension is relevant for the | |
104 | * given context. | |
105 | * The initialisation, parsing, finalisation and construction functions are | |
106 | * always called in the order defined in this list. Some extensions may depend | |
107 | * on others having been processed first, so the order of this list is | |
108 | * significant. | |
109 | * The extension context is defined by a series of flags which specify which | |
110 | * messages the extension is relevant to. These flags also specify whether the | |
3e6c1da8 | 111 | * extension is relevant to a particular protocol or protocol version. |
a1448c26 | 112 | * |
70af3d8e | 113 | * TODO(TLS1.3): Make sure we have a test to check the consistency of these |
10ed1b72 TS |
114 | * |
115 | * NOTE: WebSphere Application Server 7+ cannot handle empty extensions at | |
116 | * the end, keep these extensions before signature_algorithm. | |
4b299b8e | 117 | */ |
0785274c | 118 | #define INVALID_EXTENSION { 0x10000, 0, NULL, NULL, NULL, NULL, NULL, NULL } |
6b473aca MC |
119 | static const EXTENSION_DEFINITION ext_defs[] = { |
120 | { | |
121 | TLSEXT_TYPE_renegotiate, | |
fe874d27 MC |
122 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO |
123 | | SSL_EXT_SSL3_ALLOWED | SSL_EXT_TLS1_2_AND_BELOW_ONLY, | |
1266eefd MC |
124 | NULL, tls_parse_ctos_renegotiate, tls_parse_stoc_renegotiate, |
125 | tls_construct_stoc_renegotiate, tls_construct_ctos_renegotiate, | |
126 | final_renegotiate | |
6b473aca MC |
127 | }, |
128 | { | |
129 | TLSEXT_TYPE_server_name, | |
fe874d27 MC |
130 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO |
131 | | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, | |
1266eefd MC |
132 | init_server_name, |
133 | tls_parse_ctos_server_name, tls_parse_stoc_server_name, | |
134 | tls_construct_stoc_server_name, tls_construct_ctos_server_name, | |
135 | final_server_name | |
6b473aca MC |
136 | }, |
137 | #ifndef OPENSSL_NO_SRP | |
138 | { | |
139 | TLSEXT_TYPE_srp, | |
fe874d27 | 140 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_AND_BELOW_ONLY, |
1266eefd | 141 | init_srp, tls_parse_ctos_srp, NULL, NULL, tls_construct_ctos_srp, NULL |
6b473aca | 142 | }, |
0785274c MC |
143 | #else |
144 | INVALID_EXTENSION, | |
6b473aca MC |
145 | #endif |
146 | #ifndef OPENSSL_NO_EC | |
147 | { | |
148 | TLSEXT_TYPE_ec_point_formats, | |
fe874d27 MC |
149 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO |
150 | | SSL_EXT_TLS1_2_AND_BELOW_ONLY, | |
1266eefd MC |
151 | NULL, tls_parse_ctos_ec_pt_formats, tls_parse_stoc_ec_pt_formats, |
152 | tls_construct_stoc_ec_pt_formats, tls_construct_ctos_ec_pt_formats, | |
153 | final_ec_pt_formats | |
6b473aca MC |
154 | }, |
155 | { | |
156 | TLSEXT_TYPE_supported_groups, | |
fe874d27 | 157 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, |
1266eefd | 158 | NULL, tls_parse_ctos_supported_groups, NULL, |
6af87546 | 159 | tls_construct_stoc_supported_groups, |
1266eefd | 160 | tls_construct_ctos_supported_groups, NULL |
6b473aca | 161 | }, |
0785274c MC |
162 | #else |
163 | INVALID_EXTENSION, | |
164 | INVALID_EXTENSION, | |
6b473aca MC |
165 | #endif |
166 | { | |
167 | TLSEXT_TYPE_session_ticket, | |
fe874d27 MC |
168 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO |
169 | | SSL_EXT_TLS1_2_AND_BELOW_ONLY, | |
1266eefd MC |
170 | init_session_ticket, tls_parse_ctos_session_ticket, |
171 | tls_parse_stoc_session_ticket, tls_construct_stoc_session_ticket, | |
172 | tls_construct_ctos_session_ticket, NULL | |
6b473aca | 173 | }, |
ab83e314 | 174 | #ifndef OPENSSL_NO_OCSP |
6b473aca MC |
175 | { |
176 | TLSEXT_TYPE_status_request, | |
fe874d27 MC |
177 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO |
178 | | SSL_EXT_TLS1_3_CERTIFICATE, | |
1266eefd MC |
179 | init_status_request, tls_parse_ctos_status_request, |
180 | tls_parse_stoc_status_request, tls_construct_stoc_status_request, | |
f63e4288 | 181 | tls_construct_ctos_status_request, NULL |
6b473aca | 182 | }, |
0785274c MC |
183 | #else |
184 | INVALID_EXTENSION, | |
ab83e314 | 185 | #endif |
6b473aca MC |
186 | #ifndef OPENSSL_NO_NEXTPROTONEG |
187 | { | |
188 | TLSEXT_TYPE_next_proto_neg, | |
fe874d27 MC |
189 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO |
190 | | SSL_EXT_TLS1_2_AND_BELOW_ONLY, | |
1266eefd MC |
191 | init_npn, tls_parse_ctos_npn, tls_parse_stoc_npn, |
192 | tls_construct_stoc_next_proto_neg, tls_construct_ctos_npn, NULL | |
6b473aca | 193 | }, |
0785274c MC |
194 | #else |
195 | INVALID_EXTENSION, | |
6b473aca MC |
196 | #endif |
197 | { | |
02f0274e MC |
198 | /* |
199 | * Must appear in this list after server_name so that finalisation | |
200 | * happens after server_name callbacks | |
201 | */ | |
6b473aca | 202 | TLSEXT_TYPE_application_layer_protocol_negotiation, |
fe874d27 MC |
203 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO |
204 | | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, | |
1266eefd | 205 | init_alpn, tls_parse_ctos_alpn, tls_parse_stoc_alpn, |
5626f634 | 206 | tls_construct_stoc_alpn, tls_construct_ctos_alpn, NULL |
6b473aca | 207 | }, |
7da160b0 | 208 | #ifndef OPENSSL_NO_SRTP |
6b473aca MC |
209 | { |
210 | TLSEXT_TYPE_use_srtp, | |
fe874d27 MC |
211 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO |
212 | | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS | SSL_EXT_DTLS_ONLY, | |
1266eefd MC |
213 | init_srtp, tls_parse_ctos_use_srtp, tls_parse_stoc_use_srtp, |
214 | tls_construct_stoc_use_srtp, tls_construct_ctos_use_srtp, NULL | |
6b473aca | 215 | }, |
0785274c MC |
216 | #else |
217 | INVALID_EXTENSION, | |
7da160b0 | 218 | #endif |
6b473aca MC |
219 | { |
220 | TLSEXT_TYPE_encrypt_then_mac, | |
fe874d27 MC |
221 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO |
222 | | SSL_EXT_TLS1_2_AND_BELOW_ONLY, | |
1266eefd MC |
223 | init_etm, tls_parse_ctos_etm, tls_parse_stoc_etm, |
224 | tls_construct_stoc_etm, tls_construct_ctos_etm, NULL | |
6b473aca | 225 | }, |
6dd083fd | 226 | #ifndef OPENSSL_NO_CT |
6b473aca MC |
227 | { |
228 | TLSEXT_TYPE_signed_certificate_timestamp, | |
fe874d27 MC |
229 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO |
230 | | SSL_EXT_TLS1_3_CERTIFICATE, | |
68db4dda | 231 | NULL, |
6b473aca MC |
232 | /* |
233 | * No server side support for this, but can be provided by a custom | |
234 | * extension. This is an exception to the rule that custom extensions | |
235 | * cannot override built in ones. | |
236 | */ | |
1266eefd | 237 | NULL, tls_parse_stoc_sct, NULL, tls_construct_ctos_sct, NULL |
6b473aca | 238 | }, |
0785274c MC |
239 | #else |
240 | INVALID_EXTENSION, | |
6dd083fd | 241 | #endif |
6b473aca MC |
242 | { |
243 | TLSEXT_TYPE_extended_master_secret, | |
fe874d27 MC |
244 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO |
245 | | SSL_EXT_TLS1_2_AND_BELOW_ONLY, | |
1266eefd MC |
246 | init_ems, tls_parse_ctos_ems, tls_parse_stoc_ems, |
247 | tls_construct_stoc_ems, tls_construct_ctos_ems, final_ems | |
6b473aca | 248 | }, |
10ed1b72 TS |
249 | { |
250 | TLSEXT_TYPE_signature_algorithms, | |
251 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, | |
252 | init_sig_algs, tls_parse_ctos_sig_algs, | |
253 | tls_parse_ctos_sig_algs, tls_construct_ctos_sig_algs, | |
254 | tls_construct_ctos_sig_algs, final_sig_algs | |
255 | }, | |
6b473aca MC |
256 | { |
257 | TLSEXT_TYPE_supported_versions, | |
fe874d27 MC |
258 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS_IMPLEMENTATION_ONLY |
259 | | SSL_EXT_TLS1_3_ONLY, | |
68db4dda | 260 | NULL, |
6b473aca | 261 | /* Processed inline as part of version selection */ |
1266eefd | 262 | NULL, NULL, NULL, tls_construct_ctos_supported_versions, NULL |
6b473aca | 263 | }, |
b2f7e8c0 | 264 | { |
b2f7e8c0 | 265 | TLSEXT_TYPE_psk_kex_modes, |
fe874d27 MC |
266 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS_IMPLEMENTATION_ONLY |
267 | | SSL_EXT_TLS1_3_ONLY, | |
b2f7e8c0 MC |
268 | init_psk_kex_modes, tls_parse_ctos_psk_kex_modes, NULL, NULL, |
269 | tls_construct_ctos_psk_kex_modes, NULL | |
270 | }, | |
deb2d5e7 | 271 | #ifndef OPENSSL_NO_EC |
6b473aca | 272 | { |
70af3d8e MC |
273 | /* |
274 | * Must be in this list after supported_groups. We need that to have | |
275 | * been parsed before we do this one. | |
276 | */ | |
6b473aca | 277 | TLSEXT_TYPE_key_share, |
fe874d27 MC |
278 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_SERVER_HELLO |
279 | | SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST | SSL_EXT_TLS_IMPLEMENTATION_ONLY | |
280 | | SSL_EXT_TLS1_3_ONLY, | |
1266eefd | 281 | NULL, tls_parse_ctos_key_share, tls_parse_stoc_key_share, |
f4bbb37c MC |
282 | tls_construct_stoc_key_share, tls_construct_ctos_key_share, |
283 | final_key_share | |
7da160b0 | 284 | }, |
deb2d5e7 | 285 | #endif |
cfef5027 MC |
286 | { |
287 | TLSEXT_TYPE_cookie, | |
fe874d27 MC |
288 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST |
289 | | SSL_EXT_TLS_IMPLEMENTATION_ONLY | SSL_EXT_TLS1_3_ONLY, | |
cfef5027 MC |
290 | NULL, NULL, tls_parse_stoc_cookie, NULL, tls_construct_ctos_cookie, |
291 | NULL | |
292 | }, | |
7da160b0 MC |
293 | { |
294 | /* | |
295 | * Special unsolicited ServerHello extension only used when | |
296 | * SSL_OP_CRYPTOPRO_TLSEXT_BUG is set | |
297 | */ | |
298 | TLSEXT_TYPE_cryptopro_bug, | |
fe874d27 | 299 | SSL_EXT_TLS1_2_SERVER_HELLO | SSL_EXT_TLS1_2_AND_BELOW_ONLY, |
1266eefd | 300 | NULL, NULL, NULL, tls_construct_stoc_cryptopro_bug, NULL, NULL |
ab83e314 | 301 | }, |
38df5a45 MC |
302 | { |
303 | TLSEXT_TYPE_early_data, | |
fe874d27 MC |
304 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS |
305 | | SSL_EXT_TLS1_3_NEW_SESSION_TICKET, | |
38df5a45 MC |
306 | NULL, tls_parse_ctos_early_data, tls_parse_stoc_early_data, |
307 | tls_construct_stoc_early_data, tls_construct_ctos_early_data, | |
308 | final_early_data | |
309 | }, | |
45615c5f DSH |
310 | { |
311 | TLSEXT_TYPE_certificate_authorities, | |
fe874d27 MC |
312 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST |
313 | | SSL_EXT_TLS1_3_ONLY, | |
45615c5f DSH |
314 | init_certificate_authorities, |
315 | tls_parse_certificate_authorities, tls_parse_certificate_authorities, | |
316 | tls_construct_certificate_authorities, | |
317 | tls_construct_certificate_authorities, NULL, | |
318 | }, | |
ab83e314 | 319 | { |
ec15acb6 | 320 | /* Must be immediately before pre_shared_key */ |
ab83e314 | 321 | TLSEXT_TYPE_padding, |
fe874d27 | 322 | SSL_EXT_CLIENT_HELLO, |
68db4dda | 323 | NULL, |
ab83e314 | 324 | /* We send this, but don't read it */ |
1266eefd | 325 | NULL, NULL, NULL, tls_construct_ctos_padding, NULL |
ec15acb6 MC |
326 | }, |
327 | { | |
328 | /* Required by the TLSv1.3 spec to always be the last extension */ | |
329 | TLSEXT_TYPE_psk, | |
fe874d27 MC |
330 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_SERVER_HELLO |
331 | | SSL_EXT_TLS_IMPLEMENTATION_ONLY | SSL_EXT_TLS1_3_ONLY, | |
0247086d | 332 | NULL, tls_parse_ctos_psk, tls_parse_stoc_psk, tls_construct_stoc_psk, |
1053a6e2 | 333 | tls_construct_ctos_psk, NULL |
6b473aca MC |
334 | } |
335 | }; | |
336 | ||
43ae5eed MC |
337 | /* Check whether an extension's context matches the current context */ |
338 | static int validate_context(SSL *s, unsigned int extctx, unsigned int thisctx) | |
339 | { | |
340 | /* Check we're allowed to use this extension in this context */ | |
341 | if ((thisctx & extctx) == 0) | |
342 | return 0; | |
343 | ||
344 | if (SSL_IS_DTLS(s)) { | |
345 | if ((extctx & SSL_EXT_TLS_ONLY) != 0) | |
346 | return 0; | |
347 | } else if ((extctx & SSL_EXT_DTLS_ONLY) != 0) { | |
348 | return 0; | |
349 | } | |
350 | ||
351 | return 1; | |
352 | } | |
353 | ||
6b473aca MC |
354 | /* |
355 | * Verify whether we are allowed to use the extension |type| in the current | |
356 | * |context|. Returns 1 to indicate the extension is allowed or unknown or 0 to | |
70af3d8e | 357 | * indicate the extension is not allowed. If returning 1 then |*found| is set to |
69687aa8 | 358 | * the definition for the extension we found. |
6b473aca | 359 | */ |
70af3d8e | 360 | static int verify_extension(SSL *s, unsigned int context, unsigned int type, |
1266eefd MC |
361 | custom_ext_methods *meths, RAW_EXTENSION *rawexlist, |
362 | RAW_EXTENSION **found) | |
6b473aca MC |
363 | { |
364 | size_t i; | |
70af3d8e | 365 | size_t builtin_num = OSSL_NELEM(ext_defs); |
d270de32 | 366 | const EXTENSION_DEFINITION *thisext; |
6b473aca | 367 | |
1266eefd MC |
368 | for (i = 0, thisext = ext_defs; i < builtin_num; i++, thisext++) { |
369 | if (type == thisext->type) { | |
43ae5eed | 370 | if (!validate_context(s, thisext->context, context)) |
6b473aca MC |
371 | return 0; |
372 | ||
1266eefd | 373 | *found = &rawexlist[i]; |
6b473aca MC |
374 | return 1; |
375 | } | |
376 | } | |
377 | ||
70af3d8e MC |
378 | /* Check the custom extensions */ |
379 | if (meths != NULL) { | |
43ae5eed | 380 | size_t offset = 0; |
787d9ec7 | 381 | ENDPOINT role = ENDPOINT_BOTH; |
43ae5eed MC |
382 | custom_ext_method *meth = NULL; |
383 | ||
384 | if ((context & SSL_EXT_CLIENT_HELLO) != 0) | |
787d9ec7 | 385 | role = ENDPOINT_SERVER; |
43ae5eed | 386 | else if ((context & SSL_EXT_TLS1_2_SERVER_HELLO) != 0) |
787d9ec7 | 387 | role = ENDPOINT_CLIENT; |
43ae5eed | 388 | |
787d9ec7 | 389 | meth = custom_ext_find(meths, role, type, &offset); |
43ae5eed MC |
390 | if (meth != NULL) { |
391 | if (!validate_context(s, meth->context, context)) | |
392 | return 0; | |
393 | *found = &rawexlist[offset + builtin_num]; | |
394 | return 1; | |
6b473aca MC |
395 | } |
396 | } | |
397 | ||
70af3d8e | 398 | /* Unknown extension. We allow it */ |
1266eefd | 399 | *found = NULL; |
70af3d8e | 400 | return 1; |
6b473aca MC |
401 | } |
402 | ||
70af3d8e MC |
403 | /* |
404 | * Check whether the context defined for an extension |extctx| means whether | |
405 | * the extension is relevant for the current context |thisctx| or not. Returns | |
406 | * 1 if the extension is relevant for this context, and 0 otherwise | |
407 | */ | |
43ae5eed | 408 | int extension_is_relevant(SSL *s, unsigned int extctx, unsigned int thisctx) |
805a2e9e MC |
409 | { |
410 | if ((SSL_IS_DTLS(s) | |
fe874d27 | 411 | && (extctx & SSL_EXT_TLS_IMPLEMENTATION_ONLY) != 0) |
805a2e9e | 412 | || (s->version == SSL3_VERSION |
fe874d27 | 413 | && (extctx & SSL_EXT_SSL3_ALLOWED) == 0) |
805a2e9e | 414 | || (SSL_IS_TLS13(s) |
fe874d27 | 415 | && (extctx & SSL_EXT_TLS1_2_AND_BELOW_ONLY) != 0) |
43ae5eed MC |
416 | || (!SSL_IS_TLS13(s) && (extctx & SSL_EXT_TLS1_3_ONLY) != 0) |
417 | || (s->hit && (extctx & SSL_EXT_IGNORE_ON_RESUMPTION) != 0)) | |
805a2e9e MC |
418 | return 0; |
419 | ||
420 | return 1; | |
421 | } | |
422 | ||
6b473aca MC |
423 | /* |
424 | * Gather a list of all the extensions from the data in |packet]. |context| | |
70af3d8e | 425 | * tells us which message this extension is for. The raw extension data is |
1266eefd MC |
426 | * stored in |*res| on success. In the event of an error the alert type to use |
427 | * is stored in |*al|. We don't actually process the content of the extensions | |
428 | * yet, except to check their types. This function also runs the initialiser | |
735d5b59 TT |
429 | * functions for all known extensions if |init| is nonzero (whether we have |
430 | * collected them or not). If successful the caller is responsible for freeing | |
431 | * the contents of |*res|. | |
6b473aca MC |
432 | * |
433 | * Per http://tools.ietf.org/html/rfc5246#section-7.4.1.4, there may not be | |
434 | * more than one extension of the same type in a ClientHello or ServerHello. | |
435 | * This function returns 1 if all extensions are unique and we have parsed their | |
436 | * types, and 0 if the extensions contain duplicates, could not be successfully | |
1266eefd | 437 | * found, or an internal error occurred. We only check duplicates for |
70af3d8e | 438 | * extensions that we know about. We ignore others. |
6b473aca | 439 | */ |
6b473aca | 440 | int tls_collect_extensions(SSL *s, PACKET *packet, unsigned int context, |
735d5b59 TT |
441 | RAW_EXTENSION **res, int *al, size_t *len, |
442 | int init) | |
6b473aca MC |
443 | { |
444 | PACKET extensions = *packet; | |
d270de32 | 445 | size_t i = 0; |
fc5ece2e | 446 | size_t num_exts; |
43ae5eed | 447 | custom_ext_methods *exts = &s->cert->custext; |
6b473aca | 448 | RAW_EXTENSION *raw_extensions = NULL; |
d270de32 | 449 | const EXTENSION_DEFINITION *thisexd; |
6b473aca | 450 | |
ecc2f938 MC |
451 | *res = NULL; |
452 | ||
70af3d8e MC |
453 | /* |
454 | * Initialise server side custom extensions. Client side is done during | |
455 | * construction of extensions for the ClientHello. | |
456 | */ | |
43ae5eed MC |
457 | if ((context & SSL_EXT_CLIENT_HELLO) != 0) |
458 | custom_ext_init(&s->cert->custext); | |
70af3d8e | 459 | |
fc5ece2e BK |
460 | num_exts = OSSL_NELEM(ext_defs) + (exts != NULL ? exts->meths_count : 0); |
461 | raw_extensions = OPENSSL_zalloc(num_exts * sizeof(*raw_extensions)); | |
70af3d8e MC |
462 | if (raw_extensions == NULL) { |
463 | *al = SSL_AD_INTERNAL_ERROR; | |
464 | SSLerr(SSL_F_TLS_COLLECT_EXTENSIONS, ERR_R_MALLOC_FAILURE); | |
465 | return 0; | |
466 | } | |
467 | ||
193b5d76 | 468 | i = 0; |
6b473aca | 469 | while (PACKET_remaining(&extensions) > 0) { |
b186a592 | 470 | unsigned int type, idx; |
6b473aca | 471 | PACKET extension; |
1266eefd | 472 | RAW_EXTENSION *thisex; |
6b473aca MC |
473 | |
474 | if (!PACKET_get_net_2(&extensions, &type) || | |
475 | !PACKET_get_length_prefixed_2(&extensions, &extension)) { | |
476 | SSLerr(SSL_F_TLS_COLLECT_EXTENSIONS, SSL_R_BAD_EXTENSION); | |
70af3d8e | 477 | *al = SSL_AD_DECODE_ERROR; |
6b473aca MC |
478 | goto err; |
479 | } | |
70af3d8e MC |
480 | /* |
481 | * Verify this extension is allowed. We only check duplicates for | |
652a6b7e MC |
482 | * extensions that we recognise. We also have a special case for the |
483 | * PSK extension, which must be the last one in the ClientHello. | |
70af3d8e | 484 | */ |
1266eefd | 485 | if (!verify_extension(s, context, type, exts, raw_extensions, &thisex) |
652a6b7e MC |
486 | || (thisex != NULL && thisex->present == 1) |
487 | || (type == TLSEXT_TYPE_psk | |
fe874d27 | 488 | && (context & SSL_EXT_CLIENT_HELLO) != 0 |
652a6b7e | 489 | && PACKET_remaining(&extensions) != 0)) { |
6b473aca | 490 | SSLerr(SSL_F_TLS_COLLECT_EXTENSIONS, SSL_R_BAD_EXTENSION); |
70af3d8e | 491 | *al = SSL_AD_ILLEGAL_PARAMETER; |
6b473aca MC |
492 | goto err; |
493 | } | |
b186a592 MC |
494 | idx = thisex - raw_extensions; |
495 | /*- | |
496 | * Check that we requested this extension (if appropriate). Requests can | |
497 | * be sent in the ClientHello and CertificateRequest. Unsolicited | |
498 | * extensions can be sent in the NewSessionTicket. We only do this for | |
499 | * the built-in extensions. Custom extensions have a different but | |
500 | * similar check elsewhere. | |
501 | * Special cases: | |
502 | * - The HRR cookie extension is unsolicited | |
503 | * - The renegotiate extension is unsolicited (the client signals | |
504 | * support via an SCSV) | |
505 | * - The signed_certificate_timestamp extension can be provided by a | |
506 | * custom extension or by the built-in version. We let the extension | |
507 | * itself handle unsolicited response checks. | |
508 | */ | |
509 | if (idx < OSSL_NELEM(ext_defs) | |
510 | && (context & (SSL_EXT_CLIENT_HELLO | |
511 | | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST | |
512 | | SSL_EXT_TLS1_3_NEW_SESSION_TICKET)) == 0 | |
513 | && type != TLSEXT_TYPE_cookie | |
514 | && type != TLSEXT_TYPE_renegotiate | |
515 | && type != TLSEXT_TYPE_signed_certificate_timestamp | |
516 | && (s->ext.extflags[idx] & SSL_EXT_FLAG_SENT) == 0) { | |
355a0d10 | 517 | SSLerr(SSL_F_TLS_COLLECT_EXTENSIONS, SSL_R_UNSOLICITED_EXTENSION); |
b186a592 MC |
518 | *al = SSL_AD_UNSUPPORTED_EXTENSION; |
519 | goto err; | |
520 | } | |
1266eefd MC |
521 | if (thisex != NULL) { |
522 | thisex->data = extension; | |
523 | thisex->present = 1; | |
524 | thisex->type = type; | |
193b5d76 | 525 | thisex->received_order = i++; |
b93a295a TS |
526 | if (s->ext.debug_cb) |
527 | s->ext.debug_cb(s, !s->server, thisex->type, | |
528 | PACKET_data(&thisex->data), | |
529 | PACKET_remaining(&thisex->data), | |
530 | s->ext.debug_arg); | |
6b473aca MC |
531 | } |
532 | } | |
533 | ||
735d5b59 TT |
534 | if (init) { |
535 | /* | |
536 | * Initialise all known extensions relevant to this context, | |
537 | * whether we have found them or not | |
538 | */ | |
539 | for (thisexd = ext_defs, i = 0; i < OSSL_NELEM(ext_defs); | |
540 | i++, thisexd++) { | |
bf5c84f5 TT |
541 | if (thisexd->init != NULL && (thisexd->context & context) != 0 |
542 | && extension_is_relevant(s, thisexd->context, context) | |
543 | && !thisexd->init(s, context)) { | |
735d5b59 TT |
544 | *al = SSL_AD_INTERNAL_ERROR; |
545 | goto err; | |
546 | } | |
68db4dda MC |
547 | } |
548 | } | |
549 | ||
6b473aca | 550 | *res = raw_extensions; |
fc5ece2e BK |
551 | if (len != NULL) |
552 | *len = num_exts; | |
6b473aca MC |
553 | return 1; |
554 | ||
555 | err: | |
556 | OPENSSL_free(raw_extensions); | |
557 | return 0; | |
558 | } | |
559 | ||
68db4dda | 560 | /* |
70af3d8e MC |
561 | * Runs the parser for a given extension with index |idx|. |exts| contains the |
562 | * list of all parsed extensions previously collected by | |
563 | * tls_collect_extensions(). The parser is only run if it is applicable for the | |
f97d4c37 MC |
564 | * given |context| and the parser has not already been run. If this is for a |
565 | * Certificate message, then we also provide the parser with the relevant | |
8521ced6 | 566 | * Certificate |x| and its position in the |chainidx| with 0 being the first |
f97d4c37 MC |
567 | * Certificate. Returns 1 on success or 0 on failure. In the event of a failure |
568 | * |*al| is populated with a suitable alert code. If an extension is not present | |
569 | * this counted as success. | |
68db4dda | 570 | */ |
d270de32 | 571 | int tls_parse_extension(SSL *s, TLSEXT_INDEX idx, int context, |
8521ced6 | 572 | RAW_EXTENSION *exts, X509 *x, size_t chainidx, int *al) |
6b473aca | 573 | { |
70af3d8e | 574 | RAW_EXTENSION *currext = &exts[idx]; |
61138358 MC |
575 | int (*parser)(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
576 | size_t chainidx, int *al) = NULL; | |
6b473aca | 577 | |
70af3d8e MC |
578 | /* Skip if the extension is not present */ |
579 | if (!currext->present) | |
580 | return 1; | |
6b473aca | 581 | |
70af3d8e MC |
582 | /* Skip if we've already parsed this extension */ |
583 | if (currext->parsed) | |
584 | return 1; | |
6b473aca | 585 | |
70af3d8e MC |
586 | currext->parsed = 1; |
587 | ||
588 | if (idx < OSSL_NELEM(ext_defs)) { | |
589 | /* We are handling a built-in extension */ | |
590 | const EXTENSION_DEFINITION *extdef = &ext_defs[idx]; | |
591 | ||
592 | /* Check if extension is defined for our protocol. If not, skip */ | |
593 | if (!extension_is_relevant(s, extdef->context, context)) | |
594 | return 1; | |
595 | ||
1266eefd | 596 | parser = s->server ? extdef->parse_ctos : extdef->parse_stoc; |
224135e9 | 597 | |
1266eefd | 598 | if (parser != NULL) |
61138358 | 599 | return parser(s, &currext->data, context, x, chainidx, al); |
6b473aca | 600 | |
70af3d8e MC |
601 | /* |
602 | * If the parser is NULL we fall through to the custom extension | |
603 | * processing | |
604 | */ | |
6b473aca MC |
605 | } |
606 | ||
43ae5eed MC |
607 | /* Parse custom extensions */ |
608 | if (custom_ext_parse(s, context, currext->type, | |
609 | PACKET_data(&currext->data), | |
610 | PACKET_remaining(&currext->data), | |
611 | x, chainidx, al) <= 0) | |
70af3d8e MC |
612 | return 0; |
613 | ||
805a2e9e MC |
614 | return 1; |
615 | } | |
616 | ||
617 | /* | |
618 | * Parse all remaining extensions that have not yet been parsed. Also calls the | |
735d5b59 TT |
619 | * finalisation for all extensions at the end if |fin| is nonzero, whether we |
620 | * collected them or not. Returns 1 for success or 0 for failure. If we are | |
621 | * working on a Certificate message then we also pass the Certificate |x| and | |
622 | * its position in the |chainidx|, with 0 being the first certificate. On | |
623 | * failure, |*al| is populated with a suitable alert code. | |
805a2e9e | 624 | */ |
f97d4c37 | 625 | int tls_parse_all_extensions(SSL *s, int context, RAW_EXTENSION *exts, X509 *x, |
735d5b59 | 626 | size_t chainidx, int *al, int fin) |
805a2e9e | 627 | { |
1266eefd | 628 | size_t i, numexts = OSSL_NELEM(ext_defs); |
d270de32 | 629 | const EXTENSION_DEFINITION *thisexd; |
805a2e9e | 630 | |
70af3d8e | 631 | /* Calculate the number of extensions in the extensions list */ |
43ae5eed | 632 | numexts += s->cert->custext.meths_count; |
70af3d8e MC |
633 | |
634 | /* Parse each extension in turn */ | |
1266eefd | 635 | for (i = 0; i < numexts; i++) { |
8521ced6 | 636 | if (!tls_parse_extension(s, i, context, exts, x, chainidx, al)) |
70af3d8e MC |
637 | return 0; |
638 | } | |
805a2e9e | 639 | |
735d5b59 TT |
640 | if (fin) { |
641 | /* | |
642 | * Finalise all known extensions relevant to this context, | |
643 | * whether we have found them or not | |
644 | */ | |
645 | for (i = 0, thisexd = ext_defs; i < OSSL_NELEM(ext_defs); | |
646 | i++, thisexd++) { | |
bf5c84f5 TT |
647 | if (thisexd->final != NULL && (thisexd->context & context) != 0 |
648 | && !thisexd->final(s, context, exts[i].present, al)) | |
735d5b59 TT |
649 | return 0; |
650 | } | |
68db4dda MC |
651 | } |
652 | ||
6b473aca MC |
653 | return 1; |
654 | } | |
655 | ||
43ae5eed MC |
656 | int should_add_extension(SSL *s, unsigned int extctx, unsigned int thisctx, |
657 | int max_version) | |
658 | { | |
659 | /* Skip if not relevant for our context */ | |
660 | if ((extctx & thisctx) == 0) | |
661 | return 0; | |
662 | ||
663 | /* Check if this extension is defined for our protocol. If not, skip */ | |
664 | if ((SSL_IS_DTLS(s) && (extctx & SSL_EXT_TLS_IMPLEMENTATION_ONLY) != 0) | |
665 | || (s->version == SSL3_VERSION | |
666 | && (extctx & SSL_EXT_SSL3_ALLOWED) == 0) | |
667 | || (SSL_IS_TLS13(s) | |
668 | && (extctx & SSL_EXT_TLS1_2_AND_BELOW_ONLY) != 0) | |
669 | || (!SSL_IS_TLS13(s) | |
670 | && (extctx & SSL_EXT_TLS1_3_ONLY) != 0 | |
671 | && (thisctx & SSL_EXT_CLIENT_HELLO) == 0) | |
672 | || ((extctx & SSL_EXT_TLS1_3_ONLY) != 0 | |
673 | && (thisctx & SSL_EXT_CLIENT_HELLO) != 0 | |
674 | && (SSL_IS_DTLS(s) || max_version < TLS1_3_VERSION))) | |
675 | return 0; | |
676 | ||
677 | return 1; | |
678 | } | |
679 | ||
6b473aca | 680 | /* |
70af3d8e | 681 | * Construct all the extensions relevant to the current |context| and write |
30aeba43 | 682 | * them to |pkt|. If this is an extension for a Certificate in a Certificate |
8521ced6 MC |
683 | * message, then |x| will be set to the Certificate we are handling, and |
684 | * |chainidx| will indicate the position in the chainidx we are processing (with | |
685 | * 0 being the first in the chain). Returns 1 on success or 0 on failure. If a | |
686 | * failure occurs then |al| is populated with a suitable alert code. On a | |
687 | * failure construction stops at the first extension to fail to construct. | |
6b473aca | 688 | */ |
224135e9 | 689 | int tls_construct_extensions(SSL *s, WPACKET *pkt, unsigned int context, |
8521ced6 | 690 | X509 *x, size_t chainidx, int *al) |
224135e9 | 691 | { |
1266eefd | 692 | size_t i; |
43ae5eed | 693 | int min_version, max_version = 0, reason, tmpal; |
d270de32 | 694 | const EXTENSION_DEFINITION *thisexd; |
224135e9 | 695 | |
7da160b0 | 696 | /* |
70af3d8e | 697 | * Normally if something goes wrong during construction it's an internal |
7da160b0 MC |
698 | * error. We can always override this later. |
699 | */ | |
70af3d8e | 700 | tmpal = SSL_AD_INTERNAL_ERROR; |
7da160b0 | 701 | |
224135e9 MC |
702 | if (!WPACKET_start_sub_packet_u16(pkt) |
703 | /* | |
704 | * If extensions are of zero length then we don't even add the | |
7da160b0 | 705 | * extensions length bytes to a ClientHello/ServerHello in SSLv3 |
224135e9 | 706 | */ |
fe874d27 MC |
707 | || ((context & |
708 | (SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO)) != 0 | |
709 | && s->version == SSL3_VERSION | |
710 | && !WPACKET_set_flags(pkt, | |
224135e9 | 711 | WPACKET_FLAGS_ABANDON_ON_ZERO_LENGTH))) { |
224135e9 | 712 | SSLerr(SSL_F_TLS_CONSTRUCT_EXTENSIONS, ERR_R_INTERNAL_ERROR); |
70af3d8e | 713 | goto err; |
224135e9 MC |
714 | } |
715 | ||
fe874d27 | 716 | if ((context & SSL_EXT_CLIENT_HELLO) != 0) { |
38a73150 | 717 | reason = ssl_get_min_max_version(s, &min_version, &max_version); |
ab83e314 MC |
718 | if (reason != 0) { |
719 | SSLerr(SSL_F_TLS_CONSTRUCT_EXTENSIONS, reason); | |
70af3d8e | 720 | goto err; |
ab83e314 MC |
721 | } |
722 | } | |
723 | ||
724 | /* Add custom extensions first */ | |
fe874d27 | 725 | if ((context & SSL_EXT_CLIENT_HELLO) != 0) { |
44e69951 | 726 | /* On the server side with initialise during ClientHello parsing */ |
43ae5eed | 727 | custom_ext_init(&s->cert->custext); |
ab83e314 | 728 | } |
43ae5eed | 729 | if (!custom_ext_add(s, context, pkt, x, chainidx, max_version, &tmpal)) { |
ab83e314 | 730 | SSLerr(SSL_F_TLS_CONSTRUCT_EXTENSIONS, ERR_R_INTERNAL_ERROR); |
70af3d8e | 731 | goto err; |
ab83e314 MC |
732 | } |
733 | ||
1266eefd | 734 | for (i = 0, thisexd = ext_defs; i < OSSL_NELEM(ext_defs); i++, thisexd++) { |
b186a592 MC |
735 | EXT_RETURN (*construct)(SSL *s, WPACKET *pkt, unsigned int context, |
736 | X509 *x, size_t chainidx, int *al); | |
737 | EXT_RETURN ret; | |
4b299b8e | 738 | |
224135e9 | 739 | /* Skip if not relevant for our context */ |
43ae5eed | 740 | if (!should_add_extension(s, thisexd->context, context, max_version)) |
224135e9 MC |
741 | continue; |
742 | ||
1266eefd MC |
743 | construct = s->server ? thisexd->construct_stoc |
744 | : thisexd->construct_ctos; | |
224135e9 | 745 | |
43ae5eed | 746 | if (construct == NULL) |
224135e9 MC |
747 | continue; |
748 | ||
b186a592 MC |
749 | ret = construct(s, pkt, context, x, chainidx, &tmpal); |
750 | if (ret == EXT_RETURN_FAIL) | |
70af3d8e | 751 | goto err; |
b186a592 MC |
752 | if (ret == EXT_RETURN_SENT |
753 | && (context & (SSL_EXT_CLIENT_HELLO | |
754 | | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST | |
755 | | SSL_EXT_TLS1_3_NEW_SESSION_TICKET)) != 0) | |
756 | s->ext.extflags[i] |= SSL_EXT_FLAG_SENT; | |
224135e9 MC |
757 | } |
758 | ||
224135e9 | 759 | if (!WPACKET_close(pkt)) { |
224135e9 | 760 | SSLerr(SSL_F_TLS_CONSTRUCT_EXTENSIONS, ERR_R_INTERNAL_ERROR); |
70af3d8e | 761 | goto err; |
224135e9 MC |
762 | } |
763 | ||
764 | return 1; | |
70af3d8e MC |
765 | |
766 | err: | |
767 | *al = tmpal; | |
768 | return 0; | |
224135e9 | 769 | } |
805a2e9e | 770 | |
70af3d8e MC |
771 | /* |
772 | * Built in extension finalisation and initialisation functions. All initialise | |
773 | * or finalise the associated extension type for the given |context|. For | |
774 | * finalisers |sent| is set to 1 if we saw the extension during parsing, and 0 | |
775 | * otherwise. These functions return 1 on success or 0 on failure. In the event | |
776 | * of a failure then |*al| is populated with a suitable error code. | |
777 | */ | |
778 | ||
1266eefd | 779 | static int final_renegotiate(SSL *s, unsigned int context, int sent, |
805a2e9e MC |
780 | int *al) |
781 | { | |
332eb390 MC |
782 | if (!s->server) { |
783 | /* | |
784 | * Check if we can connect to a server that doesn't support safe | |
785 | * renegotiation | |
786 | */ | |
787 | if (!(s->options & SSL_OP_LEGACY_SERVER_CONNECT) | |
788 | && !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION) | |
789 | && !sent) { | |
790 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
7fe97c07 | 791 | SSLerr(SSL_F_FINAL_RENEGOTIATE, |
332eb390 MC |
792 | SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED); |
793 | return 0; | |
794 | } | |
795 | ||
805a2e9e | 796 | return 1; |
332eb390 | 797 | } |
805a2e9e MC |
798 | |
799 | /* Need RI if renegotiating */ | |
800 | if (s->renegotiate | |
801 | && !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION) | |
802 | && !sent) { | |
803 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
7fe97c07 | 804 | SSLerr(SSL_F_FINAL_RENEGOTIATE, |
805a2e9e MC |
805 | SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED); |
806 | return 0; | |
807 | } | |
808 | ||
332eb390 | 809 | |
805a2e9e MC |
810 | return 1; |
811 | } | |
812 | ||
1266eefd | 813 | static int init_server_name(SSL *s, unsigned int context) |
805a2e9e MC |
814 | { |
815 | if (s->server) | |
816 | s->servername_done = 0; | |
817 | ||
818 | return 1; | |
819 | } | |
820 | ||
1266eefd | 821 | static int final_server_name(SSL *s, unsigned int context, int sent, |
805a2e9e MC |
822 | int *al) |
823 | { | |
824 | int ret = SSL_TLSEXT_ERR_NOACK; | |
825 | int altmp = SSL_AD_UNRECOGNIZED_NAME; | |
826 | ||
aff8c126 RS |
827 | if (s->ctx != NULL && s->ctx->ext.servername_cb != 0) |
828 | ret = s->ctx->ext.servername_cb(s, &altmp, | |
829 | s->ctx->ext.servername_arg); | |
222da979 TS |
830 | else if (s->session_ctx != NULL |
831 | && s->session_ctx->ext.servername_cb != 0) | |
832 | ret = s->session_ctx->ext.servername_cb(s, &altmp, | |
833 | s->session_ctx->ext.servername_arg); | |
805a2e9e MC |
834 | |
835 | switch (ret) { | |
836 | case SSL_TLSEXT_ERR_ALERT_FATAL: | |
837 | *al = altmp; | |
838 | return 0; | |
839 | ||
840 | case SSL_TLSEXT_ERR_ALERT_WARNING: | |
841 | *al = altmp; | |
842 | return 1; | |
843 | ||
844 | case SSL_TLSEXT_ERR_NOACK: | |
845 | s->servername_done = 0; | |
846 | return 1; | |
847 | ||
848 | default: | |
849 | return 1; | |
850 | } | |
851 | } | |
852 | ||
332eb390 | 853 | #ifndef OPENSSL_NO_EC |
1266eefd | 854 | static int final_ec_pt_formats(SSL *s, unsigned int context, int sent, |
332eb390 MC |
855 | int *al) |
856 | { | |
857 | unsigned long alg_k, alg_a; | |
858 | ||
859 | if (s->server) | |
860 | return 1; | |
861 | ||
862 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
863 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
864 | ||
865 | /* | |
866 | * If we are client and using an elliptic curve cryptography cipher | |
867 | * suite, then if server returns an EC point formats lists extension it | |
868 | * must contain uncompressed. | |
869 | */ | |
aff8c126 RS |
870 | if (s->ext.ecpointformats != NULL |
871 | && s->ext.ecpointformats_len > 0 | |
872 | && s->session->ext.ecpointformats != NULL | |
873 | && s->session->ext.ecpointformats_len > 0 | |
1266eefd | 874 | && ((alg_k & SSL_kECDHE) || (alg_a & SSL_aECDSA))) { |
332eb390 MC |
875 | /* we are using an ECC cipher */ |
876 | size_t i; | |
aff8c126 | 877 | unsigned char *list = s->session->ext.ecpointformats; |
1266eefd | 878 | |
aff8c126 | 879 | for (i = 0; i < s->session->ext.ecpointformats_len; i++) { |
1266eefd | 880 | if (*list++ == TLSEXT_ECPOINTFORMAT_uncompressed) |
332eb390 | 881 | break; |
332eb390 | 882 | } |
aff8c126 | 883 | if (i == s->session->ext.ecpointformats_len) { |
7fe97c07 | 884 | SSLerr(SSL_F_FINAL_EC_PT_FORMATS, |
332eb390 MC |
885 | SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST); |
886 | return 0; | |
887 | } | |
888 | } | |
889 | ||
890 | return 1; | |
891 | } | |
892 | #endif | |
893 | ||
1266eefd | 894 | static int init_session_ticket(SSL *s, unsigned int context) |
332eb390 MC |
895 | { |
896 | if (!s->server) | |
aff8c126 | 897 | s->ext.ticket_expected = 0; |
332eb390 MC |
898 | |
899 | return 1; | |
900 | } | |
901 | ||
8f8c11d8 | 902 | #ifndef OPENSSL_NO_OCSP |
1266eefd | 903 | static int init_status_request(SSL *s, unsigned int context) |
805a2e9e | 904 | { |
f63e4288 | 905 | if (s->server) { |
aff8c126 | 906 | s->ext.status_type = TLSEXT_STATUSTYPE_nothing; |
f63e4288 MC |
907 | } else { |
908 | /* | |
909 | * Ensure we get sensible values passed to tlsext_status_cb in the event | |
910 | * that we don't receive a status message | |
911 | */ | |
8cbfcc70 RS |
912 | OPENSSL_free(s->ext.ocsp.resp); |
913 | s->ext.ocsp.resp = NULL; | |
914 | s->ext.ocsp.resp_len = 0; | |
f63e4288 | 915 | } |
332eb390 MC |
916 | |
917 | return 1; | |
918 | } | |
8f8c11d8 | 919 | #endif |
332eb390 | 920 | |
805a2e9e | 921 | #ifndef OPENSSL_NO_NEXTPROTONEG |
1266eefd | 922 | static int init_npn(SSL *s, unsigned int context) |
805a2e9e | 923 | { |
aff8c126 | 924 | s->s3->npn_seen = 0; |
805a2e9e MC |
925 | |
926 | return 1; | |
927 | } | |
928 | #endif | |
929 | ||
1266eefd | 930 | static int init_alpn(SSL *s, unsigned int context) |
805a2e9e | 931 | { |
332eb390 MC |
932 | OPENSSL_free(s->s3->alpn_selected); |
933 | s->s3->alpn_selected = NULL; | |
a5bb1aa1 | 934 | s->s3->alpn_selected_len = 0; |
805a2e9e | 935 | if (s->server) { |
805a2e9e MC |
936 | OPENSSL_free(s->s3->alpn_proposed); |
937 | s->s3->alpn_proposed = NULL; | |
938 | s->s3->alpn_proposed_len = 0; | |
939 | } | |
805a2e9e MC |
940 | return 1; |
941 | } | |
942 | ||
1266eefd | 943 | static int init_sig_algs(SSL *s, unsigned int context) |
805a2e9e MC |
944 | { |
945 | /* Clear any signature algorithms extension received */ | |
946 | OPENSSL_free(s->s3->tmp.peer_sigalgs); | |
947 | s->s3->tmp.peer_sigalgs = NULL; | |
948 | ||
949 | return 1; | |
950 | } | |
951 | ||
952 | #ifndef OPENSSL_NO_SRP | |
1266eefd | 953 | static int init_srp(SSL *s, unsigned int context) |
805a2e9e MC |
954 | { |
955 | OPENSSL_free(s->srp_ctx.login); | |
956 | s->srp_ctx.login = NULL; | |
957 | ||
958 | return 1; | |
959 | } | |
960 | #endif | |
961 | ||
1266eefd | 962 | static int init_etm(SSL *s, unsigned int context) |
805a2e9e | 963 | { |
28a31a0a | 964 | s->ext.use_etm = 0; |
332eb390 MC |
965 | |
966 | return 1; | |
967 | } | |
968 | ||
1266eefd | 969 | static int init_ems(SSL *s, unsigned int context) |
332eb390 MC |
970 | { |
971 | if (!s->server) | |
972 | s->s3->flags &= ~TLS1_FLAGS_RECEIVED_EXTMS; | |
973 | ||
974 | return 1; | |
975 | } | |
976 | ||
1266eefd | 977 | static int final_ems(SSL *s, unsigned int context, int sent, int *al) |
332eb390 MC |
978 | { |
979 | if (!s->server && s->hit) { | |
980 | /* | |
981 | * Check extended master secret extension is consistent with | |
982 | * original session. | |
983 | */ | |
984 | if (!(s->s3->flags & TLS1_FLAGS_RECEIVED_EXTMS) != | |
985 | !(s->session->flags & SSL_SESS_FLAG_EXTMS)) { | |
986 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
7fe97c07 | 987 | SSLerr(SSL_F_FINAL_EMS, SSL_R_INCONSISTENT_EXTMS); |
332eb390 MC |
988 | return 0; |
989 | } | |
990 | } | |
805a2e9e MC |
991 | |
992 | return 1; | |
993 | } | |
994 | ||
45615c5f DSH |
995 | static int init_certificate_authorities(SSL *s, unsigned int context) |
996 | { | |
fa7c2637 DSH |
997 | sk_X509_NAME_pop_free(s->s3->tmp.peer_ca_names, X509_NAME_free); |
998 | s->s3->tmp.peer_ca_names = NULL; | |
45615c5f DSH |
999 | return 1; |
1000 | } | |
1001 | ||
b186a592 MC |
1002 | static EXT_RETURN tls_construct_certificate_authorities(SSL *s, WPACKET *pkt, |
1003 | unsigned int context, | |
1004 | X509 *x, | |
1005 | size_t chainidx, | |
1006 | int *al) | |
45615c5f | 1007 | { |
9784ec04 | 1008 | const STACK_OF(X509_NAME) *ca_sk = SSL_get0_CA_list(s); |
45615c5f DSH |
1009 | |
1010 | if (ca_sk == NULL || sk_X509_NAME_num(ca_sk) == 0) | |
b186a592 | 1011 | return EXT_RETURN_NOT_SENT; |
45615c5f DSH |
1012 | |
1013 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_certificate_authorities) | |
1014 | || !WPACKET_start_sub_packet_u16(pkt) | |
1015 | || !construct_ca_names(s, pkt) | |
1016 | || !WPACKET_close(pkt)) { | |
1017 | SSLerr(SSL_F_TLS_CONSTRUCT_CERTIFICATE_AUTHORITIES, | |
1018 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 1019 | return EXT_RETURN_FAIL; |
45615c5f DSH |
1020 | } |
1021 | ||
b186a592 | 1022 | return EXT_RETURN_SENT; |
45615c5f DSH |
1023 | } |
1024 | ||
1025 | static int tls_parse_certificate_authorities(SSL *s, PACKET *pkt, | |
1026 | unsigned int context, X509 *x, | |
1027 | size_t chainidx, int *al) | |
1028 | { | |
1029 | if (!parse_ca_names(s, pkt, al)) | |
1030 | return 0; | |
1031 | if (PACKET_remaining(pkt) != 0) { | |
1032 | *al = SSL_AD_DECODE_ERROR; | |
1033 | return 0; | |
1034 | } | |
1035 | return 1; | |
1036 | } | |
1037 | ||
805a2e9e | 1038 | #ifndef OPENSSL_NO_SRTP |
1266eefd | 1039 | static int init_srtp(SSL *s, unsigned int context) |
805a2e9e MC |
1040 | { |
1041 | if (s->server) | |
1042 | s->srtp_profile = NULL; | |
1043 | ||
1044 | return 1; | |
1045 | } | |
1046 | #endif | |
04904312 MC |
1047 | |
1048 | static int final_sig_algs(SSL *s, unsigned int context, int sent, int *al) | |
1049 | { | |
108d45df | 1050 | if (!sent && SSL_IS_TLS13(s) && !s->hit) { |
04904312 MC |
1051 | *al = TLS13_AD_MISSING_EXTENSION; |
1052 | SSLerr(SSL_F_FINAL_SIG_ALGS, SSL_R_MISSING_SIGALGS_EXTENSION); | |
1053 | return 0; | |
1054 | } | |
1055 | ||
1056 | return 1; | |
1057 | } | |
b2f7e8c0 | 1058 | |
deb2d5e7 | 1059 | #ifndef OPENSSL_NO_EC |
f4bbb37c MC |
1060 | static int final_key_share(SSL *s, unsigned int context, int sent, int *al) |
1061 | { | |
1062 | if (!SSL_IS_TLS13(s)) | |
1063 | return 1; | |
1064 | ||
07d447a6 MC |
1065 | /* Nothing to do for key_share in an HRR */ |
1066 | if ((context & SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST) != 0) | |
1067 | return 1; | |
1068 | ||
f4bbb37c MC |
1069 | /* |
1070 | * If | |
aff9929b MC |
1071 | * we are a client |
1072 | * AND | |
f4bbb37c MC |
1073 | * we have no key_share |
1074 | * AND | |
1075 | * (we are not resuming | |
1076 | * OR the kex_mode doesn't allow non key_share resumes) | |
1077 | * THEN | |
aff9929b | 1078 | * fail; |
f4bbb37c | 1079 | */ |
aff9929b MC |
1080 | if (!s->server |
1081 | && !sent | |
f4bbb37c MC |
1082 | && (!s->hit |
1083 | || (s->ext.psk_kex_mode & TLSEXT_KEX_MODE_FLAG_KE) == 0)) { | |
7d061fce | 1084 | /* Nothing left we can do - just fail */ |
fb34a0f4 | 1085 | *al = SSL_AD_MISSING_EXTENSION; |
f4bbb37c MC |
1086 | SSLerr(SSL_F_FINAL_KEY_SHARE, SSL_R_NO_SUITABLE_KEY_SHARE); |
1087 | return 0; | |
1088 | } | |
aff9929b MC |
1089 | /* |
1090 | * If | |
1091 | * we are a server | |
1092 | * AND | |
1093 | * we have no key_share | |
1094 | * THEN | |
1095 | * If | |
1096 | * we didn't already send a HelloRetryRequest | |
1097 | * AND | |
1098 | * the client sent a key_share extension | |
1099 | * AND | |
1100 | * (we are not resuming | |
1101 | * OR the kex_mode allows key_share resumes) | |
1102 | * AND | |
1103 | * a shared group exists | |
1104 | * THEN | |
1105 | * send a HelloRetryRequest | |
1106 | * ELSE If | |
1107 | * we are not resuming | |
1108 | * OR | |
1109 | * the kex_mode doesn't allow non key_share resumes | |
1110 | * THEN | |
1111 | * fail; | |
1112 | */ | |
1113 | if (s->server && s->s3->peer_tmp == NULL) { | |
1114 | /* No suitable share */ | |
1115 | if (s->hello_retry_request == 0 && sent | |
1116 | && (!s->hit | |
1117 | || (s->ext.psk_kex_mode & TLSEXT_KEX_MODE_FLAG_KE_DHE) | |
1118 | != 0)) { | |
1119 | const unsigned char *pcurves, *pcurvestmp, *clntcurves; | |
1120 | size_t num_curves, clnt_num_curves, i; | |
319a33d0 | 1121 | unsigned int group_id = 0; |
aff9929b | 1122 | |
2248dbeb | 1123 | /* Check if a shared group exists */ |
aff9929b MC |
1124 | |
1125 | /* Get the clients list of supported groups. */ | |
1126 | if (!tls1_get_curvelist(s, 1, &clntcurves, &clnt_num_curves)) { | |
1127 | *al = SSL_AD_INTERNAL_ERROR; | |
1128 | SSLerr(SSL_F_FINAL_KEY_SHARE, ERR_R_INTERNAL_ERROR); | |
1129 | return 0; | |
1130 | } | |
1131 | ||
1132 | /* Get our list of available groups */ | |
1133 | if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) { | |
1134 | *al = SSL_AD_INTERNAL_ERROR; | |
1135 | SSLerr(SSL_F_FINAL_KEY_SHARE, ERR_R_INTERNAL_ERROR); | |
1136 | return 0; | |
1137 | } | |
1138 | ||
1139 | /* Find the first group we allow that is also in client's list */ | |
1140 | for (i = 0, pcurvestmp = pcurves; i < num_curves; | |
1141 | i++, pcurvestmp += 2) { | |
0dd7ba24 | 1142 | group_id = bytestogroup(pcurvestmp); |
aff9929b MC |
1143 | |
1144 | if (check_in_list(s, group_id, clntcurves, clnt_num_curves, 1)) | |
1145 | break; | |
1146 | } | |
1147 | ||
1148 | if (i < num_curves) { | |
1149 | /* A shared group exists so send a HelloRetryRequest */ | |
1150 | s->s3->group_id = group_id; | |
1151 | s->hello_retry_request = 1; | |
1152 | return 1; | |
1153 | } | |
1154 | } | |
1155 | if (!s->hit | |
1156 | || (s->ext.psk_kex_mode & TLSEXT_KEX_MODE_FLAG_KE) == 0) { | |
1157 | /* Nothing left we can do - just fail */ | |
b6fdc12d MC |
1158 | if (!sent) |
1159 | *al = SSL_AD_MISSING_EXTENSION; | |
1160 | else | |
1161 | *al = SSL_AD_HANDSHAKE_FAILURE; | |
aff9929b MC |
1162 | SSLerr(SSL_F_FINAL_KEY_SHARE, SSL_R_NO_SUITABLE_KEY_SHARE); |
1163 | return 0; | |
1164 | } | |
1165 | } | |
1166 | ||
1167 | /* We have a key_share so don't send any more HelloRetryRequest messages */ | |
1168 | if (s->server) | |
1169 | s->hello_retry_request = 0; | |
f4bbb37c MC |
1170 | |
1171 | /* | |
1172 | * For a client side resumption with no key_share we need to generate | |
1173 | * the handshake secret (otherwise this is done during key_share | |
1174 | * processing). | |
1175 | */ | |
1176 | if (!sent && !s->server && !tls13_generate_handshake_secret(s, NULL, 0)) { | |
1177 | *al = SSL_AD_INTERNAL_ERROR; | |
1178 | SSLerr(SSL_F_FINAL_KEY_SHARE, ERR_R_INTERNAL_ERROR); | |
1179 | return 0; | |
1180 | } | |
1181 | ||
1182 | return 1; | |
1183 | } | |
deb2d5e7 | 1184 | #endif |
f4bbb37c | 1185 | |
b2f7e8c0 MC |
1186 | static int init_psk_kex_modes(SSL *s, unsigned int context) |
1187 | { | |
1188 | s->ext.psk_kex_mode = TLSEXT_KEX_MODE_FLAG_NONE; | |
b2f7e8c0 MC |
1189 | return 1; |
1190 | } | |
1053a6e2 MC |
1191 | |
1192 | int tls_psk_do_binder(SSL *s, const EVP_MD *md, const unsigned char *msgstart, | |
1193 | size_t binderoffset, const unsigned char *binderin, | |
3a7c56b2 MC |
1194 | unsigned char *binderout, SSL_SESSION *sess, int sign, |
1195 | int external) | |
1053a6e2 MC |
1196 | { |
1197 | EVP_PKEY *mackey = NULL; | |
1198 | EVP_MD_CTX *mctx = NULL; | |
1199 | unsigned char hash[EVP_MAX_MD_SIZE], binderkey[EVP_MAX_MD_SIZE]; | |
1200 | unsigned char finishedkey[EVP_MAX_MD_SIZE], tmpbinder[EVP_MAX_MD_SIZE]; | |
b81bd336 MC |
1201 | unsigned char tmppsk[EVP_MAX_MD_SIZE]; |
1202 | unsigned char *early_secret, *psk; | |
17aa119e | 1203 | const char resumption_label[] = "res binder"; |
3a7c56b2 | 1204 | const char external_label[] = "ext binder"; |
b81bd336 | 1205 | const char nonce_label[] = "resumption"; |
3a7c56b2 MC |
1206 | const char *label; |
1207 | size_t bindersize, labelsize, hashsize = EVP_MD_size(md); | |
1053a6e2 MC |
1208 | int ret = -1; |
1209 | ||
3a7c56b2 MC |
1210 | if (external) { |
1211 | label = external_label; | |
1212 | labelsize = sizeof(external_label) - 1; | |
1213 | } else { | |
1214 | label = resumption_label; | |
1215 | labelsize = sizeof(resumption_label) - 1; | |
1216 | } | |
1217 | ||
b81bd336 MC |
1218 | if (sess->master_key_length != hashsize) { |
1219 | SSLerr(SSL_F_TLS_PSK_DO_BINDER, SSL_R_BAD_PSK); | |
1220 | goto err; | |
1221 | } | |
1222 | ||
1223 | if (external) { | |
1224 | psk = sess->master_key; | |
1225 | } else { | |
b81bd336 MC |
1226 | psk = tmppsk; |
1227 | if (!tls13_hkdf_expand(s, md, sess->master_key, | |
1228 | (const unsigned char *)nonce_label, | |
1229 | sizeof(nonce_label) - 1, sess->ext.tick_nonce, | |
1230 | sess->ext.tick_nonce_len, psk, hashsize)) { | |
1231 | SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR); | |
1232 | goto err; | |
1233 | } | |
1234 | } | |
1235 | ||
9368f865 MC |
1236 | /* |
1237 | * Generate the early_secret. On the server side we've selected a PSK to | |
1238 | * resume with (internal or external) so we always do this. On the client | |
1239 | * side we do this for a non-external (i.e. resumption) PSK so that it | |
1240 | * is in place for sending early data. For client side external PSK we | |
1241 | * generate it but store it away for later use. | |
1242 | */ | |
1243 | if (s->server || !external) | |
1244 | early_secret = (unsigned char *)s->early_secret; | |
1245 | else | |
1246 | early_secret = (unsigned char *)sess->early_secret; | |
b81bd336 | 1247 | if (!tls13_generate_secret(s, md, NULL, psk, hashsize, early_secret)) { |
1053a6e2 MC |
1248 | SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR); |
1249 | goto err; | |
1250 | } | |
1251 | ||
1252 | /* | |
1253 | * Create the handshake hash for the binder key...the messages so far are | |
1254 | * empty! | |
1255 | */ | |
1256 | mctx = EVP_MD_CTX_new(); | |
1257 | if (mctx == NULL | |
1258 | || EVP_DigestInit_ex(mctx, md, NULL) <= 0 | |
1259 | || EVP_DigestFinal_ex(mctx, hash, NULL) <= 0) { | |
1260 | SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR); | |
1261 | goto err; | |
1262 | } | |
1263 | ||
1264 | /* Generate the binder key */ | |
9368f865 | 1265 | if (!tls13_hkdf_expand(s, md, early_secret, (unsigned char *)label, |
a19ae67d | 1266 | labelsize, hash, hashsize, binderkey, hashsize)) { |
1053a6e2 MC |
1267 | SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR); |
1268 | goto err; | |
1269 | } | |
1270 | ||
1271 | /* Generate the finished key */ | |
1272 | if (!tls13_derive_finishedkey(s, md, binderkey, finishedkey, hashsize)) { | |
1273 | SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR); | |
1274 | goto err; | |
1275 | } | |
1276 | ||
aff9929b MC |
1277 | if (EVP_DigestInit_ex(mctx, md, NULL) <= 0) { |
1278 | SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR); | |
1279 | goto err; | |
1280 | } | |
1281 | ||
1053a6e2 | 1282 | /* |
aff9929b MC |
1283 | * Get a hash of the ClientHello up to the start of the binders. If we are |
1284 | * following a HelloRetryRequest then this includes the hash of the first | |
1285 | * ClientHello and the HelloRetryRequest itself. | |
1053a6e2 | 1286 | */ |
aff9929b MC |
1287 | if (s->hello_retry_request) { |
1288 | size_t hdatalen; | |
1289 | void *hdata; | |
1290 | ||
1291 | hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata); | |
1292 | if (hdatalen <= 0) { | |
1293 | SSLerr(SSL_F_TLS_PSK_DO_BINDER, SSL_R_BAD_HANDSHAKE_LENGTH); | |
1294 | goto err; | |
1295 | } | |
1296 | ||
1297 | /* | |
1298 | * For servers the handshake buffer data will include the second | |
1299 | * ClientHello - which we don't want - so we need to take that bit off. | |
1300 | */ | |
1301 | if (s->server) { | |
77815a02 MC |
1302 | PACKET hashprefix, msg; |
1303 | ||
1304 | /* Find how many bytes are left after the first two messages */ | |
1305 | if (!PACKET_buf_init(&hashprefix, hdata, hdatalen) | |
1306 | || !PACKET_forward(&hashprefix, 1) | |
1307 | || !PACKET_get_length_prefixed_3(&hashprefix, &msg) | |
1308 | || !PACKET_forward(&hashprefix, 1) | |
1309 | || !PACKET_get_length_prefixed_3(&hashprefix, &msg)) { | |
aff9929b MC |
1310 | SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR); |
1311 | goto err; | |
1312 | } | |
77815a02 | 1313 | hdatalen -= PACKET_remaining(&hashprefix); |
aff9929b MC |
1314 | } |
1315 | ||
1316 | if (EVP_DigestUpdate(mctx, hdata, hdatalen) <= 0) { | |
1317 | SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR); | |
1318 | goto err; | |
1319 | } | |
1320 | } | |
1321 | ||
1322 | if (EVP_DigestUpdate(mctx, msgstart, binderoffset) <= 0 | |
1053a6e2 MC |
1323 | || EVP_DigestFinal_ex(mctx, hash, NULL) <= 0) { |
1324 | SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR); | |
1325 | goto err; | |
1326 | } | |
1327 | ||
1328 | mackey = EVP_PKEY_new_mac_key(EVP_PKEY_HMAC, NULL, finishedkey, hashsize); | |
1329 | if (mackey == NULL) { | |
1330 | SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR); | |
1331 | goto err; | |
1332 | } | |
1333 | ||
1334 | if (!sign) | |
1335 | binderout = tmpbinder; | |
1336 | ||
1337 | bindersize = hashsize; | |
1338 | if (EVP_DigestSignInit(mctx, NULL, md, NULL, mackey) <= 0 | |
1339 | || EVP_DigestSignUpdate(mctx, hash, hashsize) <= 0 | |
1340 | || EVP_DigestSignFinal(mctx, binderout, &bindersize) <= 0 | |
1341 | || bindersize != hashsize) { | |
1342 | SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR); | |
1343 | goto err; | |
1344 | } | |
1345 | ||
1346 | if (sign) { | |
1347 | ret = 1; | |
1348 | } else { | |
1349 | /* HMAC keys can't do EVP_DigestVerify* - use CRYPTO_memcmp instead */ | |
1350 | ret = (CRYPTO_memcmp(binderin, binderout, hashsize) == 0); | |
1351 | } | |
1352 | ||
1353 | err: | |
1354 | OPENSSL_cleanse(binderkey, sizeof(binderkey)); | |
1355 | OPENSSL_cleanse(finishedkey, sizeof(finishedkey)); | |
1356 | EVP_PKEY_free(mackey); | |
1357 | EVP_MD_CTX_free(mctx); | |
1358 | ||
1359 | return ret; | |
1360 | } | |
38df5a45 MC |
1361 | |
1362 | static int final_early_data(SSL *s, unsigned int context, int sent, int *al) | |
1363 | { | |
1364 | if (!s->server || !sent) | |
1365 | return 1; | |
1366 | ||
1367 | if (s->max_early_data == 0 | |
1368 | || !s->hit | |
1369 | || s->session->ext.tick_identity != 0 | |
1370 | || s->early_data_state != SSL_EARLY_DATA_ACCEPTING | |
1371 | || !s->ext.early_data_ok | |
f6370040 MC |
1372 | || s->hello_retry_request |
1373 | || s->s3->alpn_selected_len != s->session->ext.alpn_selected_len | |
e6941c78 MC |
1374 | || (s->s3->alpn_selected_len > 0 |
1375 | && memcmp(s->s3->alpn_selected, s->session->ext.alpn_selected, | |
1376 | s->s3->alpn_selected_len) != 0)) { | |
38df5a45 MC |
1377 | s->ext.early_data = SSL_EARLY_DATA_REJECTED; |
1378 | } else { | |
1379 | s->ext.early_data = SSL_EARLY_DATA_ACCEPTED; | |
1380 | ||
1381 | if (!tls13_change_cipher_state(s, | |
1382 | SSL3_CC_EARLY | SSL3_CHANGE_CIPHER_SERVER_READ)) { | |
1383 | *al = SSL_AD_INTERNAL_ERROR; | |
1384 | return 0; | |
1385 | } | |
1386 | } | |
1387 | ||
1388 | return 1; | |
1389 | } |