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6b473aca | 1 | /* |
fecb3aae | 2 | * Copyright 2016-2022 The OpenSSL Project Authors. All Rights Reserved. |
6b473aca | 3 | * |
2c18d164 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
6b473aca MC |
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 | ||
650c6687 RB |
10 | #if defined(__TANDEM) && defined(_SPT_MODEL_) |
11 | # include <spthread.h> | |
12 | # include <spt_extensions.h> /* timeval */ | |
13 | #endif | |
14 | ||
f6370040 | 15 | #include <string.h> |
677963e5 | 16 | #include "internal/nelem.h" |
88050dd1 | 17 | #include "internal/cryptlib.h" |
706457b7 DMSP |
18 | #include "../ssl_local.h" |
19 | #include "statem_local.h" | |
6b473aca | 20 | |
38b051a1 TM |
21 | static int final_renegotiate(SSL_CONNECTION *s, unsigned int context, int sent); |
22 | static int init_server_name(SSL_CONNECTION *s, unsigned int context); | |
23 | static int final_server_name(SSL_CONNECTION *s, unsigned int context, int sent); | |
24 | static int final_ec_pt_formats(SSL_CONNECTION *s, unsigned int context, | |
25 | int sent); | |
26 | static int init_session_ticket(SSL_CONNECTION *s, unsigned int context); | |
8f8c11d8 | 27 | #ifndef OPENSSL_NO_OCSP |
38b051a1 | 28 | static int init_status_request(SSL_CONNECTION *s, unsigned int context); |
8f8c11d8 | 29 | #endif |
805a2e9e | 30 | #ifndef OPENSSL_NO_NEXTPROTONEG |
38b051a1 | 31 | static int init_npn(SSL_CONNECTION *s, unsigned int context); |
805a2e9e | 32 | #endif |
38b051a1 TM |
33 | static int init_alpn(SSL_CONNECTION *s, unsigned int context); |
34 | static int final_alpn(SSL_CONNECTION *s, unsigned int context, int sent); | |
35 | static int init_sig_algs_cert(SSL_CONNECTION *s, unsigned int context); | |
36 | static int init_sig_algs(SSL_CONNECTION *s, unsigned int context); | |
37 | static int init_certificate_authorities(SSL_CONNECTION *s, | |
38 | unsigned int context); | |
39 | static EXT_RETURN tls_construct_certificate_authorities(SSL_CONNECTION *s, | |
40 | WPACKET *pkt, | |
b186a592 MC |
41 | unsigned int context, |
42 | X509 *x, | |
f63a17d6 | 43 | size_t chainidx); |
38b051a1 | 44 | static int tls_parse_certificate_authorities(SSL_CONNECTION *s, PACKET *pkt, |
45615c5f | 45 | unsigned int context, X509 *x, |
f63a17d6 | 46 | size_t chainidx); |
805a2e9e | 47 | #ifndef OPENSSL_NO_SRP |
38b051a1 | 48 | static int init_srp(SSL_CONNECTION *s, unsigned int context); |
805a2e9e | 49 | #endif |
38b051a1 TM |
50 | static int init_ec_point_formats(SSL_CONNECTION *s, unsigned int context); |
51 | static int init_etm(SSL_CONNECTION *s, unsigned int context); | |
52 | static int init_ems(SSL_CONNECTION *s, unsigned int context); | |
53 | static int final_ems(SSL_CONNECTION *s, unsigned int context, int sent); | |
54 | static int init_psk_kex_modes(SSL_CONNECTION *s, unsigned int context); | |
55 | static int final_key_share(SSL_CONNECTION *s, unsigned int context, int sent); | |
805a2e9e | 56 | #ifndef OPENSSL_NO_SRTP |
38b051a1 | 57 | static int init_srtp(SSL_CONNECTION *s, unsigned int context); |
805a2e9e | 58 | #endif |
38b051a1 TM |
59 | static int final_sig_algs(SSL_CONNECTION *s, unsigned int context, int sent); |
60 | static int final_early_data(SSL_CONNECTION *s, unsigned int context, int sent); | |
61 | static int final_maxfragmentlen(SSL_CONNECTION *s, unsigned int context, | |
62 | int sent); | |
63 | static int init_post_handshake_auth(SSL_CONNECTION *s, unsigned int context); | |
64 | static int final_psk(SSL_CONNECTION *s, unsigned int context, int sent); | |
9d75dce3 | 65 | |
70af3d8e | 66 | /* Structure to define a built-in extension */ |
1266eefd MC |
67 | typedef struct extensions_definition_st { |
68 | /* The defined type for the extension */ | |
6b473aca | 69 | unsigned int type; |
1266eefd MC |
70 | /* |
71 | * The context that this extension applies to, e.g. what messages and | |
72 | * protocol versions | |
73 | */ | |
74 | unsigned int context; | |
68db4dda | 75 | /* |
805a2e9e MC |
76 | * Initialise extension before parsing. Always called for relevant contexts |
77 | * even if extension not present | |
68db4dda | 78 | */ |
38b051a1 | 79 | int (*init)(SSL_CONNECTION *s, unsigned int context); |
1266eefd | 80 | /* Parse extension sent from client to server */ |
38b051a1 TM |
81 | int (*parse_ctos)(SSL_CONNECTION *s, PACKET *pkt, unsigned int context, |
82 | X509 *x, size_t chainidx); | |
1266eefd | 83 | /* Parse extension send from server to client */ |
38b051a1 TM |
84 | int (*parse_stoc)(SSL_CONNECTION *s, PACKET *pkt, unsigned int context, |
85 | X509 *x, size_t chainidx); | |
1266eefd | 86 | /* Construct extension sent from server to client */ |
38b051a1 TM |
87 | EXT_RETURN (*construct_stoc)(SSL_CONNECTION *s, WPACKET *pkt, |
88 | unsigned int context, | |
f63a17d6 | 89 | X509 *x, size_t chainidx); |
1266eefd | 90 | /* Construct extension sent from client to server */ |
38b051a1 TM |
91 | EXT_RETURN (*construct_ctos)(SSL_CONNECTION *s, WPACKET *pkt, |
92 | unsigned int context, | |
f63a17d6 | 93 | X509 *x, size_t chainidx); |
68db4dda | 94 | /* |
805a2e9e MC |
95 | * Finalise extension after parsing. Always called where an extensions was |
96 | * initialised even if the extension was not present. |sent| is set to 1 if | |
97 | * the extension was seen, or 0 otherwise. | |
68db4dda | 98 | */ |
38b051a1 | 99 | int (*final)(SSL_CONNECTION *s, unsigned int context, int sent); |
6b473aca MC |
100 | } EXTENSION_DEFINITION; |
101 | ||
4b299b8e | 102 | /* |
70af3d8e | 103 | * Definitions of all built-in extensions. NOTE: Changes in the number or order |
bd91e3c8 | 104 | * of these extensions should be mirrored with equivalent changes to the |
706457b7 | 105 | * indexes ( TLSEXT_IDX_* ) defined in ssl_local.h. |
ac44deaf TS |
106 | * Extensions should be added to test/ext_internal_test.c as well, as that |
107 | * tests the ordering of the extensions. | |
108 | * | |
70af3d8e MC |
109 | * Each extension has an initialiser, a client and |
110 | * server side parser and a finaliser. The initialiser is called (if the | |
111 | * extension is relevant to the given context) even if we did not see the | |
112 | * extension in the message that we received. The parser functions are only | |
113 | * called if we see the extension in the message. The finalisers are always | |
114 | * called if the initialiser was called. | |
115 | * There are also server and client side constructor functions which are always | |
116 | * called during message construction if the extension is relevant for the | |
117 | * given context. | |
118 | * The initialisation, parsing, finalisation and construction functions are | |
119 | * always called in the order defined in this list. Some extensions may depend | |
120 | * on others having been processed first, so the order of this list is | |
121 | * significant. | |
122 | * The extension context is defined by a series of flags which specify which | |
123 | * messages the extension is relevant to. These flags also specify whether the | |
3e6c1da8 | 124 | * extension is relevant to a particular protocol or protocol version. |
a1448c26 | 125 | * |
10ed1b72 TS |
126 | * NOTE: WebSphere Application Server 7+ cannot handle empty extensions at |
127 | * the end, keep these extensions before signature_algorithm. | |
4b299b8e | 128 | */ |
ac44deaf | 129 | #define INVALID_EXTENSION { TLSEXT_TYPE_invalid, 0, NULL, NULL, NULL, NULL, NULL, NULL } |
6b473aca MC |
130 | static const EXTENSION_DEFINITION ext_defs[] = { |
131 | { | |
132 | TLSEXT_TYPE_renegotiate, | |
fe874d27 MC |
133 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO |
134 | | SSL_EXT_SSL3_ALLOWED | SSL_EXT_TLS1_2_AND_BELOW_ONLY, | |
1266eefd MC |
135 | NULL, tls_parse_ctos_renegotiate, tls_parse_stoc_renegotiate, |
136 | tls_construct_stoc_renegotiate, tls_construct_ctos_renegotiate, | |
137 | final_renegotiate | |
6b473aca MC |
138 | }, |
139 | { | |
140 | TLSEXT_TYPE_server_name, | |
fe874d27 MC |
141 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO |
142 | | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, | |
1266eefd MC |
143 | init_server_name, |
144 | tls_parse_ctos_server_name, tls_parse_stoc_server_name, | |
145 | tls_construct_stoc_server_name, tls_construct_ctos_server_name, | |
146 | final_server_name | |
6b473aca | 147 | }, |
cf72c757 F |
148 | { |
149 | TLSEXT_TYPE_max_fragment_length, | |
150 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO | |
151 | | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, | |
152 | NULL, tls_parse_ctos_maxfragmentlen, tls_parse_stoc_maxfragmentlen, | |
153 | tls_construct_stoc_maxfragmentlen, tls_construct_ctos_maxfragmentlen, | |
154 | final_maxfragmentlen | |
155 | }, | |
6b473aca MC |
156 | #ifndef OPENSSL_NO_SRP |
157 | { | |
158 | TLSEXT_TYPE_srp, | |
fe874d27 | 159 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_AND_BELOW_ONLY, |
1266eefd | 160 | init_srp, tls_parse_ctos_srp, NULL, NULL, tls_construct_ctos_srp, NULL |
6b473aca | 161 | }, |
0785274c MC |
162 | #else |
163 | INVALID_EXTENSION, | |
6b473aca | 164 | #endif |
6b473aca MC |
165 | { |
166 | TLSEXT_TYPE_ec_point_formats, | |
fe874d27 MC |
167 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO |
168 | | SSL_EXT_TLS1_2_AND_BELOW_ONLY, | |
3f987381 | 169 | init_ec_point_formats, tls_parse_ctos_ec_pt_formats, tls_parse_stoc_ec_pt_formats, |
1266eefd MC |
170 | tls_construct_stoc_ec_pt_formats, tls_construct_ctos_ec_pt_formats, |
171 | final_ec_pt_formats | |
6b473aca MC |
172 | }, |
173 | { | |
7bc2bddb BK |
174 | /* |
175 | * "supported_groups" is spread across several specifications. | |
176 | * It was originally specified as "elliptic_curves" in RFC 4492, | |
177 | * and broadened to include named FFDH groups by RFC 7919. | |
178 | * Both RFCs 4492 and 7919 do not include a provision for the server | |
179 | * to indicate to the client the complete list of groups supported | |
180 | * by the server, with the server instead just indicating the | |
181 | * selected group for this connection in the ServerKeyExchange | |
182 | * message. TLS 1.3 adds a scheme for the server to indicate | |
183 | * to the client its list of supported groups in the | |
184 | * EncryptedExtensions message, but none of the relevant | |
185 | * specifications permit sending supported_groups in the ServerHello. | |
186 | * Nonetheless (possibly due to the close proximity to the | |
187 | * "ec_point_formats" extension, which is allowed in the ServerHello), | |
188 | * there are several servers that send this extension in the | |
189 | * ServerHello anyway. Up to and including the 1.1.0 release, | |
190 | * we did not check for the presence of nonpermitted extensions, | |
191 | * so to avoid a regression, we must permit this extension in the | |
192 | * TLS 1.2 ServerHello as well. | |
193 | * | |
194 | * Note that there is no tls_parse_stoc_supported_groups function, | |
195 | * so we do not perform any additional parsing, validation, or | |
196 | * processing on the server's group list -- this is just a minimal | |
197 | * change to preserve compatibility with these misbehaving servers. | |
198 | */ | |
6b473aca | 199 | TLSEXT_TYPE_supported_groups, |
7bc2bddb BK |
200 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS |
201 | | SSL_EXT_TLS1_2_SERVER_HELLO, | |
1266eefd | 202 | NULL, tls_parse_ctos_supported_groups, NULL, |
6af87546 | 203 | tls_construct_stoc_supported_groups, |
1266eefd | 204 | tls_construct_ctos_supported_groups, NULL |
6b473aca | 205 | }, |
6b473aca MC |
206 | { |
207 | TLSEXT_TYPE_session_ticket, | |
fe874d27 MC |
208 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO |
209 | | SSL_EXT_TLS1_2_AND_BELOW_ONLY, | |
1266eefd MC |
210 | init_session_ticket, tls_parse_ctos_session_ticket, |
211 | tls_parse_stoc_session_ticket, tls_construct_stoc_session_ticket, | |
212 | tls_construct_ctos_session_ticket, NULL | |
6b473aca | 213 | }, |
ab83e314 | 214 | #ifndef OPENSSL_NO_OCSP |
6b473aca MC |
215 | { |
216 | TLSEXT_TYPE_status_request, | |
fe874d27 | 217 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO |
5de683d2 | 218 | | SSL_EXT_TLS1_3_CERTIFICATE | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, |
1266eefd MC |
219 | init_status_request, tls_parse_ctos_status_request, |
220 | tls_parse_stoc_status_request, tls_construct_stoc_status_request, | |
f63e4288 | 221 | tls_construct_ctos_status_request, NULL |
6b473aca | 222 | }, |
0785274c MC |
223 | #else |
224 | INVALID_EXTENSION, | |
ab83e314 | 225 | #endif |
6b473aca MC |
226 | #ifndef OPENSSL_NO_NEXTPROTONEG |
227 | { | |
228 | TLSEXT_TYPE_next_proto_neg, | |
fe874d27 MC |
229 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO |
230 | | SSL_EXT_TLS1_2_AND_BELOW_ONLY, | |
1266eefd MC |
231 | init_npn, tls_parse_ctos_npn, tls_parse_stoc_npn, |
232 | tls_construct_stoc_next_proto_neg, tls_construct_ctos_npn, NULL | |
6b473aca | 233 | }, |
0785274c MC |
234 | #else |
235 | INVALID_EXTENSION, | |
6b473aca MC |
236 | #endif |
237 | { | |
02f0274e MC |
238 | /* |
239 | * Must appear in this list after server_name so that finalisation | |
240 | * happens after server_name callbacks | |
241 | */ | |
6b473aca | 242 | TLSEXT_TYPE_application_layer_protocol_negotiation, |
fe874d27 MC |
243 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO |
244 | | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, | |
1266eefd | 245 | init_alpn, tls_parse_ctos_alpn, tls_parse_stoc_alpn, |
630369d9 | 246 | tls_construct_stoc_alpn, tls_construct_ctos_alpn, final_alpn |
6b473aca | 247 | }, |
7da160b0 | 248 | #ifndef OPENSSL_NO_SRTP |
6b473aca MC |
249 | { |
250 | TLSEXT_TYPE_use_srtp, | |
fe874d27 MC |
251 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO |
252 | | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS | SSL_EXT_DTLS_ONLY, | |
1266eefd MC |
253 | init_srtp, tls_parse_ctos_use_srtp, tls_parse_stoc_use_srtp, |
254 | tls_construct_stoc_use_srtp, tls_construct_ctos_use_srtp, NULL | |
6b473aca | 255 | }, |
0785274c MC |
256 | #else |
257 | INVALID_EXTENSION, | |
7da160b0 | 258 | #endif |
6b473aca MC |
259 | { |
260 | TLSEXT_TYPE_encrypt_then_mac, | |
fe874d27 MC |
261 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO |
262 | | SSL_EXT_TLS1_2_AND_BELOW_ONLY, | |
1266eefd MC |
263 | init_etm, tls_parse_ctos_etm, tls_parse_stoc_etm, |
264 | tls_construct_stoc_etm, tls_construct_ctos_etm, NULL | |
6b473aca | 265 | }, |
6dd083fd | 266 | #ifndef OPENSSL_NO_CT |
6b473aca MC |
267 | { |
268 | TLSEXT_TYPE_signed_certificate_timestamp, | |
fe874d27 | 269 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO |
5de683d2 | 270 | | SSL_EXT_TLS1_3_CERTIFICATE | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, |
68db4dda | 271 | NULL, |
6b473aca MC |
272 | /* |
273 | * No server side support for this, but can be provided by a custom | |
274 | * extension. This is an exception to the rule that custom extensions | |
275 | * cannot override built in ones. | |
276 | */ | |
1266eefd | 277 | NULL, tls_parse_stoc_sct, NULL, tls_construct_ctos_sct, NULL |
6b473aca | 278 | }, |
0785274c MC |
279 | #else |
280 | INVALID_EXTENSION, | |
6dd083fd | 281 | #endif |
6b473aca MC |
282 | { |
283 | TLSEXT_TYPE_extended_master_secret, | |
fe874d27 MC |
284 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO |
285 | | SSL_EXT_TLS1_2_AND_BELOW_ONLY, | |
1266eefd MC |
286 | init_ems, tls_parse_ctos_ems, tls_parse_stoc_ems, |
287 | tls_construct_stoc_ems, tls_construct_ctos_ems, final_ems | |
6b473aca | 288 | }, |
c589c34e BK |
289 | { |
290 | TLSEXT_TYPE_signature_algorithms_cert, | |
291 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, | |
292 | init_sig_algs_cert, tls_parse_ctos_sig_algs_cert, | |
293 | tls_parse_ctos_sig_algs_cert, | |
294 | /* We do not generate signature_algorithms_cert at present. */ | |
295 | NULL, NULL, NULL | |
296 | }, | |
9d75dce3 TS |
297 | { |
298 | TLSEXT_TYPE_post_handshake_auth, | |
299 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_ONLY, | |
300 | init_post_handshake_auth, | |
301 | tls_parse_ctos_post_handshake_auth, NULL, | |
302 | NULL, tls_construct_ctos_post_handshake_auth, | |
303 | NULL, | |
304 | }, | |
10ed1b72 TS |
305 | { |
306 | TLSEXT_TYPE_signature_algorithms, | |
307 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, | |
308 | init_sig_algs, tls_parse_ctos_sig_algs, | |
309 | tls_parse_ctos_sig_algs, tls_construct_ctos_sig_algs, | |
310 | tls_construct_ctos_sig_algs, final_sig_algs | |
311 | }, | |
6b473aca MC |
312 | { |
313 | TLSEXT_TYPE_supported_versions, | |
27e462f1 MC |
314 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_SERVER_HELLO |
315 | | SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST | SSL_EXT_TLS_IMPLEMENTATION_ONLY, | |
68db4dda | 316 | NULL, |
6b473aca | 317 | /* Processed inline as part of version selection */ |
88050dd1 MC |
318 | NULL, tls_parse_stoc_supported_versions, |
319 | tls_construct_stoc_supported_versions, | |
320 | tls_construct_ctos_supported_versions, NULL | |
6b473aca | 321 | }, |
b2f7e8c0 | 322 | { |
b2f7e8c0 | 323 | TLSEXT_TYPE_psk_kex_modes, |
fe874d27 MC |
324 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS_IMPLEMENTATION_ONLY |
325 | | SSL_EXT_TLS1_3_ONLY, | |
b2f7e8c0 MC |
326 | init_psk_kex_modes, tls_parse_ctos_psk_kex_modes, NULL, NULL, |
327 | tls_construct_ctos_psk_kex_modes, NULL | |
328 | }, | |
6b473aca | 329 | { |
70af3d8e MC |
330 | /* |
331 | * Must be in this list after supported_groups. We need that to have | |
332 | * been parsed before we do this one. | |
333 | */ | |
6b473aca | 334 | TLSEXT_TYPE_key_share, |
fe874d27 MC |
335 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_SERVER_HELLO |
336 | | SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST | SSL_EXT_TLS_IMPLEMENTATION_ONLY | |
337 | | SSL_EXT_TLS1_3_ONLY, | |
1266eefd | 338 | NULL, tls_parse_ctos_key_share, tls_parse_stoc_key_share, |
f4bbb37c MC |
339 | tls_construct_stoc_key_share, tls_construct_ctos_key_share, |
340 | final_key_share | |
7da160b0 | 341 | }, |
cfef5027 | 342 | { |
97ea1e7f | 343 | /* Must be after key_share */ |
cfef5027 | 344 | TLSEXT_TYPE_cookie, |
fe874d27 MC |
345 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST |
346 | | SSL_EXT_TLS_IMPLEMENTATION_ONLY | SSL_EXT_TLS1_3_ONLY, | |
43054d3d MC |
347 | NULL, tls_parse_ctos_cookie, tls_parse_stoc_cookie, |
348 | tls_construct_stoc_cookie, tls_construct_ctos_cookie, NULL | |
cfef5027 | 349 | }, |
7da160b0 MC |
350 | { |
351 | /* | |
352 | * Special unsolicited ServerHello extension only used when | |
23fed8ba MC |
353 | * SSL_OP_CRYPTOPRO_TLSEXT_BUG is set. We allow it in a ClientHello but |
354 | * ignore it. | |
7da160b0 MC |
355 | */ |
356 | TLSEXT_TYPE_cryptopro_bug, | |
23fed8ba MC |
357 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO |
358 | | SSL_EXT_TLS1_2_AND_BELOW_ONLY, | |
1266eefd | 359 | NULL, NULL, NULL, tls_construct_stoc_cryptopro_bug, NULL, NULL |
ab83e314 | 360 | }, |
38df5a45 MC |
361 | { |
362 | TLSEXT_TYPE_early_data, | |
fe874d27 | 363 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS |
6e99ae58 | 364 | | SSL_EXT_TLS1_3_NEW_SESSION_TICKET | SSL_EXT_TLS1_3_ONLY, |
38df5a45 MC |
365 | NULL, tls_parse_ctos_early_data, tls_parse_stoc_early_data, |
366 | tls_construct_stoc_early_data, tls_construct_ctos_early_data, | |
367 | final_early_data | |
368 | }, | |
45615c5f DSH |
369 | { |
370 | TLSEXT_TYPE_certificate_authorities, | |
fe874d27 MC |
371 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST |
372 | | SSL_EXT_TLS1_3_ONLY, | |
45615c5f DSH |
373 | init_certificate_authorities, |
374 | tls_parse_certificate_authorities, tls_parse_certificate_authorities, | |
375 | tls_construct_certificate_authorities, | |
376 | tls_construct_certificate_authorities, NULL, | |
377 | }, | |
ab83e314 | 378 | { |
ec15acb6 | 379 | /* Must be immediately before pre_shared_key */ |
ab83e314 | 380 | TLSEXT_TYPE_padding, |
fe874d27 | 381 | SSL_EXT_CLIENT_HELLO, |
68db4dda | 382 | NULL, |
ab83e314 | 383 | /* We send this, but don't read it */ |
1266eefd | 384 | NULL, NULL, NULL, tls_construct_ctos_padding, NULL |
ec15acb6 MC |
385 | }, |
386 | { | |
387 | /* Required by the TLSv1.3 spec to always be the last extension */ | |
388 | TLSEXT_TYPE_psk, | |
fe874d27 MC |
389 | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_SERVER_HELLO |
390 | | SSL_EXT_TLS_IMPLEMENTATION_ONLY | SSL_EXT_TLS1_3_ONLY, | |
0247086d | 391 | NULL, tls_parse_ctos_psk, tls_parse_stoc_psk, tls_construct_stoc_psk, |
efe0f315 | 392 | tls_construct_ctos_psk, final_psk |
6b473aca MC |
393 | } |
394 | }; | |
395 | ||
ac44deaf TS |
396 | /* Returns a TLSEXT_TYPE for the given index */ |
397 | unsigned int ossl_get_extension_type(size_t idx) | |
398 | { | |
399 | size_t num_exts = OSSL_NELEM(ext_defs); | |
400 | ||
401 | if (idx >= num_exts) | |
402 | return TLSEXT_TYPE_out_of_range; | |
403 | ||
404 | return ext_defs[idx].type; | |
405 | } | |
406 | ||
43ae5eed | 407 | /* Check whether an extension's context matches the current context */ |
38b051a1 TM |
408 | static int validate_context(SSL_CONNECTION *s, unsigned int extctx, |
409 | unsigned int thisctx) | |
43ae5eed MC |
410 | { |
411 | /* Check we're allowed to use this extension in this context */ | |
412 | if ((thisctx & extctx) == 0) | |
413 | return 0; | |
414 | ||
38b051a1 | 415 | if (SSL_CONNECTION_IS_DTLS(s)) { |
43ae5eed MC |
416 | if ((extctx & SSL_EXT_TLS_ONLY) != 0) |
417 | return 0; | |
418 | } else if ((extctx & SSL_EXT_DTLS_ONLY) != 0) { | |
419 | return 0; | |
420 | } | |
421 | ||
422 | return 1; | |
423 | } | |
424 | ||
38b051a1 TM |
425 | int tls_validate_all_contexts(SSL_CONNECTION *s, unsigned int thisctx, |
426 | RAW_EXTENSION *exts) | |
88050dd1 MC |
427 | { |
428 | size_t i, num_exts, builtin_num = OSSL_NELEM(ext_defs), offset; | |
429 | RAW_EXTENSION *thisext; | |
430 | unsigned int context; | |
431 | ENDPOINT role = ENDPOINT_BOTH; | |
432 | ||
433 | if ((thisctx & SSL_EXT_CLIENT_HELLO) != 0) | |
434 | role = ENDPOINT_SERVER; | |
435 | else if ((thisctx & SSL_EXT_TLS1_2_SERVER_HELLO) != 0) | |
436 | role = ENDPOINT_CLIENT; | |
437 | ||
438 | /* Calculate the number of extensions in the extensions list */ | |
439 | num_exts = builtin_num + s->cert->custext.meths_count; | |
440 | ||
441 | for (thisext = exts, i = 0; i < num_exts; i++, thisext++) { | |
442 | if (!thisext->present) | |
443 | continue; | |
444 | ||
445 | if (i < builtin_num) { | |
446 | context = ext_defs[i].context; | |
447 | } else { | |
448 | custom_ext_method *meth = NULL; | |
449 | ||
450 | meth = custom_ext_find(&s->cert->custext, role, thisext->type, | |
451 | &offset); | |
452 | if (!ossl_assert(meth != NULL)) | |
453 | return 0; | |
454 | context = meth->context; | |
455 | } | |
456 | ||
457 | if (!validate_context(s, context, thisctx)) | |
458 | return 0; | |
459 | } | |
460 | ||
461 | return 1; | |
462 | } | |
463 | ||
6b473aca MC |
464 | /* |
465 | * Verify whether we are allowed to use the extension |type| in the current | |
466 | * |context|. Returns 1 to indicate the extension is allowed or unknown or 0 to | |
70af3d8e | 467 | * indicate the extension is not allowed. If returning 1 then |*found| is set to |
69687aa8 | 468 | * the definition for the extension we found. |
6b473aca | 469 | */ |
38b051a1 TM |
470 | static int verify_extension(SSL_CONNECTION *s, unsigned int context, |
471 | unsigned int type, custom_ext_methods *meths, | |
472 | RAW_EXTENSION *rawexlist, RAW_EXTENSION **found) | |
6b473aca MC |
473 | { |
474 | size_t i; | |
70af3d8e | 475 | size_t builtin_num = OSSL_NELEM(ext_defs); |
d270de32 | 476 | const EXTENSION_DEFINITION *thisext; |
6b473aca | 477 | |
1266eefd MC |
478 | for (i = 0, thisext = ext_defs; i < builtin_num; i++, thisext++) { |
479 | if (type == thisext->type) { | |
43ae5eed | 480 | if (!validate_context(s, thisext->context, context)) |
6b473aca MC |
481 | return 0; |
482 | ||
1266eefd | 483 | *found = &rawexlist[i]; |
6b473aca MC |
484 | return 1; |
485 | } | |
486 | } | |
487 | ||
70af3d8e MC |
488 | /* Check the custom extensions */ |
489 | if (meths != NULL) { | |
43ae5eed | 490 | size_t offset = 0; |
787d9ec7 | 491 | ENDPOINT role = ENDPOINT_BOTH; |
43ae5eed MC |
492 | custom_ext_method *meth = NULL; |
493 | ||
494 | if ((context & SSL_EXT_CLIENT_HELLO) != 0) | |
787d9ec7 | 495 | role = ENDPOINT_SERVER; |
43ae5eed | 496 | else if ((context & SSL_EXT_TLS1_2_SERVER_HELLO) != 0) |
787d9ec7 | 497 | role = ENDPOINT_CLIENT; |
43ae5eed | 498 | |
787d9ec7 | 499 | meth = custom_ext_find(meths, role, type, &offset); |
43ae5eed MC |
500 | if (meth != NULL) { |
501 | if (!validate_context(s, meth->context, context)) | |
502 | return 0; | |
503 | *found = &rawexlist[offset + builtin_num]; | |
504 | return 1; | |
6b473aca MC |
505 | } |
506 | } | |
507 | ||
70af3d8e | 508 | /* Unknown extension. We allow it */ |
1266eefd | 509 | *found = NULL; |
70af3d8e | 510 | return 1; |
6b473aca MC |
511 | } |
512 | ||
70af3d8e MC |
513 | /* |
514 | * Check whether the context defined for an extension |extctx| means whether | |
515 | * the extension is relevant for the current context |thisctx| or not. Returns | |
516 | * 1 if the extension is relevant for this context, and 0 otherwise | |
517 | */ | |
38b051a1 TM |
518 | int extension_is_relevant(SSL_CONNECTION *s, unsigned int extctx, |
519 | unsigned int thisctx) | |
805a2e9e | 520 | { |
a2b97bdf MC |
521 | int is_tls13; |
522 | ||
523 | /* | |
524 | * For HRR we haven't selected the version yet but we know it will be | |
525 | * TLSv1.3 | |
526 | */ | |
527 | if ((thisctx & SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST) != 0) | |
528 | is_tls13 = 1; | |
529 | else | |
38b051a1 | 530 | is_tls13 = SSL_CONNECTION_IS_TLS13(s); |
a2b97bdf | 531 | |
38b051a1 | 532 | if ((SSL_CONNECTION_IS_DTLS(s) |
fe874d27 | 533 | && (extctx & SSL_EXT_TLS_IMPLEMENTATION_ONLY) != 0) |
805a2e9e | 534 | || (s->version == SSL3_VERSION |
fe874d27 | 535 | && (extctx & SSL_EXT_SSL3_ALLOWED) == 0) |
ee36b963 BK |
536 | /* |
537 | * Note that SSL_IS_TLS13() means "TLS 1.3 has been negotiated", | |
538 | * which is never true when generating the ClientHello. | |
539 | * However, version negotiation *has* occurred by the time the | |
540 | * ClientHello extensions are being parsed. | |
541 | * Be careful to allow TLS 1.3-only extensions when generating | |
542 | * the ClientHello. | |
543 | */ | |
a2b97bdf | 544 | || (is_tls13 && (extctx & SSL_EXT_TLS1_2_AND_BELOW_ONLY) != 0) |
ee36b963 BK |
545 | || (!is_tls13 && (extctx & SSL_EXT_TLS1_3_ONLY) != 0 |
546 | && (thisctx & SSL_EXT_CLIENT_HELLO) == 0) | |
547 | || (s->server && !is_tls13 && (extctx & SSL_EXT_TLS1_3_ONLY) != 0) | |
43ae5eed | 548 | || (s->hit && (extctx & SSL_EXT_IGNORE_ON_RESUMPTION) != 0)) |
805a2e9e | 549 | return 0; |
805a2e9e MC |
550 | return 1; |
551 | } | |
552 | ||
6b473aca MC |
553 | /* |
554 | * Gather a list of all the extensions from the data in |packet]. |context| | |
70af3d8e | 555 | * tells us which message this extension is for. The raw extension data is |
29bfd5b7 MC |
556 | * stored in |*res| on success. We don't actually process the content of the |
557 | * extensions yet, except to check their types. This function also runs the | |
558 | * initialiser functions for all known extensions if |init| is nonzero (whether | |
559 | * we have collected them or not). If successful the caller is responsible for | |
560 | * freeing the contents of |*res|. | |
6b473aca MC |
561 | * |
562 | * Per http://tools.ietf.org/html/rfc5246#section-7.4.1.4, there may not be | |
563 | * more than one extension of the same type in a ClientHello or ServerHello. | |
564 | * This function returns 1 if all extensions are unique and we have parsed their | |
565 | * types, and 0 if the extensions contain duplicates, could not be successfully | |
1266eefd | 566 | * found, or an internal error occurred. We only check duplicates for |
70af3d8e | 567 | * extensions that we know about. We ignore others. |
6b473aca | 568 | */ |
38b051a1 TM |
569 | int tls_collect_extensions(SSL_CONNECTION *s, PACKET *packet, |
570 | unsigned int context, | |
f63a17d6 | 571 | RAW_EXTENSION **res, size_t *len, int init) |
6b473aca MC |
572 | { |
573 | PACKET extensions = *packet; | |
d270de32 | 574 | size_t i = 0; |
fc5ece2e | 575 | size_t num_exts; |
43ae5eed | 576 | custom_ext_methods *exts = &s->cert->custext; |
6b473aca | 577 | RAW_EXTENSION *raw_extensions = NULL; |
d270de32 | 578 | const EXTENSION_DEFINITION *thisexd; |
6b473aca | 579 | |
ecc2f938 MC |
580 | *res = NULL; |
581 | ||
70af3d8e MC |
582 | /* |
583 | * Initialise server side custom extensions. Client side is done during | |
584 | * construction of extensions for the ClientHello. | |
585 | */ | |
43ae5eed MC |
586 | if ((context & SSL_EXT_CLIENT_HELLO) != 0) |
587 | custom_ext_init(&s->cert->custext); | |
70af3d8e | 588 | |
fc5ece2e BK |
589 | num_exts = OSSL_NELEM(ext_defs) + (exts != NULL ? exts->meths_count : 0); |
590 | raw_extensions = OPENSSL_zalloc(num_exts * sizeof(*raw_extensions)); | |
70af3d8e | 591 | if (raw_extensions == NULL) { |
c48ffbcc | 592 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); |
70af3d8e MC |
593 | return 0; |
594 | } | |
595 | ||
193b5d76 | 596 | i = 0; |
6b473aca | 597 | while (PACKET_remaining(&extensions) > 0) { |
b186a592 | 598 | unsigned int type, idx; |
6b473aca | 599 | PACKET extension; |
1266eefd | 600 | RAW_EXTENSION *thisex; |
6b473aca MC |
601 | |
602 | if (!PACKET_get_net_2(&extensions, &type) || | |
603 | !PACKET_get_length_prefixed_2(&extensions, &extension)) { | |
c48ffbcc | 604 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
6b473aca MC |
605 | goto err; |
606 | } | |
70af3d8e MC |
607 | /* |
608 | * Verify this extension is allowed. We only check duplicates for | |
652a6b7e MC |
609 | * extensions that we recognise. We also have a special case for the |
610 | * PSK extension, which must be the last one in the ClientHello. | |
70af3d8e | 611 | */ |
1266eefd | 612 | if (!verify_extension(s, context, type, exts, raw_extensions, &thisex) |
652a6b7e MC |
613 | || (thisex != NULL && thisex->present == 1) |
614 | || (type == TLSEXT_TYPE_psk | |
fe874d27 | 615 | && (context & SSL_EXT_CLIENT_HELLO) != 0 |
652a6b7e | 616 | && PACKET_remaining(&extensions) != 0)) { |
c48ffbcc | 617 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_EXTENSION); |
6b473aca MC |
618 | goto err; |
619 | } | |
b186a592 MC |
620 | idx = thisex - raw_extensions; |
621 | /*- | |
622 | * Check that we requested this extension (if appropriate). Requests can | |
623 | * be sent in the ClientHello and CertificateRequest. Unsolicited | |
624 | * extensions can be sent in the NewSessionTicket. We only do this for | |
625 | * the built-in extensions. Custom extensions have a different but | |
626 | * similar check elsewhere. | |
627 | * Special cases: | |
628 | * - The HRR cookie extension is unsolicited | |
629 | * - The renegotiate extension is unsolicited (the client signals | |
630 | * support via an SCSV) | |
631 | * - The signed_certificate_timestamp extension can be provided by a | |
632 | * custom extension or by the built-in version. We let the extension | |
633 | * itself handle unsolicited response checks. | |
634 | */ | |
635 | if (idx < OSSL_NELEM(ext_defs) | |
636 | && (context & (SSL_EXT_CLIENT_HELLO | |
637 | | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST | |
638 | | SSL_EXT_TLS1_3_NEW_SESSION_TICKET)) == 0 | |
639 | && type != TLSEXT_TYPE_cookie | |
640 | && type != TLSEXT_TYPE_renegotiate | |
641 | && type != TLSEXT_TYPE_signed_certificate_timestamp | |
673e0bbb DB |
642 | && (s->ext.extflags[idx] & SSL_EXT_FLAG_SENT) == 0 |
643 | #ifndef OPENSSL_NO_GOST | |
644 | && !((context & SSL_EXT_TLS1_2_SERVER_HELLO) != 0 | |
645 | && type == TLSEXT_TYPE_cryptopro_bug) | |
646 | #endif | |
dd6b2706 | 647 | ) { |
f63a17d6 | 648 | SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION, |
c48ffbcc | 649 | SSL_R_UNSOLICITED_EXTENSION); |
b186a592 MC |
650 | goto err; |
651 | } | |
1266eefd MC |
652 | if (thisex != NULL) { |
653 | thisex->data = extension; | |
654 | thisex->present = 1; | |
655 | thisex->type = type; | |
193b5d76 | 656 | thisex->received_order = i++; |
b93a295a | 657 | if (s->ext.debug_cb) |
38b051a1 TM |
658 | s->ext.debug_cb(SSL_CONNECTION_GET_SSL(s), !s->server, |
659 | thisex->type, PACKET_data(&thisex->data), | |
b93a295a TS |
660 | PACKET_remaining(&thisex->data), |
661 | s->ext.debug_arg); | |
6b473aca MC |
662 | } |
663 | } | |
664 | ||
735d5b59 TT |
665 | if (init) { |
666 | /* | |
667 | * Initialise all known extensions relevant to this context, | |
668 | * whether we have found them or not | |
669 | */ | |
670 | for (thisexd = ext_defs, i = 0; i < OSSL_NELEM(ext_defs); | |
671 | i++, thisexd++) { | |
bf5c84f5 TT |
672 | if (thisexd->init != NULL && (thisexd->context & context) != 0 |
673 | && extension_is_relevant(s, thisexd->context, context) | |
674 | && !thisexd->init(s, context)) { | |
f63a17d6 | 675 | /* SSLfatal() already called */ |
735d5b59 TT |
676 | goto err; |
677 | } | |
68db4dda MC |
678 | } |
679 | } | |
680 | ||
6b473aca | 681 | *res = raw_extensions; |
fc5ece2e BK |
682 | if (len != NULL) |
683 | *len = num_exts; | |
6b473aca MC |
684 | return 1; |
685 | ||
686 | err: | |
687 | OPENSSL_free(raw_extensions); | |
688 | return 0; | |
689 | } | |
690 | ||
68db4dda | 691 | /* |
70af3d8e MC |
692 | * Runs the parser for a given extension with index |idx|. |exts| contains the |
693 | * list of all parsed extensions previously collected by | |
694 | * tls_collect_extensions(). The parser is only run if it is applicable for the | |
f97d4c37 MC |
695 | * given |context| and the parser has not already been run. If this is for a |
696 | * Certificate message, then we also provide the parser with the relevant | |
8521ced6 | 697 | * Certificate |x| and its position in the |chainidx| with 0 being the first |
29bfd5b7 MC |
698 | * Certificate. Returns 1 on success or 0 on failure. If an extension is not |
699 | * present this counted as success. | |
68db4dda | 700 | */ |
38b051a1 | 701 | int tls_parse_extension(SSL_CONNECTION *s, TLSEXT_INDEX idx, int context, |
f63a17d6 | 702 | RAW_EXTENSION *exts, X509 *x, size_t chainidx) |
6b473aca | 703 | { |
70af3d8e | 704 | RAW_EXTENSION *currext = &exts[idx]; |
38b051a1 | 705 | int (*parser)(SSL_CONNECTION *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 706 | size_t chainidx) = NULL; |
6b473aca | 707 | |
70af3d8e MC |
708 | /* Skip if the extension is not present */ |
709 | if (!currext->present) | |
710 | return 1; | |
6b473aca | 711 | |
70af3d8e MC |
712 | /* Skip if we've already parsed this extension */ |
713 | if (currext->parsed) | |
714 | return 1; | |
6b473aca | 715 | |
70af3d8e MC |
716 | currext->parsed = 1; |
717 | ||
718 | if (idx < OSSL_NELEM(ext_defs)) { | |
719 | /* We are handling a built-in extension */ | |
720 | const EXTENSION_DEFINITION *extdef = &ext_defs[idx]; | |
721 | ||
722 | /* Check if extension is defined for our protocol. If not, skip */ | |
723 | if (!extension_is_relevant(s, extdef->context, context)) | |
724 | return 1; | |
725 | ||
1266eefd | 726 | parser = s->server ? extdef->parse_ctos : extdef->parse_stoc; |
224135e9 | 727 | |
1266eefd | 728 | if (parser != NULL) |
f63a17d6 | 729 | return parser(s, &currext->data, context, x, chainidx); |
6b473aca | 730 | |
70af3d8e MC |
731 | /* |
732 | * If the parser is NULL we fall through to the custom extension | |
733 | * processing | |
734 | */ | |
6b473aca MC |
735 | } |
736 | ||
43ae5eed | 737 | /* Parse custom extensions */ |
f63a17d6 MC |
738 | return custom_ext_parse(s, context, currext->type, |
739 | PACKET_data(&currext->data), | |
740 | PACKET_remaining(&currext->data), | |
741 | x, chainidx); | |
805a2e9e MC |
742 | } |
743 | ||
744 | /* | |
745 | * Parse all remaining extensions that have not yet been parsed. Also calls the | |
735d5b59 TT |
746 | * finalisation for all extensions at the end if |fin| is nonzero, whether we |
747 | * collected them or not. Returns 1 for success or 0 for failure. If we are | |
748 | * working on a Certificate message then we also pass the Certificate |x| and | |
29bfd5b7 | 749 | * its position in the |chainidx|, with 0 being the first certificate. |
805a2e9e | 750 | */ |
38b051a1 TM |
751 | int tls_parse_all_extensions(SSL_CONNECTION *s, int context, |
752 | RAW_EXTENSION *exts, X509 *x, | |
f63a17d6 | 753 | size_t chainidx, int fin) |
805a2e9e | 754 | { |
1266eefd | 755 | size_t i, numexts = OSSL_NELEM(ext_defs); |
d270de32 | 756 | const EXTENSION_DEFINITION *thisexd; |
805a2e9e | 757 | |
70af3d8e | 758 | /* Calculate the number of extensions in the extensions list */ |
43ae5eed | 759 | numexts += s->cert->custext.meths_count; |
70af3d8e MC |
760 | |
761 | /* Parse each extension in turn */ | |
1266eefd | 762 | for (i = 0; i < numexts; i++) { |
f63a17d6 MC |
763 | if (!tls_parse_extension(s, i, context, exts, x, chainidx)) { |
764 | /* SSLfatal() already called */ | |
70af3d8e | 765 | return 0; |
f63a17d6 | 766 | } |
70af3d8e | 767 | } |
805a2e9e | 768 | |
735d5b59 TT |
769 | if (fin) { |
770 | /* | |
771 | * Finalise all known extensions relevant to this context, | |
772 | * whether we have found them or not | |
773 | */ | |
774 | for (i = 0, thisexd = ext_defs; i < OSSL_NELEM(ext_defs); | |
775 | i++, thisexd++) { | |
bf5c84f5 | 776 | if (thisexd->final != NULL && (thisexd->context & context) != 0 |
f63a17d6 MC |
777 | && !thisexd->final(s, context, exts[i].present)) { |
778 | /* SSLfatal() already called */ | |
735d5b59 | 779 | return 0; |
f63a17d6 | 780 | } |
735d5b59 | 781 | } |
68db4dda MC |
782 | } |
783 | ||
6b473aca MC |
784 | return 1; |
785 | } | |
786 | ||
38b051a1 TM |
787 | int should_add_extension(SSL_CONNECTION *s, unsigned int extctx, |
788 | unsigned int thisctx, int max_version) | |
43ae5eed MC |
789 | { |
790 | /* Skip if not relevant for our context */ | |
791 | if ((extctx & thisctx) == 0) | |
792 | return 0; | |
793 | ||
794 | /* Check if this extension is defined for our protocol. If not, skip */ | |
ee36b963 | 795 | if (!extension_is_relevant(s, extctx, thisctx) |
43ae5eed MC |
796 | || ((extctx & SSL_EXT_TLS1_3_ONLY) != 0 |
797 | && (thisctx & SSL_EXT_CLIENT_HELLO) != 0 | |
38b051a1 | 798 | && (SSL_CONNECTION_IS_DTLS(s) || max_version < TLS1_3_VERSION))) |
43ae5eed MC |
799 | return 0; |
800 | ||
801 | return 1; | |
802 | } | |
803 | ||
6b473aca | 804 | /* |
70af3d8e | 805 | * Construct all the extensions relevant to the current |context| and write |
30aeba43 | 806 | * them to |pkt|. If this is an extension for a Certificate in a Certificate |
8521ced6 MC |
807 | * message, then |x| will be set to the Certificate we are handling, and |
808 | * |chainidx| will indicate the position in the chainidx we are processing (with | |
f63a17d6 | 809 | * 0 being the first in the chain). Returns 1 on success or 0 on failure. On a |
8521ced6 | 810 | * failure construction stops at the first extension to fail to construct. |
6b473aca | 811 | */ |
38b051a1 TM |
812 | int tls_construct_extensions(SSL_CONNECTION *s, WPACKET *pkt, |
813 | unsigned int context, | |
f63a17d6 | 814 | X509 *x, size_t chainidx) |
224135e9 | 815 | { |
1266eefd | 816 | size_t i; |
f63a17d6 | 817 | int min_version, max_version = 0, reason; |
d270de32 | 818 | const EXTENSION_DEFINITION *thisexd; |
224135e9 MC |
819 | |
820 | if (!WPACKET_start_sub_packet_u16(pkt) | |
821 | /* | |
822 | * If extensions are of zero length then we don't even add the | |
1c259bb5 BK |
823 | * extensions length bytes to a ClientHello/ServerHello |
824 | * (for non-TLSv1.3). | |
224135e9 | 825 | */ |
fe874d27 MC |
826 | || ((context & |
827 | (SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO)) != 0 | |
fe874d27 | 828 | && !WPACKET_set_flags(pkt, |
224135e9 | 829 | WPACKET_FLAGS_ABANDON_ON_ZERO_LENGTH))) { |
c48ffbcc | 830 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f63a17d6 | 831 | return 0; |
224135e9 MC |
832 | } |
833 | ||
fe874d27 | 834 | if ((context & SSL_EXT_CLIENT_HELLO) != 0) { |
b5b993b2 | 835 | reason = ssl_get_min_max_version(s, &min_version, &max_version, NULL); |
ab83e314 | 836 | if (reason != 0) { |
c48ffbcc | 837 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, reason); |
f63a17d6 | 838 | return 0; |
ab83e314 MC |
839 | } |
840 | } | |
841 | ||
842 | /* Add custom extensions first */ | |
fe874d27 | 843 | if ((context & SSL_EXT_CLIENT_HELLO) != 0) { |
44e69951 | 844 | /* On the server side with initialise during ClientHello parsing */ |
43ae5eed | 845 | custom_ext_init(&s->cert->custext); |
ab83e314 | 846 | } |
f63a17d6 MC |
847 | if (!custom_ext_add(s, context, pkt, x, chainidx, max_version)) { |
848 | /* SSLfatal() already called */ | |
849 | return 0; | |
ab83e314 MC |
850 | } |
851 | ||
1266eefd | 852 | for (i = 0, thisexd = ext_defs; i < OSSL_NELEM(ext_defs); i++, thisexd++) { |
38b051a1 TM |
853 | EXT_RETURN (*construct)(SSL_CONNECTION *s, WPACKET *pkt, |
854 | unsigned int context, | |
f63a17d6 | 855 | X509 *x, size_t chainidx); |
b186a592 | 856 | EXT_RETURN ret; |
4b299b8e | 857 | |
224135e9 | 858 | /* Skip if not relevant for our context */ |
43ae5eed | 859 | if (!should_add_extension(s, thisexd->context, context, max_version)) |
224135e9 MC |
860 | continue; |
861 | ||
1266eefd MC |
862 | construct = s->server ? thisexd->construct_stoc |
863 | : thisexd->construct_ctos; | |
224135e9 | 864 | |
43ae5eed | 865 | if (construct == NULL) |
224135e9 MC |
866 | continue; |
867 | ||
f63a17d6 MC |
868 | ret = construct(s, pkt, context, x, chainidx); |
869 | if (ret == EXT_RETURN_FAIL) { | |
870 | /* SSLfatal() already called */ | |
871 | return 0; | |
872 | } | |
b186a592 MC |
873 | if (ret == EXT_RETURN_SENT |
874 | && (context & (SSL_EXT_CLIENT_HELLO | |
875 | | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST | |
876 | | SSL_EXT_TLS1_3_NEW_SESSION_TICKET)) != 0) | |
877 | s->ext.extflags[i] |= SSL_EXT_FLAG_SENT; | |
224135e9 MC |
878 | } |
879 | ||
224135e9 | 880 | if (!WPACKET_close(pkt)) { |
c48ffbcc | 881 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f63a17d6 | 882 | return 0; |
224135e9 MC |
883 | } |
884 | ||
885 | return 1; | |
886 | } | |
805a2e9e | 887 | |
70af3d8e MC |
888 | /* |
889 | * Built in extension finalisation and initialisation functions. All initialise | |
890 | * or finalise the associated extension type for the given |context|. For | |
891 | * finalisers |sent| is set to 1 if we saw the extension during parsing, and 0 | |
29bfd5b7 | 892 | * otherwise. These functions return 1 on success or 0 on failure. |
70af3d8e MC |
893 | */ |
894 | ||
38b051a1 | 895 | static int final_renegotiate(SSL_CONNECTION *s, unsigned int context, int sent) |
805a2e9e | 896 | { |
332eb390 MC |
897 | if (!s->server) { |
898 | /* | |
899 | * Check if we can connect to a server that doesn't support safe | |
900 | * renegotiation | |
901 | */ | |
902 | if (!(s->options & SSL_OP_LEGACY_SERVER_CONNECT) | |
903 | && !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION) | |
904 | && !sent) { | |
c48ffbcc | 905 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
f63a17d6 | 906 | SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED); |
332eb390 MC |
907 | return 0; |
908 | } | |
909 | ||
805a2e9e | 910 | return 1; |
332eb390 | 911 | } |
805a2e9e MC |
912 | |
913 | /* Need RI if renegotiating */ | |
914 | if (s->renegotiate | |
915 | && !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION) | |
916 | && !sent) { | |
c48ffbcc | 917 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
f63a17d6 | 918 | SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED); |
805a2e9e MC |
919 | return 0; |
920 | } | |
921 | ||
332eb390 | 922 | |
805a2e9e MC |
923 | return 1; |
924 | } | |
925 | ||
acce0557 P |
926 | static ossl_inline void ssl_tsan_decr(const SSL_CTX *ctx, |
927 | TSAN_QUALIFIER int *stat) | |
928 | { | |
929 | if (ssl_tsan_lock(ctx)) { | |
930 | tsan_decr(stat); | |
931 | ssl_tsan_unlock(ctx); | |
932 | } | |
933 | } | |
934 | ||
38b051a1 | 935 | static int init_server_name(SSL_CONNECTION *s, unsigned int context) |
805a2e9e | 936 | { |
f01344cb | 937 | if (s->server) { |
805a2e9e MC |
938 | s->servername_done = 0; |
939 | ||
f01344cb MC |
940 | OPENSSL_free(s->ext.hostname); |
941 | s->ext.hostname = NULL; | |
942 | } | |
943 | ||
805a2e9e MC |
944 | return 1; |
945 | } | |
946 | ||
38b051a1 | 947 | static int final_server_name(SSL_CONNECTION *s, unsigned int context, int sent) |
805a2e9e | 948 | { |
9ef9088c | 949 | int ret = SSL_TLSEXT_ERR_NOACK; |
805a2e9e | 950 | int altmp = SSL_AD_UNRECOGNIZED_NAME; |
38b051a1 TM |
951 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); |
952 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); | |
953 | int was_ticket = (SSL_get_options(ssl) & SSL_OP_NO_TICKET) == 0; | |
805a2e9e | 954 | |
38b051a1 | 955 | if (!ossl_assert(sctx != NULL) || !ossl_assert(s->session_ctx != NULL)) { |
c48ffbcc | 956 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
c4715212 MC |
957 | return 0; |
958 | } | |
959 | ||
38b051a1 TM |
960 | if (sctx->ext.servername_cb != NULL) |
961 | ret = sctx->ext.servername_cb(ssl, &altmp, | |
962 | sctx->ext.servername_arg); | |
c4715212 | 963 | else if (s->session_ctx->ext.servername_cb != NULL) |
38b051a1 | 964 | ret = s->session_ctx->ext.servername_cb(ssl, &altmp, |
222da979 | 965 | s->session_ctx->ext.servername_arg); |
805a2e9e | 966 | |
1c4aa31d BK |
967 | /* |
968 | * For servers, propagate the SNI hostname from the temporary | |
969 | * storage in the SSL to the persistent SSL_SESSION, now that we | |
970 | * know we accepted it. | |
971 | * Clients make this copy when parsing the server's response to | |
972 | * the extension, which is when they find out that the negotiation | |
973 | * was successful. | |
974 | */ | |
975 | if (s->server) { | |
2a538551 | 976 | if (sent && ret == SSL_TLSEXT_ERR_OK && !s->hit) { |
1c4aa31d BK |
977 | /* Only store the hostname in the session if we accepted it. */ |
978 | OPENSSL_free(s->session->ext.hostname); | |
979 | s->session->ext.hostname = OPENSSL_strdup(s->ext.hostname); | |
980 | if (s->session->ext.hostname == NULL && s->ext.hostname != NULL) { | |
c48ffbcc | 981 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
1c4aa31d BK |
982 | } |
983 | } | |
9fb6cb81 MC |
984 | } |
985 | ||
3be08e30 BK |
986 | /* |
987 | * If we switched contexts (whether here or in the client_hello callback), | |
988 | * move the sess_accept increment from the session_ctx to the new | |
989 | * context, to avoid the confusing situation of having sess_accept_good | |
990 | * exceed sess_accept (zero) for the new context. | |
991 | */ | |
38b051a1 | 992 | if (SSL_IS_FIRST_HANDSHAKE(s) && sctx != s->session_ctx |
2d6f72aa | 993 | && s->hello_retry_request == SSL_HRR_NONE) { |
38b051a1 | 994 | ssl_tsan_counter(sctx, &sctx->stats.sess_accept); |
acce0557 | 995 | ssl_tsan_decr(s->session_ctx, &s->session_ctx->stats.sess_accept); |
3be08e30 BK |
996 | } |
997 | ||
a84e5c9a TS |
998 | /* |
999 | * If we're expecting to send a ticket, and tickets were previously enabled, | |
1000 | * and now tickets are disabled, then turn off expected ticket. | |
1001 | * Also, if this is not a resumption, create a new session ID | |
1002 | */ | |
1003 | if (ret == SSL_TLSEXT_ERR_OK && s->ext.ticket_expected | |
38b051a1 | 1004 | && was_ticket && (SSL_get_options(ssl) & SSL_OP_NO_TICKET) != 0) { |
a84e5c9a TS |
1005 | s->ext.ticket_expected = 0; |
1006 | if (!s->hit) { | |
38b051a1 | 1007 | SSL_SESSION* ss = SSL_get_session(ssl); |
a84e5c9a TS |
1008 | |
1009 | if (ss != NULL) { | |
1010 | OPENSSL_free(ss->ext.tick); | |
1011 | ss->ext.tick = NULL; | |
1012 | ss->ext.ticklen = 0; | |
1013 | ss->ext.tick_lifetime_hint = 0; | |
1014 | ss->ext.tick_age_add = 0; | |
a84e5c9a | 1015 | if (!ssl_generate_session_id(s, ss)) { |
c48ffbcc | 1016 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f63a17d6 | 1017 | return 0; |
a84e5c9a TS |
1018 | } |
1019 | } else { | |
c48ffbcc | 1020 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f63a17d6 | 1021 | return 0; |
a84e5c9a TS |
1022 | } |
1023 | } | |
1024 | } | |
1025 | ||
805a2e9e MC |
1026 | switch (ret) { |
1027 | case SSL_TLSEXT_ERR_ALERT_FATAL: | |
c48ffbcc | 1028 | SSLfatal(s, altmp, SSL_R_CALLBACK_FAILED); |
805a2e9e MC |
1029 | return 0; |
1030 | ||
1031 | case SSL_TLSEXT_ERR_ALERT_WARNING: | |
fb62e47c | 1032 | /* TLSv1.3 doesn't have warning alerts so we suppress this */ |
38b051a1 | 1033 | if (!SSL_CONNECTION_IS_TLS13(s)) |
fb62e47c | 1034 | ssl3_send_alert(s, SSL3_AL_WARNING, altmp); |
cd624ccd | 1035 | s->servername_done = 0; |
805a2e9e MC |
1036 | return 1; |
1037 | ||
1038 | case SSL_TLSEXT_ERR_NOACK: | |
1039 | s->servername_done = 0; | |
1040 | return 1; | |
1041 | ||
1042 | default: | |
1043 | return 1; | |
1044 | } | |
1045 | } | |
1046 | ||
38b051a1 TM |
1047 | static int final_ec_pt_formats(SSL_CONNECTION *s, unsigned int context, |
1048 | int sent) | |
332eb390 MC |
1049 | { |
1050 | unsigned long alg_k, alg_a; | |
1051 | ||
1052 | if (s->server) | |
1053 | return 1; | |
1054 | ||
555cbb32 TS |
1055 | alg_k = s->s3.tmp.new_cipher->algorithm_mkey; |
1056 | alg_a = s->s3.tmp.new_cipher->algorithm_auth; | |
332eb390 MC |
1057 | |
1058 | /* | |
1059 | * If we are client and using an elliptic curve cryptography cipher | |
1060 | * suite, then if server returns an EC point formats lists extension it | |
1061 | * must contain uncompressed. | |
1062 | */ | |
aff8c126 RS |
1063 | if (s->ext.ecpointformats != NULL |
1064 | && s->ext.ecpointformats_len > 0 | |
cd0fb43c MC |
1065 | && s->ext.peer_ecpointformats != NULL |
1066 | && s->ext.peer_ecpointformats_len > 0 | |
1266eefd | 1067 | && ((alg_k & SSL_kECDHE) || (alg_a & SSL_aECDSA))) { |
332eb390 MC |
1068 | /* we are using an ECC cipher */ |
1069 | size_t i; | |
cd0fb43c | 1070 | unsigned char *list = s->ext.peer_ecpointformats; |
1266eefd | 1071 | |
cd0fb43c | 1072 | for (i = 0; i < s->ext.peer_ecpointformats_len; i++) { |
1266eefd | 1073 | if (*list++ == TLSEXT_ECPOINTFORMAT_uncompressed) |
332eb390 | 1074 | break; |
332eb390 | 1075 | } |
cd0fb43c | 1076 | if (i == s->ext.peer_ecpointformats_len) { |
c48ffbcc | 1077 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 | 1078 | SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST); |
332eb390 MC |
1079 | return 0; |
1080 | } | |
1081 | } | |
1082 | ||
1083 | return 1; | |
1084 | } | |
332eb390 | 1085 | |
38b051a1 | 1086 | static int init_session_ticket(SSL_CONNECTION *s, unsigned int context) |
332eb390 MC |
1087 | { |
1088 | if (!s->server) | |
aff8c126 | 1089 | s->ext.ticket_expected = 0; |
332eb390 MC |
1090 | |
1091 | return 1; | |
1092 | } | |
1093 | ||
8f8c11d8 | 1094 | #ifndef OPENSSL_NO_OCSP |
38b051a1 | 1095 | static int init_status_request(SSL_CONNECTION *s, unsigned int context) |
805a2e9e | 1096 | { |
f63e4288 | 1097 | if (s->server) { |
aff8c126 | 1098 | s->ext.status_type = TLSEXT_STATUSTYPE_nothing; |
f63e4288 MC |
1099 | } else { |
1100 | /* | |
1101 | * Ensure we get sensible values passed to tlsext_status_cb in the event | |
1102 | * that we don't receive a status message | |
1103 | */ | |
8cbfcc70 RS |
1104 | OPENSSL_free(s->ext.ocsp.resp); |
1105 | s->ext.ocsp.resp = NULL; | |
1106 | s->ext.ocsp.resp_len = 0; | |
f63e4288 | 1107 | } |
332eb390 MC |
1108 | |
1109 | return 1; | |
1110 | } | |
8f8c11d8 | 1111 | #endif |
332eb390 | 1112 | |
805a2e9e | 1113 | #ifndef OPENSSL_NO_NEXTPROTONEG |
38b051a1 | 1114 | static int init_npn(SSL_CONNECTION *s, unsigned int context) |
805a2e9e | 1115 | { |
555cbb32 | 1116 | s->s3.npn_seen = 0; |
805a2e9e MC |
1117 | |
1118 | return 1; | |
1119 | } | |
1120 | #endif | |
1121 | ||
38b051a1 | 1122 | static int init_alpn(SSL_CONNECTION *s, unsigned int context) |
805a2e9e | 1123 | { |
555cbb32 TS |
1124 | OPENSSL_free(s->s3.alpn_selected); |
1125 | s->s3.alpn_selected = NULL; | |
1126 | s->s3.alpn_selected_len = 0; | |
805a2e9e | 1127 | if (s->server) { |
555cbb32 TS |
1128 | OPENSSL_free(s->s3.alpn_proposed); |
1129 | s->s3.alpn_proposed = NULL; | |
1130 | s->s3.alpn_proposed_len = 0; | |
805a2e9e | 1131 | } |
805a2e9e MC |
1132 | return 1; |
1133 | } | |
1134 | ||
38b051a1 | 1135 | static int final_alpn(SSL_CONNECTION *s, unsigned int context, int sent) |
630369d9 | 1136 | { |
4be3a7c7 MC |
1137 | if (!s->server && !sent && s->session->ext.alpn_selected != NULL) |
1138 | s->ext.early_data_ok = 0; | |
1139 | ||
38b051a1 | 1140 | if (!s->server || !SSL_CONNECTION_IS_TLS13(s)) |
630369d9 MC |
1141 | return 1; |
1142 | ||
1143 | /* | |
1144 | * Call alpn_select callback if needed. Has to be done after SNI and | |
1145 | * cipher negotiation (HTTP/2 restricts permitted ciphers). In TLSv1.3 | |
1146 | * we also have to do this before we decide whether to accept early_data. | |
1147 | * In TLSv1.3 we've already negotiated our cipher so we do this call now. | |
1148 | * For < TLSv1.3 we defer it until after cipher negotiation. | |
56d36288 | 1149 | * |
f63a17d6 | 1150 | * On failure SSLfatal() already called. |
630369d9 | 1151 | */ |
f63a17d6 | 1152 | return tls_handle_alpn(s); |
630369d9 MC |
1153 | } |
1154 | ||
38b051a1 | 1155 | static int init_sig_algs(SSL_CONNECTION *s, unsigned int context) |
805a2e9e MC |
1156 | { |
1157 | /* Clear any signature algorithms extension received */ | |
555cbb32 TS |
1158 | OPENSSL_free(s->s3.tmp.peer_sigalgs); |
1159 | s->s3.tmp.peer_sigalgs = NULL; | |
02b1636f | 1160 | s->s3.tmp.peer_sigalgslen = 0; |
805a2e9e MC |
1161 | |
1162 | return 1; | |
1163 | } | |
1164 | ||
38b051a1 TM |
1165 | static int init_sig_algs_cert(SSL_CONNECTION *s, |
1166 | ossl_unused unsigned int context) | |
c589c34e BK |
1167 | { |
1168 | /* Clear any signature algorithms extension received */ | |
555cbb32 TS |
1169 | OPENSSL_free(s->s3.tmp.peer_cert_sigalgs); |
1170 | s->s3.tmp.peer_cert_sigalgs = NULL; | |
39a14059 | 1171 | s->s3.tmp.peer_cert_sigalgslen = 0; |
c589c34e BK |
1172 | |
1173 | return 1; | |
1174 | } | |
1175 | ||
805a2e9e | 1176 | #ifndef OPENSSL_NO_SRP |
38b051a1 | 1177 | static int init_srp(SSL_CONNECTION *s, unsigned int context) |
805a2e9e MC |
1178 | { |
1179 | OPENSSL_free(s->srp_ctx.login); | |
1180 | s->srp_ctx.login = NULL; | |
1181 | ||
1182 | return 1; | |
1183 | } | |
1184 | #endif | |
1185 | ||
38b051a1 | 1186 | static int init_ec_point_formats(SSL_CONNECTION *s, unsigned int context) |
3f987381 DB |
1187 | { |
1188 | OPENSSL_free(s->ext.peer_ecpointformats); | |
1189 | s->ext.peer_ecpointformats = NULL; | |
1190 | s->ext.peer_ecpointformats_len = 0; | |
1191 | ||
1192 | return 1; | |
1193 | } | |
1194 | ||
38b051a1 | 1195 | static int init_etm(SSL_CONNECTION *s, unsigned int context) |
805a2e9e | 1196 | { |
28a31a0a | 1197 | s->ext.use_etm = 0; |
332eb390 MC |
1198 | |
1199 | return 1; | |
1200 | } | |
1201 | ||
38b051a1 | 1202 | static int init_ems(SSL_CONNECTION *s, unsigned int context) |
332eb390 | 1203 | { |
11d3235e TM |
1204 | if (s->s3.flags & TLS1_FLAGS_RECEIVED_EXTMS) { |
1205 | s->s3.flags &= ~TLS1_FLAGS_RECEIVED_EXTMS; | |
1206 | s->s3.flags |= TLS1_FLAGS_REQUIRED_EXTMS; | |
1207 | } | |
332eb390 MC |
1208 | |
1209 | return 1; | |
1210 | } | |
1211 | ||
38b051a1 | 1212 | static int final_ems(SSL_CONNECTION *s, unsigned int context, int sent) |
332eb390 | 1213 | { |
11d3235e TM |
1214 | /* |
1215 | * Check extended master secret extension is not dropped on | |
1216 | * renegotiation. | |
1217 | */ | |
1218 | if (!(s->s3.flags & TLS1_FLAGS_RECEIVED_EXTMS) | |
1219 | && (s->s3.flags & TLS1_FLAGS_REQUIRED_EXTMS)) { | |
c48ffbcc | 1220 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_INCONSISTENT_EXTMS); |
11d3235e TM |
1221 | return 0; |
1222 | } | |
332eb390 MC |
1223 | if (!s->server && s->hit) { |
1224 | /* | |
1225 | * Check extended master secret extension is consistent with | |
1226 | * original session. | |
1227 | */ | |
555cbb32 | 1228 | if (!(s->s3.flags & TLS1_FLAGS_RECEIVED_EXTMS) != |
332eb390 | 1229 | !(s->session->flags & SSL_SESS_FLAG_EXTMS)) { |
c48ffbcc | 1230 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_INCONSISTENT_EXTMS); |
332eb390 MC |
1231 | return 0; |
1232 | } | |
1233 | } | |
805a2e9e MC |
1234 | |
1235 | return 1; | |
1236 | } | |
1237 | ||
38b051a1 | 1238 | static int init_certificate_authorities(SSL_CONNECTION *s, unsigned int context) |
45615c5f | 1239 | { |
555cbb32 TS |
1240 | sk_X509_NAME_pop_free(s->s3.tmp.peer_ca_names, X509_NAME_free); |
1241 | s->s3.tmp.peer_ca_names = NULL; | |
45615c5f DSH |
1242 | return 1; |
1243 | } | |
1244 | ||
38b051a1 TM |
1245 | static EXT_RETURN tls_construct_certificate_authorities(SSL_CONNECTION *s, |
1246 | WPACKET *pkt, | |
b186a592 MC |
1247 | unsigned int context, |
1248 | X509 *x, | |
f63a17d6 | 1249 | size_t chainidx) |
45615c5f | 1250 | { |
98732979 | 1251 | const STACK_OF(X509_NAME) *ca_sk = get_ca_names(s); |
45615c5f DSH |
1252 | |
1253 | if (ca_sk == NULL || sk_X509_NAME_num(ca_sk) == 0) | |
b186a592 | 1254 | return EXT_RETURN_NOT_SENT; |
45615c5f DSH |
1255 | |
1256 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_certificate_authorities) | |
f63a17d6 | 1257 | || !WPACKET_start_sub_packet_u16(pkt)) { |
c48ffbcc | 1258 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
b186a592 | 1259 | return EXT_RETURN_FAIL; |
45615c5f DSH |
1260 | } |
1261 | ||
98732979 | 1262 | if (!construct_ca_names(s, ca_sk, pkt)) { |
f63a17d6 MC |
1263 | /* SSLfatal() already called */ |
1264 | return EXT_RETURN_FAIL; | |
1265 | } | |
1266 | ||
1267 | if (!WPACKET_close(pkt)) { | |
c48ffbcc | 1268 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f63a17d6 MC |
1269 | return EXT_RETURN_FAIL; |
1270 | } | |
1271 | ||
b186a592 | 1272 | return EXT_RETURN_SENT; |
45615c5f DSH |
1273 | } |
1274 | ||
38b051a1 | 1275 | static int tls_parse_certificate_authorities(SSL_CONNECTION *s, PACKET *pkt, |
45615c5f | 1276 | unsigned int context, X509 *x, |
f63a17d6 | 1277 | size_t chainidx) |
45615c5f | 1278 | { |
f63a17d6 | 1279 | if (!parse_ca_names(s, pkt)) |
45615c5f DSH |
1280 | return 0; |
1281 | if (PACKET_remaining(pkt) != 0) { | |
c48ffbcc | 1282 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_EXTENSION); |
45615c5f DSH |
1283 | return 0; |
1284 | } | |
1285 | return 1; | |
1286 | } | |
1287 | ||
805a2e9e | 1288 | #ifndef OPENSSL_NO_SRTP |
38b051a1 | 1289 | static int init_srtp(SSL_CONNECTION *s, unsigned int context) |
805a2e9e MC |
1290 | { |
1291 | if (s->server) | |
1292 | s->srtp_profile = NULL; | |
1293 | ||
1294 | return 1; | |
1295 | } | |
1296 | #endif | |
04904312 | 1297 | |
38b051a1 | 1298 | static int final_sig_algs(SSL_CONNECTION *s, unsigned int context, int sent) |
04904312 | 1299 | { |
38b051a1 | 1300 | if (!sent && SSL_CONNECTION_IS_TLS13(s) && !s->hit) { |
c48ffbcc | 1301 | SSLfatal(s, TLS13_AD_MISSING_EXTENSION, |
f63a17d6 | 1302 | SSL_R_MISSING_SIGALGS_EXTENSION); |
04904312 MC |
1303 | return 0; |
1304 | } | |
1305 | ||
1306 | return 1; | |
1307 | } | |
b2f7e8c0 | 1308 | |
38b051a1 | 1309 | static int final_key_share(SSL_CONNECTION *s, unsigned int context, int sent) |
f4bbb37c | 1310 | { |
65dc5c3c | 1311 | #if !defined(OPENSSL_NO_TLS1_3) |
38b051a1 | 1312 | if (!SSL_CONNECTION_IS_TLS13(s)) |
f4bbb37c MC |
1313 | return 1; |
1314 | ||
07d447a6 MC |
1315 | /* Nothing to do for key_share in an HRR */ |
1316 | if ((context & SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST) != 0) | |
1317 | return 1; | |
1318 | ||
f4bbb37c MC |
1319 | /* |
1320 | * If | |
aff9929b MC |
1321 | * we are a client |
1322 | * AND | |
f4bbb37c MC |
1323 | * we have no key_share |
1324 | * AND | |
1325 | * (we are not resuming | |
1326 | * OR the kex_mode doesn't allow non key_share resumes) | |
1327 | * THEN | |
aff9929b | 1328 | * fail; |
f4bbb37c | 1329 | */ |
aff9929b MC |
1330 | if (!s->server |
1331 | && !sent | |
f4bbb37c MC |
1332 | && (!s->hit |
1333 | || (s->ext.psk_kex_mode & TLSEXT_KEX_MODE_FLAG_KE) == 0)) { | |
7d061fce | 1334 | /* Nothing left we can do - just fail */ |
c48ffbcc | 1335 | SSLfatal(s, SSL_AD_MISSING_EXTENSION, SSL_R_NO_SUITABLE_KEY_SHARE); |
f4bbb37c MC |
1336 | return 0; |
1337 | } | |
aff9929b | 1338 | /* |
c36001c3 | 1339 | * IF |
aff9929b | 1340 | * we are a server |
aff9929b | 1341 | * THEN |
c36001c3 MC |
1342 | * IF |
1343 | * we have a suitable key_share | |
aff9929b | 1344 | * THEN |
c36001c3 MC |
1345 | * IF |
1346 | * we are stateless AND we have no cookie | |
1347 | * THEN | |
1348 | * send a HelloRetryRequest | |
1349 | * ELSE | |
1350 | * IF | |
1351 | * we didn't already send a HelloRetryRequest | |
1352 | * AND | |
1353 | * the client sent a key_share extension | |
1354 | * AND | |
1355 | * (we are not resuming | |
1356 | * OR the kex_mode allows key_share resumes) | |
1357 | * AND | |
1358 | * a shared group exists | |
1359 | * THEN | |
1360 | * send a HelloRetryRequest | |
1361 | * ELSE IF | |
1362 | * we are not resuming | |
1363 | * OR | |
1364 | * the kex_mode doesn't allow non key_share resumes | |
1365 | * THEN | |
1366 | * fail | |
1367 | * ELSE IF | |
1368 | * we are stateless AND we have no cookie | |
1369 | * THEN | |
1370 | * send a HelloRetryRequest | |
aff9929b | 1371 | */ |
c36001c3 | 1372 | if (s->server) { |
555cbb32 | 1373 | if (s->s3.peer_tmp != NULL) { |
c36001c3 | 1374 | /* We have a suitable key_share */ |
555cbb32 | 1375 | if ((s->s3.flags & TLS1_FLAGS_STATELESS) != 0 |
c36001c3 MC |
1376 | && !s->ext.cookieok) { |
1377 | if (!ossl_assert(s->hello_retry_request == SSL_HRR_NONE)) { | |
1378 | /* | |
1379 | * If we are stateless then we wouldn't know about any | |
1380 | * previously sent HRR - so how can this be anything other | |
1381 | * than 0? | |
1382 | */ | |
c48ffbcc | 1383 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
c36001c3 MC |
1384 | return 0; |
1385 | } | |
1386 | s->hello_retry_request = SSL_HRR_PENDING; | |
1387 | return 1; | |
1388 | } | |
1389 | } else { | |
1390 | /* No suitable key_share */ | |
1391 | if (s->hello_retry_request == SSL_HRR_NONE && sent | |
1392 | && (!s->hit | |
1393 | || (s->ext.psk_kex_mode & TLSEXT_KEX_MODE_FLAG_KE_DHE) | |
1394 | != 0)) { | |
1395 | const uint16_t *pgroups, *clntgroups; | |
1396 | size_t num_groups, clnt_num_groups, i; | |
1397 | unsigned int group_id = 0; | |
1398 | ||
1399 | /* Check if a shared group exists */ | |
1400 | ||
1401 | /* Get the clients list of supported groups. */ | |
1402 | tls1_get_peer_groups(s, &clntgroups, &clnt_num_groups); | |
1403 | tls1_get_supported_groups(s, &pgroups, &num_groups); | |
1404 | ||
1405 | /* | |
1406 | * Find the first group we allow that is also in client's list | |
1407 | */ | |
1408 | for (i = 0; i < num_groups; i++) { | |
1409 | group_id = pgroups[i]; | |
1410 | ||
1411 | if (check_in_list(s, group_id, clntgroups, clnt_num_groups, | |
0a10825a | 1412 | 2)) |
c36001c3 MC |
1413 | break; |
1414 | } | |
1415 | ||
1416 | if (i < num_groups) { | |
1417 | /* A shared group exists so send a HelloRetryRequest */ | |
555cbb32 | 1418 | s->s3.group_id = group_id; |
c36001c3 MC |
1419 | s->hello_retry_request = SSL_HRR_PENDING; |
1420 | return 1; | |
1421 | } | |
1422 | } | |
1423 | if (!s->hit | |
1424 | || (s->ext.psk_kex_mode & TLSEXT_KEX_MODE_FLAG_KE) == 0) { | |
1425 | /* Nothing left we can do - just fail */ | |
1426 | SSLfatal(s, sent ? SSL_AD_HANDSHAKE_FAILURE | |
1427 | : SSL_AD_MISSING_EXTENSION, | |
c48ffbcc | 1428 | SSL_R_NO_SUITABLE_KEY_SHARE); |
c36001c3 | 1429 | return 0; |
aff9929b MC |
1430 | } |
1431 | ||
555cbb32 | 1432 | if ((s->s3.flags & TLS1_FLAGS_STATELESS) != 0 |
c36001c3 MC |
1433 | && !s->ext.cookieok) { |
1434 | if (!ossl_assert(s->hello_retry_request == SSL_HRR_NONE)) { | |
1435 | /* | |
1436 | * If we are stateless then we wouldn't know about any | |
1437 | * previously sent HRR - so how can this be anything other | |
1438 | * than 0? | |
1439 | */ | |
c48ffbcc | 1440 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
c36001c3 MC |
1441 | return 0; |
1442 | } | |
fc7129dc | 1443 | s->hello_retry_request = SSL_HRR_PENDING; |
aff9929b MC |
1444 | return 1; |
1445 | } | |
1446 | } | |
c36001c3 MC |
1447 | |
1448 | /* | |
1449 | * We have a key_share so don't send any more HelloRetryRequest | |
1450 | * messages | |
1451 | */ | |
1452 | if (s->hello_retry_request == SSL_HRR_PENDING) | |
1453 | s->hello_retry_request = SSL_HRR_COMPLETE; | |
1454 | } else { | |
1455 | /* | |
1456 | * For a client side resumption with no key_share we need to generate | |
1457 | * the handshake secret (otherwise this is done during key_share | |
1458 | * processing). | |
1459 | */ | |
1460 | if (!sent && !tls13_generate_handshake_secret(s, NULL, 0)) { | |
c48ffbcc | 1461 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
aff9929b MC |
1462 | return 0; |
1463 | } | |
1464 | } | |
65dc5c3c | 1465 | #endif /* !defined(OPENSSL_NO_TLS1_3) */ |
f4bbb37c MC |
1466 | return 1; |
1467 | } | |
1468 | ||
38b051a1 | 1469 | static int init_psk_kex_modes(SSL_CONNECTION *s, unsigned int context) |
b2f7e8c0 MC |
1470 | { |
1471 | s->ext.psk_kex_mode = TLSEXT_KEX_MODE_FLAG_NONE; | |
b2f7e8c0 MC |
1472 | return 1; |
1473 | } | |
1053a6e2 | 1474 | |
38b051a1 TM |
1475 | int tls_psk_do_binder(SSL_CONNECTION *s, const EVP_MD *md, |
1476 | const unsigned char *msgstart, | |
1053a6e2 | 1477 | size_t binderoffset, const unsigned char *binderin, |
3a7c56b2 MC |
1478 | unsigned char *binderout, SSL_SESSION *sess, int sign, |
1479 | int external) | |
1053a6e2 MC |
1480 | { |
1481 | EVP_PKEY *mackey = NULL; | |
1482 | EVP_MD_CTX *mctx = NULL; | |
1483 | unsigned char hash[EVP_MAX_MD_SIZE], binderkey[EVP_MAX_MD_SIZE]; | |
1484 | unsigned char finishedkey[EVP_MAX_MD_SIZE], tmpbinder[EVP_MAX_MD_SIZE]; | |
4ff1a526 | 1485 | unsigned char *early_secret; |
44e47328 TS |
1486 | /* ASCII: "res binder", in hex for EBCDIC compatibility */ |
1487 | static const unsigned char resumption_label[] = "\x72\x65\x73\x20\x62\x69\x6E\x64\x65\x72"; | |
1488 | /* ASCII: "ext binder", in hex for EBCDIC compatibility */ | |
1489 | static const unsigned char external_label[] = "\x65\x78\x74\x20\x62\x69\x6E\x64\x65\x72"; | |
4ff1a526 MC |
1490 | const unsigned char *label; |
1491 | size_t bindersize, labelsize, hashsize; | |
ed576acd | 1492 | int hashsizei = EVP_MD_get_size(md); |
1053a6e2 | 1493 | int ret = -1; |
add8d0e9 | 1494 | int usepskfored = 0; |
38b051a1 | 1495 | SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s); |
add8d0e9 | 1496 | |
bceae201 MC |
1497 | /* Ensure cast to size_t is safe */ |
1498 | if (!ossl_assert(hashsizei >= 0)) { | |
c48ffbcc | 1499 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
bceae201 MC |
1500 | goto err; |
1501 | } | |
1502 | hashsize = (size_t)hashsizei; | |
1503 | ||
add8d0e9 MC |
1504 | if (external |
1505 | && s->early_data_state == SSL_EARLY_DATA_CONNECTING | |
1506 | && s->session->ext.max_early_data == 0 | |
1507 | && sess->ext.max_early_data > 0) | |
1508 | usepskfored = 1; | |
1053a6e2 | 1509 | |
3a7c56b2 MC |
1510 | if (external) { |
1511 | label = external_label; | |
1512 | labelsize = sizeof(external_label) - 1; | |
1513 | } else { | |
1514 | label = resumption_label; | |
1515 | labelsize = sizeof(resumption_label) - 1; | |
1516 | } | |
1517 | ||
9368f865 MC |
1518 | /* |
1519 | * Generate the early_secret. On the server side we've selected a PSK to | |
1520 | * resume with (internal or external) so we always do this. On the client | |
add8d0e9 MC |
1521 | * side we do this for a non-external (i.e. resumption) PSK or external PSK |
1522 | * that will be used for early_data so that it is in place for sending early | |
1523 | * data. For client side external PSK not being used for early_data we | |
9368f865 MC |
1524 | * generate it but store it away for later use. |
1525 | */ | |
add8d0e9 | 1526 | if (s->server || !external || usepskfored) |
9368f865 MC |
1527 | early_secret = (unsigned char *)s->early_secret; |
1528 | else | |
1529 | early_secret = (unsigned char *)sess->early_secret; | |
4ff1a526 MC |
1530 | |
1531 | if (!tls13_generate_secret(s, md, NULL, sess->master_key, | |
1532 | sess->master_key_length, early_secret)) { | |
635c8f77 | 1533 | /* SSLfatal() already called */ |
1053a6e2 MC |
1534 | goto err; |
1535 | } | |
1536 | ||
1537 | /* | |
1538 | * Create the handshake hash for the binder key...the messages so far are | |
1539 | * empty! | |
1540 | */ | |
1541 | mctx = EVP_MD_CTX_new(); | |
1542 | if (mctx == NULL | |
1543 | || EVP_DigestInit_ex(mctx, md, NULL) <= 0 | |
1544 | || EVP_DigestFinal_ex(mctx, hash, NULL) <= 0) { | |
c48ffbcc | 1545 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
1053a6e2 MC |
1546 | goto err; |
1547 | } | |
1548 | ||
1549 | /* Generate the binder key */ | |
4ff1a526 | 1550 | if (!tls13_hkdf_expand(s, md, early_secret, label, labelsize, hash, |
0fb2815b | 1551 | hashsize, binderkey, hashsize, 1)) { |
635c8f77 | 1552 | /* SSLfatal() already called */ |
1053a6e2 MC |
1553 | goto err; |
1554 | } | |
1555 | ||
1556 | /* Generate the finished key */ | |
1557 | if (!tls13_derive_finishedkey(s, md, binderkey, finishedkey, hashsize)) { | |
635c8f77 | 1558 | /* SSLfatal() already called */ |
1053a6e2 MC |
1559 | goto err; |
1560 | } | |
1561 | ||
aff9929b | 1562 | if (EVP_DigestInit_ex(mctx, md, NULL) <= 0) { |
c48ffbcc | 1563 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
aff9929b MC |
1564 | goto err; |
1565 | } | |
1566 | ||
1053a6e2 | 1567 | /* |
aff9929b MC |
1568 | * Get a hash of the ClientHello up to the start of the binders. If we are |
1569 | * following a HelloRetryRequest then this includes the hash of the first | |
1570 | * ClientHello and the HelloRetryRequest itself. | |
1053a6e2 | 1571 | */ |
fc7129dc | 1572 | if (s->hello_retry_request == SSL_HRR_PENDING) { |
aff9929b | 1573 | size_t hdatalen; |
60690b5b | 1574 | long hdatalen_l; |
aff9929b MC |
1575 | void *hdata; |
1576 | ||
60690b5b | 1577 | hdatalen = hdatalen_l = |
555cbb32 | 1578 | BIO_get_mem_data(s->s3.handshake_buffer, &hdata); |
60690b5b | 1579 | if (hdatalen_l <= 0) { |
c48ffbcc | 1580 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_HANDSHAKE_LENGTH); |
aff9929b MC |
1581 | goto err; |
1582 | } | |
1583 | ||
1584 | /* | |
1585 | * For servers the handshake buffer data will include the second | |
1586 | * ClientHello - which we don't want - so we need to take that bit off. | |
1587 | */ | |
1588 | if (s->server) { | |
77815a02 MC |
1589 | PACKET hashprefix, msg; |
1590 | ||
1591 | /* Find how many bytes are left after the first two messages */ | |
1592 | if (!PACKET_buf_init(&hashprefix, hdata, hdatalen) | |
1593 | || !PACKET_forward(&hashprefix, 1) | |
1594 | || !PACKET_get_length_prefixed_3(&hashprefix, &msg) | |
1595 | || !PACKET_forward(&hashprefix, 1) | |
1596 | || !PACKET_get_length_prefixed_3(&hashprefix, &msg)) { | |
c48ffbcc | 1597 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
aff9929b MC |
1598 | goto err; |
1599 | } | |
77815a02 | 1600 | hdatalen -= PACKET_remaining(&hashprefix); |
aff9929b MC |
1601 | } |
1602 | ||
1603 | if (EVP_DigestUpdate(mctx, hdata, hdatalen) <= 0) { | |
c48ffbcc | 1604 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
aff9929b MC |
1605 | goto err; |
1606 | } | |
1607 | } | |
1608 | ||
1609 | if (EVP_DigestUpdate(mctx, msgstart, binderoffset) <= 0 | |
1053a6e2 | 1610 | || EVP_DigestFinal_ex(mctx, hash, NULL) <= 0) { |
c48ffbcc | 1611 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
1053a6e2 MC |
1612 | goto err; |
1613 | } | |
1614 | ||
38b051a1 TM |
1615 | mackey = EVP_PKEY_new_raw_private_key_ex(sctx->libctx, "HMAC", |
1616 | sctx->propq, finishedkey, | |
d8652be0 | 1617 | hashsize); |
1053a6e2 | 1618 | if (mackey == NULL) { |
c48ffbcc | 1619 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
1053a6e2 MC |
1620 | goto err; |
1621 | } | |
1622 | ||
1623 | if (!sign) | |
1624 | binderout = tmpbinder; | |
1625 | ||
1626 | bindersize = hashsize; | |
38b051a1 TM |
1627 | if (EVP_DigestSignInit_ex(mctx, NULL, EVP_MD_get0_name(md), sctx->libctx, |
1628 | sctx->propq, mackey, NULL) <= 0 | |
1053a6e2 MC |
1629 | || EVP_DigestSignUpdate(mctx, hash, hashsize) <= 0 |
1630 | || EVP_DigestSignFinal(mctx, binderout, &bindersize) <= 0 | |
1631 | || bindersize != hashsize) { | |
c48ffbcc | 1632 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
1053a6e2 MC |
1633 | goto err; |
1634 | } | |
1635 | ||
1636 | if (sign) { | |
1637 | ret = 1; | |
1638 | } else { | |
1639 | /* HMAC keys can't do EVP_DigestVerify* - use CRYPTO_memcmp instead */ | |
1640 | ret = (CRYPTO_memcmp(binderin, binderout, hashsize) == 0); | |
635c8f77 | 1641 | if (!ret) |
c48ffbcc | 1642 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BINDER_DOES_NOT_VERIFY); |
1053a6e2 MC |
1643 | } |
1644 | ||
1645 | err: | |
1646 | OPENSSL_cleanse(binderkey, sizeof(binderkey)); | |
1647 | OPENSSL_cleanse(finishedkey, sizeof(finishedkey)); | |
1648 | EVP_PKEY_free(mackey); | |
1649 | EVP_MD_CTX_free(mctx); | |
1650 | ||
1651 | return ret; | |
1652 | } | |
38df5a45 | 1653 | |
38b051a1 | 1654 | static int final_early_data(SSL_CONNECTION *s, unsigned int context, int sent) |
38df5a45 | 1655 | { |
4be3a7c7 MC |
1656 | if (!sent) |
1657 | return 1; | |
1658 | ||
1659 | if (!s->server) { | |
1660 | if (context == SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS | |
1661 | && sent | |
1662 | && !s->ext.early_data_ok) { | |
1663 | /* | |
1664 | * If we get here then the server accepted our early_data but we | |
1665 | * later realised that it shouldn't have done (e.g. inconsistent | |
1666 | * ALPN) | |
1667 | */ | |
c48ffbcc | 1668 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_BAD_EARLY_DATA); |
4be3a7c7 MC |
1669 | return 0; |
1670 | } | |
1671 | ||
38df5a45 | 1672 | return 1; |
4be3a7c7 | 1673 | } |
38df5a45 MC |
1674 | |
1675 | if (s->max_early_data == 0 | |
1676 | || !s->hit | |
38df5a45 MC |
1677 | || s->early_data_state != SSL_EARLY_DATA_ACCEPTING |
1678 | || !s->ext.early_data_ok | |
c9598459 | 1679 | || s->hello_retry_request != SSL_HRR_NONE |
59b2cb26 | 1680 | || (s->allow_early_data_cb != NULL |
38b051a1 | 1681 | && !s->allow_early_data_cb(SSL_CONNECTION_GET_SSL(s), |
59b2cb26 | 1682 | s->allow_early_data_cb_data))) { |
38df5a45 MC |
1683 | s->ext.early_data = SSL_EARLY_DATA_REJECTED; |
1684 | } else { | |
1685 | s->ext.early_data = SSL_EARLY_DATA_ACCEPTED; | |
1686 | ||
1687 | if (!tls13_change_cipher_state(s, | |
1688 | SSL3_CC_EARLY | SSL3_CHANGE_CIPHER_SERVER_READ)) { | |
f63a17d6 | 1689 | /* SSLfatal() already called */ |
38df5a45 MC |
1690 | return 0; |
1691 | } | |
1692 | } | |
1693 | ||
1694 | return 1; | |
1695 | } | |
cf72c757 | 1696 | |
38b051a1 TM |
1697 | static int final_maxfragmentlen(SSL_CONNECTION *s, unsigned int context, |
1698 | int sent) | |
cf72c757 F |
1699 | { |
1700 | /* | |
1701 | * Session resumption on server-side with MFL extension active | |
1702 | * BUT MFL extension packet was not resent (i.e. sent == 0) | |
1703 | */ | |
f63a17d6 | 1704 | if (s->server && s->hit && USE_MAX_FRAGMENT_LENGTH_EXT(s->session) |
cf72c757 | 1705 | && !sent ) { |
c48ffbcc | 1706 | SSLfatal(s, SSL_AD_MISSING_EXTENSION, SSL_R_BAD_EXTENSION); |
cf72c757 F |
1707 | return 0; |
1708 | } | |
1709 | ||
1710 | /* Current SSL buffer is lower than requested MFL */ | |
f63a17d6 MC |
1711 | if (s->session && USE_MAX_FRAGMENT_LENGTH_EXT(s->session) |
1712 | && s->max_send_fragment < GET_MAX_FRAGMENT_LENGTH(s->session)) | |
cf72c757 | 1713 | /* trigger a larger buffer reallocation */ |
f63a17d6 MC |
1714 | if (!ssl3_setup_buffers(s)) { |
1715 | /* SSLfatal() already called */ | |
cf72c757 | 1716 | return 0; |
f63a17d6 | 1717 | } |
cf72c757 F |
1718 | |
1719 | return 1; | |
1720 | } | |
9d75dce3 | 1721 | |
38b051a1 TM |
1722 | static int init_post_handshake_auth(SSL_CONNECTION *s, |
1723 | ossl_unused unsigned int context) | |
9d75dce3 TS |
1724 | { |
1725 | s->post_handshake_auth = SSL_PHA_NONE; | |
1726 | ||
1727 | return 1; | |
1728 | } | |
efe0f315 BK |
1729 | |
1730 | /* | |
1731 | * If clients offer "pre_shared_key" without a "psk_key_exchange_modes" | |
1732 | * extension, servers MUST abort the handshake. | |
1733 | */ | |
38b051a1 | 1734 | static int final_psk(SSL_CONNECTION *s, unsigned int context, int sent) |
efe0f315 BK |
1735 | { |
1736 | if (s->server && sent && s->clienthello != NULL | |
1737 | && !s->clienthello->pre_proc_exts[TLSEXT_IDX_psk_kex_modes].present) { | |
1738 | SSLfatal(s, TLS13_AD_MISSING_EXTENSION, | |
1739 | SSL_R_MISSING_PSK_KEX_MODES_EXTENSION); | |
1740 | return 0; | |
1741 | } | |
1742 | ||
1743 | return 1; | |
1744 | } |