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Add support for the TLS 1.3 signature_algorithms_cert extension
[thirdparty/openssl.git] / ssl / statem / statem_locl.h
1 /*
2 * Copyright 2015-2017 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 /*****************************************************************************
11 * *
12 * The following definitions are PRIVATE to the state machine. They should *
13 * NOT be used outside of the state machine. *
14 * *
15 *****************************************************************************/
16
17 /* Max message length definitions */
18
19 /* The spec allows for a longer length than this, but we limit it */
20 #define HELLO_VERIFY_REQUEST_MAX_LENGTH 258
21 #define END_OF_EARLY_DATA_MAX_LENGTH 0
22 #define SERVER_HELLO_MAX_LENGTH 20000
23 #define HELLO_RETRY_REQUEST_MAX_LENGTH 20000
24 #define ENCRYPTED_EXTENSIONS_MAX_LENGTH 20000
25 #define SERVER_KEY_EXCH_MAX_LENGTH 102400
26 #define SERVER_HELLO_DONE_MAX_LENGTH 0
27 #define KEY_UPDATE_MAX_LENGTH 1
28 #define CCS_MAX_LENGTH 1
29 /* Max should actually be 36 but we are generous */
30 #define FINISHED_MAX_LENGTH 64
31
32 /* The maximum number of incoming KeyUpdate messages we will accept */
33 #define MAX_KEY_UPDATE_MESSAGES 32
34
35 /* Dummy message type */
36 #define SSL3_MT_DUMMY -1
37
38 extern const unsigned char hrrrandom[];
39
40 /* Message processing return codes */
41 typedef enum {
42 /* Something bad happened */
43 MSG_PROCESS_ERROR,
44 /* We've finished reading - swap to writing */
45 MSG_PROCESS_FINISHED_READING,
46 /*
47 * We've completed the main processing of this message but there is some
48 * post processing to be done.
49 */
50 MSG_PROCESS_CONTINUE_PROCESSING,
51 /* We've finished this message - read the next message */
52 MSG_PROCESS_CONTINUE_READING
53 } MSG_PROCESS_RETURN;
54
55 typedef int (*confunc_f) (SSL *s, WPACKET *pkt);
56
57 int check_in_list(SSL *s, uint16_t group_id, const uint16_t *groups,
58 size_t num_groups, int checkallow);
59 int create_synthetic_message_hash(SSL *s, const unsigned char *hashval,
60 size_t hashlen, const unsigned char *hrr,
61 size_t hrrlen);
62 int parse_ca_names(SSL *s, PACKET *pkt);
63 int construct_ca_names(SSL *s, WPACKET *pkt);
64 size_t construct_key_exchange_tbs(SSL *s, unsigned char **ptbs,
65 const void *param, size_t paramlen);
66
67 /*
68 * TLS/DTLS client state machine functions
69 */
70 int ossl_statem_client_read_transition(SSL *s, int mt);
71 WRITE_TRAN ossl_statem_client_write_transition(SSL *s);
72 WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst);
73 WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst);
74 int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt,
75 confunc_f *confunc, int *mt);
76 size_t ossl_statem_client_max_message_size(SSL *s);
77 MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt);
78 WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst);
79
80 /*
81 * TLS/DTLS server state machine functions
82 */
83 int ossl_statem_server_read_transition(SSL *s, int mt);
84 WRITE_TRAN ossl_statem_server_write_transition(SSL *s);
85 WORK_STATE ossl_statem_server_pre_work(SSL *s, WORK_STATE wst);
86 WORK_STATE ossl_statem_server_post_work(SSL *s, WORK_STATE wst);
87 int ossl_statem_server_construct_message(SSL *s, WPACKET *pkt,
88 confunc_f *confunc,int *mt);
89 size_t ossl_statem_server_max_message_size(SSL *s);
90 MSG_PROCESS_RETURN ossl_statem_server_process_message(SSL *s, PACKET *pkt);
91 WORK_STATE ossl_statem_server_post_process_message(SSL *s, WORK_STATE wst);
92
93 /* Functions for getting new message data */
94 __owur int tls_get_message_header(SSL *s, int *mt);
95 __owur int tls_get_message_body(SSL *s, size_t *len);
96 __owur int dtls_get_message(SSL *s, int *mt, size_t *len);
97
98 /* Message construction and processing functions */
99 __owur int tls_process_initial_server_flight(SSL *s);
100 __owur MSG_PROCESS_RETURN tls_process_change_cipher_spec(SSL *s, PACKET *pkt);
101 __owur MSG_PROCESS_RETURN tls_process_finished(SSL *s, PACKET *pkt);
102 __owur int tls_construct_change_cipher_spec(SSL *s, WPACKET *pkt);
103 __owur int dtls_construct_change_cipher_spec(SSL *s, WPACKET *pkt);
104
105 __owur int tls_construct_finished(SSL *s, WPACKET *pkt);
106 __owur int tls_construct_key_update(SSL *s, WPACKET *pkt);
107 __owur MSG_PROCESS_RETURN tls_process_key_update(SSL *s, PACKET *pkt);
108 __owur WORK_STATE tls_finish_handshake(SSL *s, WORK_STATE wst, int clearbufs,
109 int stop);
110 __owur WORK_STATE dtls_wait_for_dry(SSL *s);
111
112 /* some client-only functions */
113 __owur int tls_construct_client_hello(SSL *s, WPACKET *pkt);
114 __owur MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt);
115 __owur MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt);
116 __owur MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt);
117 __owur int tls_process_cert_status_body(SSL *s, PACKET *pkt);
118 __owur MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt);
119 __owur MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt);
120 __owur int tls_construct_cert_verify(SSL *s, WPACKET *pkt);
121 __owur WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst);
122 __owur int tls_construct_client_certificate(SSL *s, WPACKET *pkt);
123 __owur int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey);
124 __owur int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt);
125 __owur int tls_client_key_exchange_post_work(SSL *s);
126 __owur int tls_construct_cert_status_body(SSL *s, WPACKET *pkt);
127 __owur int tls_construct_cert_status(SSL *s, WPACKET *pkt);
128 __owur MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt);
129 __owur MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt);
130 __owur int ssl3_check_cert_and_algorithm(SSL *s);
131 #ifndef OPENSSL_NO_NEXTPROTONEG
132 __owur int tls_construct_next_proto(SSL *s, WPACKET *pkt);
133 #endif
134 __owur MSG_PROCESS_RETURN tls_process_hello_req(SSL *s, PACKET *pkt);
135 __owur MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt);
136 __owur int tls_construct_end_of_early_data(SSL *s, WPACKET *pkt);
137
138 /* some server-only functions */
139 __owur MSG_PROCESS_RETURN tls_process_client_hello(SSL *s, PACKET *pkt);
140 __owur WORK_STATE tls_post_process_client_hello(SSL *s, WORK_STATE wst);
141 __owur int tls_construct_server_hello(SSL *s, WPACKET *pkt);
142 __owur int dtls_construct_hello_verify_request(SSL *s, WPACKET *pkt);
143 __owur int tls_construct_server_certificate(SSL *s, WPACKET *pkt);
144 __owur int tls_construct_server_key_exchange(SSL *s, WPACKET *pkt);
145 __owur int tls_construct_certificate_request(SSL *s, WPACKET *pkt);
146 __owur int tls_construct_server_done(SSL *s, WPACKET *pkt);
147 __owur MSG_PROCESS_RETURN tls_process_client_certificate(SSL *s, PACKET *pkt);
148 __owur MSG_PROCESS_RETURN tls_process_client_key_exchange(SSL *s, PACKET *pkt);
149 __owur WORK_STATE tls_post_process_client_key_exchange(SSL *s, WORK_STATE wst);
150 __owur MSG_PROCESS_RETURN tls_process_cert_verify(SSL *s, PACKET *pkt);
151 #ifndef OPENSSL_NO_NEXTPROTONEG
152 __owur MSG_PROCESS_RETURN tls_process_next_proto(SSL *s, PACKET *pkt);
153 #endif
154 __owur int tls_construct_new_session_ticket(SSL *s, WPACKET *pkt);
155 MSG_PROCESS_RETURN tls_process_end_of_early_data(SSL *s, PACKET *pkt);
156
157
158 /* Extension processing */
159
160 typedef enum ext_return_en {
161 EXT_RETURN_FAIL,
162 EXT_RETURN_SENT,
163 EXT_RETURN_NOT_SENT
164 } EXT_RETURN;
165
166 __owur int tls_validate_all_contexts(SSL *s, unsigned int thisctx,
167 RAW_EXTENSION *exts);
168 __owur int extension_is_relevant(SSL *s, unsigned int extctx,
169 unsigned int thisctx);
170 __owur int tls_collect_extensions(SSL *s, PACKET *packet, unsigned int context,
171 RAW_EXTENSION **res, size_t *len, int init);
172 __owur int tls_parse_extension(SSL *s, TLSEXT_INDEX idx, int context,
173 RAW_EXTENSION *exts, X509 *x, size_t chainidx);
174 __owur int tls_parse_all_extensions(SSL *s, int context, RAW_EXTENSION *exts,
175 X509 *x, size_t chainidx, int fin);
176 __owur int should_add_extension(SSL *s, unsigned int extctx,
177 unsigned int thisctx, int max_version);
178 __owur int tls_construct_extensions(SSL *s, WPACKET *pkt, unsigned int context,
179 X509 *x, size_t chainidx);
180
181 __owur int tls_psk_do_binder(SSL *s, const EVP_MD *md,
182 const unsigned char *msgstart,
183 size_t binderoffset, const unsigned char *binderin,
184 unsigned char *binderout,
185 SSL_SESSION *sess, int sign, int external);
186
187 /* Server Extension processing */
188 int tls_parse_ctos_renegotiate(SSL *s, PACKET *pkt, unsigned int context,
189 X509 *x, size_t chainidx);
190 int tls_parse_ctos_server_name(SSL *s, PACKET *pkt, unsigned int context,
191 X509 *x, size_t chainidx);
192 int tls_parse_ctos_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context,
193 X509 *x, size_t chainidx);
194 #ifndef OPENSSL_NO_SRP
195 int tls_parse_ctos_srp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
196 size_t chainidx);
197 #endif
198 int tls_parse_ctos_early_data(SSL *s, PACKET *pkt, unsigned int context,
199 X509 *x, size_t chainidx);
200 #ifndef OPENSSL_NO_EC
201 int tls_parse_ctos_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context,
202 X509 *x, size_t chainidx);
203 int tls_parse_ctos_supported_groups(SSL *s, PACKET *pkt, unsigned int context,
204 X509 *x, size_t chainidxl);
205 #endif
206 int tls_parse_ctos_session_ticket(SSL *s, PACKET *pkt, unsigned int context,
207 X509 *x, size_t chainidx);
208 int tls_parse_ctos_sig_algs_cert(SSL *s, PACKET *pkt, unsigned int context,
209 X509 *x, size_t chainidx);
210 int tls_parse_ctos_sig_algs(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
211 size_t chainidx);
212 #ifndef OPENSSL_NO_OCSP
213 int tls_parse_ctos_status_request(SSL *s, PACKET *pkt, unsigned int context,
214 X509 *x, size_t chainidx);
215 #endif
216 #ifndef OPENSSL_NO_NEXTPROTONEG
217 int tls_parse_ctos_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
218 size_t chainidx);
219 #endif
220 int tls_parse_ctos_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
221 size_t chainidx);
222 #ifndef OPENSSL_NO_SRTP
223 int tls_parse_ctos_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
224 size_t chainidx);
225 #endif
226 int tls_parse_ctos_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
227 size_t chainidx);
228 int tls_parse_ctos_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
229 size_t chainidx);
230 int tls_parse_ctos_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
231 size_t chainidx);
232 int tls_parse_ctos_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
233 size_t chainidx);
234 int tls_parse_ctos_psk_kex_modes(SSL *s, PACKET *pkt, unsigned int context,
235 X509 *x, size_t chainidx);
236 int tls_parse_ctos_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
237 size_t chainidx);
238
239 EXT_RETURN tls_construct_stoc_renegotiate(SSL *s, WPACKET *pkt,
240 unsigned int context, X509 *x,
241 size_t chainidx);
242 EXT_RETURN tls_construct_stoc_server_name(SSL *s, WPACKET *pkt,
243 unsigned int context, X509 *x,
244 size_t chainidx);
245 EXT_RETURN tls_construct_stoc_early_data(SSL *s, WPACKET *pkt,
246 unsigned int context, X509 *x,
247 size_t chainidx);
248 EXT_RETURN tls_construct_stoc_maxfragmentlen(SSL *s, WPACKET *pkt,
249 unsigned int context, X509 *x,
250 size_t chainidx);
251 #ifndef OPENSSL_NO_EC
252 EXT_RETURN tls_construct_stoc_ec_pt_formats(SSL *s, WPACKET *pkt,
253 unsigned int context, X509 *x,
254 size_t chainidx);
255 #endif
256 EXT_RETURN tls_construct_stoc_supported_groups(SSL *s, WPACKET *pkt,
257 unsigned int context, X509 *x,
258 size_t chainidx);
259 EXT_RETURN tls_construct_stoc_session_ticket(SSL *s, WPACKET *pkt,
260 unsigned int context, X509 *x,
261 size_t chainidx);
262 #ifndef OPENSSL_NO_OCSP
263 EXT_RETURN tls_construct_stoc_status_request(SSL *s, WPACKET *pkt,
264 unsigned int context, X509 *x,
265 size_t chainidx);
266 #endif
267 #ifndef OPENSSL_NO_NEXTPROTONEG
268 EXT_RETURN tls_construct_stoc_next_proto_neg(SSL *s, WPACKET *pkt,
269 unsigned int context, X509 *x,
270 size_t chainidx);
271 #endif
272 EXT_RETURN tls_construct_stoc_alpn(SSL *s, WPACKET *pkt, unsigned int context,
273 X509 *x, size_t chainidx);
274 #ifndef OPENSSL_NO_SRTP
275 EXT_RETURN tls_construct_stoc_use_srtp(SSL *s, WPACKET *pkt, unsigned int context,
276 X509 *x, size_t chainidx);
277 #endif
278 EXT_RETURN tls_construct_stoc_etm(SSL *s, WPACKET *pkt, unsigned int context,
279 X509 *x, size_t chainidx);
280 EXT_RETURN tls_construct_stoc_ems(SSL *s, WPACKET *pkt, unsigned int context,
281 X509 *x, size_t chainidx);
282 EXT_RETURN tls_construct_stoc_supported_versions(SSL *s, WPACKET *pkt,
283 unsigned int context, X509 *x,
284 size_t chainidx);
285 EXT_RETURN tls_construct_stoc_key_share(SSL *s, WPACKET *pkt,
286 unsigned int context, X509 *x,
287 size_t chainidx);
288 EXT_RETURN tls_construct_stoc_cookie(SSL *s, WPACKET *pkt, unsigned int context,
289 X509 *x, size_t chainidx);
290 /*
291 * Not in public headers as this is not an official extension. Only used when
292 * SSL_OP_CRYPTOPRO_TLSEXT_BUG is set.
293 */
294 #define TLSEXT_TYPE_cryptopro_bug 0xfde8
295 EXT_RETURN tls_construct_stoc_cryptopro_bug(SSL *s, WPACKET *pkt,
296 unsigned int context, X509 *x,
297 size_t chainidx);
298 EXT_RETURN tls_construct_stoc_psk(SSL *s, WPACKET *pkt, unsigned int context,
299 X509 *x, size_t chainidx);
300
301 /* Client Extension processing */
302 EXT_RETURN tls_construct_ctos_renegotiate(SSL *s, WPACKET *pkt, unsigned int context,
303 X509 *x, size_t chainidx);
304 EXT_RETURN tls_construct_ctos_server_name(SSL *s, WPACKET *pkt, unsigned int context,
305 X509 *x, size_t chainidx);
306 EXT_RETURN tls_construct_ctos_maxfragmentlen(SSL *s, WPACKET *pkt, unsigned int context,
307 X509 *x, size_t chainidx);
308 #ifndef OPENSSL_NO_SRP
309 EXT_RETURN tls_construct_ctos_srp(SSL *s, WPACKET *pkt, unsigned int context, X509 *x,
310 size_t chainidx);
311 #endif
312 #ifndef OPENSSL_NO_EC
313 EXT_RETURN tls_construct_ctos_ec_pt_formats(SSL *s, WPACKET *pkt,
314 unsigned int context, X509 *x,
315 size_t chainidx);
316 EXT_RETURN tls_construct_ctos_supported_groups(SSL *s, WPACKET *pkt,
317 unsigned int context, X509 *x,
318 size_t chainidx);
319 #endif
320 EXT_RETURN tls_construct_ctos_early_data(SSL *s, WPACKET *pkt,
321 unsigned int context, X509 *x,
322 size_t chainidx);
323 EXT_RETURN tls_construct_ctos_session_ticket(SSL *s, WPACKET *pkt,
324 unsigned int context, X509 *x,
325 size_t chainidx);
326 EXT_RETURN tls_construct_ctos_sig_algs(SSL *s, WPACKET *pkt,
327 unsigned int context, X509 *x,
328 size_t chainidx);
329 #ifndef OPENSSL_NO_OCSP
330 EXT_RETURN tls_construct_ctos_status_request(SSL *s, WPACKET *pkt,
331 unsigned int context, X509 *x,
332 size_t chainidx);
333 #endif
334 #ifndef OPENSSL_NO_NEXTPROTONEG
335 EXT_RETURN tls_construct_ctos_npn(SSL *s, WPACKET *pkt, unsigned int context,
336 X509 *x, size_t chainidx);
337 #endif
338 EXT_RETURN tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, unsigned int context,
339 X509 *x, size_t chainidx);
340 #ifndef OPENSSL_NO_SRTP
341 EXT_RETURN tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt, unsigned int context,
342 X509 *x, size_t chainidx);
343 #endif
344 EXT_RETURN tls_construct_ctos_etm(SSL *s, WPACKET *pkt, unsigned int context,
345 X509 *x, size_t chainidx);
346 #ifndef OPENSSL_NO_CT
347 EXT_RETURN tls_construct_ctos_sct(SSL *s, WPACKET *pkt, unsigned int context,
348 X509 *x, size_t chainidx);
349 #endif
350 EXT_RETURN tls_construct_ctos_ems(SSL *s, WPACKET *pkt, unsigned int context,
351 X509 *x, size_t chainidx);
352 EXT_RETURN tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt,
353 unsigned int context, X509 *x,
354 size_t chainidx);
355 EXT_RETURN tls_construct_ctos_key_share(SSL *s, WPACKET *pkt,
356 unsigned int context, X509 *x,
357 size_t chainidx);
358 EXT_RETURN tls_construct_ctos_psk_kex_modes(SSL *s, WPACKET *pkt,
359 unsigned int context, X509 *x,
360 size_t chainidx);
361 EXT_RETURN tls_construct_ctos_cookie(SSL *s, WPACKET *pkt, unsigned int context,
362 X509 *x, size_t chainidx);
363 EXT_RETURN tls_construct_ctos_padding(SSL *s, WPACKET *pkt,
364 unsigned int context, X509 *x,
365 size_t chainidx);
366 EXT_RETURN tls_construct_ctos_psk(SSL *s, WPACKET *pkt, unsigned int context,
367 X509 *x, size_t chainidx);
368 int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, unsigned int context,
369 X509 *x, size_t chainidx);
370 int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, unsigned int context,
371 X509 *x, size_t chainidx);
372 int tls_parse_stoc_early_data(SSL *s, PACKET *pkt, unsigned int context,
373 X509 *x, size_t chainidx);
374 int tls_parse_stoc_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context,
375 X509 *x, size_t chainidx);
376 #ifndef OPENSSL_NO_EC
377 int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context,
378 X509 *x, size_t chainidx);
379 #endif
380 int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, unsigned int context,
381 X509 *x, size_t chainidx);
382 #ifndef OPENSSL_NO_OCSP
383 int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, unsigned int context,
384 X509 *x, size_t chainidx);
385 #endif
386 #ifndef OPENSSL_NO_CT
387 int tls_parse_stoc_sct(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
388 size_t chainidx);
389 #endif
390 #ifndef OPENSSL_NO_NEXTPROTONEG
391 int tls_parse_stoc_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
392 size_t chainidx);
393 #endif
394 int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
395 size_t chainidx);
396 #ifndef OPENSSL_NO_SRTP
397 int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
398 size_t chainidx);
399 #endif
400 int tls_parse_stoc_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
401 size_t chainidx);
402 int tls_parse_stoc_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
403 size_t chainidx);
404 int tls_parse_stoc_supported_versions(SSL *s, PACKET *pkt, unsigned int context,
405 X509 *x, size_t chainidx);
406 int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
407 size_t chainidx);
408 int tls_parse_stoc_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
409 size_t chainidx);
410 int tls_parse_stoc_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
411 size_t chainidx);
412
413 int tls_handle_alpn(SSL *s);